基于社会特征能量感知的容迟网组播协议

Social characteristics energy-aware based multicast in delay tolerant network

由于容迟网DTN(Delay-Tolerant Network)节点间连接的间歇性,节点只能依据机会性相遇转发数据。为此,提出基于社会特征的能量感知的容迟网络的组播SCEAM(Social Characteristics Energy-Aware based Multicast)协议。将社会网络思想引入DTN的路由协议,进而选择合适的转发节点传输数据,这充分利用了节点的长期和较稳定的社会特征知识进行决策转发数据。SCEAM协议就利用节点最重要的社会特征——中心度,并考虑节点能量两项信息选择转发节点。仿真数据表明,提出的SCEAM协议在满足数据传输率的要求下,能够支持更多的组播业务,与SDM协议相比,组播业务提高了近27%。

In delay-tolerant networks （DTN） , nodes forward data opportunistically upon contact because of irregular connectivity and low network-denseness. Therefore, social characteristics energy-aware based Multicast （SCEAM）in delay tolerant network is proposed in this paper. Using concepts of social networks in the design of DTN routing schemes, SCEAM protocol selects appropriate relay nodes for data forwarding. This is because of its ability to make forwarding decisions based on the knowledge of long-term and more stable social characteristics of the nodes. The proposed scheme selects relays for delivering data to the destinations based on the centrality, one of the important social network characteristics, as well as on the residual energy of the DTN nodes. Simulation results show that our scheme supports higher number of multicast sessions while achieving required data delivery ratio. Compared with SDM, number of multicast sessions of SCEAM is improved by 27%.