基于介质独立切换的HWN分组调度算法

Heterogeneous Wireless Network Packet Scheduling Algorithm Based on Media Independent Handover

针对异构无线网络(Heterogeneous Wireless Network,HWN)中多种无线接入技术(Radio Access Technology,RAT)间业务分组调度问题,提出一种基于介质独立切换(Media Independent Handover,MIH)的新型动态混合业务分组调度算法,用于长期演进技术(Long Term Evolution,LTE)蜂窝网、无线局域网(Wireless Local Area Network,WLAN)和无线mesh网络(WMN)之间的互联。利用MIH功能模块获得链路状态信息,并结合呼叫类型、业务类型和延迟约束来调度业务。其中,为具有最低剩余时间和最优信道质量的业务分配最高的优先级,从而确保延迟约束,并最大化资源利用率。仿真结果表明,该算法具有较低的分组丢包率、呼叫阻塞率和平均等待时间。

For the issues that the packet scheduling between a variety of radio access technologies（RAT） in heterogeneous wireless networks（HWN）, a new dynamic hybrid traffic packet scheduling algorithm based on media independent handover（MIH） is proposed, which is used for the interconnection between LTE, wireless LAN（WLAN） and wireless mesh network（WMN）. The MIH function is used to obtain the link state information, and combine with the call type, traffic type and delay constraints to schedule the job. The job with the least remaining time and best channel quality is assigned the highest priority, to ensure the delay bound, and maximize the resource utilization. Simulation results show that the proposed algorithm has low packet loss rate, call blocking probability and average waiting time.