Method and apparatus for configuring frame in wireless communication system including relay station

• US 9,014,067 B2
• Filed: 04/21/2011
• Issued: 04/21/2015
• Est. Priority Date: 04/21/2010
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Jin Young, Kwak, Jin Sam, Choi, Jin Soo, Ihm, Bin Chul, Lee, Wook Bong
• Primary Examiner(s): Chung, Hoon J
• Assistant Examiner(s): HAILE, FEBEN
• Application Number:
  US13/642,092
• Publication Number:
  US 20130034030A1
• Time in Patent Office: 1,461 Days
• Field of Search: 370/276, 370/277, 370/279, 370/281, 370/293, 370/295, 370/315, 370/328, 370/329, 370/330, 370/343, 370/344, 370/480
• US Class Current: 370/281
• CPC Class Codes: H04B 7/15542 Selecting at relay station its transmit and receive resources selection of wireless resources by user or terminal H04W72/02; arrangements affording multiple use of the transmission path by two-dimensional division of the resources H04L5/0003, or by allocating sub-channels H04L5/003
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04L 5/143 for modulated signals H04L5/1469 takes precedence
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A method and apparatus of communicating by a relay station a wireless communication system including a relay station is provided. The method include communicating with at least one of a base station and a user equipment through a frequency division duplex (FDD) uplink (UL) frame configured by the base station, the FDD UL frame including a UL relay zone including a plurality of UL subframes and a UL access zone including a plurality of UL subframes. The UL relay zone is a sector used for the relay station to transmit a signal to the base station, and the UL access zone is a sector used for the relay station to receive a signal from the user equipment. The UL relay zone is located before the UL access zone within the FDD UL frame.

Claims

1. A method of communicating by a relay station a wireless communication system including a relay station, the method comprising:

communicating with at least one of a base station and a user equipment through a frequency division duplex (FDD) frame, which includes a FDD downlink (DL) frame and a FDD UL frame, configured by the base station,

wherein the FDD DL frame includes a DL relay zone including a plurality of DL subframes, which is used to receive from the base station, and a DL access zone including a plurality of DL subframes, which is used to transmit to the user equipment,

wherein the FDD UL frame includes a UL relay zone including a plurality of UL subframes, which is used to transmit to the base station, and a UL access zone including a plurality of UL subframes, which is used to receive from the user equipment,

wherein a position of the DL access zone precedes a position of the DL relay zone within the FDD DL frame,

wherein a position of the UL relay zone precedes a position of the UL access zone within the FDD UL frame, and

wherein if a relay receive to transmit transition interval (R-RTI) is inserted, the R-RTI being an interval during which the relay station transitions from a reception mode to a transmission mode, the R-RTI is inserted in a last orthogonal frequency division multiple access (OFDMA) symbol of a last DL subframe included in the DL relay zone and a first OFDMA symbol of a first UL subframe included in the UL relay zone.

2. The method of claim 1, wherein the plurality of UL subframes included in the UL access zone are four in number if a number of subframes included in the FDD UL frame is eight.

3. The method of claim 1, wherein the plurality of DL subframes included in the DL access zone are four in number if a number of subframes included in the FDD DL frame is eight.

4. The method of claim 1, wherein a Relay Transmit to receive Transition Interval (R-TTI), which is a transition gap for which a transmission mode of the relay station changes to a reception mode, is inserted in the UL relay zone.

5. The method of claim 4, wherein the R-TTI is inserted in position of a last OFDMA symbol of a last UL subframe of the plurality of UL subframes included in the UL relay zone.

6. A method of performing a Hybrid Automatic Repeat request (HARQ) by a mobile station in a wireless communication system including a relay station, the method comprising:

receiving an Uplink (UL) assignment A-MAP Information Element (IE) from the relay station through a first downlink (DL) access zone within a first frequency division duplex (FDD) downlink (DL) frame, wherein the first FDD DL frame includes the first DL access zone including a plurality of DL subframes, which is used to receive the UL assignment A-MAP IE from the relay station, and a first DL relay zone including a plurality of DL subframes, and wherein a position of the first DL access zone precedes a position of the first DL relay zone within the first FDD DL frame;

