机会网络中节点的自私性的影响评估及其应用

发布时间：2017-12-28 19:07

本文关键词：机会网络中节点的自私性的影响评估及其应用　出处：《内蒙古大学》2017年硕士论文　论文类型：学位论文

【摘要】：在机会网络中,现有的路由协议都是假设节点积极地参与消息的投递,但是在真实场景中节点可能采取不合作的方式,即表现出自私行为。节点的自私行为对消息的投递造成较大影响,使消息的投递率降低、传输延迟增加,导致网络性能降低。在机会网络中,评估自私节点对网络性能影响一直是一个研究热点。本文主要研究节点自私行为对机会网络性能的影响,给出了评估方案并且研究了如何应用该评估方案。虽然目前针对评估方案的研究很多,但是大部分己有的评估方案存在如下问题:考虑的场景比较单一,其得出的结论具有片面性;其给出性能影响的表示过于复杂;其提出的理论没有进一步的应用。解决这些问题可以帮助人们深入地了解自私节点对于网络性能的影响程度,从而采取相应的应对措施。为了解决这些问题,本文做了以下工作:(1)本文提出了基于消息分类的自私节点对机会网络性能影响的评估方案,并且探讨了在移动模型为随机路点移动模型下,网络中消息的平均传输延迟和消息投递率在是否存在消息生存时间(Time To Live,TTL)限制下受自私节点影响的程度如何;(2)以往关于激励研究工作并未将满足特定性能指标的参数设置考虑在内,往往会导致过度激励,本文利用评估方案,获得了特定性能保证下影响性能的参数值;(3)由于本文提出的理论分析模型在一些复杂场景下并不适用,通过仿真实验,本文引入了存在摆渡节点的场景分析,并研究发现在该场景下机会网络对于节点自私行为同时具备鲁棒性和脆弱性;本文通过仿真实验分析喷洒等待路由,单副本PRoPHET路由以及单副本传染病路由受节点自私行为的影响,发现了网络性能受节点的自私行为影响与其路由策略有关。上述分析可以为处理节点自私行为的策略制定提供帮助。
[Abstract]:In opportunistic networks, the existing routing protocols all assume that nodes actively participate in the delivery of messages, but in real scenes, nodes may take a non cooperative way, that is, behave selfishly. The selfish behavior of the node has a great influence on the delivery of the message, which reduces the delivery rate of the message and increases the transmission delay, resulting in the decrease of the network performance. In the opportunity network, it has been a research hotspot to evaluate the effect of selfish nodes on network performance. This paper mainly studies the influence of node selfishness on the performance of opportunity network, gives an evaluation scheme and studies how to apply the evaluation scheme. Although many studies for the evaluation scheme, but most existing evaluation scheme has the following problems: the scene is relatively simple, its conclusion is one-sided; the effect is too complicated to give performance; the theory of no further use. Solving these problems can help people to understand the extent of the influence of selfish nodes on network performance and take corresponding countermeasures. In order to solve these problems, this paper has done the following work: (1) this paper proposes a message classification effect on the performance of selfish nodes based on opportunistic network evaluation scheme, and discussed in the moving model for the random waypoint mobility model, the average transmission network message delay and message delivery rate in the presence of the message time to live (Time To Live, TTL) how selfish nodes limit the effect of the degree; (2) the previous research work on the incentive did not satisfy the parameter set specific performance index into account, often leads to excessive incentive evaluation scheme by using the obtained specific performance guarantee performance parameters under the influence value; (3) the theory this paper presents the analysis of the model is not suitable in some complex scenes, through the simulation experiment, this paper introduces the research on existing ferries of the scene, and now the scene of opportunistic network It has robustness and vulnerability to selfish behavior of nodes; through the simulation experiment of spray and wait routing, single copy routing and PRoPHET effect of single copy infectious route by the selfish behavior of nodes, the network performance is found by the selfish behavior of nodes and their effects on routing strategy. The above analysis can help to deal with the strategy formulation of the selfish behavior of the node.
【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.02

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