CN117998641A - Communication method, device, system and storage medium - Google Patents

Abstract

A communication method, device, system and storage medium relate to the technical field of wireless communication. The terminal equipment receives first DCI sent by the network equipment, wherein the first DCI comprises first indication information for indicating the first cell to perform BWP switching or second indication information for indicating the first cell to enter dormancy or non-dormancy; the terminal equipment determines a first time period, stops monitoring or stopping receiving or discarding the second DCI which is received and used for scheduling the first cell in the first time period, or stops monitoring or stopping receiving or discarding the third DCI which is received and used for scheduling at least one cell in the first cell group in the first time period; the at least one cell includes a second cell, and the second cell and the first cell belong to a first cell group. The method can solve the problem that DCI cannot be correctly transmitted and/or received caused when the activated BWP of the regulated cell is in a fuzzy period under the condition that the regulated cell is subjected to BWP switching.

Description

Communication method, device, system and storage medium

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communications method, apparatus, system, and storage medium.

Background

NR introduces the concept of BandWidth Part (BWP). A terminal device can have only one active downlink BWP (active downlink BWP) on a downlink carrier and only one uplink active BWP (active uplink BWP) on an uplink carrier. The user equipment may have different traffic demands at different times and different transmission bandwidth demands. The base station can activate different BWPs at different moments through downlink control information (downlink control Information, DCI) according to service requirements, so as to achieve the purposes of saving power consumption of terminal equipment and the like.

In cross-carrier scheduling, active BWP on the cell being scheduled is in a ambiguity period, i.e. there is no active BWP, during the time when BWP handover occurs in the cell being scheduled. Since the size of DCI may relate to the active BWP configuration of the tuned cell, if the base station and the terminal device are aware of the size of DCI differently, normal transmission and reception of DCI cannot be performed.

In the scenario that the BWP handover occurs in the tuned cell, since the active BWP on the tuned cell is in a ambiguity period (i.e. there is no active BWP), the DCI size is ambiguous (i.e. the DCI size cannot be determined), thus resulting in the problem that the DCI cannot be correctly transmitted and/or received, no corresponding solution exists at present.

Disclosure of Invention

The embodiment of the application provides a communication method, a device, a system and a storage medium, which are used for solving the problem that DCI (downlink control information) cannot be correctly transmitted and/or received due to the size ambiguity of DCI (downlink control information) when the activated BWP of a regulated cell is in an ambiguity period under the condition that the regulated cell is subjected to BWP switching.

In a first aspect, a communication method is provided, which can be applied to a terminal device, the method comprising: receiving first Downlink Control Information (DCI) sent by a network device, where the first DCI includes first indication information for instructing a first cell to perform a bandwidth part (BWP) handover, or includes second indication information for instructing the first cell to go dormant or not dormant; determining a first time period, and stopping monitoring or stopping receiving second DCI (downlink control information) sent by the network equipment and used for scheduling the first cell in the first time period, or discarding the received second DCI, or stopping monitoring or stopping receiving third DCI sent by the network equipment and used for scheduling at least one cell in a first cell group in the first time period, or discarding the received third DCI; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

In the above implementation manner, in the scenario that the primary scheduling cell schedules one of the scheduled cells, if the network device instructs the first cell (i.e., the scheduled cell) to perform BWP handover through the first DCI, or instructs the first cell to go dormant or non-dormant, the terminal device may not receive the second DCI for scheduling the first cell in a first period of time thereafter, or discard the received second DCI, so that the problem that the second DCI cannot be determined when the active BWP in the first cell is in a ambiguity period (i.e., there is no active BWP in the scheduled cell) because BWP handover occurs (the operation that the first cell goes dormant/non-dormant is performed by BWP handover) may be avoided or reduced. In the scenario where the primary scheduling cell schedules multiple scheduled cells, if the network device instructs the first cell (i.e., the scheduled cell) to perform BWP handover through the first DCI, or instructs the first cell to go dormant or not dormant, the terminal device may not receive the third DCI for scheduling the first cell group (i.e., the scheduled cell group) or discard the received third DCI for a first period of time thereafter, so that the problem that the second cell in the scheduled cell group cannot be correctly transmitted and/or received may be avoided or reduced because the first cell in the group performs BWP handover (the operation that the first cell goes dormant/not dormant is performed through BWP handover), and the active BWP in the first cell is in a ambiguity period (i.e., the scheduled cell does not have active BWP).

Optionally, the first DCI is carried and sent on a Physical Downlink Control Channel (PDCCH) of a third cell (i.e., a primary scheduling cell), which is different from the first cell, and the third cell is the same as or different from the second cell. By the implementation mode, cross-carrier scheduling can be realized.

Optionally, the determining the first period of time includes: and determining the first time period according to the sending time of the first DCI and BWP switching delay. In this way, it may be ensured that the received second DCI or the third DCI is not received or discarded during the time when the terminal device performs the BWP switching operation, and further, the terminal device may be further enabled to receive the DCI sent by the network device as timely as possible after the BWP switching is ensured to be completed.

In one possible implementation, the starting time of the first period is: the end time of the first 3 symbols of a first time slot of a third cell where the first DCI is located, wherein the first time slot is the time slot where the first DCI is located; or the ending time of a physical downlink control channel PDCCH carrying the first DCI; or a starting time of a first time slot, wherein the first time slot is a time slot where the first DCI is located.

In some implementations described above, compared with the related art, the period of time during which no transmission is not received may be advanced, so that the situation that the DCI sizes of the terminal device and the network device are cognitively different in this period of time may be avoided.

In one possible implementation, in a case where the first DCI includes the first indication information, an end time of the first period is a start time of a slot indicated by a slot offset in a time domain resource indication domain of the first DCI; or when the first DCI includes the first indication information and the first indication information indicates that the first cell performs downlink BWP handover, the ending time of the first period is a starting time of a first downlink slot after a first time interval from the starting time of the first slot; or when the first DCI includes the first indication information and the first indication information indicates that the first cell performs uplink BWP handover, the ending time of the first period is a starting time of a first uplink slot after a first time interval from the starting time of the first slot. Wherein the first time interval is associated with a BWP switch delay.

Optionally, the first time interval is equal to T _{BWPswitchDelay} +y; wherein the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier spacing of the third cell, the subcarrier spacing of BWP before the first cell handover, and the subcarrier spacing of BWP after the first cell handover; the value of Y includes: in case the first cell and the third cell are not the same cell, the value of Y is equal to 1; or in case the first cell and the third cell are the same cell, the value of Y is equal to 0; or under the condition that the frequency points of the first cell and the third cell are in the frequency domain range FR2-2, the value of Y is determined according to the 120KHz subcarrier interval.

In some implementations, the length of the first period of time during which DCI cannot be transmitted and received may be reduced and the spectrum utilization may be improved when the terminal device capability allows.

In one possible implementation, in a case where the first DCI includes the second indication information and the second indication information indicates that downlink BWP of the first cell is dormant, the end time of the first period is a start time of a first downlink slot after a second time interval from the start time of the first slot; or when the first DCI includes the second indication information and the second indication information indicates that the uplink BWP of the first cell is dormant, the ending time of the first period is a starting time of the first uplink slot after a second time interval from the starting time of the first slot. Wherein the second time interval is related to a BWP switch delay.

Optionally, the second time interval is equal to T _{BWPswitchDelay} +x in a case where the first DCI is transmitted in the first 3 symbols in one slot of the third cell, or is equal to T _{BWPswitchDelay} +x+z in a case where the first DCI is not transmitted in the first 3 symbols in one slot of the third cell. Wherein the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier spacing of the third cell, the subcarrier spacing of the first cell dormant BWP, and the subcarrier spacing of the activated BWP before or after the first cell handover; the value of X is equal to 1, and the unit of X is a time slot, where the time slot corresponds to the minimum value of the subcarrier interval of the third cell, the subcarrier interval of the first cell dormant BWP, and the subcarrier interval of the first cell activated BWP before or after the switching; or under the condition that the frequency points of the first cell and the third cell are in a frequency domain range FR2-2, the value of X is determined according to a 120KHz subcarrier interval; the value of Z is equal to 1, and the unit of Z is a time slot, where the time slot corresponds to a subcarrier spacing of the third cell.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform uplink BWP handover, the stopping monitoring or stopping receiving, in the first period of time, the second DCI sent by the network device and used to schedule the first cell, or discarding the received second DCI includes: stopping monitoring or stopping receiving second DCI (downlink control information) sent by the network equipment and used for scheduling uplink data transmission of the first cell in the first time period, or discarding the received second DCI; or in the case that the first indication information is used for indicating the first cell to perform downlink BWP handover, stopping monitoring or stopping receiving, in the first period, the second DCI sent by the network device and used for scheduling the first cell, or discarding the received second DCI, where the method includes: and stopping monitoring or stopping receiving second DCI sent by the network equipment and used for scheduling the downlink data transmission of the first cell in the first time period, or discarding the received second DCI.

In a possible implementation manner, when the first indication information is used to indicate that the first cell performs uplink BWP handover, the stopping monitoring or stopping receiving, in the first period of time, third DCI sent by the network device and used to schedule at least one cell in the first cell group, or discarding the received third DCI includes: stopping monitoring or stopping receiving third DCI (downlink control information) sent by the network equipment and used for scheduling uplink data transmission of at least one cell in a first cell group in the first time period, or discarding the received third DCI; or when the first indication information is used for indicating the first cell to perform downlink BWP handover, the stopping monitoring or stopping receiving the third DCI sent by the network device and used for scheduling at least one cell in the first cell group in the first period, or discarding the third DCI includes: and stopping monitoring or stopping receiving third DCI which is sent by the network equipment and is used for scheduling downlink data transmission of at least one cell in the first cell group in the first time period, or discarding the third DCI.

Optionally, before receiving the first DCI sent by the network device, the method further includes: and receiving third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in a frequency division duplex mode in the first cell.

In a possible implementation manner, in a case where the first indication information is used to indicate that the first cell performs uplink BWP handover or downlink BWP handover, the stopping monitoring or stopping receiving, in the first period of time, the second DCI sent by the network device and used to schedule the first cell, or discarding the received second DCI includes: stopping monitoring or stopping receiving second DCI (downlink control information) sent by the network equipment and used for scheduling the first cell in the first time period, or discarding the received second DCI; the second DCI includes DCI for scheduling uplink data transmission of the first cell and DCI for scheduling downlink data transmission of the first cell.

In one possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform uplink BWP handover or downlink BWP handover or is used to instruct the first cell to go dormant or not dormant, the stopping monitoring or stopping receiving, in the first period of time, third DCI sent by the network device and used to schedule at least one cell in the first cell group, or discarding the received third DCI includes: and stopping monitoring or stopping receiving third DCI which is sent by the network equipment and is used for scheduling uplink data transmission of at least one cell in the first cell group in the first time period, or discarding the received third DCI.

Optionally, the method further comprises: and stopping monitoring or stopping receiving the fourth DCI which is sent by the network equipment and is used for scheduling the downlink data transmission of at least one cell in the first cell group in the first time period, or discarding the received fourth DCI.

In one possible implementation, before receiving the first DCI sent by the network device, the method further includes: and receiving fourth indication information sent by the network equipment, wherein the fourth indication information is used for indicating the terminal equipment to work in a time division duplex mode in the first cell.

In a second aspect, a communication method is provided, the method being applicable to a network device, the method comprising: transmitting first DCI to terminal equipment, wherein the first DCI comprises first indication information for indicating a first cell to perform BWP switching or comprises second indication information for indicating the first cell to go dormant or not dormant; determining a second time period, and stopping or not allowing transmission of second DCI for scheduling the first cell to the terminal equipment in the second time period, or stopping or not allowing transmission of third DCI for scheduling at least one cell in the first cell group to the terminal equipment in the second time period; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

In one possible implementation, the starting time of the second period is:

The end time of the first 3 symbols of a first time slot of a third cell where the first DCI is located, wherein the first time slot is the time slot where the first DCI is located; or the ending time of a physical downlink control channel PDCCH carrying the first DCI; or a starting time of a first time slot, wherein the first time slot is a time slot where the first DCI is located.

Optionally, the third cell is different from the first cell, and the third cell is the same as or different from the second cell.

In one possible implementation, in a case where the first DCI includes the first indication information:

The ending time of the second time period is the starting time of a time slot indicated by the time slot offset in the time domain resource indication domain of the first DCI; or when the first DCI includes the first indication information and the first indication information indicates that the first cell performs downlink BWP handover, the ending time of the second period is a starting time of the first downlink slot after a first time interval from the starting time of the first slot; or when the first DCI includes the first indication information and the first indication information indicates that the first cell performs uplink BWP handover, the ending time of the second period is a starting time of the first uplink slot after a first time interval from the starting time of the first slot. Wherein the first time interval is associated with a BWP switch delay.

Optionally, the first time interval is equal to T _{BWPswitchDelay} +y. Wherein the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier spacing of the third cell, the subcarrier spacing of BWP before the first cell handover, and the subcarrier spacing of BWP after the first cell handover; the value of Y includes: in case the first cell and the third cell are not the same cell, the value of Y is equal to 1; or in case the first cell and the third cell are the same cell, the value of Y is equal to 0; or under the condition that the frequency points of the first cell and the third cell are in the frequency domain range FR2-2, the value of Y is determined according to the 120KHz subcarrier interval.

In one possible implementation, in a case where the first DCI includes the second indication information and the second indication information indicates that the downlink BWP of the first cell is dormant, the ending time of the second period is a starting time of the first downlink slot after a second time interval from the starting time of the first slot; or when the first DCI includes the second indication information and the second indication information indicates that the uplink BWP of the first cell is dormant, the ending time of the second period is a starting time of the first uplink slot after a second time interval from the starting time of the first slot. Wherein the second time interval is related to a BWP switch delay.

Optionally, the second time interval is equal to T _{BWPswitchDelay} +x in a case where the first DCI is transmitted in the first 3 symbols in one slot of the third cell, or is equal to T _{BWPswitchDelay} +x+z in a case where the first DCI is not transmitted in the first 3 symbols in one slot of the third cell; wherein the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier spacing of the third cell, the subcarrier spacing of the first cell dormant BWP, and the subcarrier spacing of the activated BWP before or after the first cell handover; the value of X is equal to 1, and the unit of X is a time slot, where the time slot corresponds to the minimum value of the subcarrier interval of the third cell, the subcarrier interval of the first cell dormant BWP, and the subcarrier interval of the first cell activated BWP before or after the switching; or under the condition that the frequency points of the first cell and the third cell are in a frequency domain range FR2-2, the value of X is determined according to a 120KHz subcarrier interval; the value of Z is equal to 1, and the unit of Z is a time slot, where the time slot corresponds to a subcarrier spacing of the third cell.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform uplink BWP handover, the stopping or not being allowed to send, for the second period of time, second DCI for scheduling the first cell to the terminal device includes: stopping or not allowing to send second DCI for scheduling the uplink data transmission of the first cell to the terminal equipment in the second time period; or in case the first indication information is used to instruct the first cell to perform downlink BWP handover, the stopping or not being allowed to send the second DCI for scheduling the first cell to the terminal device in the second period of time includes: stopping or not allowing to send second DCI for scheduling the downlink data transmission of the first cell to the terminal equipment in the second time period.

