Method for reporting power headroom

A power headroom and link technology, applied in the field of communication, can solve unresolved problems

Inactive Publication Date: 2014-05-07
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PHR report of the cellular link can continue to use the existing technology, but how to realize the PHR report of the D2D link is still an unsolved problem

Method used

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  • Method for reporting power headroom
  • Method for reporting power headroom
  • Method for reporting power headroom

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] In the embodiment of the present invention, the eNB configures D2D PHR parameters for the UE, and when the trigger condition is met, the UE triggers the D2D PHR, and the UE reports the D2D PHR to the eNB. The UE reports the power headroom information on the D2D link to the eNB, so that the eNB can perform resource scheduling and power control on the D2D link based on the information.

[0044] See attached Figure 4 It is a schematic flowchart of a method for reporting a power headroom, which specifically includes the following steps:

[0045] In step 401, the eNB configures D2D PHR parameters for the UE through RRC signaling.

[0046] The D2D PHR is the difference between the UE's nominal maximum transmit power on the D2D lin...

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PUM

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Abstract

The invention discloses a method for reporting power headroom. The method comprises steps: an eNB configures D2D PHR parameters for a UE via RRC signaling, and the D2D PHR parameters comprise a periodic D2D PHR timer, a prohibit D2D PHR timer and a D2D link path loss change door limit; when triggering conditions are met, the UE triggers the D2D PHR, and the triggering conditions comprise a first triggering condition; overtime happens to the periodic D2D PHR timer; and information of configuring the D2D PHR parameters is received. The first triggering conditions comprise that the UE has cellular uplink resources for transmitting new data, overtime happens to the prohibit D2D PHR timer, and when the D2D PHR is transmitted last time, the path loss change value of the D2D link is larger than the D2D link path loss change door limit. When the embodiment of the invention is applied, the power headroom information on the D2D link can be known by the eNB, and resource scheduling and power control can be carried out on the D2D link.

Description

technical field [0001] The present application relates to the technical field of communications, and more specifically, to a method for reporting power headroom. Background technique [0002] In the existing LTE system, the data transmission between two UEs is realized through the relay on the network side. The sending end user (UE) first sends the communication data to the network side, and then the network side forwards the data to the receiving end UE. Even if two UEs that are close to each other want to communicate, the communication data must be transmitted by the network side before being sent to the other party. The introduction of device-to-device (D2D) technology is aimed at the application scenario where the distance between the sending UE and the receiving UE is relatively close. At this time, the communication data can be directly transmitted between the two UEs, without the need for relaying on the network side. [0003] The introduction of D2D technology can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04W52/00H04W72/12
CPCH04W52/383H04W52/365
Inventor 张欢高伟东池连刚
Owner POTEVIO INFORMATION TECH CO LTD
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