A Study On Data Transmission Methods In Opportunistic Networks Based On Game Theory

The opportunistic network is a kind of mobile wireless ad hoc network.The transmission of data messages in this network does not depend on fixed routing path or relay node,it is achieved through the encounter opportunity created by the movement of the device node.This technical characteristic has determined its application fields include vehicle self-organizing communication,deep space communication and wildlife monitoring.Firstly,the research background and status quo of the data transmission methods in opportunistic network are introduced briefly in this thesis,and then the impact of the existence of selfish nodes on the performance in opportunistic network is analyzed.Next the effectiveness of game theory in dealing with the selfish behavior of the nodes in the network is introduced,what’s more,some representative data transmission methods are introduced and their shortages are explored.Secondly,Aiming at the problem of large overhead caused by the overmuch of node interaction process,overhead caused by delivering useless summary vector list,and the delay caused by the low probability of transaction success strategy between the nodes,a low overhead data transmission method in opportunity network-LODMON is put forwarded.The LODMON method adopts new mechanisms such as self-adaptive streamlining data packet summarization,self-adaptive control message merging,and the comprehensive consideration of trading profit strategy,which reduces the redundant signaling overhead in the network,and improves the packet forwarding rate,arrival rate,and network throughput.Thirdly,to address problem of the declining in message success rate caused by the transaction clearing center in the existing GSCP mechanism,the low efficiency incentive form of virtual currency strategy,a high success rate data transmission method based on game theory and selfish node detection in opportunistic network(HDGSON)is proposed,which improve the selfishness detection accuracy.At the same time,the information of detected selfish nodes is conveyed to other nodes by means of carrying,which reduced the broadcast overhead.Finally,the full text is summarized,and the future development prospect of the opportunistic network is analyzed,and at the same time the future research direction is given.