移动自组网中节能路由策略的分析与比较

移动自组网是由一组带有无线收发装置的移动节点组成的一个支持多跳的临时性的网络自治系统。由于移动自组网的大多数节点是由有限寿命的电池来提供的，因此能量保护策略成为制定路由协议的一个重要依据。通过对现有移动自组网的节能路由策略的分析和比较，提供了未来的研究方向。     

一种能量感知的无线移动自组网路由协议

无线移动自组网中的大多数节点都是由有限寿命的电池来提供的,能量保护策略就成为设计网络协议的一个重要条件。提出一种能量感知的无线移动自组网路由协议,综合考虑了节点的剩余能量和路由跳数,有效保护网络中能量低的节点,减少了节点能量损耗,延长了网络的使用时间。该路由协议中采用了局部路由修复机制,减少了数据包丢失,提高了数据传输率。最后,仿真结果证明了协议的有效性。     

自组网环境下具有能量和移动感知的自适应路由协议

自组网是由一组带有无线收发装置的移动节点组成的一个能够支持多跳的临时性的通信网络，动态拓扑变化是它的最大特征之一；此外，由于自组网的大多数节点是由有限寿命的电池来提供的，能量保护策略成为设计该类网络协议的一个重要依据。文章提出了一种基于动态源路由的具有能量和移动感知的自适应路由协议，仿真表明该协议有效地延长了网络的生存时间，并提高了网络吞吐量。     

自组网环境下基于模糊控制的自适应动态源路由协议

自组网是由一组带有无线收发装置的移动节点组成的一个能够支持多跳的临时性的计算机通信网络，大多数节点是由有限寿命的电池来提供的，因此能量保护策略成为设计该类网络路由协议的一个重要依据．同时，拓扑的动态变化是该类网络的另一主要特征，它将影响路由的稳定性．通过对节点当前剩余电池能量和邻居节点之间链路稳定性的观察，并使用模糊逻辑控制策略，文中提出了一种基于动态源路由的自适应路由协议，仿真表明该协议有效地延长了网络的生存时间，并提高了报文提交率．     

基于分簇结构的无线移动网络多播路由协议

移动自组网（MANET，Mobile Ad hoc Networks）是一种特殊的、应用前景广阔的新型移动无线网络。特有的网络特性使它在诸如灾难救助、战场、传感器网络、分布式计算等领域有着广泛的应用前景。结合在移动自组网络中应用最为广泛的分层结构——簇结构的特点，提出了一种基于簇结构的移动自组网多播波路由协议。协议通过对移动自组网进行簇划分，形成由簇头、簇间节点和簇内节点构成的分簇网络结构，并且在由簇头和簇间节点形成的虚拟骨干网基础上，对其进行回路检测和冗余剪枝算法处理，最终得到一个能满足多播要求的多播树，从而实现在移动自组网中的多播路由。通过对仿真实验结果的分析，该协议具有稳定的数据包发送率和较低的路由建立时间。     

移动自组网的安全路由协议

移动自组网（MANET）是自治的无基础设施的网络,它通过IP路由支持多跳无线通信,它被用于没有基础设施存在的动态变化的场景。多数自组网路由协议利用节点之间固有特性即相邻节点的信赖关系进行协作转发数据包。这种信赖模型使得恶意节点利用插入错误的路由更新、重放过时的路由信息、改变路由更新、或广播不正确的路由信息来瘫痪自组网。针对自组网的缺陷提出了一种认证路由策略来解决这些问题,同时也列举了仿真实验结果。     

移动自组网络中一种有效的选播路由协议

移动自组网是一种特殊的无线移动通信网络，它由一系列带有无线收发装置的动态节点临时形成一个多跳的自治系统，因此传统网络中的路由协议不适合于移动自组网络．选播作为一类新的通信协议，能有效平衡网络负载分布和提高网络性能．本文首先描述了移动自组网络的特点及该环境下的路由协议，在此基础上提出了一种有效的选播路由协议．通过平均分组传送成功概率和平均控制字节数指标的测试表明了算法的有效性．     

基于节点度的移动自组网络Grover路由算法研究

移动自组网络是当前无线网络研究的热点问题,网络路由算法研究是其中的一个关键问题.在深入分析现有移动自组网络路由协议基础上,本文结合动态源路由协议的特点,提出了一种基于节点度值计算的Grover路由算法.该方法系统地研究移动自组网络的主要特征:节点度值、节点能量等,利用Grover搜索算法构造操作矩阵和概率扩散矩阵计算得...     

