METHOD OF RECEIVING DATA FROM BASE STATION AT RELAY NODE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF

• US 20150036585A1
• Filed: 10/20/2014
• Published: 02/05/2015
• Est. Priority Date: 10/21/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KIM, Hakseong, SEO, Hanbyul
• Granted Patent: US 9,148,883 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/14 Relay systems
• CPC Class Codes: H04B 7/15528 Control of operation parameters of a relay station to exploit the physical medium
• 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: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method is described for transmitting a physical downlink shared channel (PDSCH) to a relay node at a base station in a multiple antenna wireless communication system. The method includes modulating a relay-node-specific physical downlink control channel (R-PDCCH) based on a relay-node-specific reference signal, and transmitting the R-PDCCH and the PDSCH to the relay node. If the R-PDCCH is modulated based on the relay-node-specific reference signal and carries a specific downlink control information, the PDSCH is encoded based on a predetermined antenna port and a predetermined scrambling identifier (SCID).

Claims

1. A method for transmitting a physical downlink shared channel (PDSCH) to a relay node at a base station in a multiple antenna wireless communication system, the method comprising:

modulating a relay-node-specific physical downlink control channel (R-PDCCH) based on a relay-node-specific reference signal; and

transmitting the R-PDCCH and the PDSCH to the relay node,

wherein, if the R-PDCCH is modulated based on the relay-node-specific reference signal and carries a specific downlink control information, the PDSCH is encoded based on a predetermined antenna port and a predetermined scrambling identifier (SCID).

2. The method of claim 1, wherein the relay-node-specific reference signal is a demodulation-reference signal (DM-RS).

3. The method of claim 2, wherein the predetermined antenna port is one of a plurality of antenna ports defining the DM-RS.

4. The method of claim 1, wherein the predetermined antenna port and the predetermined SCID respectively correspond to antenna port 7 and SCID 0.

5. The method of claim 1, wherein the R-PDCCH is encoded using the predetermined antenna port and the predetermined SCID.

6. The method of claim 1, wherein the specific downlink control information is used for scheduling a PDSCH codeword.

7. The method of claim 1, wherein the specific downlink control information does not include information about a transmission rank.

8. A base station in a multiple antenna wireless communication system, the base station comprising:

a processor configured to modulate a relay-node-specific physical downlink control channel (R-PDCCH) based on a relay-node-specific reference signal;

a transmitting module configured to transmit the R-PDCCH and a physical downlink shared channel (PDSCH) to a relay node,

wherein, if the R-PDCCH is modulated based on the relay-node-specific reference signal and carries a specific downlink control information, the processor encodes the PDSCH based on a predetermined antenna port and a predetermined scrambling identifier (SCID).

9. The base station of claim 8, wherein the relay-node-specific reference signal is a demodulation-reference signal (DM-RS).

10. The base station of claim 9, wherein the predetermined antenna port is one of a plurality of antenna ports defining the DM-RS.

11. The base station of claim 8, wherein the predetermined antenna port and the predetermined SCID respectively correspond to antenna port 7 and SCID 0.

12. The base station of claim 8, wherein the processor encodes the R-PDCCH using the predetermined antenna port and the predetermined SCID.

13. The base station of claim 8, wherein the specific downlink control information is used for scheduling a PDSCH codeword.

14. The base station of claim 8, wherein the specific downlink control information does not include information about a transmission rank.