摘要
为了提高机会网络的传输效率,该文在分析现有'存储-携带-转发'传输模型的的基础上,提出一种基于转交效用的多副本传输方法。该方法根据节点历史相遇的时间和空间信息计算节点的递交概率预测值,并将其应用到散发策略和转发递交策略中,使节点在选择下一跳节点时能够预先判断其到达目的节点的效率,从而选择一条最优路径,提高了副本投递的能力。仿真结果表明,该路由算法具有较高的报文成功递交率、较低的平均网络延时,以及较低的网络开销,适合于通信不稳定的机会网络。
In order to improve the transmission efficiency of the opportunistic network, this paper proposes a novel transitivity-based multiple-copy transmission scheme by analyzing the existed store- carry-forward transmission schemes. The scheme calculates the delivery probability according to the historical temporal and spatial information of a node, and applies it to a novel spray and transfer strategy. The node smartly chooses the next hop and builds up an optimal path to the destination, en- hancing the transmission efficiency. Simulation experiments show that the proposed routing protocol performs efficiently in terms of the delivery rate, the average delay and the communication overhead, suiting for the unstable opportunistic networks.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2012年第4期573-578,共6页
Journal of Nanjing University of Science and Technology
基金
国家自然科学基金(61172087)
关键词
机会网络
路由协议
转交效用
多副本
opportunistic networks
routing protocol
transitivity
multiple-copy