Communication method using relay station in mobile communication system

• US 9,042,293 B2
• Filed: 12/13/2006
• Issued: 05/26/2015
• Est. Priority Date: 12/13/2005
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jin, Yong Suk, Ryu, Ki Seon, Youn, Ae Ran, Mun, Du Hyun, Kim, Beom Joon, Han, Seung Hee, Kim, Jeong Ki
• Primary Examiner(s): Beharry, Noel
• Assistant Examiner(s): Sciacca, Scott M
• Application Number:
  US12/097,228
• Publication Number:
  US 20100046413A1
• Time in Patent Office: 3,086 Days
• Field of Search: 370/315, 370/329, 370/330, 455/7
• US Class Current: 370/315
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 84/047 using dedicated repeater stations
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A communication method using a relay station (RS) in a mobile communication system is disclosed. A base station transmits identification information, which designates a position of a relay station region during at least one next frame, to a mobile subscriber station through the relay station, and the mobile subscriber station identifies the position of the relay station region during the at least one next frame. Thus, the mobile subscriber station does not need to synchronize with a relay station preamble to retrieve the relay station region for every frame, and a start point of the relay station region can be retrieved quickly and exactly even in the case that the position of the relay station region is varied.

Claims

1. A method for a base station in support of relaying data in a communication system including a relay station (RS), the method comprising:

transmitting a radio resource allocation message including first downlink map (DL-MAP) information and second DL-MAP information, the first DL-MAP information relating to radio resource allocation for transmitting data from the base station to the relay station by using an n^th frame, and the second DL-MAP information relating to radio resource allocation for transmitting data from the relay station to a mobile subscriber station by using an (n+k)^th frame; and

transmitting data from the base station to the relay station during the n^th frame by using the radio resource allocated in accordance with the first DL-MAP information,

wherein the first DL-MAP and the second DL-MAP have the same format,

wherein each of the first DL-MAP information and the second DL-MAP information has a field indicating whether it is the first DL-MAP information or the second DL-MAP information, and

wherein the value of k is equal to 1.

2. The method as claimed in claim 1, wherein the radio resource is allocated in a burst mode.

3. The method as claimed in claim 1, wherein the radio resource allocated by the first DL-MAP information and the radio resource allocated by the second DL-MAP information are exclusive from each other.

4. A method for relaying data transmitted from a base station to a mobile subscriber station through a relay station (RS) in a communication system, the method comprising:

receiving a radio resource allocation message including first downlink map (DL-MAP) information and second DL-MAP information, the first DL-MAP information relating to radio resource allocation for transmitting data from the base station to a relay station by using an n^th frame, and the second DL-MAP information relating to radio resource allocation for transmitting data from the relay station to a mobile subscriber station by using an (n+k)^th frame;

receiving data transmitted from the base station during the nth frame by using the radio resource allocated in accordance with the first DL-MAP information;

decoding the data;

encoding the decoded data; and

transmitting the data to the mobile subscriber station during the (n+k)^th frame by using the radio resource allocated in accordance with the second DL-MAP information,

wherein the first DL-MAP and the second DL-MAP have the same format,

wherein each of the first DL-MAP information and the second DL-MAP information has a field indicating whether it is the first DL-MAP information or the second DL-MAP information, and

wherein the value of k is equal to 1.

5. A method of relaying, at a relay station, data transmitted from a base station to a mobile subscriber station, the method comprising:

receiving a radio resource allocation message including first downlink map (DL-MAP) information and second DL-MAP information, the first DL-MAP information relating to radio resource allocation for transmitting data from the base station to the relay station by using an n^th frame, and the second DL-MAP information relating to radio resource allocation for transmitting data from the relay station to a mobile subscriber station by using an (n+k)^th frame;

receiving data from the base station by using the radio resource allocated by the first DL-MAP information during the n^th frame;

transmitting downlink radio resource allocation information to mobile subscriber stations within a zone of the relay station by using a DL-MAP of the (n+k)^th frame; and

respectively transmitting data to the mobile subscriber stations within the relay station zone during the (n+k)^th frame by using a radio resource allocated by the second DL-MAP information,

wherein the first DL-MAP and the second DL-MAP have the same format,

wherein each of the first DL-MAP information and the second DL-MAP information has a field indicating whether it is the first DL-MAP information or the second DL-MAP information, and

wherein the value of k is equal to 1.

6. The method as claimed in claim 5, wherein the radio resource allocated by the first DL-MAP information and the radio resource allocated by the second DL-MAP information are exclusive from each other.

7. The method as claimed in claim 5, wherein the downlink radio resource allocation information corresponds to the radio resource allocated by the second DL-MAP information.