Ad Hoc网络中一种基于QoS约束的DSR协议

A Modified Approach to DSR with Qos-aware in Ad Hoc Networks

在Ad Hoc网络中QoS是一个重要问题,QoS路由技术是解决这一问题的关键技术之一。DSR协议是中小Ad Hoc网络中常用的被动式路由,但是DSR并不是以QoS为设计目标,在提供QoS方面有许多不足。该文提出一种满足QoS约束的DSR协议,引入带宽、延迟等多个QoS参数,并充分利用路由请求过程中发现的多条路径,针对具体链路状况选择单路径传输还是多路径分裂传输。仿真实验结果显示,对于在重负载以及网络拓扑变化频繁的情况下,改进后的DSR协议相比原DSR协议,在丢包率、网络吞吐量方面表现较好。

Qos is a very important problem in wireless Ad Hoc networks,and Qos routing is an important solution to this problem.Dynamic Source Protocol(DSR) is a famous on-demand protocol,but it is not designed to provide Qos guarantee.In this paper,DSR is modified in order to provide Qos support.To achieve this goal,it adds some Qos parameters such as bandwidth and delay.The strategies of single-path and multipath are brought into the protocol,and the modified protocol chooses the path which meets the Qos's requirements by taking the advantage of single-path routing and multipath-split routing.Our simulation results showed that the packet loss rate and the throughput of the improved DSR were better than the original DSR under the circumstances of heavy load and frequently changed topologies.