CN111756505B

CN111756505B - Method and equipment for switching partial bandwidth

Info

Publication number: CN111756505B
Application number: CN201910252625.XA
Authority: CN
Inventors: 刘显达; 刘鹍鹏; 张荻
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2021-10-22
Anticipated expiration: 2039-03-29
Also published as: WO2020199844A1; CN111756505A

Abstract

The application provides a method for switching a partial bandwidth BWP, comprising: the terminal equipment receives first Downlink Control Information (DCI) on a first BWP in a first time unit, wherein the first DCI contains first switching information for indicating switching to a second BWP and indicates that time domain offset information is K; the terminal device detects the second DCI on the second BWP in one or more time units between a second time unit and a third time unit, the second time unit being an mth time unit after the first time unit, the third time unit being a K-1 time unit after the first time unit, M being less than K and M, K being an integer greater than 0. The application provides a method and a device for switching partial bandwidth. The object is to realize effective BWP switching and improve the flexibility of BWP switching.

Description

Method and equipment for switching partial bandwidth

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for switching partial bandwidth.

Background

In the 5G NR system, in order to increase the transmission rate, the network device may configure a plurality of bandwidth parts (BWPs) for the terminal device through Radio Resource Control (RRC) signaling, where the BWP is a part of continuous frequency domain resources on one carrier and usually uses a resource block as a minimum frequency domain unit. Meanwhile, in order to reduce the power consumption of the terminal device for processing the BWP handover and ensure that the transmission bandwidth matches the transmission rate, the number of BWPs in the active state on the same carrier is 1. The network device may instruct the terminal device to switch between the BWPs through Downlink Control Information (DCI). Meanwhile, the terminal device may communicate information with a plurality of network devices in a cooperative relationship. Multiple cooperating network devices may send or receive messages in the same carrier, and since only one of the cooperating network devices activates BWP in the same carrier, it is difficult for the multiple cooperating network devices to uniformly instruct the terminal device to perform BWP handover. In a communication scenario where a terminal device communicates with multiple cooperating network devices, the terminal device cannot achieve effective BWP handover.

Disclosure of Invention

The application provides a method and a device for switching partial bandwidth, aiming at realizing effective BWP switching and improving the flexibility of BWP switching.

In a first aspect, a method for switching a partial bandwidth is provided, where the method includes: the terminal equipment receives first Downlink Control Information (DCI) on a first BWP in a first time unit, wherein the first DCI contains first switching information for indicating switching to a second BWP and indicates that time domain offset information is K; the terminal device detects second DCI on the second BWP in one or more time units between a second time unit and a third time unit, wherein the second time unit is an Mth time unit after the first time unit, the third time unit is a K-1 time unit after the first time unit, M is less than K, and M, K is an integer greater than 0.

In the embodiment of the present application, the terminal device may start receiving the signal immediately after completing the BWP handover, i.e. the terminal device may receive the signal before the indicated temporal position of the network device. Therefore, if the terminal device completes the BWP handover in advance, the terminal device can perform information transceiving, thereby avoiding wasting signaling resources and improving information receiving efficiency.

With reference to the first aspect, in certain implementations of the first aspect, a first set of control resources is used to carry the first DCI, and a second set of control resources is used to carry the second DCI, where the first set of control resources is a set of control resources on the first BWP, the second set of control resources is a set of control resources on the second BWP, and an association exists between the first set of control resources and the second set of control resources.

In the embodiment of the application, the terminal device may detect a part of resources on the new BWP instead of the whole resources according to the indication of the network device, which is beneficial to reduce the power consumption of the terminal device.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and the terminal device detects third DCI on the second BWP from the Nth time unit after the first time unit, wherein the resources occupied by the third DCI are located in a third control resource set different from the second control resource set, the third control resource set is the control resource set on the second BWP, and N is an integer greater than or equal to K.

In this embodiment, the terminal device may interact with multiple network devices on one BWP, and in the case that the terminal device performs BWP handover, the multiple network devices may perform BWP handover in a unified manner, so that all the network devices do not need to instruct the terminal device to perform BWP handover, and the terminal device may continue to interact with the multiple network devices on a new BWP according to the instruction of one of the network devices.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device receives data scheduled by the second DCI in one or more time units between the second time unit and a third time unit.

In the embodiment of the application, because the terminal device can transmit and receive information in advance, more options of transmitting urgent messages and data are provided for the network device, and the flexibility of information transmission and reception is further improved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device receives fourth DCI on a fourth set of control resources on the first BWP in a fourth time unit other than the first time unit, the fourth time unit being the Tth time unit before or after the first time unit, T being less than M and T being a positive integer; wherein the fourth DCI includes second switching information indicating switching to the second BWP and time domain offset information K1, a K1 th time unit after the fourth time unit being the same as a K time unit after the first time unit; or, the fourth DCI includes second switching information indicating switching to the second BWP and time domain offset information K2, the K2 th time unit after the fourth time unit being different from the K time unit after the first time unit; or, the fourth DCI includes third handover information indicating a handover to a third BWP, where the third BWP is different from the second BWP.

In this embodiment, the terminal device may receive DCI sent by different network devices in different time units. The terminal can execute BWP switching immediately after receiving DCI, and can also execute waiting to determine whether a more urgent instruction exists, thereby improving the flexibility of information receiving and transmitting.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal equipment judges whether the first DCI meets a first preset condition; and under the condition that the first DCI meets a first preset condition, the terminal equipment is switched from the first BWP to the second BWP according to the first DCI.

In this embodiment, when the terminal device receives contradictory DCI, the terminal device may determine whether to perform BWP handover according to a certain DCI according to a first preset condition. Accordingly, the network device may issue the DCI according to the first preset condition to ensure that the terminal device does not miss important DCI.

With reference to the first aspect, in certain implementations of the first aspect, the first DCI meeting a first preset condition includes: the identity of the K2 th time unit is greater than the identity of the Kth time unit; or the K2 th time unit identification is smaller than the K time unit identification; or the identifier of the first control resource set carrying the first DCI is smaller than the identifier of the fourth control resource set carrying the fourth DCI; or the identifier of the time unit receiving the first DCI is smaller than the identifier of the time unit receiving the fourth DCI; or the cell identifier carried by the first DCI is smaller than the cell identifier carried by the fourth DCI.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device receives fifth DCI on a fifth set of control resources on the first BWP within the first time unit, wherein the fifth DCI contains fourth handover information indicating a handover to the second BWP and time domain offset information K3, K3 being the same as K; or, the fifth DCI includes fourth switching information indicating switching to the second BWP and time domain offset information K4, where K4 is different from K; or the fifth DCI includes fifth handover information indicating handover to a fourth BWP, where the fourth BWP is different from the second BWP.

In this embodiment, the terminal device may receive DCI sent by different network devices in the same time unit. The terminal may perform BWP handover immediately after receiving DCI, so that information transceiving may be performed earlier on a new BWP.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal equipment judges whether the first DCI meets a second preset condition; and under the condition that the first DCI meets a second preset condition, the terminal equipment is switched from the first BWP to the second BWP according to the first DCI.

In this embodiment, when the terminal device receives contradictory DCI, the terminal device may determine whether to perform BWP handover according to a certain DCI according to a second preset condition. Accordingly, the network device may issue the DCI according to the second preset condition to ensure that the terminal device does not miss important DCI.

With reference to the first aspect, in certain implementations of the first aspect, the first DCI meeting a second preset condition includes: k is greater than K4; alternatively, K is less than K4; or the identifier of the first control resource set carrying the first DCI is smaller than the identifier of the fifth control resource set carrying the fifth DCI; alternatively, the first and second electrodes may be,

and the cell identification carried by the first DCI is smaller than the cell identification carried by the fifth DCI.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device determines a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, wherein the first countdown corresponds to the first cell, and the second countdown corresponds to the second cell; the terminal device performs a handover from the second BWP to a preset BWP if the first and/or second countdown meet/meets a third preset condition, where the first and/or second countdown meet/meets the third preset condition, including: the first countdown and the second countdown are both 0; or, the first cell is a primary cell, and the first countdown is 0; or, the second cell is a primary cell, and the second countdown is 0.

In this embodiment, due to the existence of the BWP timed handover mechanism, the BWP may determine whether to perform BWP handover according to a certain DCI according to a third preset condition. Accordingly, the network device may determine whether to continue to issue the DCI according to a third preset condition, so as to ensure that the terminal device does not miss important DCI.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device receives fourth DCI on a fourth set of control resources on the first BWP within a fourth time unit, the fourth DCI containing second handover information indicating a handover to the second BWP and time domain offset information K1, wherein K1 time units after the fourth time unit is later than K time units after the first time unit, K1 being an integer greater than 1; and the terminal equipment receives the data scheduled by the first DCI in a Kth time unit after the first time unit.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device receives data scheduled by the fourth DCI in a K1 time unit after the fourth time unit.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: the terminal device receives fifth DCI on a fifth set of control resources on the first BWP in a fifth time unit, the fifth DCI comprising third handover information indicating a handover to a third BWP, the third BWP being different from the second BWP, and time domain offset information K2, the K2 being an integer greater than 1; the terminal equipment receives data scheduled by the first DCI in a Kth time unit after the first time unit; wherein the first DCI satisfies a first preset condition, including: the identifier of a first control resource set carrying the first DCI is smaller than the identifier of a fifth control resource set carrying the fifth DCI; or the cell identifier carried by the first DCI is smaller than the cell identifier carried by the fifth DCI.

In a second aspect, a method for switching partial bandwidth is provided, including: the terminal device receives sixth Downlink Control Information (DCI) on a sixth control resource set of a fifth BWP, and receives seventh DCI on a seventh control resource set of the fifth BWP, wherein the sixth DCI contains sixth switching information indicating switching to the sixth BWP and a first time domain resource identifier indicating a resource carrying first data; the seventh DCI comprising seventh handover information indicating a handover to a sixth BWP and a second time-domain resource identifier indicating a resource carrying second data, the first time-domain resource identifier being different from the second time-domain resource identifier, or the seventh DCI comprising eighth handover information indicating a handover to a seventh BWP different from the sixth BWP; and under the condition that the sixth DCI meets a fourth preset condition, the terminal device switches from the fifth BWP to the sixth BWP according to the sixth DCI.

In this embodiment, when the terminal device receives contradictory DCI, the terminal device may determine whether to perform BWP handover according to a certain DCI according to a fourth preset condition. Accordingly, the network device may issue the DCI according to the fourth preset condition to ensure that the terminal device does not miss important DCI.

With reference to the second aspect, in certain implementations of the second aspect, the sixth DCI satisfying a fourth preset condition includes: the first time domain resource identifier is smaller than the second time domain resource identifier; or, the first time domain resource identifier is larger than the second time domain resource identifier; or the identifier of the sixth control resource set is smaller than the identifier of the seventh control resource set; or the identifier of the time unit receiving the sixth DCI is smaller than the identifier of the time unit receiving the seventh DCI; or the cell identifier carried by the sixth DCI is smaller than the cell identifier carried by the seventh DCI.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the terminal device detects an eighth DCI on the sixth BWP in one or more time units before the time unit identified by the first time domain resource identification.

With reference to the second aspect, in certain implementations of the second aspect, a sixth set of control resources is used to carry the sixth DCI, and an eighth set of control resources is used to carry the eighth DCI, where the sixth set of control resources is a set of control resources on the sixth BWP, the eighth set of control resources is a set of control resources on the eighth BWP, and an association exists between the sixth set of control resources and the eighth set of control resources.

With reference to the second aspect, in some implementations of the second aspect, the receiving the sixth DCI and the seventh DCI includes: receiving the sixth DCI and the seventh DCI in different time units.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the terminal device receives data scheduled by the eighth DCI in one or more time units prior to the time unit identified by the first time domain resource identification.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the terminal device determines a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, wherein the first countdown corresponds to the first cell, and the second countdown corresponds to the second cell; the terminal device performs a handover from the second BWP to a preset BWP if the first and/or second countdown meet/meets a third preset condition, where the first and/or second countdown meet/meets the third preset condition, including: the first countdown and the second countdown are both 0; or, the first cell is a primary cell, and the first countdown is 0; or, the second cell is a primary cell, and the second countdown is 0.

In a third aspect, a method for switching a partial bandwidth is provided, the method comprising: the method comprises the steps that a terminal device determines a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, wherein the first countdown corresponds to the first cell, and the second countdown corresponds to the second cell; the terminal device performs a handover from the current BWP to a preset BWP if the first and/or second countdown meet/meets a third preset condition, where the first and/or second countdown meet/meets the third preset condition, including: the first countdown and the second countdown are both 0; or, the first cell is a primary cell, and the first countdown is 0; or, the second cell is a primary cell, and the second countdown is 0.

In a fourth aspect, a terminal device for switching a partial bandwidth is provided, including:

a receiving unit, configured to receive first downlink control information DCI on a first BWP in a first time unit, where the first DCI includes first switching information indicating switching to a second BWP and indicates that time domain offset information is K; a processing unit for performing a handover from a first BWP to a second BWP; the receiving unit is further configured to detect a second DCI on the second BWP in one or more time units between a second time unit and a third time unit, the second time unit being an mth time unit after the first time unit, the third time unit being a K-1 time unit after the first time unit, M being less than K and M, K being an integer greater than 0.