In a possible implementation manner, in a case where the first indication information is used to indicate the first cell to perform uplink BWP handover, the stopping or not being allowed to send, in the second period of time, third DCI for scheduling at least one cell in the first cell group to the terminal device includes: stopping or not being allowed to send third DCI for scheduling uplink data transmission of at least one cell of the first cell group to the terminal device within the second period; or in case that the first indication information is used to indicate the first cell to perform downlink BWP handover, the stopping or not being allowed to send, to the terminal device, third DCI for scheduling at least one cell in the first cell group in the second period of time includes: and stopping or not allowing to send third DCI for scheduling downlink data transmission of at least one cell in the first cell group to the terminal equipment in the second time period.

In one possible implementation, before sending the first DCI to the terminal device, the method further includes:

and sending third indication information to the terminal equipment, wherein the third indication information is used for indicating the terminal equipment to work in a frequency division duplex mode in the first cell.

In a possible implementation manner, in a case where the first indication information is used to indicate that the first cell performs uplink BWP handover or downlink BWP handover, the stopping or not being allowed to send, for the second period of time, second DCI for scheduling the first cell to the terminal device includes: stopping or not being allowed to transmit a second DCI for scheduling the first cell to the terminal device for the second period of time; the second DCI includes DCI for scheduling uplink data transmission of the first cell and DCI for scheduling downlink data transmission of the first cell.

In one possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform uplink BWP handover or downlink BWP handover or is used to instruct the first cell to go dormant or not dormant, the stopping or not being allowed to send, for the second period of time, the second DCI for scheduling the first cell to the terminal device includes: and stopping or not allowing to send third DCI for scheduling at least one cell uplink data transmission in the first cell group to the terminal equipment in the second time period.

Optionally, the method further comprises: and stopping or not allowing the transmission of fourth DCI for scheduling the downlink data transmission of at least one cell in the first cell group to the terminal equipment in the second time period.

Optionally, before sending the first DCI to the terminal device, the method further includes: and sending fourth indication information to the terminal equipment, wherein the fourth indication information is used for indicating the terminal equipment to work in a time division duplex mode in the first cell.

In a third aspect, a communication method is provided, which may be used for a terminal device, the method comprising: receiving first DCI sent by network equipment, wherein the first DCI comprises first indication information for indicating a first cell to perform BWP switching or second indication information for indicating the first cell to go into dormancy or not dormancy; and determining a first time period, and stopping monitoring or stopping receiving the first DCI format sent by the network equipment in the first time period, or discarding the received first DCI format. The first DCI format can be used to schedule data transmission of two or more cells simultaneously, where the first cell belongs to a first cell group, and the first cell group is a set of all the scheduled cells that the first DCI format can schedule.

In a fourth aspect, a communication method is provided, the method being applicable to a network device, the method comprising: transmitting first DCI to terminal equipment, wherein the first DCI comprises first indication information for indicating a first cell to perform BWP switching or comprises second indication information for indicating the first cell to go dormant or not dormant; and determining a second time period, and stopping or not allowing the first DCI format to be sent to the terminal equipment in the second time period. The first DCI format can be used to schedule data transmission of two or more cells simultaneously, where the first cell belongs to a first cell group, and the first cell group is a set of all the scheduled cells that the first DCI format can schedule.

In a fifth aspect, there is provided a communication apparatus comprising: a processing unit and a transceiver unit. The transceiver unit is configured to receive first downlink control information DCI sent by the network device, where the first DCI includes first indication information for indicating the first cell to perform a BWP handover, or includes second indication information for indicating the first cell to go dormant or not dormant; the processing unit is used for determining a first time period; and stopping monitoring or stopping receiving second DCI sent by the network device and used for scheduling the first cell in the first time period, or discarding the received second DCI, or stopping monitoring or stopping receiving third DCI sent by the network device and used for scheduling at least one cell in a first cell group in the first time period, or discarding the received third DCI; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

In a sixth aspect, a communication device is provided, including a processing unit and a transceiver unit. The transceiver unit is configured to send first downlink control information DCI to the terminal device, where the first DCI includes first indication information for indicating the first cell to perform a BWP handover, or includes second indication information for indicating the first cell to go dormant or not dormant; the processing unit is used for determining a second time period; and stopping or not being allowed to transmit second DCI for scheduling the first cell to the terminal device for the second period of time, or stopping or not being allowed to transmit third DCI for scheduling at least one cell of the first cell group to the terminal device for the second period of time; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

In a seventh aspect, there is provided a communication system comprising: a terminal device for performing the method of any of the first aspects above, and a terminal device for performing the method of any of the second aspects above.

An eighth aspect provides a communication system comprising: a terminal device for performing the method of any of the third aspects above, and a terminal device for performing the method of any of the fourth aspects above.

A ninth aspect provides a communication apparatus comprising: one or more processors; wherein the instructions of the one or more computer programs, when executed by the one or more processors, cause the communications apparatus to perform the method of any of the first or third aspects above, or to perform the method of any of the second or fourth aspects above.

In a tenth aspect, there is provided a computer readable storage medium comprising a computer program which, when run on a computing device, causes the computing device to perform the method of any of the first or third aspects above, or to perform the method of any of the second and fourth aspects above.

In an eleventh aspect, a chip is provided, coupled to a memory, for reading and executing program instructions stored in the memory, to implement the method according to any one of the first or third aspects, or to implement the method according to any one of the second or fourth aspects.

In a twelfth aspect, there is provided a computer program product which, when invoked by a computer, causes the computer to perform the method of any of the first or third aspects above, or to perform the method of any of the second or fourth aspects above.

The advantages of the second aspect to the twelfth aspect are referred to as the advantages of the first aspect, and the description is not repeated.

Drawings

Fig. 1 is a schematic diagram of BWP configured in one carrier;

fig. 2a, 2b, 2c and 2d are schematic diagrams of BWP switching in the related art, respectively;

Fig. 3a and 3b are schematic diagrams of sleep handover in the related art, respectively;

fig. 4 is a schematic diagram of scheduling by a new DCI format in the related art;

Fig. 5a is a schematic diagram of a related art in which DCI cannot be normally transmitted/received due to BWP switching delay in a one-to-one cross-carrier scheduling scenario;

fig. 5b is a schematic diagram of a related art in which DCI cannot be normally transmitted/received due to BWP switching delay in a one-to-many cross-carrier scheduling scenario;

Fig. 6 is a schematic diagram of a mobile communication system according to an embodiment of the present application;

fig. 7 is a flow chart of a communication method implemented at a terminal side according to an embodiment of the present application;

Fig. 8a and 8b are schematic diagrams of a start time and an end time of a first period of time at the BWP switch according to an embodiment of the present application;

Fig. 9a and 9b are schematic diagrams of a start time and an end time of a first period of time at the time of sleep handover according to an embodiment of the present application;

Fig. 10 is a flow chart of a communication method implemented at a network device side according to an embodiment of the present application;

Fig. 11 is a schematic diagram of a time deviation between a second time period determined by a network device and a first time period determined by a terminal device in an embodiment of the present application;

fig. 12 is a schematic flow chart of interaction between a terminal device and a network device in an embodiment of the present application;

fig. 13a and fig. 13b are schematic flow diagrams of a communication method implemented at a terminal according to another embodiment of the present application;

fig. 14a and fig. 14b are schematic flow diagrams of a communication method implemented at a network side according to another embodiment of the present application;

fig. 15 is a schematic diagram of a time deviation between a second time period determined by a network device and a first time period determined by a terminal device according to another embodiment of the present application;

fig. 16, 17 and 18 are schematic structural views of a communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

It should be understood that in the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. In the text description of the present application, the character "/" generally indicates that the front-rear associated object is an or relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, and c may represent: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c. Wherein a, b and c can be single or multiple respectively. The terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion, such as a series of steps or elements. The method, system, article, or apparatus is not necessarily limited to those explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus.

The related art related to the embodiments of the present application will be described first.

Subcarrier spacing, symbols and slots.

In the New Radio (NR), a plurality of subcarrier spacings (SubCarrier Spacing, SCS) are defined. SCS corresponding to SCS serial number mu is 2 ^μ.15 kHz. For example SCS with sequence numbers mu of 0-4, corresponding to 15KHz, 30KHz,60KHz,120KHz and 240KHz respectively.

The duration of one symbol in NR is the inverse of the subcarrier spacing. Each symbol is preceded by a cyclic prefix. When the cyclic prefix is a standard cyclic prefix, one slot contains 14 symbols; when the cyclic prefix is an extended cyclic prefix, one slot contains 12 symbols.

(Two) carrier and cell.

A carrier wave (carrier) is a radio signal, i.e., electromagnetic wave, having a specific frequency, bandwidth, and format, emitted from a radio frequency device of a base station or a terminal device, and is a main body used to carry information in wireless mobile communication. The carrier used by the base station to transmit is called a downlink carrier, and the carrier used by the terminal device to transmit is called an uplink carrier.

A cell (cell) is described by a higher layer (e.g., a radio resource control layer, a medium access control layer, etc., protocol layer above a physical layer) from the point of view of resource management or mobility management. The coverage area of each network device may be divided into one or more cells. In the current NR standard, a cell may be configured with a downlink carrier, and optionally, an uplink carrier. For a terminal device, the cell that serves it is referred to as the serving cell. The cells involved in the embodiments of the present application may also be serving cells.

In order to achieve high speed transmission, there are carrier aggregation (carrier aggregation, CA) and dual connectivity (dual connectivity, DC) techniques in NR. The terminal equipment supporting CA and/or DC can simultaneously transmit data on a plurality of carriers, and the data transmission rate is improved.

Under dual link, the terminal device establishes links with a plurality of cells, which are divided into two groups: a primary cell group (MASTER CELL groups, MCG) and a secondary cell group (secondary cell group, SCG). If no dual link is made, then the set of cells in communication with the terminal device is the MCG. The primary cell in the MCG is (PRIMARY CELL, PCell), the primary cell in the SCG is a primary secondary cell (primary secondary cell, PSCell), and the other cells in the MCG and SCG are secondary cells (scells). The PCell under MCG and the SCell under MCG are joined together by carrier aggregation techniques. The PSCell under SCG and the SCell under SCG are also joined together by carrier aggregation techniques. Each carrier in CA is also referred to as a component carrier or component carrier (component carrier, CC).

And (III) BWP and switching thereof.

NR introduces the concept of BWP. A BWP is a segment of contiguous frequency resources on one carrier. There may be one or more BWP in one carrier, the bandwidth of the BWP in one carrier being less than or equal to the bandwidth of this carrier. When a BWP is configured and activated, the BWP is called an activated BWP. In the current version of the protocol, a terminal device can only have one active downlink BWP (active downlink BWP) on a downlink carrier and only one uplink active BWP (active uplink BWP) on an uplink carrier. In general, data and control information sent by a terminal device in an uplink are sent in an uplink active BWP, and data and control information sent in a downlink are received in a downlink active BWP.

By way of example, fig. 1 shows BWP configured in one carrier. As shown in fig. 1, 3 BWP, BWP1, BWP2 and BWP3 are configured in one carrier of 50MHz, respectively, wherein BWP2 is the currently active BWP.

The terminal device may have different service requirements at different times and different transmission bandwidth requirements. The base station can activate different BWPs at different moments according to service requirements so as to achieve the purposes of saving power consumption of terminal equipment and the like. NR supports BWP handover using triggering of terminal devices in DCI of scheduling data. Wherein, the DCI is carried in a physical downlink control channel (physical downlink ccontrol channel, PDCCH) of NR.

The BWP indication field is included in the DCI, and if the BWP ID indicated by the BWP indication field in one DCI is different from the ID of the current active BWP, the DCI triggers BWP handover; if the BWP indication field in one DCI indicates that the BWP ID is the same as the current active BWP ID, this DCI does not trigger BWP handover. One BWP indication field indicates that a DCI format (DCI format) for BWP switching can be transmitted only within the first 3 symbols of one slot (slot).

If the terminal device monitors a DCI format whose BWP indication field indicates an active downlink BWP handover of a cell, the terminal device need not receive or transmit on the cell from the end of the first 3 symbols of a slot of the scheduling cell in which the terminal device receives the PDCCH carrying the DCI format to the time between the start time of the slot indicated by the slot offset (slot offset) in the time domain resource indication field of the DCI format.

If the terminal device monitors a DCI format whose BWP indication field indicates an active uplink BWP handover of a cell, the terminal device does not need to receive or transmit on the cell from the end of the first 3 symbols of a slot of the scheduling cell where the terminal device receives the PDCCH carrying the DCI format to the time between the start time of the slot indicated by the slot offset in the time domain resource indication field of the DCI format.

The spectrum of NR is divided into a symmetric spectrum (symmetric spectrum) and an asymmetric spectrum (unpaired spectrum). Frequency division duplexing (frequency division duplex, FDD) is used on the symmetric spectrum and time division duplexing (time division duplex, TDD) is used in the asymmetric spectrum. In the FDD mode, the uplink BWP and the downlink BWP of one cell may be switched independently, and the number of uplink BWP and the number of downlink BWP may be the same or different. In FDD mode, uplink BWP handover and downlink BWP handover may be performed independently. In TDD mode, the uplink BWP and the downlink BWP of a cell are paired, the center frequency points of the uplink BWP and the downlink BWP in a pair of uplink BWP and downlink BWP are the same, and the bandwidths may be different. In TDD mode, the BWP is switched simultaneously uplink and downlink, i.e. from one pair of BWP to another pair of BWP. Operating in FDD mode may be replaced by operating in symmetric spectrum. Operating in TDD mode may be replaced by operating not in symmetric spectrum.

The terminal device needs to switch from one BWP to another BWP at least to:

1. receiving and analyzing BWP switching indication in DCI;

2. Switching the radio frequency device to a new BWP, including center frequency switching, sampling rate switching and other operations;

3. the BWP configuration parameters are switched to the configuration parameters of the new BWP, the configuration parameters are applied, and the normal operation is performed.

A certain processing delay is required to accomplish the above operations. This processing delay capability of the terminal device is limited in the NR standard: for DCI-based BWP handover, after receiving a BWP handover request in a downlink slot n (slot n) of a serving cell, the terminal device needs to be able to receive a physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH) on a new BWP of this serving cell for downlink active BWP handover and needs to be able to send a Physical Uplink Shared Channel (PUSCH) SHARED CHANNEL on a new BWP of this range cell for uplink active BWP on the first downlink slot or uplink slot after a time interval (T _{BWPswitchDelay} +y, in units of slots) from the start time of slot n.

Wherein if the serving cell in which the terminal device receives the BWP handover request and the serving cell in which the BWP handover is performed are the same cell, y=0; if the serving cell in which the terminal device receives the BWP handover request and the serving cell in which the BWP handover is performed are not the same cell, y=1 slot. If the scheduling cell and the cell to be scheduled are in the Frequency domain Range 2-2 (Frequency Range 2-2 ), the value of Y is determined according to SCS 120 KHz.

In case that the serving cell in which the terminal device receives the BWP handover request and the serving cell in which the BWP handover is performed are not the same cell, the value of the time interval T _{BWPswitchDelay} in T _{BWPswitchDelay} +y is determined according to the smallest SCS among the subcarrier spacing (SCS) of the scheduling cell, the SCS of the BWP before the handover of the scheduled cell, and the SCS of the BWP after the handover, table 1.

