无线CDMA数据网络中功率控制的非合作博弈方法

Non-cooperative power control in the wireless CDMA data network

宽带码分多址 (WCDMA)网络中功率控制是进行资源管理的核心手段。该文在 Goodm an的研究基础上提出了一种新的功率控制方法。无线数据网络中各个用户得到的服务质量用效用函数来表示 ,分布式功率控制被描述为一个非合作博弈的过程 ,控制策略是为了寻找达到“Nash均衡”点的一组发射功率 ,价格函数的引入提高了系统的效率。文中提出了一个新的价格函数——能够根据系统拥塞状态自动调整的价格函数。在此价格函数中 ,利用等效带宽来反映系统当前的资源消耗情况 ,通过动态地对各个用户施加价格使系统的运行效率大为提高。

Power control has become the central mechanism for resource allocation in wideband code division multiple access networks. A new non cooperative power control scheme is proposed based on the work of Goodman in which the quality of service of each mobile station is referred to as the 'utility function' and the distributed power control problem is a 'non cooperative game'. The aim of the power control algorithm is to find a transmitted power vector which corresponds to the point of 'Nash Equilibrium' and the algorithm efficiency is improved by introducing a 'price function'. A new price function which can adapt to the network congestion and the amount of network resources consumed was developed based on the effective bandwidth. The system efficiency was improved by charging each user a suitable price. Simulation results are given using the new algorithm.