Method of operating relay station in wireless communication system

• US 9,680,557 B2
• Filed: 12/14/2015
• Issued: 06/13/2017
• Est. Priority Date: 10/27/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Dae Won, Kim, Hak Seong, Kim, Ki Jun, Noh, Yu Jin, Kim, Bong Hoe
• Primary Examiner(s): LI, GUANG W
• Application Number:
  US14/968,220
• Publication Number:
  US 20160099767A1
• Time in Patent Office: 547 Days
• Field of Search: 370315
• 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 base station (BS) in a wireless communication system, the method comprising:

transmitting subframe configuration information to a relay station (RS); and

transmitting a signal to the RS in a downlink subframe configured 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 a user equipment (UE), are performed at different times and in a downlink frequency band, and

wherein when a frame comprises 10 downlink subframes, the downlink subframe for transmitting the signal to the RS 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 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 times and in an uplink frequency band.

3. The method of claim 2, wherein the frame comprises 10 downlink subframes in the downlink frequency band and 10 uplink subframes in the uplink frequency band.

4. The method of claim 1, wherein subframe configuration information is transmitted through a higher layer signal.

5. A base station (BS) comprising:

a radio frequency (RF) unit that transmits and receives a radio signal; and

a processor, coupled to the RF unit, that;

controls the RF unit to transmit subframe configuration information to a relay station (RS) and

controls the RF unit to transmit a signal to the RS in a downlink subframe configured 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 a user equipment (UE), are performed at different times and in a downlink frequency band, and

wherein when a frame comprises 10 downlink subframes, the downlink subframe for transmitting the signal to the RS 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.

6. The BS of claim 5, 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 times and in an uplink frequency band.

7. The BS of claim 6, wherein the frame comprises 10 downlink subframes in the downlink frequency band and 10 uplink subframes in the uplink frequency band.

8. The BS of claim 5, wherein subframe configuration information is transmitted through a higher layer signal.