Method and apparatus for transmitting signal in wireless communication system

• US 8,582,419 B2
• Filed: 12/28/2009
• Issued: 11/12/2013
• Est. Priority Date: 12/29/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Han Byul, Kim, Byoung Hoon
• Primary Examiner(s): LIU, JUNG
• Application Number:
  US13/133,144
• Publication Number:
  US 20110250897A1
• Time in Patent Office: 1,415 Days
• Field of Search: 370203-271, 370310-394, 370/395.1, 370/395.3, 370/395.4, 370/395.41, 370/395.42, 370/395.5, 370/395.52, 370/395.53, 370412-421, 370431-529
• US Class Current: 370/208
• CPC Class Codes: H04B 7/15 Active relay systems
• 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 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method of transmitting a signal of a base station in a wireless communication system is provided. The method includes transmitting a first signal to the relay station through the transmission period in a subframe including a transmission period and a guard time for transmission/reception switching of a relay station, and transmitting a second signal to a macro user equipment through the guard time. Accordingly, a signal can be effectively transmitted in the wireless communication system employing the relay station.

Claims

1. A method for monitoring control channels by a relay node (RN), the method comprising:

receiving a multicast/broadcast single frequency network (MBSFN) configuration from a base station (BS), the MBSFN configuration indicating at least one BS-to-RN subframe among a plurality of subframes, the at least one BS-to-RN subframe being used for communication from the BS to the RN, the at least one BS-to-RN subframe including a first slot and a second slot in a time domain, wherein the first slot and the second slot are consecutive in the time domain;

receiving a configuration message from the BS, the configuration message indicating a start location of a downlink (DL) control channel in the at least one BS-to-RN subframe;

monitoring the DL control channel intended for the RN at the first slot of the at least one BS-to-RN subframe based on the configuration message, the DL control channel including a downlink resource assignment and being demodulated using a dedicated reference signal (RS) transmitted in the first slot of the at least one BS-to-RN subframe;

receiving downlink data on a DL data channel indicated by the downlink resource assignment at the second slot of the at least one BS-to-RN subframe when the downlink resource assignment is detected on the DL control channel.

2. The method of claim 1, wherein the downlink resource assignment on the DL control channel is obtained by blind decoding.

3. The method of claim 1, wherein when the downlink resource assignment is received in a first frequency band at the first slot of the at least one BS-to-RN subframe, the DL data channel is received in the first frequency band at the second slot of the at least one BS-to-RN subframe.

7. The method of claim 1, wherein when each of the at least one BS-to-RN subframe comprises 14 orthogonal frequency division multiplexing (OFDM) symbols or 12 OFDM symbols, the start location of the DL control channel is a third OFDM symbol or a fourth OFDM symbol.

4. A relay node (RN) comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal; and

a processor coupled to the RF unit and being configured to;

receive a multicast/broadcast single frequency network (MBSFN) configuration from a base station (BS), the MBSFN configuration indicating at least one BS-to-RN subframe among a plurality of subframes, the at least one BS-to-RN subframe being used for communication from the BS to the RN, the at least one BS-to-RN subframe including a first slot and a second slot in a time domain, wherein the first slot and the second slot are consecutive in the time domain;

receive a configuration message from the BS, the configuration message indicating a start location of a downlink (DL) control channel in the at least one BS-to-RN subframe;

monitor the DL control channel intended for the RN at the first slot of the at least one BS-to-RN subframe based on the configuration message, the DL control channel including a downlink resource assignment and being demodulated using a dedicated reference signal (RS) transmitted in the first slot of the at least one BS-to-RN subframe;

receive downlink data on a DL data channel indicated by the downlink resource assignment at the second slot of the at least one BS-to-RN subframe when the downlink resource assignment is detected on the DL control channel.

5. The RN of claim 4, wherein the downlink resource assignment on the DL control channel is obtained by blind decoding.

6. The RN of claim 4, wherein when the downlink resource assignment is received in a first frequency band at the first slot of the at least one BS-to-RN subframe, the DL data channel is received in the first frequency band at the second slot of the at least one BS-to-RN subframe.

8. The RN of claim 4, wherein when each of the at least one BS-to-RN subframe comprises 14 orthogonal frequency division multiplexing (OFDM) symbols or 12 OFDM symbols, the start location of the DL control channel is a third OFDM symbol or a fourth OFDM symbol.