Table 1 bwp switch latency:

The cell for transmitting the control channel corresponding to the data channel is called a scheduling cell (scheduling cell), and is also called a primary scheduling cell; the cell transmitting the data channel is called a scheduled cell. The downlink carrier of a cell carries a control channel, and uplink and downlink data channel scheduling of the cell is performed, and the cell is a self-scheduling (self-scheduling) cell. This cell is both the scheduling cell and the scheduled cell. And carrying a control channel on a downlink carrier of one cell, and carrying out uplink and downlink data channel scheduling of the other cell, wherein the cell carrying the control channel is called a scheduling cell, and the cell carrying the uplink and downlink data channel is called a scheduled cell. This form of scheduling is known as cross-carrier scheduling (cross carrier scheduling, CCS). One primary scheduling cell can correspond to a plurality of scheduled cells, that is, one primary scheduling cell can send a control channel to perform data scheduling of a plurality of scheduled cells.

Examples of BWP switching in some scenarios are given below:

Example 1: as shown in fig. 2a, in the scenario of downlink self-tuning (the primary tuning cell and the tuned cell are the same), the SCS of BWP before and after handover are the same, both are 30KHz, i.e. μ=1. The Type of BWP switching delay reported by the terminal equipment is Type1, and at this time, BWP switching delay T _{BWPswitchDelay} =2slots and Y=0. After receiving the DCI format indicating the downlink BWP handover at the slot n of the primary scheduling cell, the terminal device does not receive or transmit data on this cell in the period between the end of the first 3 symbols of the slot n of the scheduling cell and the start time of the slot indicated by the slot offset in the time domain resource indication field of this DCI format (slot offset=3 in this example).

Example 2: as shown in fig. 2b, in the scenario of uplink self-tuning (the primary tuning cell and the tuned cell are the same), the SCS of BWP before and after handover are the same, both are 30KHz, i.e. μ=1. The Type of BWP switching delay reported by the terminal equipment is Type1, and at this time, BWP switching delay T _{BWPswitchDelay} =2slots and Y=0. After receiving the DCI format indicating the uplink BWP handover at the slot n of the primary scheduling cell, the terminal device does not receive or transmit data on this cell in the period between the end of the first 3 symbols of the slot n of the scheduling cell and the start time of the slot indicated by the slot offset in the time domain resource indication field of this DCI format (slot offset=3 in this example).

Example 3: as shown in fig. 2c, in the scenario of downlink cross-carrier scheduling (different between the primary and the secondary), SCS of the primary and the secondary BWP are both 30KHz, i.e. μ=1. The Type of BWP switching delay reported by the terminal equipment is Type 1, and at this time, BWP switching delay T _{BWPswitchDelay} =2slots and Y=1 slots. After receiving the DCI format indicating the cross-carrier downlink BWP handover at the slot n of the primary scheduling cell, the terminal device does not receive or transmit the DCI format on the scheduled cell in the period between the end of the first 3 symbols of the slot n of the scheduled cell and the start time of the slot (slot offset=4 in this example) indicated by the slot offset in the time domain resource indication field of the DCI format.

Example 4: as shown in fig. 2d, in the scenario of downlink cross-carrier scheduling (different between the primary and the secondary), the SCS of the primary is 30KHz, i.e. μ=1, and the SCS of BWP before and after the handover of the secondary is 60KHz, i.e. μ=2. The BWP switching delay Type reported by the terminal equipment is Type 1, and at this time, BWP switching delay T _{BWPswitchDelay} =2 slots are determined according to the smaller SCS, and in addition, Y=1 slot, where the slot is a slot corresponding to 30 KHz. After receiving the DCI format indicating the uplink cross-carrier BWP handover at the slot n of the primary scheduling cell, the terminal device does not receive or transmit the DCI format on the primary scheduling cell in the period between the end of the first 3 symbols of the slot n of the primary scheduling cell and the start time of the slot (slot offset=7 in this example) indicated by the slot offset in the time domain resource indication field of the DCI format.

(IV) carrier dormancy.

(1) Indication of carrier dormant/non-dormant.

3GPP Rel-16 introduces a dormancy (dormancy) mechanism for the SCell. Dormancy SCell will stop the uplink and downlink transmissions, but periodic measurements are also made on this cell and their measurement information is reported to the base station via other cells (PUCCH cells). The switch between Dormancy and non-dormancy (non-dormant) behaviour of the SCell is achieved by BWP switching. When a certain SCell is indicated as dormancy, then on the SCell the terminal device will switch from the currently downlink activated BWP to dormant BWP, on dormant BWP the terminal device does not need to perform PDCCH monitoring, or when the SCell is a scheduled carrier in cross-carrier scheduling, the terminal device does not need to detect a PDCCH on the corresponding scheduling carrier that schedules the SCell. The ID of the Dormant BWP is dormantBWP-Id.

Unlike the BWP indication field in DCI indicated BWP handover described above, handover between Dormancy and non-dormancy of SCell is indicated by other fields in DCI, specifically, in the following ways.

In discontinuous reception (Discontinuous reception, DRX) mode, or active period in DRX mode, there are two indication ways:

Mode one: the DCI may schedule data at the same time by indicating whether the SCell is dormancy or non-dormancy through a SCell dormancy indication (secondary carrier sleep indication) field in DCI format 0_1 or DCI format 1_1.

Mode two: the DCI may not schedule data at the same time by indicating whether the SCell is dormancy or non-dormancy through a specific field in the DCI format 1_1.

Inactive period in DRX mode, there is one way of indication:

Mode three: whether the SCell is dormancy or non-dormancy is indicated by SCell dormancy indication (secondary carrier sleep indication) field in DCI format 2_6.

In TDD mode, because the handover of the uplink and downlink BWP is bundled, the downlink BWP of one cell is handed over from the current downlink active BWP to dormant BWP while the uplink BWP is also handed over to the uplink BWP with ID dormantBWP-ID; when the downlink BWP of one cell is switched from dormant BWP to the downlink BWP with the ID of firstWithinActiveTimeBWP-Id or the downlink BWP with the ID of firstOutsideActiveTimeBWP-Id, the uplink BWP is also switched to the uplink BWP with the ID of firstWithinActiveTimeBWP-Id or the uplink BWP with the ID of firstOutsideActiveTimeBWP-Id.

In FDD mode, since the handover of the uplink and downlink BWP is independent, when the downlink BWP of one cell is handed over from the current downlink active BWP to dormant BWP, the uplink BWP is not handed over; similarly, when the downlink BWP of one cell is switched from dormant BWP to the downlink BWP with ID firstWithinActiveTimeBWP-Id or the downlink BWP with ID firstOutsideActiveTimeBWP-Id, the uplink BWP is not switched. When the SCell enters dormancy state, although the uplink BWP is not switched at this time, the transmission on the uplink BWP is stopped, including a data channel, a control channel, a Sounding REFERENCE SIGNAL (SRS), a physical random access channel ACCESS CHANNEL (PRACH), and the like.

(2) Dormancy BWP to the switching delay.

If one DCI switches dormant BWP to non dormant BWP or non dormant BWP to dormant BWP, the terminal device needs to complete the active BWP switch within the following time:

-T _{dormantBWPswitchDelay}＝T_{BWPswitchDelay} + X (in slots), if dormancy indicates that it is received in the first 3 orthogonal frequency division multiplexing (orthogonal frequency-division multiplexing, OFDM) symbols of one slot of the serving cell indicated by reception dormancy;

T _{dormantBWPswitchDelay}＝T_{BWPswitchDelay} + X + Z (in slots) if dormancy indicates that it is not received within the first 3 OFDM symbols of one slot of the serving cell indicated by reception dormancy.

The value of T _{BWPswitchDelay} is determined according to table 1 in the foregoing, where the terminal device receives the SCS of the serving cell indicated by dormancy, the SCS of dormant BWP of the serving cell in which the BWP handover occurs, and the minimum SCS of the activated BWP before or after the handover.

X=1 slot, where slot corresponds to the smallest SCS among SCS of serving cell indicated by dormancy received by the terminal device, SCS of dormant BWP of serving cell where BWP handover occurs, and SCS of activated BWP before or after handover. If the scheduling cell and the cell to be scheduled are in the Frequency domain Range 2-2 (Frequency Range 2-2 ), the value of X is determined according to SCS 120 KHz.

Z=1 slot, where slot corresponds to SCS of serving cell indicated by dormancy received by the terminal device.

If the terminal device detects a DCI format including a dormancy indication on slot n of the primary cell, which indicates downlink BWP dormancy of a secondary cell, the terminal device does not need to receive or transmit on the secondary cell in the above period T _{dormantBWPswitchDelay}.

Examples of BWP sleep handoffs in some scenarios are given below:

Example 1: as shown in fig. 3a, dormancy indicates that it was received in the first 3 OFDM symbols of one slot of the serving cell indicated by dormancy, and thus T _{dormantBWPswitchDelay}＝T_{BWPswitchDelay} +x. The SCS of the serving cell indicated by dormancy, the SCS of dormant BWP of the serving cell in which the BWP handover occurs, and the SCS of the activated BWP before or after the handover are both 30KHz, i.e. μ=1, so x=1 slot, where slot is the slot corresponding to 30 KHz. The Type of BWP switching delay reported by the terminal equipment is Type 1, and at this time, T _{BWPswitchDelay} =2 slots, so that T _{dormantBWPswitchDelay} +X=3 slots. Starting from the end time of the 3 symbols, the terminal device does not receive or transmit on the cell where the dormancy BWP handover occurred, until the end time of T _{dormantBWPswitchDelay}.

Example 2: as shown in fig. 3b, dormancy indicates that it was not received in the first 3 OFDM symbols of one slot of the serving cell indicated by reception dormancy, and therefore T _{dormantBWPswitchDelay}＝T_{BWPswitchDelay} +x+z. The SCS of the serving cell indicated by dormancy, the SCS of dormant BWP of the serving cell in which the BWP handover occurs, and the SCS of the activated BWP before or after the handover are both 30KHz, i.e. μ=1, so x=1 slot, z=1 slot, where slot is the slot corresponding to 30 KHz. The Type of BWP switching delay reported by the terminal equipment is Type 1, and at this time, T _{BWPswitchDelay} =2 slots, so that T _{dormantBWPswitchDelay} +X=4 slots. Starting from the symbol end time indicated by dormancy received, the terminal device does not receive or transmit on the cell where the dormancyBWP handover occurred, until the end time of T _{dormantBWPswitchDelay}.

And (V) downlink control information.

(1) Downlink control information format and size.

The PDCCH carries Downlink Control Information (DCI), which has a plurality of DCI formats (DCI formats). Table 2 exemplarily shows a part of DCI format and its use.

Table 2: DCI format and use thereof:

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A DCI format of DCI format 0_0/1_0/0_1/0_2/1_1/1_2 may be used to schedule data transmission on one cell and may be referred to as a single-cell scheduling DCI format.

Two new DCI formats are currently discussed in the standard, and these two DCI formats may be used to schedule data transmission of two or more cells simultaneously, and may be referred to as a multi-cell scheduling DCI format, as shown in table 3:

Table 3: novel DCI formats and uses thereof:

DCI format	Use of the same
		0_X	Scheduling PUSCH on one or more cells
1_X	Scheduling PDSCH on one or more cells

Illustratively, fig. 4 shows a schematic diagram of scheduling by the above-described new DCI format. As shown, PUSCH can be scheduled on the tuned cells 1 to 3 by DCI format 0_X, and PDSCH can be scheduled on the tuned cells 1 to 3 by DCI format 1_X.

There are two understandings of the size of the downlink control information (DCI size), the first is the size containing only information bits in the DCI, and the second is the size containing information bits in the DCI and the size of the cyclic redundancy check (Cyclic Redundancy Check, CRC). The size of the information bits in DCI is also called payload (payload) size. In the NR system, the bit width of the CRC is 24, so if the size of the information bits is the same, the size of the information bits plus the CRC bits is also the same.

The reception manner of the terminal device may be different for different DCI sizes, and in order to reduce the reception complexity of the terminal device, it is desirable that the possibility of DCI sizes is not excessive. In order to reduce the number of DCI sizes, if the DCI sizes of two DCI formats are different, DCI size alignment may be performed, and a method of adding 0 to the payload of the DCI format with a shorter DCI size until the DCI sizes are the same is generally adopted.

(2) Downlink control information content.

1. Carrier indication field:

Carrier indication fields (Carrier indicator field, CIF) are present in DCI format 0_1/0_2/1_1/1_2. When cross-carrier scheduling exists between cells and multiple scheduled cells can be scheduled, the DCI carried by the PDCCH sent on the scheduling cell may contain CIF. The higher layer signaling configures different CIF values for different tuned cells (scheduled cells). After receiving a DCI, the terminal device may determine which cell to schedule the DCI according to the CIF value.

The carrier indication field in DCI format 0_1/1_1 is 0 or 3 bits, and the configuration parameter CIF-Presence for a scheduling cell (scheduling cell) indicates whether or not the CIF field exists. The carrier indication field in DCI format 0_2/1_2 is 0,1, 2 or 3 bits, and the base station configures carrierIndicatorSizeDCI-0-2 and carrier indicator SizeDCI-1-2. These two parameters define the number of bits of the carrier indication field of DCI format 0_2/1_2.

In the two new multi-cell scheduling DCI formats (DCI format 0_X and DCI format 1_X) described above, similar to CIF field, there may be a first indication field for indicating the cell group of the current DCI schedule. For example, as shown in table 4, a design of 2 bits indicates 4 carrier combinations. When the first indication field is 0, indicating to schedule CC1; when the first indication field is 1, indicating to schedule CC2 and CC3; when the first indication domain is 2, indicating to schedule CC0 and CC2; and when the first indication field is 3, indicating to schedule CC0, CC1, CC2 and CC3.

Table 4: carrier combination corresponding to the value of the first indication field:

First indication field	CC(s)
		0(00)	1
1(01)	2,3
		2(10)	0,2
3(11)	0,1,2,3

A DCI with one DCI format being a multi-cell scheduling DCI format may schedule data transmissions on multiple cells, but not every DCI with one DCI format being a multi-cell scheduling DCI format schedules data transmissions on multiple cells simultaneously. The multiple cells of a value indication of a first indication field of a multi-cell scheduling DCI format form a group of cells, the number of cells in each group of cells in the group of cells being greater than or equal to 1, and the number of cells in at least one group of cells being greater than or equal to 2. As shown in table 4, when the two-bit value of the first indication field is 01, the DCI may schedule two cells, i.e., CC2 and CC3, and when the two-bit value of the first indication field is 00, the DCI may schedule one cell, i.e., CC1.

All cells that can be scheduled by a multi-cell scheduling DCI format constitute a cell group, and the number of cells in the cell group is greater than or equal to 2. For example, for the multi-cell scheduling DCI format in this example shown in table 3, this scheduling cell group corresponding thereto includes CC0, CC1, CC2 and CC3.

Other designs of the first indication field are possible. For example, the first indication field is used to indicate both the group of cells to be transferred and the BWP ID. The first indication field may have a plurality of different values corresponding to the same group of cells to be tuned.

2. Domain related to active BWP configuration of the tuned cell:

In DCI, there are some fields related to the active BWP configuration of the tuned cell. In particular, some fields in DCI for scheduling uplink transmissions may be related to configuration for activating uplink BWP, and some fields in DCI for scheduling downlink transmissions may be related to configuration for activating downlink BWP, for example:

Frequency domain resource indication (Frequency domain resource assignment) domain: the size and content of this field in the DCI for scheduling uplink transmissions is related to the configuration (bandwidth and center frequency offset) of the uplink active BWP of the cell being tuned; the size and content of this field in the DCI for scheduling downlink transmissions is related to the configuration (bandwidth and center frequency offset) of the downlink-activated BWP of the cell being tuned.

