WO2024012281A1

WO2024012281A1 - Carrier switching method and apparatus

Info

Publication number: WO2024012281A1
Application number: PCT/CN2023/105089
Authority: WO
Inventors: 张莉莉; 丁梦颖; 戴喜增
Original assignee: 华为技术有限公司
Priority date: 2022-07-14
Filing date: 2023-06-30
Publication date: 2024-01-18
Also published as: CN117460063A

Abstract

The present application provides a carrier switching method and apparatus, applied to a terminal device. The method comprises: receiving a first message from a network device, and switching from a first carrier set to a second carrier set according to the first message, wherein the first carrier set comprises a first carrier, the second carrier set comprises a second carrier and a third carrier, and the first message instructs a terminal device to switch from the first carrier to a carrier corresponding to a minimum timing advance (TA) or a maximum TA in the second carrier set, and/or comprises a first identifier; or the first carrier set comprises the second carrier and the third carrier, and the second carrier set comprises the first carrier; or the first carrier set comprises the first carrier and a fourth carrier, the second carrier set comprises the second carrier and the third carrier, and the first message instructs the terminal device to switch from a carrier corresponding to a minimum TA or a maximum TA in the first carrier set to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or comprises a third identifier and a fourth identifier.

Description

A carrier switching method and device

Cross-references to related applications

This application claims priority to the Chinese patent application submitted to the State Intellectual Property Office of China on July 14, 2022, with application number 202210832744.4 and the application title "A carrier switching method and device", the entire content of which is incorporated herein by reference. Applying.

Technical field

The present application relates to the field of communication technology, and in particular, to a carrier switching method and device.

Background technique

In new radio (NR) systems, the uplink transmission of terminal equipment usually results in insufficient uplink coverage of base stations due to power limitations and insufficient uplink (UL) spectrum. To this end, the NR system introduces supplementary uplink (SUL) technology, which combines the lower frequency bands of the long term evolution (LTE) system (such as 700 MHz (MHz), 800 MHz, 1.8 GHz ( GHz), or 2.1GHz, etc.) is used for NR uplink transmission, which can improve the uplink coverage of the base station. That is, when the terminal device transmits UL data in the frequency band of the NR system (such as 2.6GHz, etc.), the terminal device can use the carrier to transmit the UL data in these lower frequency bands of the LTE system according to the channel status, etc., which requires the terminal device to Dynamic switching between two carriers. For example, the terminal device can switch from a 2.6GHz carrier to a 1.8GHz carrier.

With the increasing needs of users and the use of new frequency bands (such as 4.9GHz), terminal equipment can support parallel transmission of two or more radio frequency links, which means that terminal equipment can operate on three or more Carrier switching between carriers. For example, in time slot 1, the terminal device performs uplink transmission through carrier 1. In the next time slot of time slot 1, the terminal device can switch carriers and perform uplink transmission through carrier 2 and carrier 3. For another example, in time slot 1, the terminal device performs uplink transmission through carrier 2 and carrier 3. In the next time slot of time slot 1, the terminal device can switch carriers and perform uplink transmission through carrier 1. For another example, in time slot 1, the terminal device performs uplink transmission through carrier 1 and carrier 4. In the next time slot of time slot 1, the terminal device can switch carriers and perform uplink transmission through carrier 2 and carrier 3. However, there is currently no corresponding technical solution for how to implement carrier switching of terminal equipment between three carriers or four carriers.

Contents of the invention

Embodiments of the present application provide a carrier switching method and device to implement carrier switching of a terminal device between three carriers or four carriers.

In a first aspect, the present application provides a carrier switching method, which can be executed by a terminal device or by a component of the terminal device. In the method: a first message is received from a network device, and according to the first message , switching from the first carrier set to the second carrier set; wherein the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal The device switches from the first carrier to a carrier corresponding to the minimum time advance TA or the maximum TA in the second carrier set, and/or includes a first identifier, and the first identifier is one of the second carrier sets. The identification of the TA corresponding to the carrier; or, the first carrier set includes a second carrier and a third carrier, the second carrier set includes the first carrier, and the first message instructs the terminal device to obtain the information from the first carrier. The carrier corresponding to the minimum TA or the maximum TA in the carrier set is switched to the first carrier, and/or includes a second identifier, where the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or, The first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device selects a minimum TA from the first carrier set. Or the carrier corresponding to the largest TA is switched to the carrier corresponding to the smallest TA or the largest TA in the second carrier set, and/or includes a third identifier and a fourth identifier, and the third identifier is one in the first carrier set. The identifier of the TA corresponding to the carrier, the fourth identifier is the identifier of the TA corresponding to a carrier in the second carrier set; wherein the first carrier corresponds to the first TA, and the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the second TA.

In this embodiment of the present application, the terminal device receives the first message from the network device, and switches from the first carrier set to the second carrier set according to the instruction content of the first message, thereby realizing the terminal device operating on three carriers or four carriers. switching between carriers. Furthermore, the first message may instruct the terminal device to switch from the first carrier set to the second carrier set through TA related information.

In an optional implementation, the first message instructs the terminal device to switch from the first carrier to the second carrier in the set. The carrier corresponding to the minimum TA or the maximum TA; the switching from the first carrier set to the second carrier set according to the first message may be switching from the first carrier to the second carrier or switching to the second carrier set. third carrier.

In the above method, the terminal device can determine to adjust the frequency corresponding to the radio frequency link applied to the first carrier to the frequency of the second carrier or to the frequency of the third carrier according to the instruction content of the first message, and can adjust the frequency from The state of data transmission on the first carrier is switched to the state of data transmission through the second carrier and the third carrier, so that the terminal device can perform parallel transmission through the second carrier and the third carrier, thereby improving data transmission efficiency.

In an optional implementation, the first TA is larger than the second TA, and the first message indicates that the terminal device switches from the first carrier to the smallest TA corresponding to the second carrier set. carrier, the first message also indicates that the first switching interval is configured on the carrier before carrier switching, and the method further includes: determining that the first switching interval is the difference between the first value and the second value, or is first value;

Alternatively, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier before carrier switching, and the method further includes: determining that the first switching interval is a first value, or the sum of the first value and the second value;

Alternatively, the first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to a carrier corresponding to the smallest TA in the second carrier set, and the first message It is also indicated that the first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the method further includes: determining the first switching interval as the difference between the first value and the second value;

Alternatively, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to a carrier corresponding to the smallest TA in the second carrier set, and the first message It is also indicated that the first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the method further includes: determining that the first switching interval is a first value;

Alternatively, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to a carrier corresponding to the largest TA in the second carrier set, and the first message It is also indicated that the first part of the first switching interval is configured on the carrier before carrier switching, and the remaining part of the first switching interval except the first part is configured on the maximum TA of the second carrier set. On the corresponding carrier, the method further includes: determining the first part to be a second value and the remaining part to be a first value, or determining the first part to be a first value and the remaining part to be a second value;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process of the two carriers, the first value is the length of time the terminal equipment adjusts the radio frequency link between the two carriers, and the second value is the The difference between the first TA and the second TA.

In the above manner, the terminal device can determine the carrier that is interrupted during switching from the first carrier to the second carrier or to the third carrier according to the instruction content of the first message, and the duration of the interruption of the carrier.

In an optional implementation manner, the switching from the first carrier set to the second carrier set according to the first message may be that the first identifier is the identifier of the first TA, and the switch from the first carrier set to the second carrier set may be the first identifier. The first carrier is switched to the third carrier; or the first identifier is the identifier of the second TA, and the first carrier is switched to the second carrier.

In the above manner, the terminal device may determine to adjust the frequency corresponding to the radio frequency link applied to the first carrier to the frequency of the second carrier or to the frequency of the third carrier according to the TA identifier carried in the first message.

In an optional implementation, the first message instructs the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier; , switching from the first carrier set to the second carrier set may be switching from the second carrier or the third carrier to the first carrier.

In the above method, the terminal device may determine to adjust the frequency corresponding to the radio frequency link applied to the second carrier to the frequency of the first carrier according to the instruction content of the first message, or determine to adjust the radio frequency link applied to the third carrier. The frequency corresponding to the channel is adjusted to the frequency of the first carrier, which can switch from the state of data transmission through the second carrier and the third carrier to the state of data transmission through the first carrier, which can reduce the power consumption of the terminal equipment.

In an optional implementation, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the third carrier set. A carrier, the first message also indicates that the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or is configured on the carrier after carrier switching, the method further includes: determining the The first switching interval is a first value;

Alternatively, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message It is also indicated that the first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching. The method further includes: determining that the first switching interval is a first value. The difference from the second value;

Alternatively, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch to the first carrier from a carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the The first message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and that the remaining part of the first switching interval except the first part is configured Configured on the carrier corresponding to the largest TA in the first carrier set, the method further includes: determining the first part to be a first value and the remaining part to be the difference between the first value and the second value;

Alternatively, the first TA is larger than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message It is also indicated that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier switching On the subsequent carrier, the method further includes: determining the first part to be a second value and the remaining part to be a first value, or determining the first part to be a first value and the remaining part to be a second value;

In the above manner, the terminal device can determine the carrier that is interrupted during the switching from the second carrier or the third carrier to the first carrier and the duration of the interruption of the carrier according to the instruction content of the first message.

In an optional implementation manner, the switching from the first carrier set to the second carrier set according to the first message may be that the second identifier is the identifier of the first TA, and the second identifier is the identifier of the first TA. The third carrier is switched to the first carrier; or the second identifier is the identifier of the second TA, and the second carrier is switched to the first carrier.

In the above method, the terminal device can determine, based on the TA identification carried in the first message, to adjust the frequency corresponding to the radio frequency link applied to the second carrier to the frequency of the first carrier or to adjust the radio frequency applied to the third carrier. The frequency corresponding to the link is adjusted to the frequency of the first carrier.

In an optional implementation, the first message instructs the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the minimum TA or the maximum TA in the second carrier set. The corresponding carrier; the switching from the first carrier set to the second carrier set according to the first message may be switching from the first carrier to the second carrier, and switching from the fourth carrier to the third carrier; or, switching from the first carrier to the third carrier, and switching from the fourth carrier to the second carrier.

In the above method, the terminal device can determine, according to the instruction content of the first message, to adjust the frequency corresponding to the radio frequency link applied to the first carrier to the frequency of the second carrier, and to adjust the radio frequency link applied to the fourth carrier. Adjust the corresponding frequency to the frequency of the third carrier, or determine to adjust the frequency corresponding to the radio frequency link applied to the first carrier to the frequency of the third carrier, and adjust the frequency corresponding to the radio frequency link applied to the fourth carrier to The frequency of the second carrier can be switched from a state of data transmission through the first carrier and a fourth carrier to a state of data transmission through the second carrier and a third carrier.

In an optional implementation, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the second carrier. The carrier corresponding to the smallest TA in the set, and/or instructing the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, the first message also Instructing that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, the method further includes: Determine the second switching interval to be a first value and the third switching interval to be the first value, or determine the second switching interval to be a first value and the third switching interval to be the first value the sum of the second value;

Alternatively, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, the method further includes: determining the second switching interval to The first value and the third switching interval are the first value, or the second switching interval is determined to be the sum of the first value and the second value and the third switching interval is the first value;

Alternatively, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the third On the carrier corresponding to the smallest TA in a carrier set, the method further includes: determining the second switching interval to be the sum of the first value and the second value and the third switching interval to be the sum of the first value and the The difference between the second values;

Alternatively, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, the method further includes: determining the second switching The interval is the sum of the first value and the second value and the third switching interval is the difference between the first value and the second value, or the second switching interval is determined to be the sum of the first value and the second value. and the third switching interval is the first value;

Alternatively, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is is configured on the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the third switching interval except The remaining part other than the first part is configured on the carrier corresponding to the largest TA in the second carrier set, and the method further includes: determining the second switching interval as the difference between the first value and the second value, the first portion being the second value and the remaining portion being the first value;

Alternatively, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates that in the second switching interval The first part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on the carrier, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, the method further includes: determining the first part as a second value, and the remaining part as a first value , and the third switching interval is the difference between the first value and the second value;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the length of time the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the length of the fourth carrier. The length of time the carrier is interrupted during the process of switching to the second carrier; wherein the first value is the length of time the terminal equipment adjusts the radio frequency link between the two carriers, and the second value is the first The difference between TA and the second TA.

In the above manner, the terminal device may determine to switch from the first carrier to the second carrier and from the fourth carrier to the third carrier according to the instruction content of the first message, or to switch from the first carrier to the third carrier and from The carrier that was interrupted when the fourth carrier was switched to the second carrier, and the length of time that the carrier was interrupted.

In an optional implementation, the switching from the first carrier set to the second carrier set according to the first message may be:

The third identifier is the identifier of the first TA, the fourth identifier is the identifier of the first TA, switching from the first carrier to the third carrier, and switching from the fourth carrier to the second carrier;

Alternatively, the third identifier is the identifier of the second TA, the fourth identifier is the identifier of the second TA, switching from the fourth carrier to the second carrier, and switching from the first carrier to the second carrier. The carrier is switched to the third carrier;

Alternatively, the third identifier is the identifier of the first TA, the fourth identifier is the identifier of the second TA, switching from the first carrier to the second carrier, and switching from the fourth carrier to the second carrier. The carrier is switched to the third carrier;

Alternatively, the third identifier is the identifier of the second TA, the fourth identifier is the identifier of the first TA, switching from the fourth carrier to the third carrier, and from the first The carrier is switched to the second carrier.

In the above method, the terminal device can determine, based on the TA identification carried in the first message, to adjust the frequency corresponding to the radio frequency link applied to the first carrier to the frequency of the second carrier and to adjust the radio frequency link of the fourth carrier. The corresponding frequency is adjusted to the frequency of the third carrier, the corresponding frequency of the radio frequency link applied to the first carrier is adjusted to the frequency of the third carrier, and the corresponding frequency of the radio frequency link applied to the fourth carrier is adjusted to the frequency of the second carrier .

In an optional implementation, the method may further include: sending a second message to the network device, where the second message includes one or more of the following information:

Whether the terminal device supports sending data on two carriers at different times, and during the transmission of one of the two carriers, the other of the two carriers has completed the adjustment of the radio frequency link;

Or, after the switching of one radio frequency link is completed, whether the terminal device supports communication through the one radio frequency link after waiting for the completion of switching of other radio frequency links except the one radio frequency link;

Or, the terminal equipment supports switching between multiple carriers corresponding to different TAs;

Or, whether the terminal device supports parallel transmission on multiple carriers according to a third value, where the third value is the duration of adjusting the radio frequency link between two carriers supported by the terminal device;

Or, whether the terminal device supports a shared frequency band between the first frequency band and the second frequency band, where the first frequency band is a frequency band where one carrier before carrier switching is located, or is a frequency band where multiple carriers before carrier switching are located. One or more frequency bands, the second frequency band is a frequency band where one carrier after carrier switching is located, or one or more frequency bands where multiple carriers after carrier switching are located;

Or, whether the terminal device supports a configured fallback frequency band;

Or, when the terminal equipment switches between multiple frequency bands, whether it supports carrier switching in response to the sounding reference signal.

In the above method, the terminal device can report its own capability information to the network device, so that the network device can instruct the terminal device to perform handover between three carriers or perform handover between four carriers based on the capability information.

In an optional implementation, the method may further include: receiving the first TA and the second TA from the network device.

In a second aspect, this application provides a carrier switching method, which can be executed by a terminal device or by a component of the terminal device. The method includes: sending a second message to the network device, the second message including one or more of the following information:

Or, whether the terminal device supports a configured fallback frequency band;

In an optional implementation, the method may further include: receiving a first message from the network device, and switching from the first carrier set to the second carrier set according to the first message; wherein the first A carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates a minimum time for the terminal device to switch from the first carrier to the second carrier set. The carrier corresponding to the advance TA or the maximum TA, and/or includes a first identifier, which is an identifier of a TA corresponding to a carrier in the second carrier set; or the first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message instructs the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier , and/or includes a second identifier, the second identifier being an identifier of a TA corresponding to a carrier in the first carrier set; or, the first carrier set includes a first carrier and a fourth carrier, and the third carrier The two carrier sets include a second carrier and a third carrier, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA or the largest TA in the first carrier set to the smallest TA or the smallest TA in the second carrier set. The carrier corresponding to the largest TA, and/or includes a third identifier and a fourth identifier, the third identifier is the identifier of the TA corresponding to a carrier in the first carrier set, and the fourth identifier is the second carrier The identification of the TA corresponding to one of the concentrated carriers;

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the second TA.

In an optional implementation manner, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set; according to the first message , switching from the first carrier set to the second carrier set may be switching from the first carrier to the second carrier or to the third carrier.

In an optional implementation, the first message instructs the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the minimum TA or the maximum TA in the second carrier set. Corresponding carrier;

The switching from the first carrier set to the second carrier set according to the first message may be switching from the first carrier to the second carrier set. carrier, and switching from the fourth carrier to the third carrier; or, switching from the first carrier to the third carrier, and switching from the fourth carrier to the second carrier.

Alternatively, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, the method further includes: determining the second switching The interval is the sum of the first value and the second value and the third switching interval is the difference between the first value and the second value;

In a third aspect, the present application provides a carrier switching method, which can be executed by a network device or by a component of the network device. The method includes: configuring a first TA and a second TA for a terminal device, and sending a first message to the terminal device; wherein the first carrier set includes a first carrier, and the second carrier set includes a second carrier and a third carrier, the first message instructs the terminal device to switch from the first carrier to a carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or includes a first identifier, and the third carrier An identifier is an identifier of a TA corresponding to a carrier in the second carrier set;

Alternatively, the first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message indicates that the terminal device selects a minimum TA or a maximum TA from the first carrier set. The carrier corresponding to the TA is switched to the first carrier, and/or includes a second identifier, where the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set;

Alternatively, the first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device selects a carrier from the first carrier set. The carrier corresponding to the minimum TA or the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or includes a third identifier and a fourth identifier, and the third identifier is the carrier in the first carrier set. The identifier of the TA corresponding to one carrier, and the fourth identifier is the identifier of the TA corresponding to one carrier in the second carrier set;

In an optional implementation, the first TA is larger than the second TA, and the first message indicates that the terminal device switches from the first carrier to the smallest TA corresponding to the second carrier set. carrier, the first message also indicates that the first switching interval is configured on the carrier before carrier switching, or is configured on the carrier corresponding to the smallest TA in the second carrier set;

Alternatively, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier before carrier switching, or on the carrier corresponding to the smallest TA in the second carrier set;

Alternatively, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to a carrier corresponding to the largest TA in the second carrier set, and the first message It is also indicated that the first part of the first switching interval is configured on the carrier before carrier switching, and the remaining part of the first switching interval except the first part is configured on the maximum TA of the second carrier set. on the corresponding carrier;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process between two carriers.

In an optional implementation manner, the first identification is an identification of the first TA or an identification of the second TA.

In an optional implementation, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the third carrier set. A carrier, the first message also indicates that the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or is configured on the carrier after carrier switching;

Alternatively, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message It also indicates that the first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching;

Alternatively, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch to the first carrier from a carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the The first message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and that the remaining part of the first switching interval except the first part is configured Configured on the carrier corresponding to the largest TA in the first carrier set;

Alternatively, the first TA is larger than the second TA, and the first message indicates that the terminal device selects the highest value from the first carrier set. The carrier corresponding to the small TA is switched to the first carrier, the first message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the first The remainder of the switching interval except the first part is configured on the carrier after carrier switching;

Wherein, the first switching interval is a time period for the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier.

In an optional implementation manner, the second identification is an identification of the first TA or an identification of the second TA.

In an optional implementation, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the second carrier. The carrier corresponding to the smallest TA in the set, and/or instructing the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, the first message also Indicate that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set;

Alternatively, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set. The first message also indicates that the second switching interval is configured in on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set;

Alternatively, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is It is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set;

Alternatively, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is It is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set;

Alternatively, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is is configured on the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the third switching interval except The remaining part other than the first part is configured on the carrier corresponding to the largest TA in the second carrier set;

Alternatively, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates that in the second switching interval The first part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on the carrier, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the length of time the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the length of the fourth carrier. The length of time the carrier is interrupted during switching to the second carrier.

In an optional implementation manner, the third identification is the identification of the first TA, and the fourth identification is the identification of the first TA; or, the third identification is the identification of the second TA. The identifier of the TA, the fourth identifier is the identifier of the second TA; or, the third identifier is the identifier of the first TA, and the fourth identifier is the identifier of the second TA; or, The third identification is the identification of the second TA, and the fourth identification is the identification of the first TA.

In an optional implementation, the method may further include: receiving a second message from the terminal device, where the second message includes one or more of the following information:

Or, whether the terminal device supports a configured fallback frequency band;

In an optional implementation manner, sending the first message to the terminal device may be sending the first message to the terminal device according to the second message.

In an optional implementation manner, configuring the first time advance TA and the second TA for the terminal device may include: sending the first TA and the second TA to the terminal device.

In a fourth aspect, the present application provides a carrier switching method, which may be executed by a network device or by a component of the network device. The method includes: receiving a second message from the terminal device, the second message including one or more of the following information:

Alternatively, the terminal equipment supports switching between multiple carriers corresponding to different TAs;

Or, whether the terminal device supports a configured fallback frequency band;

In an optional implementation, the method may further include: configuring a first time advance and TA and a second TA for the terminal device, and sending a first message to the terminal device; wherein the first carrier The set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates a minimum time advance for the terminal device to switch from the first carrier to the second carrier set. The carrier corresponding to the TA or the maximum TA, and/or includes a first identifier, where the first identifier is the identifier of the TA corresponding to a carrier in the second carrier set;

Alternatively, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the first carrier to the third carrier. The carrier corresponding to the smallest TA in the second carrier set, the first message also indicates that the first switching interval is configured on the carrier before carrier switching, or is configured on the carrier corresponding to the smallest TA in the second carrier set;

Alternatively, the first TA is larger than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message It is also indicated that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier switching on the subsequent carrier;

Alternatively, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA in the first carrier set to a carrier corresponding to the largest TA in the second carrier set. carrier, and/or instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set. The remaining part of the three handover intervals except the first part is configured on the carrier corresponding to the largest TA in the second carrier set;

In a fifth aspect, the present application provides a communication device. The communication device is used to perform the method described in the above-mentioned first aspect and any possible implementation manner of the first aspect, or is used to perform the method described in the above-mentioned second aspect and any possible implementation manner of the second aspect. method described. The communication device is, for example, a terminal device, or a functional module in the terminal device, such as a baseband device or a chip system. In a possible implementation, the communication device includes a baseband device and a radio frequency device. In another possible implementation, the communication device includes a processing module (sometimes also called a processing unit) and a transceiver module (sometimes also called a transceiver unit). The transceiver unit can realize the sending function and the receiving function. When the transceiver module realizes the sending function, it can be called the sending module (sometimes also called the sending unit). When the transceiver module realizes the receiving function, it can be called the receiving module (sometimes also called the receiving module). receiving unit). The sending module and the receiving module can be the same functional module, which is called the sending and receiving module. This functional module can realize the sending function and the receiving function; or the sending module and the receiving module can be different functional modules, and the sending and receiving module is responsible for these functions. The collective name for functional modules.

