Research on network coding based on LEACH for wireless sensor network

Proposing of network coding breaks the traditional routing mode which is only responsible for receiving and forwarding information [1]. The researches show that network coding can improve the network throughput, reduce node energy consumption, balance network load, reduce transmission delay, increase network fault tolerance and robustness, and improve information security [2]. This paper focuses on how to utilize network coding in wireless sensor networks and select typical wireless sensor networks routing protocol — LEACH protocol as the object of study. In order to decrease the number of transmissions used, traffic in opposite directions over two wireless hops can utilize the advantage of network coding. Based on this point, this paper creates network coding opportunities on the Sink node in the LEACH protocol model and improve LEACH protocol model — LEACH model based on network coding (NCLEACH model). Simulation shows that NCLEACH model has better performance. The network throughput and the Sink node residual energy are both improved.