Method and apparatus for transmitting/receiving a control format indicator channel for a relay backhaul link in a wireless communication system

• US 8,792,327 B2
• Filed: 07/14/2010
• Issued: 07/29/2014
• Est. Priority Date: 07/14/2009
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, So Yeon, Cho, Han Gyu, Moon, Sung Ho, Kwon, Yeong Hyeon, Chung, Jae Hoon, Park, Gyu Jin
• Primary Examiner(s): Chriss, Andrew
• Assistant Examiner(s): FAYED, RASHA K
• Application Number:
  US13/382,519
• Publication Number:
  US 20120121028A1
• Time in Patent Office: 1,476 Days
• Field of Search: 370/203, 370/208, 370315-330, 370/468, 370476-478
• US Class Current: 370/208
• CPC Class Codes: H04L 27/00 Modulated-carrier systems
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• 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 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The present invention relates to a method and an apparatus for transmitting/receiving a control format indicator channel for a relay backhaul link in a wireless communication system. According to one aspect of the present invention, a method for transmitting a control format indicator channel for a relay backhaul link in a wireless communication system is configured such that a base station generates a relay physical control format indicator channel (hereinafter, referred to as “R-PCFICH”) containing information on a relay physical downlink control channel (hereinafter, referred to as “R-PDCCH”) region, and transmits the R-PCFICH through a first OFDM symbol of the R-PDCCH region.

Claims

1. A method for transmitting a control format indicator channel for a backhaul link between a base station (BS) and a relay node (RN) by the BS of a wireless communication system, the method comprising:

generating a relay physical control format indicator channel (R-PCFICH) including information of a relay physical downlink control channel (R-PDCCH) region, the R-PDCCH region being included in a data region of a downlink subframe; and

transmitting the R-PCFICH through a first OFDM symbol of the R-PDCCH region;

wherein the R-PCFICH includes information regarding the number of OFDM symbols contained in the R-PDCCH region;

wherein the R-PCFICH is distributed and mapped on a frequency axis of the first OFDM symbol of the R-PDCCH region at a predetermined interval; and

wherein the R-PCFICH carries an indicator (A) for indicating the information regarding the number of OFDM symbols contained in the R-PDCCH region, wherein correspondence between the indicator (A) and OFDM symbols contained in the R-PDCCH region is defined by a table as follows;

2. The method according to claim 1, wherein the R-PCFICH includes an integer number of physical resource blocks (PRBs).

3. The method according to claim 1, wherein the information regarding the number of OFDM symbols is represented in units of one OFDM symbol or units of a predetermined number of OFDM symbols.

4. The method according to claim 1, wherein the R-PCFICH is transmitted every subframe.

5. A method for receiving a control format indicator channel for a backhaul link between a base station (BS) and a relay node (RN) by a relay node (RN) of a wireless communication system, the method comprising:

receiving a relay physical control format indicator channel (R-PCFICH) including information of a relay physical downlink control channel (R-PDCCH) region through a first OFDM symbol of the R-PDCCH region, the R-PDCCH region being included in a data region of a downlink subframe; and

decoding the R-PDCCH using the information of the R-PDCCH region wherein the R-PCFICH includes information regarding the number of OFDM symbols contained in the R-PDCCH region;

wherein the R-PCFICH is distributed and mapped on a frequency axis of the first OFDM symbol of the R-PDCCH region at a predetermined interval; and

wherein the R-PCFICH carries an indicator (A) for indicating the information regarding the number of OFDM symbols contained in the R-PDCCH region, wherein correspondence between the indicator (A) and OFDM symbols contained in the R-PDCCH region is defined by a table as follows;

6. The method according to claim 5, wherein the R-PCFICH includes an integer number of physical resource blocks (PRBs).

7. The method according to claim 5, wherein the information regarding the number of OFDM symbols is represented in units of one OFDM symbol or units of a predetermined number of OFDM symbols.

8. The method according to claim 5, wherein the R-PCFICH is transmitted every subframe.

9. A base station (BS) for a wireless communication system supporting a relay node (RN) through a backhaul link between the BS and the RN comprising:

a processor for generating a relay physical control format indicator channel (R-PCFICH) including information of a relay physical downlink control channel (R-PDCCH) region, the R-PDCCH region being included in a data region of a downlink subframe; and

a transmission module for transmitting the R-PCFICH through a first OFDM symbol of the R-PDCCH region;

wherein the R-PCFICH includes information regarding the number of OFDM symbols contained in the R-PDCCH region;

wherein the R-PCFICH is distributed and mapped on a frequency axis of the first OFDM symbol of the R-PDCCH region at a predetermined interval; and

wherein the R-PCFICH carries an indicator (A) for indicating the information regarding the number of OFDM symbols contained in the R-PDCCH region, wherein correspondence between the indicator (A) and OFDM symbols contained in the R-PDCCH region is defined by a table as follows;

10. The base station (BS) according to claim 9, wherein the R-PCFICH includes an integer number of physical resource blocks (PRBs).

11. The base station (BS) according to claim 9, wherein the information regarding the number of OFDM symbols is represented in units of one OFDM symbol or units of a predetermined number of OFDM symbols.

12. The base station (BS) according to claim 9, wherein the R-PCFICH is transmitted every subframe.

13. A relay node (RN) for a wireless communication system supporting a backhaul link between a base station BS and the RN comprising:

a reception module for receiving a relay physical control format indicator channel (R-PCFICH) including information of a relay physical downlink control channel (R-PDCCH) region through a first OFDM symbol of the R-PDCCH region, the R-PDCCH region being included in a data region of a downlink subframe; and

a processor for decoding the R-PDCCH using the information of the R-PDCCH region;

wherein the R-PCFICH includes information regarding the number of OFDM symbols contained in the R-PDCCH region;

wherein the R-PCFICH is distributed and mapped on a frequency axis of the first OFDM symbol of the R-PDCCH region at a predetermined interval; and

wherein the R-PCFICH carries an indicator (A) for indicating the information regarding the number of OFDM symbols contained in the R-PDCCH region, wherein correspondence between the indicator (A) and OFDM symbols contained in the R-PDCCH region is defined by a table as follows;

14. The relay node (RN) according to claim 13, wherein the R-PCFICH includes an integer number of physical resource blocks (PRBs).

15. The relay node (RN) according to claim 13, wherein the information regarding the number of OFDM symbols is represented in units of one OFDM symbol or units of a predetermined number of OFDM symbols.

16. The relay node (RN) according to claim 13, wherein the R-PCFICH is transmitted every subframe.