CN114342500A

CN114342500A - Communication method, terminal equipment and network equipment

Info

Publication number: CN114342500A
Application number: CN201980098961.1A
Authority: CN
Inventors: 戴晶; 薛丽霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2022-04-12
Also published as: WO2021026926A1

Abstract

The application provides a communication method, which comprises the following steps: receiving first indication information on a first time domain resource and on a first partial bandwidth BWP, the first indication information indicating switching to a second BWP and indicating receiving or transmitting a first data channel on a second time domain resource, a frequency domain position and a bandwidth of the first BWP being the same as a frequency domain position and a bandwidth of the second BWP; and receiving or transmitting the target signal on the frequency domain resource corresponding to the first BWP or the second BWP on the time domain resource after the first time domain resource is ended and before the time slot where the second time domain resource is positioned is started. The application provides a communication method, terminal equipment and network equipment, and aims to reduce signal and data receiving and transmitting time delay and improve channel resource utilization rate.

Description

Communication method, terminal equipment and network equipment

Technical Field

The present application relates to the field of communications, and in particular, to a communication method, a terminal device, and a network device.

Background

To increase the transmission rate, the network device may configure a plurality of fractional Bandwidths (BWPs) for the terminal device through Radio Resource Control (RRC) signaling, where a BWP is a portion of continuous frequency domain resources on one carrier and usually uses a resource block as a minimum frequency domain unit. The network device may instruct the terminal device to switch between the BWPs through Downlink Control Information (DCI). The network device may also instruct, through the DCI, the terminal device to transmit and receive data on a Physical Downlink Shared Channel (PDSCH), or transmit data on a Physical Uplink Shared Channel (PUSCH).

The terminal device performs BWP handover, which requires a certain handover delay, and the terminal device may not perform transceiving during the handover delay. However, when the frequency domain positions of the two BWPs before and after the handover are the same as the configuration parameters such as bandwidth and subcarrier spacing, the actual handover delay required by the terminal device is short or 0; when the frequency domain positions and bandwidth configuration parameters of two BWPs before and after handover are different, the actual handover delay required by the terminal device is long. In order to ensure normal signaling, it is generally agreed that signaling is not performed until data scheduled by DCI for instructing BWP switching is received or transmitted. This means that even if the terminal device has completed the handover, the terminal device cannot perform signal transmission and reception as long as the interruption time is not reached. Therefore, the switching scheme is less flexible.

Disclosure of Invention

The application provides a communication method, terminal equipment and network equipment, which can provide a flexible signal receiving and transmitting mode.

In a first aspect, a communication method is provided, including: receiving first indication information on a first bandwidth part (BWP) on a first time domain resource, the first indication information indicating switching to a second BWP and indicating reception or transmission of a first data channel on a second time domain resource, a frequency domain position and a bandwidth of the first BWP being the same as a frequency domain position and a bandwidth of the second BWP; and receiving or transmitting a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts.

When the network device determines that the frequency domain position and bandwidth of the first BWP are the same as the frequency domain position and bandwidth of the second BWP, it may be considered that the terminal device transmits or receives the target signal before receiving the first data channel, thereby avoiding waste of signaling resources. Accordingly, the terminal device determines that the frequency domain position and bandwidth of the first BWP are the same as the frequency domain position and bandwidth of the second BWP, and may continue to receive or transmit the target signal on the new BWP before receiving or transmitting the first data channel, thereby avoiding waste of signaling resources and also avoiding introduction of additional increased data transmission delay. Because the network device and the terminal device can utilize the time domain resource after the first time domain resource is finished and before the time slot of the second time domain resource is started, the method for receiving and sending signals is more flexible. Optionally, first indication information is received on a first time domain resource and on a first partial bandwidth BWP, where the first indication information indicates switching to a second BWP and indicates a slot offset of a second time domain resource of a first data channel from the first time domain resource, and a frequency domain position and a bandwidth of the first BWP are the same as those of the second BWP; receiving or transmitting a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a slot indicated by the slot offset starts.

Optionally, the frequency domain position and bandwidth, the subcarrier spacing, and the cyclic prefix corresponding to the first BWP are the same as the frequency domain position and bandwidth, the subcarrier spacing, and the cyclic prefix corresponding to the second BWP.

Since the frequency-domain resource corresponding to the first BWP is the same as the frequency-domain resource corresponding to the second BWP, the terminal device may be described as receiving or transmitting the target signal on the frequency-domain resource corresponding to the first BWP, in addition to being described as receiving or transmitting the target signal on the frequency-domain resource corresponding to the second BWP. Similarly, even if the terminal device receives or transmits the target signal on the first BWP, the terminal device may be described as receiving or transmitting the target signal on the frequency domain resource corresponding to the second BWP, in addition to being described as receiving or transmitting the target signal on the frequency domain resource corresponding to the first BWP.

The frequency-domain position and bandwidth of the first BWP are the same as those of the second BWP, but the Identity (ID) of the first BWP is different from the ID of the second BWP. The first indication information may contain an index of the second BWP, and the terminal device may determine whether the index of the first BWP currently used is the same as the index of the second BWP. If the BWP switching is the same as the BWP switching, the terminal device may determine not to perform BWP switching; if not, the terminal device may determine to perform a handover from the first BWP to the second BWP.

The target signal may be received by, for example, a Physical Downlink Control Channel (PDCCH) and/or a Physical Downlink Shared Channel (PDSCH) and/or a channel state information reference signal (CSI-RS), and the target signal may be transmitted by one or more of a Physical Uplink Control Channel (PUCCH) and/or a Physical Uplink Shared Channel (PUSCH) and/or a Sounding Reference Signal (SRS).

With reference to the first aspect, in some implementations of the first aspect, the receiving or transmitting the target signal on the frequency domain resource corresponding to the first BWP or the second BWP on the time domain resource after the end of the first time domain resource and before the start of the time slot where the second time domain resource is located includes: and receiving or sending a target signal on the frequency domain resource corresponding to the first BWP or the second BWP after a target time and before the time slot of the second time domain resource begins, wherein the target time is after the end of the first time domain resource and before the time slot of the second time domain resource begins.

The target time may be, for example, the end time of the agreed BWP handover delay.

Optionally, the method further includes: and determining the target time according to the configuration parameters of the first BWP and the second BWP.

In one example, the terminal device or the network device may determine the target time based on how similar the configuration parameters of the first BWP are to the configuration parameters of the second BWP.

In one example, the terminal device or the network device may determine the target time instant according to the same type of configuration parameters in the first BWP and the second BWP.

Optionally, the method further includes: and determining the appointed BWP switching time delay according to the configuration parameters of the first BWP and the configuration parameters of the second BWP.

In one example, the terminal device or the network device may adjust the agreed BWP handoff latency according to how similar the configuration parameters of the first BWP are to the configuration parameters of the second BWP.

In one example, the terminal device or the network device may determine the agreed BWP handover latency according to the type of the same configuration parameters in the first BWP and the second BWP.

In the embodiment of the present application, the network device instructs the terminal device to perform BWP handover through the first indication information, and fully utilizes signaling resources while avoiding the occurrence of signaling loss, and the network device and the terminal device agree not to perform signaling reception before the target time and may perform signaling reception after the target time. Thus, sufficient time can be reserved for the terminal device for BWP handover without causing significant signaling resource waste.

With reference to the first aspect, in certain implementations of the first aspect, the number of receiving antennas corresponding to the first BWP is the same as the number of receiving antennas corresponding to the second BWP, and/or the number of multiple-input multiple-output (MIMO) transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP.

Optionally, the actual/agreed BWP handover delay is zero when the frequency domain position and bandwidth, the subcarrier spacing, and the cyclic prefix corresponding to the first BWP are the same as the frequency domain position and bandwidth, the subcarrier spacing, and the cyclic prefix corresponding to the second BWP.

That is to say, the first BWP and the second BWP are not associated with the number of receive antennas and/or the number of MIMO transmission layers, and when the frequency domain position and bandwidth, the subcarrier interval, and the cyclic prefix corresponding to the first BWP are the same as the frequency domain position and bandwidth, the subcarrier interval, and the cyclic prefix corresponding to the second BWP, the actual/agreed BWP switching delay is zero.

Optionally, the first BWP and the second BWP are both associated with the number of receive antennas and/or the number of MIMO transmission layer. Further optionally, the agreed BWP switching delay is zero when the number of receive antennas corresponding to the first BWP is the same as the number of receive antennas corresponding to the second BWP, and/or when the number of MIMO transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP.

In one example, in a case that the frequency domain position and the bandwidth corresponding to the first BWP are the same as the frequency domain position and the bandwidth corresponding to the second BWP, and the number of receive antennas corresponding to the first BWP is the same as the number of receive antennas corresponding to the second BWP, the agreed BWP switching delay is zero.

In one example, when the frequency domain position and the bandwidth corresponding to the first BWP are the same as the frequency domain position and the bandwidth corresponding to the second BWP, and the number of MIMO transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP, the agreed BWP handover delay is zero.

In one example, when the frequency domain position and the bandwidth corresponding to the first BWP are the same as the frequency domain position and the bandwidth corresponding to the second BWP, the number of receive antennas corresponding to the first BWP is the same as the number of receive antennas corresponding to the second BWP, and the number of MIMO transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP, the agreed BWP switching delay is zero.

If the frequency domain position and bandwidth corresponding to the first BWP are the same as the frequency domain position and bandwidth corresponding to the second BWP, and the number of receive antennas corresponding to the first BWP is different from the number of receive antennas corresponding to the second BWP, the agreed BWP switching delay is not zero but may take a smaller value.

Similarly, if the frequency domain position and bandwidth corresponding to the first BWP are the same as the frequency domain position and bandwidth corresponding to the second BWP, and the number of MIMO transmission layers corresponding to the first BWP is different from the number of MIMO transmission layers corresponding to the second BWP, the agreed BWP handover delay is not zero but may take a smaller value.

In this embodiment, since the first BWP is the same or almost the same as the second BWP, the terminal device may spend almost or no time to complete the BWP handover, in which case, the network device and the terminal device may determine that the agreed BWP handover delay is zero according to the configuration parameters corresponding to the first BWP and the configuration parameters corresponding to the second BWP. Therefore, the terminal device and the network device can make full use of the time-frequency resources before and after the BWP handover.

With reference to the first aspect, in certain implementations of the first aspect, before the receiving the first indication information on the first time domain resource and on the first portion of bandwidth BWP, the method further includes: receiving first radio resource control information, the first radio resource control information including a target BWP configuration parameter indicating a first configuration parameter of the first BWP and a second configuration parameter of the second BWP.

In the embodiment of the present application, the first BWP and the second BWP may share or share the target BWP configuration parameters, thereby saving the signaling overhead of the rrc message.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and determining the lower limit of the target time slot offset as the lower limit of the time slot offset corresponding to the second BWP.

In this application, the target timeslot offset lower limit may be understood as a target timeslot offset lower limit used by the terminal device subsequently, that is, the terminal device determines the target timeslot offset lower limit, so as to modify the currently used timeslot offset lower limit.

In the embodiment of the present application, when the rrc message is configured with a timeslot offset lower limit unrelated to BWP, the timeslot offset lower limit corresponding to the new BWP is agreed to be used after the rrc message is switched to the new BWP, which is beneficial to switch the timeslot offset lower limit value to a timeslot offset lower limit value corresponding to a power saving mode (also referred to as cross-timeslot scheduling) by using the new BWP instead of switching to a timeslot offset lower limit value corresponding to a power saving mode (also referred to as simultaneous timeslot scheduling) with data scheduling.

With reference to the first aspect, in certain implementations of the first aspect, before the receiving the first indication information on the first time domain resource and on the first portion of bandwidth BWP, the method further includes: receiving second radio resource control information, wherein the second radio resource control information comprises a plurality of time slot offset lower limits and a plurality of indexes which are in one-to-one correspondence with the time slot offset lower limits; in a case where the first indication information further includes information indicating a target index, the method further includes: and determining a target time slot offset lower limit as a time slot offset lower limit corresponding to the target index, wherein the target index is one of the plurality of indexes.

In the embodiment of the present application, in a case that the rrc message is configured with an index of a lower limit of timeslot offset that is unrelated to BWP, the lower limit of timeslot offset corresponding to the target index indicated by the first indication message is agreed to be used after the rrc message is switched to the new BWP, which is beneficial to switching the lower limit of timeslot offset to a lower limit of timeslot offset corresponding to a power saving mode (also referred to as cross timeslot scheduling) by using the new BWP instead of switching to the lower limit of timeslot offset corresponding to the power saving mode (also referred to as simultaneous timeslot scheduling) with data scheduling, and the manner of dynamically indicating the lower limit of timeslot offset has stronger flexibility.

In a second aspect, a communication method is provided, including: acquiring a first slot offset lower limit indicated by the third radio resource control information; receiving second indication information indicating scheduling information of a second data channel; determining a target timeslot offset lower limit as a timeslot offset lower limit corresponding to a third BWP if the second indication information further indicates switching to the third BWP; otherwise, determining the target timeslot offset lower limit as the first timeslot offset lower limit.

The slot offset lower limit may be one of a downlink slot offset lower limit and an uplink slot offset lower limit.

In the embodiment of the present application, in a case that the rrc message is configured with a BWP-independent slot offset lower limit, it is agreed to use the slot offset lower limit corresponding to the new BWP after switching to the new BWP, instead of the BWP-independent slot offset lower limit, and the terminal device may determine that the target slot offset lower limit is the slot offset lower limit corresponding to the new BWP, so that signaling transceiving failure due to indication message collision is avoided.

For example, the timeslot offset lower limit corresponding to the new BWP corresponds to the timeslot offset lower limit in the power saving mode, and when the second indication information further indicates to switch to the new BWP, it is beneficial to switch the timeslot offset lower limit value to the timeslot offset lower limit value corresponding to the power saving mode (also referred to as cross timeslot scheduling) using the new BWP instead of switching to the timeslot offset lower limit value corresponding to the power consuming mode (also referred to as simultaneous timeslot scheduling) with data scheduling.

