WiMAX中的多业务接入性能分析

Accessing performance analysis of multi-traffic in WiMAX

针对IEEE802.16媒体接入机制,研究了WiMAX(微波存取全球互通)系统中多业务场景下的吞吐量、接入延时和丢包率性能,考察了帧结构、最小竞争窗和延时约束对不同优先级业务性能的影响。仿真结果表明,选择最优的帧结构并为有不同QoS(服务质量)需求的业务选择接入参数,能够增加系统吞吐量,减小业务接入延时和丢包率。

Aiming at the mechanism of medium access in IEEE 802.16 standard, the performance of WiMAX in a multi-traffic scenario is studied, including system throughput, access delay and packet dropping rate. The impact of frame structure, minimum contention window size and delay constraint on the performance is investigated for different prioritized applications. Simulation results show that, increased system throughput, reduced access delay and lower packet dropping rate can 1,e achieved by selecting the optimum frame structure and accessing parameters for applications with different quality of service （QoS） requirements.