3G系统基于区分业务的接入控制

DiffServ-based multimedia admission control arithmetic in 3G cellular systems

为提高无线接入控制过程的性能,针对WCDMA系统各种业务的特点,采用了能有效保障QoS的上行接入控制方案,依据具体业务的分类和QoS指标来分配网络资源,提出了一种新的接入算法-PCD(Priori-ty Code based Diffserv)算法.设计了实时和非实时业务呼叫的信令流程,并对提出的算法和现有的接入算法进行了仿真评估.结果表明,该方法有效地解决了上行接入控制问题,与随机接入算法相比具有良好的业务吞吐量和时延性能,提高实时业务的服务质量.

To improve the performance of radio admission control, the architecture of uplink access control based QoS guarantee is promoted to adapt the unique characteristics of services in WCDMA systems. It assigns the policy based on the classification of services and the QoS level, and then a new algorithm for access named Priority Code based DiffServ （PCD） algorithm is proposed. The signal flow of real/non-real time services is designed, and the new algorithm is simulated and contrasted with the foregone admission control algorithm. It is indicated that the proposed algorithm can solve the problem of uplink access control effectively, and it exhibits better operation throughput as well as time-delay performance compared with random access method, which improve the real-time service.