In a sixth aspect, the present application provides a communication device. The communication device is used to perform the method described in the above third aspect and any possible implementation manner of the third aspect, or is used to perform the method described in the above fourth aspect and any possible implementation manner of the fourth aspect. method described. The communication device is, for example, a network device, or a functional module in the network device, such as a baseband device or a chip system. In a possible implementation, the communication device includes a baseband device and a radio frequency device. In another possible implementation, the communication device includes a processing module (sometimes also called a processing unit) and a transceiver module (sometimes also called a transceiver unit). The transceiver unit can realize the sending function and the receiving function. When the transceiver module realizes the sending function, it can be called the sending module (sometimes also called the sending unit). When the transceiver module realizes the receiving function, it can be called the receiving module (sometimes also called the receiving module). receiving unit). The sending module and the receiving module can be the same functional module, which is called the sending and receiving module. This functional module can realize the sending function and the receiving function; or the sending module and the receiving module can be different functional modules, and the sending and receiving module is responsible for these functions. The collective name for functional modules.

In a seventh aspect, the present application provides a communication device. The communications device may include one or more processors. Optionally, the communication device may also include a memory. Wherein, the memory is used to store one or more computer programs or instructions. The one or more processors are configured to execute the one or more computer programs or instructions stored in the memory, so that the communication device executes the first aspect and any of the possible implementations of the first aspect. The method described above, or perform the method described in the above second aspect and any possible implementation manner of the second aspect.

In an eighth aspect, the present application provides a communication device. The communications device may include one or more processors. Optionally, the communication device may also include a memory. Wherein, the memory is used to store one or more computer programs or instructions. The one or more processors are configured to execute the one or more computer programs or instructions stored in the memory, so that the communication device executes the above third The method described in any possible implementation manner of the fourth aspect and the third aspect, or perform the method described in any possible implementation manner of the fourth aspect and the fourth aspect.

In a ninth aspect, the present application provides a computer-readable storage medium, which is used to store computer programs or instructions that, when executed, make any one of the above-mentioned aspects possible. The method described in the implementation mode is realized; or the method described in the implementation mode making any one of the above second aspect and the second aspect possible is realized; or making any one of the above third aspect and the third aspect possible The method described in the implementation manner is implemented; or the method described in the above fourth aspect and any possible implementation manner of the fourth aspect is implemented.

In a tenth aspect, the present application provides a computer program product containing instructions that, when run on a computer, enable the method described in the above first aspect and any possible implementation of the first aspect to be implemented; or enable The method described in the above second aspect and any possible implementation of the second aspect is implemented; or the method described in the above third aspect and any possible implementation of the third aspect is implemented; or so that The method described in the above fourth aspect and any possible implementation manner of the fourth aspect is implemented.

In an eleventh aspect, the present application also provides a chip, which is coupled to a memory and used to read and execute program instructions in the memory, so that the device where the chip is located realizes the above first aspect and the first aspect. The method described in any possible implementation manner; or in such a way that the device where the chip is located implements the above second aspect and the method described in any possible implementation manner of the second aspect; or in such a way that the chip is located in The device implements the method described in any one of the above third aspect and the possible implementation manner of the third aspect; or the device where the chip is located implements the method described in any one of the above fourth aspect and the possible implementation manner of the fourth aspect. Methods.

In a twelfth aspect, the present application further provides a communication system, including the communication device described in the fifth aspect, and/or the communication device described in the sixth aspect.

For the technical effects that can be achieved by the above-mentioned second to twelfth aspects and any of their possible implementation methods, please refer to the technical effects that can be achieved by the above-mentioned first aspect and any of their possible implementation methods, which will not be discussed here. Repeat.

Description of drawings

Figure 1 is a schematic diagram of a communication system applicable to the embodiment of the present application;

Figure 2A is a schematic diagram of base station 1 and base station 2 sharing the same site in the embodiment of the present application;

Figure 2B is a schematic diagram of the different site addresses of base station 1 and base station 2 in the embodiment of the present application;

Figure 3 is a schematic flow chart of a carrier switching method provided by an embodiment of the present application;

Figures 4 to 28 are schematic diagrams of carrier switching provided by embodiments of the present application;

Figure 29 is a schematic diagram of a communication device provided by an embodiment of the present application;

Figure 30 is another schematic diagram of a communication device provided by an embodiment of the present application.

Detailed ways

In order to make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, some terms involved in the embodiments of the present application are first explained below.

(1) Timing advance (TA), which can include uplink TA, downlink TA, or uplink TA and downlink TA. The uplink TA is used for uplink transmission. In order to make the uplink data packets of the terminal equipment reach the base station at the desired time, the radio frequency transmission delay caused by the distance between the terminal equipment and the base station is estimated and the uplink data is sent in advance accordingly. Bag. The downlink TA is used for downlink transmission. In order to make the downlink data packets from the base station reach the terminal equipment at the desired time, the radio frequency transmission delay caused by the distance between the terminal equipment and the base station is estimated, and the corresponding time is provided to send the downlink data. Bag.

(2) Timing advance group (TAG), including one or more serving cells, and a TAG has the same TA.

(3) Switch gap, also known as interruption time, interruption time, etc., can be understood as the carrier being interrupted (or hit) due to adjustments to the radio frequency (RF) link during the carrier switching process. The time period (or duration) during which the carrier is interrupted (or interrupted) when the terminal device adjusts the radio frequency link between the two carriers.

When a carrier is interrupted (or interrupted) due to carrier switching, it can be said that the switching interval is configured on the carrier, or it can be said that the switching interval is located on the carrier, etc. This is not limited by the embodiments of the present application. For the convenience of description, the following takes the handover interval configured on the carrier as an example. Furthermore, if the carrier is configured with a switching interval, it means that the terminal device cannot receive signals through the carrier during the switching interval, nor can it send signals through the carrier.

For example, if the terminal device switches from carrier 1 to carrier 2, and the switching interval is configured on carrier 1, then the terminal device switches during the switching interval. The device cannot receive signals through this carrier 1, nor can it send signals through this carrier 1. For another example, if the terminal device switches from carrier 1 to carrier 2, and the switching interval is configured on carrier 2, then the terminal device cannot receive signals through carrier 2 during the switching interval, nor can it send signals through carrier 2. For another example, the terminal equipment switches from carrier 1 to carrier 2, a part of the switching interval is configured on carrier 1, and the remaining part of the switching interval except this part is configured on carrier 2, then the terminal device within this part The device cannot receive a signal over carrier 1, nor over carrier 1, and the terminal device cannot receive a signal over carrier 2, nor over carrier 2, within this remainder.

It should be noted that the adjustment of the radio frequency link involved in the embodiment of the present application can be understood as radio frequency adjustment (RF tuning), or it can also be understood as radio frequency re-adjustment (RF retuning), etc.

(4) The first value (can be recorded as switch period) involved in the embodiment of this application can be understood as a fixed value, which is the time period for the terminal device to adjust the radio frequency link between two carriers, for example, two corresponding TAs corresponding to the same TA. Adjust the duration of the RF link between carriers. The first value may be a predefined fixed value, or may be a fixed value determined by the network device, or may be a fixed value determined by the terminal device, but the embodiment of the present application is not limited thereto. For example, the first value may be a fixed value determined by the network device based on the capability information of the terminal device and sent to the terminal device. For another example, the first value may be a fixed value determined by the terminal device based on its own capability information and sent to the network device.

(5) The third value involved in the embodiment of this application can be understood as the duration of adjusting the radio frequency link between two carriers supported by the terminal equipment, or it can also be understood as the time required for the terminal equipment to switch between two frequency bands. Duration, or can also be understood as the time required for a terminal device to switch from one frequency band that supports one or more radio frequency links to another frequency band that supports one or more radio frequency links. The third value may be determined by hardware conditions of the terminal device, etc. The third value may be, for example, 35 microseconds (us), 140us, 210us, or 280us, etc. The third value in the embodiment of the present application is not limited thereto. It should be understood that the number of the third value may be one or multiple.

Optionally, the terminal device may determine the first value based on the third value. For example, there are multiple third values, and the terminal device may determine one of the third values as the first value from the multiple third values. For another example, the third value is one, and the terminal device may determine that the third value is the first value.

Optionally, the terminal device can send the third value to the network device as its own capability information, such as through radio resource control (RRC) signaling. Further, the network device may determine the first value according to the third value, and send the first value to the terminal device. For example, there are multiple third values, and the network device may determine one of the third values as the first value from the multiple third values. For another example, the third value is one, and the network device may determine that the third value is the first value.

(6) In the embodiments of this application, "plurality" means two or more. In view of this, "plurality" in the embodiments of this application can also be understood as "at least two". "At least one" can be understood as one or more, for example, one, two or more. For example, including at least one means including one, two or more, and it does not limit which ones are included. For example, if it includes at least one of A, B and C, then it can include A, B, C, A and B, A and C, B and C, or A and B and C. "And/or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/", unless otherwise specified, generally indicates that the related objects are in an "or" relationship. The terms "system" and "network" in the embodiments of this application may be used interchangeably. The terms "according to" and "based on" in the embodiments of this application may be used interchangeably.

Unless otherwise stated, ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects and are not used to limit the order, timing, priority or importance of multiple objects. For example, the first carrier, the second carrier, the third carrier and the fourth carrier involved in the embodiment of the present application are used to distinguish multiple carriers and do not limit the priority or importance of the multiple carriers. For another example, the first TA and the second TA involved in the embodiment of this application are used to distinguish multiple TAs and do not limit the size, priority or importance of the multiple TAs.

In addition, in the embodiments of this application, the word "exemplary" is used to represent an example, illustration or explanation. Any embodiment or design described herein as "exemplary" is not intended to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of the word "exemplary" is intended to present the concept in a concrete way.

This application will present various aspects, embodiments, or features in terms of systems, which may include multiple devices, components, modules, etc. It should be understood and appreciated that various systems may include additional devices, components, modules, etc., and/or may not include all devices, components, modules, etc. discussed in connection with the figures. Additionally, a combination of these scenarios can be used.

The communication system applicable to the embodiments of this application is introduced below.

The technical solutions of the embodiments of the present application can be applied to various communication systems, such as long term evolution (LTE) systems. system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), fifth generation (5th generation, 5G) mobile communication system or new radio (new radio, NR) system , or applied to future communication systems or other similar communication systems.

Figure 1 is a schematic architectural diagram of a communication system applied in an embodiment of the present application. As shown in Figure 1, the communication system 1000 includes a wireless access network 100 and a core network 200. Optionally, the communication system 1000 may also include the Internet 300. The wireless access network 100 may include at least one network device, such as 110a and 110b in Figure 1, and may also include at least one terminal device, such as 120a-120j in Figure 1. Among them, 110a is a base station, 110b is a micro station, 120a, 120e, 120f and 120j are mobile phones, 120b is a car, 120c is a gas pump, and 120d is a home access point (HAP) arranged indoors or outdoors. 120g is a laptop, 120h is a printer, and 120i is a drone. Among them, the same terminal device or network device can provide different functions in different application scenarios. For example, the mobile phones in Figure 1 include 120a, 120e, 120f and 120j. Mobile phone 120a can access the base station 110a, connect to the car 120b, directly communicate with the mobile phone 120e and access the HAP. The mobile phone 120b can access the HAP and communicate with the mobile phone 120a. For direct communication, mobile phone 120f can be connected as micro station 110b, connected to laptop 120g, connected to printer 120h, and mobile phone 120j can control drone 120i.

Network equipment is a network-side device with wireless transceiver functions. The network equipment can be a device in the radio access network (RAN) that provides wireless communication functions for terminal equipment, which is called RAN equipment. For example, the wireless access network equipment may be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission reception point (TRP), a fifth generation (5th generation, 5G) mobile communication system The next generation base station (next generation NodeB, gNB), the base station in the sixth generation (6th generation, 6G) mobile communication system, the base station in the future mobile communication system or the access node in the WiFi system, etc.; it can also be completed Modules or units with some functions of the base station, for example, can be a centralized unit (CU) or a distributed unit (DU). The CU here completes the functions of the base station's radio resource control protocol and packet data convergence protocol (PDCP), and can also complete the functions of the service data adaptation protocol (SDAP); DU completes the functions of the base station The functions of the wireless link control layer and medium access control (MAC) layer can also complete some or all of the physical layer functions. For specific descriptions of each of the above protocol layers, please refer to the Third Generation Partner Program (3rd generation partnership project, 3GPP) related technical specifications. The network device may be a macro base station (110a in Figure 1), a micro base station or an indoor station (110b in Figure 1), a high-frequency base station, a relay node or a donor node, etc. The embodiments of this application do not limit the specific technology and specific equipment form used by the network equipment.

The terminal device is a user-side device with wireless transceiver function. Terminal equipment can also be called terminal, user equipment (UE), mobile station, mobile terminal, etc. Terminal devices can be widely used in various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, machine-type communication (MTC), and the Internet of Things (internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, wearable devices, vehicles, drones, helicopters, airplanes, ships, robots, robotic arms, smart home devices, etc. In the embodiment of the present application, the device used to realize the function of the terminal device may be a terminal device, or may be a device capable of supporting the terminal device to realize the function, such as a chip system or a combined device or component that can realize the function of the terminal device. The device Can be installed in terminal equipment. The embodiments of this application do not limit the specific technology and specific equipment form used by the terminal equipment.

Network equipment and terminal equipment can be fixed-location or removable. Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the sky. The embodiments of this application do not limit the application scenarios of network devices and terminal devices.

The roles of network equipment and terminal equipment may be relative. For example, the helicopter or drone 120i in Figure 1 may be configured as a mobile network equipment, for those terminal equipment 120j that accesses the wireless access network 100 through 120i. , the terminal device 120i is a network device; but for the network device 110a, 120i is a terminal device, that is, communication between 110a and 120i is through a wireless air interface protocol. Of course, communication between 110a and 120i may also be carried out through an interface protocol between network devices. In this case, relative to 110a, 120i is also a network device. Therefore, both network equipment and terminal equipment can be collectively called communication devices. 110a and 110b in Figure 1 can be called communication devices with network equipment functions, and 120a-120j in Figure 1 can be called communication devices with terminal equipment functions. .

In the embodiments of the present application, the functions of the network device may also be executed by modules (such as chips) in the network device, or may be executed by a control subsystem that includes the functions of the network device. The control subsystem here that includes network equipment functions can be the control center in the above application scenarios such as smart grid, industrial control, smart transportation, smart city, etc. The functions of the terminal equipment can also be performed by modules in the terminal equipment (such as chips or modems), or can be performed by devices containing the functions of the terminal equipment.

The communication system applicable to the embodiments of the present application has been described above. Next, some technical features involved in the embodiments of the present application will be introduced.

In NR systems, the uplink transmission of terminal equipment usually results in insufficient uplink coverage of the base station due to power limitations, insufficient uplink spectrum and other reasons. To this end, the NR system introduces supplementary uplink SUL technology. This technology can improve the uplink performance of the base station by using the carrier corresponding to the lower frequency band of the LTE system (such as 700MHz, 800MHz, 1.8GHz, or 2.1GHz, etc.) for NR uplink transmission. cover. That is, when the terminal device transmits UL data in the frequency band of the NR system (such as 2.6GHz, etc.), the terminal device can use the carrier to transmit the UL data in these lower frequency bands of the LTE system according to the channel status and so on. Currently, new frequency bands such as 4.9GHz can provide higher bandwidth spectrum resources and have the prospect of being used in NR systems to improve the uplink coverage of base stations. Among them, the lower frequency band of the LTE system is marked as SUL 1, the frequency band of the NR system is marked as NUL, and new frequency bands such as 4.9GHz are marked as SUL 2.

On the one hand, with the increasing needs of users and the use of new frequency bands (such as 4.9GHz), terminal equipment can support parallel transmission of two or more radio frequency links, which means that terminal equipment can operate on three or more radio frequency links. Carrier switching is performed between more than one carrier. For example, in time slot 1, the terminal device performs uplink transmission through carrier 1. In the next time slot of time slot 1, the terminal device can switch carriers and perform uplink transmission through carrier 2 and carrier 3. For another example, in time slot 1, the terminal device performs uplink transmission through carrier 2 and carrier 3. In the next time slot of time slot 1, the terminal device can switch carriers and perform uplink transmission through carrier 1. For another example, in time slot 1, the terminal device performs uplink transmission through carrier 1 and carrier 4. In the next time slot of time slot 1, the terminal device can switch carriers and perform uplink transmission through carrier 2 and carrier 3. However, there is currently no corresponding technical solution for how to implement carrier switching of terminal equipment between three carriers or four carriers.

On the other hand, current terminal equipment supports dynamic switching between two carriers. The two carriers correspond to the same TA. The switching interval during the switching process of the two carriers is equal to the first value. The corresponding TA of the two carriers is not considered. The difference between the two TAs. In the scenario where the terminal equipment switches between three carriers (or four carriers), the frequencies of the three carriers (or four carriers) may belong to multiple frequency bands, then the three carriers (or four carriers) are provided The number of network devices can be multiple, and these network devices can be at the same site (ie, co-site deployment) or at different sites (ie, different site deployment). In the case where these network devices have different addresses, the three TAs (or four TAs) corresponding to the three carriers (or four carriers) may be different.

Taking network device 1 to provide SUL 2 and network device 2 to provide SUL 1 and NUL as an example, network device 1 and network device 2 can share the same site (i.e., network device 1 and network device 2 are deployed at the same site), as shown in Figure 2A ; Alternatively, network device 1 and network device 2 may also be at different sites (that is, network device 1 and network device 2 are deployed at different sites), as shown in Figure 2B. In the scenario of Figure 2A, network device 1 and network device 2 are at different sites, and the communication distance between the terminal device and network device 1 is the same as the communication distance between the terminal device and network device 2, then the terminal device and the network device The TA between 1 and the TA between the terminal device and network device 2 is also the same. In the scenario of Figure 2B, network device 1 and network device 2 are at different sites, and the communication distance between the terminal device and network device 1 is different from the communication distance between the terminal device and network device 2, then the terminal device and the network The TA between device 1 and the TA between the terminal device and network device 2 are also different. It should be understood that the network equipment used to provide SUL 1 and the network equipment used to provide NUL may be at the same site or at different sites. However, for the convenience of description, the embodiment of this application uses the network equipment used to provide SUL 1. For example, the network device and the network device used to provide NUL share the same site address.

Next, the carrier switching method provided by the embodiment of the present application will be introduced with reference to the accompanying drawings.

It should be noted that this embodiment of the present application involves carrier switching of a terminal device between three or more carriers. For the convenience of description, the carrier switching of the terminal device among three carriers and the carrier switching among four carriers are taken as examples in the following. In the embodiment of the present application, the frequency band where the carrier before switching is located and the frequency band where the carrier is after switching can be different frequency bands, or they can be the same frequency band. In the following, the frequency band where the carrier before switching is located and the frequency band where the carrier is after switching are used. The frequency bands are different frequency bands for example. When the frequency band where the carrier before switching is located is different from the frequency band where the carrier is after switching, the terminal device switching between multiple carriers in the embodiment of the present application may also be called the terminal device switching between multiple frequency bands. In addition, the two frequency bands where the two carriers before switching are located may be the same frequency band or may be different frequency bands. The two frequency bands where the two carriers are located after switching may be the same frequency band or different frequency bands.

It should be noted that the terminal device in the embodiment of the present application can support parallel transmission of two or more radio frequency links. For ease of understanding, the following article takes the terminal device supporting parallel transmission of two radio frequency links as an example. In addition, the methods provided by various embodiments of the present application can be applied to the communication system shown in Figure 1, Figure 2A or Figure 2B. The terminal equipment involved in various embodiments of the present application may be the terminal equipment shown in any one of 120a-120j in Figure 1, or UE1 or UE2 in Figure 2A, or UE1 or UE2 in Figure 2B. The network device involved in various embodiments of the present application may be the network device shown as 110a or 110b in Figure 1, or the network device 1 or network device 2 in Figure 2A, or the network device 1 or the network in Figure 2B Device 2.

Figure 3 is a schematic flowchart of a carrier switching method provided by an embodiment of the present application. As shown in Figure 3, the method flow may include the following content.

S301: The network device configures the first TA and the second TA for the terminal device. Or the network device configures the first TAG and the second TAG for the terminal device.

For example, the first TA (can be recorded as TA1) may be the TA when the terminal device communicates with the network device A. The second TA (can be recorded as TA2) may be the TA when the terminal device communicates with network device B. The first TAG may be the TAG to which TA belongs when the terminal device communicates with network device A. The second TAG may be the TAG to which TA belongs when the terminal device communicates with network device B. The first TA and the second TA may be the same or different. The following description takes the first TA and the second TA as being different as an example. Among them, the first TA belongs to the first TAG, or the first TA is the TA value corresponding to the first TAG. The second TA belongs to the second TAG, or the second TA is the TA value corresponding to the second TAG. For relevant descriptions of TA and TAG, please refer to the terminology explanation section and will not be repeated here.

Wherein, the network device A may be the network device 1 shown in FIG. 2A or FIG. 2B, and the corresponding network device B may be the network device 2 shown in FIG. 2A or FIG. 2B. In this case, the first TA is larger than the second TA. TA, the TA in the first TAG is greater than the TA in the second TAG; alternatively, the network device A can also be the network device 2 shown in Figure 2A or Figure 2B, and the corresponding network device B can be the network device B shown in Figure 2A or Figure 2B. In the network device 1 shown, in this case, the first TA is smaller than the second TA, and the TA in the first TAG is larger than the TA in the second TAG.

