# US 2013/0156014 A1 · Method for transmitting an srs-triggering-based srs in a wireless communication system

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- Number: US 2013/0156014 A1
- Document ID: US20130156014A1
- Status: Published application
- Kind: A1
- Application number: 13/697,521
- Filed: 2011-05-12
- Published: 2013-06-20
- Earliest claimed: 2010-05-12
- Assignees: LG Electronics Inc.
- Inventors: Dongcheol Kim; Hangyu Cho
- Web page: https://patentgrep.com/patent/US20130156014A1

## CPC

- H04W 72/20: Control channels or signalling for resource management
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## 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

### Claim 1

A method for transmitting a Sounding Reference Signal (SRS) triggering-based SRS by a user equipment in a wireless communication system, comprising:
receiving a SRS triggering indicator for triggering SRS transmission from a base station; and
transmitting the SRS in a preconfigured uplink subframe according to the SRS triggering indicator.

### Claim 2 (depends on 1)

The method of claim 1, wherein the SRS triggering indicator is received through a downlink grant, an uplink grant, a group SRS message format, an SRS command of a Downlink Control Information (DCI) format, or a Transmit Power Control (TPC) command of DCI format 3/3A.

### Claim 3 (depends on 1)

The method of claim 1, wherein the preconfigured uplink subframe is a first uplink subframe allocated to the user equipment at a time when the SRS triggering indicator is received or a second uplink subframe allocated to the user equipment for SRS transmission after the first uplink subframe.

### Claim 4 (depends on 1)

The method of claim 1, wherein the SRS triggering indicator is received on a specific uplink component carrier allocated to the user equipment and the SRS is transmitted through an uplink subframe preconfigured on the specific uplink component carrier.

### Claim 5 (depends on 2)

The method of claim 2, wherein the group SRS message format is scrambled using a predefined aperiodic SRS-Radio Network Temporary Identifier (SRS-RNTI) per uplink component carrier and the user equipment transmits the SRS through the preconfigured uplink subframe on an uplink component carrier corresponding to the aperiodic SRS-RNTI corresponding to the user equipment.

### Claim 6

A User Equipment for transmitting a Sounding Reference Signal (SRS) triggering-based SRS in a wireless communication system, comprising:
a receiver configured to receive an SRS triggering indicator for triggering SRS transmission from a base station; and
a transmitter configured to transmit the SRS in a preconfigured uplink subframe according to the SRS triggering indicator.

### Claim 7 (depends on 6)

The user equipment of claim 6, wherein the receiver receives the SRS triggering indicator through a downlink grant, an uplink grant, a group SRS message format, an SRS command of a Downlink Control Information (DCI) format, or a Transmit Power Control (TPC) command of DCI format 3/3A.

### Claim 8 (depends on 6)

The user equipment of claim 6, wherein the preconfigured uplink subframe is a first uplink subframe allocated to the user equipment at a time when the SRS triggering indicator is received or a second uplink subframe allocated to the user equipment for SRS transmission after the first uplink subframe.

### Claim 9 (depends on 6)

The user equipment of claim 6, wherein the receiver receives the SRS triggering indicator on a specific uplink component carrier allocated to the user equipment and the transmitter transmits the SRS through an uplink subframe preconfigured on the specific uplink component carrier.

### Claim 10 (depends on 7)

The user equipment of claim 7, wherein the group SRS message format is scrambled using a predefined aperiodic SRS-Radio Network Temporary Identifier (SRS-RNTI) per uplink component carrier and the transmitter transmits the SRS through the preconfigured uplink subframe on an uplink component carrier corresponding to the aperiodic SRS-RNTI corresponding to the user equipment.