With reference to the second aspect, in some implementations of the second aspect, the lower limit of the slot offset corresponding to the third BWP is a minimum slot offset in a time domain resource allocation list on the third BWP.

In the embodiment of the present application, the lower limit of the slot offset corresponding to the BWP may be derived from the time domain resource allocation list in the configuration parameters of the BWP without using a separate signaling indication, so as to reduce the signaling overhead.

With reference to the second aspect, in some implementations of the second aspect, the obtaining the first slot offset lower limit indicated by the third rrc message includes: and acquiring the first time slot offset lower limit and a second time slot offset lower limit indicated by the third radio resource control information, wherein the first time slot offset lower limit is smaller than the second time slot offset lower limit.

In this embodiment, the first timeslot offset lower limit corresponds to a timeslot offset lower limit with higher power consumption and shorter delay, and the second timeslot offset lower limit corresponds to a timeslot offset lower limit with higher power consumption and longer delay. And after the terminal equipment detects the indication information, the target time slot offset lower limit is switched to the time slot offset lower limit corresponding to shorter time delay, so that the signal receiving time delay is favorably improved, and the data receiving and transmitting speed is improved.

Optionally, the method further includes: and starting a timer, wherein when the timer stops counting, the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the third BWP.

In a third aspect, a communication method is provided, including: receiving fourth radio resource control information, wherein the fourth radio resource control information comprises a plurality of time slot offset lower limits and a plurality of indexes which are in one-to-one correspondence with the time slot offset lower limits; receiving third indication information including information indicating a switch to a fourth BWP; determining a target slot offset lower limit as a slot offset lower limit corresponding to a target index under the condition that the third indication information further includes information indicating the target index, wherein the target index is one of the plurality of indexes; otherwise, determining the target timeslot offset lower limit as a timeslot offset lower limit corresponding to the fourth BWP.

In the embodiment of the present application, in the case that the rrc message is configured with an index of a lower slot offset limit that is not related to BWP, the lower slot offset limit corresponding to the target index indicated by the third indication message is agreed instead of the lower slot offset limit corresponding to BWP after switching to new BWP, so that the terminal device will not fail to receive and transmit signaling due to indication message collision.

For example, the lower limit of the slot offset corresponding to the target index corresponds to the lower limit of the slot offset in the short delay mode, and when the third indication information further indicates the target index, the new BWP is favorable for switching the lower limit of the slot offset to the lower limit of the slot offset corresponding to the short delay mode instead of the lower limit of the slot offset corresponding to the long delay mode, which is favorable for improving the signaling transceiving efficiency. And, the mode of dynamically indicating the time slot offset lower limit has stronger flexibility.

Optionally, the method further includes: and starting a timer, wherein when the timer stops counting, the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the fourth BWP.

In a fourth aspect, a communication method is provided, including: transmitting first indication information on a first time domain resource and on a first partial bandwidth BWP, the first indication information indicating a switch to a second BWP and indicating a reception or transmission of a first data channel on a second time domain resource, a frequency domain position and a bandwidth of the first BWP being the same as a frequency domain position and a bandwidth of the second BWP; and receiving or transmitting a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts.

With reference to the fourth aspect, in some implementations of the fourth aspect, the receiving or transmitting the target signal on the frequency domain resource corresponding to the first BWP or the second BWP on the time domain resource after the end of the first time domain resource and before the start of the time slot where the second time domain resource is located includes: and receiving or sending a target signal on the frequency domain resource corresponding to the first BWP or the second BWP after a target time and before the time slot of the second time domain resource begins, wherein the target time is after the end of the first time domain resource and before the time slot of the second time domain resource begins.

With reference to the fourth aspect, in some implementations of the fourth aspect, the number of receiving antennas corresponding to the first BWP is the same as the number of receiving antennas corresponding to the second BWP, and/or the number of MIMO transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP.

With reference to the fourth aspect, in some implementations of the fourth aspect, before the receiving the first indication information on the first time-domain resource and on the first portion of bandwidth BWP, the method further includes: sending first radio resource control information, where the first radio resource control information includes a target BWP configuration parameter, and the target BWP configuration parameter is used to indicate a first configuration parameter of the first BWP and a second configuration parameter of the second BWP.

With reference to the fourth aspect, in certain implementations of the fourth aspect, the method further includes: and determining the lower limit of the target time slot offset as the lower limit of the time slot offset corresponding to the second BWP.

With reference to the fourth aspect, in some implementations of the fourth aspect, before the receiving the first indication information on the first time-domain resource and on the first portion of bandwidth BWP, the method further includes: sending second radio resource control information, wherein the second radio resource control information comprises a plurality of time slot offset lower limits and a plurality of indexes which are in one-to-one correspondence with the time slot offset lower limits; in a case where the first indication information further includes information indicating a target index, the method further includes: and determining a target time slot offset lower limit as a time slot offset lower limit corresponding to the target index, wherein the target index is one of the plurality of indexes.

In a fifth aspect, a communication method is provided, including: transmitting third radio resource control information indicating a lower limit of the first slot offset; transmitting second indication information indicating scheduling information of a second data channel; determining a target timeslot offset lower limit as a timeslot offset lower limit corresponding to a third BWP if the second indication information further indicates switching to the third BWP; otherwise, determining the target timeslot offset lower limit as the first timeslot offset lower limit.

With reference to the fifth aspect, in some implementations of the fifth aspect, the lower limit of the slot offset corresponding to the third BWP is a minimum slot offset in the time domain resource allocation list on the third BWP.

With reference to the fifth aspect, in some implementations of the fifth aspect, the third radio resource control information is further used to indicate a second lower slot offset limit, and the first lower slot offset limit is smaller than the second lower slot offset limit.

In a sixth aspect, a communication method is provided, including: transmitting fourth radio resource control information, wherein the fourth radio resource control information comprises a plurality of time slot offset lower limits and a plurality of indexes which are in one-to-one correspondence with the time slot offset lower limits; transmitting third indication information including information indicating a handover to a fourth BWP; determining a target slot offset lower limit as a slot offset lower limit corresponding to a target index under the condition that the third indication information further includes information indicating the target index, wherein the target index is one of the plurality of indexes; otherwise, determining the target timeslot offset lower limit as a timeslot offset lower limit corresponding to the fourth BWP.

In a seventh aspect, a terminal device is provided, including: a transceiving module, configured to receive first indication information on a first time domain resource and on a first fractional bandwidth BWP, where the first indication information indicates switching to a second BWP and indicates receiving or transmitting a first data channel on a second time domain resource, and a frequency domain position and a bandwidth of the first BWP are the same as a frequency domain position and a bandwidth of the second BWP; the transceiver module is further configured to receive or transmit a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts.

With reference to the seventh aspect, in some implementations of the seventh aspect, the transceiver module is specifically configured to receive or transmit the target signal on the frequency domain resource corresponding to the first BWP or the second BWP after the target time and before the start of the time slot of the second time domain resource, where the target time is located after the end of the first time domain resource and before the start of the time slot of the second time domain resource.

With reference to the seventh aspect, in some implementations of the seventh aspect, the number of receiving antennas corresponding to the first BWP is the same as the number of receiving antennas corresponding to the second BWP, and/or the number of MIMO transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP.

With reference to the seventh aspect, in certain implementations of the seventh aspect, before the transceiver module receives the first indication information on the first time-domain resource and the first partial bandwidth BWP, the transceiver module is further configured to receive first radio resource control information, where the first radio resource control information includes a target BWP configuration parameter, and the target BWP configuration parameter is used to indicate a first configuration parameter of the first BWP and a second configuration parameter of the second BWP.

With reference to the seventh aspect, in some implementations of the seventh aspect, the terminal device further includes: and a processing module, configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the second BWP.

With reference to the seventh aspect, in some implementations of the seventh aspect, before the transceiver module receives the first indication information on the first time domain resource and the first fractional bandwidth BWP, the transceiver module is further configured to receive second radio resource control information, where the second radio resource control information includes a plurality of lower slot offset limits and a plurality of indexes corresponding to the lower slot offset limits in a one-to-one manner; the terminal device further includes: a processing module, configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to a target index when the first indication information further includes information indicating the target index, where the target index is one of the multiple indexes.

In an eighth aspect, a terminal device is provided, which includes: an obtaining module, configured to obtain a first slot offset lower limit indicated by the third rrc message; a receiving module, configured to receive second indication information, where the second indication information indicates scheduling information of a second data channel; a processing module, configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to a third BWP if the second indication information further indicates switching to the third BWP; otherwise, the processing module is configured to determine that the target timeslot offset lower limit is the first timeslot offset lower limit.

With reference to the eighth aspect, in some implementations of the eighth aspect, the lower limit of the slot offset corresponding to the third BWP is a minimum slot offset in the time domain resource allocation list on the third BWP.

With reference to the eighth aspect, in some implementation manners of the eighth aspect, the obtaining module is specifically configured to obtain the first lower slot offset limit and a second lower slot offset limit indicated by the third rrc message, where the first lower slot offset limit is smaller than the second lower slot offset limit.

In a ninth aspect, there is provided a terminal device, comprising: a receiving module, configured to receive fourth radio resource control information, where the fourth radio resource control information includes a plurality of slot offset lower limits and a plurality of indexes that are in one-to-one correspondence with the plurality of slot offset lower limits; the receiving module is further configured to receive third indication information, where the third indication information includes information indicating to switch to a fourth BWP, and the processing module is configured to determine, when the third indication information further includes information indicating a target index, that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to the target index, where the target index is one of the multiple indexes; otherwise, the processing module is configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the fourth BWP.

In a tenth aspect, there is provided a network device comprising: a transceiving module, configured to transmit first indication information on a first time domain resource and on a first partial bandwidth BWP, where the first indication information indicates switching to a second BWP and indicates receiving or transmitting a first data channel on a second time domain resource, and a frequency domain position and a bandwidth of the first BWP are the same as a frequency domain position and a bandwidth of the second BWP; the transceiver module is further configured to receive or transmit a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts.

With reference to the tenth aspect, in some implementations of the tenth aspect, the transceiver module is specifically configured to receive or transmit the target signal on the frequency domain resource corresponding to the first BWP or the second BWP after a target time and before a time slot where the second time domain resource is located starts, where the target time is located after the end of the first time domain resource and before the time slot where the second time domain resource is located starts.

With reference to the tenth aspect, in some implementations of the tenth aspect, the number of receiving antennas corresponding to the first BWP is the same as the number of receiving antennas corresponding to the second BWP, and/or the number of MIMO transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP.

With reference to the tenth aspect, in certain implementations of the tenth aspect, before the transceiver module receives the first indication information on the first time-domain resource and the first bandwidth portion BWP, the transceiver module is further configured to transmit first radio resource control information, where the first radio resource control information includes a target BWP configuration parameter indicating a first configuration parameter of the first BWP and a second configuration parameter of the second BWP.

With reference to the tenth aspect, in some implementations of the tenth aspect, the network device further includes: and a processing module, configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the second BWP.

With reference to the tenth aspect, in some implementations of the tenth aspect, before the transceiver module receives the first indication information on the first time domain resource and the first fractional bandwidth BWP, the transceiver module is further configured to transmit second radio resource control information, where the second radio resource control information includes a plurality of lower slot offset limits and a plurality of indexes corresponding to the lower slot offset limits in a one-to-one manner; in a case where the first indication information further includes information indicating a target index, the network device further includes: and the processing module is used for determining that the target time slot offset lower limit is the time slot offset lower limit corresponding to the target index, and the target index is one of the plurality of indexes.

In an eleventh aspect, a network device is provided, which includes: a sending module, configured to send third radio resource control information indicating a lower limit of the first slot offset; the sending module is further configured to send second indication information, where the second indication information indicates scheduling information of a second data channel, and the network device further includes a processing module, where the processing module is configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to a third BWP when the second indication information further indicates switching to the third BWP; otherwise, the processing module is configured to determine that the target timeslot offset lower limit is the first timeslot offset lower limit.

With reference to the eleventh aspect, in certain implementations of the eleventh aspect, the lower limit of the slot offset corresponding to the third BWP is a minimum slot offset in the time domain resource allocation list on the third BWP.

With reference to the eleventh aspect, in some implementations of the eleventh aspect, the third radio resource control information is further used to indicate a second lower slot offset limit, and the first lower slot offset limit is smaller than the second lower slot offset limit.

In a twelfth aspect, a network device is provided, which includes: a sending module, configured to send fourth radio resource control information, where the fourth radio resource control information includes multiple slot offset lower limits and multiple indexes that are in one-to-one correspondence with the multiple slot offset lower limits; the sending module is further configured to send third indication information, where the third indication information includes information indicating to switch to a fourth BWP, and if the third indication information further includes information indicating a target index, the processing module is configured to determine that a target slot offset lower limit is a slot offset lower limit corresponding to the target index, where the target index is one of the multiple indexes; otherwise, the processing module is configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the fourth BWP.

In a thirteenth aspect, a terminal device is provided, which includes means for performing any one of the possible implementation manners of the first aspect to the third aspect.

In a fourteenth aspect, a network device is provided that includes means for performing any one of the possible implementations of the fourth to sixth aspects.

In a fifteenth aspect, a computer program storage medium is provided, the computer program storage medium storing program code which, when run on a computer, causes the computer to execute the instructions of any one of the possible implementations of the first to sixth aspects.

In a sixteenth aspect, a computer program product containing instructions is provided, which, when run on a computer, causes the computer to perform the method according to any one of the possible implementations of the first to sixth aspects.

A seventeenth aspect provides a communication device configured to perform the method of any one of the possible implementations of the first to sixth aspects.

In an eighteenth aspect, there is provided a communication apparatus, the apparatus comprising: a processor coupled to the memory, and the memory configured to store a computer program, and the processor configured to execute the computer program stored in the memory to cause the communication apparatus to perform the method according to any of the possible implementation manners of the first aspect to the sixth aspect.

