Method of receiving data from base station at relay node in wireless communication system and apparatus thereof

• US 9,148,883 B2
• Filed: 10/20/2014
• Issued: 09/29/2015
• 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
• Primary Examiner(s): MEW, KEVIN D
• Application Number:
  US14/518,822
• Publication Number:
  US 20150036585A1
• Time in Patent Office: 344 Days
• US Class Current: 1/1
• 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); and

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

wherein, if the R-PDCCH is modulated based on a relay-node-specific reference signal and carries a specific downlink control information, the PDSCH is transmitted 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 transmitted 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);

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 a relay-node-specific reference signal and carries a specific downlink control information, the PDSCH is transmitted 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 transmits 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.

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

receiving a relay-node-specific downlink physical control channel (R-PDCCH) from the base station; and

receiving the PDSCH based on a predetermined antenna port and a predetermined scrambling identifier (SCID), if the R-PDCCH is demodulated based on a relay-node-specific reference signal and a specific downlink information is detected from the R-PDCCH.

16. The method of claim 15, wherein the relay-node-specific reference signal is a Demodulation-Reference Signal (DM-RS).

17. The method of claim 16, wherein the predetermined antenna port is one of antenna ports defining the DM-RS.

18. The method of claim 15, wherein the predetermined antenna port and the predetermined scrambling ID respectively correspond to antenna port 7 and scrambling ID 0.

19. The method of claim 15, wherein the R-PDCCH is received using the predetermined antenna port and the predetermined SCID.

20. The method of claim 15, wherein the specific downlink control information is used for scheduling of one PDSCH codeword.

21. A relay node in a multiple antenna wireless communication system, the relay node comprising:

a receiving mode for receiving a relay-node-specific downlink physical control channel (R-PDCCH) and a downlink physical shared channel (PDSCH) from a base station; and

a processor for demodulating the R-PDCCH based on a relay-node-specific reference signal,

wherein the PDSCH is received based on a predetermined antenna port and a predetermined scrambling identifier (SCID), if the R-PDCCH is demodulated based on a relay-node-specific reference signal and a specific downlink information is detected from the R-PDCCH.

22. The relay node of claim 21, wherein the relay-node-specific reference signal is a Demodulation-Reference Signal (DM-RS).

23. The relay node of claim 22, wherein the predetermined antenna port is one of antenna ports defining the DM-RS.

24. The relay node of claim 21, wherein the predetermined antenna port and the predetermined scrambling ID respectively correspond to antenna port 7 and scrambling ID 0.

25. The relay node of claim 21, wherein the R-PDCCH is received using the predetermined antenna port and the predetermined SCID.

26. The relay node of claim 21, wherein the specific downlink control information is used for scheduling of one PDSCH codeword.