TD-SCDMA系统接入控制算法研究

The study of Call Admission Control in TD-SCDMA

接入控制是移动网络为接入用户提供服务质量保证的一个重要手段。文章讨论了TD-SCDMA系统的传统理论控制方法,从理论上分析多用户检测因子对TD-SCDMA系统上行链路负载及相邻小区间干扰的影响,同时考虑相邻小区间干扰对接入控制的影响。基于理论公式,在上行链路引入小区间干扰,对传统接入控制算法进行一些改进,通过仿真结果显示,改进后的算法能更好的提供接入用户服务质量。

CAC （ Call Admission Control） is an important method for providing the QoS of user in mobile communication. In this paper, the formula of tradition theory in TD - SCDMA is studied, and the affect of MUD（ Multi - User Detection） to the burden on Uplink and the noise of adjacent cells is analyzed. The effect of adjacent cells＇noise to CAC is being analyzed furthermore, so based on the formula of traditional theory, the noise of adjacent cells is being introduced and algorithm of tradition CAC is improved in this paper.