Method and device for reporting power margin information

A technology of power margin and protocol data unit, applied in the direction of transmission control/equalization, etc., can solve problems such as PH inconsistency, error, and inconsistency in PH information understanding, and achieve the effect of improving consistency

Active Publication Date: 2010-06-09
DATANG MOBILE COMM EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

[0008] In the above method of reporting PH information, if the preset threshold of the path loss change range is set relatively large, or the PH reporting period is set long, the interval between two PH information acquisitions by the base station may be relatively long
During this long time interval, the base station and the UE will respectively maintain the PH information saved by them. During this period, the base station may adjust the transmit power of the UE through the TPC power control adjustment command word, and the TPC There may be errors in the actual transmission of the power control adjustment command word, causing the Ppusch adjusted by the UE according to the wrong TPC power control adjustment command word to be inconsistent with the Ppusch understood by the base station. PH will also be inconsistent
[0009] It can be seen that the existing methods of reporting PH information may cause inconsistencies between the understanding of PH information by the base station and the UE

Method used

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  • Method and device for reporting power margin information

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Embodiment 1

[0031] Embodiment one of the inventive method mainly comprises the following steps:

[0032] Step 101. When the number of remaining bits in the MAC PDU sent by the UE to the base station is greater than or equal to the number of bits occupied by the PH information, and the MAC PDU does not contain the PH information corresponding to this transmission, the UE uses the MAC The remaining bits of the PDU notify the base station of the PH information corresponding to this transmission.

[0033]The remaining bits refer to the unfilled bits after placing all valid data, filled BSR CE information, and corresponding MAC PDU subheader information in the MAC PDU of a preset length. This part of bits is in the existing protocol. Filled with padding bits.

[0034] Here, the PH information is usually carried by the PH CE in the MAC PDU. Therefore, usually only when the remaining bits in the MAC PDU allow at least one PH CE, the MAC PDU can carry the PH information. That is to say, when th...

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Abstract

The invention provides a method and a device for reporting power margin information. The method comprises the following step that: user equipment (UE) informs a base station of the PH information by using residual bits in a media access control sub-layer protocol data unit (MACPDU) when the number of the residual bits in the MACPDU sent to the base station by the UE is greater than or equal to the number of the bits occupied by the PH information and when the MACPDU does not include corresponding PH information sent this time. The method and the device for reporting power margin information can enable the base station to know practical power margin information of the UE in time so as to enhance the uniformity of the base station and the UE for understanding the PH information.

Description

technical field [0001] The invention relates to power control technology in a mobile communication system, in particular to a method and device for reporting power headroom (PH) information. Background technique [0002] In an existing Long Term Evolution (LTE) system, PH information is information used to identify UE-side power headroom. This information is obtained by the UE according to the formula PH=Pmax-Ppusch. Wherein, PH is the power headroom, Pmax is the maximum transmission power of the UE, and Ppusch is the power used by the uplink shared channel (PUSCH) carrying the PH information. In practical applications, the UE will adjust the Ppusch according to the TPC power control adjustment command word of the PUSCH channel generated by the physical layer. Here, the TPC power control adjustment command word is mainly generated by the base station by comparing the actual received signal on the UE’s uplink PUSCH channel with the system preset target value. If the receive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005
Inventor 许芳丽谌丽
Owner DATANG MOBILE COMM EQUIP CO LTD
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