It should be noted that the network device involved in S301 (that is, the network device that configures the first TA (or first TAG) and the second TA (or second TAG) for the terminal device) may be network device A, or may be network device A. Device B may also be a network device other than network device A and network device B, which is not limited in the embodiment of this application. Without special explanation, the following article will take as an example whether the network device involved in S301 is network device A or network device B.

It should be noted that when the network device configures the first TA and the second TA for the terminal device, it can be understood that the network device determines the first TA and the second TA; or, it can also be understood that the network device determines the first TA and the second TA, and sends the first TA and the second TA to the terminal device. If the network device configures the first TA and the second TA for the terminal device, it is understood that the network device determines the first TA and the second TA, then after determining the first TA and the second TA, the network device can also send the first TA and the second TA to the terminal device. The first TA and the second TA. Similarly, when the network device configures the first TAG and the second TAG for the terminal device, it can be understood that the network device determines the first TAG and the second TAG; or it can also be understood that the network device determines the first TAG and the second TAG and sends the information to the terminal device. The terminal device sends the first TAG and the second TAG. If the network device configures the first TAG and the second TAG for the terminal device, it is understood that the network device determines the first TAG and the second TAG, then after determining the first TAG and the second TAG, the network device can also send the third TAG to the terminal device. One TAG and the second TAG. In Figure 3, it is taken as an example that the network device configures the first TA and the second TA for the terminal device, determines the first TA and the second TA for the network device, and sends the first TA and the second TA to the terminal device.

Taking the network device involved in S301 as network device A and the network device configuring the first TA and the second TA for the terminal device as an example, the network device can configure the first TA for the terminal device in the following manner: the network device receives the third TA from the terminal device. A preamble, the first TA is determined based on the first preamble, and the first TA is sent to the terminal device, for example, the first TA is sent to the terminal device through a first random access response message. Further, the network device may configure the second TA for the terminal device in the following manner: the network device receives the second preamble (or the signal strength of the second preamble) from network device B, and according to the second preamble (or the signal strength of the second preamble) (signal strength) determines the second TA and sends the second TA to the terminal device. For example, the network device sends the second TA to the terminal device through a second random access response message; or the network device receives the second TA from network device B. Two TAs are sent to the terminal device. For example, the network device sends the second TA to the terminal device through a second random access response message. The second preamble is the preamble sent by the terminal device to network device B. For example, network device B receives the second preamble from the terminal device and can send the second preamble (or the signal strength of the second preamble) to the network device; or, network device B receives the second preamble from the terminal device. , the second TA can be determined according to the second preamble, and the second TA can be sent to the network device. It should be understood that the specific implementation process of the network device configuring the first TA and the second TA for the terminal device in the embodiment of the present application is not limited to this.

It should be noted that the network device can first send the first TA to the terminal device, and then send the second TA to the terminal device; or it can also first send the second TA to the terminal device, and then send the first TA to the terminal device; or it can also Send the first TA and the second TA to the terminal device at the same time. In addition, the first random access response message and the second random access response message may be the same message or different messages, which is not limited in the embodiment of the present application.

It should be noted that for the specific implementation process of the network device configuring the first TAG and the second TAG for the terminal device, please refer to the related content of the network device configuring the first TA and the second TA for the terminal device, which will not be described again here.

S302: The terminal device sends the second message to the network device, and accordingly, the network device receives the second message.

S302 is an optional step, represented by a dotted line in Figure 3 . The second message includes capability information of the terminal device. The capability information may include one or more of the following information.

Information 1 can be used to indicate whether the terminal device supports sending data on two carriers at different times. During the transmission of one of the two carriers, the other of the two carriers has completed the radio frequency link. Adjustment; or, used to indicate that the terminal device supports sending data on two carriers at different times. During the transmission of one of the two carriers, the other of the two carriers has completed the radio frequency link. Adjustment.

Whether the terminal equipment supports sending data on two carriers at different times, during the transmission of one of the two carriers, the other of the two carriers has completed the adjustment of the radio frequency link, which can also be understood as, Whether the terminal equipment supports communication through radio frequency links other than the radio frequency link before the handover of a radio frequency link is completed; or, it can also be understood as whether the terminal equipment supports communication through radio frequency links other than the radio frequency link during the handover process of a radio frequency link. The one radio frequency link is external to the radio frequency link for communication.

For example, the terminal equipment has completed the adjustment of radio frequency link 1 but has not completed the adjustment of radio frequency link 2. If the information 1 indicates that the terminal equipment supports the use of radio frequency links other than the radio frequency link before the switching of one radio frequency link is completed, channel to communicate, then the terminal device can communicate through the adjusted radio frequency link 1 while adjusting radio frequency link 2. For another example, the terminal equipment has completed the adjustment of radio frequency link 1 but has not completed the adjustment of radio frequency link 2. If the information 1 indicates that the terminal equipment does not support switching through a radio frequency link other than that one before the switching of one radio frequency link is completed. RF link to communicate, then the terminal device cannot communicate through the adjusted RF link 1 while adjusting RF link 2. Instead, it needs to wait for the adjustment of RF link 2 to be completed, and complete the adjustment of RF link 2. Adjusted to allow communication via RF Link 1.

It should be noted that the terminal device communicates through the radio frequency link, which can be understood as the terminal device transmits data, control information and other information through the radio frequency link. The following article takes the terminal device transmitting data through the radio frequency link as an example.

Information 2 can be used to indicate whether the terminal device supports or needs to wait for communication through the radio frequency link after the switching of other radio frequency links other than the radio frequency link is completed after the switching of the radio frequency link is completed; or, It is used to instruct the terminal device to support or need to wait for the completion of switching of other radio frequency links except the one radio frequency link to communicate through the one radio frequency link after the switching of one radio frequency link is completed. Taking RF link 1 and RF link 2 as an example, if information 2 indicates that the terminal device needs to wait for other RF links except the first RF link to complete the switch after completing the switch, then pass the If one radio frequency link is used for communication, then when the handover of radio frequency link 1 is completed but the handover of radio frequency link 2 is not completed, the terminal device needs to communicate through radio frequency link 1 after the handover of radio frequency link 2 is completed. If information 2 indicates that the terminal device does not need to wait for other radio frequency links except the first radio frequency link to complete the switching before communicating through the radio frequency link, then the radio frequency link 1. When the switching of RF link 2 is completed but the switching of radio frequency link 2 is not completed, the terminal device can communicate through the radio frequency link 1. There is no need to wait for the completion of the switching of radio frequency link 2 before communicating through the radio frequency link 1.

Information 3 can be used to indicate whether the terminal equipment supports switching between multiple carriers corresponding to different TAs; or, to indicate whether the terminal equipment supports switching between multiple carriers corresponding to different TAs. For example, whether the terminal device supports carrier switching between the carrier corresponding to the first TA and the carrier corresponding to the second TA. In this embodiment, it is taken as an example that the terminal device supports switching between multiple carriers corresponding to different TAs. Among them, whether the terminal equipment supports switching between multiple carriers corresponding to different TAs can be replaced by whether the terminal equipment supports switching between multiple carriers corresponding to different TAGs.

Optionally, this information 3 can also be used to indicate whether the terminal device supports different TAs of uplink transmission carriers sent in parallel at the same time unit. For example, information 3 indicates that the terminal device supports uplink transmissions that are sent in parallel at the same time unit. The carriers have different TAs. Then, when the terminal device performs parallel transmission through carrier 1 and carrier 2, the TA corresponding to carrier 1 corresponds to the carrier 2. The TA is different. For another example, information 3 indicates that the terminal equipment does not support uplink transmissions sent in parallel at the same time unit. The carriers have different TAs. Then, when the terminal equipment performs parallel transmission through carrier 1 and carrier 2, the TA corresponding to carrier 1 is different from the carrier. 2 corresponds to the same TA.

Through the above information 3, in the process of multiple carrier switching, it is possible to consider terminal equipment with lower capabilities that do not support switching between multiple carriers corresponding to different TAs, or to support switching between multiple carriers corresponding to different TAs. Terminal equipment with higher capabilities for handover can improve compatibility and system spectrum utilization.

Information 4 may be used to indicate whether the terminal device supports parallel transmission on multiple carriers according to the third value; or, it may be used to indicate whether the terminal device supports parallel transmission on multiple carriers according to the third value. For example, this information 4 can be used to indicate whether the terminal device supports parallel transmission on multiple carriers according to the third value when switching between multiple frequency bands. For example, a terminal device with a lower chip does not support parallel transmission on multiple carriers according to the third value; a terminal device with a higher chip supports parallel transmission on multiple carriers according to the third value. For the description of the third value, please refer to the terminology explanation section and will not be repeated here.

Correspondingly, when the network device performs dynamic scheduling, in addition to the scheduling delay, it also needs to indicate dynamic switching based on the state transition delay. When switching carriers between different frequency bands, the radio frequency link needs to load some parameters related to the frequency band first, because the time introduced by this loading is called state transition delay. The scheduling delay is the time from receiving or detecting downlink control information (downlink control information, DCI) until the uplink data is sent.

Optionally, the state transition delay can be the product of N and the first state transition value (for example, recorded as Tstate_transfer_1), where Tstate_transfer_1 is 300us, 400us, or 500us, etc., and N is a positive integer. Optionally, the state transition delay can also be the second state transition value (for example, recorded as Tstate_transfer_2), where Tstate_transfer_2 is 500us, 1000us or 1500us, etc. The terminal device can send the state transition delay to the network device. After receiving the state transition delay, the network device needs to add the state transition delay to the scheduling delay K2 as the new uplink scheduling delay.

Information 5 may be used to indicate whether the terminal device supports a common frequency band between the first frequency band and the second frequency band; or, it may be used to indicate whether the terminal device supports a common frequency band between the first frequency band and the second frequency band. The first frequency band is a frequency band where one carrier before carrier switching is located, or one or more frequency bands where multiple carriers before carrier switching are located. The second frequency band is a frequency band where one carrier is located after carrier switching, or one or more frequency bands where multiple carriers are located after carrier switching. Wherein, there is a common frequency band between the first frequency band and the second frequency band, which can be understood as the first frequency band and the second frequency band are the same, or it can also be understood as part of the first frequency band and part or all of the second frequency band. Overlapping (or identical). Or it can also be understood that all the frequency bands in the first frequency band overlap (or are the same) with part or all of the frequency bands in the second frequency band. The first frequency band can be replaced with a first frequency band group, and the second frequency band can be replaced with a second frequency band group.

Exemplarily, there are one or more common frequency bands among the one or more frequency bands used by the terminal device when transmitting data in the first time unit and the one or more frequency bands used when transmitting data in the second time unit. The first time unit and the second time unit are two consecutive time units. For example, the terminal equipment transmits through carrier 1 and carrier 4 in the first time slot, the frequency band where carrier 1 is located is frequency band A, and the frequency band where carrier 4 is located is frequency band B; in the second time slot, the terminal equipment transmits through carrier 2 and carrier 4. 3 for transmission, the frequency band where carrier 2 is located is frequency band B, and the frequency band where carrier 3 is located is frequency band C. The terminal equipment uses the carrier of frequency band B for data transmission in both the first time slot and the second time slot.

Information 6 can be used to indicate whether the terminal device supports the configured fallback frequency band (can be recorded as anchor band); or, it can be used to indicate whether the terminal device supports the configured fallback frequency band.

The fallback frequency band is a frequency band defined when switching between multiple frequency bands. For example, the terminal device sends information 6 to the network device. The information 6 indicates that the terminal device supports the configured fallback frequency band; accordingly, the network device can configure the fallback frequency band for the terminal device according to the information 6. For example, configuring the fallback frequency band for the terminal device is The frequency band where carrier 1 is located (for example, recorded as frequency band A). Furthermore, when the terminal equipment switches from carrier 4 to carrier 3, the terminal equipment can first switch the frequency band where the radio frequency link applied to carrier 4 is located to frequency band A, and then switch the radio frequency link from frequency band A to the frequency band where carrier 3 is located. frequency band.

Information 7 can be used to indicate whether the terminal equipment supports carrier switching (carrier switching) in response to the sounding reference signal (SRS) when switching between multiple frequency bands; or, it can be used to indicate when the terminal equipment switches between multiple frequency bands. , supports responding to SRS carrier switching; or, is used to instruct the terminal device to support providing dedicated storage space for SRS carrier switching when switching between multiple frequency bands; or is used to instruct the terminal device to support when switching between multiple frequency bands. Provide dedicated storage space for SRS carrier switching. Among them, the storage space is a radio frequency-related storage space.

In the SRS carrier switching mechanism, SRS is allowed to switch among non-uplink carriers to obtain the channel conditions of the downlink carrier. The hardware capabilities of terminal devices are usually fixed, and the amount of storage space that can be carried is also predetermined. If information 7 indicates that the terminal device supports responding to SRS carrier switching when switching between multiple frequency bands, it means that the terminal device can provide dedicated storage space for SRS carrier switching, allowing the terminal device to perform uplink transmission between multiple frequency bands in one time slot. When switching, perform SRS carrier switching. If information 7 indicates that the terminal device does not support SRS carrier switching when switching between multiple frequency bands, it means that the terminal device cannot perform SRS carrier switching when switching uplink transmission between multiple frequency bands within a time slot. In the embodiment of this application, the terminal device can send information 7 to the network device, so that the network device can instruct the terminal device to switch frequency bands based on the information 7 to ensure that the terminal device takes into account SRS carrier switching and uplink transmission switching between multiple frequency bands.

It should be noted that the "support" in the above information 1, information 2, information 3, information 4, information 5, information 6 and information 7 can be replaced by "can (or can)", "expect" or "need", etc. Terminology; accordingly, "whether it is supported" can be replaced by terms such as "whether it is possible (or whether it is possible)", "whether it is expected" or "whether it is needed". Also, the "frequency band" in the above-mentioned information 4, information 5, information 6 and information 7 can be replaced with "frequency band".

It should be noted that the time unit may be a time slot, a subframe, a mini-slot, a mini-subframe, etc., which are not limited in the embodiments of this application.

S303: The network device sends the first message to the terminal device, and accordingly, the terminal device receives the first message.

The network device may send a first message to the terminal device. The first message may be, for example, radio resource control (RRC), MAC message, DCI, etc. The embodiment of the present application does not limit the specific implementation form of the first message. For example, the network device may determine that the terminal device switches carriers, and send the first message to the terminal device. For example, a network device can periodically or Aperiodically determine whether the terminal device needs to switch carriers. For example, the network device can determine whether the terminal device needs to switch carriers based on the measurement report information. The measurement report information may include information such as channel status and/or signal strength. The embodiments of the present application do not limit the content of the measurement report information. For example, if the current channel status is poor and/or the signal strength is poor, the network device may determine that the terminal device switches the carrier. For another example, if the current channel status is good and the current signal strength is good, the network device can determine that the terminal device does not switch carriers. In this embodiment, the network device determines that the terminal device switches carriers as an example. In addition, the measurement report information may be information measured by the network device, or may be information measured by the terminal device, which is not limited in the embodiments of this application. It should be understood that the embodiments of the present application do not limit the specific implementation manner in which the network device determines that the terminal device switches carriers.

The network device may determine whether the terminal device switches carriers based on the measurement report information. In another possible implementation, the network device receives a second message from the terminal device, and can determine whether the terminal device switches carriers based on the second message, or determines whether the terminal device switches carriers based on the second message and the measurement report information. . It should be understood that the embodiment of the present application is not limited to the specific implementation manner in which the network device determines whether the terminal device switches carriers. For the description of the second message, please refer to the relevant content of S302, which will not be described again here.

In a possible implementation, the terminal device sends the second message to the network device, and accordingly, the network device receives the second message. Optionally, the network device may send the first message to the terminal device according to the second message. For the description of the second message, please refer to the relevant content of S302, which will not be described again here.

In this embodiment of the present application, the first message may cause (or trigger) the terminal device to switch from the first carrier set to the second carrier set. The first carrier set includes a first carrier (which may be noted as C1), and the second carrier set includes a second carrier (which may be noted as C2) and a third carrier (which may be noted as C3); or, the first carrier set includes a second carrier and a third carrier, the second carrier set includes the first carrier; or, the first carrier set includes the first carrier and the fourth carrier (can be recorded as C4), and the second carrier set includes the second carrier and the third carrier.

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the second TA. That is, the first carrier and the third carrier correspond to the same TA, and the second carrier and the fourth carrier correspond to the same TA. The first TA and the second TA may be the same or different, and this is not limited in the embodiments of the present application. In order to facilitate understanding of the embodiments of the present application, the following description takes the first TA and the second TA as different examples.

Alternatively, the first carrier corresponds to the first TAG, the second carrier corresponds to the second TAG, and the third carrier corresponds to the first TAG. The fourth carrier corresponds to the second TAG. That is, the first carrier and the third carrier correspond to the same TAG, and the second carrier and the fourth carrier correspond to the same TAG. Among them, the first TA belongs to the first TAG, or the first TA is the TA value corresponding to the first TAG. The second TA belongs to the second TAG, or the second TA is the TA value corresponding to the second TAG.

It should be noted that the first carrier set includes the first carrier, which can be understood to mean that the first carrier set at least includes the first carrier. That is, in addition to the first carrier, the first carrier set may also include at least one other carrier. The other carrier may correspond to the first TA, the second TA, or may be in addition to the first TA and the second TA. TAs other than TA are not limited in the embodiments of this application. The second carrier set includes the second carrier and the third carrier, which may be understood to mean that the second carrier set at least includes the second carrier and the third carrier. That is, in addition to the second carrier and the third carrier, the second carrier set may also include at least one other carrier. The TA corresponding to the other carrier may be the first TA, the second TA, or the TA in addition to the third carrier. TAs other than the first TA and the second TA are not limited in the embodiments of this application.

Alternatively, the first carrier set includes the second carrier and the third carrier, which may be understood to mean that the first carrier set at least includes the second carrier and the third carrier. That is, in addition to the second carrier and the third carrier, the first carrier set may also include at least one other carrier. The TA corresponding to the other carrier may be the first TA, the second TA, or the TA in addition to the third carrier. TAs other than the first TA and the second TA are not limited in the embodiments of this application. The second carrier set includes the first carrier, which may be understood to mean that the second carrier set at least includes the first carrier. That is, in addition to the second carrier, the second carrier set may also include at least one other carrier. The other carrier may correspond to the first TA, the second TA, or may be in addition to the first TA and the second TA. TAs other than TA are not limited in the embodiments of this application.

Alternatively, the first carrier set includes the first carrier and the fourth carrier, which may be understood to mean that the first carrier set at least includes the first carrier and the fourth carrier. That is, in addition to the first carrier and the fourth carrier, the first carrier set may also include at least one other carrier. The TA corresponding to the other carrier may be the first TA, the second TA, or other than the first TA. TAs other than the first TA and the second TA are not limited in the embodiments of this application. For a description of the second carrier set including the second carrier and the third carrier, please refer to the above description and will not be described again here.

It should be noted that the first carrier corresponds to the first TA, which can be understood to mean that the TA when the terminal device and the network device communicate through the first carrier is the first TA. The first carrier corresponds to the first TAG, which can be understood to mean that the TA when the terminal device and the network device communicate through the first carrier belongs to the first TAG. Similarly, the second carrier corresponds to the second TA, which can be understood to mean that the TA when the terminal device and the network device communicate through the second carrier is the second TA. The second carrier corresponds to the second TAG, which can be understood to mean that the TA when the terminal device and the network device communicate through the second carrier belongs to the second TAG. The third carrier corresponds to the first TA, which can be understood as the connection between the terminal equipment and the network. The TA when network devices communicate through the third carrier is the third TA. The third carrier corresponds to the first TAG, which can be understood to mean that the TA when the terminal device and the network device communicate through the third carrier belongs to the first TAG. The fourth carrier corresponds to the second TA, which can be understood to mean that the TA when the terminal device and the network device communicate through the fourth carrier is the second TA. The fourth carrier corresponds to the second TAG, which can be understood to mean that the TA when the terminal device and the network device communicate through the fourth carrier belongs to the second TAG.

For ease of understanding, the embodiment of this application is described by taking the first carrier corresponding to the first TA, the second carrier corresponding to the second TA, the third carrier corresponding to the first TA, and the fourth carrier corresponding to the second TA as an example.

For example, the first message may instruct (or trigger) the terminal device to switch from the first carrier set to the second carrier set through one or more of the following methods.

Method 1: The first carrier set includes the first carrier, the second carrier set includes the second carrier and the third carrier, and the first message can trigger the terminal device to switch from the first carrier set to the second carrier set. Specifically, the first message may instruct the terminal device to switch from the first carrier to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, or the first message may indicate (or include) the first identifier, or the first message may indicate the terminal The device switches from the first carrier to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set and indicates the first identifier.

In this method one, the terminal equipment switches from the first carrier set to the second carrier set, which can be understood as the terminal equipment switches from the first carrier to the second carrier or the third carrier; or, it can be understood that the terminal equipment switches from the first carrier to the second carrier. is activated, the second carrier is deactivated, and the third carrier is deactivated, switching to a state where the first carrier is deactivated, the second carrier is activated, and the third carrier is activated; or, it can be understood that the terminal equipment switches from the state of passing the first carrier to The state of data transmission is switched to the state of data transmission through the second carrier and the third carrier.

In this method one, the terminal equipment switches from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, which can be understood as the terminal equipment switches the frequency corresponding to the first radio frequency link applied to the first carrier to (or adjusts to) the frequency of the carrier corresponding to the minimum TA in the second carrier set, and switching the frequency corresponding to the second radio frequency link of the terminal device to the frequency of a carrier in the second carrier set other than the carrier corresponding to the minimum TA; or, It can be understood that the terminal equipment switches from the first carrier to the carrier corresponding to the smallest TA in the second carrier set for uplink transmission; or, it can be understood that the terminal equipment switches the frequency band (or frequency band) where the first radio frequency link is located to the second carrier. The frequency band (or frequency band) where the carrier corresponding to the smallest TA in the set is located, and switching the frequency band (or frequency band) where the second radio frequency link is located to the frequency band where a carrier other than the carrier corresponding to the smallest TA is located in the second carrier set ( or frequency band).

