Channel information determining method, network device, and terminal device
A channel information determining method, a network device, and a terminal device are provided. The method includes: updating, activating, or indicating parameter information of a first channel or a first reference signal RS by using a media access control MAC control element CE command, where the parameter information of the first channel or the first reference signal RS is used for determining the parameter information of a second channel or a second RS under a preset condition; and the parameter information includes at least one of transmission configuration indicator TCI state information, spatial relation information, and path loss PL RS.
1. A channel information determining method, comprising:
determining, by a terminal device, parameter information of a second channel or a second RS under a preset condition, based on parameter information of a first channel or a first RS, wherein the parameter information of the first channel or the first RS is updated, activated, or indicated by a network device by using a MAC CE command; wherein
the parameter information comprises spatial relation information; and
the preset condition comprises that at least one PUCCH resource group has been configured on at least one BWP;
wherein PUCCH resources of each PUCCH resource group are located in a same BWP; and
the determining, by a terminal device, parameter information of a second channel or a second RS under a preset condition, based on parameter information of a first channel or a first RS comprises:
if spatial relation information of the first channel that is updated, activated, or indicated by using the MAC CE command is first spatial relation information, determining, by the terminal device, that spatial relation information of the second channel is the first spatial relation information, wherein
in a case that the first channel comprises a first PUCCH resource of a first PUCCH resource group on a first BWP, or that the first channel comprises all PUCCH resources of the first PUCCH resource group on the first BWP, the second channel comprises all the PUCCH resources of the first PUCCH resource group.
2. The method according to claim 1 , wherein the parameter information comprises the spatial relation information, the preset condition further comprises that a plurality of SRS resources have been configured in a multi-CC scenario, and the SRS resources are semi-persistent or aperiodic SRS resources; and
the determining, by a terminal device, parameter information of a second channel or a second RS under a preset condition, based on parameter information of a first channel or a first RS comprises:
if spatial relation information of the first RS that is updated, activated, or indicated by using the MAC CE command is fourth spatial relation information, determining, by the terminal device, that spatial relation information of the second RS is the fourth spatial relation information, wherein
in a case that the first RS comprises a first SRS resource on a fourth BWP of a third CC in a third CC list, the second RS comprises all SRS resources that have a same resource identifier as the first SRS resource and that are on all BWPs of at least one CC in the third CC list; or
in a case that the first RS comprises SRS resources having a same second resource identifier on all BWPs of all CCs in the third CC list, the second RS comprises the SRS resources having the second resource identifier on all the BWPs of all the CCs in the third CC list; or
in a case that the first RS comprises all SRS resources on all the BWPs of all the CCs in the third CC list, the second RS comprises all the SRS resources on all the BWPs of all the CCs in the third CC list; wherein
a parameter usage of an SRS resource set to which the first SRS resource belongs is configured to be codebook, nonCodebook, or antennaSwitching.
3. The method according to claim 1 , wherein the parameter information further comprises the PL RS, and the preset condition further comprises that no PL RS for a PUCCH or an SRS resource set has been configured; and
the determining, by a terminal device, parameter information of a second channel or a second RS under a preset condition, based on parameter information of a first channel or a first RS comprises:
determining, by the terminal device, a PL RS of the second channel or the second RS to be a DL RS out of a plurality of downlink DL RSs that is indicated by using the MAC CE command; wherein
the first channel comprises a PUCCH, or the first RS comprises an SRS resource set;
the second channel comprises the PUCCH, or the second RS comprises the SRS resource set; and
the plurality of DL RSs comprise at least one of the following: a DL RS in spatial relation information of the PUCCH or an SRS resource in the SRS resource set, a DL RS associated with spatial relation information of the PUCCH or an SRS resource in the SRS resource set, and a DL RS in TCI state information of a preset downlink channel; wherein the preset downlink channel is a downlink channel determined according to a preset rule.
