US-20260129651-A1 - BEAM INDICATION METHOD, NETWORK SIDE DEVICE, AND TERMINAL

US20260129651A1US 20260129651 A1US20260129651 A1US 20260129651A1US-20260129651-A1

Abstract

A beam indication method includes: receiving first DCI or a first MAC CE. The first DCI or the first MAC CE is used to indicate at least one piece of common beam information.

Inventors

Yu Yang

Assignees

VIVO MOBILE COMMUNICATION CO., LTD.

Dates

Publication Date: 20260507
Application Date: 20251230
Priority Date: 20200930

Claims (19)

1 . A beam indication method, performed by a network-side device and comprising: transmitting first downlink control information (DCI) or a first medium access control control element (MAC CE), wherein the first DCI or the first MAC CE is used to indicate at least one piece of common beam information; wherein the common beam information corresponds to at least two channels, or the common beam information corresponds to at least two reference signals, or the common beam information corresponds to at least one channel and at least one reference signal; wherein the common beam information indicated by the first DCI or the first MAC CE is applicable to any one of following: a first-type control resource set; and a first-type control resource set and a channel or reference signal associated with the first-type control resource set; wherein the method further comprising: indicating beam information of a second-type control resource set through a second MAC CE.
2 . The method according to claim 1 , wherein the channel or reference signal associated with the first-type control resource set comprises at least one of following: a channel or reference signal scheduled by DCI in the first-type control resource set; and a feedback channel corresponding to a channel scheduled by DCI in the first-type control resource set.
3 . The method according to claim 1 , wherein a control resource set in which the first DCI is located belongs to the first-type control resource set.
4 . The method according to claim 1 , wherein the transmitting first DCI comprises: transmitting a downlink control channel in a second-type control resource set, wherein the downlink control channel comprises the first DCI; wherein target beam information is indicated by using a piece of DCI before the first DCI, wherein the target beam information is beam information of the second-type control resource set and a channel or reference signal associated with the second-type control resource set.
5 . The method according to claim 1 , wherein after the transmitting first DCI or a first MAC CE, the method further comprises: receiving first feedback information transmitted by a terminal, wherein the first feedback information is used to indicate whether the terminal has correctly received the first DCI or the first MAC CE.
6 . The method according to claim 5 , further comprising: determining an uplink resource for the first feedback information in a first manner, wherein the first manner comprises at least one of: determining the uplink resource for the first feedback information based on an uplink resource that is for the first feedback information and indicated in the first DCI or the first MAC CE; determining, based on a downlink resource in which the first DCI or the first MAC CE is located and an association relationship between uplink and downlink resources, that an uplink resource associated with the downlink resource in which the first DCI or the first MAC CE is located is the uplink resource for the first feedback information; or determining, based on a transmission time of the first DCI or the first MAC CE and a preset timing relationship, that an uplink resource satisfying the preset timing relationship with the transmission time of the first DCI or the first MAC CE is the uplink resource for the first feedback information.
7 . The method according to claim 5 , wherein in a case that the first DCI is further used to schedule a physical downlink shared channel (PDSCH), the method further comprises: receiving feedback information about the PDSCH; wherein the first feedback information and the feedback information about the PDSCH are jointly indicated in first target feedback information; or the first feedback information and the feedback information about the PDSCH are separately indicated in second target feedback information.
8 . The method according to claim 5 , wherein in a case that the first DCI is further used to schedule a physical uplink shared channel (PUSCH), an uplink resource in which the first feedback information is located comprises at least one of following: the PUSCH scheduled by the first DCI; a PUSCH scheduled by second DCI, wherein the PUSCH scheduled by the second DCI and the PUSCH scheduled by the first DCI use a same hybrid automatic repeat request (HARQ) process number; first available uplink resource after the PUSCH scheduled by the first DCI; or first available uplink resource after the first DCI.
9 . The method according to claim 5 , further comprising at least one of: in a case that the first feedback information is an acknowledgement, after first preset duration from a transmission time of the first feedback information, using the common beam information for a channel or reference signal corresponding to the common beam information; or in a case that the first DCI is further used to schedule a physical uplink shared channel PUSCH, after second preset duration from a transmission time of second DCI, using the common beam information for a channel or reference signal corresponding to the common beam information, wherein a PUSCH scheduled by the second DCI and the PUSCH scheduled by the first DCI have a same hybrid automatic repeat request (HARQ) process number.
10 . The method according to claim 9 , wherein in a case that a transmission time of a channel or reference signal scheduled by third DCI precedes a time at which the common beam information becomes usable, the method further comprises: transmitting, by using first default beam information, the channel or reference signal scheduled by the third DCI, wherein the first default beam information comprises: beam information corresponding to the transmission time of the channel or reference signal scheduled by the third DCI; or beam information of a control resource set with a smallest identifier (ID).
