无线Ad hoc网络路由协议比较

无线Ad hoe网络是一种新型的移动计算网络,本文首先介绍了Ad hoe网络的特点以及路由协议分类,然后针对四种典型的路由协议通过NS2仿真器进行了仿真分析和性能比较,并得出了结论。     

按需路由协议AODV的安全性改进与仿真

移动Ad hoc网络无基础设施仅靠网络节点之间的协作完成通信。其路由协议的安全性是研究热点之一。通过对按需路由协议AODV及其安全性进行分析,提出一种基于其安全性的改进方案。该方案采用隐藏身份寻找路由、唯一标识路由请求,对报文分组进行认证等方法,增强路由信息安全性。最后在NS2网络仿真平台上对该方案进行仿真和性能分析,结果表明改进方案的安全性有较大提高。     

移动Ad Hoc网络的安全路由协议研究

ad hoc网络是一种新型的无线移动网络,因其独特的组网特性,使得安全问题成为其发展的最大束缚。路由协议的安全是自组网安全的一个重要部分。本文首先论述移动AdHoc网络中的安全问题,介绍了多种安全路由的协议和方案,并对其中的三种按需安全路由协议进行了比较,最后提出进一步研究AdHoc网络路由安全应注意的问题。     

因特网路由协议安全性研究

路由协议安全是因特网安全的重要组成部分。为了提高路由协议运行的安全性，保障网络的良好运行，路由协议都采用了一定的安全增强手段。本文对当今互联网中使用的路由协议的安全性进行了分析与研究，指出了各路由协议中存在的安全隐患，并给出了相应的改进意见。     

移动Ad hoc网络路由协议FSR研究

随着无线通信技术的发展和移动终端性能的提高,Ad hoc的应用越来越广泛。无线Ad hoe是一种不依赖于任何基础设施,无中心自组织的多跳无线网络。本文从Ad hoc网络的特点出发,在分析当前路由协议设计思想的基础上,对Ad hoc的路由协议FSR进行了研究。     

无线Ad hoc网与Internet的互连

通过移动IP和AODV协议合作，无线Adhoc网内的移动节点可以与外地代理之间进行多跳通信，从而实现无线Ad hoc网与Internet的互连。本文首先分析了AODV协议，然后对无线Ad hoe网络与Internet互连的技术方案，包括数据结构、代理广播消息、外地代理搜索、注册、路由发现与数据传输、切换与负载平衡问题等进行了详细讨论。     

基于二进前向神经网络的Ad Hoc网络节点识别方法

提出了一种基于二进前向神经网络的无线移动Ad Hoc网络节点识别方法。安全问题是无线移动Ad Hoc网络的一个关键性问题，路由协议的安全尤为重要，本文针对恶意节点的主动攻击提出了一种基于二进前向神经网络的无线移动Ad Hoc网络节点识别方法，该方法可以有效的避免恶意节点接入网络，从而提高了网络路由的安全性。     

一种改进型Ad hoc网络安全路由协议

移动Adhoc网络的自组织、动态拓扑以及无线接入等特点使路由的安全性问题日益突出,而现有的Adhoc网络路由协议并没有提供安全的保护机制。论文首先论述了Adhoc网络几种常见的按需安全路由协议,指出有待解决的问题,在此基础上提出一种改进的、有效的安全路由协议（SEAR）,阐述了该协议的路由请求、响应和维护的路由方式和过程,并通过协议间的比较分析其安全性和网络性能。该方案采用对称密钥协商和公钥认证方式,在兼顾性能资源的同时也保证了Adhoc网络的路由安全。     

Ad hoc安全路由协议SRP的分析与研究

移动Ad hoc网络具有组网灵活方便,投资较少的特点,但是由于其安全性,尤其是路由安全问题致使未能够广泛应用.本文首先介绍了Ad hoc网络的特点,分析了其存在的安全问题,重点介绍了SRP安全路由协议的设计思路,并通过分析提出了路由安全协议应具有的特性.     

一种高效的按需路由协议安全性改进方法

研究了移动AdHoc网络(MANET)按需路由协议的安全问题,分析了现有的安全改进方案的优缺点.以一种基于椭圆曲线密码体制的高效数字签名算法为基础,提出一种适合按需路由协议的安全性改进方法,对其执行效率和安全性进行了分析,并在QualNet仿真平台下对应用该方法改进的AODV协议进行验证.仿真过程实现了真实的安全算法,针对blackholes和rushing两种常见攻击分别构建了攻击模型,结果表明改进后协议以很小的延时和协议开销代价得到了较高的安全性.     

A secure and trust based on-demand multipath routing scheme for self-organized mobile ad-hoc networks

A mobile ad hoc network (MANET) is a self-configurable network connected by wireless links. This type of network is only suitable for provisional communication links as it is infrastructure-less and there is no centralized control. Providing QoS and security aware routing is a challenging task in this type of network due to dynamic topology and limited resources. The main purpose of secure and trust based on-demand multipath routing is to find trust based secure route from source to destination which will satisfy two or more end to end QoS constraints. In this paper, the standard ad hoc on-demand multi-path distance vector protocol is extended as the base routing protocol to evaluate this model. The proposed mesh based multipath routing scheme to discover all possible secure paths using secure adjacent position trust verification protocol and better link optimal path find by the Dolphin Echolocation Algorithm for efficient communication in MANET. The performance analysis and numerical results show that our proposed routing protocol produces better packet delivery ratio, reduced packet delay, reduced overheads and provide security against vulnerabilities and attacks.     

基于MANET网络的服务协议

为了实现MANET网络的服务协议,提出了一种基于OLSR路由协议的MANET网络服务发布发现协议的设计方案,分析了OLSR路由协议的特点,根据MPR节点算法的特殊性,将服务消息通过MPR节点转发,通过主动模式和被动模式获取服务消息,实现服务发现.并设计了在OLSR路由协议下的服务协议机制.     

