摘要
结合无线Ad hoc网络与多媒体业务的特点,提出了一种新的适用于在无线Ad hoc网络中传输多媒体业务的多路径路由及每条路径上的流量分配算法.针对多路径路由,优先选择延时最短的路径,在此基础上选择多条路径来满足业务带宽的需求.流量分配算法中使用FEC编码对传输的业务流进行纠错,并给出了根据信道信噪比等特性计算FEC编码速率的算法,该算法能够较好地适应多媒体业务对实时性要求较高的特点,同时能够对无线链路达到最优的利用.仿真结果显示,所提算法能够很好地增加网络的利用率,有效地减小多路径的传输延时.
A multipath routing algorithm and a traffic distribution algorithm for the multi-media services in the wireless Ad hoc network were proposed, taking the characteristics of the wireless Ad hoc network and multi-media services into consideration. The routing algorithm chooses multiple routes with the priority of network delay, while traffic distribution algorithm utilizes FEC coding to ensure the correctness. An algorithm dynamically choosing FEC coding schemes based on the channel quality was also proposed. The algorithm can fulfill the requirement of multi-media QoS and can achieve more efficient utilization of wireless links. The simulation result demonstrates the correctness of our theory.
基金
国家自然科学基金重大项目(60496314)资助
