A Delay Guarantee QoS Routing Protocol
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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.