In a nineteenth aspect, there is provided a communication apparatus, the apparatus comprising: a processor, a memory and a transceiver, the memory being configured to store a computer program, and the processor being configured to execute the computer program stored in the memory to cause the apparatus to perform the method of any of the possible implementations of the first to sixth aspects.

In a twentieth aspect, there is provided a communication apparatus comprising: at least one processor and a communication interface for information interaction of the communication device with other communication devices, the program instructions, when executed in the at least one processor, causing the communication device to carry out the method of any one of the possible implementations of the first to sixth aspects.

In a twenty-first aspect, there is provided a processor, comprising: at least one circuit configured to perform the method according to any one of the possible implementations of the first aspect to the sixth aspect.

In a twenty-second aspect, a chip system is provided, where the chip system includes at least one processor, and when a program instruction is executed in the at least one processor, the chip system is enabled to implement the method according to any one of the possible implementation manners of the first aspect to the sixth aspect.

In a twenty-third aspect, the present application provides a communication system comprising the terminal device and the network device above.

Drawings

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

Fig. 2 is a schematic diagram of a method of transmitting and receiving signals before and after a partial Bandwidth (BWP) switch.

Fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present application.

Fig. 4 is a schematic diagram of transmitting and receiving signals before and after BWP handover according to an embodiment of the present application.

Fig. 5 is a schematic diagram of transmitting and receiving signals before and after BWP handover according to an embodiment of the present application.

Fig. 6 is a schematic diagram of transmitting and receiving signals before and after BWP handover according to an embodiment of the present application.

Fig. 7 is a schematic diagram of transmitting and receiving signals before and after BWP handover according to an embodiment of the present application.

Fig. 8 is a schematic flow chart of a communication method according to an embodiment of the present application.

Fig. 9 is a schematic diagram of transmitting and receiving signals before and after BWP handover according to an embodiment of the present application.

Fig. 10 is a schematic flow chart diagram of a communication method according to an embodiment of the present application.

Fig. 11 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application.

Fig. 12 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application.

Fig. 13 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application.

Fig. 14 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application.

Fig. 15 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application.

Fig. 16 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application.

Fig. 17 is a schematic configuration diagram of a communication apparatus according to an embodiment of the present application.

Fig. 18 is a schematic configuration diagram of a communication apparatus 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.

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) system, a new radio NR (NR) system, or other communication systems.

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 future 5G network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

The network device in the embodiment of the present application may be a device for communicating with a terminal, 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 (NB, NodeB) in an LTE system, may also be a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or 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 future evolved PLMN network, one or a set of antenna panels (including multiple antennas) of a base station in a 5G system, alternatively, the network node may also be a network node that forms a gNB or a transmission point, such as a baseband unit (BBU), a Distributed Unit (DU), or the like, and the embodiment of the present application is not limited.

In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may also include an Active Antenna Unit (AAU). The CU implements part of the function of the gNB and the DU implements part of the function of the gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implementing functions of a Radio Resource Control (RRC) layer and a Packet Data Convergence Protocol (PDCP) layer. The DU is responsible for processing a physical layer protocol and a real-time service, and implements functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or by the DU + AAU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may be divided into network devices in an access network (RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this 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 communication system of the present application. The communication system in fig. 1 may include at least one terminal (e.g., terminal 10, terminal 20, terminal 30, terminal 40, terminal 50, and terminal 60) and a network device 70. The network device 70 is configured to provide a communication service to a terminal and access a core network, and the terminal may access the network by searching for a synchronization signal, a broadcast signal, and the like transmitted by the network device 70, thereby performing communication with the network. The terminals 10, 20, 30, 40 and 60 in fig. 1 may perform uplink and downlink transmissions with the network device 70. For example, the network device 70 may transmit a downlink signal to the terminal 10, the terminal 20, the terminal 30, the terminal 40, and the terminal 60, or may receive an uplink signal transmitted by the terminal 10, the terminal 20, the terminal 30, the terminal 40, and the terminal 60.

The terminal 40, the terminal 50, and the terminal 60 may be regarded as one communication system, and the terminal 60 may transmit a downlink signal to the terminal 40 and the terminal 50 or may receive an uplink signal transmitted by the terminal 40 and the terminal 50.

It should be noted that the embodiments of the present application may be applied to a communication system including one or more network devices, and may also be applied to a communication system including one or more terminals, which is not limited in the present application.

It should be understood that the network devices included in the communication system may be one or more. A network device may send data or control signaling to one or more terminals. Multiple network devices may also transmit data or control signaling to one or more terminals simultaneously.

Fig. 2 is a schematic diagram illustrating transmission and reception of signals before and after switching of a bandwidth part (BWP).

201, a network device sends Downlink Control Information (DCI) to a terminal device on a first BWP on a first time domain resource, where the DCI indicates to switch to a second BWP and indicates to receive a physical downlink shared channel or send a physical uplink shared channel on a second time domain resource.

Accordingly, the terminal device receives the downlink control information on the first time domain resource.

The downlink control information may be transmitted on a physical downlink control channel.

The first time domain resource may be a resource in units of a slot, a subframe, a radio frame, a mini-slot (mini-slot), or an Orthogonal Frequency Division Multiplexing (OFDM) symbol.

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. When the RRC signaling configures the downlink BWP, the RRC signaling may include configuration parameters of the downlink BWP. The configuration parameters of the downlink BWP include: frequency domain position and bandwidth (location and bandwidth), subcarrier space (SCS), Cyclic Prefix (CP), Time Domain Resource Allocation (TDRA) list of a Physical Downlink Shared Channel (PDSCH), PDSCH scrambling Identity (ID), demodulation reference signal (DMRS) type configuration of the PDSCH, Transmission Configuration Indication (TCI) state list of the PDSCH, rate matching pattern list of the PDSCH, zero power channel state information reference signal (ZP CSI-RS) resource list, period/aperiodic/semi-persistent ZP resource list, semi-persistent scheduling configuration of the PDSCH. When the uplink BWP is configured by the RRC signaling, the RRC signaling may include configuration parameters of the uplink BWP. The configuration parameters of the upstream BWP include, for example: frequency domain position and bandwidth, SCS, CP, or a TDRA list of a Physical Uplink Shared Channel (PUSCH), PUSCH scrambling ID, DMRS type configuration of the PUSCH, power control configuration of the PUSCH, configuration of Uplink Control Information (UCI) on the PUSCH (including a code rate scaling factor, etc.), PUCCH resource set list, PUCCH resource list, power control configuration of the PUCCH, configuration grant of the PUSCH (configured grant), Sounding Reference Signal (SRS) configuration. The network device may indicate the frequency band used by the terminal device for transceiving signaling by indicating one of the BWPs.

The downlink control information may contain an index of the second BWP, thereby instructing the terminal device to switch the first BWP to the second BWP. The terminal device may determine whether the index of the first BWP currently in use is the same as the index of the second BWP. If the BWP switching is the same as the BWP switching, the terminal device may determine not to perform BWP switching; if not, the terminal device may determine to perform a handover from the first BWP to the second BWP.

The first indication information indicates to switch to the second BWP, and the network device indicates the terminal device to send and receive information using the second BWP. The downlink control information may include a time slot offset between a starting position of a time slot in which the second time domain resource is located and a starting position of a time slot in which the first time domain resource is located. When the downlink control information indicates that the physical downlink shared channel is received on the second time domain resource, the timeslot offset of the physical downlink shared channel may be denoted as K₀. When the downlink control information indicates that the physical uplink shared channel is transmitted on the second time domain resource, the timeslot offset of the physical uplink shared channel may be denoted as K₂. FIG. 2 shows a time slot offset K of a physical downlink shared channel₀Examples of (2). As shown in fig. 2, the terminal device calculates K backwards according to the starting position of the time slot n where the first time domain resource is located₀Obtaining the time slot n + K of the second time domain resource₀The starting position of (a).

202, performing a handover from said first BWP to said second BWP.

The terminal device may perform the handover from the first BWP to the second BWP immediately after receiving the first indication information, or may perform the handover from the first BWP to the second BWP within a period of time after receiving the first indication information.

Performing a handover from the first BWP to the second BWP means that the terminal device will no longer use the first BWP for transceiving signaling but use the second BWP for transceiving signaling. Before the terminal device can transceive signaling on the second BWP, the terminal device needs to perform a series of preparation tasks such as changing the antenna and changing the BWP configuration parameters, so that the BWP may not perform signaling reception and transmission during the BWP handover. As shown in fig. 2, the terminal device may not perform the receiving and transmitting of the signaling after the first time domain resource is ended and before the second time domain resource is started. Since the terminal device needs to receive or transmit the first data channel on the second time-domain resource, on the second BWP, the terminal device needs to complete the handover from said first BWP to said second BWP before the second time-domain resource starts.

Due to the differences in device processing capabilities and BWP configuration parameters, the actual latency required by the end device to perform BWP handover is different. In order to coordinate signaling between the network device and the terminal device, the network device and the terminal device may agree on a BWP handover delay. For example, when the SCS is 0, the agreed BWP switching delay under the capability of the first type terminal device is 3 slots, and the agreed BWP switching delay under the capability of the second type terminal device is 1 slot; when the SCS is 1, the agreed BWP switching delay under the capability of the first type terminal device is 5 slots, and the agreed BWP switching delay under the capability of the second type terminal device is 2 slots; when the SCS is 2, the agreed BWP switching delay under the capability of the first type terminal device is 9 slots, and the agreed BWP switching delay under the capability of the second type terminal device is 3 slots; when the SCS is 3, the agreed BWP handover delay under the capability of the first type terminal device is 17 slots, and the agreed BWP handover delay under the capability of the second type terminal device is 6 slots. The network device may schedule the first data channel according to an agreed BWP handoff delay so that the terminal device may receive or transmit the first data channel on the second BWP.

For convenience of description, the "actual BWP handover latency" may represent the latency actually consumed by the terminal device when performing BWP handover; the "agreed BWP handover delay" may represent the BWP handover delay agreed by the network device and the terminal device. Typically, the agreed BWP handoff latency is longer than the actual BWP handoff latency. The "committed BWP handoff latency" may also be referred to as interrupt time. In the present application, the "agreed BWP handover latency" may be the BWP handover latency specified in the communication protocol. The interval between the physical downlink control channel and the physical downlink shared channel in fig. 2 can be represented by an agreed BWP switching delay.

The starting position of the agreed BWP handover delay may be the starting position of the time slot where the PDCCH transmitting the DCI is located. The starting position of the agreed BWP handover delay may also be the end position of the third symbol of the slot in which the PDCCH for transmitting DCI is located. The starting position of the agreed BWP handover delay may also be the end position of the last symbol of the PDCCH transmitting the DCI. The starting position of the agreed BWP handover delay may also be the ending position of the time slot where the PDCCH transmitting the DCI is located.

203, receiving or transmitting the first data channel on the second BWP on the second time domain resource.

The terminal device receives or transmits the first data channel on the second BWP after completing the handover from the first BWP to the second BWP. Receiving or transmitting said first data channel may be understood as receiving or transmitting messages or signaling on said first data channel.

As described above, in order to ensure that the terminal device sends and receives messages without errors, the network device and the terminal device may agree on a longer BWP handover delay, which is longer than the BWP handover delay actually required by the terminal device. In order to improve the flexibility of signal transceiving and improve the utilization rate of channel resources in the BWP handover process, the present application provides a communication method to provide a new BWP handover scheme.

Fig. 3 is a schematic flow chart of a communication method provided in the present application.

301, a network device sends first indication information on a first time domain resource and on a first partial bandwidth BWP, the first indication information indicating switching to a second BWP and indicating receiving or sending a first data channel on a second time domain resource, and a frequency domain position and a bandwidth of the first BWP are the same as those of the second BWP.

Accordingly, the terminal device receives the first indication information on the first fractional bandwidth BWP on the first time domain resource.

That is, when the terminal device needs to receive or transmit data on a new BWP, the network device may transmit indication information indicating the new BWP to the terminal device to instruct the terminal device to perform BWP handover. The network device may indicate, to the terminal device, the time domain resource where the first data channel is located through the first indication information, so that the terminal device completes BWP handover before receiving or transmitting the first data channel. The frequency domain position and bandwidth are one configuration parameter of BWP, and the frequency domain position and bandwidth of BWP can be equivalent to the frequency domain resource of BWP, or equivalent to the frequency band of BWP. The frequency-domain position and bandwidth of the first BWP may be identical to those of the second BWP, and may be equivalent to the frequency-domain resources of the first BWP being identical to those of the second BWP. Alternatively, the frequency domain position and bandwidth of the first BWP may be the same as the frequency domain position and bandwidth of the second BWP, and may be equivalent to the frequency band of the first BWP being the same as the frequency band of the second BWP.

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. When the RRC signaling configures the downlink BWP, the RRC signaling may include configuration parameters of the downlink BWP. The configuration parameters of the downlink BWP include: frequency domain position and bandwidth (location and bandwidth), SCS, CP, TDRA list of PDSCH, PDSCH scrambling ID, DMRS type configuration of PDSCH, TCI state list of PDSCH, rate matching pattern list of PDSCH, ZP CSI-RS resource list, periodic/aperiodic/semi-persistent ZP CSI-RS resource set list, semi-persistent scheduling configuration of PDSCH. When the uplink BWP is configured by the RRC signaling, the RRC signaling may include configuration parameters of the uplink BWP. The configuration parameters of the upstream BWP include, for example: frequency domain position and bandwidth, SCS, CP, TDRA list of PUSCH, PUSCH scrambling ID, DMRS type configuration of PUSCH, power control configuration of PUSCH, configuration of UCI carried on PUSCH (including code rate scaling factor, etc.), PUCCH resource set list, PUCCH resource list, power control configuration of PUCCH, configuration permission (configured grant) of PUSCH, SRS configuration. The network device may indicate the frequency band used by the terminal device for transceiving signaling by indicating one of the BWPs. In some cases, the frequency-domain position and bandwidth of the first BWP are the same as those of the second BWP, which means that the frequency-domain position and bandwidth, subcarrier spacing, and cyclic prefix corresponding to the first BWP are the same as those corresponding to the second BWP, subcarrier spacing, and cyclic prefix.