4. The method according to claim 1 , wherein the second channel is an uplink channel or the second RS is an uplink RS, the parameter information is the spatial relation information, and each CC in the CC list is a CC having an uplink; and
the CC having an uplink comprises at least one of the following:
a CC having an uplink slot and/or uplink symbol that is configured by using RRC signaling;
a CC having an uplink slot and/or uplink symbol that is indicated by downlink control information DCI; and
a CC that is configured by using RRC signaling to be between a first parameter and a second parameter and that is indicated by DCI to be a CC with an uplink slot and/or uplink symbol, wherein the first parameter comprises a downlink slot and/or a downlink symbol, and the second parameter comprises an uplink slot and/or an uplink symbol.
5. The method according to claim 1 , wherein the second channel comprises a first associated channel, or the second RS comprises a first associated RS;
the preset condition further comprises a multi-TRP scenario, and the MAC CE command carries CORESET information and/or TRP information; and
the determining, by a terminal device, parameter information of a second channel or a second RS under a preset condition, based on parameter information of a first channel or a first RS comprises:
determining, by the terminal device, parameter information of the first associated channel or the first associated RS as the parameter information of the first channel or the first RS; wherein
the first associated channel comprises at least one of the following: a channel corresponding to the CORESET information, a channel corresponding to a TRP that is associated with the CORESET information, and a channel corresponding to a TRP that is corresponding to the TRP information; and
the first associated RS comprises at least one of the following: an RS corresponding to the CORESET information, an RS corresponding to a TRP that is associated with the CORESET information, and an RS corresponding to a TRP that is corresponding to the TRP information.
6. The method according to claim 5 , wherein the CORESET information and/or TRP information is used to indicate a TRP corresponding to the first channel or the first RS; or the CORESET information and/or TRP information is used to indicate a TRP corresponding to the second channel or the second RS.
7. The method according to claim 5 , wherein the first channel and the first associated channel correspond to same CORESET information and/or TRP information; and the first RS and the first associated RS correspond to same CORESET information and/or TRP information.
8. The method according to claim 1 , further comprising:
receiving, from the network device, radio resource control RRC signaling;
wherein the RRC signaling is used to configure at least one common CC list for uplink UL and downlink DL.
9. The method according to claim 8 , wherein the CCs in the at least one common CC list are located in a same band or different bands.
10. A network device, comprising:
a memory, storing a computer program instruction; and
a processor, wherein when the computer program instruction is executed by the processor, a channel information determining method is implemented, wherein the method comprises:
updating, activating, or indicating, by the network device, parameter information of a first channel or a first reference signal RS by using a media access control control element MAC CE command, wherein the parameter information of the first channel or the first reference signal RS is used for determining the parameter information of a second channel or a second RS under a preset condition; wherein
the parameter information comprises spatial relation information; and
the preset condition comprises that at least one physical uplink control channel PUCCH resource group has been configured on at least one bandwidth part BWP;
wherein the first channel comprises a first PUCCH resource of a first PUCCH resource group on a first BWP, or the first channel comprises all PUCCH resources of the first PUCCH resource group on the first BWP;
PUCCH resources of each PUCCH resource group are located in a same bandwidth part BWP; and
the updating, activating, or indicating parameter information of a first channel or a first reference signal RS by using a media access control MAC control element CE command comprises:
updating, activating, or indicating spatial relation information of the first channel as first spatial relation information by using the MAC CE command.
11. The network device according to claim 10 , wherein the first RS comprises a first SRS resource on a fourth BWP of a third CC in a third CC list, or the first RS comprises SRS resources having a same second resource identifier on all BWPs of all CCs in the third CC list, or the first RS comprises all SRS resources on all the BWPs of all the CCs in the third CC list;
the parameter information comprises the spatial relation information, the preset condition further comprises that a plurality of SRS resources have been configured in a multi-CC scenario, and the SRS resources are semi-persistent or aperiodic SRS resources; and
the updating, activating, or indicating parameter information of a first channel or a first RS by using a MAC CE command comprises:
updating, activating, or indicating, by the network device, spatial relation information of the first RS as fourth spatial relation information by using the MAC CE command, wherein
a parameter usage of an SRS resource set to which the first SRS resource belongs is configured to be codebook, noncodebook, or antenna switching.
