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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。
In multimedia CDMA networks, the user’s power needs to be controlled to ensure QoS requirements of each user without increasing interference to other users, and meanwhile, the user’s data rate needs to be controlled to avoid congestion. The power and rate control are equivalent to a non-cooperative game with N users. The utility function is used to characterize the users’ satisfaction with the service quality of the system. The cost function is used to describe the radio resources consumed by the communication requirements, so that the combined power and rate The control algorithm is described as a process of maximizing the net utility function (the difference between the utility function and the cost function), and finally the global optimum data transmission rate of each user in the system and the minimum transmit power combination required to achieve the quality of service are obtained. It is also proved that Nash equilibrium The existence of.