METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR

• US 20160242125A1
• Filed: 11/10/2014
• Published: 08/18/2016
• Est. Priority Date: 11/09/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: LEE, Seungmin, SEO, Hanbyul
• Granted Patent: US 9,554,339 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/246 where the output power of a terminal is based on a path parameter calculated in said terminal
• CPC Class Codes: H04W 52/248 where transmission power control commands are generated based on a path parameter
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/58 Format of the TPC bits
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

The present invention relates to a method for controlling uplink transmission power of a terminal in a wireless communication system, the method comprising the steps of: transmitting an uplink signal according to a predetermined uplink-downlink configuration with respect to a serving cell, receiving first transmission power control information for a first set of uplink sub-frames and second transmission power control information for a second set of uplink sub-frames from the serving cell, and transmitting a physical uplink shared channel (PUSCH) on a particular sub-frame included in the second set of uplink sub-frames, according to the second transmission power control information, wherein the second set of uplink sub-frames is configured by at least one uplink sub-frame specified by a upper layer signaling among a plurality of uplink sub-frames according to the predetermined uplink-downlink configuration.

Claims

1. A method of controlling uplink transmission power by a user equipment in a wireless communication system, comprising the steps of:

transmitting an uplink signal according to an uplink-downlink configuration predetermined to a serving cell;

receiving first transmission power control information on a first uplink subframe set and second transmission power control information on a second uplink subframe set from the serving cell; and

transmitting an uplink data channel (physical uplink shared channel, PUSCH) in a specific subframe contained in the second uplink subframe set according to the second transmission power control information,

wherein the second uplink subframe set comprises at least one or more uplink subframes designated by higher layer signaling among a plurality of uplink subframes according to the predetermined uplink-downlink configuration.

2. The method of claim 1, wherein the second transmission power control information comprises a value indicating a current PUSCH power control adjustment state for an index of the specific subframe.

3. The method of claim 2, wherein if information on the second uplink subframe set is received, the current PUSCH power control adjustment state is reset.

4. The method of claim 2, wherein if information on the second uplink subframe set is received, the current PUSCH power control adjustment state is set to 0.

5. The method of claim 1, wherein the first uplink subframe set corresponds to a subframe of which a usage of a radio resource is configured not to be changed and wherein the second uplink subframe set corresponds to a subframe of which a usage of a radio resource is configured to be changed.

6. The method of claim 1, wherein the first uplink subframe set and the second uplink subframe set are different from each other in an interference characteristic with a neighbor cell.

7. The method of claim 1, wherein the second uplink subframe set is indicated by a usage change message.

8. The method of claim 1, wherein the specific subframe is indicated by downlink control information in a DCI format 0/4.

9. A user equipment controlling uplink transmission power in a wireless communication system, comprising:

a radio frequency unit; and

a processor, the processor configured to transmit an uplink signal according to an uplink-downlink configuration predetermined to a serving cell, the processor configured to receive first transmission power control information on a first uplink subframe set and second transmission power control information on a second uplink subframe set from the serving cell, the processor configured to transmit an uplink data channel (physical uplink shared channel (PUSCH)) in a specific subframe contained in the second uplink subframe set according to the second transmission power control information,

wherein the second uplink subframe set comprises at least one or more uplink subframes designated by higher layer signaling among a plurality of uplink subframes according to the predetermined uplink-downlink configuration.

10. The user equipment of claim 9, wherein the second transmission power control information comprises a value indicating a current PUSCH power control adjustment state for an index of the specific subframe.

11. The user equipment of claim 10, wherein if information on the second uplink subframe set is received, the current PUSCH power control adjustment state is reset.

12. The user equipment of claim 10, wherein if information on the second uplink subframe set is received, the current PUSCH power control adjustment state is set to 0.

13. The user equipment of claim 9, wherein the first uplink subframe set corresponds to a subframe of which a usage of a radio resource is configured not to be changed and wherein the second uplink subframe set corresponds to a subframe of which a usage of a radio resource is configured to be changed.

14. The user equipment of claim 9, wherein the first uplink subframe set and the second uplink subframe set are different from each other in an interference characteristic with a neighbor cell.

15. The user equipment of claim 9, wherein the second uplink subframe set is indicated by a usage change message.

16. The user equipment of claim 9, wherein the specific subframe is indicated by downlink control information in a DCI format 0/4.