12. The network device according to claim 10 , wherein the first channel comprises a second PUCCH resource on a second BWP of a first CC in a first CC list, or the first channel comprises PUCCH resources having a same first resource identifier on all BWPs of all CCs in the first CC list, or the first channel comprises all PUCCH resources on all the BWPs of all the CCs in the first CC list;
the parameter information comprises the spatial relation information, and the preset condition further comprises that a plurality of PUCCH resources have been configured in a multi-CC scenario; and
the updating, activating, or indicating parameter information of a first channel or a first RS by using a MAC CE command comprises:
updating, activating, or indicating, by the network device, spatial relation information of the first channel as second spatial relation information by using the MAC CE command.
13. The network device according to claim 10 , wherein the first channel comprises all PUCCH resources of a second PUCCH resource group on a third BWP of a second CC in a second CC list, or the first channel comprises all PUCCH resources of PUCCH resource groups having a same first resource group identifier on all BWPs of all CCs in the second CC list; or, the first channel comprises all PUCCH resources of all PUCCH resource groups on all the BWPs of all the CCs in the second CC list;
the parameter information comprises the spatial relation information, and the preset condition further comprises that a plurality of PUCCH resource groups have been configured in a multi-CC scenario; and
the updating, activating, or indicating parameter information of a first channel or a first RS by using a MAC CE command comprises:
updating, activating, or indicating, by the network device, spatial relation information of the first channel as third spatial relation information by using the MAC CE command.
14. The network device according to claim 10 , wherein the first channel comprises a physical upstream link control channel PUCCH, and the first RS comprises an SRS resource set;
the parameter information further comprises the PL RS, and the preset condition further comprises that no PL RS for a physical uplink control channel PUCCH or for an SRS resource set has been configured; and
the updating, activating, or indicating parameter information of a first channel or a first RS by using a MAC CE command comprises:
indicating, by the network device, one DL RS out of a plurality of downlink DL RSs by using the MAC CE command; wherein
the plurality of DL RSs comprise at least one of the following: a DL RS in spatial relation information of the PUCCH or an SRS resource in the SRS resource set, a DL RS associated with spatial relation information of the PUCCH or an SRS resource in the SRS resource set, and a DL RS in TCI state information of a preset downlink channel; wherein the preset downlink channel is a downlink channel determined according to a preset rule.
15. The network device according to claim 10 , wherein the preset condition further comprises a multi-TRP scenario; and the MAC CE command carries control resource set CORESET information and/or transmission and reception point TRP information.
16. The network device according to claim 15 , wherein the CORESET information and/or TRP information is used to indicate a TRP corresponding to the first channel or the first RS; or the CORESET information and/or TRP information is used to indicate a TRP corresponding to the second channel or the second RS.
17. The network device according to claim 10 , when the computer program instruction is executed by the processor, the following step may be further implemented:
Before updating, activating, or indicating parameter information of a first channel or a first reference signal RS by using a media access control MAC control element CE, configuring at least one common component carrier CC list for uplink and downlink by using radio resource control RRC signaling.
18. The network device according to claim 17 , wherein the CCs in the at least one common CC list are located in a same band or different band.
19. A terminal device, comprising:
a memory, storing a computer program instruction; and
a processor, wherein when the computer program instruction is executed by the processor, a channel information determining method is implemented, wherein the method comprises:
determining, by the terminal device, parameter information of a second channel or a second RS under a preset condition, based on parameter information of a first channel or a first RS, wherein the parameter information of the first channel or the first RS is updated, activated, or indicated by a network device by using a MAC CE command; wherein
the parameter information comprises spatial relation information; and
the preset condition comprises that at least one PUCCH resource group has been configured on at least one BWP;
wherein PUCCH resources of each PUCCH resource group are located in a same BWP; and
the determining, by a terminal device, parameter information of a second channel or a second RS under a preset condition, based on parameter information of a first channel or a first RS comprises:
if spatial relation information of the first channel that is updated, activated, or indicated by using the MAC CE command is first spatial relation information, determining, by the terminal device, that spatial relation information of the second channel is the first spatial relation information, wherein
in a case that the first channel comprises a first PUCCH resource of a first PUCCH resource group on a first BWP, or that the first channel comprises all PUCCH resources of the first PUCCH resource group on the first BWP, the second channel comprises all the PUCCH resources of the first PUCCH resource group.