METHOD OF TRANSCEIVING SIGNAL AT RELAY NODE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF

• US 20130010676A1
• Filed: 03/10/2011
• Published: 01/10/2013
• Est. Priority Date: 03/11/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hak Seong, Seo, Han Byul, Kim, Ki Jun
• Granted Patent: US 9,356,680 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence

Abstract

A method for allowing a relay node (RN) to transmit and receive in a wireless communication system is disclosed. A method for transmitting and receiving a signal at a relay node in a wireless communication system includes transmitting and receiving a relay-User Equipment (UE) link signal through an access subframe, switching a communication link from a relay-UE link to a relay-base station (BS) link during a predetermined time, and transmitting and receiving a relay?BS link signal through a backhaul subframe. A timing edge of the access subframe is located ahead of a timing edge of an uplink subframe of the backhaul subframe by an offset value.

Claims

1. A method for transmitting and receiving a signal at a relay node in a wireless communication system, the method comprising:

transmitting and receiving a relay-User Equipment (UE) link signal through an access subframe;

switching a communication link from a relay-UE link to a relay-base station (BS) link during a predetermined time; and

transmitting and receiving a relay?BS link signal through a backhaul subframe,

wherein a timing edge of the access subframe is located ahead of a timing edge of an uplink subframe of the backhaul subframe by an offset value.

2. The method according to claim 1, wherein the timing edge of the uplink subframe of the access subframe is identical to a timing edge of a downlink subframe of the access subframe.

3. The method according to claim 1, wherein:

if a propagation delay is present in the relay-BS link, a downlink subframe edge of the backhaul subframe is delayed from a timing edge of a reference subframe by a symbol length corresponding to the propagation delay, and an uplink subframe edge of the backhaul subframe is located ahead of the timing edge of the reference subframe edge by the symbol length corresponding to the propagation delay.

4. The method according to claim 1, wherein the offset value is a 1/2 symbol.

5. The method according to claim 1, wherein a shortened Physical Uplink Control Channel (PUCCH) format in which one symbol is punctured in the uplink subframe from among the backhaul subframe is used.

6. A relay device for use in a wireless communication system, comprising:

a transmission/reception (Tx/Rx) module for transmitting/receiving a relay-User Equipment (UE) link signal through an access subframe, or transmitting/receiving a relay-base station (BS) link signal through a backhaul subframe; and

a processor for switching a communication link from a relay-UE link to a relay-base station (BS) link during a predetermined time,

wherein a timing edge of the access subframe is located ahead of a timing edge of an uplink subframe of the backhaul subframe by an offset value.

7. The relay device according to claim 6, wherein the timing edge of the uplink subframe of the access subframe is identical to a timing edge of a downlink subframe of the access subframe.

8. The relay device according to claim 6, wherein:

if a propagation delay is present in the relay-BS link, a downlink subframe edge of the backhaul subframe is delayed from a timing edge of a reference subframe by a symbol length corresponding to the propagation delay, and an uplink subframe edge of the backhaul subframe is located ahead of the timing edge of the reference subframe edge by the symbol length corresponding to the propagation delay.

9. The relay device according to claim 6, wherein the offset value is a 1/2 symbol.

10. The relay device according to claim 6, wherein a shortened Physical Uplink Control Channel (PUCCH) format in which one symbol is punctured in the uplink subframe from among the backhaul subframe is used.