The frequency-domain position and bandwidth of the first BWP is the same as the frequency-domain position and bandwidth of the second BWP, but the first BWP is different from the second BWP. That is, the ID of the first BWP is different from the ID of the second BWP, but the frequency band of the first BWP is the same as the frequency band of the second BWP. For example, the frequency band of the first BWP and the frequency band of the second BWP are 3540-3560MHz, but the ID of the first BWP is 1 and the ID of the first BWP is 2, and the terminal device can determine that the first BWP and the second BWP are different BWPs according to the IDs of the BWPs. In the present application, even if configuration parameters of a first BWP are substantially the same as configuration parameters of a second BWP, if an Identity (ID) of the first BWP is different from an ID of the second BWP, the first BWP and the second BWP are different BWPs.

In all configurations of BWP, the frequency domain position and bandwidth have the greatest impact on the actual switching delay of BWP. That is, if the frequency domain positions and bandwidths of two BWPs before and after handover are the same, the actual BWP handover delay is shorter; if the frequency domain positions and bandwidths of two BWPs before and after the handover are different, the actual BWP handover delay is longer. Therefore, when the terminal device determines that the frequency domain position and the bandwidth of the first BWP are the same as the frequency domain position and the bandwidth of the second BWP, the terminal device may know that the difference between the actual BWP handoff delay and the agreed BWP handoff delay is large.

In one example, other BWP parameters of the first BWP may be completely different from other configuration parameters of the second BWP, in addition to frequency domain position and bandwidth.

For example, the first BWP and the second BWP are downlink BWPs, and the configuration parameters of the first BWP include SCS1, CP1, TDRA list 1, scrambling ID1, DMRS type configuration 1, TCI state list 1, rate matching pattern list 1, ZP CSI-RS resource list 1, periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 1, and semi-persistent scheduling configuration 1; the configuration parameters of the second BWP include SCS2, CP2, TDRA list 2, scrambling ID2, DMRS type configuration 2, TCI state list 2, rate matching pattern list 2, ZP CSI-RS resource list 2, periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 2, semi-persistent scheduling configuration 2. The configuration parameters of the first BWP and the configuration parameters of the second BWP satisfy: SCS1 is different from SCS 2; and CP1 is different from CP 2; and DRA list 1 is different from TDRA list 2; and scrambling ID1 is different from scrambling ID 2; and DMRS type configuration 1 is different from DMRS type configuration 2; and the TCI state list 1 is different from the TCI state list 2; and the rate matching pattern list 1 is different from the rate matching pattern list 2; the ZP CSI-RS resource list 1 is different from the ZP CSI-RS resource list 2; the periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 1 is different from the periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 2; and semi-persistent scheduling configuration 1 is different from semi-persistent scheduling configuration 2.

For another example, the first BWP and the second BWP are uplink BWPs, and the configuration parameters of the first BWP include SCS3, CP3, TDRA list 3, scrambling ID3, DMRS type configuration 3, PUSCH power control configuration 3, UCI configuration 3, PUCCH resource set list 3, PUCCH resource list 3, PUCCH power control configuration 3, PUSCH configuration permission, and SRS configuration 3; the configuration parameters of the second BWP include SCS4, CP4, TDRA list 4, scrambling ID4, DMRS type configuration 4, PUSCH power control configuration 4, UCI configuration 4, PUCCH resource set list 4, PUCCH resource list 4, PUCCH power control configuration 4, PUSCH configuration grant, SRS configuration 4. The configuration parameters of the first BWP and the configuration parameters of the second BWP satisfy: SCS3 is different from SCS 4; and CP3 is different from CP 4; and DRA list 3 is different from TDRA list 4; and scrambling ID3 is different from scrambling ID 4; and DMRS type configuration 3 is different from DMRS type configuration 4; and the TCI state list 3 is different from the TCI state list 4; and rate matching pattern list 3 is different from rate matching pattern list 4; the ZP CSI-RS resource list 3 is different from the ZP CSI-RS resource list 4; the periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 3 is different from the periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 4; and semi-persistent scheduling configuration 3 is different from semi-persistent scheduling configuration 4.

In another example, other BWP parameters of the first BWP may be the same or partially the same as other configuration parameters of the second BWP, except for frequency domain position and bandwidth.

For example, the first BWP and the second BWP are downlink BWPs, and the configuration parameters of the first BWP include SCS1, CP1, TDRA list 1, scrambling ID1, DMRS type configuration 1, TCI state list 1, rate matching pattern list 1, ZP CSI-RS resource list 1, periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 1, and semi-persistent scheduling configuration 1; the configuration parameters of the second BWP include SCS2, CP2, TDRA list 2, scrambling ID2, DMRS type configuration 2, TCI state list 2, rate matching pattern list 2, ZP CSI-RS resource list 2, periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 2, semi-persistent scheduling configuration 2. The configuration parameters of the first BWP and the configuration parameters of the second BWP satisfy at least one of the following: SCS1 is identical to SCS 2; CP1 is identical to CP 2; TDRA list 1 is the same as TDRA list 2; scrambling ID1 is the same as scrambling ID 2; DMRS type configuration 1 is the same as DMRS type configuration 2; TCI state list 1 is the same as TCI state list 2; rate matching pattern list 1 is the same as rate matching pattern list 2; the ZP CSI-RS resource list 1 is the same as the ZP CSI-RS resource list 2; the periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 1 is the same as the periodic/aperiodic/semi-persistent ZP CSI-RS resource set list 2; semi-persistent scheduling configuration 1 is the same as semi-persistent scheduling configuration 2.

For another example, the first BWP and the second BWP are uplink BWPs, and the configuration parameters of the first BWP include SCS3, CP3, TDRA list 3, scrambling ID3, DMRS type configuration 3, PUSCH power control configuration 3, UCI configuration 3, PUCCH resource set list 3, PUCCH resource list 3, PUCCH power control configuration 3, PUSCH configuration permission, and SRS configuration 3; the configuration parameters of the second BWP include SCS4, CP4, TDRA list 4, scrambling ID4, DMRS type configuration 4, PUSCH power control configuration 4, UCI configuration 4, PUCCH resource set list 4, PUCCH resource list 4, PUCCH power control configuration 4, PUSCH configuration grant, SRS configuration 4. The configuration parameters of the first BWP and the configuration parameters of the second BWP satisfy at least one of the following: SCS3 is identical to SCS 4; CP3 is identical to CP 4; DRA list 3 is the same as TDRA list 4; scrambling ID3 is the same as scrambling ID 4; DMRS type configuration 3 is the same as DMRS type configuration 4; the PUSCH power control configuration 3 is the same as the PUSCH power control configuration 4; the UCI configuration 3 is the same as the UCI configuration 4; the PUCCH resource set list 3 is the same as the PUCCH resource set list 4; PUCCH resource list 3 is the same as PUCCH resource list 4; the PUCCH power control configuration 3 is the same as the PUCCH power control configuration 4; the PUSCH configuration grant 3 is the same as the PUSCH configuration grant 4; SRS configuration 3 is the same as SRS configuration 4.

In one example, the terminal device or the network device may adjust the agreed BWP handoff latency according to how similar the configuration parameters of the first BWP are to the configuration parameters of the second BWP. That is, both the network device and the terminal device may shorten or lengthen the BWP handoff delay according to the similarity between the configuration parameters of the first BWP and the configuration parameters of the second BWP, so that the network device may efficiently schedule resources for the terminal device. The similarity between the configuration parameters of the first BWP and the configuration parameters of the second BWP can be characterized by the number of the same BWP configuration parameters. The greater the number of the same BWP configuration parameters, the higher the degree of similarity of the configuration parameters of the first BWP with the configuration parameters of the second BWP.

For example, when N configuration parameters of the M configuration parameters of the first BWP are the same as N configuration parameters of the M configuration parameters of the second BWP, it may be determined that the agreed BWP handover latency is agreed BWP handover latency x (M-N)/M.

For example, in a case where the frequency-domain position and the bandwidth of the first BWP are the same as those of the second BWP, and the subcarrier interval of the first BWP is the same as that of the second BWP, and the cyclic prefix of the first BWP is the same as that of the second BWP, the terminal device may receive the plurality of indication information on the first BWP and receive the data channel scheduled by the plurality of indication information on the second BWP. For example, the terminal device receives the target indication information before receiving the first indication information, the target indication information includes scheduling information indicating a target data channel (e.g., a slot offset between a start position of a slot where the first indication information is located and a start position of a slot where the target data channel is located), and a time domain position where the target data channel is located after the first time domain resource, and the terminal device may receive the target data channel on the second BWP. The time domain position of the target data channel may be located before the second time domain position or may be located after the second time domain position. It can be seen that the frequency domain position and bandwidth, the subcarrier spacing, and the frequency domain position and bandwidth of the cyclic prefix corresponding to the first BWP and the second BWP are the same, which means that the similarity between the first BWP and the second BWP is very high.

That is, in the case that the frequency domain position and bandwidth, the subcarrier spacing, and the cyclic prefix corresponding to the first BWP are the same as the frequency domain position and bandwidth, the subcarrier spacing, and the cyclic prefix corresponding to the second BWP, the terminal device can send and receive signaling on the new second BWP with little preparation work. At this time, the actual handover delay of the terminal device may be zero. The network device and the terminal device may determine that the agreed BWP handover delay is zero, that is, the network device may schedule resources for the terminal device in time.

Optionally, the first BWP and the second BWP are both associated with the number of receive antennas and/or the number of MIMO transmission layer.

Optionally, when the number of receiving antennas corresponding to the first BWP is the same as the number of receiving antennas corresponding to the second BWP, and/or when the number of MIMO transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP, the actual/agreed BWP switching delay is zero.

That is, the number of receiving antennas corresponding to BWP and the number of MIMO transmission layers corresponding to BWP have the least effect on BWP handoff delay. In other words, the number of receiving antennas corresponding to the first BWP is the same as the number of receiving antennas corresponding to the second BWP, and/or the number of MIMO transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP, which means that the degree of similarity between the first BWP and the second BWP is very high, and the terminal device can send and receive signaling on the new second BWP with almost no preparation work. At this time, the actual handover delay of the terminal device may be zero. The network device and the terminal device may determine that the agreed BWP handover delay is zero, that is, the network device may schedule resources for the terminal device in time.

It should be noted that, if the configuration parameters of the first BWP are closer to the configuration parameters of the second BWP, the shorter the BWP handover delay actually required by the terminal device is, the shorter the BWP handover delay agreed by the terminal device and the network device may be, that is, the actual BWP handover delay is related to the agreed BWP handover. However, the network device does not really know the actual BWP handover delay, but schedules resources for the terminal device according to the agreed BWP handover delay. Therefore, the network device and the terminal device may adjust the agreed BWP handover delay according to the configuration parameters of the first BWP and the configuration parameters of the second BWP, the network device may schedule resources for the terminal device according to the adjusted agreed BWP handover delay, and the terminal device may perform detection and transmission of signaling on the scheduled resources after completing BWP handover, thereby implementing stable signaling transceiving.

Optionally, before the receiving the first indication information on the first time domain resource and on the first bandwidth portion BWP, the method further includes: receiving first radio resource control information, the first radio resource control information including a target BWP configuration parameter indicating a first configuration parameter of the first BWP and a second configuration parameter of the second BWP.

That is, when two different BWPs possess the same configuration parameters, the terminal device may determine first configuration parameters of the first BWP and second configuration parameters of the second BWP according to the target BWP configuration parameters. In other words, the first BWP and the second BWP may share or share the target configuration parameters.

In one example, the terminal device may store two tables, a first table containing configuration parameters for a plurality of BWPs and a second table containing one or more target BWP configuration parameters. Assuming that the first configuration parameters of the first BWP are the same as the second configuration parameters of the second BWP, the index of the target BWP configuration parameters may be filled in at the location in the first table corresponding to the first configuration parameters and the second configuration parameters. When the terminal device performs a handover from the first BWP to the second BWP, it may determine whether the index corresponding to the first configuration parameter is the same as the index corresponding to the second configuration parameter, and if the index corresponding to the first configuration parameter is the same as the index corresponding to the second configuration parameter, the terminal device may not change the first configuration parameter during the BWP handover, that is, continue to use the first configuration parameter, that is, regard the first configuration parameter as the second configuration parameter.

In one example, the terminal device may store a table containing configuration parameters for a plurality of BWPs. Wherein, assuming that the first configuration parameter of the first BWP, the second configuration parameter of the second BWP and the third configuration parameter of the third BWP are all the same, the content of the first configuration parameter may be completely filled in the position corresponding to the first configuration parameter in the table, and the index of the first configuration parameter or the index of the first BWP may be filled in the position corresponding to the second configuration parameter and the position corresponding to the third configuration parameter in the table. When the terminal device determines to switch from the first BWP to the second BWP, according to the index recorded by the second configuration parameter, the terminal device may determine not to change the first configuration parameter during the BWP switch, and continue to use the first configuration parameter, that is, treat the first configuration parameter as the second configuration parameter. Assuming that when the subsequent terminal device determines to switch from the second BWP to the third BWP, since the index corresponding to the second configuration parameter is the same as the index corresponding to the third configuration parameter, which means that the second configuration parameter is the same as the third configuration parameter, the terminal device may not change the second configuration parameter during the BWP switching, and continue to use the second configuration parameter, that is, treat the second configuration parameter as the third configuration parameter. Assuming that the subsequent terminal device determines to switch from the fourth BWP to the second BWP, the terminal device may determine the second configuration parameter according to the content of the index recorded by the second configuration parameter referring to the first configuration parameter.

