Research On Home-based Message Forward Mechanism In Opportunistic Mobile Social Networks

Opportunistic Mobile Social Network(OMSN)is a special opportunistic network composed of mobile nodes with social characteristics.It not only has the characteristics of disconnection between nodes,limited resources and no guarantee of latency in communications,but also the movement between nodes has certain sociality and home feature.In view of these characteristics,the design of efficient routing protocols has become a hot research point in OMSN.Firstly,the related theories and key technologies of mobile social networks has been described in this thesis,and provides theoretical basis for the research of message forwarding mechanism in OMSN.On this basis,we focus on the locations visited by nodes frequently,which called homes and home-based routing.In OMSN,mobile nodes often visit few locations frequently,while visit other locations rarely.Based on the feature,a home-based opportunistic mobile social network model is proposed,and the cooperative and balanced message spreading process between home and node is analyzed as well.Further,a Cooperation-based Home and Node Spreading routing algorithm(CHNS)is proposed.The simulation results show that CHNS can obtain better performance.Further,we extend CHNS algorithm to the OMSN environment with multi-community.An OMSN model and the concept of community contact strength based on multi-community and multi-home are proposed accordingly.Based on the practical expected delay between communities,a Cooperation-based Home and Node Spreading with Multi-Community(CHNS_MC)routing algorithm is proposed.The simulation results show that the CHNS_MC algorithm can obtain better performance in delay and overhead(Hops).The research results provide idea in research on routing protocol and can be applied to the practical application in OMSN.Therefore,it has great theoretical value and application prospect.