安全保障：无线Mesh网络中支持QoS的DSR路由协议的改进与实现

随着无线Mesh网络传输多媒体业务需求的增加，要求网络支持服务质量（QoS），本文基于DSR协议设计了一个支持QoS的路由协议算法QDSR（QoS-DSR）。该算法保证了数据流的带宽、时延的QoS需求，根据路径跳数和节点拥塞情况定义路由代价函数，选择最优路径。仿真结果表明，与DSR相比，QDSR提高了网络吞吐量，降低了平均端到端延时，提高了网络利用率，更好地满足业务的QoS需求，并且具有更强的适用性和可扩展性。

Improvement and Realization of DSR Routing Protocol with QoS Support in Wireless Mesh Networks

In Wireless Mesh Network,multimedia applications require the network to guarantee Quality-of- Service(QoS). A new QoS-aware routing protocol based on DSR named QDSR(QoS-DSR) is further proposed. QDSR guarantees the QoS of application, such as bandwidth and delay, defines routing cost function according to the number of hops of path and buffer and chooses the best path based on routing cost. Simulation results show that, compared with DSR, QDSR greatly improves the throughput, reduces the average end to end delay, improves the efficiency, satisfies the QoS of application better and has stronger applicability and expansibility.