Hybrid automatic repeat request (HARQ) mapping for carrier aggregation (CA)

摘要

Technology to dynamically alter hybrid automatic retransmission re-quest (HARQ) mapping for carrier aggregation (CA) is disclosed. In an example, a user equipment (UE) operable to dynamically alter hybrid automatic retransmission re-quest (HARQ) mapping for carrier aggregation (CA) can include computer circuitry configured to: Determine a secondary HARQ bundling window size for a secondary cell (SCell), when a primary HARQ bundling window size for a primary cell (PCell) is zero; determine a physical uplink control channel (PUCCH) resource for transmission of a HARQ-ACKnowledge (ACK) feedback using the secondary HARQ bundling window size; and transmit the HARQ-ACK feedback in the PUCCH resource.

主权项

1. A user equipment (UE) operable to dynamically alter hybrid automatic retransmission re-quest (HARQ) mapping for carrier aggregation (CA), having computer circuitry configured to:
determine a secondary HARQ bundling window size for a subframe for a secondary cell (SCell) based on uplink-downlink (UL-DL) configuration of the SCell, wherein the secondary HARQ bundling window includes at least one of a number of downlink (DL) subframes or a previous radio frame, when a primary HARQ bundling window size for a primary cell (PCell) is zero; determine a physical uplink control channel (PUCCH) resource for transmission of a HARQ-ACKnowledge (ACK) feedback for a physical downlink shared channel (PDSCH) on the PCell and the SCell based on a number of a first Control Channel Element (CCE) used to construct a physical downlink control channel (PDCCH) for transmission of a corresponding PDSCH in the secondary HARQ bundling window of the SCell; and transmit the HARQ-ACK feedback in the determined PUCCH resource, wherein the PUCCH resource nPUCCH(1,{tilde over (p)}) for transmission of the HARQ-ACK in a subframe n for a {tilde over (p)} mapped to an antenna port p for a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard Release 11 PUCCH format 1a or 1b, is represented by:
nPUCCH,i(1,{tilde over (p)}0)=(M−m−1)·Nc+m·Nc+1+nCCE+NPUCCH(1) for antenna port p0 for time division duplex (TDD) when the secondary HARQ bundling window size Ms=1 and the primary HARQ bundling window size Mp=0, where a HARQ bundling window size M=Ms, nCCE is a number of a first CCE index used for transmission of a corresponding physical downlink control channel (PDCCH) in subframe n−km and the corresponding m, where km is the smallest value in set K such that UE detects a PDCCH in subframe n−km, Nc=max{0,└[NRBDL·(NscRB·c−4)]/36┘} where c is a value out of {0, 1, 2, 3} such that Nc≦nCCEnPUCCH,i(1,{tilde over (p)}1)=(M−m−1)·Nc+m·Nc+1+nCCE+1+NPUCCH(1) for antenna port p1 for time division duplex (TDD) when the secondary HARQ bundling window size Ms=1 and primary HARQ bundling window size Mp=0 and a two port transmission is configured.