A Reliable Transmission Protocol Based on Dynamic Link Cache

It comes out to be the first problem needs to be resolved for wireless sensor networks, that is, to make data acquisition at a lower energy consumption but with high reliability on transmission. So, a reliable transmission protocol with dynamic adjustment for caching position is presented in this paper, which makes a good compromise between transmission reliability and energy consumption. This protocol caches data packet based on the intermediate nodes, so the link nodes can be divided into near-source nodes and near-sink nodes according to the communications distance. The node section for cache packet is dynamically adjusted in accordance with the link quality. To make more a uniform distribution of cache, the packets are normally distributed to cache at their corresponding section. Simulation and energy consumption model based on Markov Analysis show that the protocol can improve the transmission reliability with an effectively reduced energy consumption compared to similar protocols.