transmitting a UL data burst, corresponding to the UL assignment A-MAP IE, to the relay station through a first UL access zone within a first FDD UL frame, wherein the first FDD UL frame includes the first UL access zone including a plurality of UL subframes, which is used to transmit the UL data burst to the relay station, and a first UL relay zone including a plurality of UL subframes, wherein a position of the first UL relay zone precedes a position of the first UL access zone within the first FDD UL frame, and wherein the first FDD DL frame and the first FDD UL frame constitute a first frame; and

receiving an Acknowledgement (ACK)/Non-acknowledgement (NACK) signal with respect to the UL data burst, from the relay station through a second DL access zone within a second FDD DL frame contiguous to the first FDD DL frame, wherein the second FDD DL frame includes the second DL access zone including a plurality of DL subframes, which is used to receive the ACK/NACK signal from the relay station, and a second DL relay zone including a plurality of DL subframes, and wherein a position of the second DL access zone precedes a position of the second DL relay zone within the second FDD DL frame,

wherein a second FDD UL frame includes a second UL access zone including a plurality of UL subframes and a second UL relay zone including a plurality of UL subframes, wherein a position of the second UL relay zone precedes a position of the second UL access zone within the second FDD UL frame, and wherein the second FDD DL frame and the second FDD UL frame constitute a second frame, and

wherein if a relay receive to transmit transition interval (R-RTI) is inserted, the R-RTI being an interval during which the relay station transitions from a reception mode to a transmission mode, the R-RTI is inserted in a last orthogonal frequency division multiple access (OFDMA) symbol of a last DL subframe included in the DL relay zone and a first OFDMA symbol of a first UL subframe included in the UL relay zone.

7. The method of claim 6, wherein the plurality of UL subframes included in the first UL access zone or the second UL access zone are four in number if a number of subframes included in the first FDD UL frame or the second FDD UL frame is eight.

8. The method of claim 6, wherein the plurality of DL subframes included in the first DL access zone or the second DL access zone are four in number if a number of subframes included in the first FDD DL frame or the second FDD DL frame is eight.

9. The method of claim 6, wherein a Relay Transmit to receive Transition Interval (R-TTI), which is a transition gap for which a transmission mode of the relay station changes to a reception mode, is inserted in the first UL relay zone and the second UL relay zone.

10. A user equipment in a wireless communication system including a relay station, the user equipment comprising:

a radio frequency (RF) unit configured to transmit or receive a radio signal, and

a processor, coupled to the RF unit, and configure to;

receive an Uplink (UL) assignment A-MAP Information Element (IE) from the relay station through a first Downlink (DL) access zone within a first frequency division duplex (FDD) downlink (DL) frame, wherein the first FDD DL frame includes the first DL access zone including a plurality of DL subframes, which is used to receive the UL assignment A-MAP IE from the relay station, and a first DL relay zone including a plurality of DL subframes, and wherein a position of the first DL access zone precedes a position of the first DL relay zone within the first FDD DL frame,

transmit a UL data burst, corresponding to the UL assignment A-MAP IE, to the relay station through a first UL access zone within a first FDD UL frame, wherein the first FDD UL frame includes the first UL access zone including a plurality of UL subframes, which is used to transmit the UL data burst to the relay station, and a first UL relay zone including a plurality of UL subframes, wherein a position of the first UL relay zone precedes a position of the first UL access zone within the first FDD UL frame, and wherein the first FDD DL frame and the first FDD UL frame constitute a first frame, and

receive an Acknowledgement (ACK)/Non-acknowledgement (NACK) signal with respect to the UL data burst from the relay station through a second DL access zone within a second FDD DL frame contiguous to the first FDD DL frame, wherein the second FDD DL frame includes the second DL access zone including a plurality of DL subframes, which is used to receive the ACK/NACK signal from the relay station, and a second DL relay zone including a plurality of DL subframes, and wherein a position of the second DL access zone precedes a position of the second DL relay zone within the second FDD DL frame,

wherein a second FDD UL frame includes a second UL access zone including a plurality of UL subframes and a second UL relay zone including a plurality of UL subframes, wherein a position of the second UL relay zone precedes a position of the second UL access zone within the second FDD UL frame, and wherein the second FDD DL frame and the second FDD UL frame constitute a second frame, and

wherein if a relay receive to transmit transition interval (R-RTI) is inserted, the R-RTI being an interval during which the relay station transitions from a reception mode to a transmission mode, the R-RTI is inserted in a last orthogonal frequency division multiple access (OFDMA) symbol of a last DL subframe included in the DL relay zone and a first OFDMA symbol of a first UL subframe included in the UL relay zone.