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Method and device for submitting power headroom report (PHR)

A technology of power headroom reporting and power headroom, applied in the field of communication, can solve the problem of not being able to accurately know the power remaining of the UE

Active Publication Date: 2012-03-14
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is to say, in the current case of reporting PHR based on CC, the base station cannot accurately know the remaining power of the UE.

Method used

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  • Method and device for submitting power headroom report (PHR)
  • Method and device for submitting power headroom report (PHR)
  • Method and device for submitting power headroom report (PHR)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 of the present invention provides a method for reporting a power headroom report, such as Figure 4 shown, including the following steps:

[0040] Step 401, obtaining the maximum power drop value MPR generated when the user terminal works on multiple carriers;

[0041] Step 402, calculate the PHR based on the user terminal according to the configured power headroom report PHR calculation formula of the user terminal and the MPR;

[0042] Step 403, reporting the calculated PHR of the user terminal to the base station.

[0043] The formula for calculating the PHR is:

[0044] PHR_ue=Pcmax-Ppusch1-Ppusch2-...-Ppuschn-Ppucch-multiple_CC_MPR;

[0045] Wherein, Pcmax is the maximum transmit power of the user terminal, Ppuschn is the PUSCH power on CCn, n is a natural number, Ppucch is the transmit power of PUCCH (Physical Uplink ControlChannel, physical uplink control channel) on the main carrier, and multiple_CC_MPR is a multiple CC MPR caused by sending.

...

Embodiment 2

[0062] Embodiment 2 of the present invention provides a method for reporting a power headroom report.

[0063] The report of the power headroom report is a UE-based PHR report. First, the calculation method of the PHR is introduced.

[0064] Specifically, in the single-carrier system of LTE, there is currently only one carrier's PHR. In the case of multi-carrier operation, the UE will maintain a PHR for each CC. At this time, there are two types of calculation methods for the PHR of the CC:

[0065] Type 1: PHR PUSCH =Pcmax,c-Ppusch(1)

[0066] Type 2: PHR PUCCH+PUSCH =Pcmax, c-Ppusch-Ppucch (2)

[0067] Considering the MPR generated when multiple CCs are sent together (the MPR is called multiple_CC_MPR in the embodiment of the present invention), and Pcmax,c includes the complete multiple_CC_MPR when calculating the PHR of each CC, therefore, the formula for calculating the PHR of the CC becomes for:

[0068] Type 1: PHR PUSCH =Pcmax, c-Ppusch-multiple_CC_MPR (3)

[00...

Embodiment 3

[0089] Embodiment 3 of the present invention provides a method for reporting a power headroom report, which triggers UE PHR reporting when multiple CCs transmit together.

[0090] It is assumed that the UE works on two uplink CCs at the same time, and the two uplink CCs belong to the same PA. When two CCs are sent together, the PHR of the CC is triggered, and the PHR of the UE is also triggered. At this time, the multiple_CC_MPR sent together by the two uplinks is 3bd (other types of MPR or A_MPR are ignored). The maximum power level of UE is 23bdm, and the transmission power of PUSCH on the first CC is 10dbm. The PUSCH transmission power on the second CC is 7dbm. At this time, if the PHR calculation of each CC considers the MPR sent by the two CCs together, the PHR on CC1 is PHR=23-10-3=10db. The PHR of CC 2 is PHR=23-7-3=13db.

[0091] In this case UE's PHR_ue=23-10-7-3=3db. The PHR of this UE adopts the new LCID to identify. In this way, the base station can know that...

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Abstract

The invention discloses a method and a device for submitting a power headroom report (PHR). The method comprises the following steps of: acquiring maximum power reduction (MPR) which is generated when a user terminal operates in a plurality of carriers; according to a configured PHR calculation formula of the user terminal and the MPR, calculating the PHR based on the user terminal; and submitting the PHR, which is obtained by calculation, of the user terminal to a base station. In the invention, when the user terminal operates in the plurality of carriers, the PHR based on the user terminal is calculated and submitted to the base station, so that the base station can accurately acquire the power headroom of the user terminal according to the received PHR based on the user terminal.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for power headroom reporting. Background technique [0002] In LTE (Long Term Evolution, long-term evolution) and previous wireless communication systems, there is only one carrier in a cell, and the maximum bandwidth in the LTE system is 20MHz, such as figure 1 shown. In the LTE-A (LTE Advanced, the subsequent evolution of LTE technology) system, the peak rate of the system is greatly improved compared with LTE, and it is required to reach 1Gbps in the downlink and 500Mbps in the uplink. If only one carrier with a maximum bandwidth of 20MHz is used, the peak rate requirement cannot be met. Therefore, the LTE-A system needs to expand the bandwidth that the terminal can use, thus introducing the CA (Carrier Aggregation, Carrier Aggregation) technology, which is to aggregate multiple continuous or discontinuous carriers under the same eNB (base station), and at the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04W52/00
CPCH04W52/365
Inventor 杨晓东
Owner DATANG MOBILE COMM EQUIP CO LTD
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