非完备功控CDMA无线网络上行准入控制算法及性能分析

Admission Control for Imperfect Power Controlled Multimedia CDMA Uplink Channel

本文研究了非完备功控宽带CDMA无线网络上行准入控制问题。首先为非完备功控CDMA网络上行链路建立了系统模犁,然后设计相应的准入控制算法,其中无线资源被划分为供各类用户专用的部分和在各类用户之间共享的部分。为了利用非实时用户可以容忍延时的特点,又引入了队列结构以降低阻塞率。通过对算法进行Markov分析,从理论上计算了用户阻塞率和半均吞叶率性能。仿真结果验证了理论模型的正确性。

The approach of admission control for the imperfect power-controlled multimedia CDMA uplink channel is studied. For this purpose, appropriate system model is built. Channel resource is allotted as bandwidths only for real-time data and non-real-time data users as well as a shared bandwidth for all users. Because time-delay is tolerable for non-real-time users, a queuing mechanism is adopted to decrease the probability of traffic congestion. Based on the Markov analysis, some aspects of system performance such as the probability of traffic congestion and average throughput is derived. Correctness of proposed theoretical model is validated by the result of simulation.