METHOD OF TERMINAL TRANSMITTING SOUNDING REFERENCE SIGNAL ON THE BASIS OF APERIODIC SOUNDING REFERENCE SIGNAL TRIGGERING AND METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER TO TRANSMIT APERIODIC SOUNDING REFERENCE SIGNAL

• US 20130078913A1
• Filed: 06/03/2011
• Published: 03/28/2013
• Est. Priority Date: 06/04/2010
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Kijun, Kim, Hakseong, Lee, Seungmin, Suh, Hanbyul
• Granted Patent: US 9,713,096 B2
• Time in Patent Office: Days
• US Class Current: 455/39
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• 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: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/18 TPC being performed according to specific parameters
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 52/54 Signalisation aspects of the TPC commands, e.g. frame structure

Abstract

The method of the terminal transmitting the SRS on the basis of the aperiodic SRS triggering according to the present invention comprises the steps of: receiving a plurality of aperiodic SRS configuration information from the base station; receiving an aperiodic SRS transmission triggering indicator from the base station; selecting the specific aperiodic SRS configuration information among the plurality of aperiodic SRS configuration information on the basis of at least one among a sub-frame index for receiving the aperiodic SRS transmission triggering indicator, a time relation between the aperiodic SRS transmission sub-frames, and an uplink channel state; and transmitting an aperiodic SRS for the aperiodic SRS transmission triggering indicator on the basis of the selected aperiodic SRS configuration information, the plurality of aperiodic SRS configuration information including the information about a resource for transmitting the aperiodic SRS corresponding to the aperiodic SRS transmission triggering indicator. In addition, according to the present invention, the terminal can be used for receiving a power offset value for transmitting the aperiodic SRS from the base station and determining a transmission power value for transmitting the aperiodic SRS.

Claims

1-20. -20. (canceled)

21. A method of controlling a uplink transmission power for sounding reference signal (SRS) transmission at a user equipment (UE) in a wireless communication system, the method comprising:

receiving, at least one of a first power offset value for a first trigger type SRS transmission and a second power offset value for a second trigger type SRS transmission, from a base station (BS);

determining a uplink transmission power for the second trigger type SRS transmission using the second power offset value when the second trigger type SRS transmission is triggered; and

transmitting, the second trigger type SRS by the determined uplink transmission power, to the BS.

22. The method of claim 21, wherein the uplink transmission power for the second trigger type SRS transmission is determined by a subframe unit.

23. The method of claim 21, wherein the first trigger type SRS transmission is a periodic SRS transmission and the second trigger type SRS transmission is an aperiodic SRS transmission.

24. The method of claim 23, wherein the at least one of first power offset value and the second power offset value is received through a higher layer signaling.

25. The method of claim 24, wherein the first power offset value and the second power offset value is independently received from the BS.

26. A user equipment (UE) of controlling a uplink transmission power for a sounding reference signal (SRS) transmission in a wireless communication system, the UE comprising:

a receiver configured to receive at least one of a first power offset value for a first trigger type SRS transmission and a second power offset value for a second trigger type SRS transmission, from a base station (BS);

a processor configured to determine a uplink transmission power for the second trigger type SRS transmission using the second power offset value when the second trigger type SRS transmission is triggered; and

a transmitter configured to transmit the second trigger type SRS by the determined uplink transmission power to the BS.

27. The UE of claim 26, wherein the processor determines the uplink transmission power for the second trigger type SRS transmission by a subframe unit.

28. The UE of claim 26, wherein the first trigger type SRS transmission is a periodic SRS transmission and the second trigger type SRS transmission is an aperiodic SRS transmission.

29. The UE of claim 28, wherein the at least one of first power offset value and the second power offset value is received through a higher layer signaling.

30. The UE of claim 29, wherein the first power offset value and the second power offset value is independently received from the BS.