Downlink data receiving method and device, downlink data sending method and device, and storage medium
The present application relates to the technical field of communications, and relates to a downlink data receiving method and device, a downlink data sending method and device, and a storage medium. The method comprises: a terminal receives first DCI carried on a first PDCCH that is sent by a base station by means of n antenna panels, wherein the first DCI is used for scheduling m antenna panels of the base station to respectively send downlink data to the terminal, m is an integer greater than 1, and n is a positive integer; the terminal determines, according to the first DCI, a target receiving beam used for receiving the downlink data; and the terminal receives the downlink data by means of the target receiving beam. The method solves the problem of downlink scheduling when multiple antenna panels send downlink data.
1. A method for receiving downlink data, comprising:
receiving, by a terminal, first downlink control information (DCI) that is carried on a first physical downlink control channel (PDCCH) and sent by a base station through n antenna panels, wherein the first DCI schedules a plurality of antenna panels of the base station to respectively send downlink data to the terminal, and n is a positive integer,
wherein a number of Control Resource Sets (CORESETs) that are used for sending PDCCHs and are preconfigured by the base station for the terminal is k, and PDCCHs sent by at least two of the k CORESETs are configured to be sent using different antenna panels, k being an integer greater than 1;
determining, by the terminal according to the first DCI, at least one target receiving beam for receiving the downlink data; and
receiving, by the terminal, the downlink data using the at least one target receiving beam,
wherein the method further comprises:
in response to the terminal being not able to determine the at least one target receiving beam according to the first DCI, receiving, by the terminal, the downlink data using at least one default receiving beam,
wherein the at least one default receiving beam is at least one receiving beam used by the terminal to receive a second PDCCH, wherein the second PDCCH is a PDCCH, in a latest scheduling unit that receives a PDCCH which is from a same antenna panel as the first PDCCH from, sent by a CORESET with a minimum number in at least one CORESET sent by the same antenna panel.
2. The method of claim 1 , wherein determining, by the terminal according to the first DCI, the at least one target receiving beam for receiving the downlink data comprises:
determining, by the terminal according to a plurality of transmission configuration indication (TCI) states carried in the first DCI, a plurality receiving beams corresponding to the plurality of TCI states as the at least one target receiving beam.
3. The method of claim 1 , wherein a number of the at least one default receiving beam is one or more.
4. The method of claim 1 ,
wherein the method further comprises:
receiving, by the terminal, CORESET configuration information sent by the base station, wherein the CORESET configuration information comprises identification information of antenna panels for sending PDCCH using CORESET.
5. A method for sending downlink data, comprising:
sending, by a base station, first downlink control information (DCI) carried on a first physical downlink control channel (PDCCH) to a terminal through n antenna panels, wherein the first DCI schedules a plurality of antenna panels of the base station to respectively send downlink data to the terminal, and n is a positive integer,
wherein a number of Control Resource Sets (CORESETs) that are used for sending PDCCHs and are preconfigured by the base station for the terminal is k, and PDCCHs sent by at least two of the k CORESETs are configured to be sent using different antenna panels, k being an integer greater than 1; and
respectively sending, by the base station, the downlink data to the terminal through the plurality of antenna panels,
wherein the first DCI is configured to be used by the terminal to determine at least one target receiving beam used for receiving the downlink data so as to receive the downlink data by using the least one target receiving beam,
wherein in response to that the at least one target receiving beam is not able to be determined according to the first DCI, at least one default receiving beam is used to receive the downlink data,
wherein the at least one default receiving beam is at least one receiving beam used by the terminal to receive a second PDCCH, wherein the second PDCCH is a PDCCH, in a latest scheduling unit that receives a PDCCH which is from a same antenna panel as the first PDCCH from, sent by a CORESET with a minimum number in at least one CORESET sent by the same antenna panel.
6. The method of claim 5 , wherein a plurality of transmission configuration indication (TCI) states are carried in the first DCI, and the plurality of TCI states indicate a plurality of receiving beams that correspond to the plurality of TCI states and are used by the terminal for receiving the downlink data.
7. The method of claim 5 , further comprising:
sending, by the base station, CORESET configuration information to the terminal, wherein the CORESET configuration information comprises identification information of antenna panels for sending PDCCH using CORESET.
8. The method of claim 5 , further comprising:
sending, by the base station, a medium access control (MAC) signaling to the terminal, wherein the MAC signaling activates a target TCI state, and the target TCI state indicates a receiving beam used by the terminal for receiving the first PDCCH.
9. A device for receiving downlink data, applied in a terminal, comprising:
a processor; and
a memory for storing instructions executable for the processor;
wherein the processor is configured to:
receive first downlink control information (DCI) that is carried on a first physical downlink control channel (PDCCH) and sent by a base station through n antenna panels, wherein the first DCI schedules a plurality of antenna panels of the base station to respectively send downlink data to the terminal, and n is a positive integer,
wherein a number of Control Resource Sets (CORESETs) that are used for sending PDCCHs and are preconfigured by the base station for the terminal is k, and PDCCHs sent by at least two of the k CORESETs are configured to be sent using different antenna panels, k being an integer greater than 1;
determine, according to the first DCI, at least one target receiving beam for receiving the downlink data; and
receive the downlink data using the at least one target receiving beam, wherein the processor is further configured to:
in response to the terminal being not able to determine the at least one target receiving beam according to the first DCI, receive the downlink data using at least one default receiving beam,
wherein the at least one default receiving beam is at least one receiving beam used by the terminal to receive a second PDCCH, wherein the second PDCCH is a PDCCH, in a latest scheduling unit that receives a PDCCH which is from a same antenna panel as the first PDCCH from, sent by a CORESET with a minimum number in at least one CORESET sent by the same antenna panel.
10. The device of claim 9 , wherein the processor is further configured to:
determine, according to a plurality of transmission configuration indication (TCI) states carried in the first DCI, receiving beams corresponding to one of the plurality of TCI states as the at least one target receiving beam.
11. The device of claim 9 , wherein a number of the at least one default receiving beam is one or more.
12. The device of claim 9 ,
wherein the processor is further configured to:
receive CORESET configuration information sent by the base station, wherein the CORESET configuration information comprises identification information of antenna panels for sending PDCCH using CORESET.