It should be understood that the above-mentioned embodiments 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. Many modifications and other embodiments of the disclosure will come to mind to one skilled in the art to which this disclosure pertains having the benefit of the teachings presented in the foregoing descriptions. Therefore, it is to be understood that the application is not limited to the specific embodiments disclosed.

The first time domain resource may be a resource in a unit of a slot, a subframe, a radio frame, a mini-slot (mini-slot), or an OFDM symbol.

The first indication information may contain an index of the second BWP, thereby instructing the terminal device to switch the first BWP to the second BWP. The terminal device may determine whether the index of the first BWP currently in use is the same as the index of the second BWP. If the BWP switching is the same as the BWP switching, the terminal device may determine not to perform BWP switching; if not, the terminal device may determine to perform a handover from the first BWP to the second BWP.

The first indication information may include a time slot offset between a start position of a time slot in which the second time domain resource is located and a start position of a time slot in which the first time domain resource is located. When the first data channel is a downlink data channel, the slot offset of the first data channel may be denoted as K₀. When the first data channel is an uplink data channel, the slot offset of the first data channel can be denoted as K₂. FIG. 4 shows that the second time domain resource indicates the time slot offset K of the uplink data channel₂Examples of (2). As shown in fig. 4, the terminal device calculates K backwards according to the starting position of the time slot n where the first time domain resource is located₂Time slot to obtain the time of the second time domain resourceGap n + K₂Such that the terminal device may receive or transmit the first data channel on the second time domain resource. The slot offset indicated by the first indication information may be used to indicate a slot in which the second time domain resource is located. That is, the slot indicated by the slot offset is the same as the slot in which the second time domain resource is located.

The first indication information may be DCI transmitted on a PDCCH. The first data channel may be a PDSCH or a PUSCH. The first indication information may also be other indication information similar to DCI.

302, the terminal device receives or transmits the target signal on the frequency domain resource corresponding to the first BWP or the second BWP on the time domain resource after the end of the first time domain resource and before the beginning of the time slot of the second time domain resource.

Accordingly, the network device transmits or receives the target signal on the frequency domain resource corresponding to the first BWP or the second BWP on the time domain resource after the end of the first time domain resource and before the start of the time slot of the second time domain resource.

That is, after the terminal device receives the first indication information and before the time slot in which the second time domain resource scheduled by the first indication information is located starts, the target signal may be received or transmitted on the second BWP. The target signal may occupy part or all of the time domain resources after the end of the first time domain resource and before the start of the time slot in which the second time domain resource is located. As shown in fig. 4, the first indication information occupies a first time domain resource, the first data channel occupies a second time domain resource, and the target signal is located on the time domain resource after the first time domain resource is ended and before the time slot where the second time domain resource is located starts.

The target Signal may be received, for example, PDCCH and/or PDSCH and/or Channel State Information Reference Signal (CSI-RS), and the target Signal may be transmitted as one or more signals of Physical Uplink Control Channel (PUCCH) and/or PUSCH and/or Sounding Reference Signal (SRS).

Since the frequency-domain position and bandwidth of the first BWP are the same as those of the second BWP, the frequency-domain resources corresponding to the first BWP are the same as those corresponding to the second BWP. In one example, the end device actually receives or transmits the target signal on the first BWP. In one example, the end device actually receives or transmits the target signal on the second BWP. However, since the frequency-domain resource corresponding to the first BWP is the same as the frequency-domain resource corresponding to the second BWP, the terminal device may be described as receiving or transmitting the target signal on the frequency-domain resource corresponding to the first BWP, in addition to being described as receiving or transmitting the target signal on the frequency-domain resource corresponding to the second BWP. Similarly, even if the terminal device receives or transmits the target signal on the first BWP, the terminal device may be described as receiving or transmitting the target signal on the frequency domain resource corresponding to the second BWP, in addition to being described as receiving or transmitting the target signal on the frequency domain resource corresponding to the first BWP.

Receiving or transmitting a target signal on a time domain resource after the first time domain resource ends and before the time slot where the second time domain resource is located begins, which can also be expressed as receiving or transmitting a target signal after the first time domain resource ends and before the time slot indicated by the time slot offset begins.

In one example, the actual BWP handoff latency or the agreed BWP handoff latency is zero.

In other words, the terminal device may receive or transmit the target signal on the second BWP immediately after the end of the first time domain resource. As described above, on the basis that the frequency domain position and the bandwidth of the first BWP are the same as the frequency domain position and the bandwidth of the second BWP, the actual/agreed BWP handover delay may be zero when the number of receive antennas corresponding to the first BWP is the same as the number of receive antennas corresponding to the second BWP, and/or when the number of MIMO transmission layers corresponding to the first BWP is the same as the number of MIMO transmission layers corresponding to the second BWP.

The starting position of the agreed BWP handover delay may be the end position of the third symbol of the slot in which the PDCCH transmitting the DCI is located. The starting position of the agreed BWP handover delay may also be the end position of the last symbol of the PDCCH transmitting the DCI. The starting position of the agreed BWP handover delay may also be the ending position of the time slot where the PDCCH transmitting the DCI is located. Fig. 5 shows an example in which the end position of the slot where the PDCCH for transmitting DCI is located is used as the start position of the agreed BWP handover delay. As shown in fig. 5, the terminal device receives or transmits a target signal on the second BWP. The first indication information occupies a first time domain resource, the first data channel occupies a second time domain resource, the target signal is located after the first time domain resource is ended, and the starting position of the time domain resource where the target signal is located is the same as the ending position of the time slot where the first time domain resource is located.

In one example, a target signal is received or transmitted on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after a target time and before a time slot where the second time domain resource is located starts, where the target time is located after the end of the first time domain resource and before the time slot where the second time domain resource is located starts.

The target time may be, for example, the end time of the agreed BWP handover delay. The above describes the BWP handoff latency scheme based on the configuration parameters of the first BWP and the second BWP, and similarly, the target time may be determined based on the configuration parameters of the first BWP and the second BWP. For example, the closer the configuration parameters of the first BWP are to the configuration parameters of the second BWP, the closer the target time instant is to the end position of the first time domain position.

One possible scenario is that the actual/committed BWP handoff latency is not zero. The target time may be the end time of the BWP handover delay. Fig. 6 shows an example in which the end position of the last symbol of the PDCCH transmitting DCI is used as the start position of the agreed BWP handoff delay. As shown in fig. 6, the first indication information occupies the first time domain resource, the first data channel occupies the second time domain resource, and assuming that the agreed BWP handover delay is 1 slot, the terminal device does not perform signal transceiving within the agreed BWP handover delay. After the agreed BWP handover delay and before the timeslot where the second time domain resource is located, the terminal device receives or transmits the target signal on the second BWP.

In particular, the actual/agreed BWP handoff delay is zero, that is, the terminal device has the capability of receiving or transmitting the target signal on the second BWP from the start position of the BWP handoff delay, but the network device does not schedule the time domain resource corresponding to the start position of the BWP handoff delay. Still taking fig. 5 as an example, it is assumed that the ending position of the last symbol of the PDCCH for transmitting the DCI is used as the starting position of the agreed BWP handover delay, and the agreed BWP handover delay is zero, so that the starting position of the agreed BWP handover delay is the same as the ending position of the agreed BWP handover delay. The target time is a time after the first time domain resource and before the next time slot of the time slot where the first time domain resource is located starts, and the starting position of the time domain resource where the target signal is located after the target time.

In particular, the terminal device may not perform the BWP handover immediately after receiving the first indication information. Then, even if the actual/agreed BWP handover delay is zero, taking fig. 5 as an example, assuming that the end position of the time slot where the PDCCH transmitting the DCI is located is used as the start position of the agreed BWP handover delay, and the agreed BWP handover delay is zero, therefore, the start position of the agreed BWP handover delay is the same as the end position of the agreed BWP handover delay. The target time is a time after the first time domain resource and before the next time slot of the time slot where the first time domain resource is located starts, and the starting position of the time domain resource where the target signal is located after the target time.

Optionally, the method further includes: and determining the lower limit of the target time slot offset as the lower limit of the time slot offset corresponding to the second BWP.

That is, the network device and the terminal device may use the lower limit of the slot offset corresponding to the second BWP as the lower limit of the slot offset to be used after switching to the second BWP.

The first indication information includes an indication to switch to the second BWP,and under the condition of containing the scheduling information indicating the first data channel, the network device determines that the target time slot offset lower limit is the time slot offset lower limit corresponding to the second BWP. As shown in fig. 7, the target signal includes the fourth indication information. The lower limit of the time slot offset corresponding to the second BWP is K_0minAnd 0, after the terminal device switches to the second BWP and before the terminal device receives the fourth indication information for the first time on the second BWP, setting the target slot offset lower limit to the slot offset lower limit used by the second BWP. The terminal device may process the fourth indication information according to the lower limit of the slot offset corresponding to the second BWP, that is, the terminal device receives the fourth indication information in the slot n, and processes the fourth indication information in the slot n + K_0minThe decoding of the fourth indication information is completed before 0. And, since the target slot offset lower limit is the slot offset lower limit used by the second BWP, the slot in which the fourth data channel is located may be the slot n + K_0minThe time slot after 0. The time domain position of the fourth data channel is located behind the time domain position of the first data channel, as shown in fig. 7.

Optionally, before the receiving the first indication information on the first time domain resource and on the first bandwidth portion BWP, the method further includes: receiving second radio resource control information, wherein the second radio resource control information comprises a plurality of time slot offset lower limits and a plurality of indexes which are in one-to-one correspondence with the time slot offset lower limits; in a case where the first indication information further includes information indicating a target index, the method further includes: and determining a target time slot offset lower limit as a time slot offset lower limit corresponding to the target index, wherein the target index is one of the plurality of indexes.

That is, if the second indication information indicates a target index corresponding to the RRC-configured slot offset lower limit, the slot offset lower limit used by the terminal device after switching to the second BWP is the slot offset lower limit corresponding to the target index.

And under the condition that the second indication information also contains information indicating the target index, the network equipment determines the lower limit of the target time slot offset as the lower limit of the time slot offset corresponding to the target index. As shown in fig. 8, the target signal includes the fourth indication information. The lower limit of the time slot offset corresponding to the target index is K_0minAnd 0, after the terminal device switches to the second BWP and before the terminal device receives the fourth indication information for the first time on the second BWP, setting the target slot offset lower limit as the slot offset lower limit corresponding to the target index. The terminal device may process the fourth indication information according to the time slot offset lower limit corresponding to the target index, that is, the terminal device receives the fourth indication information in the time slot n, and processes the fourth indication information in the time slot n + K_0minThe decoding of the fourth indication information is completed before 0. Moreover, since the target timeslot offset lower limit is the timeslot offset lower limit corresponding to the target index, the timeslot in which the fourth data channel is located may be timeslot n + K_0minThe time slot after 0. The time domain position of the fourth data channel is located behind the time domain position of the first data channel, as shown in fig. 7.

In one example, the terminal device receives fourth indication information, and in the case that the fourth indication information indicates one of the slot offset lower limits, the target slot offset lower limit is the slot offset lower limit indicated by the fourth indication information; and when the fourth indication information does not indicate one of the slot offset lower limits, the target slot offset lower limit is a slot offset lower limit corresponding to the second BWP. Whether the fourth indication information indicates one of the plurality of slot offset lower limits is determined by the radio resource configuration information in advance.

Optionally, the method further includes: a timer is started.

The terminal device may start a timer after receiving the first indication information.

In one example, when the timer counts time, the lower limit of the slot offset used by the terminal device is the lower limit of the slot offset corresponding to the target index. When the timer receives new indication information indicating one of the slot offset lower limits in the counting process, the terminal device may set the timer to restart, and determine a new slot offset lower limit according to the new indication information. When the timer is completed (the timer is stopped), the lower limit of the slot offset used by the terminal device is the lower limit of the slot offset corresponding to the second BWP.

Optionally, the lower limit of the timeslot offset corresponding to the second BWP is a minimum lower limit of the timeslot offset in the time domain resource allocation list on the second BWP.

That is to say, the network device does not need to separately configure the lower limit of the timeslot offset corresponding to the second BWP in the configuration parameters of the second BWP, and both the network device and the terminal device may determine the lower limit of the timeslot offset corresponding to the second BWP according to the TDRA list in the configuration parameters of the second BWP. The TDRA list includes a plurality of time slot offsets and a plurality of indices corresponding to the plurality of time slot offsets one to one, that is, when the network device schedules resources for the terminal device on the second BWP, any time slot offset in the TDRA list of the second BWP may be used, so the minimum value of the time slot offset in the TDRA list of the second BWP may be regarded as the lower limit of the time slot offset of the second BWP.

In the present application, the target signal may be one or more of CSI-RS, PDCCH, PDSCH, SRS, PUCCH (including channel state information, CSI), hybrid automatic repeat request-acknowledgement (HARQ-ACK), and PUSCH.

In the embodiment of the present application, since the frequency domain positions and bandwidths of two BWPs before and after the handover are the same, the BWP handover delay actually required by the terminal device is very short, and can even be as low as zero. If the network device and the terminal device do not perform signaling interaction during the agreed BWP handover delay, the waste of time-frequency resources will be undoubtedly caused, and the delay of data transmission will be increased. Therefore, when the network device determines that the frequency domain position and the bandwidth of the first BWP are the same as the frequency domain position and the bandwidth of the second BWP, it may be considered that the BWP handover delay actually required by the terminal device is very short, and the terminal device may send or receive the target signal before sending the first data channel, thereby avoiding waste of time-frequency resources and avoiding additional increase of transmission delay. Accordingly, the terminal device determines that the frequency domain position and the bandwidth of the first BWP are the same as the frequency domain position and the bandwidth of the second BWP, and may perform BWP handover as soon as possible, so that the terminal device may continue to receive or transmit the target signal on the new BWP before receiving or transmitting the first data channel, thereby avoiding waste of time-frequency resources and additional increase of transmission delay.

