METHOD AND APPARATUS FOR ALLOCATING A DOWNLINK CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM

• US 20140133429A1
• Filed: 07/04/2012
• Published: 05/15/2014
• Est. Priority Date: 07/05/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Jin Young, Kim, Ki Tae, Kim, Su Nam, Kang, Ji Won, Ihm, Bin Chul, Park, Sung Ho
• Granted Patent: US 9,515,796 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04J 11/004 using regenerative subtractive interference cancellation
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals

Abstract

Provided are a method and apparatus for allocating a downlink control channel in a wireless communication system. A base station allocates a downlink control channel to cell-specific reference signal (CRS) resource elements (REs) capable of transmitting a CRS and transmits a downlink control signal to a terminal through the allocated downlink control channel.

Claims

1. A method for allocating, by a base station, a downlink control channel in a wireless communication system, the method comprising:

allocating a downlink control channel to cell-specific reference signal (CRS) resource elements (REs) to which a CRS can be transmitted; and

transmitting a downlink control signal through the allocated downlink control channel.

2. The method of claim 1, wherein the downlink control channel is an enhanced physical downlink channel (e-PDCCH) which is a downlink control channel for a multi-node system.

3. The method of claim 2, wherein the e-PDCCH is allocated to a maximum of 36 CRS REs in at least one resource block (RB).

4. The method of claim 2, wherein the e-PDCCH is allocated to CRS REs in at least one RB and a part of REs adjacent to the CRS REs.

5. The method of claim 2, wherein the e-PDCCH is allocated to a part of orthogonal frequency division multiplexing (OFDM) symbols including the CRS RE.

6. The method of claim 2, wherein the e-PDCCH is allocated to a maximum of 36 REs.

7. The method of claim 1, wherein the downlink control channel is an enhanced physical control format indicator channel (e-PCFICH) which is a downlink control channel for a multi-node system.

8. The method of claim 7, wherein the e-PCFICH is allocated to a maximum of 16 REs.

9. A method for receiving, by a user equipment, a downlink signal in a wireless communication system, the method comprising:

receiving a cell-specific reference signal (CRS) from a first node among a plurality of nodes through CRS resource elements (REs) to which a CRS can be transmitted;

receiving a downlink signal from a second node among the plurality of nodes through the CRS REs; and

decoding the received downlink signal by removing interference due to the CRS,

wherein the plurality of nodes has the same cell identifier (ID).

10. The method of claim 9, wherein the downlink signal is downlink data received through a physical downlink shared channel (PDSCH).

11. The method of claim 9, wherein the downlink signal is a downlink control signal received through an enhanced physical downlink channel (e-PDCCH) or enhanced physical control format indicator channel (e-PCFICH) which is a downlink control channel for a multi-node system.

12. The method of claim 9, further comprising:

receiving information on the CRS.

13. The method of claim 12, wherein the removing interference due to the CRS is performed based on information about the CRS.

14. The method of claim 9, wherein the removing interference due to the CRS is commanded by a network.

15. The method of claim 9, wherein the removing interference due to the CRS is always performed in a specific subframe.