Ad Hoc网络基于信誉机制的自私节点检测方法研究

发布时间：2018-05-14 02:26

本文选题：Ad + Hoc网络　；参考：《青岛大学》2017年硕士论文

【摘要】：移动Ad Hoc网络是一种无中心、多跳、动态拓扑的自组织无线网络,因其无需固定基础设施支持、具有较强抗毁性、组网迅速等优点,主要被用于军事通信、紧急救援等领域。然而,由于Ad Hoc网络中节点移动性、传输介质脆弱性、无中心节点等因素,导致与传统网络相比更易受到攻击,尤其是网络内部节点存在自私行为,影响网络性能、甚至导致网络瘫痪。针对这种问题,本文通过研究Ad Hoc网络中自私节点的检测方法,提出了基于信誉机制的自私节点检测方法。首先,通过研究对比Ad Hoc网络中已有的自私节点检测方法,提出了基于数据驱动的信誉评估模型DDRE。该模型通过数据驱动的加权平均方法计算节点的本地信誉值;当本地信誉记录表中无法查询到节点信誉值时,采用信誉分享机制获取邻居节点的推荐信誉信息;根据网络中节点的通信情况及时更新信誉值。其次,在DDRE模型基础上,提出一种新的信誉机制检测网络中的自私节点。该机制由监控模块、信誉评估模块、惩罚模块及响应模块四部分组成。监控模块监视网络中节点的通信状况,信誉评估模块根据节点的通信状况进行信誉评估,惩罚模块根据惩罚规则对节点进行处理,响应模块收到信誉评估模块和惩罚模块的消息执行相应的动作。最后,使用NS2仿真软件针对有无信誉机制的Ad Hoc网络进行仿真实验及结果分析。仿真结果表明,采用信誉机制的Ad Hoc网络,能够在一定程度上抵制网络中节点的自私行为,可以有效提高数据包投递率、增加网络吞吐量、减少路由开销,进而提高了网络性能。
[Abstract]:Mobile Ad Hoc network is a kind of self-organized wireless network with no center, multi-hop and dynamic topology. It has the advantages of strong survivability, fast networking and so on, so it is mainly used in military communication, emergency rescue and other fields. However, due to the mobility of nodes in Ad Hoc networks, the fragility of transmission media and the absence of central nodes, it is more vulnerable to attack than traditional networks, especially the selfish behavior of nodes in Ad Hoc networks, which affects the network performance. Even lead to network paralysis. In order to solve this problem, this paper studies the detection method of selfishness nodes in Ad Hoc networks, and proposes a new method of selfishness node detection based on reputation mechanism. Firstly, by comparing the existing selfishness node detection methods in Ad Hoc networks, a data-driven reputation evaluation model is proposed. The model calculates the local reputation value of the node by data-driven weighted averaging method, and obtains the recommended reputation information of the neighbor node by reputation sharing mechanism when the local reputation record table can not query the node reputation value. Update the reputation value according to the communication status of the nodes in the network. Secondly, based on the DDRE model, a new reputation mechanism is proposed to detect the selfish nodes in the network. The mechanism consists of four parts: monitoring module, credit evaluation module, punishment module and response module. The monitoring module monitors the communication status of the nodes in the network, the reputation evaluation module evaluates the reputation of the nodes according to the communication status of the nodes, and the punishment module processes the nodes according to the punishment rules. The response module receives the messages from the reputation evaluation module and the punishment module to perform the corresponding actions. Finally, NS2 simulation software is used to analyze the simulation results of Ad Hoc networks with or without reputation mechanism. Simulation results show that Ad Hoc networks with reputation mechanism can resist the selfish behavior of nodes in the network to a certain extent, can effectively improve the packet delivery rate, increase network throughput, and reduce routing overhead. Furthermore, the network performance is improved.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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