11 . The method according to claim 9 , wherein in a case that a transmission time of fourth DCI precedes a time at which the common beam information becomes usable, and that a transmission time of a channel or reference signal scheduled by the fourth DCI follows the time at which the common beam information becomes usable, the method further comprises: transmitting, by using second default beam information, the channel or reference signal scheduled by the fourth DCI, wherein the second default beam information comprises: beam information corresponding to the transmission time of the fourth DCI; beam information of a control resource set with a smallest identifier (ID); and the common beam information indicated by the first DCI or the first MAC CE.
12 . The method according to claim 5 , further comprising: in a case that the first feedback information is an acknowledgement, transmitting a corresponding channel or reference signal by using the common beam information; or in a case that the first feedback information is a negative acknowledgement, retransmitting the first DCI or the first MAC CE indicating the at least one piece of common beam information.
13 . The method according to claim 7 , wherein in a case that the first feedback information and the feedback information about the PDSCH are jointly indicated in the first target feedback information, if the first target feedback information is an acknowledgement, both the first feedback information and the feedback information about the PDSCH are acknowledgements; or if the first target feedback information is a negative acknowledgement, at least one of the first feedback information and the feedback information about the PDSCH is a negative acknowledgement.
14 . The method according to claim 7 , wherein in a case that the first feedback information and the feedback information about the PDSCH are separately indicated in the second target feedback information, the second target feedback information further comprises first indication information, wherein the first indication information is used to indicate that the second target feedback information comprises the first feedback information or the feedback information about the PDSCH; or the second target feedback information further comprises second indication information, wherein the second indication information is used to indicate an arrangement order or position information of the first feedback information in the second target feedback information and the feedback information about the PDSCH in the second target feedback information; or at least one of an uplink resource, timing information, a scrambling mode, a time-frequency domain offset, or a code division mode respectively used by the first feedback information and the feedback information about the PDSCH indicates that the second target feedback information comprises the first feedback information or the feedback information about the PDSCH; or in the second target feedback information, the first feedback information and the feedback information about the PDSCH are separately encoded and arranged according to a preset rule; or in the second target feedback information, the first feedback information and the feedback information about the PDSCH are jointly encoded, wherein a decoding result of joint encoding is able to indicate the first feedback information and the feedback information about the PDSCH that are comprised in the second target feedback information.
15 . The method according to claim 5 , wherein the receiving first feedback information transmitted by a terminal comprises: receiving the first feedback information transmitted by the terminal by using current beam information, until the common beam information becomes usable; or receiving the first feedback information transmitted by the terminal by using the common beam information.
16 . The method according to claim 1 , wherein in a case that the first DCI is further used to schedule a physical downlink shared channel (PDSCH), the method further comprises: retransmitting the first DCI indicating the at least one piece of common beam information; or retransmitting the PDSCH until number of times that no feedback information about the PDSCH is received or number of times that negative acknowledgement feedback information about the PDSCH is received reaches first preset number of times, and retransmitting the first DCI indicating the at least one piece of common beam information.
17 . The method according to claim 8 , wherein in a case that the first DCI is further used to schedule the PUSCH, the method further comprises: in a case that the PUSCH scheduled by the first DCI is not received, or the first feedback information is not received on the uplink resource in which the first feedback information is located, or the first feedback information being a negative acknowledgement is received, retransmitting the first DCI indicating the at least one piece of common beam information.
18 . A network-side device, comprising: a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, cause the network-side device to perform: transmitting first downlink control information (DCI) or a first medium access control control element (MAC CE), wherein the first DCI or the first MAC CE is used to indicate at least one piece of common beam information; wherein the common beam information corresponds to at least two channels, or the common beam information corresponds to at least two reference signals, or the common beam information corresponds to at least one channel and at least one reference signal; wherein the common beam information indicated by the first DCI or the first MAC CE is applicable to any one of following: a first-type control resource set; and a first-type control resource set and a channel or reference signal associated with the first-type control resource set; wherein the program or instructions, when executed by the processor, cause the network-side device further to perform: indicating beam information of a second-type control resource set through a second MAC CE.
