Method and apparatus for transmitting ACK/NACK for downlink transmission in wireless communication system

Patent metadata

Field	Value
Publication number	US-9295046-B2
Application number	US-201113879978-A
Country	US
Kind code	B2
Filing date	Nov 22, 2011
Priority date	Nov 22, 2010
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

A wireless communication system and a method and apparatus for transmitting ACK/NACK for downlink transmission in a wireless communication system are disclosed. The method for transmitting ACK/NACK information for a downlink transmission in a receiver of a wireless communication system includes being configured with N physical uplink control channel (PUCCH) resources respectively having indexes 0, 1, 2, . . . , and N−1 by a higher layer, receiving the downlink transmission from a transmitter in a downlink subframe set including M (1<M<N) downlink subframes, and transmitting the ACK/NACK information for the downlink transmission in the downlink subframe set to the transmitter in one uplink subframe associated with the downlink subframe set. Each of the M PUCCH resources respectively having the indexes 0, 1, 2, . . . , and M−1 among the N PUCCH resources configured with respect to the receiver corresponds to each of the M downlink subframes.

First claim

The invention claimed is:

1. A method for transmitting acknowledgment/negative acknowledgement (ACK/NACK) information in response to a downlink transmission in a relay node (RN) of a wireless communication system, the method comprising:
receiving, by the RN from a base station (BS), one or more relay physical downlink control channels (R-PDCCHs) transmitted for scheduling the downlink transmission;
receiving, by the RN from the BS, the downlink transmission according to the one or more R-PDCCHs in a downlink subframe set including M downlink subframes, where M is a positive integer greater than 1; and
transmitting, by the RN to the BS, the ACK/NACK information for the downlink transmission in the downlink subframe set in one uplink subframe associated with the downlink subframe set,
wherein the downlink subframe set and the uplink subframe are configured for a time division duplex (TDD),
wherein the one or more R-PDCCHs are control channels different from a physical downlink control channel (PDCCH),
wherein N physical uplink control channel (PUCCH) resources respectively having indexes 0, 1, 2, . . . , and N−1 are configured by a higher layer, where M≦N and N is a positive integer greater than 1,
wherein each of M PUCCH resources respectively having the indexes 0, 1, 2, . . . , and M−1 among the configured N PUCCH resources corresponds to each of the M downlink subframes, and
wherein each of the M downlink subframes associated with the one uplink subframe is sequentially mapped to each of the M PUCCH resources starting from a downlink subframe among the M downlink subframes that is closest in time to the one uplink subframe.

2. The method according to claim 1 , wherein:
the one uplink subframe is a subframe n,
the M downlink subframes are subframe n−k t , where t=0, 1, 2, . . . , and M−1, and t is a positive integer,
the M PUCCH resources are n (1) PUCCH,t , where t=0, 1, 2, . . . , M−1, and
n (1) PUCCH,t corresponds to the subframe n−k t .

3. The method according to claim 2 , wherein the k t value corresponds to t=0, 1, 2, . . . , M−1 in ascending order.

4. The method according to claim 1 , wherein the ACK/NACK information is transmitted using one of the M PUCCH resources.

5. A relay node (RN) for transmitting acknowledgment/negative acknowledgement (ACK/NACK) information in response to a downlink transmission in a wireless communication system, the RN comprising:
a plurality of antennas; and
a processor configured to:
support the transmitting ACK/NACK information by controlling the plurality of antennas,
receive, from a base station (BS) via the plurality of antennas, one or more relay physical downlink control channels (R-PDCCHs) transmitted for scheduling the downlink transmission,
receive, from the BS via the plurality of antennas, the downlink transmission according to the one or more R-PDCCHs in a downlink subframe set including M downlink subframes, where M is a positive integer greater than 1, and
transmit, to the BS via the plurality of antennas, the ACK/NACK information for downlink transmission in the downlink subframe set in one uplink subframe associated with the downlink subframe set,

wherein the downlink subframe set and the uplink subframe are configured for a time division duplex (TDD),
wherein the one or more R-PDCCHs are control channels different from a physical downlink control channel (PDCCH),
wherein N physical uplink control channel (PUCCH) resources respectively having indexes 0, 1, 2, . . . , and N−1 are configured by a higher layer, where M≦N and N is a positive integer greater than 1,
wherein each of M PUCCH resources respectively having the indexes 0, 1, 2, . . . , M−1 among the configured N PUCCH resources corresponds to each of the M downlink subframes, and
wherein each of the M downlink subframes associated with the one uplink subframe is sequentially mapped to each of the M PUCCH resources starting from a downlink subframe among the M downlink subframes that is closest in time to the one uplink subframe.

6. The RN according to claim 5 , wherein:
the one uplink subframe is a subframe n,
the M downlink subframes are subframe n−k t , where 1, 2, . . . , and M−1, and t is a positive integer,
the M PUCCH resources are n (1) PUCCH,t , where t=0, 1, 2, . . . , M−1, and
the n (1) PUCCH,t corresponds to the subframe n−k t .

7. The RN according to claim 6 , wherein the k t value corresponds to t=0, 1, 2, . . . , M−1 in ascending order.

8. The RN according to claim 5 , wherein the ACK/NACK information is transmitted using one of the M PUCCH resources.

Assignees

• Seo Hanbyul
• Yang Suckchel
• Kim Kijun
• Ahn Joonkui
• Lg Electronics Inc

Inventors

• Seo Hanbyul
• Yang Suckchel
• Kim Kijun
• Ahn Joonkui

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L1/1854 Primary

  Scheduling and prioritising arrangements · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L1/1861

  Physical mapping arrangements (for ACK signaling see also H04L5/0053) · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title