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计算机工程

• 移动互联与通信技术 • 上一篇    下一篇

认知无线电中基于博弈论方法的联合功率速率控制

王贻彬,倪卫明   

  1. (复旦大学通信科学与工程系,上海200433)
  • 收稿日期:2013-08-12 出版日期:2014-09-15 发布日期:2014-09-12
  • 作者简介:王贻彬(1989-),男,硕士研究生,主研方向:移动通信,功率控制,博弈论;倪卫明,副教授。

Joint Power and Rate Control Based on Game-theoretic Approach in Cognitive Radio

WANG Yi-bin,NI Wei-ming   

  1. (Department of Communication Science and Engineering,Fudan University,Shanghai 200433,China)
  • Received:2013-08-12 Online:2014-09-15 Published:2014-09-12

摘要: 在认知无线电网络中,认知用户在满足目标信干比的前提下,采用非合作博弈的方法以降低每个认知用户的发送功率。为解决认知无线电中共享频谱状态下的联合功率和速率控制问题,将系统中次级用户间的关系假定为非合作的竞争性关系,同时考虑次级用户对主用户的干扰容限,提出一种基于次级用户传输时延花费的非合作博弈联合功率速率控制算法,并证明该算法纳什均衡的存在性与唯一性。仿真结果表明,该算法可使用户在使用较小传输功率的情况下获得较高的效用值与较低的传输延时,同时使次级用户对主用户的干扰小于干扰阈值。

关键词: 认知无线电, 非合作博弈, 联合控制, 时延花费, 代价函数

Abstract: In Cognitive Radio(CR) networks,under the premise of cognitive users satisfying the target SINR,in order to reduce each user’s transmit power,non-cooperative game can be used. This paper studies joint control of power and rate for CR in the underlay type. It assumes the problem between Secondary Users(SUs) as a Non-cooperative Game (NG),and one joint control of power and rate alogorithm which is based on Delay Cost(DC) of SUs is proposed. It subjects to the tolerable interference limits,and proves the existence and uniqueness of the proposed alogorithm’s Nash Equilibrium(NE). Simulation results show that the alogorithm can attain higher utility and lower transmission delay using lower power,and sum interference made by the SUs can not exceed interference threshold.

Key words: Cognitive Radio(CR), Non-cooperative Game(NG), joint control, Delay Cost(DC), pricing function

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