Granted Patent B2

US 12,261,663 · App. 17/593,710 · Granted Mar 25, 2025

Inventors: Haitong Sun (Cupertino, CA); Chunxuan Ye (San Diego, CA); Dawei Zhang (Cupertino, CA); Hong He (Cupertino, CA); Jie Cui (Cupertino, CA); Seyed Ali Akbar Fakoorian (San Diego, CA); Sigen Ye (San Diego, CA); Wei Zeng (Cupertino, CA); Yushu Zhang (Beijing, CN)

Assignee: APPLE INC.

H04B7/0626H04B17/328H04B17/336

Abstract

Claims (50)

1. A method for a network node, comprising:

encoding a channel state information (CSI) reporting configuration communication for transmission to a user equipment (UE) that is in connected mode with both a first transmission and reception point (TRP) and a second TRP, the CSI reporting configuration communication including:

a first group of Channel Measurement Resource (CMR) resources for the first TRP; and

a second group of CMR resources for the second TRP, wherein the CSI reporting configuration communication comprises a single CMR set, and wherein the first group of CMR resources is a first subset within the single CMR set, and the second group of CMR resources is a second subset within the single CMR set;

decoding a CSI measurement communication received from the UE, the CSI measurement communication being based on the CSI reporting configuration communication, wherein the CSI measurement communication comprises a CSI-RS resource indicator (CRI), wherein

when the network node does not configure pairs of CMR resources, a bitwidth for the CRI for each pair of the pairs of CMR resources is ┌log 2 (N1×N2)┐, where N1 is a number of resources in the first group of CMR resources and N2 is a number of resources in the second group of CMR resources, and

when the network node does configure the pairs of CMR resources, the bitwidth for the CRI for each pair is ┌log 2 (M)┐, where M is a number of the pairs of CMR resources configured by the network node, wherein N1, N2, and M are positive integers; and

based on the CSI measurement communication, scheduling one or more downlink data transmissions.

2. The method of claim 1 , further comprising encoding a bitmap that indicates which resources of the single CMR set correspond to the first TRP, and which resources of the single CMR set correspond to the second TRP.

3. The method of claim 1 , further comprising encoding an integer with a value of N1, wherein the integer indicates that a first N1 resources of the single CMR set correspond to the first TRP and remaining resources of the single CMR set correspond to the second TRP.

4. The method of claim 1 wherein the CSI reporting configurations further comprises a first CMR set and a second CMR set, wherein the first CMR set comprises the first group of CMR resources, and the second CMR set comprises the second group of CMR resources.

5. The method of claim 1 , further comprising configuring pairs of CMR resources from the first group of CMR resources and the second group of CMR resources.

6. A method for a user equipment (UE), comprising:

decoding a channel state information (CSI) reporting configuration communication from a network node, the UE being in connected mode with both a first transmission and reception point (TRP) and a second TRP, the CSI reporting configuration communication including:

a first group of Channel Measurement Resource (CMR) resources for the first TRP; and

a second group of CMR resources for the second TRP;

performing one or more measurements based on the CSI reporting configuration communication; and

encoding a CSI measurement communication that includes information associated with the one or more performed measurements for transmission to the network node, wherein the CSI measurement communication comprises a CSI-Reference signal (RS) resource indicator (CRI), wherein

when the network node does not configure pairs of CMR resources, a bitwidth for the CRI for each pair of the pairs of CMR resources is ┌log 2 (N1×N2)┐, where N1 is a number of resources in the first group of CMR resources and N2 is a number of resources in the second group of CMR resources, and

when the network node does configure the pairs of CMR resources, the bitwidth for the CRI for each pair is ┌log 2 (M)┐, where M is a number of the pairs of CMR resources configured by the network node, wherein N1, N2, and M are positive integers.

7. The method of claim 6 , wherein the CSI reporting configuration indicates pairs of resources between the first group of CMR resources and the second group of CMR resources, wherein the one or more measurements correspond to the pairs of resources.

8. The method of claim 6 , wherein the CSI measurement communication comprises a group based signal-to-noise and interference ratio/reference signal received power (SINR/RSRP) report, the group based SINR/RSRP report including measurements for each pair of beams, wherein each RSRP/SINR measurement is reported independently in each pair of beams.