3. Domains in DCI formats 0_X and 1_X:

For DCI formats 1_X/0_X that can schedule multiple cells, when a cell that can be scheduled by one DCI format 0_X or 1_X contains a first cell, the bit width of some DCI domains may be related to the active BWP configuration of the first cell. Wherein, the DCI format 1_X is related to the downlink target BWP configuration of the first cell, and the DCI format 0_X is configured with a segment with the uplink target BWP of the first cell, which may include: each cell in the co-scheduling cell is separately indicated by means of a joint indication, which may be a DCI domain indicating information only to the first cell or a DCI domain indicating information to a cell group containing the first cell, where the cell group is a subset of cells that can be scheduled by a DCI format 0_X or 1_X.

Specifically, it may include:

-a new data indicator (New data indicator per TB) per Transport Block (TB);

-a redundancy version (Redundancy version per TB) per TB;

-precoding information and number of layers (Precoding information and number of layers); wherein, DCI format 0_X determines the bit width according to txConfig configuration in the uplink target BWP of the first cell;

-phase tracking reference signal-demodulation reference signal association (PTRS-DMRS association); wherein, for DCI format 0_X, if PTRS-UplinkConfig is not configured in the uplink target BWP of the first cell, this field is 0bit; otherwise, this field is 2 bits;

-Antenna port (s));

-a sounding reference signal indication (SRI);

-a physical resource block bundle size indication (PRB bundling size indicator); for DCI format 1_X, if the configuration of prb-BundlingType in the downlink target BWP of the first cell determines the bit width.

(3) And monitoring downlink control information.

The terminal device monitoring a DCI format means that the terminal device tries to perform blind detection on a control channel on a time-frequency resource corresponding to a control channel candidate, and performs decoding and CRC check according to the number of information bits (or DCI size) of the DCI format. If the verification is successful, a DCI format is considered to be successfully received on the control channel candidate; if the check fails, it is deemed that no control channel is detected on the control channel. That is, when monitoring one DCI format, the terminal needs to know the DCI size of the DCI format.

In cross-carrier scheduling, active BWP on the cell being scheduled is in a ambiguity period, i.e. there is no active BWP, during the time when BWP handover occurs in the cell being scheduled. Since the DCI size is related to the active BWP configuration of the tuned cell, the base station and the terminal device are aware of the DCI size, if they are different, that the DCI cannot be normally transmitted and received.

Specifically, there are two problem scenarios:

Problem scenario one: in one-to-one cross-carrier scheduling, i.e. cross-carrier scheduling in which one primary scheduling cell corresponds to one tuned cell, if the primary scheduling cell indicates BWP handover by the tuned cell with the BWP indication field in the DCI, active BWP on the tuned cell is in a ambiguity phase, i.e. no active BWP is present due to the BWP handover delay. If the DCI is sent on the primary scheduling cell to schedule the cell to be scheduled, the base station and the terminal equipment may have different knowledge of the DCI size, so that normal DCI transmission and/or DCI reception cannot be performed.

For example, as shown in fig. 5a, the base station transmits DCI1 on the primary scheduling cell, for indicating a handover from the current downlink BWP of the primary scheduling cell to the target downlink BWP of the tuned cell, and indicating PDSCH time-frequency resources in the target downlink BWP of the tuned cell. Due to the BWP handover delay, the target BWP of the tuned cell has not been activated during the BWP handover delay related time period, i.e. the target BWP on the tuned cell is in the ambiguity period.

One possible scenario is: if the base station wants to send DCI2 to schedule PDSCH of the scheduled cell in this period, since there is no active BWP on the currently scheduled cell, the base station cannot determine the size and content of the frequency domain resource indication field according to the configuration (such as bandwidth and center frequency offset) of the active BWP on the scheduled cell, and thus cannot determine the size of DCI2, and thus the base station cannot normally send DCI2.

Another possible case is: during this time, the base station transmits DCI2 to schedule PDSCH of the scheduled cell, and since there is no active BWP on the currently scheduled cell, the terminal device cannot determine the size and content of the frequency domain resource indication domain according to the configuration (such as bandwidth and center frequency offset) of the active BWP on the scheduled cell, and thus cannot determine the DCI size, and thus the terminal device cannot normally receive the DCI2.

Problem scenario two: in one-to-many cross-carrier scheduling, i.e. cross-carrier scheduling in which one primary scheduling cell corresponds to a plurality of scheduled cells (e.g. using DCI formats 0_X or 1_X), if the primary scheduling cell indicates that one of the scheduled cells is performing BWP handover with the BWP indication field, or the primary scheduling cell indicates that one of the scheduled cells is performing dormant BWP handover with dormancy, due to the BWP handover delay, the active BWP on the scheduled cell is in a ambiguity period, i.e. there is no active BWP. At this time, not only the home cell schedules the tuned cell with the DCI ambiguity problem, but also the home cell schedules other tuned cells with the DCI ambiguity problem because the DCI size of the DCI format 0_X or 1_X may be affected by the active BWP of the tuned cell.

For example, as shown in fig. 5b, the base station transmits DCI1 (DCI format 0_X) on the primary cell, for indicating a switch from the current downlink BWP of the primary cell to the target downlink BWP of the secondary cell 1, and indicating PDSCH time-frequency resources in the target downlink BWP of the secondary cell 1. Due to the BWP handover delay, the target BWP of the tuned cell 1 has not been activated during the BWP handover delay related time period, i.e. the target BWP on the tuned cell 1 is in the ambiguity period.

One possible scenario is: if the base station wants to transmit DCI2 to schedule PDSCH of the scheduled cell in this period, since there is no active BWP on the currently scheduled cell 1, the base station cannot determine the size and content of the frequency domain resource indication field according to the configuration (such as bandwidth and center frequency offset) of the active BWP on the scheduled cell 1, and thus cannot determine the size of DCI2, and thus the base station cannot normally transmit the DCI2.

Another possible case is: during this time, the base station transmits DCI2 (DCI format 0_X) to schedule the PDSCH of the tuned cell, and since there is no active BWP on the currently tuned cell 1, the terminal device cannot determine the size and content of the frequency domain resource indication domain according to the configuration (such as bandwidth and center frequency offset) of the active BWP on the tuned cell, and thus cannot determine the DCI size, and thus the terminal device cannot normally receive the DCI2.

It follows that in performing cross-carrier scheduling, DCI cannot be correctly transmitted and/or received due to DCI size ambiguity when the activated BWP is in the ambiguity period because BWP handover occurs in the cell being scheduled.

Based on the above, the embodiment of the application provides a communication method and a related device. With the embodiment of the present application, in a cross-carrier scheduling scenario, when a tuned cell is in a ambiguity period due to BWP switching, a network device may stop or not be allowed to transmit DCI, and a terminal device may stop receiving DCI, so that the problem that when a tuned cell is in an ambiguity period due to BWP switching (i.e., the active BWP in the tuned cell does not exist), the DCI size may not be determined, which results in that the DCI cannot be correctly transmitted and/or received may be solved.

In the embodiment of the present application, if not specifically described, DCI and DCI formats may be replaced with each other.

Embodiments of the present application are described below with reference to the accompanying drawings.

Referring to fig. 6, a schematic architecture of a mobile communication system to which an embodiment of the present application is applied is shown. The mobile communication system comprises a core network device 110, a radio access network device 120 and at least one terminal device, such as terminal device 130 and terminal device 140 in the figure. The terminal equipment is connected with the wireless access network equipment in a wireless mode, and the wireless access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the radio access network device may be separate physical devices, or may integrate the functions of the core network device and the logic functions of the radio access network device on the same physical device, or may integrate the functions of part of the core network device and part of the radio access network device on one physical device. The terminal device may be fixed in position or may be movable. Fig. 6 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 6. The embodiment of the application does not limit the number of the core network equipment, the wireless access network equipment and the terminal equipment included in the mobile communication system.

The wireless access network device is access device that the terminal device accesses to the mobile communication system in a wireless manner, and may be a base station NodeB, an evolved base station eNodeB, a base station in an NR mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc., and the specific technology and the specific device configuration adopted by the wireless access network device are not limited in the embodiments of the present application.

The Terminal device may also be referred to as a Terminal, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc. The terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented Reality (Augmented Reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (SELF DRIVING), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (SMART GRID), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (SMART CITY), a wireless terminal in smart home (smart home), etc.

The radio access network device and the terminal device may be deployed on land, including indoor or outdoor, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aerial planes, balloons and satellites. The embodiment of the application does not limit the application scenes of the wireless access network equipment and the terminal equipment.

The embodiment of the application can be suitable for downlink signal transmission, uplink signal transmission and device-to-device (D2D) signal transmission. For downlink signal transmission, the transmitting device is a radio access network device, and the corresponding receiving device is a terminal device. For uplink signal transmission, the transmitting device is a terminal device, and the corresponding receiving device is a radio access network device. For D2D signal transmission, the transmitting device is a terminal device and the corresponding receiving device is a terminal device. The transmission direction of the signal according to the embodiment of the application is not limited.

Communication between the radio access network device and the terminal device and between the terminal device and the terminal device can be performed through a licensed spectrum (licensed spectrum), communication can be performed through an unlicensed spectrum (unlicensed spectrum), and communication can be performed through both the licensed spectrum and the unlicensed spectrum. The radio access network device and the terminal device can communicate with each other through a frequency spectrum of 6G or less, can communicate through a frequency spectrum of 6G or more, and can communicate by using the frequency spectrum of 6G or less and the frequency spectrum of 6G or more simultaneously. The embodiment of the application does not limit the spectrum resources used between the wireless access network equipment and the terminal equipment.

Based on the system architecture shown in fig. 6, fig. 7 shows a flow chart of a communication method implemented at a terminal device side according to an embodiment of the present application. This flow may be applied to a procedure in which a primary scheduling cell (referred to as a third cell in this embodiment) schedules a scheduled cell (referred to as a first cell in this embodiment), for example, the flow shown in fig. 7 may be applied to a one-to-one cross-carrier scheduling scenario. As shown, the process may include the steps of:

S701: the terminal equipment receives first DCI sent by the network equipment, wherein the first DCI comprises first indication information for indicating the first cell to perform BWP switching or comprises second indication information for indicating the first cell to go dormant or not dormant.

It will be appreciated that the indication of the first cell to go dormant (dormancy) or non-dormant (non-dormancy) may also be expressed as an indication of the first cell to go dormant or to exit dormant, or as an indication of the first cell to make a dormant BWP (dormancy BWP) handoff, or as an indication of the downlink active BWP of the first cell to switch from non-dormant BWP to dormant BWP, or from dormant BWP to non-dormant BWP.

In a possible implementation manner, the first DCI for scheduling the first cell to perform the BWP handover may be DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 1_0, DCI format 1_1, or DCI format 1_2, which is not limited in this embodiment of the present application.

In a possible implementation manner, the first DCI for scheduling the first cell to go dormant or not dormant may be DCI format 0_1, DCI format 1_1, or DCI format 2_6, which is not limited in this embodiment of the present application.

In a possible implementation manner, the first indication information is carried in a BWP indication field in the first DCI, that is, the BWP indication field indicates the first cell to perform BWP handover.

In another possible implementation manner, the second indication information is carried in another indication field other than the BWP indication field in the first DCI, that is, the first cell is instructed to go dormant or not dormant by the other indication field. For example, in the DRX mode or the active period in the DRX mode, whether the SCell is dormancy or non-dormancy may be indicated by a SCell dormancy indication (secondary carrier sleep indication) field in DCI format 0_1 or DCI format 1_1, and whether the SCell is dormancy or non-dormancy may be indicated by a specific field in DCI format 1_1. For another example, the inactive period in the DRX mode may indicate whether the SCell is dormancy or non-dormancy through SCell dormancy indication (secondary carrier sleep indication) field in DCI format 2_6.

Optionally, the first DCI is sent on a PDCCH of a third cell (i.e. a primary scheduling cell), which is different from the first cell, and by this implementation, cross-carrier scheduling may be implemented.

Alternatively, the first DCI may be transmitted in the first 3 symbols of one slot or may not be transmitted in the first 3 symbols of one slot.

S702: the terminal device determines a first time period.

Alternatively, the terminal device may determine the start time and the end time of the first period according to the transmission/reception time of the first DCI and the BWP switch delay. This may ensure that the second DCI transmitted by the network device for scheduling the first cell is not received or is discarded during the time when the terminal device performs the BWP handover operation. Further, after the first period of time, that is, after the terminal device BWP is guaranteed to be switched, the terminal device may receive the DCI sent by the network device as timely as possible.

In a possible implementation, the start time of the first period of time may be one of the following start times:

First start time: the end time of the first 3 symbols of the first slot of the third cell in which the first DCI is located (i.e., the slot in which the first DCI is located). This method of determining the start time of the first time period may be applicable to the case where the first DCI is transmitted in the first 3 symbols of one slot.

Second start time: end time of PDCCH carrying first DCI. This method of determining the start time of the first time period may be applicable to a case where the first DCI is transmitted in the first 3 symbols of one slot, or may be applicable to a case where the first DCI is not transmitted in the first 3 symbols of one slot.

Third start time: the start time of the first slot (i.e., the slot in which the first DCI is located). This method of determining the start time of the first time period may be applicable to a case where the first DCI is transmitted in the first 3 symbols of one slot, or may be applicable to a case where the first DCI is not transmitted in the first 3 symbols of one slot.

In a possible implementation manner, in a case where the first DCI includes the first indication information, that is, in a case where the first DCI indicates that the first cell performs the BWP handover, the end time of the first period may be one of the following end times:

first end time: the time domain resource of the first DCI indicates a start time of a slot indicated by a slot offset (slot offset) in the domain.

Second end time: when the first indication information indicates that the first cell performs downlink BWP handover, the end time of the first period is a start time of a first downlink slot after the first time interval, starting from a start time of the first slot (i.e., a slot in which the first DCI is located).

Third end time: when the first indication information indicates that the first cell performs uplink BWP handover, the end time of the first period is a start time of a first uplink slot after the first time interval, starting from a start time of the first slot (i.e., a slot in which the first DCI is located).

Optionally, the first time interval is related to a BWP switch delay. In a possible implementation manner, the first time interval is equal to T _{BWPswitchDelay} +y, the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier interval of the third cell (i.e. the primary tuning cell), the subcarrier interval of the BWP before the first cell (i.e. the tuned cell) is handed over, and the subcarrier interval of the BWP after the first cell is handed over, and specific determination methods of the value of T _{BWPswitchDelay} and the value of Y can be seen from the foregoing relevant contents. The value of Y is equal to 1 in the case where the first cell and the third cell are not the same cell, and is equal to 0 in the case where the first cell and the third cell are the same cell. Or under the condition that the frequency points of the first cell and the third cell are in the frequency domain range FR2-2, the value of Y is determined according to the 120KHz subcarrier spacing.

In the case where the first DCI indicates the first cell to perform BWP handover and the slot offset indicated by the first DCI is slot offset=4, several examples of the first period are described below with reference to fig. 8a and 8b based on the above several possible start times and the above several possible end times of the first period. These examples are described taking the scenario in which the sub-carrier spacing of the primary and secondary cells is the same, i.e. the time slots of the primary and secondary cells are aligned.

Example 1: the starting time of the first time period is the first starting time, and the ending time is the first ending time.

