Method of operating relay station in wireless communication system

• US 8,675,542 B2
• Filed: 10/26/2009
• Issued: 03/18/2014
• Est. Priority Date: 10/27/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hak Seong, Kim, Ki Jun, Noh, Yujin, Lee, Daewon, Kim, Bong Hoe
• Primary Examiner(s): LI, GUANG W
• Application Number:
  US12/588,725
• Publication Number:
  US 20100103860A1
• Time in Patent Office: 1,604 Days
• Field of Search: 370/315
• US Class Current: 370/315
• CPC Class Codes: H04B 7/15507 Relay station based processing for cell extension or control of coverage area, network planning with network coordinated processing with regard to cell extension H04W16/26; network topologies using dedicated repeater stations H04W84/047; terminal devices adapted for relaying to or from an other terminal H04W88/04
• 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: H04B 7/15557 Selecting relay station operation mode, e.g. between amplify and forward mode, decode and forward mode or FDD - and TDD mode
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/1273 of downlink data flows
• 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

Abstract

A method of operating a relay station in a wireless communication system is provided. The method includes operating in a first mode comprising a first sub-mode and a second sub-mode, in the first sub-mode a first downlink and a first uplink between a base station and the relay station being simultaneously activated, in the second sub-mode a second downlink and a second uplink between the relay station and a mobile station being simultaneously activated, and operating in a second mode comprising a third sub-mode and a fourth sub-mode, in the third sub-mode the first downlink and the second uplink being simultaneously activated, in the fourth sub-mode the first uplink and the second downlink being simultaneously activated.

Claims

1. A method of operating a relay station (RS) in a wireless communication system, the method comprising:

receiving subframe configuration information through a higher layer from a base station (BS); and

configuring a downlink subframe based on the subframe configuration information,

wherein a first downlink transmission, from the BS to the RS, and a second downlink transmission, from the RS to an user equipment (UE), are performed at different time and in a downlink frequency band and,

wherein a first uplink transmission, from the RS to the BS, and a second uplink transmission, from the UE to the RS, are performed at different time and in an uplink frequency band, and

wherein the downlink subframe is configured for receiving a signal by the first downlink transmission, and

wherein when a frame comprises 10 downlink subframes, the downlink subframe is configured per a specific number of subframes with an exception of a first downlink subframe, a fifth downlink subframe, a sixth downlink subframe and a tenth downlink subframe of the frame.

2. The method of claim 1, wherein the first downlink subframe, the fifth downlink subframe, the sixth downlink subframe and the tenth downlink subframe in the frame are used for transmitting at least one of a synchronization channel, a broadcast channel, and a paging channel.

3. The method of claim 1, wherein the subframe configuration information comprises a bitmap used for indicating the downlink subframe.

4. The method of claim 1, wherein the RS performs at least one hybrid automatic repeat request (HARQ) process regarding the UE.

5. The method of claim 4, wherein each HARQ process starts every two or more subframes.

7. The method of claim 1, wherein the frame comprises 10 downlink subframes in the downlink frequency band and 10 uplink subframes in the uplink frequency band.

6. A relay station (RS) comprising:

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

a processor coupled to the RF unit,

wherein the processor receives subframe configuration information through a higher layer from a base station (BS); and

configures a downlink subframe based on the subframe configuration information,

wherein a first downlink transmission, from the BS to the RS, and a second downlink transmission, from the RS to an user equipment (UE), are performed at different time and in a downlink frequency band and,

wherein a first uplink transmission, from the RS to the BS, and a second uplink transmission, from the UE to the RS, are performed at different time and in an uplink frequency band, and

wherein the downlink subframe is configured for receiving a signal by the first downlink transmission, and

wherein when a frame comprises 10 downlink subframes, the downlink subframe is configured per a specific number of subframes with an exception of a first downlink subframe, a fifth downlink subframe, a sixth downlink subframe and a tenth downlink subframe of the frame.