Research On Transmission Technology By Sociality In DTN Based On Network Coding

With the rapid development of information technology,the wireless network transmission technology gets a great development.From the traditional wireless network routing protocol to the mobile ad hoc network routing protocol,delay tolerant network routing protocol,the related research of routing protocol becomes more mature.Due to its long delay and intermittent connection,the delay tolerant network provides a new direction for the research of wireless network transmission.Delay tolerant network is a new network architecture that lacks continuous connection.Choosing the right forwarding node is the key to achieve efficient forwarding and message delivery in delay tolerant network.The mobility of nodes and the dynamic change of network topology affect the transmission efficiency of delay tolerant network.Previous routing protocols applied to traditional wireless networks are no longer applicable to it.From the initial replica routing protocol and context routing protocol,the research of routing technology based on replica protocol is more and more perfect.researchers turn to the study of the impact of node relationships and node mobility on routing protocols.Based on the social characteristics of nodes,this paper proposes the NS-DTN network model.The NS-DTN network model mainly consists of three parts,the division of communities,the degree of intimacy and the degree of node activity.In the division of the community,this paper proposes the improved LORadicchi algorithm because the Radicchi algorithm can't take effect on the overlapping structure in the network.The NS-DTN network model selects the most suitable forwarding node and path according to the community division,the community tightness and the node activity.The simulation results show that the NS-DTN network model can effectively improve the success rate of information delivery and reduce the delays in data transmission.On this basis,we introduce the network coding for improving the network throughput,and propose the NSNC-DTN network model.The NSNC-DTN network model adopts a random linear network coding scheme,which combines source node coding with Center node coding to alleviate the pressure of source node coding,improve the effect of random coding,and reduce redundant data in network.The simulation results show that the improved network model can effectively improve the network throughput.Consequently,this research for the further development of delay tolerant network has positive significance.