POWER HEADROOM REPORTING METHOD IN WIRELESS COMMUNICATION SYSTEM SUPPORTING CHANGE IN USE OF WIRELESS RESOURCE AND APPARATUS FOR SAME

• US 20160142984A1
• Filed: 04/22/2014
• Published: 05/19/2016
• Est. Priority Date: 04/22/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: LEE, Seungmin, YANG, Suckchel, CHAE, Hyukjin, HWANG, Daesung, SEO, Inkwon, SEO, Hanbyul
• Granted Patent: US 10,080,203 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

The present invention proposes a power headroom reporting method and apparatus of a terminal in a wireless communication system supporting a change in use of wireless resources. More particularly, the method comprises the steps of: determining whether power headroom reporting is triggered; and transmitting power headroom reporting (PHR) information for first upper link wireless resource and second upper link wireless resource to a base station, wherein the first upper link wireless resource is configured to allow the use of the wireless resource to be dynamically changed and the second upper link wireless resource is configured to prevent the use of the wireless resources from being dynamically changed.

Claims

1. A method of performing power headroom reporting in a wireless communication system supporting usage change of a radio resource, comprising the steps of:

determining whether the power headroom reporting is triggered; and

transmitting power headroom reporting (PHR) information on a first uplink (UL) radio resource and a second UL radio resource to a base station,

wherein the first UL radio resource is configured to dynamically change usage of a radio resource and wherein the second UL radio resource is configured not to dynamically change the usage of the radio resource.

2. The method of claim 1, wherein the power headroom reporting (PHR) information comprises a first PHR value for the first UL radio resource and a second PHR value for the second UL radio resource and wherein the first PHR value and the second PHR value are determined in a manner of being independent from each other.

3. The method of claim 1, wherein the power headroom reporting (PHR) comprises a representative power headroom reporting (PHR) value and wherein the representative PHR value corresponds to a smaller PHR value among a first PHR value for the first UL radio resource and a second PHR value for the second UL radio resource.

4. The method of claim 1, further comprising the step of receiving information related to reference maximum power from the base station,

wherein the reference maximum power is set to the first UL radio resource and the second UL radio resource, respectively, and wherein the power headroom reporting (PHR) information is determined based on the reference maximum power.

5. The method of claim 1, wherein the power headroom reporting (PHR) is configured to be transmitted via a predetermined UL radio resource only when uplink data (physical uplink shared channel (PUSCH)) is transmitted.

6. The method of claim 1, wherein the power headroom reporting (PHR) is configured to be transmitted via a predetermined UL radio resource only when uplink data (physical uplink shared channel (PUSCH)) is transmitted.

7. The method of claim 1, wherein the power headroom reporting (PHR) is configured to be transmitted via a predetermined UL radio resource only when uplink data (physical uplink shared channel (PUSCH)) is transmitted.

8. The method of claim 1, wherein the power headroom reporting (PHR) is configured to be calculated for a single radio resource only among the first UL radio resource and the second UL radio resource.

9. The method of claim 1, further comprising the step of receiving an indicator indicating a specific UL radio resource from the base station.

10. The method of claim 1, further comprising the step of transmitting at least one or more fields on a specific signal format, which are received from the base station, in a manner of configuring the at least one or more fields as an indicator indicating a specific UL radio resource.

11. The method of claim 1, wherein the first UL radio resource and the second UL radio resource are configured to be commonly applied by a specific timer.

12. The method of claim 1, wherein the power headroom reporting (PHR) information is restricted to a type 1 PHR or a type 2 PHR.

13. The method of claim 1, wherein the power headroom reporting (PHR) information is derived based on a power control command until timing of receiving UL control information or timing of a UL frame in which actual PUSCH is transmitted.

14. A user equipment performing power headroom reporting in a wireless communication system supporting usage change of a radio resource, comprising:

a radio frequency unit; and

a processor, the processor configured to determine whether the power headroom reporting is triggered, the processor configured to transmit power headroom reporting (PHR) information on a first uplink (UL) radio resource and a second UL radio resource to a base station,

wherein the first UL radio resource is configured to dynamically change usage of a radio resource and wherein the second UL radio resource is configured not to dynamically change the usage of the radio resource.