一种带有降级机制的无线Mesh网络调度策略

摘要

针对IEEE802．16标准Mesh模式MAC层调度算法的不足，提出了一种带有降级机制的调度策略（Grading Scheduling Algorithm with Degradation，简称GSAD）。算法综合考虑IEEE802．16标准中规定的传输优先级、最小保留速率、最大保持速率和最大延迟四个QoS参数。通过降级的机制控制服务流的调度顺序和带宽分配大小，完成对数据的调度。实验结果表明，GSAD算法具有较高的时效性，并且能够有效保证不同多媒体业务的QoS。%For the deficiencies of existing scheduling algorithms,the paper proposes a coordinated dis- tributed scheduling algorithm with degradation-GSAD(Grading Scheduling Algorithm with Degrada-tion).The algorithm takes into account the IEEE 802.16 standard transmission priority,the minimum reten-tion rate,maximum retention rate and the maximum delay of the four QoS parameters.Simulation shows that the algorithm has high efficiency,and can ensure the QoS of different multimedia services.