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

A method for hybrid automatic retransmission re-quest (HARQ) bundling used in carrier aggregation (CA) at a user equipment (UE), comprising:

• receiving, at the UE, an uplink-downlink (UL-DL) configuration for a primary cell (PCell) and an UL-DL configuration for a secondary cell (SCell);
• determining a secondary HARQ bundling window size for a subframe based on the UL-DL configuration for the SCell and a primary HARQ bundling window size for the subframe based on the UL-DL configuration for the PCell, wherein the secondary HARQ bundling window includes at least one of a number of downlink (DL) subframes or a previous radio frame;
• determining a physical uplink control channel (PUCCH) resource nPUCCH(1) for transmission of a HARQ-ACKnowledge (ACK) 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 using the secondary HARQ bundling window of the SCell;
• generating a HARQ-ACK for a physical downlink shared channel (PDSCH) of the SCell;
• and
• transmitting the HARQ-ACK in the determined PUCCH resource nPUCCH(1), wherein the PUCCH resource nPUCCH(1) 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≦nCCE<Nc+1, NRBDL is a downlink bandwidth configuration, expressed in units of NscRB, NscRB is a resource block size in the frequency domain, expressed as a number of subcarriers, and NPUCCH(1) is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE;
• and
• nPUCCH,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.

A device at a node configured to detect a hybrid automatic retransmission re-quest (HARQ) bundle used in carrier aggregation (CA), comprising:

• a transceiver to receive constellation bits in a physical uplink control channel (PUCCH) resource in a subframe transmitted in a primary cell (PCell) for a physical downlink shared channel (PDSCH) of a secondary cell (SCell), wherein the PUCCH resource is determined for transmission of a HARQ-ACKnowledge (ACK) response 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 a secondary HARQ bundling window of the SCell;
• and
• a processor to:
• determine the secondary HARQ bundling window size for a subframe based on an uplink-downlink (UL-DL) configuration for the SCell and a primary HARQ bundling window size for the subframe based on an UL-DL configuration for the PCell, wherein the secondary HARQ bundling window includes at least one of a number of downlink (DL) subframes or a previous radio frame, and
• determine a HARQ-ACKnowledge (ACK) response for the subframe for the SCell using the secondary HARQ bundling window size and the PUCCH resource, when the primary HARQ bundling window size is zero, 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≦nCCE<Nc+1, NRBDL is a downlink bandwidth configuration, expressed in units of NscRB, NscRB is a resource block size in the frequency domain, expressed as a number of subcarriers, and NPUCCH(1) is a starting PUCCH channel index for a PUCCH region in an uplink subframe and is configured by high layers for each UE;
• and
• nPUCCH,i(1,{tilde over (p)}1)=(M−m−1)·Nc+m·Nc+1+nCCE+1+NPUCCH(1) for antenna oport 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.