GPRS/UMTS无线数据接入的控制与优化

Performance Optimization of Internet Access in GPRS/UMTS Networks

提出了一种新的基于代理的协议框架以提高在GPRS/UMTS网络中进行无线数据接入的性能。在此框架下研究了延时阻塞调度策略。该策略利用数据业务对延时不敏感的特性,在不增加带宽的前提下显著改善系统的响应性能,为实现该策略下的无线信道资源管理,设计了最优信道分配和自适应信道分配两种算法。理论分析和仿真表明,新的机制和算法可以显著地提高网络利用率并缩短系统的平均响应时间。

A proxy-based framework for Internet access through GPRS/UMTS networks is proposed. A/low-level scheduling scheme called Delay Block （DB） is studied within this framework. By exploiting the relative delay tolerance of data service, DB scheme can reduce average response time of users without any additional bandwidth. Two algorithms, the optimal channel allocation algorithm and the adaptive channel allocation algorithm, are developed to managing the wireless resource. Analysis results and simulations show that the new framework and algorithms improve the average response time greatly while keeping network working efficiently.