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LTE-Advanced system-based uplink power adjustment method

A power adjustment and power technology, which is applied in power management, energy-saving ICT, electrical components, etc., can solve the problem of unsatisfactory initial power, achieve the effects of short operation delay, simple algorithm, and guaranteed spectrum utilization

Inactive Publication Date: 2013-10-23
BEIJING JIAOTONG UNIV
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  • Claims
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Problems solved by technology

[0014] Aiming at the problem that the initial power of the uplink TPC does not meet the UE limit when the carrier aggregation technology is adopted in the LTE-Advanced system, the present invention proposes a power adjustment method that takes both performance and complexity into account

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  • LTE-Advanced system-based uplink power adjustment method
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  • LTE-Advanced system-based uplink power adjustment method

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] 1. Classification module

[0042] The classification module selects CCs that prioritize power adjustments. The classification standard is the numerical difference between the initial power of TPC and the transmitted power before TPC. Uplink TPC is jointly determined by cell-specific parameters or UE-specific parameters, path loss, allocated resource block size, MCS and closed-loop correction function, so this module uses TPC results to characterize CC characteristics. When the difference between the initial power of TPC and the transmit power before TPC is positive, it means that the power before TPC is not enough to support this transmission, and it is required to increase the power; otherwise, it means that the power before TPC has a margin, and the power can be reduced or maintained. The adjustment strategy of the present invention is to meet the demands of...

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Abstract

The invention provides an uplink power adjustment method, which is applied to an LTE-Advanced system adopting a frequency spectrum polymerization technology and belongs to a resource distribution part of uplink subcarrier power. The invention mainly comprises the following steps: firstly, calculating out the TPC initial power PPUSCH, k and PPUCCH, K of PUSCH and PUCCH in accordance with an uplink power control formula and judging weather the TPC initial power values meet the limited conditions of maximum transmitting power; and if the result is not qualified with the conditions, carrying out the following steps: adopting a two-classification method or an N-classification method to classify the subcarriers, allocating and adjusting collective adjustment power of offset to the maximum priority and judging whether the adjusting result meets the limited power of the minimum transmitting power. The invention takes the numerical difference of the TPC initial results and the TPC former power to reduce the power, thereby taking into account of the losses of throughput to the extent; the invention considers the minimum transmitting power values of the subcarriers, ensures transmission of PUCCH data and indirectly guarantees utilization rate of the frequency spectrum. The invention is no need of extra control signaling overhead and has simple algorithm, short arithmetic time delay and easy realization.

Description

technical field [0001] The invention is applied in the LTE-Advanced system adopting the frequency spectrum aggregation technology, and belongs to the uplink sub-carrier power resource allocation part. Background technique [0002] The minimum system bandwidth supported by the LTE-A (Long Term Evolution-Advanced, LTE-A) system is 20 MHz, and the maximum bandwidth reaches 100 MHz. Considering the existing spectrum allocation method and planning, in order to support such a large bandwidth requirement, 3GPP proposes to adopt a spectrum aggregation (spectrum aggregation, SA) technology to solve the requirement of frequency band resources. Spectrum aggregation is a technology capable of extending multiple contiguous or non-contiguous LTE carriers into transmission carriers of the LTE-A system. [0003] The uplink power control using SA technology in the LTE-Advanced system is similar to that of Release'8, refer to "3GPP Long Term Evolution (LTE) Technology Principles and System D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/14
CPCY02B60/50
Inventor 叶海纳谈振辉徐少毅乔晓瑜张华晶黄清赵超
Owner BEIJING JIAOTONG UNIV
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