The network device may indicate data transmitted on the PDSCH or PUSCH through the DCI. When the DCI and the PDSCH are positioned in the same time slot, the PDSCH/PUSCH scheduled by the DCI belongs to simultaneous slot scheduling; when the DCI and the PDSCH are located in different time slots, the PDSCH/PUSCH scheduled by the DCI belongs to cross-slot scheduling. The DCI may indicate a slot offset K₀Thereby indicating a slot offset between the slot in which the DCI is located and the slot in which the DCI scheduled PDSCH is located. The DCI may indicate a slot offset K₂Thereby indicating the time slot offset between the time slot in which the DCI is positioned and the time slot in which the PUSCH scheduled by the DCI is positioned. To save energy consumption, the network device may indicate the lower limit K of the slot offset to the terminal device through RRC in advance_0minI.e. indicating the minimum value of the slot offset of the terminal equipment, i.e. indicating the slot offset K₀Must be greater than or equal to K_0min. For example, when the slot offset lower bound K_0minWhen 1, it means K₀And the scheduling information is more than or equal to 1, so that the PDSCH scheduled by the DCI does not belong to the scheduling of the same time slot, and after the terminal equipment receives the DCI, whether the scheduling of the DCI belongs to the scheduling of the same time slot can be known even if the DCI is not decoded. Similarly, the network device may indicate the slot offset lower limit K to the terminal device in advance_2minI.e. indicating the minimum value of the slot offset of the terminal equipment, i.e. indicating the slot offset K₂Must be greater than or equal to K_2min. In this application, the lower limit of the slot offset may be a lower limit K of the downlink slot offset, if not specifically stated otherwise_0minAnd an uplink slot offset lower bound K_2minOne of them.

Three methods by which the lower limit of the slot offset may be determined are described below.

The method comprises the following steps: associating the BWPs with the slot offset lower limit, that is, each BWP corresponds to one slot offset lower limit, and when the DCI indicates to switch to the target BWP, determining that the slot offset lower limit after completing the BWP switch is the slot offset lower limit corresponding to the target BWP. For example, BWP1 may correspond to a slot offset with a lower bound of K_0min1, BWP2 has a lower bound on the slot offset of K_0min2; when the terminal device uses BWP1, the lower limit of the slot offset used by the terminal device is K_0min1; when the terminal device switches from BWP1 to BWP2, the lower limit of the slot offset used by the terminal device after completion of BWP switching is K_0min2。

The second method comprises the following steps: and the network equipment sends RRC to the terminal equipment, wherein the RRC comprises a plurality of time slot offset lower limits and index values which are in one-to-one correspondence with the time slot offset lower limits, and indicates the subsequently used time slot offset lower limits to the network equipment through the index values carried in the DCI. For example, RRC configuration K_0minThe index of 1 is index 1, K_0min2 index 2, K_0min3, index 3; when the DCI carries the information of index 1, the terminal device may determine that the lower limit of the slot offset used after receiving the DCI is K_0min1。

The third method comprises the following steps: the network equipment sends RRC to the terminal equipment, wherein the RRC comprises two time slot offset lower limits, one time slot offset lower limit corresponds to the simultaneous time slot scheduling, and the other time slot offset lower limit corresponds to the cross-time slot scheduling. When the terminal device receives the DCI, the terminal device uses the slot offset lower limit corresponding to the simultaneous slot scheduling as a slot offset lower limit for subsequent use, and starts a timer (timer). And under the condition that the timer stops timing, namely DCI scheduling data is not received within a period of time, the terminal equipment takes the time slot offset lower limit corresponding to cross-time-slot scheduling as a time slot offset lower limit used subsequently. For example, RRC configuration K_0min1 and K_0min2，K _0min1 is 0, and K_0min2>K _0min1; when the terminal device receives the DCI1, the terminal device may determine that the lower limit of the slot offset used after receiving the DCI1 is K_0min1, starting a timer; upon receiving the DCI2 before the timer count is stopped, the terminal device sets the timer to re-count, and determines that the lower limit of the slot offset used after receiving the DCI2 is K_0min1; when new DCI is not received before the timer timing is stopped, the terminal device may determine that the lower limit of the slot offset used after the timer timing is stopped is K_0min2。

When the network device configures the lower limit of the slot offset corresponding to the BWP for the terminal device through the first method and indicates the lower limit of the slot offset irrelevant to the BWP through the second method or the third method, the terminal device will generate contradictions, and it is not possible to determine which method is used to determine the lower limit of the slot offset.

For example, BWP1 may correspond to a slot offset with a lower bound of K_0min0, RRC configuration K_0minThe index of 1 is index 1, K_0min2 index 2, and K_0min0≠K _0min1; when the DCI carries the information of index 1, the terminal device cannot determine that the lower limit of the slot offset used after receiving the DCI is K_0minWhether 0 or K_0min1。

For another example, BWP1 may correspond to a slot offset with a lower bound of K_0min0, RRC configuration K_0min1 and K_0min2，K _0min1 is 0, and K_0min0≠K _0min1; when the terminal device receives the DCI1, the terminal device cannot determine that the lower limit of the slot offset used after receiving the DCI1 is K_0minWhether 0 or K_0min1。

For another example, BWP1 may correspond to a slot offset with a lower bound of K_0min0, RRC configuration K_0min1 and K_0min2，K _0min1 is 0, and K_0min2≠K _0min1; when the timer count is stopped, the terminal device cannot determine that the lower limit of the slot offset used after the timer count is stopped is K_0min2 or K_0min0。

Fig. 8 illustrates a method of determining a lower limit of the slot offset.

901, the network device sends third radio resource control information indicating a lower limit of the first slot offset.

Accordingly, the terminal device acquires the first slot offset lower limit indicated by the third radio resource control information.

That is, the network device configures the first slot offset lower limit for the terminal device through RRC.

In the present application, "acquiring" may be understood as receiving, and may also be understood as reading from a memory.

Optionally, the third rrc information is further used to indicate a second slot offset lower limit.

That is, the third radio resource control information indicates a plurality of slot offset lower limits.

Optionally, the first slot offset lower limit is smaller than the second slot offset lower limit.

That is, if the terminal device uses the first slot offset lower limit, the power consumption of the terminal device is increased; if the terminal device uses the second slot offset lower limit, the time delay of the terminal device for processing information can be prolonged.

In one example, a first lower slot offset limit may correspond to a simultaneous slot schedule and a second lower slot offset limit corresponds to a cross slot schedule. When the first time slot offset lower limit corresponds to the synchronous time slot scheduling, the value of the first time slot offset lower limit is 0, and the value of the second time slot chip offset lower limit is greater than 0.

Optionally, the third rrc message indicates a plurality of slot offset lower limits and a plurality of slot offset lower limit indexes corresponding to the plurality of slot offset lower limits in a one-to-one manner, where the plurality of slot offset lower limits include the first slot offset lower limit.

And 902, the network equipment sends second indication information, wherein the second indication information indicates the scheduling information of the second data channel.

Accordingly, the terminal device receives the second indication information.

That is, the network device configures the resource for the second data channel through the second indication information.

The scheduling information of the second data channel may include, for example, an index of a time domain resource and/or a frequency domain resource on which the second data channel is transmitted. The scheduling information of the second data channel may for example comprise a time slot offset between the start position of the time slot in which the second indication information is located and the start position of the time slot in which the second data channel is located. The terminal device may determine to receive or transmit the resource of the second data channel according to the second indication information.

The second indication information may be DCI.

The second data channel may be a PUSCH or a PDSCH.

903a, in a case that the second indication information further indicates to switch to a third BWP, the network device determines that the target timeslot offset lower limit is the timeslot offset lower limit corresponding to the third BWP.

Correspondingly, in the case that the second indication information further indicates switching to a third BWP, the terminal device determines that the target slot offset lower limit is the slot offset lower limit corresponding to the third BWP.

That is, when the second indication information indicates BWP switching, the network device takes the lower limit of the slot offset corresponding to the third BWP as the lower limit of the slot offset to be used after switching to the third BWP.

For example, the network device configures the terminal device with the lower limit of the slot offset corresponding to the third BWP as K_0min0, when the DCI indicates to switch to the third BWP, the network device will K_0min0 is used as the lower limit of the slot offset used after switching to the third BWP.

As shown in fig. 9, in the case that the second indication information includes a schedule information indicating switching to the third BWP and includes a schedule information indicating the second data channel, the network device determines that the target slot offset lower limit is the slot offset lower limit corresponding to the third BWP. As shown in fig. 9, the lower limit of the slot offset for the third BWP is K_0min0, before the network device receives the fifth indication information for the first time on the third BWP, the lower limit of the target slot offset is the lower limit of the slot offset corresponding to the third BWP. The network device may process the fifth indication information according to the timeslot offset lower limit corresponding to the third BWP, that is, the terminal device receives the fifth indication information in timeslot n and processes the fifth indication information in timeslot n + K_0minThe decoding of the fifth indication information is completed before 0. And, since the target slot offset lower limit is the secondThe lower limit of the slot offset used by three BWPs, the slot where the fifth data channel is located may be slot n + K_0minThe time slot after 0.

Optionally, the lower limit of the timeslot offset corresponding to the third BWP is a minimum lower limit of the timeslot offset in the time domain resource allocation list on the third BWP.

That is to say, the network device does not need to separately configure the lower limit of the timeslot offset corresponding to the third BWP in the configuration parameters of the third BWP, and both the network device and the terminal device may determine the lower limit of the timeslot offset corresponding to the third BWP according to the TDRA list in the configuration parameters of the third BWP. The TDRA list includes a plurality of time slot offsets and a plurality of indices corresponding to the plurality of time slot offsets one to one, that is, when the network device schedules resources for the terminal device on the third BWP, any time slot offset in the TDRA list of the third BWP may be used, so the minimum value of the time slot offset in the TDRA list of the third BWP may be regarded as the lower limit of the time slot offset of the third BWP.

903b, in a case that the second indication information does not indicate switching to the third BWP, the network device determines that the target timeslot offset lower limit is the first timeslot offset lower limit.

Accordingly, in a case where the second indication information does not indicate a switch to the third BWP, the terminal device determines that the target slot offset lower limit is the first slot offset lower limit.

That is, when the network device does not instruct BWP handover, the network device uses the first lower slot offset limit indicated by the RRC as the lower slot offset limit used after receiving the second indication message.

Three ways for the terminal device and/or the network device to determine the lower limit of the target slot offset without receiving the BWP handover indication information are described below through three possible scenarios.

In a first mode

The third rrc message indicates the first slot offset lower limit, and the terminal device receives second indication information on a fifth BWP currently in use, where the second indication information indicates scheduling information of the second data channel and the second indication information does not indicate a switch to the third BWP. Then, the terminal device determines, according to the indication of the network device, that the target timeslot offset lower limit used after receiving the second indication information is the first timeslot offset lower limit.

Optionally, the method further includes: a timer is started.

The terminal device may start the timer after receiving the second indication information. And under the condition that the timer counts time, the lower limit of the time slot offset used by the terminal equipment is the first lower limit of the time slot offset. The terminal device may set the timer to re-count in case the timer receives a new indication in the counting. When the timer stops counting, the lower limit of the slot offset used by the terminal device is the lower limit of the slot offset corresponding to the fifth BWP.

Mode two

The third rrc message indicates a first slot offset lower limit and a second slot offset lower limit, wherein the first slot offset lower limit is smaller than the second slot offset lower limit. The terminal device receives second indication information on a fifth BWP currently in use, the second indication information indicating scheduling information of the second data channel, the second indication information not indicating a switch to the third BWP. Then, the terminal device determines, according to the indication of the network device, that the target timeslot offset lower limit used after receiving the second indication information is the first timeslot offset lower limit.

Optionally, the method further includes: a timer is started.

The terminal device may start the timer after receiving the second indication information.

In one example, the timer starts counting from 0, and in the case that the timer counts less than a preset threshold 1 (the preset threshold 1 is not zero), the timeslot offset lower limit used by the terminal device is the first timeslot offset lower limit. Under the condition that the timing of the timer is greater than or equal to a preset threshold value 1, the terminal equipment compares the second time slot offset lower limit with a time slot offset lower limit corresponding to a fifth BWP; if the second timeslot offset lower limit is smaller than the timeslot offset lower limit corresponding to the fifth BWP, the timeslot offset lower limit used by the terminal device is the second timeslot offset lower limit when the preset threshold 1 is not greater than the timing of the timer and smaller than the preset threshold 2, and the timeslot offset lower limit used by the terminal device is the timeslot offset lower limit corresponding to the fifth BWP when the timing of the timer is greater than or equal to the preset threshold 2; if the second timeslot offset lower limit > is the timeslot offset lower limit corresponding to the fifth BWP, the timeslot offset lower limit used by the terminal device is the timeslot offset lower limit corresponding to the fifth BWP when the preset threshold 1 is not greater than the timing of the timer < the preset threshold 2, and the timeslot offset lower limit used by the terminal device is the second timeslot offset lower limit when the timing of the timer is greater than or equal to the preset threshold 2. Receiving the new indication information when the timer counts less than the preset threshold 2, the terminal device may reset the timer to 0 and continue to count. The method for counting down the timer is similar to the method for starting the timer from zero, and therefore, the detailed description thereof is omitted.

In one example, in a case where the timer is counting, the lower limit of the slot offset used by the terminal device is the first lower limit of the slot offset. The terminal device may set the timer to re-count in case the timer receives a new indication in the counting. And under the condition that the timer stops counting, the lower limit of the time slot offset used by the terminal equipment is the second lower limit of the time slot offset. Upon receiving the new indication in the event that the timer has stopped, the terminal device may set the timer to be restarted.

Mode III

The third rrc message indicates a plurality of slot offset lower limits and a plurality of slot offset lower limit indexes corresponding to the plurality of slot offset lower limits one to one, where the plurality of slot offset lower limits include the first slot offset lower limit. The terminal device receives second indication information on a fifth BWP currently in use, where the second indication information indicates scheduling information of a second data channel, the second indication information does not indicate switching to a third BWP, and the second indication information indicates a slot offset lower limit index corresponding to the first slot offset lower limit. Then, the terminal device determines, according to the indication of the network device, that the target timeslot offset lower limit used after receiving the second indication information is the first timeslot offset lower limit.