Specifically, as shown in fig. 8 a:

the starting time of the first time period is: the end time of the first 3 symbols of slot n of the primary tuning cell where the first DCI is located;

The end time of the first time period is: the time domain resource of the first DCI indicates a start time of slot n+4 indicated by slot offset=4 in the domain.

The above example 1 defines the period of time in which the first cell defined in the present protocol cannot transmit and cannot receive as the first period of time, and is simple in implementation.

Example 2: the start time of the first period is the first start time, and the end time is the second end time (in case the first DCI indicates the first cell to perform the downlink BWP handover) or the third end time (in case the first DCI indicates the first cell to perform the uplink BWP handover).

Specifically, as shown in fig. 8 a:

The starting time of the first time period is: the end time of the first 3 symbols of slot n of the third cell where the first DCI is located;

In the case that the first DCI indicates that the first cell performs the uplink BWP handover, the end time of the first period is: starting from the start time of slot n where the first DCI is located, where the time interval T _{BWPswitchDelay} +y=3 slots is the start time of the first uplink slot (in the figure, it is assumed that the first slot after the time interval T _{BWPswitchDelay} +y is an uplink slot);

In the case that the first DCI indicates that the first cell performs downlink BWP handover, the end time of the first period is: starting from the start time of slot n where the first DCI is located, the time interval T _{BWPswitchDelay} +y=3 slots is the start time of the first downlink slot (in the figure, it is assumed that the first slot after the time interval T _{BWPswitchDelay} +y is a downlink slot).

In example 2, compared to example 1, the length of the first period in which DCI cannot be transmitted and received can be reduced and the spectrum utilization can be improved when the terminal device capability allows.

Example 3: the starting time of the first time period is the second starting time, and the ending time is the first ending time.

Specifically, as shown in fig. 8a and 8 b:

the starting time of the first time period is: an end time of a PDCCH carrying the first DCI;

The end time of the first time period is: the time domain resource of the first DCI indicates a start time of slot n+4 indicated by slot offset=4 in the domain.

Example 3 may advance the first period of time compared to example 1, and thus may avoid situations where the DCI size awareness of the terminal device and the network device is different during this period of time.

Example 4: the start time of the first period is the second start time, and the end time is the second end time (in case the first DCI indicates the first cell to perform the downlink BWP handover) or the third end time (in case the first DCI indicates the first cell to perform the uplink BWP handover).

Specifically, as shown in fig. 8a and 8 b:

the starting time of the first time period is: an end time of a PDCCH carrying the first DCI;

In the case that the first DCI indicates that the first cell performs the uplink BWP handover, the end time of the first period is: starting from the start time of slot n where the first DCI is located, where the time interval T _{BWPswitchDelay} +y=3 slots is the start time of the first uplink slot (in the figure, it is assumed that the first slot after the time interval T _{BWPswitchDelay} +y is an uplink slot);

In the case that the first DCI indicates that the first cell performs downlink BWP handover, the end time of the first period is: starting from the start time of slot n where the first DCI is located, the time interval T _{BWPswitchDelay} +y=3 slots is the start time of the first downlink slot (in the figure, it is assumed that the first slot after the time interval T _{BWPswitchDelay} +y is a downlink slot).

Example 5: the starting time of the first time period is the third starting time, and the ending time is the first ending time.

Specifically, as shown in fig. 8a and 8 b:

the starting time of the first time period is: the start time of slot n where the first DCI is located;

The end time of the first time period is: the time domain resource of the first DCI indicates a start time of slot 4 indicated by slot offset=4 in the domain.

Example 5 may advance the first period of time compared to example 3, avoiding situations where the DCI size awareness of the network device and the terminal device is different during the period of time.

Example 6: the start time of the first period is the third start time, and the end time is the second end time (in case the first DCI indicates the first cell to perform the downlink BWP handover) or the third end time (in case the first DCI indicates the first cell to perform the uplink BWP handover).

Specifically, as shown in fig. 8a and 8 b:

the starting time of the first time period is: the start time of slot n where the first DCI is located;

In the case that the first DCI indicates that the first cell performs the uplink BWP handover, the end time of the first period is: starting from the start time of slot n where the first DCI is located, where the time interval T _{BWPswitchDelay} +y=3 slots is the start time of the first uplink slot (in the figure, it is assumed that the first slot after the time interval T _{BWPswitchDelay} +y is an uplink slot);

In the case that the first DCI indicates that the first cell performs downlink BWP handover, the end time of the first period is: starting from the start time of slot n where the first DCI is located, the time interval T _{BWPswitchDelay} +y=3 slots is the start time of the first downlink slot (in the figure, it is assumed that the first slot after the time interval T _{BWPswitchDelay} +y is a downlink slot).

In a possible implementation manner, in a case where the first DCI includes the second indication information, that is, in a case where the first DCI indicates that the first cell performs BWP dormancy or non-dormancy, the start time of the first period may be one of the first start time, the second start time, and the third start time, and the end time of the first period may be one of the following end times:

Fourth end time: in case that the second indication information indicates that the downlink BWP of the first cell is dormant, the end time of the first period is a start time of the first downlink slot after the second time interval, starting from a start time of the first slot (i.e., a slot in which the first DCI is located).

Fifth end time: in the case that the second indication information indicates that the uplink BWP of the first cell is dormant, the end time of the first period is a start time of the first uplink slot after the second time interval, starting from a start time of the first slot (i.e., a slot in which the first DCI is located).

Optionally, the second time interval is related to a BWP switch delay. In a possible implementation, the second time interval is equal to T _{BWPswitchDelay} + X in case the first DCI is transmitted in the first 3 symbols in one slot of the third cell (the home cell) and is equal to T _{BWPswitchDelay} + X + Z in case the first DCI is not transmitted in the first 3 symbols in one slot of the third cell (the home cell).

Wherein the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier spacing of the third cell (primary cell), the subcarrier spacing of the first cell (secondary cell) dormant BWP, and the subcarrier spacing of the activated BWP before or after the first cell handover. Specific methods for determining the value of T _{BWPswitchDelay} can be found in the foregoing. The value of X is equal to 1, and the unit of X is a time slot, and the time slot corresponds to the minimum value of the subcarrier spacing of the third cell, the subcarrier spacing of the first cell dormant BWP, and the subcarrier spacing of the activated BWP before or after the first cell handover; or under the condition that the frequency points of the first cell and the third cell are in the frequency domain range FR2-2, the value of X is determined according to the 120KHz subcarrier spacing. The value of Z is equal to 1, and the unit of Z is a slot corresponding to the subcarrier spacing of the third cell.

In case the first DCI indicates that the first cell goes into BWP sleep or non-sleep and the slot offset indicated by the first DCI is slot offset=3, several examples of the first time period are described below in connection with fig. 9a and 9b based on the above several possible start times and the above several possible end times of the first time period.

Example 7: in the case where the first DCI is transmitted in the first 3 symbols of one slot, the first period has the first start time, and the end time is the fourth end time (in the case where the first DCI indicates that the first cell performs downlink BWP dormancy) or the fifth end time (in the case where the first DCI indicates that the first cell performs uplink BWP dormancy).

Specifically, as shown in fig. 9 a:

the starting time of the first time period is: the end time of the first 3 symbols of slot n of the primary tuning cell where the first DCI is located;

In the case that the first DCI indicates that the first cell performs uplink BWP dormancy, the end time of the first period is: starting from the start time of slot n, the start time of the first downlink slot after the second time interval T _{dormantBWPswitchDelay} =4 slots (in the figure, it is assumed that the first slot after the time interval T _{dormantBWPswitchDelay} is an uplink slot);

in the case that the first DCI indicates that the first cell performs downlink BWP dormancy, the end time of the first period is: starting from the start time of slot n, the start time of the first downlink slot after the second time interval T _{dormantBWPswitchDelay} (in the figure, it is assumed that the first slot after the time interval T _{dormantBWPswitchDelay} is a downlink slot).

Example 8: in the case where the first DCI is transmitted in the first 3 symbols of one slot, the first period has the second start time, and the end time is the fourth end time (in the case where the first DCI indicates that the first cell performs downlink BWP dormancy) or the fifth end time (in the case where the first DCI indicates that the first cell performs uplink BWP dormancy).

Specifically, as shown in fig. 9 a:

the starting time of the first time period is: an end time of a PDCCH carrying the first DCI;

In the case that the first DCI indicates that the first cell performs uplink BWP dormancy, the end time of the first period is: starting from the start time of slot n where the first DCI is located, the start time of the first downlink slot after the second time interval T _{dormantBWPswitchDelay} =4 slots (in the figure, it is assumed that the first slot after the time interval T _{dormantBWPswitchDelay} is an uplink slot);

In the case that the first DCI indicates that the first cell performs downlink BWP dormancy, the end time of the first period is: starting from the start time of slot n where the first DCI is located, the start time of the first downlink slot after the second time interval T _{dormantBWPswitchDelay} =4 slots (in the figure, it is assumed that the first slot after the time interval T _{dormantBWPswitchDelay} is a downlink slot).

Example 9: in the case where the first DCI is transmitted in the first 3 symbols of one slot, the start time of the first period is the third start time, and the end time is the fourth end time (in the case where the first DCI indicates that the first cell performs downlink BWP dormancy) or the fifth end time (in the case where the first DCI indicates that the first cell performs uplink BWP dormancy).

Specifically, as shown in fig. 9 a:

the starting time of the first time period is the starting time of slot n where the first DCI is located;

In the case that the first DCI indicates that the first cell performs uplink BWP dormancy, the end time of the first period is: starting from the start time of slot n where the first DCI is located, the start time of the first downlink slot after the second time interval T _{dormantBWPswitchDelay} =4 slots (in the figure, it is assumed that the first slot after the time interval T _{dormantBWPswitchDelay} is an uplink slot);

In the case that the first DCI indicates that the first cell performs downlink BWP dormancy, the end time of the first period is: starting from the start time of slot n where the first DCI is located, the start time of the first downlink slot after the second time interval T _{dormantBWPswitchDelay} =4 slots (in the figure, it is assumed that the first slot after the time interval T _{dormantBWPswitchDelay} is a downlink slot).

Example 10 shows a start time and an end time of a first period of time in case the first DCI is not transmitted in the first 3 symbols of one slot, as shown in fig. 9 b. The method of determining the start time and the end time of the first period is similar to example 8, except that the values of the time interval second time interval T _{dormantBWPswitchDelay} are different, and in the case that the first DCI is not transmitted in the first 3 symbols of one slot, the second time interval T _{dormantBWPswitchDelay} =5 slots.

Example 11 shows a start time and an end time of a first period of time in case the first DCI is not transmitted in the first 3 symbols of one slot, as shown in fig. 9 b. The method of determining the start time and the end time of the first period is similar to example 9, except that the values of the time interval second time interval T _{dormantBWPswitchDelay} are different, and in the case that the first DCI is not transmitted in the first 3 symbols of one slot, the second time interval T _{dormantBWPswitchDelay} =5 slots.

S703: the terminal device stops monitoring or stopping receiving the second DCI for scheduling the first cell sent by the network device in the first time period, or discards the received second DCI for scheduling the first cell.

In a possible implementation manner, the second DCI for scheduling the first cell may be DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 1_0, DCI format 1_1, or DCI format 1_2, which is not limited in this embodiment of the present application.

In the FDD mode, the uplink BWP handover and the downlink BWP handover are independently performed. That is, in the FDD mode, if DCI scheduling downlink data transmission (e.g., DCI format 1_1/1_2/1_X) is not aligned with DCI scheduling uplink data transmission, only transmission and reception of uplink data scheduling DCI may be limited in the uplink BWP handover process; similarly, if DCI (e.g., DCI format 0_1/0_2/0_X) for scheduling uplink data transmission is not aligned with DCI for scheduling downlink data transmission, transmission and reception of downlink data scheduling DCI may be limited only during downlink BWP handover.

In a possible implementation manner, in a case where the first indication information in the first DCI indicates that the first cell performs uplink BWP handover, the terminal device may stop monitoring or stop receiving the second DCI for scheduling uplink data transmission of the first cell in the first period of time, or discard the received second DCI for scheduling uplink data transmission of the first cell. Or under the condition that the first indication information in the first DCI indicates the first cell to perform downlink BWP handover, the terminal device may stop monitoring or stop receiving the second DCI for scheduling uplink data transmission of the first cell in the first period of time, or discard the received second DCI for scheduling downlink data transmission of the first cell. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in the FDD mode in the first cell. In the implementation manner for the FDD mode, considering that in the FDD mode, the uplink BWP switch and the downlink BWP switch may not affect the size of the DCI, the sending timing of the DCI may be increased as much as possible, so as to improve the spectrum utilization efficiency.

In a possible implementation manner, in a case where the first indication information in the first DCI indicates that the first cell performs uplink BWP handover or downlink BWP handover, the terminal device may stop monitoring or stop receiving the second DCI for scheduling downlink data transmission of the first cell in the first period, or discard the received second DCI for scheduling data transmission of the first cell. The second DCI comprises DCI for scheduling downlink data transmission of the first cell and DCI for scheduling uplink data transmission of the first cell. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives fourth indication information sent by the network equipment, wherein the fourth indication information is used for indicating the terminal equipment to work in a TDD mode in the first cell.

Based on the system architecture shown in fig. 6, fig. 10 shows a flow chart of a communication method implemented at a network device side according to an embodiment of the present application. This flow may be applied to a procedure in which a primary scheduling cell (referred to as a third cell in this embodiment) schedules a scheduled cell (referred to as a first cell in this embodiment), for example, the flow shown in fig. 7 may be applied to a one-to-one cross-carrier scheduling scenario. As shown, the process may include the steps of:

S1001: the network device transmits first DCI to the terminal device, where the first DCI includes first indication information for instructing the first cell to perform BWP handover or includes second indication information for instructing the first cell to go dormant or non-dormant.

The description of the first DCI may refer to the relevant content in the flow shown in fig. 7, and will not be repeated here.

S1002: the network device determines a second time period.

The method for determining the second time period by the network device is the same as the method for determining the first time period by the terminal device, and the related method can be referred to as related content in the flow shown in fig. 7. For example, in a scenario where the first DCI is used to indicate that BWP handover is performed, the start time of the second time period determined by the network device and the start time of the first time period determined by the terminal device are the end times of the first 3 symbols of slot n of the primary cell where the first DCI is located, where the end time is the start time of the first downlink slot after the time interval T _{BWPswitchDelay} +y from the start time of the slot where the first DCI is located.

Since there is a delay in spatial transmission, the second time period is determined based on the timing of the network device, and the first time period is determined based on the timing of the terminal device, there may be a deviation in absolute time between the second time period and the first time period. The starting time of the first time period and the second time period is as follows: the end time of the first 3 symbols of slot n of the primary tuning cell where the first DCI is located, and the end time of the first time period and the second time period are: starting from the start time of the slot where the first DCI is located, the start time of the first downlink slot after the time interval T _{BWPswitchDelay} +y=3 slots is exemplified, and fig. 11 shows a time deviation between the second time period determined by the network device and the first time period determined by the terminal device. As shown in the figure, due to the existence of the air interface time delay, a time deviation exists between the second time period determined by the network equipment and the first time period determined by the terminal equipment.

S1003: the network device stops or is not allowed to transmit the second DCI for scheduling the first cell to the terminal device for a second period of time.

The description of the second DCI may refer to the relevant content in the flow shown in fig. 7, and will not be repeated here.

