Method and apparatus for transmitting uplink control signal in relay station

• US 8,391,127 B2
• Filed: 09/15/2010
• Issued: 03/05/2013
• Est. Priority Date: 09/16/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Jin Young, Cho, Han Gyu, Lim, Dong Guk, Ihm, Bin Chul, Kwak, Jin Sam
• Primary Examiner(s): Rinehart, Mark
• Assistant Examiner(s): Cheng, Peter
• Application Number:
  US12/882,556
• Publication Number:
  US 20110064019A1
• Time in Patent Office: 902 Days
• Field of Search: 370/203, 370/208
• US Class Current: 370/203
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0058 Allocation criteria

Abstract

A method of transmitting an uplink (UL) control signal of a relay station is provided. The method includes: configuring a UL relay zone for transmitting a signal by the relay station to a base station in a frame; configuring a resource unit including a plurality of symbols and a plurality of subcarriers to allocate the UL control signal in a subframe of the UL relay zone; and transmitting the UL control signal by using the resource unit, wherein, if a transition gap required for switching of signal transmission and reception of the relay station is included in the subframe, the UL control signal is transmitted in the remaining symbols other than the plurality of symbols constituting the resource unit including the transition gap.

Claims

1. A method for transmitting an acknowledgement (ACK)/not-acknowledgement (NACK) signal of relay station, the method comprising:

determining a sequence corresponding to one of ACK signal and NACK signal;

mapping the sequence onto three Hybrid automatic repeat request Mini-Tiles (HMTs), each HMT comprising two orthogonal frequency division multiple access (OFDMA) symbols contiguous in time domain by two subcarriers contiguous in frequency domain, wherein the three HMTs are continuous in the time domain and discontinuous in the frequency domain;

determining whether a transition gap is inserted in at least one of a first OFDMA symbol and a last OFDMA symbol of the three HMTs;

when the transition gap is inserted in the first OFDMA symbol of the three HMTs, one HMT, among the three HMTs, in the first OFDMA symbol and a second OFDMA symbol is punctured, and when the transition gap is inserted in the last OFDMA symbol of the three HMTs, one HMT, among the three HMTs, in the last two OFDMA symbols is punctured; and

transmitting the mapped sequence to a base station,

wherein the sequence is an orthogonal sequence having a four bit size and the four bits of the orthogonal sequence are mapped to each of the three HMTs.

2. The method of claim 1, wherein the three HMTs are the same radio resources in which a mobile station transmits an ACK or NACK signal without puncturing to the base station.

3. The method of claim 1, wherein the transition gap is a time required for switching of signal transmission and reception of the relay station.

4. A relay station comprising:

a radio frequency (RF) unit for transmitting and receiving a radio signal; and

a processor coupled to the RF unit,

wherein the processor is configured for;

determining a sequence corresponding to one of ACK signal and NACK signal;

mapping the sequence onto three Hybrid automatic repeat request Mini-Tiles (HMTs), each HMT comprising two orthogonal frequency division multiple access (OFDMA) symbols contiguous in time domain by two subcarriers contiguous in frequency domain, wherein the three HMTs are continuous in the time domain and discontinuous in the frequency domain;

determining whether a transition gap is inserted in at least one of a first OFDMA symbol and a last OFDMA symbol of the three HMTs;

when the transition gap is inserted in the first OFDMA symbol of the three HMTs, one HMT, among the three HMTs in the first OFDMA symbol and a second OFDMA symbol is punctured, and when the transition gap is inserted in the last OFDMA symbol of the three HMTs, one HMT, among the three HMTs, in the last two OFDMA symbols is punctured; and

transmitting the mapped sequence to a base station,

wherein the sequence is an orthogonal sequence having a four bit size and the four bits of the orthogonal sequence are mapped to each of the three HMTs.

5. The relay station of claim 4, wherein the three HMTs are the same radio resources in which a mobile station transmits an ACK or NACK signal without puncturing to the base station.

6. The relay station of claim 4, wherein the transition gap is a time required for switching of signal transmission and reception of the relay station.