Similarly, when the terminal equipment switches from the first carrier to the carrier corresponding to the maximum TA in the second carrier set, it can be understood that the terminal equipment switches the frequency corresponding to the first radio frequency link applied to the first carrier to the maximum TA in the second carrier set. The frequency of the carrier corresponding to the TA, and switching the frequency corresponding to the second radio frequency link of the terminal equipment to the frequency of a carrier in the second carrier set except the carrier corresponding to the largest TA; or, it can be understood that the terminal equipment switches from the first The carrier switches to the carrier corresponding to the largest TA in the second carrier set for uplink transmission; or, it can be understood that the terminal device switches the frequency band (or frequency band) where the first radio frequency link is located to the carrier corresponding to the largest TA in the second carrier set. frequency band (or frequency band), and switching the frequency band (or frequency band) where the second radio frequency link is located to the frequency band (or frequency band) where a carrier in the second carrier set other than the carrier corresponding to the largest TA is located. The frequency can be replaced by a frequency point.

It should be noted that in this method one, the second carrier set includes the second carrier and the third carrier, then a carrier in the second carrier set other than the carrier corresponding to the smallest TA can be understood as the largest carrier in the second carrier set. The carrier corresponding to TA. Similarly, a carrier in the second carrier set other than the carrier corresponding to the largest TA can be understood as the carrier corresponding to the smallest TA in the second carrier set.

It should be noted that the frequency of the carrier involved in the embodiment of the present application can be understood as the frequency of the frequency band in which the carrier is located. For example, the frequency of the first carrier can be understood as the frequency of the frequency band in which the first carrier is located.

As an example, the first message may instruct the terminal device to switch from the first carrier to a carrier corresponding to the minimum TA or the maximum TA in the second carrier set. For example, the value of the first message may be used to instruct the terminal device to switch from the first carrier to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set. For example, the value of the first message is 00, and the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set. For another example, the value of the first message is 01, and the first message may instruct the terminal device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set. It should be understood that the embodiment of the present application is not limited to the specific implementation of the first message instructing the terminal device to switch from the first carrier to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set.

As an example, the first identifier in the first message may be the identifier of a TA corresponding to a carrier in the second carrier set, or the identifier of a TAG to which a TA corresponding to a carrier in the second carrier set belongs. For ease of understanding, the following description takes an example in which the first identifier is an identifier of a TA corresponding to a carrier in the second carrier set. For example, the first identifier is the identifier of the second TA. For another example, the first identifier is the identifier of the first TA.

As another example, the first message instructs the terminal device to switch from the first carrier to a carrier corresponding to the minimum TA or the maximum TA in the second carrier set and includes the first identifier. For example, if the first TA is larger than the second TA, the first message may instruct the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first identifier in the first message is that of the second TA. identification; alternatively, the A message instructs the terminal device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and the first identifier in the first message is the identifier of the first TA. For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first identifier in the first message is the first TA. or, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and the first identifier in the first message is the identifier of the second TA.

In a possible implementation manner, the first message may also indicate the carrier for which the first switching interval (which may be recorded as GAP1) is configured. The first switching interval may be the length of time the carrier is interrupted during the switching process between the two carriers. Through this implementation, the terminal device can determine the carrier that needs to be interrupted due to adjustment of the radio frequency link or the like in the carrier switching process based on the first message. For example, the first message may indicate that the first switching interval is configured on the carrier before carrier switching, or indicate that the first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, or indicate that the first switching interval The first part (can be recorded as GAP1_1) is configured on the carrier before carrier switching and the remaining part except the first part (can be recorded as GAP1_2) in the first switching interval is configured on the maximum TA of the second carrier set on the corresponding carrier. It should be understood that in this method one, the carrier before carrier switching is the first carrier.

For example, if the first TA is larger than the second TA, the first message may instruct the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and indicate that the first switching interval is configured on the carrier before the carrier switch. .

For example, if the first TA is larger than the second TA, the first message may instruct the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and indicate that the first switching interval is configured in the smallest TA in the second carrier set. The carrier corresponding to TA.

For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and indicate that the first switching interval is configured on the carrier before the carrier switching. superior.

For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and indicate that the first switching interval is configured in the second carrier set. The carrier corresponding to the minimum TA.

For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and indicate that the first part of the first switching interval is configured in On the carrier before carrier switching, the remainder of the first switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set.

It should be noted that the first message in the embodiment of this application may be one message or multiple messages. Correspondingly, the information indicated by the first message may be included in one message or in multiple messages. For example, the first message is two messages. One of the two messages can be used to instruct the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the other message can be used to indicate the first switching interval. Configured on the carrier before carrier switching.

Through the above method 1, the network device can instruct the terminal device to switch from the first carrier to the second carrier or to the third carrier through TA related information (such as the maximum TA, or the minimum TA, or the TA identification). Furthermore, the network device may also indicate the carrier to which the first switching interval is configured during the carrier switching process through TA related information.

Method 2: The first carrier set includes the second carrier and the third carrier, the second carrier set includes the first carrier, and the first message can trigger the terminal device to switch from the first carrier set to the second carrier set. Specifically, the first message may instruct the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, or the first message may indicate (or include) the second identifier, or the first message may indicate the terminal The device switches from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier and indicates the second identifier.

In this second method, the terminal equipment switches from the first carrier set to the second carrier set, which can be understood as the terminal equipment switches from the second carrier or the third carrier to the first carrier; or, it can be understood as the terminal equipment switches from the second carrier is activated, the third carrier is activated and the first carrier is deactivated, and the state switches to a state where the second carrier is deactivated, the third carrier is deactivated, and the first carrier is activated; or, it can be understood that the terminal device switches from passing through the second carrier to The state of data transmission with the third carrier is switched to the state of data transmission with the first carrier.

In this second method, the terminal device switches from the carrier corresponding to the smallest TA in the first carrier set to the first carrier. It can be understood that the terminal device will apply the frequency corresponding to the radio frequency link of the carrier corresponding to the smallest TA in the first carrier set. Switch to the frequency of the first carrier, and close the radio frequency link applied to the carriers in the first carrier set except the carrier corresponding to the smallest TA; alternatively, it can be understood that the terminal device switches from the carrier corresponding to the smallest TA in the first carrier set to the The first carrier is switched for uplink transmission; or, it can be understood that the terminal equipment switches the frequency band (or frequency band) of the radio frequency link of the carrier corresponding to the smallest TA in the first carrier set to the frequency band (or frequency band) of the first carrier, and turning off radio frequency links applied to carriers in the first carrier set except the carrier corresponding to the smallest TA.

Similarly, when the terminal device switches from the carrier corresponding to the largest TA in the first carrier set to the first carrier, it can be understood that the terminal device switches the frequency corresponding to the radio frequency link applied to the carrier corresponding to the largest TA in the first carrier set to the first carrier. The frequency of a carrier, and closing the radio frequency links of carriers in the first carrier set except the carrier corresponding to the largest TA; or, it can be understood as the terminal device switching from the carrier corresponding to the largest TA in the first carrier set to the first carrier Perform uplink transmission; alternatively, it can be understood as the terminal device concentrating the maximum amount of the first carrier Switch the frequency band (or frequency band) where the radio frequency link of the carrier corresponding to the TA is located to the frequency band (or frequency band) where the first carrier is located, and close the radio frequency link applied to the carriers in the first carrier set except the carrier corresponding to the largest TA .

It should be noted that in this method 2, the first carrier set includes the second carrier and the third carrier, then the carriers in the second carrier set except the carrier corresponding to the minimum TA can be understood as the maximum TA in the second carrier set corresponding carrier. Similarly, the carriers in the second carrier set other than the carrier corresponding to the largest TA can be understood as the carrier corresponding to the smallest TA in the second carrier set.

As an example, the first message may instruct the terminal device to switch to the first carrier from a carrier corresponding to the minimum TA or the maximum TA in the first carrier set. For example, the value of the first message may be used to instruct the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set. For example, the value of the first message is 10, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier. For another example, the value of the first message is 11, and the first message may instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier. It should be understood that the embodiment of the present application is not limited to the specific implementation of the first message instructing the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier.

As an example, the second identifier in the first message may be an identifier of a TA corresponding to a carrier in the first carrier set, or an identifier of a TAG to which a TA corresponding to a carrier in the first carrier set belongs. For ease of understanding, the following description takes an example in which the second identifier is an identifier of a TA corresponding to a carrier in the first carrier set. For example, the second identifier is the identifier of the second TA. For another example, the second identifier is the identifier of the first TA.

As another example, the first message instructs the terminal device to switch from a carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier and includes the second identifier. For example, if the first TA is larger than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the second identifier in the first message is that of the second TA. identification; or, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the second identification in the first message is the identification of the first TA. For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the second identifier in the first message is the first TA. or, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the second identifier in the first message is the identifier of the second TA.

In a possible implementation, the first message may also indicate the carrier for which the first switching interval is configured. In this second method, the first switching interval is the time period for the terminal equipment to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier. Through this implementation, the terminal device can determine the carrier that needs to be interrupted due to adjustment of the radio frequency link or the like in the carrier switching process based on the first message. For example, the first message may indicate that the first switching interval is configured on the carrier after carrier switching, or indicates that the first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or indicates that the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set and the first part of the first switching interval is excepted The remaining part is configured on the carrier corresponding to the largest TA in the first carrier set, or indicates that the first part in the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set and the first switching interval The remaining parts except the first part are configured on the carrier after carrier switching. It should be understood that in the second method, the carrier after the carrier switching is the first carrier.

For example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and indicate that the first switching interval is configured in the first carrier set. On the carrier corresponding to the minimum TA.

For example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and indicate that the first switching interval is configured on the carrier after the carrier switch. superior.

For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and indicate that the first switching interval is configured in the first carrier set. on the carrier corresponding to the maximum TA.

For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and indicate that the first switching interval is configured after the carrier switching. on the carrier.

For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and indicate that the first part of the first switching interval is It is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier corresponding to the largest TA in the first carrier set.

For another example, if the first TA is larger than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and indicate that the first part of the first switching interval is configured in the first carrier. On the carrier corresponding to the smallest TA in a carrier set, the remainder of the first switching interval except the first part is configured on the carrier after carrier switching.

Through the above second method, the network device can instruct the terminal device to switch from the second carrier or the third carrier to the first carrier through TA related information (such as the maximum TA, or the minimum TA, or the TA identification). Furthermore, the network device may also indicate the carrier to which the first switching interval is configured during the carrier switching process through TA related information.

Method 3: The first carrier set includes the first carrier and the fourth carrier, and the second carrier set includes the second carrier and the third carrier. The first message can trigger the terminal device to switch from the first carrier to the second carrier, and from the fourth carrier to the second carrier. Switch to the third carrier, or trigger the terminal equipment to switch from the first carrier to the third carrier, or from the fourth carrier to the second carrier. Specifically, the first message may instruct the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the carrier corresponding to the minimum TA or maximum TA in the second carrier set, or the first message may indicate (or include) The third identification and the fourth identification, or the first message instructs the terminal equipment to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set and includes the third identification and Fourth logo.

The first message instructs the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set. It can be understood that the first message instructs the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the second carrier set. The carrier corresponding to the smallest TA in one carrier set is switched to the carrier corresponding to the smallest TA in the second carrier set; or it can be understood that the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the second carrier set. The carrier corresponding to the maximum TA; or it is understood that the first message instructs the terminal equipment to switch from the carrier corresponding to the maximum TA in the first carrier set to the carrier corresponding to the minimum TA in the second carrier set; or it is understood that the first message instructs the terminal equipment Switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set.

Optionally, the first message may also instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and to switch to the carrier corresponding to the largest TA in the first carrier set. The carrier corresponding to the largest TA in the second carrier set; or, the terminal device may be instructed to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the smallest TA in the first carrier set corresponds to The carrier is switched to the carrier corresponding to the largest TA in the second carrier set.

In this third method, the terminal equipment switches from the first carrier set to the second carrier set, which can be understood as the terminal equipment switches from the first carrier to the second carrier, and from the fourth carrier to the third carrier; or, it can be understood that It means that the terminal equipment switches from the first carrier to the third carrier, and from the fourth carrier to the second carrier; or, it can be understood that the terminal equipment is activated from the first carrier, the fourth carrier is activated, the second carrier is deactivated, and The state in which the third carrier is deactivated switches to the state in which the first carrier is deactivated, the fourth carrier is deactivated, the second carrier is activated, and the third carrier is activated; or, it can be understood that the terminal equipment switches from the state where the first carrier and the fourth carrier are activated. The state of the carrier for data transmission is switched to the state of data transmission through the second carrier and the third carrier.

In this third method, the first carrier set includes two carriers, and the second carrier set includes two carriers. The terminal equipment switches from the carrier corresponding to the minimum TA in the first carrier set to the carrier corresponding to the minimum TA in the second carrier set (or the terminal equipment switches from the carrier corresponding to the maximum TA in the first carrier set to the maximum TA in the second carrier set) carrier), it can be understood that the terminal device switches the frequency corresponding to the radio frequency link applied to the carrier corresponding to the smallest TA in the first carrier set to (or adjusts) the frequency corresponding to the carrier corresponding to the smallest TA in the second carrier set, and Switch the frequency corresponding to the radio frequency link applied to the carrier corresponding to the maximum TA in the first carrier set to the frequency of the carrier corresponding to the maximum TA in the second carrier set; or, it can be understood that the terminal device switches from the minimum TA in the first carrier set The corresponding carrier switches to the carrier corresponding to the smallest TA in the second carrier set for uplink transmission, and switches from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set for uplink transmission; or, it can be It is understood that the terminal device switches the frequency band (or frequency band) of the radio frequency link applied to the carrier corresponding to the smallest TA in the first carrier set to the frequency band (or frequency band) of the carrier corresponding to the smallest TA in the second carrier set, and switches The frequency band (or frequency band) applied to the carrier corresponding to the largest TA in the first carrier set is switched to the frequency band (or frequency band) where the carrier corresponding to the largest TA in the second carrier set is located.

Similarly, the terminal device switches from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set (or the terminal device switches from the carrier corresponding to the largest TA in the first carrier set to the second carrier set). The carrier corresponding to the smallest TA) can be understood as the terminal device switches the frequency corresponding to the radio frequency link applied to the carrier corresponding to the smallest TA in the first carrier set to the frequency of the carrier corresponding to the largest TA in the second carrier set, and applies The frequency corresponding to the radio frequency link of the carrier corresponding to the largest TA in the first carrier set is switched to the frequency corresponding to the carrier corresponding to the smallest TA in the second carrier set; or, it can be understood that the terminal equipment switches from the frequency corresponding to the smallest TA in the first carrier set to The carrier is switched to the carrier corresponding to the largest TA in the second carrier set for uplink transmission, and the carrier is switched from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set for uplink transmission; or, it can be understood as The terminal equipment switches the frequency band (or frequency band) of the radio frequency link applied to the carrier corresponding to the smallest TA in the first carrier set to the frequency band (or frequency band) of the carrier corresponding to the largest TA in the second carrier set, and applies the The frequency band (or frequency band) where the radio frequency link of the carrier corresponding to the largest TA in the first carrier set is located is switched to the frequency band (or frequency band) where the carrier corresponding to the smallest TA in the second carrier set is located. The frequency can be replaced by a frequency point.

As an example, the first message may instruct the terminal device to switch from a carrier corresponding to the minimum TA or the maximum TA in the first carrier set to a carrier corresponding to the minimum TA or the maximum TA in the second carrier set. For example, the value of the first message may be used to instruct the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set. For example, the value of the first message is 00, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. For example, the value of the first message is 01, and the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set. For another example, the value of the first message is 10, and the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. For another example, the value of the first message is 11, and the first message may instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set. It should be understood that the embodiment of the present application does not include the specific implementation of the first message instructing the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the carrier corresponding to the minimum TA or maximum TA in the second carrier set. It is not limited to this.

As an example, the first message includes a third identification and a fourth identification. The third identifier may be an identifier of a TA corresponding to a carrier in the first carrier set, or an identifier of a TAG to which a TA corresponding to a carrier in the first carrier set belongs. The fourth identifier may be an identifier of a TA corresponding to a carrier in the second carrier set, or an identifier of a TAG to which a corresponding TA in the second carrier set belongs. For ease of understanding, the following description will take the example that the third identifier is the identifier of the TA corresponding to a carrier in the first carrier set, and the fourth identifier is the identifier of the TA corresponding to a carrier in the second carrier set. For example, the third identifier is the identifier of the first TA, and the fourth identifier is the identifier of the second TA. For example, the third identifier is the identifier of the first TA, and the fourth identifier is the identifier of the first TA. For another example, the third identifier is the identifier of the second TA, and the fourth identifier is the identifier of the first TA. For another example, the third identifier is the identifier of the second TA, and the fourth identifier is the identifier of the second TA.

As yet another example, the first message instructs the terminal device to switch from a carrier corresponding to the minimum TA or the maximum TA in the first carrier set to a carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and includes a third identifier and a fourth identifier. . For example, if the first TA is larger than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the third identifier may be the second The identity of the TA. The fourth identity may be the identity of the second TA. For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the third identifier may be the The fourth identifier may be the identifier of one TA, and the fourth identifier may be the identifier of the second TA. The other situations are similar and will not be listed one by one here.

In a possible implementation manner, the first message may also indicate the carrier for which the second switching interval (which may be noted as GAP2) and the third switching interval (which may be noted as GAP3) are configured. The second switching interval is the duration during which the carrier is interrupted during switching from the first carrier to the second carrier, and the third switching interval is the duration during which the carrier is interrupted during switching from the fourth carrier to the third carrier. Alternatively, the second switching interval is the duration during which the carrier is interrupted during switching from the first carrier to the third carrier, and the third switching interval is the duration during which the carrier is interrupted during switching from the fourth carrier to the second carrier. Through this implementation, the terminal device can determine the carrier that needs to be interrupted due to adjustment of the radio frequency link or the like in the carrier switching process based on the first message. For example, the first message may indicate that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; or it may indicate the second switching. The interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set; or it is indicated that the second switching interval is configured on the largest TA in the first carrier set. On the carrier corresponding to TA, the first part of the third switching interval (can be recorded as GAP3_1) is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the third switching interval except the first part (can be recorded as GAP3_2) is configured on the carrier corresponding to the largest TA in the second carrier set; or indicates that the first part of the second switching interval (can be recorded as GAP2_1) is configured on the carrier corresponding to the smallest TA in the first carrier set above, the remainder of the second switching interval except the first part (which can be recorded as GAP2_2) is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the largest TA in the first carrier set. on the carrier corresponding to TA.

For example, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/or instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set. The carrier corresponding to the largest TA in the carrier set is switched to the carrier corresponding to the largest TA in the second carrier set. In this case, the first message may also indicate that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; Alternatively, the first message may also indicate that the second switching interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set.

For another example, if the first TA is larger than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the smallest TA in the second carrier set. The carrier switch corresponding to the largest TA in a carrier set Switch to the carrier corresponding to the smallest TA in the second carrier set. In this case, the first message may also indicate that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set.

For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the smallest TA in the second carrier set. The carrier corresponding to the largest TA in one carrier set is switched to the carrier corresponding to the smallest TA in the second carrier set. In this case, the first message may also indicate that the second switching interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set.

For another example, if the first TA is larger than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the smallest TA in the second carrier set. The carrier corresponding to the largest TA in one carrier set is switched to the carrier corresponding to the smallest TA in the second carrier set. In this case, the first message may also indicate that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set. on the carrier, and the remaining part in the third switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set.

For another example, if the first TA is smaller than the second TA, the first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the smallest TA in the second carrier set. The carrier corresponding to the largest TA in one carrier set is switched to the carrier corresponding to the smallest TA in the second carrier set. In this case, the first message may also indicate that the first part of the second switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set.

Through the above method three, the network device can instruct the terminal device to switch from the first carrier to the second carrier, and from the fourth carrier to the third carrier through the relevant information of the TA (such as the maximum TA, or the minimum TA, or the identification of the TA). Or switching from the first carrier to the third carrier, and from the fourth carrier to the second carrier. Furthermore, the network device may also indicate the carrier to which the first switching interval is configured during the carrier switching process through TA related information.

It should be noted that the execution sequence of S301, S302 and S303 in Figure 3 is only an example, and the embodiment of the present application is not limited thereto. For example, the network device can first configure the first TA and the second TA for the terminal device, and then send the first message to the terminal device; or, the network device can also configure the first TA and the second TA for the terminal device and at the same time, send the first message to the terminal device. The device sends the first message; or, the network device can also configure the first TA and the second TA for the terminal device after sending the first message to the terminal device, which is not limited in the embodiments of the present application. For another example, the network device may first configure the first TA and the second TA for the terminal device, and then receive the second message from the terminal device; or the network device may also configure the first TA and the second TA for the terminal device. At the same time, a second message is received from the terminal device; or, the network device can also configure the first TA and the second TA for the terminal device after receiving the second message from the terminal device, which is not limited in the embodiments of the present application.

S304: The terminal device switches from the first carrier set to the second carrier set according to the first message.

In S304, the terminal device may switch from the first carrier set to the second carrier set according to the first message. The first message may instruct the terminal device to switch from the first carrier set to the second carrier set through one or more of the aforementioned manner 1, 2 or 3. The following describes the specific implementation process of the terminal device switching from the first carrier set to the second carrier set for the first, second and third methods respectively.

For method 1: the first carrier set includes the first carrier, and the second carrier set includes the second carrier and the third carrier, the first message may instruct the terminal device to switch from the first carrier to the minimum TA or the maximum TA in the second carrier set. The corresponding carrier, and/or includes (or indicates) the first identifier. In this case, the terminal device switches from the first carrier to the second carrier or to the third carrier according to the first message. In Method 1, the carrier to which the first switching interval is configured during the carrier switching process may be indicated by the network device, or may be determined by the terminal device, which is not limited in this embodiment of the present application. For convenience of description, this embodiment of the present application takes the carrier for which the network device indicates that the first switching interval is configured as an example.

In a possible implementation, the first message may instruct the terminal device to switch from the first carrier to a carrier corresponding to the minimum TA or the maximum TA in the second carrier set. Correspondingly, the terminal device switches from the first carrier to the second carrier or to the third carrier according to the first message.

It should be noted that the terminal equipment can switch the frequency corresponding to the first radio frequency link to the frequency of the carrier corresponding to the smallest TA in the second carrier set within the first value, and switch the frequency corresponding to the second radio frequency link to the third The duration used by the frequency of the carrier corresponding to the largest TA in the two-carrier set may be the first value, or may be other values, which is not limited in this embodiment of the present application. Similarly, the terminal device can switch the frequency corresponding to the first radio frequency link to the frequency corresponding to the carrier with the largest TA in the second carrier set within the first value, and switch the frequency corresponding to the second radio frequency link to the second carrier. The duration occupied by the frequency of the carrier corresponding to the smallest TA in the concentration can be the first value, Or it can also be other values, which are not limited in the embodiments of this application. For the description of the first value, please refer to the terminology explanation section and will not be repeated here.

