一种适用于宽带无线城域网实时业务的分组调度算法

Packet Scheduling Algorithm for Real-Time Services in Broadband WMAN

对宽带无线城域网(WMAN)而言,分组调度算法是保证用户服务质量(QoS)、平衡用户间公平性的关键。在研究比例公平调度算法(PF)算法与修正的最大加权时延优先算法(M-LWDF)的基础上,一种新的适用于宽带无线城域网实时业务的分组调度算法被提出,此算法引入了新的衡量服务队列负载的信息,能够实时地更新状态参数,提高了系统性能。仿真结果表明,此算法在保证系统吞吐量的同时,比M-LWDF算法具有更好的时延特性和公平性。

Packet scheduling algorithm is the key technology to guarantee Quality of Service （QoS） and balance the fairness between users in broadband Wireless Metropolitan Area Network （WMAN）. Based on the research of Proportional Fairness （PF） algorithm and Modified Largest Weighted Delay First （M-LWDF） algorithm, a new packet scheduling algorithm for real-time services in broadband WMAN was proposed. The algorithm phases in new information to measure the load of service queues and updates the state parameters on time, which remarkably improves system performance Simulation results show that comparing with M-LWDF algorithm, the proposed algorithm obtains advantages in performances of queuing delay and fairness while guaranteeing system throughput.