In a possible implementation manner, before the network device sends the first DCI to the terminal device, the method may further include the following steps: the network device sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to operate in the FDD mode in the first cell.

In a possible implementation manner, in a scenario that the primary scheduling cell schedules a scheduled cell, the network device may stop or not be allowed to send, to the terminal device, the second DCI for scheduling uplink data transmission of the first cell in a second period of time, where the first indication information in the first DCI indicates that the first cell performs uplink BWP handover.

In a possible implementation manner, in a scenario that the primary scheduling cell schedules a scheduled cell, the network device may stop or not be allowed to send, to the terminal device, the second DCI for scheduling downlink data transmission of the first cell in a second period of time, where the first indication information in the first DCI indicates that the first cell performs downlink BWP handover.

In combination with the flow of the terminal side shown in fig. 7 and the flow of the network side shown in fig. 10, fig. 12 shows a schematic flow diagram of interaction between a network device and a terminal device according to an embodiment of the present application, where the flow includes:

1201: the network device sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to operate in the FDD mode in the first cell (the tuned cell), or the network device sends fourth indication information to the terminal device, where the fourth indication information is used to instruct the terminal device to operate in the TDD mode in the first cell (the tuned cell). This step is an optional step.

1202: The network device transmits first DCI to the terminal device, where the first DCI includes first indication information for instructing the first cell to perform BWP handover or includes second indication information for instructing the first cell to go dormant or non-dormant.

1203: The network device determines a second time period and stops or is not allowed to transmit a second DCI for scheduling the first cell to the terminal device for the second time period. A specific implementation may refer to fig. 10.

1204: The terminal equipment determines a first time period, and stops monitoring or stopping receiving second DCI (downlink control information) sent by the network equipment and used for scheduling the first cell in the first time period, or discards the received second DCI used for scheduling the first cell. A specific implementation may be refer to fig. 7.

In fig. 12, the network device may alternatively not perform step 1203, in which case the terminal device performs step 1204; optionally, the network device performs step 1203, and the terminal device may not perform step 1204; optionally, the network device performs step 1203 and the terminal device performs step 1204.

Reference is made to the foregoing embodiments for a specific implementation of the steps in fig. 12.

The execution sequence of step 1203 and step 1204 in fig. 12 is not limited by the embodiment of the present application.

In the above implementation manner, in a scenario in which the primary scheduling cell schedules one of the scheduled cells, if the network device instructs the first cell (i.e., the scheduled cell) to perform BWP handover through the first DCI, or instructs the first cell to go dormant or not dormant, the network device may not send the second DCI for scheduling the first cell to the terminal device for a second period of time thereafter, and/or the terminal device may stop monitoring or stopping receiving the second DCI or discard the received second DCI for a first period of time thereafter, so that the problem that the second DCI cannot be correctly sent and/or received may be avoided or reduced because the first cell performs BWP handover (the operation that the first cell goes dormant/not dormant is performed through BWP handover), and the active BWP in the first cell is in a fuzzy period (i.e., the scheduled cell does not have valid active BWP).

Based on the system architecture shown in fig. 6, fig. 13a and fig. 13b respectively show a flow chart of a communication method implemented at a terminal device side according to an embodiment of the present application. The flows of fig. 13a and 13b may be applied to a procedure in which one primary scheduling cell (referred to as a third cell in this embodiment) schedules a plurality of scheduled cells, and the flows of fig. 13a and 13b may be applied to a one-to-many cross-carrier scheduling scenario.

As shown in fig. 13a, the process may include the steps of:

S1301: the terminal equipment receives first DCI sent by the network equipment, wherein the first DCI comprises first indication information for indicating the first cell to perform BWP switching or comprises second indication information for indicating the first cell to go dormant or not dormant.

The specific implementation of this step can be seen in the relevant content of fig. 7 and will not be repeated here.

S1302: the terminal device determines a first time period.

The specific implementation of this step can be seen in the relevant content of fig. 7 and will not be repeated here.

S1303: the terminal equipment stops monitoring or stopping receiving third DCI (downlink control information) sent by the network equipment and used for scheduling at least one cell in the first cell group in a first time period, or discards the received third DCI used for scheduling at least one cell in the first cell group; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

The format of the third DCI is the first DCI format. The first DCI format can be used to schedule data transmission of two or more cells simultaneously. The first cell group is a set of all the tuned cells which can be scheduled by the first DCI format, and the number of cells in the first cell group is more than or equal to 2. The first cell and the second cell belong to a first cell group, and the first cell and the second cell are different.

Illustratively, the first DCI format includes a first indication field. A first indication field in the DCI in a first DCI format is used to indicate the group of cells scheduled by this DCI. The first indication domain may have various values, and the first cell group is a set of all the tuned cells that can be indicated by the first indication domain, that is, the first cell group is a set of all the tuned cells that can be indicated by all the values of the first indication domain.

Illustratively, the first DCI format is a multi-cell scheduling DCI format. It is to be appreciated that the first DCI format can be utilized to schedule uplink data transmission and/or downlink data transmission for two or more cells simultaneously. For example, the first DCI format can be used to schedule downlink data channels for two or more cells simultaneously, i.e., DCI in one format of the first DCI format schedules at least one downlink data channel on each of the two or more cells simultaneously. For example, the first DCI format can be used to schedule uplink data channels of two or more cells simultaneously, i.e., DCI in one format of the first DCI format schedules at least one uplink data channel on each of the two or more cells simultaneously. For example, the first DCI format can be used to schedule uplink data channels and/or downlink data channels of two or more cells simultaneously, i.e., DCI in one format of the first DCI format schedules at least one data channel, which may be an uplink data channel or a downlink data channel, on each of the two or more cells simultaneously. The downlink data channel may be a physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH), and the uplink data channel may be a Physical Uplink Shared Channel (PUSCH).

In a possible implementation manner, the third DCI for scheduling at least one cell in the first cell group may be DCI format 0_X or DCI format 1_X, which is not limited in this embodiment of the present application.

Taking DCI format 0_X or 1_X as an example, DCI format 0_X or 1_X may schedule one or more cells in a co-scheduled cell by means of joint indication, for example, DCI format 0_X may include a DCI domain indicating information for each cell in a first cell group, where the DCI domain may be a DCI domain indicating information to only a certain cell in the first cell group, or may be a DCI domain indicating information to a plurality of cells in the first cell group, where the first cell group is a subset of cells that can be scheduled by one DCI format 0_X or 1_X.

For example, in S1301, the first cell group includes the first cell, and further includes a second cell, and the third DCI is used to schedule the second cell. The second cell may be the same as or different from a third cell (the third cell is a primary tone cell of the first DCI). Alternatively, the third DCI may schedule a plurality of cells including the second cell, where the cells belong to the first cell group. Optionally, the primary tuning cell (third cell) and the tuned cell (first cell) of the first DCI are different.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform uplink BWP handover, the terminal device may stop monitoring or stop receiving the third DCI for scheduling uplink data transmission of at least one cell in the first cell group in the first period, or discard the received third DCI. Or under the condition that the first indication information is used for indicating the first cell to perform downlink BWP handover, the terminal device may stop monitoring or stop receiving third DCI sent by the network device and used for scheduling downlink data transmission of at least one cell in the first cell group in the first period, or discard the received third DCI. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in the FDD mode in the first cell.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform downlink BWP handover or is used to instruct the first cell to go dormant or not dormant, the terminal device may stop monitoring or stop receiving, in the first period of time, the third DCI for scheduling downlink and uplink data transmission of at least one cell in the first cell group, or discard the received third DCI. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in the FDD mode in the first cell.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform uplink BWP handover or downlink BWP handover or is used to instruct the first cell to go dormant or not dormant, the terminal device may stop monitoring or stop receiving, in a first period of time, third DCI sent by the network device and used to schedule uplink data transmission of at least one cell in the first cell group, or discard the received third DCI; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group. The format of the third DCI is the first DCI format. The first DCI format can be used to schedule uplink data transmission of two or more cells simultaneously. The first cell group is a set of all the tuned cells that can be scheduled by the first DCI format, and the first cell and the second cell belong to the first cell group. Further, the terminal device may stop monitoring or stop receiving the fourth DCI sent by the network device and used for scheduling downlink data transmission of at least one cell in the first cell group in the first period, or discard the received fourth DCI; wherein the at least one cell comprises a third cell, the third cell being different from the first cell, the third cell and the first cell belonging to the second cell group. The fourth DCI format is a second DCI format. The second DCI format can be used to schedule downlink data transmission for two or more cells simultaneously. The second cell group is a set of all the tuned cells that can be scheduled by the second DCI format, and the first cell and the third cell belong to the second cell group. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in a TDD mode in a first cell.

As shown in fig. 13b, the process may include the steps of:

S1310: the terminal equipment receives first DCI sent by the network equipment, wherein the first DCI comprises first indication information for indicating the first cell to perform BWP switching or comprises second indication information for indicating the first cell to go dormant or not dormant.

The specific implementation of this step can be seen in the relevant content of fig. 7 and will not be repeated here.

S1311: the terminal device determines a first time period.

The specific implementation of this step can be seen in the relevant content of fig. 7 and will not be repeated here.

S1312: the terminal device stops monitoring or stopping receiving the first DCI format sent by the network device in the first time period, or discards the received first DCI format. The first DCI format can be used to schedule data transmission of two or more cells simultaneously, where the first cell belongs to a first cell group, and the first cell group is a set of all the scheduled cells that the first DCI format can schedule.

Illustratively, the first DCI format includes a first indication field. A first indication field in the DCI in a first DCI format is used to indicate the group of cells scheduled by this DCI. The first indication domain may have various values, and the first cell group is a set of all the tuned cells that can be indicated by the first indication domain, that is, the first cell group is a set of all the tuned cells that can be indicated by all the values of the first indication domain.

Illustratively, the first DCI format is a multi-cell scheduling DCI format. It is to be appreciated that the first DCI format can be utilized to schedule uplink data transmission and/or downlink data transmission for two or more cells simultaneously. For example, the first DCI format can be used to schedule downlink data channels for two or more cells simultaneously, i.e., DCI in one format of the first DCI format schedules at least one downlink data channel on each of the two or more cells simultaneously. For example, the first DCI format can be used to schedule uplink data channels of two or more cells simultaneously, i.e., DCI in one format of the first DCI format schedules at least one uplink data channel on each of the two or more cells simultaneously. For example, the first DCI format can be used to schedule uplink data channels and/or downlink data channels of two or more cells simultaneously, i.e., DCI in one format of the first DCI format schedules at least one data channel, which may be an uplink data channel or a downlink data channel, on each of the two or more cells simultaneously. The downlink data channel may be a physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH), and the uplink data channel may be a Physical Uplink Shared Channel (PUSCH).

In a possible implementation manner, in a case that the first indication information is used to instruct the first cell to perform uplink BWP handover, the terminal device stops monitoring or stops receiving or discards the first DCI format sent by the received network device in the first period of time; the first DCI format can be used to schedule uplink data transmission of two or more cells simultaneously, where the first cell belongs to a first cell group, and the first cell group is a set of all the scheduled cells that the first DCI format can schedule. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in the FDD mode in the first cell.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform downlink BWP handover or is used to instruct the first cell to go dormant or not dormant, the terminal device stops monitoring or stops receiving or discards the first DCI format sent by the received network device in the first period of time; the first DCI format can be used to schedule downlink data transmission of two or more cells simultaneously, where the first cell belongs to a first cell group, and the first cell group is a set of all the scheduled cells that the first DCI format can schedule. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in the FDD mode in the first cell.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform uplink BWP handover or downlink BWP handover or is used to instruct the first cell to go dormant or not dormant, the terminal device stops monitoring or stops receiving or discarding the first DCI format sent by the received network device in the first period of time; the first DCI format can be used for simultaneously scheduling uplink data transmission of two or more cells, the first cell belongs to a first cell group, the first cell group is a set of all the scheduled cells which can be scheduled by the first DCI format, and the terminal equipment stops monitoring or stops receiving or discards a second DCI format sent by the received network equipment in a first time period; the second DCI format can be used to schedule downlink data transmission of two or more cells simultaneously, where the first cell belongs to a second cell group, and the second cell group is a set of all the scheduled cells that the second DCI format can schedule. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in a TDD mode in a first cell.

Based on the system architecture shown in fig. 6, fig. 14a and fig. 14b respectively show a flow chart of a communication method implemented at a network device side according to an embodiment of the present application. The flows of fig. 14a and 14b may be applied to a procedure in which one primary scheduling cell (referred to as a third cell in this embodiment) schedules a plurality of scheduled cells, and the flows of fig. 14a and 14b may be applied to a one-to-many cross-carrier scheduling scenario.

As shown in fig. 14a, the process may include the steps of:

S1401: the network device transmits first DCI to the terminal device, where the first DCI includes first indication information for instructing the first cell to perform BWP handover or includes second indication information for instructing the first cell to go dormant or non-dormant.

The description of the first DCI may refer to the relevant content in the flow shown in fig. 7, and will not be repeated here.

S1402: the network device determines a second time period.

The method for determining the second time period by the network device is the same as the method for determining the first time period by the terminal device, and the related method can be referred to as related content in the flow shown in fig. 7.

Since there is a delay in spatial transmission, the second time period is determined based on the timing of the network device, and the first time period is determined based on the timing of the terminal device, there may be a deviation in absolute time between the second time period and the first time period.

S1403: the network device stops or is not allowed to send third DCI for scheduling at least one cell in the first cell group to the terminal device in the second time period; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

The related description of the third DCI may refer to the related content in the flow shown in fig. 13a, and will not be repeated here.

In a possible implementation manner, before the network device sends the first DCI to the terminal device, the method may further include the following steps: the network device sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to operate in the FDD mode in the first cell.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform uplink BWP handover, the network device may stop or not be allowed to send, to the terminal device, third DCI for scheduling uplink data transmission of at least one cell in the first cell group for a second period of time.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform downlink BWP handover, the network device may stop or not be allowed to send, to the terminal device, third DCI for scheduling downlink data transmission of at least one cell in the first cell group for a second period of time.

As shown in fig. 14b, the process may include the steps of:

s1410: the network device transmits first DCI to the terminal device, where the first DCI includes first indication information for instructing the first cell to perform BWP handover or includes second indication information for instructing the first cell to go dormant or non-dormant.

The description of the first DCI may refer to the relevant content in the flow shown in fig. 7, and will not be repeated here.

S1411: the network device determines a second time period.

The method for determining the second time period by the network device is the same as the method for determining the first time period by the terminal device, and the related method can be referred to as related content in the flow shown in fig. 7.

S1412: the network device stops or is not allowed to transmit the first DCI format to the terminal device for a second period of time. The first DCI format can be used to schedule data transmission of two or more cells simultaneously, where the first cell belongs to a first cell group, and the first cell group is a set of all the scheduled cells that the first DCI format can schedule.

Illustratively, the first DCI format includes a first indication field. A first indication field in the DCI in a first DCI format is used to indicate the group of cells scheduled by this DCI. The first indication domain may have various values, and the first cell group is a set of all the tuned cells that can be indicated by the first indication domain, that is, the first cell group is a set of all the tuned cells that can be indicated by all the values of the first indication domain.

