社会感知多副本车载自组织网络机会路由协议

为提高车载自组织网络(vehicular Ad hoc networks, VANETs)中消息投递的效率, 提出了一种社会感知多副本车载自组织网络机会路由协议(SAMOR)。协议结合了车载自组织网络中节点的社会性特点和多副本路由方案的优势, 采用携带—存储—转发的机会路由方式进行消息投递。利用节点间的相遇历史区分社区节点和全局节点, 并使用所提出的节点社区中心性和网络中心性的度量方法, 得到了节点的效用。在路由过程的扩散阶段, 节点间按效用分配副本, 在转发阶段, 副本继续向效用高的节点转发。仿真结果表明, SAMOR实现了较高的消息投递成功率和较低的延迟。

Socially aware multiple-copy opportunistic routing protocol for VANETs

In order to deliver the messages more efficiently in VANETs, this paper proposed a protocol of socially aware multiple-copy opportunistic routing (SAMOR). Jointing the sociability of VANETs and the virtue of multiple-copy routing, the protocol adopted the opportunistic forwarding method of store-carry-forward to deliver messages. Based on the contact history of nodes, it distinguished the intra-community and inter-community of nodes, proposed metrics of intra-community centrality and inter-community centrality of nodes , and got the utilities of nodes. During the spraying phase of routing process, copies were distributed according to the utility of node, while in the forward phase, a copy would be forwarded to node with higher utility. Simulation results show that SAMOR outperforms other protocols in terms of delivery ratio and delay.