Method for transmitting a sounding reference signal in a wireless communication system, and apparatus for same

• US 9,935,752 B2
• Filed: 12/04/2015
• Issued: 04/03/2018
• Est. Priority Date: 09/21/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Noh, Min Seok, Chung, Jae Hoon, Moon, Sung Ho, Han, Seung Hee, Lee, Moon Il
• Primary Examiner(s): NGUYEN, MINH TRANG T
• Application Number:
  US14/960,064
• Publication Number:
  US 20160087771A1
• Time in Patent Office: 851 Days
• Field of Search: None
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• 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: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

A method for transmitting a sounding reference signal (SRS) at a user equipment in a time division duplex (TDD) communication system; and the user equipment are discussed. The method includes receiving downlink control information (DCI) including a request of the SRS transmission. The DCI includes information for receiving downlink data using multiple antennas by the user equipment. The method further includes transmitting the SRS to the base station according to the request of the SRS transmission.

Claims

1. A method for transmitting a sounding reference signal (SRS) at a user equipment in a time division duplex (TDD) communication system, the method comprising:

receiving downlink control information (DCI) including a request of the SRS transmission, wherein the DCI is for receiving downlink data using multiple antennas by the user equipment; and

transmitting the SRS to the base station according to the request of the SRS transmission.

2. The method according to claim 1, wherein the user equipment is configured with at least one parameter of the SRS by radio resource control (RRC) layer signaling.

3. The method according to claim 1, wherein the DCI includes a request of a release of the SRS.

4. The method according to claim 3, further comprising:

stopping the SRS transmission according to the request of the SRS release.

5. The method according to claim 1, wherein the DCI includes at least one parameter of the SRS.

6. The method according to claim 1, wherein the SRS is transmitted on a subframe configured cell-specifically for the SRS.

7. The method according to claim 1, wherein, if the downlink control information is received on a subframe #n, the SRS is transmitted on a subframe #(n+k)th, where k≥

4.

8. A user equipment in a time division duplex (TDD) communication system, the user equipment comprising:

a reception module configured to receive downlink control information (DCI) including a request of a sounding reference signal (SRS) transmission, wherein the DCI is for receiving downlink data using multiple antennas by the user equipment; and

a transmission module configured to transmit the SRS to the base station according to the request of the SRS transmission.

9. The user equipment according to claim 8, wherein the user equipment is configured with at least one parameter of the SRS by radio resource control (RRC) layer signaling.

10. The user equipment according to claim 8, wherein the DCI includes a request of a release of the SRS.

11. The user equipment according to claim 10, wherein the reception module is further configured to stop the SRS transmission according to the request of the SRS release.

12. The user equipment according to claim 8, wherein the DCI includes at least one parameter of the SRS.

13. The user equipment according to claim 8, wherein the transmission module is configured to transmit the SRS on a subframe configured cell-specifically for the SRS.

14. The user equipment according to claim 8, wherein, if the downlink control information is received on a subframe #n, the transmission module is configured to transmit the SRS on a subframe #(n+k)th, where k≥

4.