【摘要】 在对综合业务CDMA系统建模与分析的基础上,对该系统提出了一种具有服务质量保证的呼叫允许控制方案,并对其进行了仿真与性能分析。针对下一代无线蜂窝网中三种主要业务类型(话音、视频、数据)不同的QoS要求,该方案以用户信噪比、系统溢出率为主要判据,通过记录新呼叫到达前系统溢出率的大小,结合用户当前SIR的情况,判决新呼叫是否接入,并针对三种业务给出不同的优先级。更多还原

【Abstract】 A QoS-based call admission control scheme was proposed after modeling and analyzing the multi-traffic in CDMA system. The simulation results and system performance analysis were given out. Considering three different types of traffic (voice, video, and data) and their QoS requirements in the next generation wireless cellular networks, users’ signal-to-interference ratio, and the system overflow rate recorded by the system before the new call arrival were adopted as the new call admission criterions. Then the different admission priorities were assigned to three types of traffic separately.更多还原