Illustratively, the first DCI format is a multi-cell scheduling DCI format. It is to be appreciated that the first DCI format can be utilized to schedule uplink data transmission and/or downlink data transmission for two or more cells simultaneously. For example, the first DCI format can be used to schedule downlink data channels for two or more cells simultaneously, i.e., DCI in one format of the first DCI format schedules at least one downlink data channel on each of the two or more cells simultaneously. For example, the first DCI format can be used to schedule uplink data channels of two or more cells simultaneously, i.e., DCI in one format of the first DCI format schedules at least one uplink data channel on each of the two or more cells simultaneously. For example, the first DCI format can be used to schedule uplink data channels and/or downlink data channels of two or more cells simultaneously, i.e., DCI in one format of the first DCI format schedules at least one data channel, which may be an uplink data channel or a downlink data channel, on each of the two or more cells simultaneously. The downlink data channel may be a physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH), and the uplink data channel may be a Physical Uplink Shared Channel (PUSCH).

In a possible implementation manner, in a case that the first indication information is used to instruct the first cell to perform uplink BWP handover, the terminal device stops monitoring or stops receiving or discards the first DCI format sent by the received network device in the first period of time; the first DCI format can be used to schedule uplink data transmission of two or more cells simultaneously, where the first cell belongs to a first cell group, and the first cell group is a set of all the scheduled cells that the first DCI format can schedule. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in the FDD mode in the first cell.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform downlink BWP handover or is used to instruct the first cell to go dormant or not dormant, the terminal device stops monitoring or stops receiving or discards the first DCI format sent by the received network device in the first period of time; the first DCI format can be used to schedule downlink data transmission of two or more cells simultaneously, where the first cell belongs to a first cell group, and the first cell group is a set of all the scheduled cells that the first DCI format can schedule. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in the FDD mode in the first cell.

In a possible implementation manner, in a case where the first indication information is used to instruct the first cell to perform uplink BWP handover or downlink BWP handover or is used to instruct the first cell to go dormant or not dormant, the terminal device stops monitoring or stops receiving or discarding the first DCI format sent by the received network device in the first period of time; the first DCI format can be used for simultaneously scheduling uplink data transmission of two or more cells, the first cell belongs to a first cell group, the first cell group is a set of all the scheduled cells which can be scheduled by the first DCI format, and the terminal equipment stops monitoring or stops receiving or discards a second DCI format sent by the received network equipment in a first time period; the second DCI format can be used to schedule downlink data transmission of two or more cells simultaneously, where the first cell belongs to a second cell group, and the second cell group is a set of all the scheduled cells that the second DCI format can schedule. Further, before receiving the first DCI sent by the network device, the terminal device may further include the following steps: the terminal equipment receives third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in a TDD mode in a first cell.

In combination with the flow of the terminal side shown in fig. 13a or fig. 13b and the flow of the network side shown in fig. 14a or fig. 14b, fig. 15 shows a schematic flow diagram of interaction between a network device and a terminal device according to an embodiment of the present application, where the flow includes:

1501: the network device sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to operate in the FDD mode in the first cell (the tuned cell), or the network device sends fourth indication information to the terminal device, where the fourth indication information is used to instruct the terminal device to operate in the TDD mode in the first cell (the tuned cell). This step is an optional step.

1502: The network device sends fifth indication information to the terminal device, where the fifth indication information is used to indicate that one or more cells (including uplink or downlink transmissions of the cells are scheduled) in the first cell group can be scheduled with one DCI, and the first cell group includes the first cell. This step is an optional step.

1503: The network device transmits first DCI to the terminal device, where the first DCI includes first indication information for instructing the first cell to perform BWP handover or includes second indication information for instructing the first cell to go dormant or non-dormant.

1504: The network device determining a second time period and stopping or not being allowed to send third DCI for scheduling at least one cell in the first cell group to the terminal device within the second time period; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

In another possible implementation, the network device determines a second time period and stops or is not allowed to transmit the first DCI format to the terminal device for the second time period.

The specific implementation may refer to fig. 14a or fig. 14b.

1505: The terminal equipment determines a first time period, and stops monitoring or stops receiving third DCI (downlink control information) sent by the network equipment and used for scheduling at least one cell in the first cell group in the first time period, or discards the received third DCI used for scheduling at least one cell in the first cell group; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

In another possible implementation manner, the terminal device determines a first period of time, and stops monitoring or stopping receiving the first DCI format sent by the network device in the first period of time, or discards the received first DCI format.

The specific implementation may refer to fig. 13a or fig. 13b.

In fig. 15, the network device may alternatively not perform step 1504, in which case the terminal device performs step 1505; optionally, the network device performs step 1504, and the terminal device may not perform step 1505; optionally, the network device performs step 1504 and the terminal device performs step 1505.

Reference is made to the previous embodiments for a specific implementation of the steps in fig. 15.

The execution sequence of step 1504 and step 1505 in fig. 15 is not limited by the embodiment of the present application.

In the above implementation manner, in a scenario in which the primary scheduling cell schedules a plurality of scheduled cells, if the network device instructs the first cell (i.e., the scheduled cell) to perform BWP handover through the first DCI, or instructs the first cell to go dormant or not dormant, the network device may not send the terminal device a third DCI for scheduling the second cell in the first cell group (i.e., the scheduled cell group) for a second period thereafter, and/or the terminal device may not receive or discard the received third DCI for the first period thereafter, so that the second cell in the scheduled cell group may be prevented or reduced from performing BWP handover because the first cell in the group performs BWP handover (the operation in which the first cell goes dormant/not dormant is performed by p handover), and the third size may not be determined when the active p in the first cell is in the ambiguity period (i.e., there is no active BWP in the scheduled cell), which results in a problem that the third DCI cannot be correctly sent and/or received.

In other embodiments of the present application, after the network device transmits the first DCI to the terminal device, the network device determines a second period of time and may stop or not be allowed to transmit the second DCI and the third DCI to the terminal device for the second period of time. After receiving the first DCI, the terminal device determines a first period, and may stop monitoring or stopping receiving the second DCI or discarding the received second DCI, and stop monitoring or stopping receiving the third DCI or discarding the received third DCI in the first period. The related implementation may refer to the foregoing embodiments, and will not be described herein.

Based on the same technical concept, the embodiment of the application also provides a communication device, which can realize the functions realized by the terminal equipment in the previous embodiment. As shown in fig. 16, the communication device 1600 may include a processing unit 1601 and a transceiver unit 1602.

A transceiver unit 1602, configured to receive a first DCI sent by a network device, where the first DCI includes first indication information for indicating that a first cell performs BWP handover, or includes second indication information for indicating that the first cell goes dormant or not dormant. A processing unit 1601 configured to determine a first time period; and stopping monitoring or receiving or discarding, in the first period of time, second DCI for scheduling the first cell, which is transmitted by the network device and received by the transceiver unit 1602, or stopping monitoring or receiving or discarding, in the first period of time, third DCI for scheduling at least one cell in the first cell group, which is transmitted by the network device and received by the transceiver unit 1602, which is received by the transceiver unit 1602; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

Alternatively, the determination method by which the processing unit 1601 determines the start time and the end time of the first period may be referred to the foregoing embodiments.

Optionally, in the case that the first indication information is used to indicate the first cell to perform uplink BWP handover, the processing unit 1601 is specifically configured to: and stopping monitoring or receiving or discarding, by the transceiver unit 1602, the second DCI sent by the network device and used for scheduling the uplink data transmission of the first cell, where the second DCI is received by the transceiver unit 1602, in the first period.

Optionally, in the case that the first indication information is used to indicate the first cell to perform downlink BWP handover, the processing unit 1601 is specifically configured to: and stopping monitoring or receiving or discarding, by the transceiver unit 1602, the second DCI sent by the network device and used for scheduling the downlink data transmission of the first cell, where the second DCI is received by the transceiver unit 1602, in the first period.

Optionally, in the case that the first indication information is used to indicate the first cell to perform uplink BWP handover, the processing unit 1601 is specifically configured to: and stopping monitoring or receiving or discarding, by the transceiver unit 1602, the third DCI sent by the network device and used for scheduling uplink data transmission of at least one cell in the first cell group, in the first period.

Optionally, in the case that the first indication information is used to indicate the first cell to perform downlink BWP handover, the processing unit 1601 is specifically configured to: and stopping monitoring or receiving or discarding, by the transceiver unit 1602, the third DCI sent by the network device and used for scheduling downlink data transmission of at least one cell in the first cell group, in the first period.

Optionally, before the transceiver unit 1602 receives the first DCI sent by the network device, third indication information sent by the network device is further received, where the third indication information is used to indicate that the terminal device works in the frequency division duplex mode in the first cell.

Optionally, in the case that the first indication information is used to indicate that the first cell performs uplink BWP handover or downlink BWP handover, the processing unit 1601 is specifically configured to: stopping monitoring or stopping receiving, by the transceiver unit 1602, the second DCI sent by the network device and used for scheduling the first cell in the first period, or discarding the second DCI received by the transceiver unit 1602; the second DCI includes DCI for scheduling uplink data transmission of the first cell and DCI for scheduling downlink data transmission of the first cell.

Optionally, in the case where the first indication information is used to indicate that the first cell performs uplink BWP handover or downlink BWP handover or is used to indicate that the first cell goes dormant or non-dormant, the processing unit 1601 is specifically configured to: and stopping monitoring or stopping receiving the third DCI sent by the network device and used for scheduling uplink data transmission of at least one cell in the first cell group through the transceiver unit 1602 in the first period, or discarding the third DCI received by the transceiver unit 1602.

Optionally, the processing unit 1601 is further configured to: and stopping monitoring or stopping receiving the fourth DCI sent by the network device and used for scheduling downlink data transmission of at least one cell in the first cell group through the transceiver unit 1602 in the first period, or discarding the fourth DCI received by the transceiver unit 1602.

Optionally, before receiving the first DCI sent by the network device, the transceiver unit 1602 is further configured to: and receiving fourth indication information sent by the network equipment, wherein the fourth indication information is used for indicating the terminal equipment to work in a time division duplex mode in the first cell.

It can be understood that the communication device provided in the embodiment of the present application can implement all the method steps implemented by the terminal device in the embodiment of the method, and can achieve the same technical effects, and the same parts and beneficial effects as those in the embodiment of the method are not described in detail herein.

Based on the same technical concept, the embodiment of the application also provides a communication device, which can realize the functions realized by the network equipment in the previous embodiment. As shown in fig. 17, the communication apparatus 1700 may include a processing unit 1701 and a transceiving unit 1702.

A transceiving unit 1702 configured to send first downlink control information DCI to a terminal device, where the first DCI includes first indication information for instructing a first cell to perform a BWP handover, or includes second indication information for instructing the first cell to go dormant or not dormant. A processing unit 1701 for determining a second time period; and stopping or not being allowed to transmit second DCI for scheduling the first cell to the terminal device through the transceiving unit 1702 in the second period of time, or stopping or not being allowed to transmit third DCI for scheduling at least one cell of the first cell group to the terminal device through the transceiving unit 1702 in the second period of time; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

Alternatively, the determination method by which the processing unit 1701 determines the start time and the end time of the second period may be referred to the foregoing embodiments.

Optionally, when the first indication information is used to indicate that the first cell performs uplink BWP handover, the processing unit 1701 is specifically configured to: stopping or not being allowed to transmit a second DCI for scheduling the uplink data transmission of the first cell to the terminal device through the transceiving unit 1702 in the second period.

Optionally, in the case that the first indication information is used to indicate the first cell to perform downlink BWP handover, the processing unit 1701 is specifically configured to: stopping or not being allowed to transmit a second DCI for scheduling the downlink data transmission of the first cell to the terminal device through the transceiving unit 1702 in the second period.

Optionally, when the first indication information is used to indicate that the first cell performs uplink BWP handover, the processing unit 1701 is specifically configured to: and stopping or not allowing the transmission of third DCI for scheduling uplink data transmission of at least one cell in the first cell group to the terminal equipment through the transceiving unit 1702 in the second time period.

Optionally, in the case that the first indication information is used to indicate the first cell to perform downlink BWP handover, the processing unit 1701 is specifically configured to: and stopping or not allowing the transmission of third DCI for scheduling downlink data transmission of at least one cell in the first cell group to the terminal equipment through the transceiving unit 1702 in the second time period.

Optionally, before sending the first DCI to the terminal device, the transceiver 1702 further sends third indication information to the terminal device, where the third indication information is used to instruct the terminal device to operate in a frequency division duplex mode in the first cell.

Optionally, in the case that the first indication information is used to indicate that the first cell performs uplink BWP handover or downlink BWP handover, the processing unit 1701 is specifically configured to: stopping or not being allowed to transmit a second DCI for scheduling the first cell to the terminal device through the transceiving unit 1702 for the second period of time; the second DCI includes DCI for scheduling uplink data transmission of the first cell and DCI for scheduling downlink data transmission of the first cell.

Optionally, in the case where the first indication information is used to indicate that the first cell performs uplink BWP handover or downlink BWP handover or is used to indicate that the first cell goes dormant or non-dormant, the processing unit 1701 is specifically configured to: and stopping or not allowing to send third DCI for scheduling at least one cell uplink data transmission in the first cell group to the terminal equipment in the second time period.

Optionally, the processing unit 1701 is further configured to: and stopping or not allowing the transmission of fourth DCI for scheduling downlink data transmission of at least one cell in the first cell group to the terminal equipment through the transceiving unit 1702 in the second time period.

Optionally, before sending the first DCI to the terminal device, the processing unit 1701 is further configured to: and sending fourth indication information to the terminal equipment through the receiving and sending unit 1702, where the fourth indication information is used to instruct the terminal equipment to operate in a time division duplex mode in the first cell.

It can be understood that the communication device provided in the embodiment of the present application can implement all the method steps implemented by the network device in the embodiment of the method and achieve the same technical effects, and the same parts and beneficial effects as those in the embodiment of the method are not described in detail herein.

For ease of understanding, only the structures required by the communications device 1800 to perform the method of the application are shown in fig. 18, and the application is not limited by the many more components that the communications device may have. The communication apparatus 1800 may be configured to perform the steps performed by the relevant device in the method embodiments described above, e.g., the relevant device may be a terminal device or a network device.

The communication device 1800 may include a transceiver 1801, a memory 1803, and a processor 1802, with the transceiver 1801, the memory 1803, and the processor 1802 being connectable through the bus 1804. The transceiver 1801 may be used for communication by a communication device, such as for transmitting or receiving signals. The memory 1803 is coupled to the processor 1802 and can be used to store programs and data necessary for the communication device 1800 to perform various functions. The above memory 1803 and the processor 1802 may be integrated or independent.

The transceiver 1801 may be, for example, a communication port, such as a communication port (or interface) between network elements for communication. The transceiver 1801 may also be referred to as a transceiver unit or a communication unit. The processor 1802 may be implemented by a processing chip or processing circuit. The transceiver 1801 may receive or transmit information wirelessly or by wire.

In addition, according to the actual use requirement, the communication device provided by the embodiment of the application can include a processor, and the processor invokes an external transceiver and/or a memory to realize the functions or steps or operations. The communication device may also include a memory that is invoked by the processor and executes a program stored in the memory to perform the functions or steps or operations described above. Alternatively, the communication device may include a processor and a transceiver (or a communication interface), where the processor invokes and executes a program stored in an external memory to perform the functions or steps or operations described above. Or the communication device may also include a processor, memory, and transceiver.

Based on the same concept as the above method embodiments, in an embodiment of the present application, a computer readable storage medium is further provided, on which a program instruction (or called a computer program, an instruction) is stored, where the program instruction when executed by a processor causes the computer to perform an operation performed by a terminal device or a network device in any one of possible implementation manners of the above method embodiments, method embodiments.

