Method and apparatus for transmitting sounding reference signal

• US 9,479,305 B2
• Filed: 12/28/2012
• Issued: 10/25/2016
• 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
• Primary Examiner(s): O CONNOR, BRIAN T
• Application Number:
  US14/369,605
• Publication Number:
  US 20140362799A1
• Time in Patent Office: 1,397 Days
• US Class Current: 1/1
• 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 based on the SRS configuration,

wherein the received SRS configuration includes a cell specific SRS configuration,

wherein a cell specific SRS transmission subframe is configured by using the cell specific SRS configuration,

wherein a user equipment (UE) specific SRS transmission subframe is configured by using a UE specific parameter from the configured cell specific SRS transmission subframe, and

wherein the SRS is transmitted through the configured UE specific SRS transmission subframe according to a random interval determined based on a random sequence generator.

2. The method of claim 1, wherein the random sequence generator is initialized based on an identifier of the wireless device.

3. The method of claim 1, wherein the SRS is transmitted in a last orthogonal frequency division multiplexing (OFDM) symbol of the UE specific SRS transmission subframe.

4. 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 based on the SRS configuration,

wherein the received SRS configuration includes a cell specific SRS configuration,

wherein a cell specific SRS transmission subframe is configured by using the cell specific SRS configuration,

wherein a user equipment (UE) specific SRS transmission subframe is configured by using a UE specific parameter from the configured cell specific SRS transmission subframe, and

wherein the SRS is transmitted through the configured UE specific SRS transmission subframe according to a random interval determined based on a random sequence generator.

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