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

Patent metadata

Field	Value
Publication number	US-9439095-B2
Application number	US-201313867020-A
Country	US
Kind code	B2
Filing date	Apr 19, 2013
Priority date	Sep 28, 2012
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

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.

First claim

What is claimed is:

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 n PUCCH (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:
n PUCCH,i (1,{tilde over (p)} 0 ) =(M−m−1)·N c +m·N c+1 +n CCE +N PUCCH (1) for antenna port p 0 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, n CCE is a number of a first CCE index used for transmission of a corresponding physical downlink control channel (PDCCH) in subframe n−k m and the corresponding m, where k m is the smallest value in set K such that UE detects a PDCCH in subframe n−k m ,

N c =max{0,└[N RB DL ·(N sc RB ·c−4)]/36┘} where c is a value out of {0, 1, 2, 3} such that N c ≦n CCE <N c+1 , N RB DL is a downlink bandwidth configuration, expressed in units of N sc RB , N sc RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N PUCCH (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
n PUCCH,i (1,{tilde over (p)} 1 ) =(M−m−1)·N c +m·N c+1 +n CCE +1+N PUCCH (1) for antenna port p 1 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.

2. The computer circuitry of claim 1 , wherein:
the PUCCH resource n PUCCH (1) for transmission of the HARQ-ACK in a subframe n for a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard Release 11 PUCCH format 1a or 1b, is represented by:
n PUCCH,i (1) =(M−i−1)·N c +i·N c+1 +N CCE,i +N PUCCH (1) for time division duplex (TDD) when the secondary HARQ bundling window size Ms>1 and the primary HARQ bundling window size Mp=0 for a physical downlink shared channel (PDSCH) transmission indicated by a detection of a corresponding physical downlink control channel (PDCCH) or a PDCCH indicating downlink semi-persistent scheduling (SPS) release in sub-frame n−k i on the SCell, where a HARQ bundling window size M=Ms, n CCE,i is a first CCE index number used for transmission of the corresponding physical downlink control channel (PDCCH) in subframe n−k i on the SCell, where k i εK and K is a set of M elements {k 0 , k 1 , . . . k M−1 } and 0≦i≦M s −1,

N c =max{0,└[N RB DL ·(N sc RB ·c−4)]/36┘} where c is a value out of {0, 1, 2, 3} such that N c ≦n CCE <N c+1 , N RB DL is a downlink bandwidth configuration, expressed in units of N sc RB , N sc RB is a resource block size in the frequency domain, expressed as a number of subcarriers, and N PUCCH (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
n PUCCH,i (1) where the value for n PUCCH,i (1) is determined according to higher layer signaling and a table for PUCCH resource value for downlink SPS when the secondary HARQ bundling window size Ms>1 and the primary HARQ bundling window size Mp=0 for the PDSCH transmission where there is not a corresponding PDCCH in subframe n−k i on the SCell.

3. The computer circuitry of claim 2 , wherein the HARQ-ACK feedback is represented as HARQ-ACK(i) and includes a combination of ACK, negative ACK (NACK), or discontinuous transmission (DTX) responses from sub-frame n−k i on the SCell, where k i εK and K is a set of M elements {k 0 , k 1 , . . . k M−1 } and 0≦i≦M s −1.

4. The computer circuitry of claim 1 , further configured to:
perform channel selection based on a HARQ bundling window size M=Ms, where Ms is the secondary HARQ bundling window size, wherein:
the computer circuitry uses a Table 10.1.3-5 in a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) standard Release 11 Technical Specification (TS) 36.213 when Ms=2;
the computer circuitry uses a Table 10.1.3-6 in the TS 36.213 when Ms=3; or
the computer circuitry uses a Table 10.1.3-7 in the TS 36.213 when Ms=4,

wherein the Table 10.1.3-5 in the TS 36.213 is:

HARQ-ACK(0), HARQ-ACK(1)
n PUCCH (1)
b(0)b(1)

ACK, ACK
n PUCCH,1 (1)
1, 0

ACK, NACK/DTX
n PUCCH,0 (1)
1, 1

NACK/DTX, ACK
n PUCCH,1 (1)
0, 1

NACK, NACK/DTX
n PUCCH,0 (1)
0, 0

DTX, NACK/DTX
No Transmission

the Table 10.1.3-6 in the TS 36.213 is:

HARQ-ACK(0), HARQ-ACK(1),

HARQ-ACK(2)
n PUCCH (1)
b(0)b(1)

ACK, ACK, ACK
n PUCCH,2 (1)
1, 1

ACK, ACK, NACK/DTX
n PUCCH,1 (1)
1, 0

ACK, NACK/DTX, ACK
n PUCCH,2 (1)
1, 0

ACK, NACK/DTX, NACK/DTX
n PUCCH,0 (1)
1, 1

NACK/DTX, ACK, ACK
n PUCCH,2 (1)
0, 1

NACK/DTX, ACK, NACK/DTX

Assignees

• Intel Corp

Inventors

• He Hong
• Han Seunghee
• Fwu Jong-Kae
• Huang Rui

Classifications

• H04W52/0261

  managing power supply demand, e.g. depending on battery level · CPC title

• H04W52/0258

  controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day · CPC title

• H04W52/0225

  using monitoring of external events, e.g. the presence of a signal · CPC title

• H04W52/0209

  in terminal devices · CPC title

• H04W52/0235

  where the received signal is a power saving command · CPC title