As an example, the first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and indicates that the first switching interval is configured on the carrier before the carrier switching. superior. In this case, the terminal device switches from the first carrier to the second carrier according to the first message. The first switching interval is configured on the first carrier. For example, the first switching interval may be located on a corresponding carrier of the first carrier. The end of the time slot (can be recorded as time slot 1). Optionally, the terminal device may determine that the first switching interval is the difference between the first value and the second value, as shown in Figure 4; or, the terminal device may determine that the first switching interval is the first value, as shown in Figure 5 Show.

The difference between the first value and the second value can be understood as the absolute value of the difference between the first value and the second value. The second value, which may also be called the TA difference, is the difference between the first TA and the second TA. For example, the second value may be the absolute value of the difference between the first TA and the second TA.

In a possible implementation, the terminal device may determine, according to information 1 (and/or information 2), that the first switching interval is the difference between the first value and the second value, or is the first value. In the embodiment of this application, the terminal device determines the value of the first switching interval based on information 1 as an example. It should be understood that when the terminal device determines the value of the first switching interval based on information 2 (or information 1 and information 2), please refer to The terminal device determines the relevant content of the value of the first switching interval based on the information 1.

For example, the information 1 indicates that the terminal device supports communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed. In this case, the terminal device can determine the first switching interval as based on the information 1. The difference between the first value and the second value, so that even if the terminal equipment has not completed the switching from the first carrier to the second carrier, the terminal equipment can start to pass the third carrier after time T2 (not shown in Figure 4) and before time T1. Carrier waves transmit data, which can improve data transmission efficiency and improve resource utilization. Among them, time T1 is the time when the terminal device starts transmitting data in time slot 2. Time T2 may be the completion time when the terminal device switches the second radio frequency link to the frequency of the third carrier. For example, time T2 may be a time between the starting time when the terminal device adjusts the first radio frequency link and time T1. For the convenience of description, in the following, when the first TA is larger than the second TA, time T2 is taken as the starting time of time slot 2 as an example.

For another example, the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed. In this case, the terminal device can determine the first switching based on the information 1. The interval is a first value, so that the terminal device can start transmitting data through the third carrier at the completion time of switching from the first carrier to the second carrier (i.e., the starting time of slot 2 or the end time of slot 1), which can improve data transmission efficiency and improve resource utilization.

It should be noted that if the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device can also determine that the first switching interval is the first value and the first value. The difference between the two values, in this case, the terminal device needs to start transmitting data through the second carrier and/or the third carrier at time T1.

It should be noted that the start time (or start time) of the terminal device transmitting data on the carrier can be determined by the terminal device itself (such as puncturing the data), or it can be determined by the network device based on information 1 , the embodiment of the present application does not limit this. For example, the first TA is larger than the second TA, information 1 indicates that the terminal device supports communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device sends information 1 to the network device, and the network After the device receives the information 1, the terminal device can be scheduled to transmit data on the third carrier at the starting time of the time slot 2 based on the information 1. For another example, the first TA is larger than the second TA, information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, and the terminal device sends information 1 to the network device. , after the network device receives the information 1, the terminal device can be scheduled to transmit data on the third carrier at time T1 according to the information 1.

In the example shown in Figure 4, the first TA is larger than the second TA, and the communication distance between the terminal device and the network device corresponding to the first TA (denoted as network device 1) is longer than the communication distance between the terminal device and the network device corresponding to the second TA. The communication distance between devices (recorded as network device 2) means that the terminal device needs more time in advance to transmit data on the first carrier or the third carrier. For example, the terminal device starts transmitting data on the first carrier or the third carrier at the beginning of time slot 2. Data is transmitted on three carriers, and data is transmitted on the second carrier starting at time T1. The difference between the starting time of time slot 2 and time T1 is equal to the difference between the first TA and the second TA, as shown in Figure 4. In this case, the terminal equipment can switch from the first carrier corresponding to the larger TA to the second carrier corresponding to the smaller TA. In this way, the TA difference between the two carriers can be used to compensate for the interruption of the carrier when the two carriers are switched. The duration is shortened from the duration that originally needs to interrupt the first value to the duration that is the difference between the first value and the second value, thereby reducing the duration that the terminal device interrupts data transmission on the carrier, and improving resource utilization. The head of a time slot is usually used to transmit control information, and the tail of a time slot is usually used to transmit data. The terminal equipment configures the first switching interval at the end of time slot 1, although the terminal equipment is interrupted through the first carrier in the The data transmission at the end of time slot 1 will not affect the transmission of control information through the first carrier in this time slot 1. Moreover, the terminal equipment configures the first switching interval on the carrier before carrier switching, which can avoid affecting the terminal equipment through the second carrier and the third carrier. The transmission of carrier control information enables the network device to timely schedule the data transmission of the terminal device on the second carrier and the third carrier.

In the above example shown in Figure 5, the terminal equipment switches from the first carrier corresponding to the larger TA to the second carrier corresponding to the smaller TA, although the TA difference between the two carriers is not used to compensate for the switching of the two carriers. The length of time the carrier is interrupted, but the terminal equipment configures the first handover interval as the first value, that is, it is configured as a common value, which can reduce the processing complexity of the terminal equipment and can be used when the terminal equipment does not support the completion of switching of a radio frequency link. When communicating through a radio frequency link other than the one radio frequency link, data is transmitted through the third carrier in advance to improve data transmission efficiency and resource utilization.

As an example, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and indicates that the first switching interval is configured on the carrier before the carrier switching. superior. In this case, the terminal device switches from the first carrier to the third carrier according to the first message. The first switching interval is configured on the first carrier. For example, the first switching interval may be located on a corresponding carrier of the first carrier. The end of the time slot (can be recorded as time slot 1). Optionally, the terminal device may determine that the first switching interval is the first value, as shown in Figure 6; or, the terminal device may determine that the first switching interval is the sum of the first value and the second value, as shown in Figure 7 Show.

In the above example, if information 1 indicates that the terminal device supports communication through a radio frequency link other than one radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit data through the second carrier at time T1, and /Or transmit data through the third carrier at the beginning of time slot 2. Alternatively, if the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit through the second carrier at the beginning of time slot 2 data, and/or transmit data via the third carrier at the beginning of time slot 2. In mode 1_2, time T1 is a time between the starting time when the terminal equipment adjusts the first radio frequency link and the end time of time slot 1, as shown in Figures 6 and 7 .

In the example shown in Figure 6, the first TA is smaller than the second TA, and the communication distance between the terminal device and the network device 2 is farther than the communication distance between the terminal device and the network device 1, which means that the terminal device needs to advance more time to transmit data on the second carrier. For example, the terminal device starts transmitting data on the second carrier at time T1 and starts transmitting data on the third carrier at the starting time of time slot 2. This time T1 is the same as the time of time slot 2. The difference in starting time is equal to the difference between the second TA and the first TA, as shown in Figure 6. In this case, the terminal equipment switches between two carriers with the same TA and configures the first switching interval as the first value, which can reduce the processing complexity of the terminal equipment. Furthermore, the terminal equipment configures the first switching interval on the carrier before carrier switching and is located at the end of time slot 1, which can avoid affecting the transmission of control information through the first carrier in time slot 1 and avoid affecting the transmission of the terminal equipment through the third carrier. The transmission of control information of the second carrier and the third carrier enables the network device to timely schedule the data transmission of the terminal device on the second carrier and the third carrier.

In the example shown in Figure 7, the terminal device switches between two carriers with the same TA, and the first switching interval is configured as the sum of the first value and the second value, which can reserve enough time for the terminal device. Adjust the RF link.

As another example, the first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and indicates that the first switching interval is configured in the second carrier set. on the carrier corresponding to the minimum TA. In this case, the terminal device switches from the first carrier to the second carrier according to the first message, and the first switching interval is configured on the second carrier. Optionally, the terminal device may determine the first switching interval as the difference between the first value and the second value, as shown in FIG. 8 .

In the above example, if information 1 indicates that the terminal device supports communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device can communicate through the third radio frequency link at the beginning of time slot 2. The carrier transmits data, and/or the second carrier transmits data at time T3. Alternatively, if the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device may transmit data through the third carrier at time T3, and/or At time T3, data is transmitted via the second carrier. In mode 1_3, time T3 is the completion time of the terminal equipment switching from the first carrier to the second carrier, which is located after the starting time of time slot 2, as shown in Figure 8 .

In the example shown in Figure 8, the first TA is larger than the second TA, and the terminal device can switch from the first carrier corresponding to the larger TA to the second carrier corresponding to the smaller TA, so that the TA between the two carriers can be utilized. The difference is used to compensate for the length of time that the carrier is interrupted when the two carriers are switched. The length of time that originally needs to be interrupted is shortened from the length of time that needs to be interrupted to the length of time that is the difference between the first value and the second value. This can reduce the interruption of data transmission by terminal equipment on the carrier. time, which can improve resource utilization.

As another example, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and indicates that the first switching interval is configured in the second carrier set. on the carrier corresponding to the minimum TA. In this case, the terminal device switches from the first carrier to the third carrier according to the first message, and the first switching interval is configured on the third carrier. Optionally, the terminal device may determine the first switching interval to be the first value, as shown in Figure 9.

In the above example, if information 1 indicates that the terminal device supports communication through a radio frequency link other than one radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit data through the second carrier at time T1, and /or pass the third at time T4 Carrier waves transmit data. Alternatively, if the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device may transmit data through the second carrier at time T4, and/or Data is transmitted through the third carrier at time T4. In mode 1_4, time T4 is the completion time of the terminal equipment switching from the first carrier to the third carrier, which is located after the starting time of time slot 2, as shown in Figure 9 .

In the above example shown in Figure 9, the first TA is smaller than the second TA, the terminal device switches between two carriers with the same TA, and configures the first switching interval as the first value, which can reduce the complexity of the terminal device processing. Spend.

As yet another example, the first TA is smaller than the second TA, the first message indicates that the terminal device switches from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and indicates that the first part of the first switching interval is configured in On the carrier before carrier switching, the remainder of the first switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. In this case, the terminal device switches from the first carrier to the second carrier according to the first message, the first part of the first switching interval is configured on the first carrier, and the first part of the first switching interval is The remaining part is configured on the second carrier. Optionally, the terminal device may determine that the first part is the second value and the remaining part is the first value, as shown in Figure 10; or, the terminal device may determine that the first part is the first value and the remaining part is the second value. value, as shown in Figure 11.

In the above example, if the information 1 indicates that the terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit data through the second carrier at time T3, and /Or transmit data through the third carrier at the beginning of time slot 2. Alternatively, if the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device may transmit data through the second carrier at time T3, and/or Data is transmitted through the third carrier at time T3. In mode 1_5, time T3 may be located after the starting time of time slot 2, as shown in Figure 10; or it may be the starting time of time slot 2, as shown in Figure 11.

In the examples shown in Figures 10 and 11, the first TA is smaller than the second TA, the terminal device switches from the carrier corresponding to the larger TA to the carrier corresponding to the smaller TA, and configures a part of the first switching interval in the first On the carrier, the remaining part is configured on the second carrier, so that the TA difference between the first carrier and the second carrier can be used to transmit data in parallel through the second carrier and the third carrier as soon as possible, improving data transmission efficiency.

In another possible implementation, the first message includes the first identifier. For example, the first identifier is the identifier of the first TA, and the terminal device can switch from the first carrier to the third carrier according to the first identifier. For another example, the first identifier is the identifier of the second TA, and the terminal device can switch from the first carrier to the second carrier according to the first identifier. In this example, the carrier to which the first switching interval is configured and the size of the first switching interval can be determined with reference to the relevant descriptions in FIGS. 4 to 11 , which will not be described again here.

It should be noted that when the terminal equipment switches from the first carrier to the second carrier, the terminal equipment can simultaneously switch the frequency corresponding to the first radio frequency link applied by the terminal equipment to the first carrier to the frequency of the second carrier and switch the terminal The frequency corresponding to the second radio frequency link of the device is switched to the frequency of the third carrier; or the frequency corresponding to the first radio frequency link can be switched to the frequency of the second carrier first, and then the frequency corresponding to the second radio frequency link is switched. to the frequency of the third carrier; or you can also switch the frequency corresponding to the second radio frequency link to the frequency of the third carrier first, and then switch the frequency corresponding to the first radio frequency link to the frequency of the second carrier; or you can also switch the frequency corresponding to the second radio frequency link to the frequency of the third carrier. The frequency corresponding to the first radio frequency link is first switched to the frequency of the second carrier, and during the switching process, the frequency corresponding to the second radio frequency link is switched to the frequency of the third carrier. This is not limited by the embodiment of the present application.

Similarly, when the terminal equipment switches from the first carrier to the third carrier, the terminal equipment can simultaneously switch the frequency corresponding to the first radio frequency link of the terminal equipment applied to the first carrier to the frequency of the third carrier and change the third frequency of the terminal equipment. The frequency corresponding to the second radio frequency link is switched to the frequency of the second carrier; or the frequency corresponding to the first radio frequency link can be switched to the frequency of the third carrier first, and then the frequency corresponding to the second radio frequency link is switched to the frequency of the second carrier. The frequency of the carrier; or you can also first switch the frequency corresponding to the second radio frequency link to the frequency of the second carrier, and then switch the frequency corresponding to the first radio frequency link to the frequency of the third carrier; or you can also first switch the frequency corresponding to the third carrier. The frequency corresponding to one radio frequency link is switched to the frequency of the third carrier, and during the switching process, the frequency corresponding to the second radio frequency link is switched to the frequency of the second carrier. This is not limited by the embodiments of the present application.

For method two: the first carrier set includes the second carrier and the third carrier, and the second carrier set includes the first carrier. The first message may instruct the terminal device to switch from the carrier corresponding to the smallest TA or the largest TA in the first carrier set to the third carrier. a carrier, and/or includes (or indicates) a second identifier. In this case, the terminal device switches from the second carrier or the third carrier to the first carrier according to the first message. In the second method, the carrier to which the first switching interval is configured during the carrier switching process may be indicated by the network device or may be determined by the terminal device, which is not limited in this embodiment of the present application. For convenience of description, this embodiment of the present application takes the carrier for which the network device indicates that the first switching interval is configured as an example.

In a possible implementation, the first message may instruct the terminal device to select the carrier corresponding to the minimum TA or the maximum TA from the first carrier set. The first carrier is switched to the first carrier, and the terminal device switches from the second carrier or the third carrier to the first carrier according to the first message.

It should be noted that the terminal device may switch the frequency corresponding to the third radio frequency link applied to the second carrier by the terminal device to the frequency of the first carrier within the first value, and close the fourth radio frequency chain applied to the third carrier. The duration of the road may be the first value, or may be another value, which is not limited in the embodiment of the present application. Similarly, the terminal device can switch the frequency corresponding to the fourth radio frequency link to the frequency of the first carrier within the first value, and the time period for closing the third radio frequency link can be the first value, or it can be other values. value, which is not limited in the embodiments of this application. For the description of the first value, please refer to the terminology explanation section and will not be repeated here.

As an example, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and indicates that the first switching interval is configured in the first carrier set. On the carrier corresponding to the minimum TA. In this case, the terminal device switches from the third carrier to the first carrier according to the first message, and the first switching interval is configured on the third carrier. Optionally, the terminal device may determine the first switching interval to be the first value, as shown in Figure 12.

In the example shown in Figure 12, the first TA is smaller than the second TA, the terminal device switches between two carriers with the same TA, and configures the first switching interval as the first value, which can reduce the processing complexity of the terminal device. . Moreover, the terminal device configures the first switching interval on the carrier before carrier switching, which can avoid affecting the transmission of control information of the terminal device through the first carrier, so that the network device can timely schedule the data transmission of the terminal device on the first carrier.

As an example, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and indicates that the first switching interval is configured after the carrier switching. on the carrier. In this case, the terminal device switches from the third carrier to the first carrier according to the first message, and the first switching interval is configured on the first carrier. Optionally, the terminal device may determine that the first switching interval is the first value, as shown in Figure 13.

In the example shown in Figure 13, the first TA is smaller than the second TA, the terminal device switches between two carriers with the same TA, and configures the first switching interval as the first value, which can reduce the processing complexity of the terminal device. .

As another example, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and indicates that the first switching interval is configured in the first carrier set. on the carrier corresponding to the maximum TA. In this case, the terminal device switches from the second carrier to the first carrier according to the first message, and the first switching interval is configured on the second carrier. Optionally, the terminal device may determine the first switching interval as the difference between the first value and the second value, as shown in Figure 14.

In the example shown in Figure 14, the first TA is smaller than the second TA, and the terminal device can switch from the second carrier corresponding to the larger TA to the first carrier corresponding to the smaller TA, so that the TA between the two carriers can be utilized. The difference is used to compensate for the length of time that the carrier is interrupted when the two carriers are switched. The length of time that originally needs to be interrupted is shortened from the length of time that needs to be interrupted to the length of time that is the difference between the first value and the second value. This can reduce the interruption of data transmission by terminal equipment on the carrier. time, which can improve resource utilization.

As another example, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and indicates that the first switching interval is configured after the carrier switching. on the carrier. In this case, the terminal device switches from the second carrier to the first carrier according to the first message, and the first switching interval is configured on the first carrier. Optionally, the terminal device may determine the first switching interval as the difference between the first value and the second value, as shown in FIG. 15 .

In the example shown in Figure 15, the first TA is smaller than the second TA, and the terminal device can switch from the second carrier corresponding to the larger TA to the first carrier corresponding to the smaller TA, so that the TA between the two carriers can be utilized. The difference is used to compensate for the length of time that the carrier is interrupted when the two carriers are switched. The length of time that originally needs to be interrupted is shortened from the length of time that needs to be interrupted to the length of time that is the difference between the first value and the second value. This can reduce the interruption of data transmission by terminal equipment on the carrier. time, which can improve resource utilization.

As another example, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and indicates that the first part of the first switching interval is configured in On the carrier corresponding to the smallest TA in the first carrier set, the remaining part of the first switching interval except the first part is configured on the carrier corresponding to the largest TA in the first carrier set. In this case, the terminal device switches from the third carrier to the first carrier according to the first message, the first part of the first switching interval is configured on the third carrier, and the first part of the first switching interval is The remaining part is configured on the second carrier. Optionally, the terminal device may determine that the first part is the first value and the remaining part is the difference between the first value and the second value, as shown in FIG. 16 .

As yet another example, the first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and indicates that the first part of the first switching interval is configured in On the carrier corresponding to the smallest TA in the first carrier set, the remaining part of the first switching interval except the first part is configured on the carrier corresponding to the largest TA in the first carrier set. In this case, the terminal device switches from the third carrier to the second carrier according to the first message, the first part of the first switching interval is configured on the third carrier, and the first part of the first switching interval is The remaining part is configured on the second carrier. Optionally, the terminal device may determine that the first part is the first value and the remaining part is the difference between the first value and the second value, as shown in FIG. 17 .

As yet another example, the first TA is larger than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and indicates that the first part of the first switching interval is configured in On the carrier corresponding to the smallest TA in the first carrier set, the remainder of the first switching interval except the first part is configured on the carrier after carrier switching. In this case, the terminal device switches from the second carrier to the first carrier according to the first message, the first part of the first switching interval is configured on the second carrier, and the first part of the first switching interval is The remaining part is configured on the first carrier. Optionally, the terminal device may determine that the first part is the second value and the remaining part is the first value, as shown in Figure 18; or, the terminal device may determine that the first part is the first value and the remaining part is the second value. value, as shown in Figure 19.

In yet another possible implementation, the first message includes the second identification. For example, the second identifier is the identifier of the first TA, and the terminal device can switch from the third carrier to the first carrier according to the second identifier. For another example, the second identifier is the identifier of the second TA, and the terminal device can switch from the second carrier to the first carrier according to the second identifier. In this example, the carrier to which the first switching interval is configured and the size of the first switching interval can be determined with reference to the relevant descriptions in FIGS. 12 to 19 , which will not be described again here.

It should be noted that when the terminal equipment switches from the second carrier to the first carrier, the terminal equipment can simultaneously switch the frequency corresponding to the third radio frequency link applied by the terminal equipment to the second carrier to the frequency of the first carrier and turn off the terminal. The device is applied to the fourth radio frequency link of the third carrier; or you can first switch the frequency corresponding to the third radio frequency link to the frequency of the first carrier, and then turn off the fourth radio frequency link; or you can also turn off the fourth radio frequency first. link, and then switch the frequency corresponding to the third radio frequency link to the frequency of the first carrier; or you can also switch the frequency corresponding to the third radio frequency link to the frequency of the first carrier first, and then turn it off during the switching process. The fourth radio frequency link is not limited in the embodiment of this application.

Similarly, when the terminal device switches from the third carrier to the first carrier, the terminal device can simultaneously switch the frequency corresponding to the fourth radio frequency link applied by the terminal device to the third carrier to the frequency of the first carrier and close the terminal device application. The third radio frequency link of the second carrier; or you can first switch the frequency corresponding to the fourth radio frequency link to the frequency of the first carrier, and then close the third radio frequency link; or you can also close the third radio frequency link first , and then switch the frequency corresponding to the fourth radio frequency link to the frequency of the first carrier; or you can also switch the frequency corresponding to the fourth radio frequency link to the frequency of the first carrier first, and then turn off the third radio frequency link during the switching process. The radio frequency link is not limited in the embodiments of this application.

For method three: the first carrier set includes the first carrier and the fourth carrier, and the second carrier set includes the second carrier and the third carrier. The first message may instruct the terminal device to select the minimum TA or the maximum TA from the first carrier set. The carrier is switched to a carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or includes (or indicates) the third identifier and the fourth identifier. In this case, the terminal device switches from the first carrier to the second carrier, and from the fourth carrier to the third carrier according to the first message; or, switches from the first carrier to the third carrier, and from the fourth carrier Switch to the second carrier. In the third method, the carrier for which the second switching interval is configured may be indicated by the network device, or may be determined by the terminal device, which is not limited in this embodiment of the present application. The carrier configured for the third switching interval may be indicated by the network device, or may be determined by the terminal device, which is not limited in the embodiment of the present application. For convenience of description, this embodiment of the present application takes the network device as an example to indicate the carrier in which the second switching interval is configured and the carrier in which the third switching interval is configured.

