A Social Opportunistic Network Communication Protocol Based On Energy Efficiency

With the development and wide application of V2 V technology and intelligent transportation network technology,users carrying wireless mobile communication devices(such as Bluetooth,Wi-Fi,etc.)can communicate conveniently through these electronic devices.This also makes it possible to communicate in an environment lacking or even without infrastructure.On this basis,a new type of wireless mobile ad hoc network—Opportunistic Networks(ONs)has been developed.Compared with TCP/IP networks with complete communication links,opportunistic networks are characterized by intermittent links,high-speed dynamic topology changes,high node mobility and limited network resources.This kind of network has broad applications in earthquake/fire rescue,vehicular Ad-hoc networks,remote area communication and other special environments.Opportunity Networks focus on how to improve the delivery ratio of messages while maintaining low network cost under the condition of sparse node density.Nodes in ONs are constantly moving,and their location is uncertain.In addition,the energy,cache and processing capacity of nodes are limited,which leads to frequent disconnection of communication links.Therefore,the traditional end-to-end TCP/IP network has been unable to adapt to this complex and changeable network environment.According to the elements of constructing opportunistic network routing protocol and the research and analysis of classical routing algorithm,this paper designs a Social Probability and Resource Effective Router(SPARE)protocol based on energy utility protocol.SPARE protocol is based on the similarity utility of node encounter probability,separation time interval,weight connection and resource consumption.It can save network resources as much as possible and improve message delivery rate.According to the smooth encounter probability of relay nodes and destination nodes,SPARE adopts two different strategies,i.e.resource society probability similarity utility forwarding strategy and connection waiting similarity utility transmission strategy,to decide the forwarding mode of messages.The resource society probability similarity utility forwarding strategy mainly considers the frequent encounters between relay nodes and destination nodes.Source nodes transmit messages to nodes with shorter separation intervals and higher encounter frequency and higher resource utilization.Connection waiting for similar utility transmission strategy mainly considers the situation that relay node and destination node may meet less to improve message delivery ratio.In this case,the source node selects a node that encounters a shorter time with the destination node and a node with more historical average public neighbor nodes to forward the message.At the same time,in order to reduce network cost,SPARE dynamically updates the number of message copies according to the resource consumption and message delivery capability of nodes.Finally,under the Opportunistic Network Environment Simulator(ONE)platform,SPARE protocol is simulated and compared with EBR,EBRR,SimBet and EA-Prophet.In this paper,the opportunistic network protocols is simulated and compared by using three evaluation indicators: message transmission delivery ratio,network cost and average delivery latency.The simulation results show that under the same experimental conditions,the delivery ratio of SPARE protocol is significantly higher than that of the other four routing protocols.The protocol has higher stability and lower network cost,which achieves the goal of balancing delivery ratio and network cost.