With reference to the fourth aspect, in some implementations of the fourth aspect, a first set of control resources is used to carry the first DCI, and a second set of control resources is used to carry the second DCI, where the first set of control resources is a set of control resources on the first BWP, the second set of control resources is a set of control resources on the second BWP, and an association exists between the first set of control resources and the second set of control resources.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving unit is further configured to: and detecting third DCI on the second BWP from the Nth time unit after the first time unit, wherein resources occupied by the third DCI are located in a third control resource set different from the second control resource set, the third control resource set is the control resource set on the second BWP, and N is an integer greater than or equal to K.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving unit is further configured to: receiving data scheduled by the second DCI in one or more time units between the second time unit and a third time unit.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving unit is further configured to: receiving fourth DCI on a fourth set of control resources on the first BWP in a fourth time unit other than the first time unit, the fourth time unit being the Tth time unit before or after the first time unit, T being less than M and T being a positive integer; wherein the fourth DCI includes second switching information indicating switching to the second BWP and time domain offset information K1, a K1 th time unit after the fourth time unit being the same as a K time unit after the first time unit; or, the fourth DCI includes second switching information indicating switching to the second BWP and time domain offset information K2, the K2 th time unit after the fourth time unit being different from the K time unit after the first time unit; or, the fourth DCI includes third handover information indicating a handover to a third BWP, where the third BWP is different from the second BWP.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the processing unit is further configured to: judging whether the first DCI meets a first preset condition; in a case that the first DCI satisfies a first preset condition, the processing unit is further configured to: switching from the first BWP to the second BWP in accordance with the first DCI.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first DCI satisfying a first preset condition includes: the identity of the K2 th time unit is greater than the identity of the Kth time unit; or the K2 th time unit identification is smaller than the K time unit identification; or the identifier of the first control resource set carrying the first DCI is smaller than the identifier of the fourth control resource set carrying the fourth DCI; or the identifier of the time unit receiving the first DCI is smaller than the identifier of the time unit receiving the fourth DCI; or the cell identifier carried by the first DCI is smaller than the cell identifier carried by the fourth DCI.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving unit is further configured to: receiving fifth DCI on a fifth set of control resources on the first BWP within the first time unit, wherein the fifth DCI contains fourth handover information indicating a handover to the second BWP and time domain offset information K3, K3 being the same as K; or, the fifth DCI includes fourth switching information indicating switching to the second BWP and time domain offset information K4, where K4 is different from K; or the fifth DCI includes fifth handover information indicating handover to a fourth BWP, where the fourth BWP is different from the second BWP.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the processing unit is further configured to: the terminal equipment judges whether the first DCI meets a second preset condition; in a case that the first DCI satisfies a second preset condition, the processing unit is further configured to: switching from the first BWP to the second BWP in accordance with the first DCI.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first DCI satisfying a second preset condition includes: k is greater than K4; alternatively, K is less than K4; or the identifier of the first control resource set carrying the first DCI is smaller than the identifier of the fifth control resource set carrying the fifth DCI; or the cell identifier carried by the first DCI is smaller than the cell identifier carried by the fifth DCI.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the processing unit is further configured to: the terminal device determines a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, wherein the first countdown corresponds to the first cell, and the second countdown corresponds to the second cell; in a case that the first countdown and/or the second countdown meet a third preset condition, the processing unit is further configured to: performing a switch from the second BWP to a preset BWP, wherein the first countdown and/or the second countdown meet a third preset condition, including: the first countdown and the second countdown are both 0; or, the first cell is a primary cell, and the first countdown is 0; or, the second cell is a primary cell, and the second countdown is 0.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving unit is further configured to: receiving fourth DCI on a fourth set of control resources on the first BWP within a fourth time unit, the fourth DCI including second handover information indicating a handover to the second BWP and time domain offset information K1, wherein a K1 time unit after the fourth time unit is later than a K time unit after the first time unit, K1 being an integer greater than 1; the receiving unit is further configured to: receiving data scheduled by the first DCI in a Kth time unit after the first time unit.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving unit is further configured to: receiving data scheduled by the fourth DCI in a K1 time unit after the fourth time unit.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving unit is further configured to: receiving fifth DCI on a fifth set of control resources on the first BWP in a fifth time unit, the fifth DCI including third handover information indicating a handover to a third BWP, the third BWP being different from the second BWP, and time-domain offset information K2, the K2 being an integer greater than 1; the receiving unit is further configured to: receiving data scheduled by the first DCI in a Kth time unit after the first time unit; wherein the first DCI satisfies a first preset condition, including: the identifier of a first control resource set carrying the first DCI is smaller than the identifier of a fifth control resource set carrying the fifth DCI; or the cell identifier carried by the first DCI is smaller than the cell identifier carried by the fifth DCI.

In a fifth aspect, a terminal device for switching a partial bandwidth is provided, including: a receiving unit, configured to receive sixth downlink control information DCI on a sixth set of control resources of a fifth BWP, and receive seventh DCI on a seventh set of control resources of the fifth BWP, where the sixth DCI includes sixth handover information indicating handover to the sixth BWP and a first time domain resource identifier indicating a resource carrying first data; the seventh DCI comprising seventh handover information indicating a handover to a sixth BWP and a second time-domain resource identifier indicating a resource carrying second data, the first time-domain resource identifier being different from the second time-domain resource identifier, or the seventh DCI comprising eighth handover information indicating a handover to a seventh BWP different from the sixth BWP; a processing unit, configured to switch from the fifth BWP to the sixth BWP according to the sixth DCI if the sixth DCI satisfies a fourth preset condition.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the sixth DCI satisfying a fourth preset condition includes: the first time domain resource identifier is smaller than the second time domain resource identifier; or, the first time domain resource identifier is larger than the second time domain resource identifier; or the identifier of the sixth control resource set is smaller than the identifier of the seventh control resource set; or the identifier of the time unit receiving the sixth DCI is smaller than the identifier of the time unit receiving the seventh DCI; or the cell identifier carried by the sixth DCI is smaller than the cell identifier carried by the seventh DCI.

With reference to the fifth aspect, in some implementations of the fifth aspect, the receiving unit is further configured to: detecting eighth DCI on the sixth BWP for one or more time units prior to the time unit identified by the first time domain resource identification.

With reference to the fifth aspect, in certain implementations of the fifth aspect, a sixth set of control resources is used to carry the sixth DCI, and an eighth set of control resources is used to carry the eighth DCI, where the sixth set of control resources is a set of control resources on the sixth BWP, the eighth set of control resources is a set of control resources on the eighth BWP, and an association exists between the sixth set of control resources and the eighth set of control resources.

With reference to the fifth aspect, in some implementations of the fifth aspect, the receiving unit is specifically configured to: receiving the sixth DCI and the seventh DCI in different time units.

With reference to the fifth aspect, in some implementations of the fifth aspect, the receiving unit is further configured to: receiving data scheduled by the eighth DCI in one or more time units prior to the time unit identified by the first time domain resource identification.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the processing unit is further configured to: determining a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, the first countdown corresponding to the first cell and the second countdown corresponding to the second cell; in a case that the first countdown and/or the second countdown meet a third preset condition, the processing unit is further configured to: performing a switch from the second BWP to a preset BWP, wherein the first countdown and/or the second countdown meet a third preset condition, including: the first countdown and the second countdown are both 0; or, the first cell is a primary cell, and the first countdown is 0; or, the second cell is a primary cell, and the second countdown is 0.

In a sixth aspect, there is provided a terminal device for switching a partial bandwidth, comprising: a first processing unit, configured to determine a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, where the first countdown corresponds to the first cell and the second countdown corresponds to the second cell; a second processing unit, configured to execute a switch from a current BWP to a preset BWP if the first countdown and/or the second countdown meet a third preset condition, where the first countdown and/or the second countdown meet the third preset condition, and the switch includes: the first countdown and the second countdown are both 0; or, the first cell is a primary cell, and the first countdown is 0; or, the second cell is a primary cell, and the second countdown is 0.

In a seventh aspect, an embodiment of the present application provides a communication apparatus, which includes means for performing the first aspect or any possible implementation manner of the first aspect.

Alternatively, the communication apparatus of the seventh aspect may be a terminal device, or may be a component (e.g., a chip or a circuit, etc.) that can be used for the terminal device.

In an eighth aspect, embodiments of the present application provide a communication apparatus, which includes means for performing the second aspect or any possible implementation manner of the second aspect.

Alternatively, the communication apparatus of the eighth aspect may be a terminal device, or may be a component (e.g., a chip or a circuit, etc.) that can be used for a terminal device.

In a ninth aspect, embodiments of the present application provide a communication apparatus, which includes means for performing the third aspect or any possible implementation manner of the third aspect.

Alternatively, the communication apparatus of the ninth aspect may be a terminal device, or may be a component (e.g., a chip or a circuit, etc.) that can be used for a terminal device.

In a tenth aspect, an embodiment of the present application provides a storage medium storing instructions for implementing the method according to the first aspect or any one of the possible implementation manners of the first aspect.

In an eleventh aspect, the present application provides a storage medium storing instructions for implementing the method according to the second aspect or any one of the possible implementation manners of the second aspect.

In a twelfth aspect, an embodiment of the present application provides a storage medium storing instructions for implementing the method according to the third aspect or any possible implementation manner of the third aspect.

In a thirteenth aspect, the present application provides a computer program product comprising instructions for causing a computer to perform the method of the first aspect or any of its possible implementations when the computer program product runs on a computer.

In a fourteenth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the second aspect or any of the possible implementations of the second aspect.

In a fifteenth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the third aspect or any of the possible implementations of the third aspect.

In a sixteenth aspect, the present application provides a communication apparatus, including at least one processor and a communication interface, where the communication apparatus performs information interaction with other communication apparatuses, and when program instructions are executed in the at least one processor, the communication apparatus is enabled to implement the functions of the method according to the first aspect or any one of the possible implementation manners of the first aspect on the sending end device.

In a seventeenth aspect, the present application provides a communication apparatus, which includes at least one processor and a communication interface, where the communication interface is used for the communication apparatus to perform information interaction with other communication apparatuses, and when program instructions are executed in the at least one processor, the communication apparatus is enabled to implement the functions on the receiving end device in the method according to the second aspect or any possible implementation manner of the second aspect.

In an eighteenth aspect, the present application provides a communication apparatus, which includes at least one processor and a communication interface, where the communication apparatus performs information interaction with other communication apparatuses, and when program instructions are executed in the at least one processor, the communication apparatus is enabled to implement the functions on the sending-end device in the method according to the third aspect or any possible implementation manner of the third aspect.

In a nineteenth aspect, the present application provides a chip system, where the chip system includes at least one processor, and when program instructions are executed in the at least one processor, the functions of the method according to the first aspect or any one of the possible implementation manners of the first aspect on the sending-end device are implemented.

In a twentieth aspect, the present application provides a chip system, wherein the chip system includes at least one processor, and when a program instruction is executed in the at least one processor, the function on the receiving device in the method according to the second aspect or any possible implementation manner of the second aspect is implemented.

In a twenty-first aspect, the present application provides a chip system, where the chip system includes at least one processor, and when a program instruction is executed in the at least one processor, the function on the receiving device in the method according to the third aspect or any possible implementation manner of the third aspect is implemented.

Drawings

Fig. 1 is a schematic diagram of a scenario of a communication system to which an embodiment of the present application is applicable.

Fig. 2 is a schematic flow chart of a method for switching partial bandwidths according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a time unit for switching a partial bandwidth according to an embodiment of the present application.

Fig. 4 is a schematic flow chart of a method for switching partial bandwidths according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a time unit for switching a partial bandwidth according to an embodiment of the present application.

Fig. 6 is a schematic flow chart of a method for switching partial bandwidths according to an embodiment of the present application.

Fig. 7 is a schematic flow chart of a method for switching partial bandwidths according to an embodiment of the present application.

Fig. 8 is a schematic flow chart of a method for switching partial bandwidths according to an embodiment of the present application.

Fig. 9 is a schematic flow chart of a method for switching partial bandwidths according to an embodiment of the present application.

Fig. 10 is a schematic diagram of resources for switching partial bandwidths according to an embodiment of the present application.

Fig. 11 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Fig. 12 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Fig. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Fig. 14 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a. b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c can be single or multiple. In addition, in the embodiments of the present application, the words "first", "second", and the like do not limit the number and the execution order. In addition, in the embodiments of the present application, words such as "301", "402", "503" are merely used for identification for convenience of description, and do not limit the order in which steps are performed.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, a LTE Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD), a universal mobile telecommunications system (universal mobile telecommunications system, UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a fifth generation (5G) or a new radio NR (NR) system, and the like. In addition, the technical scheme of the embodiment of the application can be applied to future-oriented communication technology.

Terminal equipment in the embodiments of the present application may refer to user equipment, access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like, which are not limited in this embodiment.

The network device in this embodiment may be a device for communicating with a terminal device, where the network device may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) system or a Code Division Multiple Access (CDMA) system, may also be a base station (NodeB) in a Wideband Code Division Multiple Access (WCDMA) system, may also be an evolved NodeB (eNB) or eNodeB) in an LTE system, and may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a 5G network or a network device in a PLMN network that evolves in the future, such as a transmission reception node (TRP), and the like, which is not limited in the embodiment of the present application.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

Fig. 1 is a schematic diagram of a scenario of a communication system to which an embodiment of the present application is applicable. The terminal device can communicate with a plurality of network devices in a cooperative relationship. As shown in fig. 1, the communication system 100 may include a plurality of network devices (e.g., network device 101, network device 102, network device 103, network device 104, network device 105 in fig. 1) and a plurality of terminal devices (e.g., terminal device 121, terminal device 122 in fig. 1). The plurality of network devices constitute one or more cooperation sets, with one of which the terminal device can communicate. For example, the network device 101 and the network device 102 form a cooperation set1, and the network device 103, the network device 104 and the network device 105 form a cooperation set 2. The solid arrows in fig. 1 indicate that the terminal apparatus 121 communicates with the cooperation set1, and the dotted arrows indicate that the terminal apparatus 122 communicates with the cooperation set 2. Among them, multiple network devices in the cooperation set may cooperatively cover 1 serving cell (serving cell) (e.g., network device 101 and network device 102 cooperatively cover serving cell 111 in fig. 1) or multiple serving cells (e.g., network device 103, network device 104, network device 105 cooperatively cover serving cell 112 and serving cell 113 in fig. 1).

