The Research Of Multipath Routing Protocol Based On Network Coding In Wireless Sensor Network

The application field of wireless sensor network(WSN) is very widely, and the prospect and theresearch significance is enormous. As an emerging technology, network coding is suitable forwireless network, and can improve the reliability and throughput in the network. So the research ofwireless sensor network based on network coding has become a focus in the research. Routingprotocol is the foundation of the wireless sensor network. Due to the limitation of the wireless linkquality and node energy, the performance of reliability and energy should be considered in routingprotocol of WSN. But the improvement of reliability will inevitably lead to energy costs.Multipath transmission is one of the most common reliable transmission modes, so we firstbuild node disjoint multipath rouing and braided multipath routing based on network coding. Wecompare two performance indicators: successful delivery rate(SDR) and normalizedredundancy(NR),these two indicators also reflects the reliability and the energy consumption of themodel. And we get the optimal model through the simulation. Then we divide the network intovirtual grids to design a new routing protocol BRGNC based on the optimal model. The protocolensure high reliability and balance of the energy consumption among nodes.At last we simulate thisrouting protocol with other routing protocols, the simulation results show that the BRGNC protocolcan greatly reduce the overall network energy consumption and improve reliability. The protocol’sperformance can be greatly improved by increase the network density if the protocol is applied to alarge-scale network with low link quality，such as forest and underwater area.