METHOD AND APPARATUS FOR RELAYING DATA IN WIRELESS COMMUNICATION SYSTEM BASED ON TDD

• US 20110228709A1
• Filed: 11/02/2009
• Published: 09/22/2011
• Est. Priority Date: 11/11/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Han Byul, Yun, Young Woo, Lee, Dae Won, Kim, Byoung Hoon, Kwon, Yeong Hyeon, Chung, Jae Hoon
• Granted Patent: US 9,271,277 B2
• Time in Patent Office: Days
• US Class Current: 370/279
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04J 3/00 Time-division multiplex systems H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention provides a method and an apparatus of relaying data in a wireless communication system based on Time Division Duplex (TDD). A relay station receives downlink data from a base station in an uplink subframe and relays the downlink data to at least one mobile station. Accordingly, the efficiency of resource allocation for a relay station can be improved.

Claims

1. A method of relaying data in a wireless communication system based on Time Division Duplex (TDD) using a radio frame comprising a plurality of subframes, the plurality of subframes comprising at least one downlink subframe and at least one uplink subframe, the method comprising:

receiving downlink data from a base station in an uplink subframe; and

relaying the downlink data to at least one mobile station.

2. The method of claim 1, further comprising receiving uplink data from a mobile station in the uplink subframe.

3. The method of claim 2, wherein resources used by the base station to transmit the downlink data in the uplink subframe and resources used by the mobile station to transmit the uplink data do not overlap with each other.

4. The method of claim 3, wherein the resources are subject to time division or frequency division.

5. The method of claim 1, further comprising receiving information about the uplink subframe in which the downlink data is received.

6. The method of claim 1, further comprising selecting the uplink subframe in which the downlink data is received from among the plurality of uplink subframes.

7. The method of claim 1, wherein the radio frame comprises 10 subframes.

8. The method of claim 7, wherein the radio frame corresponds to at least any one of configurations in Table 1 below, wherein ‘

D’

denotes a downlink subframe, ‘

U’

denotes an uplink subframe, and ‘

S’

denotes a special subframe.

9. A relay station in a wireless communication system based on TDD using a radio frame comprising a plurality of subframes, the plurality of subframes comprising at least one downlink subframe and at least one uplink subframe, the relay station comprising:

a transceiver configured to transmit or receive a radio signal; and

a processor coupled to the transceiver and configured to process downlink data received from a base station and relay the downlink data to a mobile station,

wherein the processor receives the downlink data from the base station in at least any one of the uplink subframes included in the radio frame.