一种时延保证的QoS路由协议

针对无线传感器网络中多跳视频传输实时性难以保证以及节点失效造成的传输中断问题,本文在比较分析了考虑时延的路由协议基础上,提出并设计了一种保证时延QoS要求可自我修复的路由协议(Self Repaired and Delay Guarantee Routing Protocol)。该协议选择时延最短的节点作为路由节点,缩短了多跳传输时间;在路由表中增加备选路由节点,当某个路由节点失效时,自动启用备选节点修复路由,节省了路由重新建立的时间,保证了视频传输持续性。仿真结果表明该路由协议能够较好地满足无线传感器网络中多跳视频传输的时延要求。

A Delay Guarantee QoS Routing Protocol

It is difficult to meet the demands for real-time multi-hop video transmission in wireless sensor network, and solve the problem of transmission interruption due to invalid route node. In this paper, we consider some routing protocols based on delay, and propose a Self Repaired and Delay Guarantee routing protocol (SRDG), which can provide QoS support to meet the delay requirement and repair route path automatically when a route node fails to work. It reduces the time of multi-hop video transmission by selecting shortest-delay node as route node. It also avoids reestablishing route path via automatically replacing invalid node with alternative one stored in node ’s routing table, which saves time and ensures continuous video transmission. The routing protocol can satisfactorily meet the delay requirement of multi-hop video transmission in wireless sensor network.