Optionally, the method further includes: a timer is started.

In one example, in a case where the timer is counting, the lower limit of the slot offset used by the terminal device is the first lower limit of the slot offset. When the timer receives new indication information indicating one of the slot offset lower limits in the counting process, the terminal device may set the timer to restart, and determine a new slot offset lower limit according to the new indication information. When the timer stops counting, the lower limit of the slot offset used by the terminal device is the lower limit of the slot offset corresponding to the fifth BWP.

The method for counting down the timer is similar to the method for starting the timer from zero, and therefore, the detailed description thereof is omitted.

In the embodiment of the present application, according to the embodiment shown in fig. 8, the terminal device may determine the time slot offset lower limit used subsequently according to the content of the indication information, which is beneficial to switch the time slot offset lower limit value to the time slot offset lower limit value corresponding to the power saving mode (also referred to as cross-slot scheduling) by using a new BWP, instead of switching to the time slot offset lower limit value corresponding to the power saving mode (also referred to as simultaneous slot scheduling) with data scheduling.

In another possible embodiment, the network device may specify that the terminal device determines that the target timeslot offset lower limit is the timeslot offset lower limit corresponding to the third BWP when the second indication information includes the indication of switching to the third BWP and includes information indicating the target index in an RRC configuration manner. In a case where the second indication information contains the switch to the third BWP and does not contain information indicating the target index, the terminal device does not perform the BWP switch. The value of the target index may be specified as a fixed value (e.g., the value of the target index of two bits is fixed to "00"). This is advantageous to reduce the false alarm probability of the BWP handover indication, i.e. the network device does not send the BWP handover indication, but the terminal device detects the BWP handover indication, and if the detected index is not the target index, the terminal device may consider the BWP handover indication as false alarm.

Fig. 10 is a schematic flow chart of a communication method according to an embodiment of the present application.

1101, the network device transmits fourth radio resource control information, where the fourth radio resource control information includes a plurality of slot offset lower limits and a plurality of indexes corresponding to the plurality of slot offset lower limits one to one.

Accordingly, the terminal device receives the fourth radio resource control information.

That is, the network device configures a plurality of lower slot offset limits for the terminal device through RRC, and the network device may indicate one of the plurality of lower slot offset limits to the terminal device by indicating an index.

The network device sends third indication information 1102, the third indication information including information indicating a switch to a fourth BWP.

Accordingly, the terminal device receives the third indication information.

That is, the network device instructs the terminal device to perform BWP handover, and the BWP after the handover is the fourth BWP.

1103a, in a case that the third indication information further includes information indicating a target index, the network device determines that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the target index, where the target index is one of the multiple indexes.

Correspondingly, in the case that the third indication information further includes information indicating a target index, the terminal device determines that the target slot offset lower limit is a slot offset lower limit corresponding to the target index, where the target index is one of the multiple indexes.

That is, if the third indication information indicates a target index corresponding to the RRC-configured slot offset lower limit, the slot offset lower limit used by the terminal device after switching to the fourth BWP is the slot offset lower limit corresponding to the target index.

In the case where the third indication information includes information indicating a handover to a fourth BWP and includes information indicating a target index, the network device determines a target slot offset lower limitThe time slot offset lower limit corresponding to the target index. As shown in fig. 9, the lower limit of the slot offset corresponding to the target index is K_0min0, before the network device receives the sixth indication information for the first time on the fourth BWP, the target slot offset lower limit is the slot offset lower limit corresponding to the target index. The network device may process the sixth indication information according to the timeslot offset lower limit corresponding to the target index, that is, the terminal device receives the sixth indication information in timeslot n, and processes the sixth indication information in timeslot n + K_0minThe decoding of the sixth indication information is completed before 0. Moreover, since the target timeslot offset lower limit is the timeslot offset lower limit corresponding to the target index, the timeslot where the sixth data channel is located may be timeslot n + K_0minThe time slot after 0.

1103b, in a case that the third indication information does not include information indicating a target index, the network device determines that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the fourth BWP.

Accordingly, in a case where the third indication information does not include information indicating a target index, the terminal device determines the target slot offset lower limit as a slot offset lower limit corresponding to the fourth BWP.

That is, if the third indication information does not indicate the target index corresponding to the RRC-configured slot offset lower limit, the lower limit of the slot offset used by the terminal device after switching to the fourth BWP is the lower limit of the slot offset corresponding to the fourth BWP.

And when the third indication information contains the indication of switching to the fourth BWP and does not contain the information indicating the target index, the network device determines that the lower limit of the target slot offset is the lower limit of the slot offset corresponding to the fourth BWP. The lower limit of the time slot offset corresponding to the fourth BWP is K_0min0, before the network device receives the sixth indication information for the first time on the fourth BWP, the lower limit of the target slot offset is the lower limit of the slot offset corresponding to the fourth BWP. The network device may process the sixth indication information according to the timeslot offset lower limit corresponding to the fourth BWP, that is, the terminal device receives the sixth indication information in timeslot n and processes the sixth indication information in timeslot n + K_0minThe decoding of the sixth indication information is completed before 0. And, due to the objectThe lower limit of the slot offset is the lower limit of the slot offset used by the fourth BWP, and the slot where the fifth data channel is located may be the slot n + K_0minThe time slot after 0.

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 apparatus 1200 may include a transceiver module 1201.

A transceiving module 1201, configured to receive first indication information on a first partial bandwidth BWP on a first time domain resource, where the first indication information indicates switching to a second BWP and indicates receiving or transmitting a first data channel on a second time domain resource, and a frequency domain position and a bandwidth of the first BWP are the same as a frequency domain position and a bandwidth of the second BWP.

The transceiving module 1201 is further configured to receive or transmit a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts, and receive or transmit the first target signal according to the first transmission information.

The transceiving module 1201 may be implemented by a receiver and/or a transmitter. The specific functions and advantages of the transceiver module 1201 can be seen in the method shown in fig. 3, 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 network device or may be a component (e.g., a chip or a circuit) that may be used in a network device. As shown in fig. 12, the communication device 1300 may include a transceiver module 1301.

A transceiving module 1301, configured to send first indication information on a first time domain resource and on a first partial bandwidth BWP, where the first indication information indicates switching to a second BWP and indicates receiving or sending a first data channel on a second time domain resource, and a frequency domain position and a bandwidth of the first BWP are the same as a frequency domain position and a bandwidth of the second BWP.

The transceiver module 1301 is further configured to receive or transmit a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts.

The transceiver module 1301 may be implemented by a receiver and/or a transmitter. The specific functions and advantages of the transceiver module 1301 can be seen in the method shown in fig. 3, and are not described herein again.

In one possible embodiment, a communication apparatus is also provided, and the communication apparatus may be a network device or may be a component (e.g., a chip or a circuit, etc.) for the network 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. 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 communications apparatus 1400 may include an acquisition module 1401, a receiving module 1402, and a processing module 1403.

An obtaining module 1401, configured to obtain the first slot offset lower limit indicated by the third rrc message.

A receiving module 1402, configured to receive second indication information, where the second indication information indicates scheduling information of a second data channel.

A processing module 1403, wherein in a case that the second indication information further indicates switching to a third BWP, the processing module 1403 is configured to determine that a target lower slot offset limit is a lower slot offset limit corresponding to the third BWP; otherwise, the processing module 1403 is configured to determine that the target timeslot offset lower limit is the first timeslot offset lower limit.

The acquisition module 1401 may be implemented by a receiver and/or a processor. The receiving module 1402 may be implemented by a receiver. The processing module 1403 may be implemented by a processor. The specific functions and advantages of the obtaining module 1401, the receiving module 1402 and the processing module 1403 may refer to the method shown in fig. 8, and are not described herein again.

Fig. 14 is a schematic structural diagram of a communication device provided according to an embodiment of the present application. The communication device may be a network device or may be a component (e.g., a chip or a circuit) that may be used in a network device. As shown in fig. 14, the communication apparatus 1500 may include a transmitting module 1501 and a processing module 1502.

A sending module 1501, configured to send third radio resource control information indicating a lower limit of the first slot offset.

The sending module 1501 is further configured to send second indication information, where the second indication information indicates scheduling information of a second data channel.

A processing module 1502, wherein in a case that the second indication information further indicates to switch to a third BWP, the processing module 1502 is configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to the third BWP; otherwise, the processing module 1502 is configured to determine that the target timeslot offset lower limit is the first timeslot offset lower limit.

The sending module 1501 may be implemented by a transmitter. The processing module 1502 may be implemented by a processor. The specific functions and advantages of the sending module 1501 and the processing module 1502 can refer to the method shown in fig. 8, and are not described herein again.

Fig. 15 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. 15, the communication device 1600 may include a receiving module 1601 and a processing module 1602.

A receiving module 1601, configured to receive fourth rrc message, where the fourth rrc message includes a plurality of slot offset lower limits and a plurality of indexes corresponding to the slot offset lower limits one to one.

The receiving module 1601 is further configured to receive third indication information, where the third indication information includes information indicating to switch to a fourth BWP.

A processing module 1602, where, in a case that the third indication information further includes information indicating a target index, the processing module 1602 is configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to the target index, where the target index is one of the plurality of indexes;

otherwise, the processing module 1602 is configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the fourth BWP.

The receiving module 1601 may be implemented by a receiver. The processing module 1602 may be implemented by a processor. The specific functions and advantages of the receiving module 1601 and the processing module 1602 can refer to the method shown in fig. 10, and are not described herein again.

Fig. 16 is a schematic structural diagram of a communication device provided according to an embodiment of the present application. The communication device may be a network device or may be a component (e.g., a chip or a circuit) that may be used in a network device. As shown in fig. 16, the communication apparatus 1700 may include a transmitting module 1701 and a processing module 1702.

A sending module 1701 is configured to send fourth radio resource control information, where the fourth radio resource control information includes a plurality of slot offset lower limits and a plurality of indexes in one-to-one correspondence with the plurality of slot offset lower limits.

The sending module 1701 is further configured to send third indication information, where the third indication information includes information indicating switching to a fourth BWP.

A processing module 1702, where, in a case that the third indication information further includes information indicating a target index, the processing module 1702 is configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to the target index, where the target index is one of the multiple indexes;

otherwise, the processing module 1702 is configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the fourth BWP.

The transmitting module 1701 may be implemented by a transmitter. The processing module 1702 may be implemented by a processor. The specific functions and advantages of the sending module 1701 and the processing module 1702 may refer to the method shown in fig. 10, and will not be described herein again.

In one possible embodiment, a communication apparatus is also provided, and the communication apparatus may be a network device or may be a component (e.g., a chip or a circuit, etc.) for the network 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 sending 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. 17 is a block diagram of a communication device according to an embodiment of the present application. The communication device may be a terminal device. As shown in fig. 17, the terminal device includes a processor 1801, a memory 1802, a radio frequency circuit, an antenna, and input-output means. The processor 1801 may be used for processing communication protocols and communication data, controlling the terminal device, executing software programs, processing data of the software programs, and the like. The memory 1802 is primarily used for storing 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 sent, the processor 1801 performs baseband processing on the data to be sent, and outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends 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. 17. 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 with transceiving function may be regarded as the transceiver 1803 of the terminal device, and the processor with 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. Optionally, a device for implementing a receiving function in the transceiver 1803 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver 1803 may be regarded as a transmitting unit, that is, the transceiver 1803 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 1801, memory 1802, and transceiver 1803 communicate control and/or data signals therebetween via the internal connection paths.

The method disclosed in the embodiments of the present application may be applied to the processor 1801, or implemented by the processor 1801. The processor 1801 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1801.

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 application 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 application 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 1802 may store instructions for performing the methods performed by the terminal device in the methods shown in fig. 3, 8, and 10. The processor 1801 may execute the instructions stored in the memory 1802, and in combination with other hardware (e.g., the transceiver 1803), to perform the steps performed by the terminal device in the methods shown in fig. 3, 8, and 10, and the specific working procedures and advantages may be as described in the embodiments shown in fig. 3, 8, and 10.

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.

Fig. 18 is a block diagram of a communication device according to an embodiment of the present application. The communication device may be a network device. As shown in fig. 18, the network device includes a processor 1901, a memory 1902, radio frequency circuitry, an antenna, and input-output means. The processor 1901 may be used for processing communication protocols and communication data, controlling network devices, executing software programs, processing data of software programs, and the like. The memory 1902 is used primarily for storing 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 network devices may not have input/output devices.

When data needs to be sent, the processor 1901 performs baseband processing on the data to be sent, and outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the network 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. 18. In an actual network 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 rf circuit with transceiving function may be regarded as the transceiver 1903 of the network device, and the processor with processing function may be regarded as the processing unit of the network 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 1903 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver 1903 may be regarded as a transmitting unit, that is, the transceiver 1903 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 1901, memory 1902, and transceiver 1903 communicate with one another, passing control and/or data signals, over the internal connection.

The method disclosed in the embodiments of the present application may be applied to the processor 1901, or implemented by the processor 1901. The processor 1901 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1901.

Optionally, in some embodiments, memory 1902 may store instructions for performing a method performed by a network device of the methods shown in fig. 3, 8, or 10. The processor 1901 may execute the instructions stored in the memory 1902 to perform the steps performed by the network device in the method of fig. 3, 8 or 10 in combination with other hardware (e.g., the transceiver 1903), and the specific operation and advantages can be seen from the description of the embodiment of fig. 3, 8 or 10

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 network equipment side in the method embodiment.

