Research On Opportunistic Networks Routing Protocol Based On Sociality

Affected by node mobility,signal attenuation,energy depletion and other factors,mobile ad hoc networks are frequently interrupted,and the messages can not be transmitted through the end-to-end communication link from the source to the destination node.To deal with such problems,opportunistic networks are proposed as a new wireless network model,taking advantage of nodes' mobility.Messages are stored and forward in the relay nodes,completing data transmission in frequent interrupted network.The central problem in opportunistic network is successful message delivery in hash environment.Therefore,research of routing protocol is the key work in opportunistic network.This paper firstly analyses several existing routing protocol in the opportunistic network.For most mobile devices are carried by the human users,the mobility of nodes have a strong society.Combination with social characteristics between nodes can lead to better network performance.Social routing protocols are summarized based on these social relations.In ONE simulation platform,Bubble Rap and SimBet routing protocol are simulated,importing the movement model.Secondly,the effect of message copy restriction number and forward strategy are evaluated here,and reasonable message copy control strategy can improve the performance of the whole network.Through analysis of the node encounter frequency and encounter contact time of Cambridge dataset,this paper proposes a long contact time of encounter can accurately represent intimate social relationships between nodes,and delimits the higher the number of the long duration between the nodes,the more their familiar.Considering of opportunistic networks consisted of mobile devices have various social nature between nodes,this paper proposes a new opportunistic touting protocol,Prediction of Local Sociality Routing(PLSR).PLSR uses local social information to predict the forwarding capability in the relay node.PLSR considers the influence of node encounter frequency and encounter contact time on forwarding capability,and utilize the familiarity and centrality utility function for forwarding the message.This paper uses ONE simulation platform with Cambridge and MIT dataset for PLSR routing protocol simulation.Comparing with Epidemicrouting and Bubble Rap routing,PLSR has higher delivery rate and lower messaging forwarding costs.But it has higher average transmission delay.