The network device may configure a plurality of BWPs to the terminal device through RRC signaling carrying the BWP configuration information, so that the terminal device may communicate with the network device through resources on the BWPs. Two network devices in a cooperating set may send or receive messages on different carriers or may send or receive messages on the same carrier. Whereas the number of BWPs in active state on the same carrier can only be 1.

There is a BWP switching mechanism that enables a unified switching of a terminal device and a network device in a cooperating set from a currently active BWP to another BWP and activates the other BWP. Active BWP refers to a terminal device receiving and transmitting information on the active BWP, for example, receiving data on PDSCH on the BWP, detecting and receiving DCI on a set of control resources on the BWP. The terminal device performs BWP handover, meaning that the terminal device transceives messages on one BWP before switching BWP and transceives messages on another BWP without transceiving messages on the previous BWP after switching BWP. The network device may send DCI carrying the BWP identity to the terminal device to instruct the terminal device to switch to the new BWP. In addition, the DCI further carries information indicating time domain offset information or a time domain starting position, so that the terminal device may receive data on a corresponding time domain resource according to the time domain offset information or the time domain starting position. Therefore, the terminal device may switch from the current BWP to the new BWP according to the indication of the DCI, and receive data on the new BWP. That is, the terminal device needs to complete the handover from the current BWP to the new BWP before receiving data on the new BWP.

It should be understood that, for convenience of description, the duration required for the terminal device to perform BWP handover is referred to as BWP handover latency. That is, the BWP switching latency refers to the total duration from the start time of performing BWP switching to the end time of performing BWP switching. In a normal case, during the BWP handover performed by the terminal device, the terminal device does not transmit or receive data or information. That is, the value of the time domain offset information indicated by the DCI tends to be larger than the BWP handover latency. Thus, the terminal device may not receive further indications of the network device in a timely manner.

After completing BWP handover, the terminal device may switch back to the preset BWP if the terminal device does not receive DCI on the new BWP for a long time. Thus, the end device may set a switch timer according to the configured timing length of the network device (e.g., 2ms, 5ms, 10ms …), and in the event that the switch timer counts down to 0, the end device may switch back from the new BWP to the preset BWP. The preset BWP may be a BWP predetermined in advance by the terminal device and the network device.

In one case, the terminal device communicates with two cooperating network devices on the same carrier. Network device 1 may transmit DCI1 on control-resource set (CORESET) 1 on BWP1, and network device 2 may transmit DCI2 on CORESET2 on BWP 1. Then, the terminal device may detect the resource on BWP to receive DCI1 transmitted by network device 1 and DCI2 transmitted by network device 2.

Due to message delay, delay sensitivity, etc., it is difficult for two cooperating network devices to instruct the end device to perform BWP handover in a timely and uniform manner. For example, during the course of performing BWP handover, the terminal device may not receive further instructions from the network device in a timely manner. For another example, network device 1 in the coordination set sending DCI1 instructs the end device to switch from BWP1 to BWP2, and since the message may be delayed, network device 2 in the coordination set may not be able to know the indication of network device 1 in time, and network device 2 may still want to communicate with the end device over BWP 1; if the end device performs a handover from BWP1 to BWP2 according to DCI1 at this time, the end device cannot communicate with network device 2; if the end device does not perform a handover from BWP1 to BWP2, the end device is unable to communicate with network device 1. For another example, network device 1 in the coordinated set sends DCI1 to instruct the terminal device to switch from BWP1 to BWP2, and network device 2 in the coordinated set sends DCI2 to instruct the terminal device to switch from BWP1 to BWP3, then the terminal device cannot normally perform BWP switching. For another example, the network device 1 in the coordination set continuously transmits DCI to the terminal device, and the network device 2 in the coordination set does not communicate with the terminal device for a long time; if the handover timer corresponding to network device 2 counts down to 0 and the terminal device is likely to switch from the current BWP to the preset BWP, the terminal device is unable to communicate with network device 1.

Based on this, the present application provides a method of switching BWPs. By the flexible BWP switching method, the terminal device is enabled to effectively execute BWP switching when confronted with the situation.

Fig. 2 is a schematic flowchart of a method for switching BWP according to an embodiment of the present application.

And 201, the first network device sends first DCI to the terminal device on the first BWP, wherein the first DCI contains first switching information indicating switching to the second BWP and indicates that the time domain offset information is K.

Accordingly, the terminal device receives the first DCI on the first BWP within a first time unit.

In other words, the first network device may instruct the terminal device to perform the handover from the first BWP to the second BWP through the first DCI. That is, prior to switching BWPs, the first BWP is an active BWP; after performing the switch from the first BWP to the second BWP, the second BWP is the active BWP. That is, the terminal device originally transmits and receives information on the first BWP, and after switching BWPs, the terminal device transmits and receives information on the second BWP. It should be understood that the first BWP and the second BWP are typically two different BWPs in one carrier. In the present application, for example, the descriptions of "first BWP" and "third BWP" refer to two different BWPs in one carrier.

The first handover information carried by the first DCI may indicate to the terminal device that the BWP to be handed over is the second BWP. The time domain offset information K carried by the first DCI may instruct the terminal device to start detecting or transmitting signals on resources of the second BWP from a kth time unit after the first time unit, for example, to receive data scheduled by the first DCI. It should be understood that the detection signal corresponds to the transmission signal, and the detection signal is taken as an example for explanation in the present application.

In other words, according to the indication of the first network device, the terminal device needs to complete the switch from the first BWP to the second BWP before the kth time unit, i.e. switch the first BWP to the active BWP and the second BWP to the active BWP. As mentioned in the foregoing, the terminal device needs a certain time to perform BWP handover, and the time required for the terminal device to complete BWP handover is the BWP handover delay. Therefore, the total duration of K time units should be greater than the BWP handover delay of the terminal device.

As mentioned above, the first network device may configure multiple BWPs to the terminal device through RRC signaling carrying the multiple BWP configuration information. Therefore, the first DCI may carry configuration information or identification of the second BWP, such as an ID of the second BWP and an index value corresponding to the second BWP. For example, the first DCI may carry an ID of the second BWP, such as 0 for BWP0 and 1 for BWP 1. As another example, the first DCI may carry an index value corresponding to the second BWP, such as 00 for BWP0, 01 for BWP1, 10 for BWP2, and 11 for BWP 3.

It should be understood that, after receiving the first DCI, the terminal device may or may not immediately perform the handover from the first BWP to the second BWP, and the handover from the first BWP to the second BWP requires a preparation time to be reserved for the terminal device to perform the handover of the radio frequency or the transceiving link.

In this application, a time unit may refer to a time slot, a subframe, a radio frame, a mini-slot (mini-slot), an OFDM symbol, and the like, and may also refer to other time units, which is not limited in this application.

202, the terminal device detects a second DCI on the second BWP in one or more time units between a second time unit and a third time unit, where the second time unit is an mth time unit after the first time unit, the third time unit is a K-1 time unit after the first time unit, M is less than K and M, K is an integer greater than 0.

In other words, the terminal device completes the switch from the first BWP to the second BWP before the second time unit, i.e. from the state where the active BWP is the first BWP to the state where the active BWP is the second BWP. From the beginning in the second time unit, the terminal device may detect the second DCI on the second BWP. Starting from the kth time unit after the first time unit, the terminal device may detect a signal on the second BWP according to the indication of the first DCI, e.g., receive data scheduled by the first DCI, or receive a new DCI. That is, the terminal device may detect a signal on the new BWP to receive information after completing the BWP handover. That is, the first network device may transmit the second DCI on the second BWP in a time unit between the second time unit and the third time unit. For example, the data scheduled by the first DCI is sent in the kth time unit after the first time unit, the BWP handover delay for the terminal device to perform BWP handover corresponds to M time units, and the first network device may determine the time unit for sending the second DCI according to the K-M time units.

It is to be understood that one or more time units between the second time unit and the third time unit refer to one or more of the time units in the number of time units from the second time unit to the third time unit. The plurality of time units comprise a second time unit and a third time unit.

It is understood that the time units between the a time units and the B time units may include a time units, B time units. Time units before the C time unit do not include the C time unit, and time units after the D time unit do not include the D time unit.

It should be understood that, in the embodiment of the present application, the terminal device receiving the information may refer to the terminal device performing detection and detecting the information. And the terminal device detecting information may mean that the terminal device performs detection and information is detected or not detected. For example, as shown in fig. 4, the terminal device may start to detect the second DCI from the second time unit, and receive the second DCI transmitted by the first network device in other time units after the third time unit, as shown in step 202 and step 203.

It should be understood that the second DCI may be transmitted by the first network device or may be transmitted by other network devices.

As shown in fig. 3, the terminal device receives the first DCI in the first time unit 301, and time domain offset information carried in the first DCI indicates that a kth time unit after the first time unit 301 is a time unit 304. The terminal device may perform a switch from the first BWP to the second BWP (i.e. change the active BWP from the first BWP to the second BWP) within the first time unit 301 and within one or more time units after the first time unit 301 and before the second time unit 302, e.g. the BWP switch may be performed within the first time unit 301. The terminal device may detect the second DCI on the second BWP in one or more of several time units from the second time unit 302 to the third time unit 303, e.g., the second DCI may be received in the second time unit 302. The terminal device may detect the signal on the second BWP starting from time unit 304, as may receive a new DCI or data scheduled by the first DCI within time unit 304.

Optionally, there is an association relationship between the first DCI and the second DCI.

Optionally, the first core set is configured to carry the first DCI, the second core set is configured to carry the second DCI, and an association relationship exists between the first core set and the second core set.

That is, the terminal device may detect the second DCI on a second CORESET carrying the second DCI. That is, the terminal device may only detect the second CORESET for one or more time units between the second time unit and the third time unit.

In one example, the association relationship between the first core set and the second core set may include that the first core set and the second core set both correspond to the same network device.

In one example, the association relationship between the first core set and the second core set may further include that the relative position of the first core set on the first BWP corresponds to the relative position of the second core set on the second BWP.

In one example, for another example, the association between the first core set and the second core set may further include that the identifier of the first core set corresponds to the identifier of the second core set. Wherein the identification may be an ID, an index value, etc.

The association between the first CORESET and the second CORESET may be indicated by the first network device. For example, the first DCI may carry configuration information of a second CORESET, and the terminal device may determine the second CORESET according to the first DCI and detect the second DCI on the second CORESET, and for example, the network device configures an association relationship between an index value of the first CORESET and an index value of the second CORESET in advance, and specifically, the first CORESET and the second CORESET are the same CORESET group.

The terminal device and the first network device and/or other network devices may agree in advance on the association between the first CORESET and the second CORESET. For example, the terminal device may determine the relative position of the second CORESET on the second BWP according to the relative position of the first CORESET on the first BWP and detect the second DCI on the second CORESET, and then determine the index number of the second CORESET according to the index number of the first CORESET, and then determine that the CORESET or the CORESET group for detecting the second DCI is associated with the CORESET or the CORESET group occupied by the first DCI indicating the BWP handover, for example.

Besides the association relationship between the first CORESET and the second CORESET, there may be another association relationship between the first DCI and the second DCI, where the association relationship is used to determine DCI that can be detected within a time domain offset period indicated by the DCI, for example, DCI indicating BWP handover occupies CORESET1, and DCI detected on CORESET associated with CORESET1 within the time period.

In one example, an association relationship exists between a port Radio Network Temporary Identity (RNTI) corresponding to the first DCI and an RNTI corresponding to the second DCI. For example, in a first time unit or a time unit before the first time unit, the terminal device receives a Radio Network Temporary Identity (RNTI) sent by the first network device, where the RNTI corresponds to the first DCI; the terminal device may detect the second DCI in the blind detection format specified by the RNTI in one or more time units between the second time unit and the third time unit.

In one example, the value or indicated information indicated by a particular field in the first DCI is the same as the value or indicated information indicated by that field in the second DCI, e.g., the CDM group of the DMRS indicated by the first DCI is the same as the CDM group of the DMRS indicated by the second DCI; or the HARQ process group indicated by the first DCI is the same as the HARQ process group indicated by the second DCI, or the PUCCH resource group indicated by the first DCI is the same as the PUCCH resource group indicated by the second DCI, or the TCI indicated by the first DCI and the TCI indicated by the second DCI are different TCI groups.

Optionally, the terminal device detects, starting from an nth time unit after the first time unit, a third DCI on the second BWP, where a resource occupied by the third DCI is located in a third CORESET different from the second CORESET, the third control resource set is a control resource set on the second BWP, and N is an integer greater than or equal to K.

Still taking fig. 3 as an example, in time unit 304 or in a time unit after time unit 304, the terminal device may detect the second DCI on a second CORESET of the second BWP and detect the third DCI on a third CORESET different from the second CORESET.

