Method for transmitting an SRS-triggering-based SRS in a wireless communication system

• US 9,386,570 B2
• Filed: 07/06/2015
• Issued: 07/05/2016
• Est. Priority Date: 05/12/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Dongcheol, Cho, Hangyu
• Primary Examiner(s): Russell, Wanda Z
• Application Number:
  US14/792,382
• Publication Number:
  US 20150334695A1
• Time in Patent Office: 365 Days
• Field of Search: 370/328
• US Class Current: 1/1
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

The present invention relates to a method and terminal apparatus which involve transmitting a sounding reference signal (SRS)-triggering-based SRS in a wireless communication system. The terminal apparatus of the present invention comprises a receiver which receives, from a base station, an SRS-triggering indicator for triggering an SRS transmission; and a transmitter which transmits the SRS via a preconfigured uplink subframe in accordance with the SRS-triggering indicator.

Claims

1. A method for transmitting an aperiodic Sounding Reference Signal (SRS) by a user equipment in a wireless communication system, the method comprising:

receiving, from a base station, a downlink control information (DCI) format through a first component carrier of a plurality of component carriers configured for the user equipment, the DCI format including;

an indicator indicating an index of an activated component carrier of the plurality of component carriers for an aperiodic SRS transmission, the index of the activated component carrier being different from an index of the first component carrier, and

a multi-bits SRS request including;

an indicator for triggering the aperiodic SRS transmission, and

aperiodic SRS configuration information to be used for the aperiodic SRS transmission on the activated component carrier, and

transmitting, to the base station, the aperiodic SRS through the activated component carrier based on;

the indicator indicating the index of the activated component carrier, and

the multi-bits SRS request.

2. The method of claim 1, wherein the aperiodic SRS configuration information indicate at least antenna, bandwidth, or time resource to be used for the aperiodic SRS transmission on the activated component carrier.

3. The method of claim 1, further comprising:

receiving, from the base station through the first component carrier, aperiodic-SRS configuration information on each of component carriers configured for the user equipment, the aperiodic-SRS configuration information being component carrier-specifically configured.

4. The method of claim 3, wherein the aperiodic-SRS configuration information on each of the plurality of component carriers configured for the user equipment is received through a radio resource control (RRC) signal.

5. A user equipment for transmitting an aperiodic Sounding Reference Signal (SRS) in a wireless communication system, the user equipment comprising:

a receiver configured to receive, from a base station, a downlink control information (DCI) format through a first component carrier of a plurality of component carriers configured for the user equipment, the DCI format including;

an indicator indicating an index of an activated component carrier of the plurality of component carriers for an aperiodic SRS transmission, the index of the activated component carrier being different from an index of the first component carrier, and

a multi-bits SRS request including;

an indicator for triggering the aperiodic SRS transmission, and

aperiodic SRS configuration information to be used for the aperiodic SRS transmission on the activated component carrier, and

a transmitter configured to transmit, to the base station, the aperiodic SRS through the activated component carrier based on;

the indicator indicating the index of the activated component carrier, and

the multi-bits SRS request.

6. The user equipment of claim 5, wherein the aperiodic SRS configuration information indicate at least antenna, bandwidth, or time resource to be used for the aperiodic SRS transmission on the activated component carrier.

7. The user equipment of claim 5, wherein the receiver is further configured to receive, from the base station through the first component carrier, aperiodic-SRS configuration information on each of component carriers configured for the user equipment, the aperiodic-SRS configuration information being component carrier-specifically configured.

8. The user equipment of claim 7, wherein the aperiodic-SRS configuration information on each of the plurality of component carriers configured for the user equipment is received through a radio resource control (RRC) signal.