摘要
在多媒体CDMA网络中,需要对用户的功率进行控制,既保证每个用户的QoS要求,又不增加对其它用户的干扰,同时还要对用户的数据速率进行控制,以避免拥塞。将功率和速率控制等效为一个具有N个用户的非合作博弈,用效用函数表征用户对系统服务质量的满意程度,用代价函数描述达到通信要求所消耗的无线资源,从而将联合功率与速率控制算法描述为最大化净效用函数(效用函数和代价函数之差)的过程,最终得到系统中各用户全局最佳数据传输速率和达到服务质量所需的最小发射功率组合,并证明了纳什均衡的存在性。
The users’ transmission power in the CDMA network should be controled,thus not only ensuring the QoS demand of each user,but also decreasing the interference on other user.Meanwhile,the users’ data transmission rate should be controled in order to avoid the congestion.In this paper,the power and rate control is regarded as a non-cooperative game with N users.The utility function is used to denote the satisfaction degree of the service quality for users,while the pricing function to denote the radio resource consumed by the users.So the joint power and rate control algorithm is described as the process for maximizing the net utility function（utility minus pricing）.Finally,the combination of global optimal rate and the minimum transmission power in achieving the service quality is obtained.Also,the existence of Nash Equilibrium is confined.
出处
《通信技术》
2010年第6期160-162,共3页
Communications Technology
基金
国家自然科学基金项目(批准号:60873099)
广州市科技计划项目(编号:2007J1-C0501)
关键词
功率控制
非合作博弈
效用函数
纳什均衡
power control
non-cooperative game-theory
utility function
Nash equilibrium