自组网中基于移动代理的具有移动和能量感知的AODV路由协议

自组网是由一组带有无线收发装置的移动节点组成的一个能够支持多跳的临时性的计算机通信网络．通过引入移动代理，结合本地移动和能量感知策略，该文提出了一种基于移动代理的AODV节能路由协议．仿真结果表明，该方案通过移动代理的漫游来更新途径节点路由表，大大减少路由请求报文发起数，降低了端到端的平均数据传输时延，并延长了网络的生存时间．     

一种新的移动自组网的数据传输策略*

为了提供移动自组网端到端的健壮的数据传输策略,对基于地理信息的路由协议进行优化,重点解决由于骨干节点停止工作后容易导致的整个网络快速崩溃问题,实现了能量的均衡。同时,根据排队理论,提出了一种移动节点的数据传输等候队列的调度策略,增加了移动自组网的端到端可靠的数据传输。基于NS的仿真实验,从路由协议选择、路由协议优化、数据传输等候队列调度策略方面展示提出的传输策略的优势。实验结果表明,该传输策略提高了节点能量利用率和节点生存时间,增加了数据传输的成功率,提高了网络的稳定性。     

移动Ad hoc网络中路由协议的能耗-性能联合比较

移动Adhoc网络是一种完全由移动主机构成的网络,网络拓扑易变,带宽,能源有限是其的突出特点。因此,高效路由协议的设计是Adhoc网络的基本问题之一。目前提出的各种路由协议各有它们的特点和优点。但是对这些路由协议的评价仅仅局限于单纯的网络性能或者能量消耗。该文在引入一种性能—能耗联合度量的基础上,对常见的DSR、AODV、TORA和DSDV四种路由协议进行了比较和评价。     

Managing real-time database transactions in mobile ad-hoc networks

In a mobile ad-hoc network (MANET), mobile hosts can move freely and communicate with each other directly through a wireless medium without the existence of a fixed wired infrastructure. MANET is typically used in battlefields and disaster recovery situations where it is not feasible to have a fixed network. Techniques that manage database transactions in MANET need to address additional issues such as host mobility, energy limitation and real-time constraints. This paper proposes a solution for transaction management that reduces the number of transactions missing deadlines while balancing the energy consumption by the mobile hosts in the system. This paper then reports the simulation experiments that were conducted to evaluate the performance of the proposed solution in terms of number of transactions missing deadlines, total energy consumption and the distribution of energy consumption among mobile hosts. Recommended by: Ahmed Elmagarmid This work is partially supported by the National Science Foundation grants No. EIA-9973465 and IIS-0312746.     

基于中国余数定理的移动自组网签名方案

作为一种新型的无线移动网络，移动自组网（mobile ad hoc network，MANET）的安全是现在主要的研究方向。MANET网络不同于传统的网络，因此需要一些新的安全机制。文章简要介绍了MANET网络体系结构特点所面临的问题和需要达到的安全目标，提出了一种基于中国余数定理的分布式门限签名方案，该方案与MANET的特性非常一致。文章还给出了一个采用RSA公钥系统的数字签名算法。分析表明，这种方案具有较好的计算性能。     

基于VBR业务模型的MANET DSR协议仿真性能分析

移动Ad Hoc网络(MANET)是由一组由移动节点组成的无线网络。MANET的性能已经被广泛的进行了研究,但是这些研究很多主要是针对节点的移动性和网络的规模来展开的。近年来,MANET在传输视频、音频、数据、图像等多媒体上的应用越来越多,因此对MANET在传输不同业务模型时的性能分析也引起了注意。本文中,我们主要研究分析了MANETDSR协议在传输VBR业务时的性能,并且将仿真结果和传输CBR业务时的结果进行了比较。通过进一步的分析,我们得出与传输VBR业务相比,在传输CBR业务时,MANET DSR协议性能明显提高。     