The second CORESET and the third CORESET correspond to two network devices. In other words, after the terminal device performs the handover from the first BWP to the second BWP as the active BWP according to the instruction of the first network device, the terminal device may receive, for example, DCI transmitted by the first network device and the second network device. That is, the BWP handover may be indicated to the terminal device by one of a plurality of network devices (e.g., network devices in a cooperating set), and the plurality of network devices may switch in a unified BWP in a cooperative manner.

It should be understood that detecting the third DCI on the third CORESET may refer to detecting the third DCI for all resources on the second BWP, where the resource carrying the third DCI is the third CORESET. Detecting the third DCI on the third CORESET, which may also refer to that the terminal device obtains the configuration information of the second CORESET and the configuration information of the third CORESET according to an indication (for example, RRC signaling configured with the configuration information of the CORESET) of the network device, detects the second DCI on the second CORESET according to the configuration information of the second CORESET, and detects the third DCI on the third CORESET according to the configuration information of the third CORESET.

It is to be understood that the second CORESET is different from the third CORESET, including the second CORESET having a different identity than the third CORESET. For example, the index value of the second CORESET is different from the index value of the third CORESET, and for example, the TCI configured by the second CORESET is different from the TCI configured by the third CORESET.

It should be understood that, as shown in steps 204 and 205 in fig. 4, the terminal device may detect the third DCI starting from, for example, time unit 304 in fig. 3, and receive the third DCI transmitted by the second network device in other time units after time unit 304.

Optionally, the terminal device receives data scheduled by the second DCI in one or more time units between the second time unit and a third time unit.

In other words, the terminal device receives the second DCI on the second BWP in the second time unit or in other time units after the second time unit, and according to the indication of the DCI, the terminal device may receive data scheduled by the second DCI in a time unit after the time unit in which the second DCI is received. That is, receiving data of the second DCI schedule may precede receiving data of the first DCI schedule.

Still taking fig. 3 as an example, data scheduled by the first DCI may be received earliest in a time unit 304 and the earliest time unit in which the second DCI is received is the second time unit 302, then data scheduled by the second DCI may be received earliest in the next time unit of the second time unit 302.

In fact, in addition to one or more time units between the second time unit and the third time unit, data scheduled by the second DCI may also be received in a time unit after the third time unit.

Optionally, the terminal device receives a fourth DCI on a fourth CORESET on the first BWP in a fourth time unit except the first time unit, where the fourth time unit is a T-th time unit before or after the first time unit, T is less than M, and T is a positive integer; wherein the fourth DCI includes second switching information indicating switching to the second BWP and time domain offset information K1, a K1 th time unit after the fourth time unit being the same as a K time unit after the first time unit; or, the fourth DCI includes second switching information indicating switching to the second BWP and time domain offset information K2, the K2 th time unit after the fourth time unit being different from the K time unit after the first time unit; or, the fourth DCI includes third handover information indicating a handover to a third BWP, where the third BWP is different from the second BWP.

Optionally, the terminal device receives, in a fourth time unit, fourth DCI on a fourth set of control resources on the first BWP, the fourth DCI including second handover information indicating handover to the second BWP and time domain offset information K1, where K1 time units after the fourth time unit are later than K time units after the first time unit, and K1 is an integer greater than 1; and the terminal equipment receives the data scheduled by the first DCI in a Kth time unit after the first time unit.

The fourth time unit may be the same as the first time unit or may be different from the first time unit. The fourth DCI and the first DCI are both DCIs received before the terminal device performs BWP handover.

For example, the fourth time unit is earlier than the first time unit. The terminal equipment receives the fourth DCI in a fourth time unit, and the terminal equipment can execute waiting; and then the terminal equipment receives the first DCI in the first time unit, wherein the first DCI and the fourth DCI both indicate to switch to the second BWP, namely both indicate that the BWP is activated to be the second BWP. Since the time unit indicating reception of data by the first DCI is earlier than the time unit indicating reception of data by the fourth DCI, the terminal device performs BWP switching according to the first DCI received later.

For another example, the fourth time unit is the first time unit. The terminal equipment receives the first DCI and the fourth DCI in a first time unit; the first DCI and the fourth DCI both indicate switching to the second BWP, i.e., both indicate that the active BWP is the second BWP. Since the time unit indicating reception of data by the first DCI is earlier than the time unit indicating reception of data by the fourth DCI, the terminal device performs BWP switching according to the first DCI received later.

For another example, the fourth time unit is later than the first time unit. The terminal equipment receives the first DCI in a first time unit, and can execute waiting; and then the terminal device receives fourth DCI in a fourth time unit, wherein the first DCI and the fourth DCI both indicate to switch to the second BWP, that is, both indicate that the active BWP is the second BWP. Since the time unit indicating reception of data by the first DCI is earlier than the time unit indicating reception of data by the fourth DCI, the terminal device performs BWP switching according to the first DCI received later.

In this way, the terminal device may not miss the data scheduled by the first DCI, and may not miss the data scheduled by the fourth DCI to a great extent.

Optionally, the terminal device receives data scheduled by the fourth DCI in a K1 time unit after the fourth time unit.

That is, regardless of the order in which the DCIs are received, the terminal device may perform BWP switching according to one DCI and receive data according to the indication of at least two DCIs.

Optionally, the terminal device receives a fifth DCI on a fifth set of control resources on the first BWP in a fifth time unit, where the fifth DCI includes third handover information indicating a handover to a third BWP and time domain offset information K2, where the third BWP is different from the second BWP, and K2 is an integer greater than 1; the terminal equipment receives data scheduled by the first DCI in a Kth time unit after the first time unit; wherein the first DCI satisfies a first preset condition, including: the identifier of a first control resource set carrying the first DCI is smaller than the identifier of a fifth control resource set carrying the fifth DCI; or the cell identifier carried by the first DCI is smaller than the cell identifier carried by the fifth DCI.

The fifth time unit may be the same as the first time unit or may be different from the first time unit. The fifth DCI and the first DCI are both DCIs received before the terminal device performs BWP handover. Since the fifth DCI and the first DCI indicate different BWPs for handover, the terminal device may need to discard one DCI and determine whether to perform BWP handover according to the indication of the other DCI.

For example, an identity of a first set of control resources carrying the first DCI is less than an identity of a fifth set of control resources carrying the fifth DCI. That is, more important or urgent DCI may be transmitted on a set of control resources, for example, with a smaller index value.

For another example, the DCI carrying the small cell id has a higher priority than the DCI carrying the large cell id. That is, it is more important to carry DCI with a small cell identity. Important or more urgent DCI may carry, for example, a smaller cell ID, which may be transmitted through a broadcast channel of the cell.

After receiving the first DCI and the fifth DCI, the terminal device may determine that the priority levels of the first DCI and the fifth DCI are low, thereby determining to discard one of the DCIs, that is, to perform BWP handover without complying with the BWP indicated by the discarded DCI.

As shown in fig. 6, in step 201, in a first time unit, the terminal device receives a first DCI on a first core set on a first BWP, where the first DCI includes first handover information indicating a handover to a second BWP. Step 206, before the terminal device performs BWP handover, in a fourth time unit adjacent to the first time unit, the terminal device receives a fourth DCI on a fourth core set on the first BWP, where the fourth DCI includes information indicating the BWP, and data scheduled by the first DCI is different from data scheduled by the fourth DCI. That is, the first DCI corresponds to the first network device, and the fourth DCI corresponds to the second network device.

In an example, as shown in fig. 5, a terminal device may receive a first DCI in a first time unit 501, where time domain offset information carried in the first DCI indicates that a kth time unit after the first time unit 501 is a time unit 505. The terminal device receives the fourth DCI in fourth time unit 502. The terminal device may complete the switch from the first BWP to the second BWP, i.e., change the active BWP from the first BWP to the second BWP, before the second time unit 503 according to the indication of the first DCI, and detect the second DCI on the second BWP in one or more time units of several time units from the second time unit 503 to the third time unit 504, as may be detected and received in the second time unit 503. The terminal device may detect the signal on the second BWP starting from time unit 505, as may receive the third DCI or the data scheduled by the first DCI within time unit 505. In this case, the terminal device performs a handover from the first BWP to the second BWP according to the first DCI received first, that is, changes the active BWP from the first BWP to the second BWP.

In an example, as shown in fig. 5, a terminal device may receive a first DCI in a first time unit 502, where time domain offset information carried in the first DCI indicates that a kth time unit after the first time unit 502 is a time unit 505. The terminal device receives the fourth DCI in the fourth time unit 501. The terminal device may complete the switch from the first BWP to the second BWP, i.e., change the active BWP from the first BWP to the second BWP, before the second time unit 503 according to the indication of the first DCI, and detect the second DCI on the second BWP in one or more time units of several time units from the second time unit 503 to the third time unit 504, as may be detected and received in the second time unit 503. The terminal device may detect the signal on the second BWP starting from time unit 505, as may receive the third DCI or the data scheduled by the first DCI within time unit 505. In this case, the terminal device performs a handover from the first BWP to the second BWP according to the first DCI received later, that is, changes the active BWP from the first BWP to the second BWP.

Since the terminal device has completed the handover from the first BWP to the second BWP within the mth time unit after the first time unit, the value of T is necessarily smaller than M.

The fourth DCI contains information indicating BWP and indicates time domain offset information.

In one example, the fourth DCI includes second switching information to switch to the second BWP and time domain offset information K1, the K1 time unit after the fourth time unit being the same as the K time unit after the first time unit. That is, the fourth DCI and the first DCI both instruct the terminal device to switch from the first BWP to the second BWP, that is, complete changing the active BWP from the first BWP to the second BWP, and the first DCI and the fourth DCI instruct the terminal device to receive the data of the first DCI and the data scheduled by the fourth DCI in the same time unit. Then, the terminal device performs a handover from the first BWP to the second BWP according to the indication that may be according to the first DCI and/or the fourth DCI, that is, changes the active BWP from the first BWP to the second BWP.

In one example, the fourth DCI includes second switching information indicating switching to the second BWP and time domain offset information K2, the K2 time unit after the fourth time unit being different from the K time unit after the first time unit. That is, both the fourth DCI and the first DCI instruct the terminal device to switch from the first BWP to the second BWP, but the first DCI and the fourth DCI instruct the terminal device to receive data scheduled by the first DCI and data scheduled by the fourth DCI in different time units. Assuming that data scheduled by the fourth DCI is transmitted earlier than data scheduled by the first DCI, if the terminal device performs switching from the first BWP to the second BWP according to the indication of the first DCI, the terminal device is likely to fail to normally receive the data scheduled by the fourth DCI.

In one example, the fourth DCI includes third handover information indicating a handover to a third BWP, the third BWP being different from the second BWP. That is, the fourth DCI and the first DCI instruct the terminal device to switch from the first BWP to a different BWP. For example, the first DCI indicates switching to the second BWP, and the fourth DCI indicates not switching, i.e., maintaining the active state of the first BPW. Then, if the terminal device performs a handover from the first BWP to the second BWP according to the indication of the first DCI, the terminal device is likely to fail to normally receive a message transmitted by the second network device, for example, data scheduled by the fourth DCI.

Optionally, the terminal device determines whether the first DCI meets a first preset condition; and under the condition that the first DCI meets a first preset condition, the terminal equipment is switched from the first BWP to the second BWP according to the first DCI.

In other words, in the case where the terminal device receives a plurality of mutually contradictory DCIs, if the terminal device performs or does not perform BWP switching according to the instruction of one of the DCIs, the terminal device may not normally receive information. The terminal device may refer to a more important one of the DCIs to determine whether or how to perform the handover of BWP. For example, in the case where the first DCI satisfies the first preset condition, the first DCI may be considered to be the most important DCI. For another example, the cell corresponding to the first DCI is a primary cell, and other secondary cells may comply with scheduling of the primary cell.

Optionally, the first DCI satisfies a first preset condition, including: the identity of the K2 th time unit is greater than the identity of the Kth time unit; or the K2 th time unit identification is smaller than the K time unit identification; or the identifier of the first CORESET carrying the first DCI is smaller than the identifier of the fourth CORESET carrying the fourth DCI; the identifier of a first CORESET carrying the first DCI is larger than the identifier of a fourth CORESET carrying the fourth DCI; or the identifier of the time unit receiving the first DCI is smaller than the identifier of the time unit receiving the fourth DCI; or the identifier of the time unit receiving the first DCI is larger than the identifier of the time unit receiving the fourth DCI; or the cell identifier carried by the first DCI is smaller than the cell identifier carried by the fourth DCI; or the cell identifier carried by the first DCI is greater than the cell identifier carried by the fourth DCI.

It should be understood that the identification of the time cell may be a slot number, a subframe number, etc. used in conjunction with an ID, index value, etc. that identifies the time cell.

In one example, the first DCI satisfies the first preset condition, and the identity of the K2 time unit is greater than the identity of the K time unit, i.e. the transmission time of the data scheduled by the first DCI is earlier than the transmission time of the data scheduled by the fourth DCI. Then, the terminal device performs the switching of BWP in accordance with the first DCI, and the terminal device may receive data scheduled by the first DCI and may receive data scheduled by the fourth DCI to a large extent. That is, the network device may preferentially indicate the time domain offset information having a smaller value when transmitting the DCI having higher importance.

In one example, the first DCI satisfies the first preset condition, and the identity of the K2 th time unit is greater than the identity of the K time unit, that is, the transmission time of the data scheduled by the first DCI is later than the transmission time of the data scheduled by the fourth DCI. Then, the terminal device performs the switching of BWP according to the first DCI, and the terminal device may receive data scheduled by the first DCI. Then, performing a BWP handover according to the first DCI may reserve a longer BWP handover time for the terminal device.