基于稳定闭域的异构无线网络混合路由策略

分析了异构的网络模型,并提出了一种基于MANET稳定闭域的混合路由策略,使得基于该路由策略设计的路由协议能够实时地根据本地拓扑状态进行转换,在稳定闭域内使用AODV提高路由转发的效率。当数据分组转发到闭域边界后,将转换为改进的Prophet路由继续在非连通区域内寻路,以充分利用MANET与DTN路由的优势。仿真实验证明了该路由策略的可行性,通过比较多种路由算法验证了在特定的异构网络环境下该路由策略的高效性。     

Trust-Based Routing Mechanism in MANET: Design and Implementation

Mobile Ad hoc Network (MANET) is a self-organizing wireless network for mobile devices. It does not require any fixed infrastructure to be configured which makes it more suitable to be used in environments that require on-the-fly setup. This paper discusses the challenging issues in MANET routing security. It presents FrAODV, a trust-based scheme for securing AODV routing protocol in MANET using the friendship mechanism. The nodes can evaluate the routing paths according to some selected features (such as node reputation and identity information) before forwarding the data through these routes. We have used two types of implementation in our scheme, simulation (using NS2) and real test-bed (using JADHOC). This scheme is believed to provide a robust environment where MANET nodes can trust each other in a secure community.     

Gateway Selection Protocol in Hybrid MANET Using DYMO Routing

In this paper, we propose a novel gateway (GW) selection protocol in hybrid Mobile Ad hoc Networks (MANETs). We focus on the situation that occurs when specialized, sensitive data is sent to the Internet from MANET nodes. These special data types are especially susceptible to security risks such as information leak and data falsification. Therefore, it is necessary for such special data to be forwarded by a secure/trusted GW which is controlled by a trusted network administrator. However, there should be multiple GWs deployed in a MANET, where the cost ineffectiveness makes it difficult for a network administrator to simultaneously manage every GW. Because of the risk of forwarding special data through an unmaintained GW, we propose a routing protocol which allows a source node to have sensitive data forwarded to the Internet through a trusted GW. To achieve this desirable performance, we improve upon one of the newest routing protocols, Dynamic MANET On-demand (DYMO), which works in consideration of application data. Through simulations, we evaluate our protocol in comparison with the conventional DYMO protocol. The results show that our protocol can make MANET source nodes choose GWs for specific data.     

DEBH: detecting and eliminating black holes in mobile ad hoc network

Security in mobile ad hoc network (MANET) is one of the key challenges due to its special features e.g. hop-by-hop communications, dynamic topology, and open network boundary that received tremendous attention by scholars. Traditional security methods are not applicable in MANET due to its special properties. In this paper, a novel approach called detecting and eliminating black holes (DEBH) is proposed that uses a data control packet and an additional black hole check table for detecting and eliminating malicious nodes. Benefiting from trustable nodes, the processing overhead of the security method decreases by passing time. Ad hoc on-demand distance vector (AODV) routing protocol is used as the routing protocol in our design. After finding the freshest path using AODV, our design checks the safety of selected path. In case of detecting any malicious node, it is isolated from the entire network by broadcasting a packet that contains the ID of malicious nodes. Simulation results show that DEBH increases network throughput and decreases packet overhead and delay in comparison with other studied approaches. Moreover, DEBH is able to detect all active malicious nodes which generates fault routing information.     

LEO/MEO卫星网络中运用自组网思想的动态路由算法

分析了基于星际链路的LEO/MEO路由算法的特点及卫星网与自组网的相同之处，借鉴了自组网路由协议中适用于卫星网的部分，提出了LEO/MEO卫星网络中运用自组网思想的动态路由算法，并对算法进行了模型仿真和性能分析，这种算法增强了卫星网络的自适应性，使网络具有自治性强，功能更全面、系统开销小、适用范围广等特点。     

MANET中常见的路由安全威胁及相应解决方案

针对MANET路由安全的重要性及其脆弱性,从不同角度对MANET的路由层或其它相应层面造成的安全攻击,分类综合出目前网络面临的六大类型的路由安全威胁,即黑洞问题、拒绝服务(DoS)、路由表溢出、伪装欺骗、能源耗竭及信息泄漏。阐述了各个问题的产生过程及其引起的安全威胁,通过分析比较目前已有的相关解决方案,以实际性能为标准得出各个问题的最佳解决方案。     

基于OPNET仿真平台的AODV协议的性能研究

AODV(Ad hoc On-demand Distance Vector Routing)路由协议是面向移动Adhoc网络的,在介绍了移动Ad hoc网络的特征、现有路由协议和AODV路由协议的发展过程之后,重点分析了AODV协议的特征、路由建立、维护过程,并基于OPNET平台仿真了AODV协议的性能(包括路由发现时间、协议效率、平均跳数、数据吞吐量),总结了目前AODV协议存在的问题及其改进的主要方法,最后对AODV协议改进的前景进行了预测。     

Routing security in wireless ad hoc networks

A mobile ad hoc network consists of a collection of wireless mobile nodes that are capable of communicating with each other without the use of a network infrastructure or any centralized administration. MANET is an emerging research area with practical applications. However, wireless MANET is particularly vulnerable due to its fundamental characteristics, such as open medium, dynamic topology, distributed cooperation, and constrained capability. Routing plays an important role in the security of the entire network. In general, routing security in wireless MANETs appears to be a problem that is not trivial to solve. In this article we study the routing security issues of MANETs, and analyze in detail one type of attack-the "black hole" problem-that can easily be employed against the MANETs. We also propose a solution for the black hole problem for ad hoc on-demand distance vector routing protocol.