基于相遇紧密程度估测的延迟容忍网络路由

针对延迟容忍网络中节点运动状态变化频繁、通信路径不完整,使得转发消息仅能通过节点相遇而获得连接机会来完成,以及在不知节点间相关性的延迟容忍网络中盲目转发消息易导致其转发成功率较低等问题,提出了基于相遇紧密程度动态估测的延迟容忍网络路由策略.通过设计节点间的条件相遇时间间隔和连接持续时间的计算模型,来确定节点间关系的紧密程度;定义延迟容忍网络模型,构造最短路径择取机制,动态地选出条件最短路径,对消息进行转发.仿真数据对比显示,所提策略可有效改善网络性能,提高消息成功投递率,降低传输时延和负载率.

Abstract

As frequent changes of node movement and incomplete communication paths in delay tolerant networks cause messages to be forwarded only by chance of node meeting and blind message forwarding in such networks is liable to be low in success rate without knowing the node correlation,this paper proposes a meeting closeness-based dynamic estimation strategy for delay-tolerant networks. On the basis of designing a calculation model of the inter-node conditional meeting time interval and the connection duration,it determines the closeness of the inter-node relationship,defines the delay tolerant network model,constructs the shortest path selection mechanism,dynamically selects the conditional shortest path and forwards the messages. Simulation data comparisons indicate that the proposed strategy can effectively improve the network performances,increase the message delivery success rate and lower the transmission delay and load ratio.

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杨浏, 许毅. 基于相遇紧密程度估测的延迟容忍网络路由[J]. 光通信研究, 2015, 41(3): 71. Yang Liu, Xu Yi. Meeting closeness estimation-based delay tolerant network routing[J]. Study On Optical Communications, 2015, 41(3): 71.

基于相遇紧密程度估测的延迟容忍网络路由

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