In one example, the first DCI satisfies a first preset condition, and an identifier of a first CORESET carrying the first DCI is smaller than an identifier of a fourth CORESET carrying the fourth DCI. For example, the identification value of CORESET may reflect a frequency band. For example, the identifier of the first CORESET is small, and the frequency band corresponding to the first CORESET is a relatively low frequency band; the fourth CORESET has a large identifier, and the frequency band corresponding to the fourth CORESET is a relatively high frequency band. That is, when transmitting DCI of higher importance, the network device may preferentially transmit DCI on the CORESET with a smaller identification value.

In one example, the first DCI satisfies a first preset condition, and an identifier of a first CORESET carrying the first DCI is greater than an identifier of a fourth CORESET carrying the fourth DCI. For example, the identifier of the first CORESET is large, and the frequency band corresponding to the first CORESET is a relatively high frequency band; the fourth CORESET has a small identifier, and the frequency band corresponding to the fourth CORESET is a relatively low frequency band. That is, when transmitting DCI of high importance, the network device may preferentially transmit DCI on the CORESET with a large identification value.

In one example, the first DCI satisfies a first preset condition, and the identifier of the time unit in which the terminal device receives the first DCI is smaller than the identifier of the time unit in which the fourth DCI is received. That is, the terminal device receives the first DCI first, and then receives the fourth DCI. The terminal device may perform the switching of BWP according to the DCI received first. That is, the network device can transmit DCI of high importance as early as possible.

In one example, the first DCI satisfies a first preset condition, and the identifier of the time unit in which the terminal device receives the first DCI is greater than the identifier of the time unit in which the fourth DCI is received. That is, the terminal device receives the fourth DCI first and then receives the first DCI. The terminal device may perform the switching of BWP according to the later received DCI. That is, the network device may slightly defer transmission when transmitting more important DCI to update the previous, relatively less important DCI.

In one example, the first DCI satisfies a first preset condition, and a cell identifier carried by the first DCI is smaller than a cell identifier carried by the fourth DCI. That is, the small identity of a cell may mean that the cell is more likely to be the primary cell. That is, when transmitting DCI of high importance, the network device may transmit DCI through the primary cell.

In one example, the first DCI satisfies a first preset condition, and a cell identifier carried by the first DCI is greater than a cell identifier carried by the fourth DCI. That is, a large identity of a cell may mean that the cell is more likely to be the primary cell. That is, when transmitting DCI of high importance, the network device may transmit DCI through the primary cell.

It should be understood that, while the terminal device performs BWP handover according to the first DCI, the network device side may take corresponding remedial measures, such as adjusting a coordination policy among multiple network devices.

Optionally, an association relationship exists between the fourth DCI and the third DCI.

Optionally, there is an association relationship between the fourth CORESET and the third CORESET.

It should be understood that the relationship between the fourth core set and the third core set is similar to the relationship between the first core set and the second core set in the foregoing, and is not described in detail herein.

Optionally, an association relationship exists between the RNTI corresponding to the fourth DCI and the RNTI corresponding to the third DCI.

It should be understood that the association relationship between the RNTI corresponding to the fourth DCI and the RNTI corresponding to the third DCI is similar to the association relationship between the RNTI corresponding to the first DCI and the RNTI corresponding to the second DCI in the foregoing, and is not described herein again.

Optionally, an association relationship exists between a port corresponding to the fourth DCI and a port corresponding to the third DCI.

It should be understood that the association relationship between the port corresponding to the fourth DCI and the port corresponding to the third DCI is similar to the association relationship between the port corresponding to the first DCI and the port corresponding to the second DCI, and is not described herein again.

Optionally, the terminal device receives a fifth DCI on a fifth set of control resources on the first BWP in the first time unit, where the fifth DCI includes fourth handover information indicating handover to the second BWP and time domain offset information K3, where K3 is the same as K; or, the fifth DCI includes fourth switching information indicating switching to the second BWP and time domain offset information K4, where K4 is different from K; alternatively, the fifth DCI includes fifth switching information indicating switching to a fourth BWP (i.e., the active BWP is the fourth BWP), where the fourth BWP is different from the second BWP.

In other words, before the terminal device performs BWP handover, the terminal device receives a first DCI on a first CORESET on the first BWP and receives a fifth DCI on a fifth CORESET on the first BWP, where the first DCI includes first handover information indicating handover to the second BWP, and the fifth DCI includes information indicating BWP, and data scheduled by the first DCI is different from data scheduled by the fifth DCI in the first time unit, as shown in step 207 in fig. 7. That is, the first DCI corresponds to the first network device, and the fifth DCI corresponds to the second network device.

Still taking fig. 3 as an example, the terminal device receives the first DCI and the fifth DCI in the first time unit 301, where the time domain offset information carried in the first DCI indicates that the kth time unit after the first time unit 301 is the time unit 304. The terminal device may complete the switch from the first BWP to the second BWP before the second time unit 302 according to the indication of the first DCI, and detect the second DCI on the second BWP in one or more of several time units from the second time unit 302 to the third time unit 303, as may be detected and received in the second time unit 302. The terminal device may detect the signal on the second BWP starting from time unit 304, as may the third DCI or the data scheduled by the first DCI received within time unit 304. In this case, the terminal device performs a handover of the first BWP to the second BWP according to the first DCI received first.

The fifth DCI includes information indicating BWP and time domain offset information.

In one example, the fifth DCI includes fourth switching information indicating switching to the second BWP and time domain offset information K3, K3 being the same as K. That is, the fifth DCI and the first DCI both instruct the terminal device to switch from the first BWP to the second BWP, i.e., activate the BWP to be changed from the first BWP to the second BWP, and the first DCI and the fifth DCI instruct the terminal device to receive the data of the first DCI and the data scheduled by the fifth DCI in the same time unit. Then, the terminal device may perform a handover from the first BWP to the second BWP according to the indication of the first DCI or the fifth DCI, i.e., the active BWP is changed from the first BWP to the second BWP.

In one example, the fifth DCI includes fourth switching information indicating switching to the second BWP and time domain offset information K4, K4 being different from K. That is, both the fifth DCI and the first DCI instruct the terminal device to switch from the first BWP to the second BWP, i.e., activate the BWP, and the first BWP is changed from the first BWP to the second BWP, but the first DCI and the fifth DCI instruct the terminal device to receive the data of the first DCI and the data scheduled by the fifth DCI in different time units. Assuming that data scheduled by the fifth DCI is transmitted earlier than data scheduled by the first DCI, if the terminal device performs a handover from the first BWP to the second BWP according to the indication of the first DCI, i.e., the active BWP is changed from the first BWP to the second BWP, the terminal device is likely to be unable to normally receive the data scheduled by the fifth DCI.

In one example, the fifth DCI includes fifth switching information indicating switching to a fourth BWP (i.e., the active BWP is a fourth BWP), the fourth BWP being different from the second BWP. That is, the fifth DCI and the first DCI instruct the terminal device to switch from the first BWP to a different BWP. For example, the first DCI indicates to switch to the second BWP, i.e., the active BWP is changed from the first BWP to the second BWP, and the fifth DCI indicates not to switch, i.e., the active state of the first BPW is maintained. Then, if the terminal device performs a handover from the first BWP to the second BWP according to the indication of the first DCI, that is, if the active BWP is changed from the first BWP to the second BWP, the terminal device is likely to fail to normally receive a message sent by the second network device, for example, data scheduled by the fifth DCI.

Optionally, the terminal device determines whether the first DCI meets a second preset condition; and under the condition that the first DCI meets a second preset condition, the terminal equipment is switched from the first BWP to the second BWP according to the first DCI.

In other words, the terminal device may receive a plurality of mutually contradictory DCIs, and if the terminal device randomly depends on one of the plurality of contradictory DCIs, the terminal device may not receive information normally. The terminal device may refer to a more important one of the DCIs to determine whether or how to perform the handover of BWP, i.e., change the active BWP. For example, in the case where the first DCI satisfies the second preset condition, the first DCI may be considered to be the most important DCI. For another example, the cell corresponding to the first DCI is a primary cell, and other secondary cells may comply with scheduling of the primary cell.

Optionally, the first DCI satisfies a second preset condition, including: k is greater than K4; alternatively, K is less than K4; or the identifier of the first control resource set carrying the first DCI is smaller than the identifier of the fifth control resource set carrying the fifth DCI; or the identifier of the first control resource set carrying the first DCI is larger than the identifier of the fifth control resource set carrying the fifth DCI; or the cell identifier carried by the first DCI is smaller than the cell identifier carried by the fifth DCI; or the cell identifier carried by the first DCI is larger than the cell identifier carried by the fifth DCI.

In one example, the first DCI satisfies the second preset condition, and K is less than K4. That is, the transmission time of data scheduled by the first DCI is earlier than the transmission time of data scheduled by the fifth DCI. Then, the terminal device performs the switching of BWP in accordance with the first DCI, and the terminal device may receive data scheduled by the first DCI and may receive data scheduled by the fifth DCI to a large extent. That is, the network device may preferentially indicate the time domain offset information having a smaller value when transmitting the DCI having higher importance.

In one example, the first DCI satisfies the second preset condition, and K is greater than K4. That is, the transmission time of data scheduled by the first DCI is later than the transmission time of data scheduled by the fifth DCI. Then, the terminal device performs the switching of BWP according to the first DCI, and the terminal device may receive data scheduled by the first DCI. Then, performing a BWP handover according to the first DCI may reserve a longer BWP handover time for the terminal device.

In one example, the first DCI satisfies a second preset condition, and an identifier of a first core set carrying the first DCI is smaller than an identifier of a fifth core set carrying the fifth DCI. For example, the identification value of CORESET may reflect a frequency band. For example, the identifier of the first CORESET is small, and the frequency band corresponding to the first CORESET is a relatively low frequency band; the mark of the fifth CORESET is large, and the frequency band corresponding to the fifth CORESET is a relatively high frequency band. That is, when transmitting DCI of higher importance, the network device may preferentially transmit DCI on the CORESET with a smaller identification value.

In one example, the first DCI satisfies a second preset condition, and an identifier of a first core set carrying the first DCI is greater than an identifier of a fifth core set carrying the fifth DCI. For example, the identifier of the first CORESET is large, and the frequency band corresponding to the first CORESET is a relatively high frequency band; the mark of the fifth CORESET is small, and the frequency band corresponding to the fifth CORESET is a relatively low frequency band. That is, when transmitting DCI of high importance, the network device may preferentially transmit DCI on the CORESET with a large identification value.

In one example, the first DCI satisfies the second preset condition, and the cell identifier carried by the first DCI is smaller than the cell identifier carried by the fifth DCI. That is, the small identity of a cell may mean that the cell is more likely to be the primary cell. That is, when transmitting DCI of high importance, the network device may transmit DCI through the primary cell.

In one example, the first DCI satisfies the second preset condition, and the cell identifier carried by the first DCI is greater than the cell identifier carried by the fifth DCI. That is, a large identity of a cell may mean that the cell is more likely to be the primary cell. That is, when transmitting DCI of high importance, the network device may transmit DCI through the primary cell.

Optionally, an association relationship exists between the fifth DCI and the third DCI.

Optionally, there is an association relationship between the fifth CORESET and the third CORESET.

It should be understood that the relationship between the fifth core set and the third core set is similar to the relationship between the first core set and the second core set in the foregoing, and is not described in detail herein.

Optionally, an association relationship exists between the RNTI corresponding to the fifth DCI and the RNTI corresponding to the third DCI.

It should be understood that the association relationship between the RNTI corresponding to the fifth DCI and the RNTI corresponding to the third DCI is similar to the association relationship between the RNTI corresponding to the first DCI and the RNTI corresponding to the second DCI in the foregoing, and is not described herein again.

Optionally, an association relationship exists between a port corresponding to the fifth DCI and a port corresponding to the third DCI.

It should be understood that the association relationship between the port corresponding to the fifth DCI and the port corresponding to the third DCI is similar to the association relationship between the port corresponding to the first DCI and the port corresponding to the second DCI, and is not described herein again.

Fig. 8 is a schematic flowchart of a BWP handover method according to an embodiment of the present application.

The first network device sends sixth DCI to the terminal device, where the sixth DCI includes sixth handover information indicating handover to a sixth BWP and a first time domain resource identifier indicating a resource carrying first data.

Accordingly, the terminal device receives the sixth DCI on the sixth core set of the fifth BWP.

And 802, the first network equipment sends seventh DCI to the terminal equipment.

Accordingly, the terminal device receives the seventh DCI on the seventh core set of the fifth BWP.

That is to say. The terminal device receives two different DCIs on the resources of two different frequency bands on the fifth BWP. The terminal device may receive the sixth DCI and the seventh DCI in the same time unit. The terminal device may also receive the sixth DCI and the seventh DCI in different time units, for example, the terminal device receives the sixth DCI first and then receives the seventh DCI.

Optionally, the receiving the sixth DCI and the seventh DCI includes: receiving the sixth DCI and the seventh DCI in different time units.

In one example, the seventh DCI includes seventh handover information indicating a handover to a sixth BWP and a second time domain resource identifier indicating a resource carrying second data, the first time domain resource identifier being different from the second time domain resource identifier.

That is, both the sixth DCI and the seventh DCI instruct the terminal device to switch from the fifth BWP to the sixth BWP, i.e., the second BWP is the active BWP, however, the time domain starting position of the resource carrying the data scheduled by the sixth DCI is different from the time domain starting position of the resource carrying the data scheduled by the seventh DCI. For example, the first network device instructs the terminal device to receive data scheduled by the sixth DCI in slot 1, and the second network device instructs the terminal device to receive data scheduled by the seventh DCI in slot 2 after slot 1.