19 . A terminal, comprising: a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein when the program or instructions, when executed by the processor, cause the terminal to perform: receiving first downlink control information (DCI) or a first medium access control control element (MAC CE), wherein the first DCI or the first MAC CE is used to indicate at least one piece of common beam information; wherein the common beam information corresponds to at least two channels, or the common beam information corresponds to at least two reference signals, or the common beam information corresponds to at least one channel and at least one reference signal; wherein the common beam information indicated by the first DCI or the first MAC CE is applicable to any one of following: a first-type control resource set; and a first-type control resource set and a channel or reference signal associated with the first-type control resource set; wherein the program or instructions, when executed by the processor, cause the terminal further to perform: determining beam information of a second-type control resource set based on a second MAC CE.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a Continuation Application of U.S. application Ser. No. 18/192,877 filed on Mar. 30, 2023, which is a Bypass Continuation Application of PCT/CN2021/121838 filed on Sep. 29, 2021, which claims priority to Chinese Patent Application No. 202011066307.3 filed on Sep. 30, 2020, which are incorporated herein by reference in their entirety. TECHNICAL FIELD This application pertains to the field of communications technologies, and in particular, relates to a beam indication method and apparatus, a network-side device, and a terminal. BACKGROUND Analog beamforming features full-band transmission, and array elements in each polarization direction on a panel of each high-frequency antenna array can transmit only analog beams in a time division multiplexing mode. A beamforming weight for each analog beam is implemented by adjusting parameters of radio frequency front-end devices such as a phase shifter. SUMMARY According to a first aspect, an embodiment of this application provides a beam indication method, applied to a network-side device. The method includes: transmitting first downlink control information (DCI) or a first medium access control control element (MAC CE), where the first DCI or the first MAC CE is used to indicate at least one piece of common beam information, where the common beam information corresponds to at least two channels, or the common beam information corresponds to at least two reference signals, or the common beam information corresponds to at least one channel and at least one reference signal. According to a second aspect, an embodiment of this application provides a beam indication method, applied to a terminal. The method includes: receiving first downlink control information (DCI) or a first medium access control control element (MAC CE), where the first DCI or the first MAC CE is used to indicate at least one piece of common beam information, where the common beam information corresponds to at least two channels, or the common beam information corresponds to at least two reference signals, or the common beam information corresponds to at least one channel and at least one reference signal. According to a third aspect, an embodiment of this application provides a beam indication apparatus, applied to a network-side device. The apparatus includes: a transmitting module, configured to transmit first downlink control information (DCI) or a first medium access control control element (MAC CE), where the first DCI or the first MAC CE is used to indicate at least one piece of common beam information, where the common beam information corresponds to at least two channels, or the common beam information corresponds to at least two reference signals, or the common beam information corresponds to at least one channel and at least one reference signal. According to a fourth aspect, an embodiment of this application provides a beam indication apparatus, applied to a terminal. The apparatus includes: a receiving module, configured to receive first downlink control information (DCI) or a first medium access control control element (MAC CE), where the first DCI or the first MAC CE is used to indicate at least one piece of common beam information, where the common beam information corresponds to at least two channels, or the common beam information corresponds to at least two reference signals, or the common beam information corresponds to at least one channel and at least one reference signal. According to a fifth aspect, an embodiment of this application provides a network-side device. The network-side device includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor. When the program or instructions are executed by the processor, the step of the method according to the first aspect is implemented. According to a sixth aspect, an embodiment of this application provides a terminal. The terminal includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor. When the program or instructions are executed by the processor, the step of the method according to the second aspect is implemented. According to a seventh aspect, an embodiment of this application provides a non-transitory computer-readable storage medium. The non-transitory computer-readable storage medium stores a program or instructions. When the program or instructions are executed by a processor, the step of the method according to the first aspect is implemented, or the step of the method according to the second aspect is implemented. According to an eighth aspect, an embodiment of this application provides a chip. The chip includes a processor and a communications interface. The communications interface is coupled to the processor. The processor is configured to execute a program or instructions to implement the method according to the first aspect or implement the method a