Method of transmitting power headroom reporting in wireless communication system

• US 20090318180A1
• Filed: 06/17/2009
• Published: 12/24/2009
• Est. Priority Date: 06/18/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yi, Seung-June, Park, Sung-Jun, Lee, Young-Dae, Chun, Sung-Duck
• Granted Patent: US 9,125,164 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network

Abstract

Disclosed is related to a method of effectively transmitting a power headroom report (PHR) from the terminal to the base station in an evolved universal mobile telecommunications system (E-UMTS) evolved from universal mobile telecommunications system (UMTS) or a long term evolution (LTE) system, and more particularly, to a method of providing the power headroom report after determinations of whether the power headroom reporting is triggered and whether allocated uplink resource(s) accommodate a medium access control (MAC) control element.

Claims

1. A method of providing a power headroom reporting (PHR) in wireless communications system, the method comprising:

determining whether the power headroom reporting is triggered;

determining whether allocated uplink resources accommodate a medium access control (MAC) control element related to the power headroom reporting if at least one power headroom reporitng is determined to be triggered; and

transmitting the MAC control element based on a value of a power headroom if the allocated uplink resources are determined to accommodate the MAC control element.

2. The method of claim 1, wherein the MAC control element is included in a MAC protocol data unit (PDU).

3. The method of claim 1, wherein the MAC control element is a PHR MAC control element.

4. The method of claim 1, wherein the power headroom reporting is triggered by at least one of a path loss changes, a periodic timer for a PHR transmission, and a configuration or reconfiguration of the PHR functionality.

5. The method of claim 4, wherein the power headroom reporting is triggered if the path loss is changed more than a threshold value.

6. The method of claim 4, wherein the power headroom reporting is triggered if the periodic timer for the PHR trnamsision expires.

7. The method of claim 4, wherein the power headroom reproting is not triggered if the reconfiguration of the PHR functionality is used to disable the function.

8. The method of claim 1, wherein the allocated uplink resources accommodate the MAC control element as a result of logical channel prioritization.

9. The method of claim 1, wherein the value of the power headroom is obtained from a physical layer.