In one example, the seventh DCI includes eighth switching information indicating switching to a seventh BWP different from the sixth BWP.

That is, the sixth DCI is different from the switching BWP indicated by the seventh DCI. For example, the sixth DCI instructs the terminal device to switch to BWP1 corresponding to band 1, and the seventh DCI instructs to switch to BWP2 corresponding to band 2. For another example, the sixth DCI instructs the terminal device to switch to BWP1 corresponding to frequency band 1, and the seventh DCI instructs not to perform BWP switching.

In this application, the information carried in the DCI may indicate time domain offset information and a time domain resource identifier, which may both be used to represent a starting position of a resource in a time domain. That is, the information carried in the DCI may indicate a starting position in a time domain of a resource carrying data scheduled by the DCI. The time domain offset information indicates an offset amount of a time unit from when the terminal device receives the DCI. The time domain resource identifier is an identifier of a certain time unit.

For example, the terminal device receives DCI at time unit 1, and the identifier of time unit 1 is 1. The DCI instructs the terminal device to receive data scheduled by the DCI in the kth time unit, which is after time unit 1 and identified as K + 1. The network device may indicate, through the DCI, a time unit or a time domain resource whose time domain offset information is K and domain resource identification is K + 1.

803, determining whether the sixth DCI satisfies a fourth preset condition.

And 804, when the sixth DCI satisfies a fourth preset condition, the terminal device switches from the fifth BWP to the sixth BWP according to the sixth DCI.

In other words, in the case where the terminal device receives a plurality of mutually contradictory DCIs, if the terminal device performs or does not perform BWP switching according to the instruction of one of the DCIs, the terminal device may not normally receive information. The terminal device may refer to a more important one of the DCIs to determine whether or how to perform the handover of BWP. For example, in the case where the sixth DCI satisfies the fourth preset condition, the sixth DCI may be considered to be the most important DCI. For another example, the cell corresponding to the sixth DCI is the primary cell, and other secondary cells may comply with the scheduling of the primary cell.

Optionally, the sixth DCI satisfies a fourth preset condition, including: the first time domain resource identifier is smaller than the second time domain resource identifier; or, the first time domain resource identifier is larger than the second time domain resource identifier; or the identifier of the sixth CORESET is smaller than the identifier of the seventh CORESET; or the identifier of the sixth CORESET is larger than the identifier of the seventh CORESET; or the identifier of the time unit receiving the sixth DCI is smaller than the identifier of the time unit receiving the seventh DCI; or the identifier of the time unit receiving the sixth DCI is larger than the identifier of the time unit receiving the seventh DCI; or the cell identifier carried by the sixth DCI is smaller than the cell identifier carried by the seventh DCI; and the cell identification carried by the sixth DCI is larger than the cell identification carried by the seventh DCI.

In one example, the sixth DCI satisfies the fourth preset condition, and the first time domain resource identifier is smaller than the second time domain resource identifier, that is, data scheduled by the sixth DCI is transmitted earlier than data scheduled by the seventh DCI, then the terminal device performs BWP handover according to the sixth DCI, and the terminal device may receive the data scheduled by the sixth DCI and may receive the data scheduled by the seventh DCI to a large extent. That is, when transmitting DCI of higher importance, the network device may preferentially indicate the time domain resource identifier having a smaller value.

In one example, the sixth DCI satisfies the fourth preset condition, and the first time domain resource identifier is greater than the second time domain resource identifier, that is, data scheduled by the sixth DCI is transmitted later than data scheduled by the seventh DCI, then the terminal device performs BWP handover according to the sixth DCI, and the terminal device may receive the data scheduled by the sixth DCI. Then, performing the BWP handover according to the sixth DCI may reserve a longer BWP handover time for the terminal device.

In one example, the sixth DCI satisfies a fourth preset condition, and an identifier of a sixth core set carrying the sixth DCI is smaller than an identifier of a seventh core set carrying the seventh DCI. For example, the identification value of CORESET may reflect a frequency band. For example, the identifier of the sixth CORESET is small, and the frequency band corresponding to the sixth CORESET is a relatively low frequency band; the seventh CORESET has a large identifier, and the frequency band corresponding to the seventh CORESET is a relatively high frequency band. That is, when transmitting DCI of higher importance, the network device may preferentially transmit DCI on the CORESET with a smaller identification value.

In one example, the sixth DCI satisfies a fourth preset condition, and an identifier of a sixth core set carrying the sixth DCI is greater than an identifier of a seventh core set carrying the seventh DCI. For example, the identifier of the sixth CORESET is large, and the frequency band corresponding to the sixth CORESET is a relatively high frequency band; the seventh CORESET has a small identifier, and the frequency band corresponding to the seventh CORESET is a relatively low frequency band. That is, when transmitting DCI of high importance, the network device may preferentially transmit DCI on the CORESET with a large identification value.

In one example, the sixth DCI satisfies a fourth preset condition, and the identifier of the time unit in which the terminal device receives the sixth DCI is smaller than the identifier of the time unit in which the seventh DCI is received. That is, the terminal device receives the sixth DCI first, and then receives the seventh DCI. The terminal device may perform the switching of BWP according to the DCI received first. That is, the network device can transmit DCI of high importance as early as possible.

In one example, the sixth DCI satisfies a fourth preset condition, and the identifier of the time unit in which the terminal device receives the sixth DCI is greater than the identifier of the time unit in which the seventh DCI is received. That is, the terminal device receives the seventh DCI first, and then receives the sixth DCI. The terminal device may perform the switching of BWP according to the later received DCI. That is, the network device may slightly defer transmission when transmitting more important DCI to update the previous, relatively less important DCI.

In one example, the sixth DCI satisfies the fourth preset condition, and the cell identifier carried by the sixth DCI is smaller than the cell identifier carried by the seventh DCI. That is, the small identity of a cell may mean that the cell is more likely to be the primary cell. That is, when transmitting DCI of high importance, the network device may transmit DCI through the primary cell.

In one example, the sixth DCI satisfies the fourth preset condition, and the cell identifier carried by the sixth DCI is greater than the cell identifier carried by the seventh DCI. That is, a large identity of a cell may mean that the cell is more likely to be the primary cell. That is, when transmitting DCI of high importance, the network device may transmit DCI through the primary cell.

It should be understood that, while the terminal device performs BWP handover according to the sixth DCI, the network device side may take corresponding remedial measures, for example, adjust the coordination policy among multiple network devices.

Further, the terminal device and the network device may agree with a priority rule, the network device issues the more important DCI to the terminal device according to the priority rule, and the terminal device performs BWP switching according to the more important DCI according to the priority rule.

Optionally, the terminal device receives data scheduled by the eighth DCI in one or more time units before the time unit identified by the first time domain resource identifier.

Optionally, there is an association relationship between the sixth DCI and the eighth DCI.

Optionally, the resource occupied by the sixth DCI is located in a sixth CORESET, the resource occupied by the eighth DCI is located in an eighth CORESET, and an association relationship exists between the sixth CORESET and the eighth CORESET.

It should be understood that the relationship between the sixth core set and the eighth core set is similar to the relationship between the first core set and the second core set in the foregoing, and is not described in detail herein.

Optionally, an association relationship exists between the RNTI corresponding to the sixth DCI and the RNTI corresponding to the eighth DCI.

It should be understood that the association relationship between the RNTI corresponding to the sixth DCI and the RNTI corresponding to the eighth DCI is similar to the association relationship between the RNTI corresponding to the first DCI and the RNTI corresponding to the second DCI in the foregoing, and is not described herein again.

Optionally, an association relationship exists between a port corresponding to the sixth DCI and a port corresponding to the eighth DCI.

It should be understood that the association relationship between the port corresponding to the sixth DCI and the port corresponding to the eighth DCI is similar to the association relationship between the port corresponding to the first DCI and the port corresponding to the second DCI, and is not described herein again.

Optionally, the terminal device detects an eighth DCI on the sixth BWP in one or more time units before the time unit identified by the first time domain resource identifier. The specific implementation manner may refer to step 202 in the embodiment shown in fig. 2, or refer to step 202 and step 204 in the embodiments shown in fig. 4, fig. 6, and fig. 7, which need not be described herein again.

Fig. 9 is a schematic flowchart of a BWP handover method according to an embodiment of the present application.

901, determining, by a terminal device, a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, where the first countdown corresponds to the first cell and the second countdown corresponds to the second cell;

902, the terminal device performs a handover from the current BWP to a preset BWP if the first and/or second countdown meets a third preset condition, wherein the first and/or second countdown meets the third preset condition, including: the first countdown and the second countdown are both 0; or, the first cell is a primary cell, and the first countdown is 0; or, the second cell is a primary cell, and the second countdown is 0.

Since there may be a plurality of network devices serving the terminal device, there may also be a plurality of serving cells interacting with the terminal device, such as the first cell and the second cell. The network device corresponding to the first cell configures the terminal device with the timing length corresponding to the first cell, so that the terminal device can set the first handover timer corresponding to the first cell. The network device corresponding to the second cell configures the terminal device with the timing length corresponding to the second cell, so that the terminal device can set a second handover timer corresponding to the second cell.

The first switching timer will be described as an example. In case the countdown (i.e. first countdown) of the first handover timer is 0, the second cell and the terminal device are likely to still be in a state of frequent interaction, e.g. the countdown (i.e. second countdown) of the second handover timer is not 0. At this time, the terminal device may switch the current BWP from the current BWP to the preset BWP according to the countdown of the first switching timer, i.e. the active BWP is changed from the current BWP to the preset BWP. Then the terminal device will not be able to communicate normally with the second cell. If the terminal device does not count down according to the first switching timer, that is, the terminal device does not switch the current BWP to the preset BWP, the terminal device will not be able to normally communicate with the first cell. Therefore, the terminal device needs to determine whether to perform BWP handover according to the first handover timer.

In one example, the terminal device performs a handover from the current BWP currently in the active state to the preset BWP if both the first countdown and the second countdown are 0. That is, in the case where the terminal device is configured with a plurality of switching timers, the terminal device needs to wait for the countdown of at least two switching timers to be 0.

Optionally, when the first countdown is 0, the terminal device sets a first switching timer corresponding to the first countdown to stop timing.

In one example, the first cell is a primary cell and the first countdown is 0.

In one example, the second cell is a primary cell and the second countdown is 0.

In other words, the terminal device performs handover from the current BWP to the preset BWP following the indication of the primary cell.

Optionally, the preset BWP corresponding to the first cell is the same as the preset BWP corresponding to the second cell.

Optionally, the first BWP timing configuration information indicates a timing duration that is the same as the timing duration indicated by the second BWP timing configuration information.

Optionally, the first cell and the second cell both communicate with the terminal device on the current BWP, and the terminal device may receive BWP timing configuration information sent by the first cell or the second cell, and determine the first BWP timing configuration information and the second BWP timing configuration information.

Alternatively, the current BWP may be the first BWP and/or the second BWP in the embodiments shown in fig. 2, 4, 6 or 7.

That is, before or after the terminal device performs the handover of the first BWP to the second BWP, the terminal device may perform the handover from the first BWP to the preset BWP according to the countdown of the BWP handover timer, when the first BWP is the current BWP. Before or after the terminal device performs the handover of the first BWP to the second BWP, the terminal device may perform the handover from the second BWP to the preset BWP according to the countdown of the BWP handover timer, where the second BWP is the current BWP.

Alternatively, the preset BWP may be the first BWP and/or the second BWP in the embodiments shown in fig. 2, 4, 6 or 7.

That is, before or after the terminal device performs the handover of the first BWP to the second BWP, the terminal device may perform the handover from the current BWP to the first BWP according to the countdown of the BWP handover timer, when the first BWP is the preset BWP. Before or after the terminal device performs the handover from the first BWP to the second BWP, the terminal device may perform the handover from the current BWP to the second BWP according to the countdown of the BWP handover timer, when the second BWP is the preset BWP.

Optionally, the current BWP may be the third BWP and/or the fourth BWP in the embodiment shown in fig. 8.

That is, before or after the terminal device performs the switching of the third BWP to the fourth BWP, the terminal device may perform the switching from the third BWP to the preset BWP according to the countdown of the BWP switching timer, when the third BWP is the current BWP. Before or after the terminal device performs the switch from the third BWP to the fourth BWP, the terminal device may perform the switch from the fourth BWP to the preset BWP according to the countdown of the BWP switch timer, where the fourth BWP is the current BWP.

Alternatively, the preset BWP may be the third BWP and/or the fourth BWP in the embodiment shown in fig. 8.

That is, before or after the terminal device performs the switching of the third BWP to the fourth BWP, the terminal device may perform the switching from the current BWP to the third BWP according to the countdown of the BWP switching timer, when the third BWP is the preset BWP. Before or after the terminal device performs the switching from the third BWP to the fourth BWP, the terminal device may perform the switching from the current BWP to the fourth BWP according to the countdown of the BWP switching timer, when the fourth BWP is the preset BWP.

The following takes the communication scenario shown in fig. 1 as an example, and further describes the technical solution of the present application with reference to fig. 10. It is understood that these specific examples are only for helping those skilled in the art to better understand the technical solutions of the present application, and are not intended to limit the technical solutions of the present application.