In a possible implementation, the first message instructs the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and the terminal device switches according to the first The message is switched from the first carrier to the second carrier, and from the fourth carrier to the third carrier; or, from the first carrier to the third carrier, and from the fourth carrier to the second carrier.

As an example, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/or instructs the terminal device to switch from The carrier corresponding to the largest TA in the first carrier set is switched to the carrier corresponding to the largest TA in the second carrier set, and the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured On the carrier corresponding to the smallest TA in the first carrier set. In this case, the terminal device switches from the first carrier to the third carrier, and from the fourth carrier to the second carrier according to the first message. The second switching interval is configured on the first carrier, and the third switching interval is configured on the fourth carrier. Optionally, the terminal device may determine that the second switching interval is the first value and the third switching interval is the first value, as shown in Figure 20; or, the terminal device may determine that the second switching interval is the first value and the third switching interval is the first value. The third switching interval is the sum of the first value and the second value, as shown in Figure 21.

In the above example, if the information 1 indicates that the terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit data through the second carrier at time T5, and /Or transmit data through the third carrier at the beginning of time slot 2. Alternatively, if the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device may transmit data through the second carrier at time T5, and/or Data is transmitted through the third carrier at time T5. In mode 3_1, time T5 is the completion time of the terminal equipment switching from the fourth carrier to the second carrier, as shown in Figures 20 and 21.

In the example shown in Figure 20, the first TA is greater than the second TA, the terminal equipment switches between two carriers with the same TA, and both the second switching interval and the third switching interval are configured as the first value, so that Reduce terminal device processing complexity. In the example shown in Figure 21, the terminal device configures the third switching interval as the sum of the first value and the second value, which can reserve more time for the terminal device to adjust the radio frequency link. Moreover, the terminal equipment configures the second switching interval and the third switching interval on the carrier before carrier switching, which can avoid affecting the transmission of control information of the terminal equipment through the second carrier and the third carrier, so that the network equipment can schedule the terminal equipment in a timely manner Data transmission on the second and third carriers.

As an example, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/or instructs the terminal device to switch from The carrier corresponding to the largest TA in the first carrier set is switched to the carrier corresponding to the largest TA in the second carrier set, and the second switching interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured On the carrier corresponding to the smallest TA in the second carrier set. In this case, the terminal device switches from the first carrier to the third carrier and from the fourth carrier to the second carrier according to the first message. The second switching interval is configured on the third carrier. The third switching interval configured on the second carrier. Optionally, the terminal device may determine that the second switching interval is the first value and the third switching interval is the first value, as shown in Figure 22; or, the terminal device may determine that the second switching interval is the first value and the first value. The sum of the second value and the third switching interval is the first value, as shown in FIG. 23 .

In the above example, if the information 1 indicates that the terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit data through the second carrier at time T5, and /Or transmit data through the third carrier at time T5. Alternatively, if the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device may transmit data through the second carrier at time T5, and/or Data is transmitted through the third carrier at time T5. In mode 3_2, time T4 may be before time T5, as shown in Figure 22; or time T4 may also be time T5, as shown in Figure 23.

In the example shown in Figure 22, the first TA is greater than the second TA, the terminal device switches between two carriers with the same TA, and both the second switching interval and the third switching interval are configured as the first value, so that Reduce terminal device processing complexity. In the example shown in Figure 23, the terminal device configures the second switching interval on the third carrier, and the third switching interval is the sum of the first value and the second value. In this way, the first TA and the second value can be used. The TA difference between TAs compensates for the transmission delay on the second carrier and the third carrier, and regardless of whether the terminal device supports communication through a radio frequency link other than the radio frequency link before the handover of one radio frequency link is completed, All terminal devices can transmit data in parallel on the second carrier and the third carrier at the same time, which can improve data transmission efficiency.

As another example, the first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instructs the terminal device Switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and indicate that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is Configured on the carrier corresponding to the smallest TA in the first carrier set. In this case, the terminal device switches from the first carrier to the second carrier, and from the fourth carrier to the third carrier according to the first message, the second switching interval is configured on the first carrier, and the third switching The interval is configured on the fourth carrier. Optionally, the terminal device may determine that the second switching interval is the sum of the first value and the second value and the third switching interval is the difference between the first value and the second value, as shown in FIG. 24 .

In the above example, regardless of whether the terminal device supports communication through a radio frequency link other than one radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit data through the second carrier at time T3, and/ Or transmit data through the third carrier at time T3.

In the example shown in Figure 24, the first TA is larger than the second TA, the terminal device performs carrier switching between two carriers corresponding to different TAs, and configures the second switching interval as the difference between the first value and the second value, so that The TA difference between the first carrier and the second carrier is used to compensate for the length of time the carrier is interrupted during the switching of the first carrier to the second carrier, reducing the original time required to interrupt the first value to the time required to interrupt the first value and the second The length of time the terminal device interrupts data transmission on the carrier can be reduced and resource utilization can be improved. The terminal equipment configures the third switching interval as the sum of the first value and the second value, can reserve more time to adjust the radio frequency link, and uses the TA difference between the fourth carrier and the third carrier to compensate for the second carrier and the second carrier. The transmission delay between the third carriers, that is, the completion time of the terminal equipment switching from the first carrier to the second carrier and the completion time of the fourth carrier switching to the third carrier can be equal, so that the terminal equipment can pass the second carrier and the third carrier at the same time. The third carrier performs parallel transmission to improve data transmission efficiency.

As another example, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instructs the terminal device to switch from The carrier corresponding to the largest TA in the first carrier set is switched to the carrier corresponding to the smallest TA in the second carrier set, and the second switching interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured On the carrier corresponding to the smallest TA in the second carrier set. In this case, the terminal According to the first message, the device switches from the first carrier to the second carrier, and from the fourth carrier to the third carrier. The second switching interval is configured on the second carrier, and the third switching interval is configured on the third carrier. on the carrier. Optionally, the terminal device may determine that the second switching interval is the sum of the first value and the second value and the third switching interval is the difference between the first value and the second value, as shown in Figure 25; or, the terminal device It can be determined that the second switching interval is the sum of the first value and the second value and the third switching interval is the first value, as shown in FIG. 26 .

In the above example, if the information 1 indicates that the terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit data through the second carrier at time T3, and /Or transmit data through the third carrier at time T6. Alternatively, if the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device may transmit data through the second carrier at time T3, and/or Data is transmitted through the third carrier at time T3. In mode 3_2, time T6 may be the completion time of the terminal device switching from the fourth carrier to the third carrier. The time T6 may be before the time T3, as shown in FIG. 25; or the time T6 may also be the time T3, as shown in FIG. 26.

In the example shown in Figure 25, the first TA is smaller than the second TA, the terminal device performs carrier switching between two carriers corresponding to different TAs, and configures the second switching interval on the second carrier. The second switching interval is The sum of the first value and the second value can reserve more time to adjust the radio frequency link. The terminal equipment configures the third switching interval on the third carrier, and the third switching interval is the difference between the first value and the second value, and can use the TA difference between the fourth carrier and the third carrier to compensate for the fourth carrier switching. The length of time the carrier is interrupted during the process of reaching the third carrier is reduced from the length of time that originally needs to interrupt the first value to the length of time that the difference between the first value and the second value needs to be interrupted, thereby reducing the risk of terminal equipment interrupting data transmission on the carrier. time, which can improve resource utilization.

In the example shown in Figure 26, the first TA is smaller than the second TA, the terminal device performs carrier switching between two carriers corresponding to different TAs, and configures the second switching interval on the second carrier. The second switching interval is The sum of the first value and the second value can reserve more time to adjust the radio frequency link. The terminal equipment configures the third switching interval on the third carrier, and the third switching interval is the first value, which can reduce the processing complexity of the terminal equipment and use the TA difference between the fourth carrier and the third carrier to compensate for the third switching interval. The transmission delay between the second carrier and the third carrier, that is, the completion time of the terminal equipment switching from the first carrier to the second carrier and the completion time of the fourth carrier switching to the third carrier, can be equal, so that the terminal equipment can pass the third carrier at the same time. The second carrier and the third carrier are transmitted in parallel to improve data transmission efficiency.

As yet another example, the first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instructs the terminal device Switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and indicate that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, in the third switching interval The first part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the third switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. In this case, the terminal device switches from the first carrier to the second carrier, and from the fourth carrier to the third carrier according to the first message, the second switching interval is configured on the first carrier, and the third switching The first part of the interval is configured on the fourth carrier, and the remaining part of the third switching interval except the first part is configured on the third carrier. Optionally, the terminal device may determine that the second switching interval is the difference between the first value and the second value, the first part is the second value and the remaining part is the first value, as shown in FIG. 27 .

In the above example, if the information 1 indicates that the terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit data through the second carrier at time T3, and /Or transmit data through the third carrier at time T6. Alternatively, if the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device may transmit data through the second carrier at time T6, and/or At time T6, data is transmitted via the third carrier. In mode 3_5, time T6 is located after time T3, as shown in Figure 27.

In the example shown in Figure 27, the first TA is larger than the second TA, the terminal device performs carrier switching between two carriers corresponding to different TAs, and configures the second switching interval on the first carrier. The second switching interval is The difference between the first value and the second value can use the TA difference between the first carrier and the second carrier to compensate for the length of time the carrier is interrupted during the switching of the first carrier to the second carrier, reducing the need to interrupt the first value The duration is shortened to the duration of the difference between the first interrupt value and the second value, thereby reducing the duration for the terminal device to interrupt data transmission on the carrier, and improving resource utilization.

As yet another example, the first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instructs the terminal device Switching from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and indicating that the first part of the second switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, the The remainder of the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set. In this case, the terminal device switches from the first carrier to the second carrier and from the fourth carrier to the third carrier according to the first message, and the first part of the second switching interval is configured on the first carrier, The remainder of the second switching interval except the first part is configured in the On the second carrier, the third switching interval is configured on the fourth carrier. Optionally, the terminal device may determine that the first part is the second value, the remaining part is the first value, and the third switching interval is the difference between the first value and the second value, as shown in FIG. 28 .

In the above example, if the information 1 indicates that the terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed, the terminal device can transmit data through the second carrier at time T3, and /Or transmit data through the third carrier at the beginning of time slot 2. Alternatively, if the information 1 indicates that the terminal device does not support communication through a radio frequency link other than the radio frequency link before the switching of one radio frequency link is completed, the terminal device may transmit data through the second carrier at time T3, and/or Data is transmitted through the third carrier at time T3. In mode 3_6, the starting time of time slot 2 is time T6, and time T3 is located after time T6, as shown in Figure 28.

In the example shown in Figure 28, the first TA is smaller than the second TA, the terminal device performs carrier switching between two carriers corresponding to different TAs, and configures the third switching interval on the fourth carrier. The third switching interval is The difference between the first value and the second value can use the TA difference between the fourth carrier and the third carrier to compensate for the length of time the carrier is interrupted during the switching of the fourth carrier to the third carrier, reducing the need to interrupt the first value The duration is shortened to the duration of the difference between the first interrupt value and the second value, thereby reducing the duration for the terminal device to interrupt data transmission on the carrier, and improving resource utilization.

In yet another possible implementation, the first message includes a third identifier and a fourth identifier. For example, the third identifier is the identifier of the first TA, and the fourth identifier is the identifier of the first TA. According to the third identifier and the fourth identifier, the terminal device can switch from the first carrier to the third carrier, and from the fourth carrier to the third carrier. Switch to the second carrier. For example, the third identifier is the identifier of the first TA, and the fourth identifier is the identifier of the second TA. According to the third identifier and the fourth identifier, the terminal device can switch from the first carrier to the second carrier, and from the fourth carrier to the second carrier. Switch to third carrier. For another example, the third identifier is the identifier of the second TA, and the fourth identifier is the identifier of the first TA. According to the third identifier and the fourth identifier, the terminal device can switch from the fourth carrier to the third carrier, and from the first carrier to the third carrier. The carrier is switched to the second carrier. For another example, the third identifier is the identifier of the second TA, and the fourth identifier is the identifier of the second TA. According to the third identifier and the fourth identifier, the terminal device can switch from the fourth carrier to the second carrier, and from the first carrier to the second carrier. The carrier is switched to the third carrier.

It should be noted that the starting time of the second switching interval and the starting time of the third switching interval may be the same or different. In addition, the starting time for the terminal equipment to switch between the two pairs of carriers may be the same or different. For example, the terminal device can switch from the first carrier to the third carrier and from the fourth carrier to the second carrier at the same time; or, it can also switch from the first carrier to the third carrier first, and then from the fourth carrier to the second carrier. carrier; or, you can also switch from the fourth carrier to the second carrier first, and then switch from the first carrier to the third carrier; or, you can also switch from the fourth carrier during the process of switching from the first carrier to the third carrier. to the second carrier and so on. Similarly, the terminal equipment can switch from the first carrier to the second carrier and from the fourth carrier to the third carrier at the same time; or, it can also switch from the first carrier to the second carrier first, and then switch from the fourth carrier to the third carrier. three carriers; or, you can also switch from the fourth carrier to the third carrier first, and then switch from the first carrier to the second carrier; or, you can also switch from the fourth carrier to the second carrier during the process of switching from the first carrier to the second carrier. Switch to third carrier, etc.

In a possible implementation, the terminal device periodically sends the second value to the network device. The second value, which may also be called the TA difference, is the difference between the first TA and the second TA. For example, the second value may be the absolute value of the difference between the first TA and the second TA. For example, the terminal device may periodically send the second value as capability information to the network device. Wherein, the period value at which the terminal device sends the second value is less than or equal to the first threshold. The first threshold is a small value, which may be predefined, or may be pre-negotiated between the terminal device and the network device, or may be configured by the network device for the terminal device, which is not limited in the embodiments of this application. In this implementation, the terminal device reports the second value to the network device in a smaller period, which can increase the frequency of the terminal device reporting the second value to the network device and reduce the delay in updating the second value in time due to the movement of the terminal device. The second value sent to the network device causes the second value on the network device side to be different from the second value on the terminal device side, so that the network device can obtain the updated second value of the terminal device in a timely manner.

In another possible implementation, the terminal device can periodically or aperiodically send the second value to the network device, and use the second value after the sending is completed, such as determining the first switching based on the second value. interval, the second switching interval or the third switching interval, etc. In this implementation, the terminal device uses the second value after sending the second value to the network device. This can prevent the terminal device from not sending the updated second value to the network device in time after updating the second value, causing network problems. The second value on the device side is inconsistent with the second value on the terminal device side.

In yet another possible implementation, the terminal device may send the first indication information to the network device periodically or aperiodically. The first indication information may indicate a range of TA difference values to which the second value belongs. The first indication information can be understood as a TA difference level (level), or as an index of a TA difference level, or the like. In this implementation, the terminal device sends the TA difference range to which the second value belongs to the network device. The terminal device does not send the updated second value to the network device in time. The updated second value may belong to the TA difference range. , this can reduce the difference between the second value on the network device side and the updated second value on the terminal device side, reduce the frequency of the terminal device reporting the second value to the network device, and save network resources.

In the above-mentioned embodiments provided by the present application, the methods provided by the embodiments of the present application are introduced from the perspective of interaction between network devices and terminal devices. In order to implement each function in the method provided by the above embodiments of the present application, the terminal device or network device may include a hardware structure and/or a software module to implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. .

Figures 29 and 30 are schematic structural diagrams of possible communication devices provided by embodiments of the present application. The communication device can be used to implement the functions of the terminal equipment or network equipment in the above method embodiments, and therefore can also achieve the beneficial effects of the above method embodiments. In the embodiment of the present application, the communication device may be one of the terminal devices 120a-120j as shown in Figure 1, or may be the network device 110a or 110b as shown in Figure 1, or may be applied to the terminal device. Or modules of network equipment (such as chips).

As shown in Figure 29, the communication device 2900 includes a processing module 2901 and a transceiver module 2902. The communication device 2900 is used to implement the functions of the terminal device or network device in the method embodiment shown in any one of the above-mentioned Figures 3 to 28.

If the communication device 2900 is used to implement the functions of the terminal device in the method embodiment shown in any one of Figure 3 to Figure 28, as an example, the transceiver module 2902 is used to receive the first message from the network device, and the processing module 2901, used to switch from the first carrier set to the second carrier set according to the first message; wherein the first carrier set includes a first carrier, and the second carrier set includes a second carrier and a third carrier , the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the minimum time advance TA or the maximum TA in the second carrier set, and/or includes a first identifier, the first The identifier is the identifier of a TA corresponding to a carrier in the second carrier set; or, the first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message Instruct the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier, and/or include a second identifier, where the second identifier is in the first carrier set The identification of a TA corresponding to one carrier; or, the first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device Switching from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or including a third identifier and a fourth identifier, the third The identifier is an identifier of a TA corresponding to a carrier in the first carrier set, and the fourth identifier is an identifier of a TA corresponding to a carrier in the second carrier set; wherein the first carrier corresponds to the first TA , the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the second TA.

As another example, the transceiver module 2902 may be used to send a second message to the network device, where the second message includes one or more of the following information:

Or, whether the terminal device supports a configured fallback frequency band;

If the communication device 2900 is used to implement the functions of the terminal device in the method embodiment shown in any one of Figure 3 to Figure 28, as an example, the processing module 2901 is used to configure the first TA and the second TA for the terminal device, and a transceiver module 2902, configured to send a first message to the terminal device; wherein the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message Instruct the terminal device to switch from the first carrier to a carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or include a first identifier, and the first identifier is a carrier in the second carrier set. The identification of the TA corresponding to one carrier; or, the first carrier set includes a second carrier and a third carrier, the second carrier set includes the first carrier, and the first message instructs the terminal device to obtain the first carrier from the third carrier. The carrier corresponding to the minimum TA or the maximum TA in a carrier set is switched to the first carrier, and/or includes a second identifier, and the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or , the first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device selects the smallest carrier from the first carrier set. The carrier corresponding to the TA or the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or includes a third identifier and a fourth identifier, and the third identifier is in the first carrier set. The identification of the TA corresponding to a carrier, the first The fourth identifier is the identifier of the TA corresponding to one carrier in the second carrier set; wherein the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, and the third carrier corresponds to the third A TA, the fourth carrier corresponds to the second TA.

As another example, the transceiving module 2902 may be configured to receive a second message from the terminal device, where the second message includes one or more of the following information:

Or, whether the terminal device supports a configured fallback frequency band;

More detailed descriptions about the above-mentioned processing module 2901 and transceiver module 2902 can be directly obtained by referring to the relevant descriptions in the method embodiments shown in any one of Figures 3 to 28, and will not be described again here.

As shown in FIG. 30 , communication device 3000 includes processor 3010 . Optionally, the communication device 3000 may also include a communication interface 3020 (indicated by a dotted line in Figure 30). The processor 3010 and the communication interface 3020 are coupled to each other. It can be understood that the communication interface 3020 may be a transceiver or an input-output interface. Optionally, the communication device 3000 may also include a memory 3030 (indicated by a dotted line in Figure 30) for storing instructions executed by the processor 3010 or input data required for the processor 3010 to run the instructions or storage after the processor 3010 executes the instructions. generated data. Optionally, the memory 3030, the processor 3010 and the communication interface 3020 are connected through a bus 3040. In the embodiments of this application, instructions may also refer to computer programs, codes, program codes, programs, applications, software, or executable files.

When the communication device 3000 is used to implement the method shown in any one of Figures 3 to 28, the processor 3010 is used to implement the functions of the above-mentioned processing module 2901, and the communication interface 3020 is used to implement the functions of the above-mentioned transceiver module 2902.

When the above communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiment. The terminal equipment chip receives information from other modules (such as radio frequency modules or antennas) in the terminal equipment, and the information is sent by the network equipment to the terminal equipment; or, the terminal equipment chip sends information to other modules (such as radio frequency modules or antennas) in the terminal equipment. Antenna) sends information, which is sent by the terminal device to the network device.

When the above communication device is a module applied to a network device, the network device module implements the functions of the network device in the above method embodiment. The network device module receives information from other modules in the network device (such as a radio frequency module or antenna), which is sent by the terminal device to the network device; or, the network device module sends information to other modules in the network device (such as a radio frequency module or antenna). Antenna) sends information, which is sent by the network device to the terminal device. The network equipment module here can be the baseband chip of the network equipment, or it can be a DU or other module. The DU here can be a DU under the open radio access network (open radio access network, O-RAN) architecture.

It can be understood that the processor in the embodiment of the present application can be a central processing unit (CPU), or other general-purpose processor, digital signal processor (DSP), or application-specific integrated circuit (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. A general-purpose processor can be a microprocessor or any conventional processor.

The method steps in the embodiments of the present application can be implemented by hardware or by a processor executing software instructions. Software instructions can be composed of corresponding software modules, and the software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory In memory, register, hard disk, mobile hard disk, CD-ROM or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage media may be located in an ASIC. Additionally, the ASIC can be located in network equipment or terminal equipment. Of course, the processor and the storage medium can also exist as discrete components in network equipment or terminal equipment.

This application also provides a computer-readable storage medium that stores a computer program or instructions. When the computer program or instructions are run, the steps executed by the network device or the terminal device in the foregoing method embodiments are implemented. method. In this way, the functions described in the above embodiments can be implemented in the form of software functional units and sold or used as independent products. Based on this understanding, the technical solution of the present application essentially or contributes to the technical solution or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions. So that a computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the steps of the methods described in various embodiments of this application. Storage media include: U disk, mobile hard disk, read-only memory ROM, random access memory RAM, magnetic disk or optical disk and other media that can store program code.

This application also provides a computer program product. The computer program product includes: computer program code. When the computer program code is run on a computer, it causes the computer to execute any of the foregoing method embodiments executed by a terminal device or a network device. Methods.

This application also provides a system, which includes a terminal device and/or a network device.

Embodiments of the present application also provide a processing device, including a processor and an interface; the processor is configured to execute the method executed by the terminal device or network device involved in any of the above method embodiments.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a user equipment, or other programmable device. The computer program or instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer program or instructions may be transmitted from a website, computer, A server or data center transmits via wired or wireless means to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media, such as floppy disks, hard disks, and magnetic tapes; optical media, such as digital video optical disks; or semiconductor media, such as solid-state hard disks. The computer-readable storage medium may be volatile or nonvolatile storage media, or may include both volatile and nonvolatile types of storage media.

