LTE—A上行链路联合功率控制方案

LTE—A上行功率控制技术在补偿用户小区内路径损耗和降低小区间干扰方面发挥很大的作用。针对PUSCH（physical uplink shared channel，物理上行共享信道）功率控制方案进行了研究，考虑到边缘用户功率过小出现的解错问题，提出一种改进的开环和闭环联合控制的功率控制方案。闭环功率控制方案中，对基于上报的功率余量处理方案进行改进，改进方案考虑了每个资源块功率余量，并合理地设置了目标信干噪比的取值范围；同时，对开环功率控制中两个开环参数部分路损补偿因子“和小区特定参数P。的选取作了进一步的规范。实验结果表明，改进的方案在小区吞吐量方面性能更优。...

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Bibliographic Details
Published in计算机应用研究 Vol. 34; no. 6; pp. 1817 - 1819
Main Author 刘可文 杨知桃 熊红霞
Format Journal Article
LanguageChinese
Published 武汉理工大学信息工程学院,武汉,430070%武汉理工大学土木工程与建筑学院,武汉,430070 2017
Subjects
LTE—A
功率余量
功率控制
吞吐量
开环参数
开环参数
功率余量
power headroom report (PHR)
open loop parameter
LTE-A
power control
功率控制
吞吐量
throughput
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ISSN1001-3695
DOI10.3969/j.issn.1001-3695.2017.06.049

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Summary:LTE—A上行功率控制技术在补偿用户小区内路径损耗和降低小区间干扰方面发挥很大的作用。针对PUSCH（physical uplink shared channel，物理上行共享信道）功率控制方案进行了研究，考虑到边缘用户功率过小出现的解错问题，提出一种改进的开环和闭环联合控制的功率控制方案。闭环功率控制方案中，对基于上报的功率余量处理方案进行改进，改进方案考虑了每个资源块功率余量，并合理地设置了目标信干噪比的取值范围；同时，对开环功率控制中两个开环参数部分路损补偿因子“和小区特定参数P。的选取作了进一步的规范。实验结果表明，改进的方案在小区吞吐量方面性能更优。
Bibliography:LTE-A; power control; power headroom report （PHR） ; open loop parameter; throughput
51-1196/TP
Liu Kewen1, Yang Zhitao1, Xiong Hongxia2 （ 1. School of Information Engineering, 1. School of Civil Engineering ＆ Architecture, Wuhan University of Technology, Wuhan 430070, China）
Power control for uplink in LTE-A played a significant role in compensating the path loss of intra-ce11 users and mitigating inter-cell interference. Considering the lower power value of edge users might lead to the wrong demodulation of resource block（RB） in uplink, this paper proposed an improved power control scheme combined with open loop power control and closed loop power control in PUSCH. With the closed looppower control scheme, this work improved the power headroom report-based algorithm, which took the power margin for each RB into consideration. And it also set the range of target signal to interference plus noise ratio reasonably. While this paper also further specified the two open loop parameters that path loss compensation fac
ISSN:1001-3695
DOI:10.3969/j.issn.1001-3695.2017.06.049