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

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

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

A method of communication, comprising:

receiving first indication information on a first partial bandwidth BWP on a first time domain resource, the first indication information indicating a switch to a second BWP and indicating a reception or transmission of a first data channel on a second time domain resource, a frequency domain position and a bandwidth of the first BWP being the same as a frequency domain position and a bandwidth of the second BWP;

and receiving or transmitting a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts.
The communication method of claim 1, wherein the receiving or transmitting the target signal on the frequency domain resource corresponding to the first BWP or the second BWP on the time domain resource after the end of the first time domain resource and before the start of the time slot where the second time domain resource is located comprises:

and receiving or sending a target signal on the frequency domain resource corresponding to the first BWP or the second BWP after a target time and before the time slot of the second time domain resource begins, wherein the target time is after the end of the first time domain resource and before the time slot of the second time domain resource begins.
The communication method of claim 1, wherein the number of receive antennas for the first BWP is the same as the number of receive antennas for the second BWP, and/or wherein the number of MIMO transmission layers for the first BWP is the same as the number of MIMO transmission layers for the second BWP.
The communication method according to any of claims 1 to 3, wherein prior to said receiving first indication information on the first time domain resource, on the first portion of bandwidth BWP, the method further comprises:

receiving first radio resource control information, the first radio resource control information including a target BWP configuration parameter indicating a first configuration parameter of the first BWP and a second configuration parameter of the second BWP.
The communication method according to any of claims 1 to 4, wherein the method further comprises:

and determining the lower limit of the target time slot offset as the lower limit of the time slot offset corresponding to the second BWP.
The method of communication according to any of claims 1 to 4, wherein prior to said receiving first indication information on the first time domain resource, on the first portion of bandwidth BWP, the method further comprises:

receiving second radio resource control information, wherein the second radio resource control information comprises a plurality of time slot offset lower limits and a plurality of indexes which are in one-to-one correspondence with the time slot offset lower limits;

in a case where the first indication information further includes information indicating a target index, the method further includes:

and determining a target time slot offset lower limit as a time slot offset lower limit corresponding to the target index, wherein the target index is one of the plurality of indexes.
A method of communication, comprising:

acquiring a first slot offset lower limit indicated by the third radio resource control information;

receiving second indication information indicating scheduling information of a second data channel;

determining a target timeslot offset lower limit as a timeslot offset lower limit corresponding to a third BWP if the second indication information further indicates switching to the third BWP;

otherwise, determining the target timeslot offset lower limit as the first timeslot offset lower limit.
The communication method of claim 7, wherein the lower bound of the slot offset for the third BWP is a minimum slot offset in the list of time domain resource allocations on the third BWP.
The communication method according to claim 7 or 8, wherein the obtaining the first slot offset lower limit indicated by the third rrc message comprises:

and acquiring the first time slot offset lower limit and a second time slot offset lower limit indicated by the third radio resource control information, wherein the first time slot offset lower limit is smaller than the second time slot offset lower limit.
A method of communication, comprising:

receiving fourth radio resource control information, wherein the fourth radio resource control information comprises a plurality of time slot offset lower limits and a plurality of indexes which are in one-to-one correspondence with the time slot offset lower limits;

receiving third indication information including information indicating a switch to a fourth BWP;

determining a target slot offset lower limit as a slot offset lower limit corresponding to a target index under the condition that the third indication information further includes information indicating the target index, wherein the target index is one of the plurality of indexes;

otherwise, determining the target timeslot offset lower limit as a timeslot offset lower limit corresponding to the fourth BWP.
A method of communication, comprising:

transmitting first indication information on a first partial bandwidth BWP on a first time domain resource, the first indication information indicating a switch to a second BWP and indicating reception or transmission of a first data channel on a second time domain resource, a frequency domain position and a bandwidth of the first BWP being the same as a frequency domain position and a bandwidth of the second BWP;

and receiving or transmitting a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts.
The communication method of claim 11, wherein the receiving or transmitting the target signal on the frequency domain resource corresponding to the first BWP or the second BWP on the time domain resource after the end of the first time domain resource and before the start of the time slot where the second time domain resource is located comprises:

and receiving or sending a target signal on the frequency domain resource corresponding to the first BWP or the second BWP after a target time and before the time slot of the second time domain resource begins, wherein the target time is after the end of the first time domain resource and before the time slot of the second time domain resource begins.
The communication method according to claim 11, wherein the number of receiving antennas for the first BWP is the same as the number of receiving antennas for the second BWP, and/or the number of MIMO transmission layers for the first BWP is the same as the number of MIMO transmission layers for the second BWP.
The method of communication according to any of claims 11 to 13, wherein prior to said receiving first indication information on a first portion of bandwidth BWP on a first time domain resource, the method further comprises:

sending first radio resource control information, where the first radio resource control information includes a target BWP configuration parameter, and the target BWP configuration parameter is used to indicate a first configuration parameter of the first BWP and a second configuration parameter of the second BWP.
The communication method according to any of claims 11 to 14, wherein the method further comprises:

and determining the lower limit of the target time slot offset as the lower limit of the time slot offset corresponding to the second BWP.
The method of communication according to any of claims 11 to 14, wherein prior to said receiving first indication information on a first portion of bandwidth BWP on a first time domain resource, the method further comprises:

sending second radio resource control information, wherein the second radio resource control information comprises a plurality of time slot offset lower limits and a plurality of indexes which are in one-to-one correspondence with the time slot offset lower limits;

in a case where the first indication information further includes information indicating a target index, the method further includes:

and determining a target time slot offset lower limit as a time slot offset lower limit corresponding to the target index, wherein the target index is one of the plurality of indexes.
A method of communication, comprising:

transmitting third radio resource control information indicating a lower limit of the first slot offset;

transmitting second indication information indicating scheduling information of a second data channel;

determining a target timeslot offset lower limit as a timeslot offset lower limit corresponding to a third BWP if the second indication information further indicates switching to the third BWP;

otherwise, determining the target timeslot offset lower limit as the first timeslot offset lower limit.
The communication method of claim 17, wherein the lower bound of the slot offset for the third BWP is a minimum slot offset in the list of time domain resource allocations on the third BWP.
The communications method of claim 17 or 18, wherein the third radio resource control information is further used to indicate a second lower slot offset limit, the first lower slot offset limit being smaller than the second lower slot offset limit.
A method of communication, comprising:

transmitting fourth radio resource control information, wherein the fourth radio resource control information comprises a plurality of time slot offset lower limits and a plurality of indexes which are in one-to-one correspondence with the time slot offset lower limits;

transmitting third indication information including information indicating a handover to a fourth BWP;

determining a target slot offset lower limit as a slot offset lower limit corresponding to a target index under the condition that the third indication information further includes information indicating the target index, wherein the target index is one of the plurality of indexes;

otherwise, determining the target timeslot offset lower limit as a timeslot offset lower limit corresponding to the fourth BWP.
A terminal device, comprising:

a transceiving module, configured to receive first indication information on a first partial bandwidth BWP on a first time domain resource, where the first indication information indicates switching to a second BWP and indicates receiving or transmitting a first data channel on a second time domain resource, and a frequency domain position and a bandwidth of the first BWP are the same as a frequency domain position and a bandwidth of the second BWP;

the transceiver module is further configured to receive or transmit a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts.
The terminal device of claim 21,

the transceiver module is specifically configured to receive or transmit a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after a target time and before a time slot where the second time domain resource is located starts, where the target time is located after the end of the first time domain resource and before the time slot where the second time domain resource is located starts.
The terminal device of claim 21, wherein the number of receive antennas for the first BWP is the same as the number of receive antennas for the second BWP, and/or wherein the number of MIMO transmission layers for the first BWP is the same as the number of MIMO transmission layers for the second BWP.
The terminal device according to one of claims 21 to 23, wherein before the transceiver module receives the first indication information on the first time domain resources, on the first portion of bandwidth BWP,

the transceiver module is further configured to receive first radio resource control information, where the first radio resource control information includes a target BWP configuration parameter, and the target BWP configuration parameter is used to indicate a first configuration parameter of the first BWP and a second configuration parameter of the second BWP.
The terminal device according to any of claims 21 to 24, wherein the terminal device further comprises:

and a processing module, configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the second BWP.
The terminal device according to one of claims 21 to 24, wherein before the transceiver module receives the first indication information on the first time domain resources, on the first portion of bandwidth BWP,

the transceiver module is further configured to receive second radio resource control information, where the second radio resource control information includes a plurality of slot offset lower limits and a plurality of indexes corresponding to the plurality of slot offset lower limits one to one;

the terminal device further includes:

a processing module, configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to a target index when the first indication information further includes information indicating the target index, where the target index is one of the multiple indexes.
A terminal device, comprising:

an obtaining module, configured to obtain a first slot offset lower limit indicated by the third rrc message;

a receiving module, configured to receive second indication information, where the second indication information indicates scheduling information of a second data channel;

a processing module for processing the received data,

the processing module is configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to a third BWP, if the second indication information further indicates switching to the third BWP;

otherwise, the processing module is configured to determine that the target timeslot offset lower limit is the first timeslot offset lower limit.
The terminal device of claim 27, wherein the lower bound of the slot offset for the third BWP is a minimum slot offset in a list of time domain resource allocations on the third BWP.
The terminal device according to claim 27 or 28,

the obtaining module is specifically configured to obtain the first timeslot offset lower limit and a second timeslot offset lower limit indicated by the third rrc message, where the first timeslot offset lower limit is smaller than the second timeslot offset lower limit.
A terminal device, comprising:

a receiving module, configured to receive fourth radio resource control information, where the fourth radio resource control information includes a plurality of slot offset lower limits and a plurality of indexes that are in one-to-one correspondence with the plurality of slot offset lower limits;

the receiving module is further configured to receive third indication information, where the third indication information includes information indicating a switch to a fourth BWP,

a processing module for processing the received data,

when the third indication information further includes information indicating a target index, the processing module is configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to the target index, where the target index is one of the multiple indexes;

otherwise, the processing module is configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the fourth BWP.
A network device, comprising:

a transceiving module, configured to transmit first indication information on a first partial bandwidth BWP on a first time domain resource, where the first indication information indicates switching to a second BWP and indicates receiving or transmitting a first data channel on a second time domain resource, and a frequency domain position and a bandwidth of the first BWP are the same as a frequency domain position and a bandwidth of the second BWP;

the transceiver module is further configured to receive or transmit a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after the first time domain resource ends and before a time slot where the second time domain resource is located starts.
The network device of claim 31,

the transceiver module is specifically configured to receive or transmit a target signal on a frequency domain resource corresponding to the first BWP or the second BWP on a time domain resource after a target time and before a time slot where the second time domain resource is located starts, where the target time is located after the end of the first time domain resource and before the time slot where the second time domain resource is located starts.
The network device of claim 31, wherein the number of receive antennas for the first BWP is the same as the number of receive antennas for the second BWP, and/or wherein the number of MIMO transmission layers for the first BWP is the same as the number of MIMO transmission layers for the second BWP.
The network device of any of claims 31 to 33, wherein before the transceiver module receives the first indication information on the first time domain resources, on the first portion of bandwidth BWP,

the transceiver module is further configured to transmit first radio resource control information, where the first radio resource control information includes a target BWP configuration parameter, and the target BWP configuration parameter is used to indicate a first configuration parameter of the first BWP and a second configuration parameter of the second BWP.
The network device of any one of claims 31 to 34, wherein the network device further comprises:

and a processing module, configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the second BWP.
The network device of any of claims 31 to 34, wherein before the transceiver module receives the first indication information on the first time domain resources, on the first portion of bandwidth BWP,

the transceiver module is further configured to send second radio resource control information, where the second radio resource control information includes a plurality of slot offset lower limits and a plurality of indexes corresponding to the plurality of slot offset lower limits one to one;

in a case where the first indication information further includes information indicating a target index, the network device further includes:

and the processing module is used for determining that the target time slot offset lower limit is the time slot offset lower limit corresponding to the target index, and the target index is one of the plurality of indexes.
A network device, comprising:

a sending module, configured to send third radio resource control information indicating a lower limit of the first slot offset;

the sending module is further configured to send second indication information, where the second indication information indicates scheduling information of a second data channel;

the network device further comprises a processing module that,

the processing module is configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to a third BWP, if the second indication information further indicates switching to the third BWP;

otherwise, the processing module is configured to determine that the target timeslot offset lower limit is the first timeslot offset lower limit.
The network device of claim 37, wherein the lower bound of the slot offset for the third BWP is a minimum slot offset in a list of time domain resource allocations on the third BWP.
The network device of claim 37 or 38, wherein the third radio resource control information is further to indicate a second lower slot offset limit, the first lower slot offset limit being less than the second lower slot offset limit.
A network device, comprising:

a sending module, configured to send fourth radio resource control information, where the fourth radio resource control information includes multiple slot offset lower limits and multiple indexes that are in one-to-one correspondence with the multiple slot offset lower limits;

the sending module is further configured to send third indication information, where the third indication information includes information indicating a switch to a fourth BWP,

when the third indication information further includes information indicating a target index, the processing module is configured to determine that a target timeslot offset lower limit is a timeslot offset lower limit corresponding to the target index, where the target index is one of the multiple indexes;

otherwise, the processing module is configured to determine that the target timeslot offset lower limit is a timeslot offset lower limit corresponding to the fourth BWP.
A communication apparatus, characterized in that the apparatus comprises means for performing the communication method according to any of claims 1-20.
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 communication method of any one of claims 1 to 20.
A communications apparatus, the apparatus comprising: a processor, a memory for storing a computer program, and a transceiver, the processor for executing the computer program stored in the memory to cause the apparatus to perform the communication method of any one of claims 1 to 20.
A communications apparatus, the apparatus comprising: a processor coupled with a memory for storing a computer program and a memory for executing the computer program stored in the memory to cause the communication apparatus to perform the communication method according to any one of claims 1 to 20.
A readable storage medium comprising a program or instructions which, when run on a computer, performs the communication method of any one of claims 1-20.
A computer program product comprising instructions for causing a computer to perform the communication method according to any one of claims 1 to 20 when the computer program product is run on the computer.
A chip system, comprising: a processor for calling and running a computer program from a memory so that a communication device in which the chip system is installed performs the communication method according to any one of claims 1 to 20.