METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNAL

• US 20140362799A1
• Filed: 12/28/2012
• Published: 12/11/2014
• Est. Priority Date: 12/28/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hak Seong, Kim, Ki Jun, Kim, Byoung Hoon
• Granted Patent: US 9,479,305 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• 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: H04W 74/006 in the downlink, i.e. towards the terminal

Abstract

Provided are a method and a wireless device for transmitting a sounding reference signal in a wireless communication system. The wireless device receives an SRS (sounding reference signal) configuration for a periodic transmission, and transmits the SRS in a randomly determined subframe from among a plurality of SRS subframes determined on the basis of the SRS configuration.

Claims

1. A method for transmitting a sounding reference signal (SRS) in a wireless communication system, the method comprising:

receiving by a wireless device, an SRS configuration for a periodic transmission; and

transmitting by the wireless device, the SRS in a randomly selected subframe among a plurality of SRS subframes determined based on the SRS configuration.

2. The method of claim 1, wherein the SRS configuration is a cell-specific SRS configuration.

3. The method of claim 1, wherein the wireless device selects the subframe according to a random interval determined based on a random sequence generator.

4. The method of claim 3, wherein the random sequence generator is initialized based on an identifier of the wireless device.

5. The method of claim 1, wherein the SRS is transmitted in a last orthogonal frequency division multiplexing (OFDM) symbol of the randomly selected subframe.

6. A wireless device for transmitting a sounding reference signal (SRS) in a wireless communication system, the wireless device comprising:

a radio frequency (RF) unit configured to transmit and receive a radio signal; and

a processor operatively coupled to the RF unit and configured to;

receive an SRS configuration for a periodic transmission; and

transmit the SRS in a randomly selected subframe among a plurality of SRS subframes determined based on the SRS configuration.

7. The wireless device of claim 6, wherein the SRS configuration is a cell-specific SRS configuration.

8. The wireless device of claim 6, wherein the processor is configured to select the subframe according to a random interval determined based on a random sequence generator.

9. The wireless device of claim 8, wherein the random sequence generator is initialized based on an identifier of the wireless device.