Method for controlling BWP, relevant device and system
The present disclosure provides a method for controlling BWP, a relevant device and a system. The method includes: notifying a UE to activate or deactivate a target BWP by transmitting DCI at least once which includes information of the target BWP for activating or deactivating the target BWP.
1. A method for controlling bandwidth part (BWP) applicable to a base station, comprising:
transmitting downlink control information (DCI) to a user equipment (UE) at least once, wherein each DCI comprises information of a target BWP for notifying the UE to activate or deactivate the target BWP; and
activating or deactivating the target BWP;
wherein a slot for activating or deactivating the target BWP, and/or a transmission order of each DCI is implicitly indicated by at least one of a cyclic redundancy check (CRC) code of each DCI, a demodulation reference signal (DMRS) of each DCI, or a control source set (CORESET) in which the DCI is located.
2. The method according to claim 1 , wherein the information of the target BWP comprises an index of the target BWP.
3. The method according to claim 1 , wherein the DCI transmitted to the UE is a UE specific DCI, a group common DCI, a scheduling DCI or a configured grant DCI, wherein the UE specific DCI, the group common DCI, the scheduling DCI or the configured grant DCI comprises therein an information field of information for indicating the target BWP; or
the DCI transmitted to the UE is a DCI dedicated to activating or deactivating the target BWP.
4. The method according to claim 1 , wherein, prior to the step of transmitting the downlink control information (DCI) to the UE at least once, the method comprises:
configuring a BWP set to the UE, the BWP set comprising N BWPs, wherein N is an integer greater than or equal to 1;
wherein each DCI indicates the index of the target BWP by using N or M×ceil(log 2 N) bits, wherein M is an integer greater than or equal to 1, and less than or equal to N, and the ceil is a rounding up function.
5. The method according to claim 1 , wherein each DCI comprises indication information;
wherein the indication information is used to indicate a timing for activating or deactivating the target BWP; or
the indication information is used to indicate a transmission order of the DCI.
6. The method according to claim 5 , wherein the indication information is a count value, and a count value contained in a retransmitted DCI is a count value for an initially transmitted DCI plus or minus the number of retransmissions.
7. The method according to claim 1 , wherein the step of transmitting the downlink control information (DCI) to the UE at least once comprises:
transmitting the downlink control information (DCI) to the UE for K times, wherein K is a preset number of transmissions, and is an integer greater than or equal to 1;
the step of activating or deactivating the target BWP comprises:
activating or deactivating the target BWP after the DCI has been transmitted for K times.
8. The method according to claim 7 , wherein the step of transmitting the DCI to the UE for K times comprises:
transmitting the DCI to the UE for K times in different slots, wherein a transmission order of each DCI is implicitly indicated by the slot in which the DCI is located.
9. The method according to claim 7 , wherein the step of transmitting the downlink control information (DCI) to the UE for K times comprises:
transmitting the DCI to the UE for K times from an original BWP;
the step of activating or deactivating the target BWP comprises:
activating or deactivating the target BWP if a first transmission of the DCI to the UE is completed.
10. The method according to claim 1 , wherein each DCI transmitted to the UE is identical, and is transmitted in different slots, a transmission order of the DCI is implicitly indicated by the slot in which the DCI is located; or
each DCI transmitted to the UE has distinct redundancy version, and each DCI is transmitted in different slot, a transmission order of the DCI is implicitly indicated by the slot in which the DCI is located.
11. The method according to claim 1 , wherein the step of activating or deactivating the target BWP after one or more DCI is transmitted comprises:
upon receipt of an acknowledgment (ACK) transmitted by the UE, activating or deactivating the target BWP in x slots after receiving the ACK, wherein the ACK is fed back by the UE which received the DCI, and x is an integer greater than or equal to 1.
12. A method for controlling bandwidth part (BWP) applicable to a user equipment (UE), comprising:
receiving at least one DCI transmitted by a base station, wherein each DCI comprises information of a target BWP for notifying the UE to activate or deactivate the target BWP; and
activating or deactivating the target BWP according to the information of the target BWP;
wherein a slot for activating or deactivating the target BWP, and/or a transmission order of each DCI is implicitly indicated by at least one of a cyclic redundancy check (CRC) code of each DCI, a demodulation reference signal (DMRS) of each DCI, or a control source set (CORESET) in which the DCI is located.
13. The method according to claim 12 , wherein the DCI received by the UE is a UE specific DCI, a group common DCI, a scheduling DCI or a configured grant DCI, wherein the UE specific DCI, the group common DCI, the scheduling DCI or the configured grant DCI comprises therein an information field of information for indicating the target BWP; or
the DCI transmitted to the UE is a DCI dedicated to activating or deactivating the target BWP.
14. The method according to claim 12 , wherein the information of the target BWP is used to indicate the target BWP in a BWP set that is configured for the UE by the base station, the BWP set comprises N BWPs, wherein N is an integer greater than or equal to 1; and wherein each DCI indicates the index of the target BWP by using N or M×ceil(log 2 N) bits, wherein M is an integer greater than or equal to 1, and less than or equal to N, and the ceil is a rounding up function.
15. The method according to claim 12 , wherein each DCI comprises indication information;
wherein the indication information is used to indicate a timing for activating or deactivating the target BWP; or
the indication information is used to indicate a transmission order of the DCI;
wherein the step of receiving the at least one DCI transmitted by the base station comprises:
receiving k DCIs transmitted by the base station, wherein k is an integer less than or equal to K, and K is a number of transmitting the DCI preset by the base station;
the step of activating or deactivating the target BWP according to the information of the target BWP comprises:
after receiving the k DCIs, activating or deactivating the target BWP according to an index of one or more of the k DCIs, in an activation or deactivation slot indicated by the indication information of this DCI, or in an activation or deactivation slot corresponding to the transmission order indicated by the indication information of this DCI.
16. The method according to claim 12 , wherein the step of receiving the at least one DCI transmitted by the base station comprises:
receiving the at least one DCI transmitted by the base station from an original BWP; and
after the step of activating or deactivating the target BWP according to the information of the target BWP, the method further comprises:
receiving data transmitted by the base station in the target BWP.
17. The method according to claim 14 , wherein, after the step of receiving the at least one DCI transmitted by the base station, the method comprises:
transmitting an acknowledgment (ACK) to the base station, and stopping detection of the DCI.
18. A base station, comprising: a storage, a processor, and a computer program which is stored on the storage and is capable of running on the processor, the computer program, when executed by the processor, is capable of implementing the steps in the method for controlling BWP according to claim 1 .
19. A user equipment, comprising: a storage, a processor, and a computer program which is stored on the storage and is capable of running on the processor, the computer program, when executed by the processor, is capable of implementing the steps in the method for controlling BWP according to claim 12 .