METHOD FOR SETTING SEARCH SPACE FOR RELAY NODE IN WIRELESS COMMUNCATION SYSTEM AND DEVICE THEREFOR

• US 20130294332A1
• Filed: 02/01/2012
• Published: 11/07/2013
• Est. Priority Date: 02/21/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hakseong, Seo, Hanbyul, Kim, Byounghoon, Kim, Kijun
• Granted Patent: US 9,591,664 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• 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: H04J 11/0069 Cell search, i.e. determining cell identity [cell-ID] design of multiplexing codes H04J13/00; processing access restriction or access information H04W48/16; discovery of network devices for network data management H04W8/005; sounding signals for channel estimation H04L25/0226; structure of reference signals in multicarrier modulation systems H04L27/2613; frame, time or carrier synchronisation in multicarrier modulation systems H04L27/2655
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• 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

Disclosed in the present invention is a method for a relay node to receive a control signal from a base station in a wireless communication system. More particularly, the present invention comprises the steps of: receiving a downlink signal from the base station; and obtaining control information for the relay node by blind-decoding the downlink signal, wherein a search space for blind decoding is located in the data region of a subframe, and is divided into a search space for a downlink grant and a search space for an uplink grant. When the subframe corresponding to the control information for the relay node is a downlink (DL) standalone, the search area including only the search space for the downlink grant, or the search area for the uplink grant being set as an invalid search space would be desirable.

Claims

1. A method for receiving a control signal by a relay node from a base station in a wireless communication system, the method comprising:

receiving a downlink signal from the base station; and

obtaining a control information for the relay node by performing blind decoding on the downlink signal,

wherein a search space for performing the blind decoding is located in a data region of a subframe and

wherein the search space is partitioned into a search space for a downlink grant and a search space for an uplink grant.

2. The method of claim 1, wherein if the subframe corresponding to the control information for the relay node comprises a downlink (DL) standalone subframe, the search space comprises the search space for the downlink grant only.

3. The method of claim 1, wherein if the subframe corresponding to the control information for the relay node comprises a downlink (DL) standalone subframe, the search space for the uplink grant is set as an invalid search space.

4. The method of claim 2, wherein obtaining the control information for the relay node, comprises performing the blind decoding on the search space for the downlink grant only.

5. The method of claim 2, further comprising receiving an information on a downlink standalone subframe from an upper layer.

6. The method of claim 1, further comprising receiving information indicating the search space for the downlink grant and the search space for the uplink grant from an upper layer.

7. The method of claim 3, wherein a data channel is mapped to the invalid search space.

8. A relay node in a wireless communication system, comprising:

a receiving module configured to receive a downlink signal from a base station; and

a processor configured to obtain a control information for the relay node by performing blind decoding on the downlink signal,

wherein a search space for performing the blind decoding is located in a data region of a subframe and

wherein the search space is partitioned into a search space for a downlink grant and a search space for an uplink grant.

9. The relay node of claim 8, wherein if the subframe corresponding to the control information for the relay node comprises a downlink (DL) standalone subframe, the search space comprises the search space for the downlink grant only.

10. The relay node of claim 8, wherein if the subframe corresponding to the control information for the relay node comprises a downlink (DL) standalone subframe, the search space for the uplink grant is set as an invalid search space.

11. The relay node of claim 9, wherein the processor performs the blind decoding on the search space for the downlink grant only.

12. The relay node of claim 9, wherein the receiving module receives an information on a downlink standalone subframe from an upper layer.

13. The relay node of claim 8, wherein the receiving module receives information indicating the search space for the downlink grant and the search space for the uplink grant from an upper layer.

14. The relay node of claim 10, wherein a data channel is mapped to the invalid search space.