Patent ID: 9544801
Date: 2017-01-10
CPC Classifications: H04B,H04L,H04N,H04W,Y02D

Claim:
1. A user equipment (UE) operable to report periodic channel state information (CSI) configured in a specified transmission mode (TM), having computer circuitry configured to: generate, at the UE, a plurality of CSI reports for serving cells for transmission in a subframe for a plurality of CSI processes for the UE operating in the specified TM used in a coordinated multipoint (CoMP) operation and carrier aggregation (CA) configuration, each of the CSI processes include a respective configuration of a channel and a corresponding interference part, wherein each CSI report corresponds to a physical uplink control channel (PUCCH) reporting type among a plurality of PUCCH reporting types, a CSI process among a plurality of CSI processes having a CSI process index (CSIProcessIndex) and a serving cell index (ServCellIndex) among a plurality of ServCellIndexes; determine different priorities corresponding to each of the plurality of PUCCH reporting types; determine a first collision between CSI reports, among the plurality of CSI reports, having PUCCH reporting types with equal priorities in the subframe and, upon determining the first collision, drop CSI reports corresponding to all CSI processes except a CSI process having the lowest CSIProcessIndex, wherein a CSI report for a specific ServCellIndex with a lower CSIProcessIndex has a higher priority than a CSI report for the specific ServCellIndex with a CSIProcessIndex higher than the lower CSIProcessIndex; determine a second collision between CSI reports, after determining the first collision, among retained ones of the plurality of CSI reports, having CSIProcessIndexes with equal priorities in the subframe and, upon determining the second collision, drop CSI reports corresponding to all ServCellIndexes except a CSI report with the lowest ServCellIndex, wherein a CSI report for a specific CSIProcessIndex with a lower ServCellIndex has a higher priority than a CSI report for the specific CSIProcessIndex with a ServCellIndex that is higher than the lower ServCellIndex; and prepare at least one non-colliding CSI report from among CSI reports that are not dropped; multiplex a hybrid automatic repeat request-acknowledgement (HARQ-ACK) and the at least one non-colliding CSI report; determine whether the at least one non-colliding CSI report with HARQ-ACK feedback bits and any scheduling request (SR) fits into a payload of the PUCCH format 3; transmit the HARQ-ACK feedback bits including any SR without the at least one non-colliding CSI report when the at least one non-colliding CSI report with HARQ-ACK feedback bits and any SR does not fit into the payload; and transmit the multiplexed HARQ-ACK feedback bits including any SR with the at least one non-colliding CSI report when the at least one non-colliding CSI report with HARQ-ACK feedback bits and any SR fits into the payload.