Fig. 10 is a schematic diagram illustrating that a terminal device according to an embodiment of the present application performs BWP handover. The rectangles in fig. 10 represent a resource unit on a CORESET within a time unit. The slashed rectangle 1001 indicates that the terminal device receives DCI on this resource unit. The rectangle 1002 filled with the lattice indicates that the resource is in an inactive state. The rectangle 1003 filled with horizontal straight lines indicates that the terminal device can receive data scheduled by DCI on the resource unit. The rectangle 1004 filled with diamonds indicates that the resource is in a fully activated state.

Initially, the terminal device communicates with network device 1 and network device 2 over BWP 1021.

The terminal device receives DCI1 at core set1011 in time unit n and DCI3 at core set1013 in time unit n. The DCI1 carries the first handover information and the first time domain offset information. The first switching information indicates switching to BWP1022, and the first time domain offset information indicates that the terminal device starts receiving data 1 from the 6 th time unit (i.e., time unit n +6) after time unit n. DCI3 carries third handover information indicating a handover to a different BWP than BWP 1022.

The terminal device may determine whether DCI1 satisfies the preset condition according to the identity of CORESET. For example, if the index value of CORESET1011 is smaller than the index value of CORESET1013, the terminal device may determine that DCI1 satisfies the preset condition.

The terminal device may determine whether DCI1 meets a preset condition according to the identifier of the cell carried by the DCI. For example, the cell identifier carried by the DCI1 is 1, and the cell identifier carried by the DCI3 is 3, and the terminal device may determine that the DCI1 satisfies the preset condition.

Further, the end device receives DCI2 on CORESET1012 within time unit n + 1. The DCI2 carries second handover information and second time domain offset information. The second switching information indicates switching to BWP1022, and the second time domain offset information indicates that the terminal device starts receiving data 2 from the 7 th time unit (i.e., time unit n +7) after time unit n.

The terminal device may determine whether DCI1 satisfies the preset condition according to the identity of CORESET. For example, if the index value of CORESET1011 is smaller than the index value of CORESET1012, the terminal device may determine that DCI1 satisfies the preset condition.

The terminal device may determine whether DCI1 satisfies a preset condition according to the time domain offset information. For example, the value of the first time domain offset information is smaller than the value of the second time domain offset information, and the terminal device may determine that the DCI1 satisfies the preset condition.

The terminal device may determine whether DCI1 satisfies the preset condition according to the identifier of the time unit in which the DCI is received. For example, the identifier of time unit n is smaller than the identifier of time unit n +1, and the terminal device may determine that DCI1 satisfies the preset condition.

The terminal device may determine whether DCI1 meets a preset condition according to the identifier of the cell carried by the DCI. For example, the cell identifier carried by the DCI1 is 1, and the cell identifier carried by the DCI2 is 2, and the terminal device may determine that the DCI1 satisfies the preset condition.

The terminal equipment can also judge that other DCI meets the preset condition. The following description will be made only by taking the case of determining that DCI1 satisfies the predetermined condition.

Thereafter, the terminal device may perform a handover from BWP1021 to BWP1022 at time unit n +3 according to the indication of DCI 1. It should be noted that, the resource located on BWP1022 before time unit n +3 is in the inactive state, and the terminal device does not send or receive messages on BWP1022 before time unit n + 3; after time unit n +3 and the resource located on BWP1021 is in an inactive state, the terminal device does not send and receive messages on BWP1021 after time unit n + 3. In time unit n +3, the terminal device performs BWP switching, and the resources on BWP1021 and BWP1022 are both inactive in time unit n + 3. As shown by rectangle 1002 in fig. 10.

After completing BWP handover, the terminal device may receive new DCI. As shown in fig. 10, the terminal device may receive DCI4 on CORESET1014 corresponding to CORESET1011 within time unit n + 4.

Also, the terminal device may receive data 4 scheduled by DCI4 within time unit n +5 as indicated by DCI4, as indicated by rectangle 1003 in fig. 10.

It should be understood that the terminal device may also receive a new DCI within time unit n + 5.

Since the time unit indicated by the DCI1 is time unit n +6, the terminal device may receive a signal corresponding to the DCI1 or CORESET1011 from time unit n +4 to time unit n +5, and BWP1022 may not be in a fully activated state for one or more time units from time unit n +4 to time unit n + 5. BWP1022 may be in a fully activated state from time unit n +6 as indicated by DCI 1.

Since the time unit indicated by the DCI2 is time unit n +7, the terminal device may receive data scheduled by the DCI2 on the CORESET1015 starting from time unit n + 7.

After that, the terminal device may receive DCI transmitted by a plurality of cells. Cell 1 has no communication with terminal equipment for a long time, while cell 2 communicates with terminal equipment frequently. BWP handover timer 1 corresponding to cell 1 counts down to 0, while BWP handover timer 2 corresponding to cell 2 has not counted down to 0.

The terminal device may determine whether cell 1 is a primary cell. The terminal device may switch from the current BWP to the preset BWP if cell 1 is the primary cell.

The terminal device may wait for BWP switch timer 2 to count down to 0. In the case where both the BWP switching timer 1 and the BWP switching timer 2 count down to 0, the terminal device may switch from the current BWP to the preset BWP.

Fig. 11 is a schematic structural diagram of a communication device provided according to an embodiment of the present application. The communication device may be a terminal device, or may be a component (e.g., a chip or a circuit) that can be used in a terminal device. As shown in fig. 11, the communication device 1100 may include a receiving module 1101 and a processing module 1102.

A receiving module 1101, configured to receive a first downlink control information DCI on a first BWP in a first time unit, where the first DCI includes first switching information indicating switching to a second BWP and indicates that time-domain offset information is K.

A processing module 1102 for performing a handover from a first BWP to a second BWP;

the receiving module 1101 is further configured to detect a second DCI on the second BWP in one or more time units between a second time unit and a third time unit, where the second time unit is an mth time unit after the first time unit, the third time unit is a K-1 time unit after the first time unit, M is smaller than K and M, K is an integer greater than 0.

The processing module 1102 may be implemented by a processor. The receiving module 1101 may be implemented by a receiver. Specific functions and advantages of the processing module 1102 and the receiving module 1101 can refer to the methods shown in fig. 2, fig. 4, fig. 6, fig. 7, fig. 8, and fig. 9, and are not described herein again.

In a possible embodiment, a communication device is also provided, which may be a terminal device or may be a component (e.g., a chip or a circuit, etc.) for a terminal device. The communication device may include a transceiver and a processor, and optionally, a memory. The transceiver may be configured to implement corresponding functions and operations corresponding to the receiving module and the sending module, and the processor may be configured to implement corresponding functions and operations of the processing module. The memory can be used for storing execution instructions or application program codes, and is controlled by the processor to execute, so as to implement the communication method provided by the above embodiment of the application; and/or may be used to temporarily store some data and instruction information, etc. The memory may exist independently of the processor, in which case the memory may be coupled to the processor via a communication line. In yet another possible design, the memory may be integrated with the processor, and the embodiment of the present application is not limited thereto.

Fig. 12 is a schematic structural diagram of a communication device provided according to an embodiment of the present application. The communication device may be a terminal device, or may be a component (e.g., a chip or a circuit) that can be used in a terminal device. As shown in fig. 12, the communication apparatus 1200 may include a receiving module 1201 and a processing module 1202.

A receiving module 1201, configured to receive sixth downlink control information DCI on a sixth set of control resources of a fifth BWP, and receive seventh DCI on a seventh set of control resources of the fifth BWP, where the sixth DCI includes sixth handover information indicating to handover to the sixth BWP and a first time domain resource identifier indicating a resource carrying first data; the seventh DCI includes seventh handover information indicating handover to a sixth BWP and a second time-domain resource identifier indicating a resource carrying second data, the first time-domain resource identifier being different from the second time-domain resource identifier, or the seventh DCI includes eighth handover information indicating handover to a seventh BWP different from the sixth BWP.

A processing module 1202, configured to switch from the fifth BWP to the sixth BWP according to the sixth DCI if the sixth DCI satisfies a fourth preset condition;

the receiving module 1201 is further configured to detect a second DCI on the second BWP in one or more time units between a second time unit and a third time unit, where the second time unit is an mth time unit after the first time unit, the third time unit is a K-1 time unit after the first time unit, M is smaller than K and M, K is an integer greater than 0.

The processing module 1202 may be implemented by a processor. The receiving module 1201 may be implemented by a receiver. Specific functions and advantages of the processing module 1202 and the receiving module 1201 can refer to the method shown in fig. 8, and are not described herein again.

Fig. 13 is a schematic structural diagram of a communication device provided according to an embodiment of the present application. The communication device may be a terminal device, or may be a component (e.g., a chip or a circuit) that can be used in a terminal device. As shown in fig. 13, the communication apparatus 1300 may include a first processing module 1301 and a second processing module 1302.

A first processing module 1301, configured to determine a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, where the first countdown corresponds to the first cell and the second countdown corresponds to the second cell.

A second processing module 1302, configured to execute a switch from the current BWP to a preset BWP if the first countdown and/or the second countdown meet a third preset condition, where the first countdown and/or the second countdown meet the third preset condition, and the method includes: the first countdown and the second countdown are both 0; or, the first cell is a primary cell, and the first countdown is 0; or, the second cell is a primary cell, and the second countdown is 0.

The first and second processing modules 1301 and 1302 may be implemented by a processor. Specific functions and beneficial effects of the first processing module 1301 and the second processing module 1302 may refer to the method shown in fig. 9, and are not described herein again.

Fig. 14 is a block diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 14, the terminal device includes a processor 1401, a memory 1402, a radio circuit, an antenna, and an input-output means. The processor 1401 may be used to process communication protocols and communication data, and to control the terminal device, execute software programs, process data of the software programs, and the like. The memory 1402 is primarily used to store software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.

When data needs to be transmitted, the processor 1401 performs baseband processing on the data to be transmitted, and outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signal and transmits the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 14. In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function may be regarded as the transceiver 1403 of the terminal device, and the processor having the processing function may be regarded as the processing unit of the terminal device. A transceiver may also be referred to as a transceiver unit, transceiver, transceiving means, etc. A processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Alternatively, a device for implementing a receiving function in the transceiver 1403 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver 1403 may be regarded as a transmitting unit, that is, the transceiver 1403 includes a receiving unit and a transmitting unit. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

The processor 1401, the memory 1402 and the transceiver 1403 communicate with each other via an internal connection path, passing control and/or data signals

The methods disclosed in the embodiments of the present invention described above may be applied to the processor 1401, or may be implemented by the processor 1401. Processor 1401 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by instructions in the form of hardware integrated logic circuits or software in the processor 1401.

The processor described in the embodiments of the present application may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a Random Access Memory (RAM), a flash memory, a read-only memory (ROM), a programmable ROM, an electrically erasable programmable memory, a register, or other storage media that are well known in the art. The storage medium is located in a memory, and a processor reads instructions in the memory and combines hardware thereof to complete the steps of the method.

Optionally, in some embodiments, the memory 1402 may store instructions for performing a method performed by the terminal device, such as the method illustrated in fig. 2. The processor 1401 can execute the instructions stored in the memory 1402, and in combination with other hardware (e.g. the transceiver 1403), to complete the steps performed by the terminal device in the method shown in fig. 2, and the specific working process and beneficial effects can be referred to the description in the embodiment shown in fig. 2.

Optionally, in some embodiments, the memory 1402 may store instructions for performing the method performed by the terminal device in the method illustrated in fig. 4. The processor 1401 can execute the instructions stored in the memory 1402, and in combination with other hardware (e.g. the transceiver 1403), to complete the steps performed by the terminal device in the method shown in fig. 4, and the specific working process and beneficial effects can be referred to the description in the embodiment shown in fig. 4.

Optionally, in some embodiments, the memory 1402 may store instructions for performing the method performed by the terminal device in the method illustrated in fig. 6. The processor 1401 can execute the instructions stored in the memory 1402, and in combination with other hardware (e.g. the transceiver 1403), to complete the steps performed by the terminal device in the method shown in fig. 6, and the specific working process and beneficial effects can be referred to the description in the embodiment shown in fig. 6.

Optionally, in some embodiments, the memory 1402 may store instructions for performing the method performed by the terminal device in the method illustrated in fig. 7. The processor 1401 can execute the instructions stored in the memory 1402, and in combination with other hardware (e.g. the transceiver 1403), to complete the steps performed by the terminal device in the method shown in fig. 7, and the specific working process and beneficial effects can be referred to the description in the embodiment shown in fig. 7.

Optionally, in some embodiments, the memory 1402 may store instructions for performing a method performed by the terminal device, such as the method illustrated in fig. 8. The processor 1401 can execute the instructions stored in the memory 1402, and in combination with other hardware (e.g. the transceiver 1403), to complete the steps performed by the terminal device in the method shown in fig. 8, and the specific working process and beneficial effects can be referred to the description in the embodiment shown in fig. 8.

Optionally, in some embodiments, the memory 1402 may store instructions for performing the method performed by the terminal device in the method illustrated in fig. 9. The processor 1401 can execute the instructions stored in the memory 1402, and in combination with other hardware (e.g. the transceiver 1403), to complete the steps performed by the terminal device in the method shown in fig. 9, and the specific working process and beneficial effects can be referred to the description in the embodiment shown in fig. 9.

The embodiment of the application also provides a chip, which comprises a transceiver unit and a processing unit. The transceiver unit can be an input/output circuit and a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip. The chip can execute the method of the terminal device side in the above method embodiments.

The embodiment of the present application further provides a computer-readable storage medium, on which instructions are stored, and when the instructions are executed, the method on the terminal device side in the above method embodiment is executed.