MANET中一种基于移动预测的unicast路由协议

MANET是由一系列可以自由移动的节点主机聚集而成的一个临时性动态网络。它没有固定基站,也没有作为控制管理中心的节点主机。由于其拓扑的动态性,其路由协议不同于其它网络。为更有效支持MANET的应用,文章提出了一种基于移动预测下的Unicast路由。该协议采用GPS定位机制,通过预测路径有效连接时间来实现。模拟结果表明这种方案能获得较好的网络性能和较低的控制开销。     

A weight-value algorithm for finding connected dominating sets in a MANET

In recent years, mobile devices are becoming popular and high-speed wireless communication is uproaring. In a wireless network environment, a mobile ad hoc network (MANET) has the characteristics of being infrastructure-free and self-organizing. Although the topology of MANET can be deployed easily with few restrictions, the maintenance faces great challenges. Furthermore, all nodes transmit packets by multi-hop in MANET. If transmission is by traditional broadcasting, it has a broadcasting storm problem and it can significantly reduce the wireless network throughput. The CDS (Connected Dominating Set) scheme is a well-known solution to the broadcasting storm problem. In a MANET, a virtual backbone network can be constructed by using CDS. All nodes can transmit data effectively through the virtual backbone network. In previous research on the subject, most algorithms are only suitable for a static MANET environment, with all nodes being stationary. This is contrary to the desirable characteristics of MANET. In this paper, we present an algorithm which is suitable for both static and dynamic MANET environments.     

Voice transmission over ad hoc network adapting optimum approaches to maximize the performance

Although a lot of research and implementations have been performed for voice transmission over regular network and internet, a little is done for mobile ad hoc network (MANET). Like other computer networks, in MANET voice transmission is also very much demanding and necessary. Since the wireless links in an ad hoc network are highly error prone and may go down frequently because of node mobility, interference, channel fading, and the lack of infrastructure, it is very difficult and challenging to implement voice transmission over MANET. In this research, to maximize the performance of MANET during voice transmission we choose some parameters and methodological approaches e.g. Method of media access, selection of audio codec, selection of routing protocol etc in efficient and optimum way. Since voice applications consume more energy than typical applications, we use an energy aware routing protocol known as WEAC for the study. During the selection process of routing protocol we have a performance comparison study between Improved DSR and WEAC, where WEAC performs better consuming less energy in case of larger network. We also have a comparative study among several audio codecs (G.711, G.729 and G.723.1) where by simulation we show that the G.729 codec is more suitable to use for voice transmission over MANET in terms of latency. Finally, we show that it is possible to launch voice transmission with acceptable quality and throughput over MANET using G.729 and WEAC protocol.     

An Improved Multi-Objective Particle Swarm Optimization Routing on MANET

A Mobile Ad hoc Network (MANET) is a group of low-power consumption of wireless mobile nodes that configure a wireless network without the assistance of any existing infrastructure/centralized organization. The primary aim of MANETs is to extend flexibility into the self-directed, mobile, and wireless domain, in which a cluster of autonomous nodes forms a MANET routing system. An Intrusion Detection System (IDS) is a tool that examines a network for malicious behavior/policy violations. A network monitoring system is often used to report/gather any suspicious attacks/violations. An IDS is a software program or hardware system that monitors network/security traffic for malicious attacks, sending out alerts whenever it detects malicious nodes. The impact of Dynamic Source Routing (DSR) in MANETs challenging blackhole attack is investigated in this research article. The Cluster Trust Adaptive Acknowledgement (CTAA) method is used to identify unauthorised and malfunctioning nodes in a MANET environment. MANET system is active and provides successful delivery of a data packet, which implements Kalman Filters (KF) to anticipate node trustworthiness. Furthermore, KF is used to eliminate synchronisation errors that arise during the sending and receiving data. In order to provide an energy-efficient solution and to minimize network traffic, route optimization in MANET by using Multi-Objective Particle Swarm Optimization (MOPSO) technique to determine the optimal number of clustered MANET along with energy dissipation in nodes. According to the research findings, the proposed CTAA-MPSO achieves a Packet Delivery Ratio (PDR) of 3.3%. In MANET, the PDR of CTAA-MPSO improves CTAA-PSO by 3.5% at 30% malware.