中国邮电高校学报(英文) ›› 2012, Vol. 19 ›› Issue (4): 14-21.doi: 10.1016/S1005-8885(11)60277-X

• Networks • 上一篇    下一篇

Coverage and capacity optimization in LTE network based on non-cooperative games

许森1,候萌牛凯1,贺志强1,吴伟陵1   

  1. 1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications 2. School of Electronic Engineering and Automation, Shandong Polytechnic University
  • 收稿日期:2011-09-26 修回日期:2012-03-26 出版日期:2012-08-31 发布日期:2012-09-12
  • 通讯作者: 许森 E-mail:xusen820322@yahoo.com.cn
  • 基金资助:

    新一代宽带无线移动通信网重大专项项目;北京市科委重大科技成果转化落地项目

Coverage and capacity optimization in LTE network based on non-cooperative games

  1. 1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications 2. School of Electronic Engineering and Automation, Shandong Polytechnic University
  • Received:2011-09-26 Revised:2012-03-26 Online:2012-08-31 Published:2012-09-12

摘要:

As one of the key use cases in Long Term Evolution Self-Organization Network (LTE SON), the coverage and capacity optimization (CCO) is the technology which provides the optimal coverage and capacity performance support high-data-rate service and decrease the operator capital expenditures (CAPEX) and operational expenditures (OPEX). In LTE system, some factors (e.g. load, traffic type, user distribution, uplink power setting, inter-cell interference and etc) limit the coverage and capacity performance. From the view of single cell, it always pursuits maximize performance of coverage and capacity by optimizing the uplink power setting and intra-cell resource allocation, but this may result in decreasing the performance of its neighbor cells. Therefore, the benefit of every cell conflicts each other. In order to tradeoff the benefit of every cell and maximize the performance for the whole network, this paper proposes a multi-cell uplink power allocation scheme based on non-cooperative games. The scheme aims to make the performance of coverage and capacity balanced by negotiation of the uplink power parameters among multi-cells. So the performance of every cell can reach the Nash equilibrium, making it feasible to reduce the inter-cell interference by setting an appropriate uplink power parameter. Finally, the simulation shows the proposed algorithm can effectively enhance the performance of coverage and capacity in LTE network.

关键词:

coverage and capacity, power control, non-cooperative game, Nash equilibrium

Abstract:

As one of the key use cases in Long Term Evolution Self-Organization Network (LTE SON), the coverage and capacity optimization (CCO) is the technology which provides the optimal coverage and capacity performance support high-data-rate service and decrease the operator capital expenditures (CAPEX) and operational expenditures (OPEX). In LTE system, some factors (e.g. load, traffic type, user distribution, uplink power setting, inter-cell interference and etc) limit the coverage and capacity performance. From the view of single cell, it always pursuits maximize performance of coverage and capacity by optimizing the uplink power setting and intra-cell resource allocation, but this may result in decreasing the performance of its neighbor cells. Therefore, the benefit of every cell conflicts each other. In order to tradeoff the benefit of every cell and maximize the performance for the whole network, this paper proposes a multi-cell uplink power allocation scheme based on non-cooperative games. The scheme aims to make the performance of coverage and capacity balanced by negotiation of the uplink power parameters among multi-cells. So the performance of every cell can reach the Nash equilibrium, making it feasible to reduce the inter-cell interference by setting an appropriate uplink power parameter. Finally, the simulation shows the proposed algorithm can effectively enhance the performance of coverage and capacity in LTE network.

Key words:

coverage and capacity, power control, non-cooperative game, Nash equilibrium

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