In the various embodiments of this application, if there are no special instructions or logical conflicts, the terms and/or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments are based on their inherent Logical relationships can be combined to form new embodiments.

In addition, in the embodiments of this application, information (information), signal (signal), message (message), and channel (channel) can sometimes be used interchangeably. It should be noted that when the difference is not emphasized, the meanings they intend to express are the same. of. "Of", "corresponding, relevant" and "corresponding" can sometimes be used interchangeably. It should be noted that when the difference is not emphasized, the meanings they convey are consistent.

It can be understood that the various numerical numbers involved in the embodiments of the present application are only for convenience of description and are not used to limit the scope of the embodiments of the present application. The size of the serial numbers of the above processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic.

Claims

A carrier switching method, characterized in that it is applied to terminal equipment, and the method includes:

receiving the first message from the network device;

According to the first message, switch from the first carrier set to the second carrier set;

Wherein, the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message instructs the terminal device to switch from the first carrier to the second carrier. The carrier corresponding to the minimum timing advance TA or the maximum TA in the carrier set, and/or the first message indicates a first identifier, and the first identifier is the identifier of the TA corresponding to a carrier in the second carrier set; or ,

The first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message indicates that the terminal device corresponds to the minimum TA or the maximum TA in the first carrier set. The carrier is switched to the first carrier, and/or the first message indicates a second identifier, and the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or,

The first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device selects a minimum TA from the first carrier set. Or the carrier corresponding to the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or the first message indicates a third identifier and a fourth identifier, and the third identifier is the third identifier. An identifier of a TA corresponding to a carrier in a carrier set, where the fourth identifier is an identifier of a TA corresponding to a carrier in the second carrier set;

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the second TA.
The method according to claim 1, characterized in that the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set;

The switching from the first carrier set to the second carrier set according to the first message includes:

Switching from the first carrier to the second carrier or to the third carrier.
The method according to claim 2, characterized in that:

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier before carrier switching, and the method further includes: determining that the first switching interval is the difference between the first value and the second value, or is the first value; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first The switching interval is configured on the carrier before carrier switching, and the method further includes: determining that the first switching interval is a first value, or the sum of the first value and the second value; or,

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the method further includes: determining the first switching interval as the difference between the first value and the second value; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the method further includes: determining that the first switching interval is a first value; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates The first part of the first switching interval is configured on the carrier before carrier switching, and the remaining part of the first switching interval except the first part is configured on the largest TA corresponding to the second carrier set. On the carrier, the method further includes: determining the first part to be a second value and the remaining part to be a first value, or determining the first part to be a first value and the remaining part to be a second value;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process of the two carriers, the first value is the length of time the terminal equipment adjusts the radio frequency link between the two carriers, and the second value is the The difference between the first TA and the second TA.
The method according to any one of claims 1 to 3, characterized in that, switching from the first carrier set to the second carrier set according to the first message includes:

The first identifier is the identifier of the first TA, switching from the first carrier to the third carrier; or,

The first identifier is the identifier of the second TA, and the first carrier is switched to the second carrier.
The method according to claim 1, characterized in that the first message instructs the terminal device to collect data from the first carrier. The carrier corresponding to the minimum TA or maximum TA is switched to the first carrier;

The switching from the first carrier set to the second carrier set according to the first message includes:

Switching from the second carrier or the third carrier to the first carrier.
The method according to claim 5, characterized in that:

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or is configured on the carrier after carrier switching, and the method further includes: determining the first switching interval to be a first value; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching. The method further includes: determining that the first switching interval is a first value and a first value. The difference between two values; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the first The message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on On the carrier corresponding to the largest TA in the first carrier set, the method further includes: determining the first part as a first value and the remaining part as the difference between the first value and the second value; or,

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier after the carrier switching. On the carrier, the method further includes: determining the first part to be a second value and the remaining part to be a first value, or determining the first part to be a first value and the remaining part to be a second value;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process of the two carriers, the first value is the length of time the terminal equipment adjusts the radio frequency link between the two carriers, and the second value is the The difference between the first TA and the second TA.
The method according to claim 1, 5 or 6, characterized in that, switching from the first carrier set to the second carrier set according to the first message includes:

The second identifier is the identifier of the first TA, switching from the third carrier to the first carrier; or,

The second identifier is the identifier of the second TA, which is switched from the second carrier to the first carrier.
The method of claim 1, wherein the first message instructs the terminal device to switch from a carrier corresponding to the smallest TA or the largest TA in the first carrier set to the smallest TA in the second carrier set. Or the carrier corresponding to the maximum TA;

The switching from the first carrier set to the second carrier set according to the first message includes:

Switch from the first carrier to the second carrier, and from the fourth carrier to the third carrier; or,

Handover from the first carrier to the third carrier, and from the fourth carrier to the second carrier.
The method according to claim 8, characterized in that:

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the The third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set. The method further includes: determining that the second switching interval is the first The value and the third switching interval are the first value, or the second switching interval is determined to be the first value and the third switching interval is the sum of the first value and the second value; or,

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the The third switching interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set. The method further includes: determining that the second switching interval is the first The value and the third switching interval are the first value, or the second switching interval is determined to be the sum of the first value and the second value and the third switching interval is the first value; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, the method further includes: determining the second switching interval to The sum of the first value and the second value and the third switching interval is the difference between the first value and the second value; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, the method further includes: determining the second switching interval to The sum of the first value and the second value and the third switching interval are the difference between the first value and the second value, or the second switching interval is determined to be the sum of the first value and the second value and The third switching interval is the first value; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and in the third switching interval except the The remaining part except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. The method further includes: determining the second switching interval as the difference between the first value and the second value, the A first portion is the second value and the remaining portion is the first value; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first message in the second switching interval. A part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, the method further includes: determining the first part as a second value, the remaining part as a first value, and The third switching interval is the difference between the first value and the second value;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the length of time the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the length of the fourth carrier. The length of time the carrier is interrupted during the process of switching to the second carrier; wherein the first value is the length of time the terminal equipment adjusts the radio frequency link between the two carriers, and the second value is the first The difference between TA and the second TA.
The method according to claim 1, 8, or 9, characterized in that, according to the first message, switching from the first carrier set to the second carrier set includes:

The third identifier is the identifier of the first TA, the fourth identifier is the identifier of the first TA, switching from the first carrier to the third carrier, and switching from the fourth carrier to the second carrier; or,

The third identifier is the identifier of the second TA, the fourth identifier is the identifier of the second TA, switching from the fourth carrier to the second carrier, and switching from the first carrier to the third carrier; or,

The third identifier is the identifier of the first TA, the fourth identifier is the identifier of the second TA, switching from the first carrier to the second carrier, and switching from the fourth carrier to the third carrier; or,

The third identifier is the identifier of the second TA, the fourth identifier is the identifier of the first TA, switching from the fourth carrier to the third carrier, and switching from the first carrier to the second carrier.
The method according to any one of claims 1 to 10, characterized in that the method further includes:

Send a second message to the network device, where the second message includes one or more of the following information:

The terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed; or,

The terminal device supports communication through a radio frequency link other than the one radio frequency link during a radio frequency link switching process; or,

The terminal device supports communication through the one radio frequency link when the switching of one radio frequency link is completed and the switching of other radio frequency links except the one radio frequency link is not completed.
The method according to any one of claims 1 to 11, characterized in that the method further includes:

The first TA and the second TA are received from the network device.
A carrier switching method, characterized in that it is applied to network equipment, and the method includes:

Configure the first time advance TA and the second TA for the terminal device;

Send a first message to the terminal device;

Wherein, the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message instructs the terminal device to switch from the first carrier to the second carrier. The carrier corresponding to the minimum TA or the maximum TA in the carrier set, and/or the first message indicates a first identifier, and the first identifier is the identifier of the TA corresponding to a carrier in the second carrier set; or,

The first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message indicates that the terminal device corresponds to the minimum TA or the maximum TA in the first carrier set. The carrier is switched to the first carrier, and/or the first message indication includes a second identifier, and the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or,

The first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device selects a minimum TA from the first carrier set. Or the carrier corresponding to the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or the first message indicates a third identifier and a fourth identifier, and the third identifier is the third identifier. An identifier of a TA corresponding to a carrier in a carrier set, where the fourth identifier is an identifier of a TA corresponding to a carrier in the second carrier set;

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the The second TA.
The method according to claim 13, characterized in that:

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier before carrier switching, or is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first The switching interval is configured on the carrier before carrier switching, or on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates The first part of the first switching interval is configured on the carrier before carrier switching, and the remaining part of the first switching interval except the first part is configured on the largest TA corresponding to the second carrier set. on the carrier;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process between two carriers.
The method according to claim 13 or 14, characterized in that the first identification is the identification of the first TA or the identification of the second TA.
The method according to claim 13, characterized in that:

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or on the carrier after carrier switching; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the first The message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on On the carrier corresponding to the largest TA in the first carrier set; or,

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier. on the carrier after wave switching;

Wherein, the first switching interval is a time period for the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier.
The method according to claim 13 or 16, characterized in that the second identification is the identification of the first TA or the identification of the second TA.
The method according to claim 13, characterized in that:

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; or,

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and in the third switching interval except the The remaining part other than the first part is configured on the carrier corresponding to the largest TA in the second carrier set; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first message in the second switching interval. A part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the length of time the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the length of the fourth carrier. The length of time the carrier is interrupted during switching to the second carrier.
The method according to claim 13 or 18, characterized in that,

The third identification is the identification of the first TA, and the fourth identification is the identification of the first TA; or,

The third identification is the identification of the second TA, and the fourth identification is the identification of the second TA; or,

The third identification is the identification of the first TA, and the fourth identification is the identification of the second TA; or,

The third identification is the identification of the second TA, and the fourth identification is the identification of the first TA.
The method according to any one of claims 13 to 19, characterized in that the method further includes:

Receive a second message from the terminal device, the second message including one or more of the following information:

The terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed; or,

The terminal device supports communication through a radio frequency link other than the one radio frequency link during a radio frequency link switching process; or,

The terminal device supports communication through the one radio frequency link when the switching of one radio frequency link is completed and the switching of other radio frequency links except the one radio frequency link is not completed.
The method according to claim 20, wherein sending the first message to the terminal device includes:

According to the second message, the first TA and the second TA send the first message to the terminal device.
The method according to any one of claims 13 to 21, characterized in that configuring the first time advance TA and the second time advance TA for the terminal device includes:

Send the first TA and the second TA to the terminal device.
A carrier switching method, characterized in that it is applied to terminal equipment, and the method includes:

Send a second message to the network device, where the second message includes one or more of the following information:

The terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed; or,

The terminal device supports communication through a radio frequency link other than the one radio frequency link during a radio frequency link switching process; or,

The terminal device supports communication through the one radio frequency link when the switching of one radio frequency link is completed and the switching of other radio frequency links except the one radio frequency link is not completed.
The method of claim 23, further comprising:

receiving a first message from the network device;

According to the first message, switch from the first carrier set to the second carrier set;

Wherein, the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message instructs the terminal device to switch from the first carrier to the second carrier. The carrier corresponding to the minimum timing advance TA or the maximum TA in the carrier set, and/or the first message indicates a first identifier, and the first identifier is the identifier of the TA corresponding to a carrier in the second carrier set; or ,

The first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message indicates that the terminal device corresponds to the minimum TA or the maximum TA in the first carrier set. The carrier is switched to the first carrier, and/or the first message indicates a second identifier, and the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or,

The first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device selects a minimum TA from the first carrier set. Or the carrier corresponding to the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or the first message indicates a third identifier and a fourth identifier, and the third identifier is the third identifier. An identifier of a TA corresponding to a carrier in a carrier set, where the fourth identifier is an identifier of a TA corresponding to a carrier in the second carrier set;

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the second TA.
The method according to claim 24, wherein the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set;

The switching from the first carrier set to the second carrier set according to the first message includes:

Switching from the first carrier to the second carrier or to the third carrier.
The method according to claim 25, characterized in that:

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier before carrier switching, and the method further includes: determining that the first switching interval is the difference between the first value and the second value, or is the first value; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first The switching interval is configured on the carrier before carrier switching. The method further includes: determining that the first switching interval is a first value, or the sum of the first value and the second value; or,

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the method further includes: determining the first switching interval as the difference between the first value and the second value; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the method further includes: determining that the first switching interval is a first value; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates The first part of the first switching interval is configured on the carrier before carrier switching, and the remaining part of the first switching interval except the first part is configured on the largest TA corresponding to the second carrier set. On the carrier, the method further includes: determining the first part to be a second value and the remaining part to be a first value, or determining the first part to be a first value and the remaining part to be a second value;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process of the two carriers, the first value is the length of time the terminal equipment adjusts the radio frequency link between the two carriers, and the second value is the The difference between the first TA and the second TA.
The method according to any one of claims 24 to 26, wherein the switching from the first carrier set to the second carrier set according to the first message includes:

The first identifier is the identifier of the first TA, switching from the first carrier to the third carrier; or,

The first identifier is the identifier of the second TA, and the first carrier is switched to the second carrier.
The method according to claim 24, wherein the first message instructs the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set;

The switching from the first carrier set to the second carrier set according to the first message includes:

Switching from the second carrier or the third carrier to the first carrier.
The method according to claim 28, characterized in that:

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or is configured on the carrier after carrier switching, and the method further includes: determining the first switching interval to be a first value; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching. The method further includes: determining that the first switching interval is a first value and a first value. The difference between two values; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the first The message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on On the carrier corresponding to the largest TA in the first carrier set, the method further includes: determining the first part as a first value and the remaining part as the difference between the first value and the second value; or,

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier after the carrier switching. On the carrier, the method further includes: determining the first part to be a second value and the remaining part to be a first value, or determining the first part to be a first value and the remaining part to be a second value;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process of the two carriers, the first value is the length of time the terminal equipment adjusts the radio frequency link between the two carriers, and the second value is the The difference between the first TA and the second TA.
The method according to claim 24, 28 or 29, characterized in that, switching from the first carrier set to the second carrier set according to the first message includes:

The second identifier is the identifier of the first TA, switching from the third carrier to the first carrier; or,

The second identifier is the identifier of the second TA, which is switched from the second carrier to the first carrier.
The method according to claim 24, characterized in that the first message instructs the terminal device to select the terminal device from the first carrier set. The carrier corresponding to the minimum TA or the maximum TA in the second carrier set is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set;

The switching from the first carrier set to the second carrier set according to the first message includes:

Switch from the first carrier to the second carrier, and from the fourth carrier to the third carrier; or,

Handover from the first carrier to the third carrier, and from the fourth carrier to the second carrier.
The method according to claim 31, characterized in that:

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the The third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set. The method further includes: determining that the second switching interval is the first The value and the third switching interval are the first value, or the second switching interval is determined to be the first value and the third switching interval is the sum of the first value and the second value; or,

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the The third switching interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set. The method further includes: determining that the second switching interval is the first The value and the third switching interval are the first value, or the second switching interval is determined to be the sum of the first value and the second value and the third switching interval is the first value; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, the method further includes: determining the second switching interval to The sum of the first value and the second value and the third switching interval is the difference between the first value and the second value; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, the method further includes: determining the second switching interval to The sum of the first value and the second value and the third switching interval are the difference between the first value and the second value, or the second switching interval is determined to be the sum of the first value and the second value and The third switching interval is the first value; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and in the third switching interval except the The remaining part except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. The method further includes: determining the second switching interval as the difference between the first value and the second value, the A first portion is the second value and the remaining portion is the first value; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first message in the second switching interval. A part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, the method further includes: determining the first part as a second value, the remaining part as a first value, and The third switching interval is the difference between the first value and the second value;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the duration during which the carrier is interrupted during the switching of the fourth carrier to the second carrier; Wherein, the first value is the duration for the terminal device to adjust the radio frequency link between the two carriers, and the second value is the difference between the first TA and the second TA.
The method according to claim 24, 31, or 32, wherein the switching from the first carrier set to the second carrier set according to the first message includes:

The third identifier is the identifier of the first TA, the fourth identifier is the identifier of the first TA, switching from the first carrier to the third carrier, and switching from the fourth carrier to the second carrier; or,

The third identifier is the identifier of the second TA, the fourth identifier is the identifier of the second TA, switching from the fourth carrier to the second carrier, and switching from the first carrier to the third carrier; or,

The third identifier is the identifier of the first TA, the fourth identifier is the identifier of the second TA, switching from the first carrier to the second carrier, and switching from the fourth carrier to the third carrier; or,

The third identifier is the identifier of the second TA, the fourth identifier is the identifier of the first TA, switching from the fourth carrier to the third carrier, and switching from the first carrier to the second carrier.
The method according to any one of claims 24 to 33, characterized in that the method further includes:

The first TA and the second TA are received from the network device.
A carrier switching method, characterized in that it is applied to network equipment, and the method includes:

Receive a second message from the terminal device, where the second message includes one or more of the following information:

The terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed; or,

The terminal device supports communication through a radio frequency link other than the one radio frequency link during a radio frequency link switching process; or,

The terminal device supports communication through the one radio frequency link when the switching of one radio frequency link is completed and the switching of other radio frequency links except the one radio frequency link is not completed.
The method of claim 35, further comprising:

Configuring a first time advance TA and a second time advance TA for the terminal device;

Send a first message to the terminal device;

Wherein, the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message instructs the terminal device to switch from the first carrier to the second carrier. The carrier corresponding to the minimum TA or the maximum TA in the carrier set, and/or the first message indicates a first identifier, and the first identifier is the identifier of the TA corresponding to a carrier in the second carrier set; or,

The first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message indicates that the terminal device corresponds to the minimum TA or the maximum TA in the first carrier set. The carrier is switched to the first carrier, and/or the first message indication includes a second identifier, and the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or,

The first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device selects a minimum TA from the first carrier set. Or the carrier corresponding to the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or the first message indicates a third identifier and a fourth identifier, and the third identifier is the third identifier. An identifier of a TA corresponding to a carrier in a carrier set, where the fourth identifier is an identifier of a TA corresponding to a carrier in the second carrier set;

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the The second TA.
The method according to claim 36, characterized in that:

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier before carrier switching, or is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first The switching interval is configured on the carrier before carrier switching, or on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is smaller than the second TA, and the first message indicates that the terminal device switches from the first carrier to the second carrier. The carrier corresponding to the largest TA in the carrier set, the first message also indicates that the first part in the first switching interval is configured on the carrier before carrier switching, and the first part in the first switching interval except the first part The remaining part is configured on the carrier corresponding to the largest TA in the second carrier set;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process between two carriers.
The method according to claim 36 or 37, characterized in that the first identification is the identification of the first TA or the identification of the second TA.
The method according to claim 36, characterized in that:

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or on the carrier after carrier switching; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the first The message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on On the carrier corresponding to the largest TA in the first carrier set; or,

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier after the carrier switching. on the carrier;

Wherein, the first switching interval is a time period for the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier.
The method according to claim 36 or 39, characterized in that the second identification is the identification of the first TA or the identification of the second TA.
The method according to claim 36, characterized in that:

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; or,

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to collect from the first carrier The carrier corresponding to the largest TA is switched to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates that the second switching interval is configured on the carrier corresponding to the largest TA in the first carrier set. The first part of the three switching intervals is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the third switching interval except the first part is configured on the second carrier on the carrier corresponding to the largest TA in the concentration; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first message in the second switching interval. A part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the length of time the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the length of the fourth carrier. The length of time the carrier is interrupted during switching to the second carrier.
The method according to claim 36 or 41, characterized in that,

The third identification is the identification of the first TA, and the fourth identification is the identification of the first TA; or,

The third identification is the identification of the second TA, and the fourth identification is the identification of the second TA; or,

The third identification is the identification of the first TA, and the fourth identification is the identification of the second TA; or,

The third identification is the identification of the second TA, and the fourth identification is the identification of the first TA.
The method according to any one of claims 36 to 42, characterized in that sending the first message to the terminal device includes:

According to the second message, the first TA and the second TA send the first message to the terminal device.
The method according to any one of claims 36 to 43, characterized in that configuring the first time advance TA and the second time advance TA for the terminal device includes:

Send the first TA and the second TA to the terminal device.
A communication device, characterized by including a processing module and a transceiver module;

Wherein, the transceiver module is used to receive the first message from the network device;

The processing module is configured to switch from the first carrier set to the second carrier set according to the first message;

Wherein, the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message instructs the communication device to switch from the first carrier to the second carrier. The carrier corresponding to the minimum timing advance TA or the maximum TA in the carrier set, and/or the first message indicates a first identifier, and the first identifier is the identifier of the TA corresponding to a carrier in the second carrier set; or ,

The first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message indicates that the communication device corresponds to the minimum TA or the maximum TA in the first carrier set. The carrier is switched to the first carrier, and/or the first message indicates a second identifier, and the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or,

The first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the communication device selects a minimum TA from the first carrier set. Or the carrier corresponding to the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or the first message indicates a third identifier and a fourth identifier, and the third identifier is the third identifier. An identifier of a TA corresponding to a carrier in a carrier set, where the fourth identifier is an identifier of a TA corresponding to a carrier in the second carrier set;

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the second TA.
The device according to claim 45, wherein the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set;

When switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

Switching from the first carrier to the second carrier or to the third carrier.
The device according to claim 46, characterized in that:

The first TA is larger than the second TA, and the first message indicates that the communication device switches from the first carrier to the second carrier. The carrier corresponding to the smallest TA in the carrier set, the first message also indicates that the first switching interval is configured on the carrier before carrier switching, and the processing module is further configured to: determine that the first switching interval is a first value and The difference between the second value, or the first value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first The switching interval is configured on the carrier before carrier switching, and the processing module is further configured to: determine that the first switching interval is a first value, or the sum of the first value and the second value; or,

The first TA is larger than the second TA, the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the processing module is further configured to: determine that the first switching interval is the difference between the first value and the second value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the processing module is further configured to: determine that the first switching interval is a first value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates The first part of the first switching interval is configured on the carrier before carrier switching, and the remaining part of the first switching interval except the first part is configured on the largest TA corresponding to the second carrier set. On the carrier, the processing module is further configured to: determine the first part to be a second value and the remaining part to be a first value, or determine the first part to be a first value and the remaining part to be a second value;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process of the two carriers, the first value is the length of time the communication device adjusts the radio frequency link between the two carriers, and the second value is the The difference between the first TA and the second TA.
The device according to any one of claims 45 to 47, wherein when switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

