Random network coding based The effective wireless MAC protocol

In wireless networks, network coding has been considered as an effective approach that utilizes the broadcast nature of the wireless channel to achieve energy efficiency and improve the network throughput. While network coding can be utilized in different forms of communications, including unicast, multicast and broadcast, the MAC layer transmissions used for network coding are mainly multicast, therefore, such network coding based communications are substantially affected by the performance of the underlying MAC layer multicast. Based on introduction of CSMA/CA protocol, the paper laid emphasis on shortcoming of network coding algorithm affect survivability time of WSN. In this paper we propose random network coding algorithm to remedy this shortcoming. Network simulation results with OPNET shows that the improved protocol effectively improves network survivable cycle in case of fixed network size. The performance of network delay and throughput also improved to a certain extent.