The embodiment of the present application further provides a computer program product containing instructions, where the instructions, when executed, perform the method on the terminal device side in the foregoing method embodiment.

Optionally, in some embodiments, the memory 1202 may store instructions for performing the method performed by the terminal device in the method shown in fig. 2. The processor 1201 may execute the instructions stored in the memory 1202 to complete the steps performed by the terminal device in the method shown in fig. 2 in combination with other hardware (e.g. the transceiver 1203), and specific working procedures and beneficial effects may refer to the description in the embodiment shown in fig. 2.

Optionally, in some embodiments, the memory 1202 may store instructions for performing the method performed by the terminal device in the method illustrated in fig. 4. The processor 1201 may execute the instructions stored in the memory 1202 to complete the steps performed by the terminal device in the method shown in fig. 4 in combination with other hardware (e.g. the transceiver 1203), and specific working procedures and beneficial effects may refer to the description in the embodiment shown in fig. 4.

Optionally, in some embodiments, the memory 1202 may store instructions for performing the method performed by the terminal device in the method illustrated in fig. 6. The processor 1201 may execute the instructions stored in the memory 1202 to complete the steps performed by the terminal device in the method shown in fig. 6 in combination with other hardware (e.g. the transceiver 1203), and specific working procedures and beneficial effects may refer to the description in the embodiment shown in fig. 6.

Optionally, in some embodiments, the memory 1202 may store instructions for performing the method performed by the terminal device in the method illustrated in fig. 7. The processor 1201 may execute the instructions stored in the memory 1202 to complete the steps performed by the terminal device in the method shown in fig. 7 in combination with other hardware (e.g., the transceiver 1203), and specific working procedures and beneficial effects may refer to the description in the embodiment shown in fig. 7.

Optionally, in some embodiments, the memory 1202 may store instructions for performing the method performed by the terminal device in the method illustrated in fig. 8. The processor 1201 may execute the instructions stored in the memory 1202 to complete the steps performed by the terminal device in the method shown in fig. 8 in combination with other hardware (e.g. the transceiver 1203), and specific working procedures and beneficial effects may refer to the description in the embodiment shown in fig. 8.

Optionally, in some embodiments, the memory 1202 may store instructions for performing the method performed by the terminal device in the method illustrated in fig. 9. The processor 1201 may execute the instructions stored in the memory 1202 to complete the steps performed by the terminal device in the method shown in fig. 9 in combination with other hardware (e.g., the transceiver 1203), and specific working procedures and beneficial effects may refer to the description in the embodiment shown in fig. 9.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method for switching fractional bandwidth BWP, comprising:

the terminal equipment receives first Downlink Control Information (DCI) on a first BWP in a first time unit, wherein the first DCI contains first switching information for indicating switching to a second BWP and indicates that time domain offset information is K;

the terminal device detects second DCI on the second BWP in one or more time units between a second time unit and a third time unit, wherein the second time unit is an Mth time unit after the first time unit, the third time unit is a K-1 time unit after the first time unit, M is less than K, and M, K is an integer greater than 0.

2. The method of claim 1, wherein a first set of control resources is used for carrying the first DCI, and a second set of control resources is used for carrying the second DCI, wherein the first set of control resources is a set of control resources on the first BWP, and the second set of control resources is a set of control resources on the second BWP, and wherein an association exists between the first set of control resources and the second set of control resources.

3. The method of claim 2, further comprising:

and the terminal device detects third DCI on the second BWP from the Nth time unit after the first time unit, wherein the resources occupied by the third DCI are located in a third control resource set different from the second control resource set, the third control resource set is the control resource set on the second BWP, and N is an integer greater than or equal to K.

4. The method according to any one of claims 1 to 3, further comprising:

the terminal device receives data scheduled by the second DCI in one or more time units between the second time unit and a third time unit.

5. The method according to any one of claims 1 to 3, further comprising:

the terminal device receives fourth DCI on a fourth set of control resources on the first BWP within a fourth time unit, the fourth DCI containing second handover information indicating a handover to the second BWP and time domain offset information K1, wherein K1 time units after the fourth time unit is later than K time units after the first time unit, K1 being an integer greater than 1;

and the terminal equipment receives the data scheduled by the first DCI in a Kth time unit after the first time unit.

6. The method of claim 5, further comprising: the terminal device receives data scheduled by the fourth DCI in a K1 time unit after the fourth time unit.

7. The method according to any one of claims 1 to 3, further comprising:

the terminal device receives fifth DCI on a fifth set of control resources on the first BWP in a fifth time unit, the fifth DCI comprising third handover information indicating a handover to a third BWP, the third BWP being different from the second BWP, and time domain offset information K2, the K2 being an integer greater than 1;

the terminal equipment receives data scheduled by the first DCI in a Kth time unit after the first time unit;

wherein the first DCI satisfies a first preset condition, including:

the identifier of a first control resource set carrying the first DCI is smaller than the identifier of a fifth control resource set carrying the fifth DCI; alternatively, the first and second electrodes may be,

8. The method according to any one of claims 1 to 3, 6, further comprising:

the terminal device determines a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, wherein the first countdown corresponds to the first cell, and the second countdown corresponds to the second cell;

the terminal device performs a handover from the second BWP to a preset BWP if a third preset condition is satisfied by the first countdown and/or the second countdown,

wherein, the first countdown and/or the second countdown meet a third preset condition, including:

the first countdown and the second countdown are both 0; alternatively, the first and second electrodes may be,

the first cell is a primary cell, and the first countdown is 0; alternatively, the first and second electrodes may be,

the second cell is a primary cell, and the second countdown is 0.

9. A terminal device for switching a fractional bandwidth BWP, comprising:

a receiving unit, configured to receive first downlink control information DCI on a first BWP in a first time unit, where the first DCI includes first switching information indicating switching to a second BWP and indicates that time domain offset information is K;

a processing unit for performing a handover from a first BWP to a second BWP;

the receiving unit is further configured to detect a second DCI on the second BWP in one or more time units between a second time unit and a third time unit, the second time unit being an mth time unit after the first time unit, the third time unit being a K-1 time unit after the first time unit, M being less than K and M, K being an integer greater than 0.

10. The terminal device of claim 9, wherein a first set of control resources is used to carry the first DCI, and a second set of control resources is used to carry the second DCI, wherein the first set of control resources is a set of control resources on the first BWP, and the second set of control resources is a set of control resources on the second BWP, and wherein an association exists between the first set of control resources and the second set of control resources.

11. The terminal device of claim 10,

the receiving unit is further configured to: and detecting third DCI on the second BWP from the Nth time unit after the first time unit, wherein resources occupied by the third DCI are located in a third control resource set different from the second control resource set, the third control resource set is the control resource set on the second BWP, and N is an integer greater than or equal to K.

12. The terminal device according to any of claims 9 to 11,

the receiving unit is further configured to: receiving data scheduled by the second DCI in one or more time units between the second time unit and a third time unit.

13. The terminal device according to any of claims 9 to 11,

the receiving unit is further configured to: receiving fourth DCI on a fourth set of control resources on the first BWP within a fourth time unit, the fourth DCI including second handover information indicating a handover to the second BWP and time domain offset information K1, wherein a K1 time unit after the fourth time unit is later than a K time unit after the first time unit, K1 being an integer greater than 1;

the receiving unit is further configured to: receiving data scheduled by the first DCI in a Kth time unit after the first time unit.

14. The terminal device of claim 13,

the receiving unit is further configured to: receiving data scheduled by the fourth DCI in a K1 time unit after the fourth time unit.

15. The terminal device according to any of claims 9 to 11,

the receiving unit is further configured to: receiving fifth DCI on a fifth set of control resources on the first BWP in a fifth time unit, the fifth DCI including third handover information indicating a handover to a third BWP, the third BWP being different from the second BWP, and time-domain offset information K2, the K2 being an integer greater than 1;

the receiving unit is further configured to: receiving data scheduled by the first DCI in a Kth time unit after the first time unit;

wherein the first DCI satisfies a first preset condition, including:

16. The terminal device according to any of claims 9 to 11, 14,

the processing unit is further to: determining a first countdown and a second countdown according to first BWP timing configuration information of a first cell and second BWP timing configuration information of a second cell, the first countdown corresponding to the first cell and the second countdown corresponding to the second cell;

in case the first and/or second countdown meets a third preset condition,

the processing unit is further to: performing a handover from the second BWP to a preset BWP,

the second cell is a primary cell, and the second countdown is 0.

17. A method for switching fractional bandwidth BWP, comprising:

the terminal device receives sixth Downlink Control Information (DCI) on a sixth control resource set of a fifth BWP, and receives seventh DCI on a seventh control resource set of the fifth BWP, wherein the sixth DCI contains sixth switching information indicating switching to the sixth BWP and a first time domain resource identifier indicating a resource carrying first data; the seventh DCI comprising seventh handover information indicating a handover to a sixth BWP and a second time-domain resource identifier indicating a resource carrying second data, the first time-domain resource identifier being different from the second time-domain resource identifier, or the seventh DCI comprising eighth handover information indicating a handover to a seventh BWP different from the sixth BWP;

and under the condition that the sixth DCI meets a fourth preset condition, the terminal device switches from the fifth BWP to the sixth BWP according to the sixth DCI.

18. The method of claim 17, wherein the sixth DCI satisfies a fourth preset condition, comprising:

the first time domain resource identifier is smaller than the second time domain resource identifier; alternatively, the first and second electrodes may be,

the identity of the sixth set of control resources is less than the identity of the seventh set of control resources; alternatively, the first and second electrodes may be,

the identification of the time unit receiving the sixth DCI is larger than the identification of the time unit receiving the seventh DCI; alternatively, the first and second electrodes may be,

and the cell identification carried by the sixth DCI is smaller than the cell identification carried by the seventh DCI.

19. The method according to claim 17 or 18, further comprising:

the terminal device detects an eighth DCI on the sixth BWP in one or more time units before the time unit identified by the first time domain resource identification.

20. The method of claim 19, wherein a sixth set of control resources is configured to carry the sixth DCI, and wherein an eighth set of control resources is configured to carry the eighth DCI, and wherein the sixth set of control resources is a set of control resources on the sixth BWP, and wherein the eighth set of control resources is a set of control resources on the sixth BWP, and wherein an association exists between the sixth set of control resources and the eighth set of control resources.

21. The method of any of claims 17, 18, and 20, wherein the receiving sixth DCI and seventh DCI comprises:

receiving the sixth DCI and the seventh DCI in different time units.

22. The method of claim 19, further comprising:

the terminal device receives data scheduled by the eighth DCI in one or more time units prior to the time unit identified by the first time domain resource identification.

23. The method of any one of claims 17, 18, and 20, further comprising:

the second cell is a primary cell, and the second countdown is 0.

24. A terminal device for switching a fractional bandwidth BWP, comprising:

a receiving unit, configured to receive sixth downlink control information DCI on a sixth set of control resources of a fifth BWP, and receive seventh DCI on a seventh set of control resources of the fifth BWP, where the sixth DCI includes sixth handover information indicating handover to the sixth BWP and a first time domain resource identifier indicating a resource carrying first data; the seventh DCI comprising seventh handover information indicating a handover to a sixth BWP and a second time-domain resource identifier indicating a resource carrying second data, the first time-domain resource identifier being different from the second time-domain resource identifier, or the seventh DCI comprising eighth handover information indicating a handover to a seventh BWP different from the sixth BWP;

a processing unit, configured to switch from the fifth BWP to the sixth BWP according to the sixth DCI if the sixth DCI satisfies a fourth preset condition.

25. The terminal device of claim 24, wherein the sixth DCI satisfies a fourth preset condition, and wherein the fourth preset condition includes:

26. The terminal device according to claim 24 or 25,

the receiving unit is further configured to: the terminal device detects an eighth DCI on the sixth BWP in one or more time units before the time unit identified by the first time domain resource identification.

27. The terminal device of claim 26, wherein a sixth set of control resources is configured to carry the sixth DCI, and wherein an eighth set of control resources is configured to carry the eighth DCI, and wherein the sixth set of control resources is a set of control resources on the sixth BWP, and wherein the eighth set of control resources is a set of control resources on the sixth BWP, and wherein an association exists between the sixth set of control resources and the eighth set of control resources.

28. The terminal device according to any of claims 24, 25, 27,

the receiving unit is specifically configured to: receiving the sixth DCI and the seventh DCI in different time units.

29. The terminal device of claim 26,

the receiving unit is further configured to: receiving data scheduled by the eighth DCI in one or more time units prior to the time unit identified by the first time domain resource identification.

30. The terminal device according to any of claims 24, 25, 27,

in case the first and/or second countdown meets a third preset condition,

the second cell is a primary cell, and the second countdown is 0.

31. A terminal device, characterized in that it comprises means for carrying out the method according to any one of claims 1 to 8, 17 to 23.

32. A communication apparatus, characterized in that the communication apparatus comprises: at least one processor and a communication interface for the communication device to interact with other communication devices, the program instructions when executed in the at least one processor causing the communication device to implement the functionality of the method according to any of claims 1 to 8, 17 to 23 on the terminal equipment.

33. A computer program storage medium, characterized in that the computer readable medium has stored program code which, when run on a computer, causes the computer to perform the method of any of claims 1 to 8, 17 to 23.

34. A chip system, characterized in that the chip system comprises at least one processor, which when executed by program instructions causes the functions of the method according to any one of claims 1 to 8 and 17 to 23 to be implemented on the terminal device.