The first identifier is the identifier of the first TA, switching from the first carrier to the third carrier; or,

The first identifier is the identifier of the second TA, and the first carrier is switched to the second carrier.
The device according to claim 45, wherein the first message instructs the communication device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier;

When switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

Switching from the second carrier or the third carrier to the first carrier.
The device according to claim 49, characterized in that:

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or is configured on the carrier after carrier switching, and the processing module is further configured to: determine that the first switching interval is the first value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching, and the processing module is further configured to: determine that the first switching interval is a first value The difference from the second value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the first The message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on On the carrier corresponding to the largest TA in the first carrier set, the processing module is further configured to: determine that the first part is a first value and the remaining part is the difference between the first value and the second value; or ,

The first TA is larger than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier after the carrier switching. On the carrier, the processing module is further configured to: determine the first part to be a second value and the remaining part to be a first value, or determine the first part to be a first value and the remaining part to be a second value;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process of the two carriers, the first value is the length of time the communication device adjusts the radio frequency link between the two carriers, and the second value is the The difference between the first TA and the second TA.
The device according to claim 45, 49 or 50, characterized in that, according to the first message, switching from the first carrier set When switching to the second carrier set, the processing module is specifically used to:

The second identifier is the identifier of the first TA, switching from the third carrier to the first carrier; or,

The second identifier is the identifier of the second TA, which is switched from the second carrier to the first carrier.
The device according to claim 45, wherein the first message instructs the communication device to switch from a carrier corresponding to the smallest TA or the largest TA in the first carrier set to the smallest TA in the second carrier set. Or the carrier corresponding to the maximum TA;

When switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

Switch from the first carrier to the second carrier, and from the fourth carrier to the third carrier; or,

Handover from the first carrier to the third carrier, and from the fourth carrier to the second carrier.
The device according to claim 52, characterized in that:

The first TA is greater than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the The third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set. The processing module is further configured to: determine that the second switching interval is The first value and the third switching interval are the first value, or the second switching interval is determined to be the first value and the third switching interval is the sum of the first value and the second value; or ,

The first TA is greater than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the The third switching interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set. The processing module is further configured to: determine that the second switching interval is The first value and the third switching interval are the first value, or the second switching interval is determined to be the sum of the first value and the second value and the third switching interval is the first value; or ,

The first TA is larger than the second TA, and the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, the processing module is further configured to: determine the second switching The interval is the sum of the first value and the second value and the third switching interval is the difference between the first value and the second value; or,

The first TA is smaller than the second TA, and the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, the processing module is further configured to: determine the second switching The interval is the sum of the first value and the second value and the third switching interval is the difference between the first value and the second value, or the second switching interval is determined to be the sum of the first value and the second value. and the third switching interval is the first value; or,

The first TA is larger than the second TA, and the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and in the third switching interval except the The remaining part except the first part is configured on the carrier corresponding to the largest TA in the second carrier set, and the processing module is further configured to: determine the second switching interval as the difference between the first value and the second value, the first portion is the second value and the remaining portion is the first value; or,

The first TA is smaller than the second TA, and the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first message in the second switching interval. A part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on, and the third switching interval is configured placed on the carrier corresponding to the largest TA in the first carrier set, the processing module is further configured to: determine the first part as a second value, the remaining part as a first value, and the third switching interval is the difference between the first value and the second value;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the length of time the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the length of the fourth carrier. The length of time the carrier is interrupted during the process of switching to the second carrier; wherein the first value is the length of time the communication device adjusts the radio frequency link between the two carriers, and the second value is the first The difference between TA and the second TA.
The device according to claim 45, 52, or 53, wherein when switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

The third identifier is the identifier of the first TA, the fourth identifier is the identifier of the first TA, switching from the first carrier to the third carrier, and switching from the fourth carrier to the second carrier; or,

The third identifier is the identifier of the second TA, the fourth identifier is the identifier of the second TA, switching from the fourth carrier to the second carrier, and switching from the first carrier to the third carrier; or,

The third identifier is the identifier of the first TA, the fourth identifier is the identifier of the second TA, switching from the first carrier to the second carrier, and switching from the fourth carrier to the third carrier; or,

The third identifier is the identifier of the second TA, the fourth identifier is the identifier of the first TA, switching from the fourth carrier to the third carrier, and switching from the first carrier to the second carrier.
The device according to any one of claims 45 to 54, characterized in that the transceiver module is further used for:

Send a second message to the network device, where the second message includes one or more of the following information:

The communication device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed; or,

The communication device supports communication through a radio frequency link other than the one radio frequency link during a radio frequency link switching process; or,

The communication device supports communication through the one radio frequency link when the switching of one radio frequency link is completed but the switching of other radio frequency links except the one radio frequency link is not completed.
The device according to any one of claims 45 to 55, characterized in that the transceiver module is further used for:

The first TA and the second TA are received from the network device.
A communication device, characterized by including a transceiver module and a processing module;

Wherein, the processing module is used to configure the first time advance TA and the second TA for the terminal device;

The transceiver module is used to send a first message to the terminal device;

Wherein, the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message instructs the terminal device to switch from the first carrier to the second carrier. The carrier corresponding to the minimum TA or the maximum TA in the carrier set, and/or the first message indicates a first identifier, and the first identifier is the identifier of the TA corresponding to a carrier in the second carrier set; or,

The first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message indicates that the terminal device corresponds to the minimum TA or the maximum TA in the first carrier set. The carrier is switched to the first carrier, and/or the first message indication includes a second identifier, and the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or,

The first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device selects a minimum TA from the first carrier set. Or the carrier corresponding to the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or the first message indicates a third identifier and a fourth identifier, and the third identifier is the third identifier. An identifier of a TA corresponding to a carrier in a carrier set, where the fourth identifier is an identifier of a TA corresponding to a carrier in the second carrier set;

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the The second TA.
The device according to claim 57, characterized in that:

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier before carrier switching, or is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is smaller than the second TA, and the first message indicates that the terminal device switches from the first carrier to the second carrier. The first message also indicates that the first switching interval is configured on the carrier before carrier switching, or is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates The first part of the first switching interval is configured on the carrier before carrier switching, and the remaining part of the first switching interval except the first part is configured on the largest TA corresponding to the second carrier set. on the carrier;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process between two carriers.
The device according to claim 57 or 58, wherein the first identification is an identification of the first TA or an identification of the second TA.
The device according to claim 57, characterized in that:

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or on the carrier after carrier switching; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the first The message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on On the carrier corresponding to the largest TA in the first carrier set; or,

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier after the carrier switching. on the carrier;

Wherein, the first switching interval is a time period for the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier.
The device according to claim 57 or 60, characterized in that the second identification is an identification of the first TA or an identification of the second TA.
The device according to claim 57, characterized in that:

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; or,

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the second carrier set on the carrier corresponding to the smallest TA in ; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and in the third switching interval except the The remaining part other than the first part is configured on the carrier corresponding to the largest TA in the second carrier set; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first message in the second switching interval. A part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the length of time the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the length of the fourth carrier. The length of time the carrier is interrupted during switching to the second carrier.
The device according to claim 57 or 62, characterized in that:

The third identification is the identification of the first TA, and the fourth identification is the identification of the first TA; or,

The third identification is the identification of the second TA, and the fourth identification is the identification of the second TA; or,

The third identification is the identification of the first TA, and the fourth identification is the identification of the second TA; or,

The third identification is the identification of the second TA, and the fourth identification is the identification of the first TA.
The device according to any one of claims 57 to 63, characterized in that the transceiver module is further used for:

Receive a second message from the terminal device, the second message including one or more of the following information:

The terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed; or,

The terminal device supports communication through a radio frequency link other than the one radio frequency link during a radio frequency link switching process; or,

The terminal device supports communication through the one radio frequency link when the switching of one radio frequency link is completed and the switching of other radio frequency links except the one radio frequency link is not completed.
The device according to claim 64, wherein when sending the first message to the terminal device, the transceiver module is specifically configured to:

According to the second message, the first TA and the second TA send the first message to the terminal device.
The device according to any one of claims 57 to 65, characterized in that when configuring the first time advance TA and the second time advance TA for the terminal device, the transceiver module is also used to:

Send the first TA and the second TA to the terminal device.
A communication device, characterized by including a transceiver module;

Wherein, the transceiver module is used to send a second message to the network device, where the second message includes one or more of the following information:

The communication device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed; or,

The communication device supports communication through a radio frequency link other than the one radio frequency link during a radio frequency link switching process; or,

The communication device supports communication through the one radio frequency link when the switching of one radio frequency link is completed but the switching of other radio frequency links except the one radio frequency link is not completed.
The device according to claim 67, wherein the communication device further includes a processing module;

Wherein, the transceiver module is also used to receive the first message from the network device;

The processing module is configured to switch from the first carrier set to the second carrier set according to the first message;

Wherein, the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message refers to Indicates that the communication device switches from the first carrier to the carrier corresponding to the minimum time advance TA or the maximum TA in the second carrier set, and/or the first message indicates a first identifier, and the first identifier is the identifier of the TA corresponding to a carrier in the second carrier set; or,

The first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message indicates that the communication device corresponds to the minimum TA or the maximum TA in the first carrier set. The carrier is switched to the first carrier, and/or the first message indicates a second identifier, and the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or,

The first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the communication device selects a minimum TA from the first carrier set. Or the carrier corresponding to the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or the first message indicates a third identifier and a fourth identifier, and the third identifier is the third identifier. An identifier of a TA corresponding to a carrier in a carrier set, where the fourth identifier is an identifier of a TA corresponding to a carrier in the second carrier set;

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the second TA.
The device according to claim 68, wherein the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set;

When switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

Switching from the first carrier to the second carrier or to the third carrier.
The device according to claim 69, characterized in that:

The first TA is larger than the second TA, the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier before carrier switching, and the processing module is further configured to: determine that the first switching interval is the difference between the first value and the second value, or is the first value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first The switching interval is configured on the carrier before carrier switching, and the processing module is further configured to: determine that the first switching interval is a first value, or the sum of the first value and the second value; or,

The first TA is larger than the second TA, the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the processing module is further configured to: determine that the first switching interval is the difference between the first value and the second value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, and the processing module is further configured to: determine that the first switching interval is a first value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates The first part of the first switching interval is configured on the carrier before carrier switching, and the remaining part of the first switching interval except the first part is configured on the largest TA corresponding to the second carrier set. On the carrier, the processing module is further configured to: determine the first part to be a second value and the remaining part to be a first value, or determine the first part to be a first value and the remaining part to be a second value;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process of the two carriers, the first value is the length of time the communication device adjusts the radio frequency link between the two carriers, and the second value is the The difference between the first TA and the second TA.
The device according to any one of claims 68 to 70, wherein when switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

The first identifier is the identifier of the first TA, switching from the first carrier to the third carrier; or,

The first identifier is the identifier of the second TA, and the first carrier is switched to the second carrier.
The device according to claim 68, wherein the first message instructs the communication device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier;

When switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

Switching from the second carrier or the third carrier to the first carrier.
The device according to claim 72, characterized in that:

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured to be the smallest in the first carrier set On the carrier corresponding to the TA, or configured on the carrier after carrier switching, the processing module is further configured to: determine that the first switching interval is a first value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching, and the processing module is further configured to: determine that the first switching interval is a first value The difference from the second value; or,

The first TA is smaller than the second TA, the first message instructs the communication device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the first The message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on On the carrier corresponding to the largest TA in the first carrier set, the processing module is further configured to: determine that the first part is a first value and the remaining part is the difference between the first value and the second value; or ,

The first TA is larger than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier after the carrier switching. On the carrier, the processing module is further configured to: determine the first part to be a second value and the remaining part to be a first value, or determine the first part to be a first value and the remaining part to be a second value;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process of the two carriers, the first value is the length of time the communication device adjusts the radio frequency link between the two carriers, and the second value is the The difference between the first TA and the second TA.
The device according to claim 68, 72 or 73, wherein when switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

The second identifier is the identifier of the first TA, switching from the third carrier to the first carrier; or,

The second identifier is the identifier of the second TA, which is switched from the second carrier to the first carrier.
The device according to claim 68, wherein the first message instructs the communication device to switch from a carrier corresponding to the smallest TA or the largest TA in the first carrier set to the smallest TA in the second carrier set. Or the carrier corresponding to the maximum TA;

When switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

Switch from the first carrier to the second carrier, and from the fourth carrier to the third carrier; or,

Handover from the first carrier to the third carrier, and from the fourth carrier to the second carrier.
The device according to claim 75, characterized in that:

The first TA is greater than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the The third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set. The processing module is further configured to: determine that the second switching interval is The first value and the third switching interval are the first value, or the second switching interval is determined to be the first value and the third switching interval is the sum of the first value and the second value; or ,

The first TA is greater than the second TA, the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the The third switching interval is configured on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set. The processing module is further configured to: determine that the second switching interval is The first value and the third switching interval are the first value, or the second switching interval is determined to be the sum of the first value and the second value and the third switching interval is the first value; or ,

The first TA is larger than the second TA, and the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, the processing module is further configured to: determine the second switching The interval is the sum of the first value and the second value and the third switching interval is the difference between the first value and the second value; or,

The first TA is smaller than the second TA, and the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set, the processing module is further configured to: determine the second switching The interval is the sum of the first value and the second value and the third switching interval is the difference between the first value and the second value, or the second switching interval is determined to be the sum of the first value and the second value. and the third switching interval is the first value; or,

The first TA is larger than the second TA, and the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and in the third switching interval except the The remaining part except the first part is configured on the carrier corresponding to the largest TA in the second carrier set, and the processing module is further configured to: determine the second switching interval as the difference between the first value and the second value, the first portion is the second value and the remaining portion is the first value; or,

The first TA is smaller than the second TA, and the first message instructs the communication device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the communication device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first message in the second switching interval. A part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, the processing module is further configured to: determine that the first part is a second value, and the remaining part is a first value , and the third switching interval is the difference between the first value and the second value;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the length of time the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the length of the fourth carrier. The length of time the carrier is interrupted during the process of switching to the second carrier; wherein the first value is the length of time the communication device adjusts the radio frequency link between the two carriers, and the second value is the first The difference between TA and the second TA.
The device according to claim 68, 75, or 76, wherein when switching from the first carrier set to the second carrier set according to the first message, the processing module is specifically configured to:

The third identifier is the identifier of the first TA, the fourth identifier is the identifier of the first TA, switching from the first carrier to the third carrier, and switching from the fourth carrier to the second carrier; or,

The third identifier is the identifier of the second TA, the fourth identifier is the identifier of the second TA, switching from the fourth carrier to the second carrier, and switching from the first carrier to the third carrier; or,

The third identifier is the identifier of the first TA, the fourth identifier is the identifier of the second TA, switching from the first carrier to the second carrier, and switching from the fourth carrier to the third carrier; or,

The third identifier is the identifier of the second TA, the fourth identifier is the identifier of the first TA, switching from the fourth carrier to the third carrier, and switching from the first carrier to the second carrier.
The device according to any one of claims 68 to 77, characterized in that the transceiver module is further used for:

The first TA and the second TA are received from the network device.
A communication device, characterized by including a transceiver module;

Wherein, the transceiver module is used to receive a second message from the terminal device, where the second message includes one or more of the following information:

The terminal device supports communication through a radio frequency link other than the one radio frequency link before the switching of one radio frequency link is completed; or,

The terminal device supports communication through a radio frequency link other than the one radio frequency link during a radio frequency link switching process; or,

The terminal device supports communication through the one radio frequency link when the switching of one radio frequency link is completed and the switching of other radio frequency links except the one radio frequency link is not completed.
The device according to claim 79, wherein the communication device further includes a processing module;

Wherein, the processing module is used to configure a first time advance TA and a second time advance TA for the terminal device;

The transceiver module is also used to send a first message to the terminal device;

Wherein, the first carrier set includes a first carrier, the second carrier set includes a second carrier and a third carrier, and the first message instructs the terminal device to switch from the first carrier to the second carrier. The carrier corresponding to the minimum TA or the maximum TA in the carrier set, and/or the first message indicates a first identifier, and the first identifier is the identifier of the TA corresponding to a carrier in the second carrier set; or,

The first carrier set includes a second carrier and a third carrier, the second carrier set includes a first carrier, and the first message indicates that the terminal device corresponds to the minimum TA or the maximum TA in the first carrier set. The carrier is switched to the first carrier, and/or the first message indication includes a second identifier, and the second identifier is the identifier of the TA corresponding to a carrier in the first carrier set; or,

The first carrier set includes a first carrier and a fourth carrier, the second carrier set includes a second carrier and a third carrier, and the first message indicates that the terminal device selects a minimum TA from the first carrier set. Or the carrier corresponding to the maximum TA is switched to the carrier corresponding to the minimum TA or the maximum TA in the second carrier set, and/or the first message indicates a third identifier and a fourth identifier, and the third identifier is the third identifier. An identifier of a TA corresponding to a carrier in a carrier set, where the fourth identifier is an identifier of a TA corresponding to a carrier in the second carrier set;

Wherein, the first carrier corresponds to the first TA, the second carrier corresponds to the second TA, the third carrier corresponds to the first TA, and the fourth carrier corresponds to the The second TA.
The device according to claim 80, characterized in that:

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates The first switching interval is configured on the carrier before carrier switching, or is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first The switching interval is configured on the carrier before carrier switching, or on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the first carrier to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates The first part of the first switching interval is configured on the carrier before carrier switching, and the remaining part of the first switching interval except the first part is configured on the largest TA corresponding to the second carrier set. on the carrier;

Wherein, the first switching interval is the length of time the carrier is interrupted during the switching process between two carriers.
The device according to claim 80 or 81, characterized in that the first identification is an identification of the first TA or an identification of the second TA.
The device according to claim 80, characterized in that:

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, or on the carrier after carrier switching; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the first carrier, and the first message also indicates The first switching interval is configured on the carrier corresponding to the largest TA in the first carrier set, or is configured on the carrier after switching; or,

The first TA is smaller than the second TA, the first message instructs the terminal device to switch to the first carrier from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set, and the first The message also indicates that the first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on On the carrier corresponding to the largest TA in the first carrier set; or,

The first TA is larger than the second TA, the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the first carrier, and the first message also indicates The first part of the first switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part of the first switching interval except the first part is configured on the carrier after the carrier switching. on the carrier;

Wherein, the first switching interval is a time period for the terminal device to switch from the carrier corresponding to the minimum TA or the maximum TA in the first carrier set to the first carrier.
The device according to claim 80 or 83, characterized in that the second identification is an identification of the first TA or an identification of the second TA.
The device according to claim 80, characterized in that:

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; or,

The first TA is greater than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and/ Or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and the first message also indicates that the second switching interval is configured in the on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in on the carrier corresponding to the largest TA in the first carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in on the carrier corresponding to the largest TA in the second carrier set, and the third switching interval is configured on the carrier corresponding to the smallest TA in the second carrier set; or,

The first TA is larger than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set. The first message also indicates that the second switching interval is configured in On the carrier corresponding to the largest TA in the first carrier set, the first part of the third switching interval is configured on the carrier corresponding to the smallest TA in the first carrier set, and in the third switching interval except the The remaining part other than the first part is configured on the carrier corresponding to the largest TA in the second carrier set; or,

The first TA is smaller than the second TA, and the first message instructs the terminal device to switch from the carrier corresponding to the smallest TA in the first carrier set to the carrier corresponding to the largest TA in the second carrier set, and/or instruct the terminal device to switch from the carrier corresponding to the largest TA in the first carrier set to the carrier corresponding to the smallest TA in the second carrier set, and the first message also indicates the first message in the second switching interval. A part is configured on the carrier corresponding to the smallest TA in the first carrier set, and the remaining part in the second switching interval except the first part is configured on the carrier corresponding to the largest TA in the second carrier set. on, and the third switching interval is configured on the carrier corresponding to the largest TA in the first carrier set;

Wherein, the second switching interval is the duration during which the carrier is interrupted during the switching of the first carrier to the second carrier, and the third switching interval is the duration during which the fourth carrier switches to the third carrier. The length of time the carrier is interrupted during the process; or, the second switching interval is the length of time the carrier is interrupted during the switching of the first carrier to the third carrier, and the third switching interval is the length of the fourth carrier. The length of time the carrier is interrupted during switching to the second carrier.
The device according to claim 80 or 85, characterized in that:

The third identification is the identification of the first TA, and the fourth identification is the identification of the first TA; or,

The third identification is the identification of the second TA, and the fourth identification is the identification of the second TA; or,

The third identification is the identification of the first TA, and the fourth identification is the identification of the second TA; or,

The third identification is the identification of the second TA, and the fourth identification is the identification of the first TA.
The device according to any one of claims 80 to 86, wherein when sending the first message to the terminal device, the transceiver module is specifically used to:

According to the second message, the first TA and the second TA send the first message to the terminal device.
The device according to any one of claims 80 to 87, characterized in that when configuring the first time advance TA and the second time advance TA for the terminal device, the transceiver module is also used to:

Send the first TA and the second TA to the terminal device.
A communication system, characterized by including the communication device according to any one of claims 45 to 56, and/or including the communication device according to any one of claims 57 to 66; or including The communication device according to any one of claims 67 to 78, and/or comprising the communication device according to any one of claims 79 to 88.
A communication device, characterized by comprising a processor and a memory; wherein the memory is used to store one or more computer programs or instructions, and the processor is used to execute the one or more computers stored in the memory. Programs or instructions to cause the communication device to perform the method as described in any one of claims 1 to 12, or to perform the method as described in any one of claims 13 to 22, or to perform the method as claimed in any one of claims 23 to 22. The method of any one of claims 34, or performing the method of any one of claims 35 to 44.
A computer-readable storage medium, characterized in that computer programs or instructions are stored, and the computer programs or instructions are used to implement the method described in any one of claims 1 to 12, or to implement the methods described in claims 13 to 22 The method described in any one of the above, or the method described in any one of claims 23 to 34, or the method described in any one of claims 35 to 44.
A computer program product, characterized in that the computer program product includes a computer program, which when the computer program is run on a computer, causes the computer to perform the method according to any one of claims 1 to 12, Or perform the method as described in any one of claims 13 to 22, or perform the method as described in any one of claims 23 to 34, or perform the method as described in any one of claims 35 to 44 .