Based on the same conception as the above method embodiments, the present application also provides a computer program product comprising program instructions which, when being invoked by a computer for execution, may cause the computer to implement the operations performed by the terminal device or the network device in any one of the possible implementation manners of the above method embodiments.

Based on the same conception as the above method embodiments, the present application also provides a chip or a chip system, the chip being coupled with the transceiver for implementing the operations performed by the terminal device or the network device in any one of the possible implementations of the above method embodiments. The chip system may include the chip, as well as components including memory, communication interfaces, and the like.

Based on the same conception as the method embodiment, the embodiment of the application also provides a communication system. Optionally, the communication system includes a terminal device and a network device, where the terminal device may perform the operation of the terminal device in the method embodiment, and the network device may perform the operation of the network device in the method embodiment.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (29)

1. A method of communication, comprising:

Receiving first Downlink Control Information (DCI) sent by network equipment, wherein the first DCI comprises first indication information for indicating a first cell to perform bandwidth part (BWP) switching or second indication information for indicating the first cell to enter dormancy or non-dormancy;

Determining a first time period;

Stopping monitoring or stopping receiving second DCI which is sent by the network equipment and is used for scheduling the first cell in the first time period, or discarding the received second DCI, or stopping monitoring or stopping receiving third DCI which is sent by the network equipment and is used for scheduling at least one cell in a first cell group in the first time period, or discarding the received third DCI; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

2. The method of claim 1, wherein:

The starting time of the first time period is as follows:

The end time of the first 3 symbols of a first time slot of a third cell where the first DCI is located, wherein the first time slot is the time slot where the first DCI is located; or alternatively

An ending time of a Physical Downlink Control Channel (PDCCH) carrying the first DCI; or alternatively

And starting time of a first time slot, wherein the first time slot is the time slot where the first DCI is located.

3. A method according to claim 1 or 2, characterized in that:

In the case that the first DCI includes the first indication information, an end time of the first period is a start time of a slot indicated by a slot offset in a time domain resource indication domain of the first DCI; or alternatively

When the first DCI includes the first indication information and the first indication information indicates that the first cell performs downlink BWP handover, the ending time of the first period is a starting time of a first downlink slot after a first time interval from the starting time of the first slot; or alternatively

When the first DCI includes the first indication information and the first indication information indicates that the first cell performs uplink BWP handover, the ending time of the first period is a starting time of a first uplink slot after a first time interval from the starting time of the first slot;

Wherein the first time interval is associated with a BWP switch delay.

4. A method according to claim 3, wherein the first time interval is equal to T _{BWPswitchDelay} +y;

Wherein the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier spacing of the third cell, the subcarrier spacing of BWP before the first cell handover, and the subcarrier spacing of BWP after the first cell handover;

the value of Y includes:

in case the first cell and the third cell are not the same cell, the value of Y is equal to 1; or alternatively

In the case where the first cell and the third cell are the same cell, the value of Y is equal to 0; or alternatively

And under the condition that the frequency points of the first cell and the third cell are in a frequency domain range FR2-2, the value of Y is determined according to the 120KHz subcarrier interval.

5. A method according to claim 1 or 2, characterized in that:

in a case that the first DCI includes the second indication information and the second indication information indicates that downlink BWP of the first cell is dormant, the ending time of the first period is a starting time of a first downlink slot after a second time interval from the starting time of the first slot; or alternatively

In a case that the first DCI includes the second indication information and the second indication information indicates that the uplink BWP of the first cell is dormant, the ending time of the first period is a starting time of a first uplink slot after a second time interval from the starting time of the first slot;

wherein the second time interval is related to a BWP switch delay.

6. The method of claim 5, wherein the second time interval is equal to T _{BWPswitchDelay} + X if the first DCI is transmitted in the first 3 symbols in one slot of the third cell or is equal to T _{BWPswitchDelay} + X + Z if the first DCI is not transmitted in the first 3 symbols in one slot of the third cell;

wherein the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier spacing of the third cell, the subcarrier spacing of the first cell dormant BWP, and the subcarrier spacing of the activated BWP before or after the first cell handover;

The value of X is equal to 1, and the unit of X is a time slot, where the time slot corresponds to the minimum value of the subcarrier interval of the third cell, the subcarrier interval of the first cell dormant BWP, and the subcarrier interval of the first cell activated BWP before or after the switching; or under the condition that the frequency points of the first cell and the third cell are in a frequency domain range FR2-2, the value of X is determined according to a 120KHz subcarrier interval;

the value of Z is equal to 1, and the unit of Z is a time slot, where the time slot corresponds to a subcarrier spacing of the third cell.

7. The method of any one of claims 1-4, wherein, in a case where the first indication information is used to indicate that the first cell performs uplink BWP handover, stopping monitoring or stopping receiving, in the first period of time, second DCI sent by the network device and used to schedule the first cell, or discarding the received second DCI, includes: stopping monitoring or stopping receiving second DCI (downlink control information) sent by the network equipment and used for scheduling uplink data transmission of the first cell in the first time period, or discarding the received second DCI; or alternatively

And when the first indication information is used for indicating the first cell to perform downlink BWP handover, stopping monitoring or stopping receiving the second DCI sent by the network device and used for scheduling the first cell in the first period, or discarding the received second DCI, where the first indication information includes: and stopping monitoring or stopping receiving second DCI sent by the network equipment and used for scheduling the downlink data transmission of the first cell in the first time period, or discarding the received second DCI.

8. The method of any one of claims 1-4, wherein, in the case where the first indication information is used to indicate that the first cell performs uplink BWP handover, stopping monitoring or stopping receiving, in the first period of time, third DCI sent by the network device and used to schedule at least one cell in a first cell group, or discarding the received third DCI, includes: stopping monitoring or stopping receiving third DCI (downlink control information) sent by the network equipment and used for scheduling uplink data transmission of at least one cell in a first cell group in the first time period, or discarding the received third DCI; or alternatively

And when the first indication information is used for indicating the first cell to perform downlink BWP handover, stopping monitoring or stopping receiving third DCI sent by the network device and used for scheduling at least one cell in a first cell group in the first period, or discarding the third DCI, where the step includes: and stopping monitoring or stopping receiving third DCI which is sent by the network equipment and is used for scheduling downlink data transmission of at least one cell in the first cell group in the first time period, or discarding the third DCI.

9. The method of claim 7 or 8, wherein prior to receiving the first DCI transmitted by the network device, the method further comprises:

And receiving third indication information sent by the network equipment, wherein the third indication information is used for indicating the terminal equipment to work in a frequency division duplex mode in the first cell.

10. The method of any one of claims 1-4, wherein, in a case where the first indication information is used to indicate that the first cell performs an uplink BWP handover or a downlink BWP handover, the stopping monitoring or stopping receiving, in the first period of time, the second DCI sent by the network device and used to schedule the first cell, or discarding the received second DCI, includes:

Stopping monitoring or stopping receiving second DCI (downlink control information) sent by the network equipment and used for scheduling the first cell in the first time period, or discarding the received second DCI; the second DCI includes DCI for scheduling uplink data transmission of the first cell and DCI for scheduling downlink data transmission of the first cell.

11. The method of any of claims 1-4, wherein, in a case where the first indication information is used to instruct the first cell to perform an uplink BWP handover or a downlink BWP handover or to instruct the first cell to go dormant or not dormant, stopping monitoring or stopping receiving, in the first period of time, third DCI sent by the network device and used to schedule at least one cell in the first cell group, or discarding the received third DCI, includes:

And stopping monitoring or stopping receiving third DCI which is sent by the network equipment and is used for scheduling uplink data transmission of at least one cell in the first cell group in the first time period, or discarding the received third DCI.

12. The method of claim 11, wherein the method further comprises:

And stopping monitoring or stopping receiving the fourth DCI which is sent by the network equipment and is used for scheduling the downlink data transmission of at least one cell in the first cell group in the first time period, or discarding the received fourth DCI.

13. The method of any one of claims 10-12, wherein prior to receiving the first DCI transmitted by the network device, the method further comprises:

and receiving fourth indication information sent by the network equipment, wherein the fourth indication information is used for indicating the terminal equipment to work in a time division duplex mode in the first cell.

14. A method of communication, comprising:

Transmitting first Downlink Control Information (DCI) to terminal equipment, wherein the first DCI comprises first indication information for indicating a first cell to perform bandwidth part (BWP) switching or comprises second indication information for indicating the first cell to go dormant or not dormant;

Determining a second time period;

Stopping or not being allowed to transmit second DCI for scheduling the first cell to the terminal device for the second period of time, or stopping or not being allowed to transmit third DCI for scheduling at least one cell of the first cell group to the terminal device for the second period of time; wherein the at least one cell comprises a second cell, the second cell being different from the first cell, the second cell and the first cell belonging to the first cell group.

15. The method as recited in claim 14, wherein:

The starting time of the second time period is as follows:

The end time of the first 3 symbols of a first time slot of a third cell where the first DCI is located, wherein the first time slot is the time slot where the first DCI is located; or alternatively

An ending time of a Physical Downlink Control Channel (PDCCH) carrying the first DCI; or alternatively

And starting time of a first time slot, wherein the first time slot is the time slot where the first DCI is located.

16. The method of claim 14 or 15, wherein:

In the case that the first DCI includes the first indication information:

The ending time of the second time period is the starting time of a time slot indicated by the time slot offset in the time domain resource indication domain of the first DCI; or alternatively

When the first DCI includes the first indication information and the first indication information indicates that the first cell performs downlink BWP handover, the ending time of the second period is a starting time of a first downlink slot after a first time interval from the starting time of the first slot; or alternatively

When the first DCI includes the first indication information and the first indication information indicates that the first cell performs uplink BWP handover, the ending time of the second period is a starting time of a first uplink slot after a first time interval from the starting time of the first slot;

Wherein the first time interval is associated with a BWP switch delay.

17. The method of claim 16, wherein the first time interval is equal to T _{BWPswitchDelay} + Y;

Wherein the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier spacing of the third cell, the subcarrier spacing of BWP before the first cell handover, and the subcarrier spacing of BWP after the first cell handover;

the value of Y includes:

in case the first cell and the third cell are not the same cell, the value of Y is equal to 1; or alternatively

In the case where the first cell and the third cell are the same cell, the value of Y is equal to 0; or alternatively

And under the condition that the frequency points of the first cell and the third cell are in a frequency domain range FR2-2, the value of Y is determined according to the 120KHz subcarrier interval.

18. The method of claim 14 or 15, wherein:

In a case that the first DCI includes the second indication information and the second indication information indicates that downlink BWP of the first cell is dormant, an end time of the second period is a start time of the first downlink slot after a second time interval from the start time of the first slot; or alternatively

In a case that the first DCI includes the second indication information and the second indication information indicates that the uplink BWP of the first cell is dormant, the ending time of the second period is a starting time of the first uplink slot after a second time interval from the starting time of the first slot;

wherein the second time interval is related to a BWP switch delay.

19. The method of claim 18, wherein the second time interval is equal to T _{BWPswitchDelay} + X if the first DCI is transmitted in the first 3 symbols in one slot of the third cell or is equal to T _{BWPswitchDelay} + X + Z if the first DCI is not transmitted in the first 3 symbols in one slot of the third cell;

wherein the value of T _{BWPswitchDelay} is determined according to the minimum value of the subcarrier spacing of the third cell, the subcarrier spacing of the first cell dormant BWP, and the subcarrier spacing of the activated BWP before or after the first cell handover;

The value of X is equal to 1, and the unit of X is a time slot, where the time slot corresponds to the minimum value of the subcarrier interval of the third cell, the subcarrier interval of the first cell dormant BWP, and the subcarrier interval of the first cell activated BWP before or after the switching; or under the condition that the frequency points of the first cell and the third cell are in a frequency domain range FR2-2, the value of X is determined according to a 120KHz subcarrier interval;

the value of Z is equal to 1, and the unit of Z is a time slot, where the time slot corresponds to a subcarrier spacing of the third cell.

20. The method of any one of claims 14-17, wherein, in a case where the first indication information is used to indicate that the first cell performs an uplink BWP handover, the stopping or not being allowed to send the second DCI for scheduling the first cell to the terminal device in the second period of time includes: stopping or not allowing to send second DCI for scheduling the uplink data transmission of the first cell to the terminal equipment in the second time period; or alternatively

In a case that the first indication information is used to indicate the first cell to perform downlink BWP handover, the stopping or not being allowed to send the second DCI for scheduling the first cell to the terminal device in the second period of time includes: stopping or not allowing to send second DCI for scheduling the downlink data transmission of the first cell to the terminal equipment in the second time period.

21. The method of any one of claims 14-17, wherein, in a case where the first indication information is used to indicate that the first cell performs an uplink BWP handover, the stopping or not being allowed to send, for the second period of time, third DCI for scheduling at least one cell in the first cell group to the terminal device includes: stopping or not being allowed to send third DCI for scheduling uplink data transmission of at least one cell of the first cell group to the terminal device within the second period; or alternatively

In the case that the first indication information is used to indicate the first cell to perform downlink BWP handover, the stopping or not being allowed to send, to the terminal device, third DCI for scheduling at least one cell in the first cell group in the second period includes: and stopping or not allowing to send third DCI for scheduling downlink data transmission of at least one cell in the first cell group to the terminal equipment in the second time period.

22. The method of claim 20 or 21, wherein prior to transmitting the first DCI to the terminal device, the method further comprises:

and sending third indication information to the terminal equipment, wherein the third indication information is used for indicating the terminal equipment to work in a frequency division duplex mode in the first cell.

23. The method of any of claims 14-17, wherein, in a case where the first indication information is used to indicate that the first cell performs an uplink BWP handover or a downlink BWP handover, the stopping or not being allowed to send the second DCI for scheduling the first cell to the terminal device for the second period of time includes:

stopping or not being allowed to transmit a second DCI for scheduling the first cell to the terminal device for the second period of time; the second DCI includes DCI for scheduling uplink data transmission of the first cell and DCI for scheduling downlink data transmission of the first cell.

24. The method of any of claims 14-17, wherein the stopping or not being allowed to send the second DCI for scheduling the first cell to the terminal device for the second period of time in a case where the first indication information is used to instruct the first cell to perform an uplink BWP handover or a downlink BWP handover or to instruct the first cell to go dormant or not dormant, comprises:

and stopping or not allowing to send third DCI for scheduling at least one cell uplink data transmission in the first cell group to the terminal equipment in the second time period.

25. The method of claim 24, wherein the method further comprises:

And stopping or not allowing the transmission of fourth DCI for scheduling the downlink data transmission of at least one cell in the first cell group to the terminal equipment in the second time period.

26. The method of any one of claims 23-25, wherein prior to transmitting the first DCI to the terminal device, the method further comprises:

And sending fourth indication information to the terminal equipment, wherein the fourth indication information is used for indicating the terminal equipment to work in a time division duplex mode in the first cell.

27. A communication device, comprising: one or more processors; wherein the instructions of the one or more computer programs, when executed by the one or more processors, cause the communications apparatus to perform the method of any of claims 1-13 or perform the method of any of claims 14-26.

28. A computer readable storage medium comprising a computer program which, when run on a computing device, causes the computing device to perform the method of any of claims 1-13 or to perform the method of any of claims 14-26.

29. A chip, characterized in that the chip is coupled to a memory for reading and executing program instructions stored in the memory for implementing the method according to any of claims 1-13 or for implementing the method according to any of claims 14-26.