9. The method of claim 6 , wherein the CSI measurement communication comprises a group based signal-to-noise and interference ratio/reference signal received power (SINR/RSRP) report, wherein differential encoding is used for the group based SINR/RSRP report, wherein the method further comprises selecting and reporting an anchor reference signal (RS) that causes differential values to be positive or zero.

10. The method of claim 6 , wherein the CSI measurement communication comprises a group based signal-to-noise and interference ratio/reference signal received power (SINR/RSRP) report, wherein differential encoding is used for the group based SINR/RSRP report, wherein an anchor RS is fixed.

11. The method of claim 6 , wherein for group based signal-to-noise and interference ratio (SINR) reporting, for each pair of beams, the CSI measurement communication includes one or both of the following:

a first computed SINR for one beam in a pair that does not consider a second beam in the pair as interference, and

a second computed SINR for the one beam in the pair that considers the second beam in the pair as the interference.

12. A method for a user equipment (UE), comprising:

decoding a channel state information (CSI) reporting configuration communication from a network node, the UE being in connected mode with both a first transmission and reception point (TRP) and a second TRP, the CSI reporting configuration communication including:

a first group of Channel Measurement Resource (CMR) resources for the first TRP; and

a second group of CMR resources for the second TRP;

performing one or more measurements based on the CSI reporting configuration communication;

encoding a CSI measurement communication that includes information associated with the one or more performed measurements for transmission to the network node, wherein the CSI measurement communication comprises a CSI-Reference signal (RS) resource indicator (CRI), wherein the CSI measurement communication comprises a CSI-RS resource indicator (CRI), wherein

when the network node does not configure pairs of CMR resources, a bitwidth for the CRI for each pair of the pairs of CMR resources is ┌log 2 (N1×N2)┐, where N1 is a number of resources in the first group of CMR resources and N2 is a number of resources in the second group of CMR resources, and

when the network node does configure the pairs of CMR resources, the bitwidth for the CRI for each pair is ┌log 2 (M)┐, where M is a number of the pairs of CMR resources configured by the network node, wherein N1, N2, and M are positive integers;

receiving data via a pair of beams from the first TRP and the second TRP;

determining whether a connection to at least one of the pair of beams has failed, when a beam failure detection (BFD) resource has not been configured; and

monitoring one or more reference signals (RSs) used for Physical Downlink Control Channel (PDCCH) detection as one or more BFD RSs for beam failure monitoring.

13. The method of claim 12 , wherein an RS used for control resource sets (CORESETs) configured with CORESETPoolIndex=0 is associated with the first TRP, and wherein an RS used for CORESET configured with CORESETPoolIndex=1 is associated with the second TRP.

14. The method of claim 12 , wherein when a CORESET is configured with two transmission configuration indication (TCI) States:

a first RS configured is associated with the first TRP, and

a second RS configured is associated with the second TRP; and

wherein when the CORESET is configured with one TCI State, the CORESET is fixed to the first TRP or the network node configures which TRP the CORESET is associated with.

15. The method of claim 12 , further comprising dropping one or more BFD RSs based on a UE implementation in response to monitoring multiple RSs and a total number of the RSs exceeding UE capability.

16. The method of claim 12 , further comprising:

ranking the one or more BFD RSs based on search space monitoring periodicity, where a first BFD RS associated with a CORESET with a shorter periodicity has higher priority than a second BFD RS associated with a CORESET with a longer periodicity, wherein

in response to more than one CORESETs being associated with search spaces of a same monitoring periodicity, the BFD RSs are then ranked in decreasing order of CORESET index where a larger CORESET index has lower priority than a smaller CORESET index; and

dropping one or more beam failure detection reference signal (BFD RS) based on the ranking in response to a total number of the BFD RS exceeding UE capability.

17. The method of claim 16 , wherein to rank BFD RSs associated with different TRPs, the first TRP has higher priority compared to the second TRP.

18. The method of claim 16 , wherein for BFD RSs associated with different TRPs, dropping is performed independently for each TRP.

Assignments (1)

Continuity (1)

References Cited (12)