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

• US 9,236,989 B2
• Filed: 12/11/2014
• Issued: 01/12/2016
• 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:
  US14/567,909
• Publication Number:
  US 20150092635A1
• Time in Patent Office: 397 Days
• Field of Search: None
• US Class Current: 1/1
• 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 receiving an aperiodic sounding reference signal (SRS) from a user equipment (UE) at a base station in a time division duplex (TDD) communication system. The method according to one embodiment includes transmitting downlink control information (DCI) including a request of the aperiodic SRS to the UE. The downlink control information includes information for receiving downlink data using multiple antennas from the base station by the user equipment. The method according to the embodiment further includes receiving the aperiodic SRS from the UE in response to the request.

Claims

1. A method for receiving an aperiodic sounding reference signal (SRS) from a user equipment (UE) at a base station in a time division duplex (TDD) communication system, the method comprising:

transmitting downlink control information (DCI) including a request of the aperiodic SRS to the UE, wherein the DCI includes information for receiving downlink data using multiple antennas from the base station by the user equipment; and

receiving the aperiodic SRS from the UE in response to the request.

2. The method according to claim 1, wherein, if the DCI is transmitted on an nth subframe, the aperiodic SRS is received on an (n+k)th subframe (k≧

4).

3. The method according to claim 1, further comprising:

configuring at least one parameter for the aperiodic SRS through a Radio Resource Control (RRC) layer to the UE,

wherein the aperiodic SRS is transmitted using the at least one parameter.

4. The method according to claim 3, wherein the at least one parameter includes information on at least one of a bandwidth for the aperiodic SRS, a frequency start position for the aperiodic SRS, and a transmissionComb for the aperiodic SRS.

5. A base station in a time division duplex (TDD) communication system, the base station comprising:

a transmission module configured to transmit downlink control information (DCI) including a request of an aperiodic sounding reference signal (SRS) to the UE, wherein the DCI includes information for receiving downlink data using multiple antennas from the base station by the user equipment; and

a reception module configured to receive the aperiodic SRS from the UE in response to the request.

6. The base station according to claim 5, wherein, if the DCI is transmitted on an nth subframe, the aperiodic SRS is received on an (n+k)th subframe (k≧

4).

7. The base station according to claim 5, further comprising:

configuring at least one parameter for the aperiodic SRS through a Radio Resource Control (RRC) layer to the UE,

wherein the aperiodic SRS is transmitted using the at least one parameter.

8. The base station according to claim 7, wherein the at least one parameter includes information on at least one of a bandwidth for the aperiodic SRS, a frequency start position for the aperiodic SRS, and a transmissionComb for the aperiodic SRS.