MANET增强合作模型的理论研究

为了解决移动Ad hoc网络(MANET)中因保存能量而拒绝合作的节点自私性问题,对刺激合作的激励模型进行了研究,提出了将经济学上的委托——代理关系应用到Ad Hoc网络的发报方与参与转发数据包的节点上. 利用简化的博弈原理,使合作双方虚拟货币收支达到一定的纳什平衡. 模型将刺激合作方案设计转化为发报方的最优激励合同设计问题,从而在理论上保证发报方以最小的成本设计一种机制,促使转发节点尽力工作,在一定程度上抑制了合作中的自私性行为.     

一种延长网络生存时间的Adhoc路由策略

简要介绍了Adhoc网络中路由协议的特殊性,指出节点能量是Adhoc网络中影响系统路由生存时间的关键性因素,常规无线路由协议的建立大多数是基于源一目的节点跳数多少的的基础上,提出一种基于节点能量高低来优先建立路由的协议DDSR,并利用NS2软件对DSR、DDSR进行仿真,结果显示DDSR相对于DSR提高了系统生存时间。     

一种Ad hoc网络中的主动式QoS路由设计

随着移动技术的发展,QoS已经成为Adhoc网络中的研究热点。在最短路径算法的基础上,对在TDMA机制下的自组织网络主动式QoS路由进行改进,将带宽和误码率作为约束条件,把实际自组织网络中各个节点占用时隙的先后而影响传输时延作为路由判决的主要依据,较好地避开了干扰和拥塞,从而获得了较高的系统吞吐量,并进行了模拟仿真,验证了协议的有效性。     

Modeling delay and packet drop in Networked Control Systems using network simulator NS2

Wireless Networked Control Systems (WNCS) are used to implement a control mechanism over a wireless network that is capable of carrying real-time traffic. This field has drawn enormous attention from current researchers because of its flexibility and robustness. However, designing efficient WNCS over Mobile Ad Hoc Networks (MANET) is still a challenging topic because of its less-predictable aspects, such as inconsistent delay, packet drop probability, and dynamic topology. This paper presents design guidelines for WNCS over MANET using the Network Simulator version 2, NS2 software. It investigates the impact of packet delay and packet drop under the AODV and DSR routing protocols. The simulation results have been compared to MATLAB results for validation.     

MANET自组织按需认证模型的研究

构建安全可信的MANET 必须考虑到其自身的特性。目前关于MANET 的安全认证研究大多是利用中心认证服务器为用户颁发证书,较少考虑到MANET 自身的自组织特点,很难完成网络的快速部署。结合MANET 的特性,提出一种自组织按需式认证方案。该方案不需要中心认证服务器,充分利用节点自身功能,在完成身份认证的同时具有良好的伸缩性。     

基于CC1110的无线自动抄表方案

介绍了一种新的用于抄表系统的无线自组网路由协议,该协议具有多点路由,信道侦听,自主生成路由,协议精简等特性,适合在电表抄表中使用。     

基于动态令牌托管的Ad hoc网络安全路由机制

作为Ad hoc网络大规模应用的先决条件,安全问题必须得到解决.为了加强节点间认证的安全性以及对合法路由的保护,提出一种基于动态令牌托管DTE(Dynamic Token Escrow)的Ad hoc网络安全路由机制,引入带有生存期的令牌控制网络实体间的信任关系,通过托管集实现本地化认证.仿真结果表明,在不安全的网络环境下,本文机制减少了认证消息交互,提高了路由建立的效率.     

移动自组网中基于预测的路由协议研究

由于移动自组网中的节点可以任意的运动，导致网络中传输路径的频繁断裂，大量的重路由操作降低了网络性能，并占用了有限的网络资源。而基于预测的路由协议能够有效地减少网络拓扑结构的变化对于路由操作的影响。文章主要讨论了目前已经提出的几种节点运动预测方案．以及基于预测的路由协议，并提出了进一步的研究方向。     

Energy‐efficient cluster manager‐based cluster head selection technique for communication networks

The Mobile Adhoc Network (MANET) is a distributed network without any standard infrastructure. In MANETs, several nodes in the network are grouped by which they can communicate with each other. Clustering is a grouping of mobiles nodes performs the communication process by means of optimal usage of available bandwidth and high network throughput. Several clustering schemes exist, but they suffer from the consumption of energy because of the cluster head's workload and increase in the number of clusters. In this paper, we propose a cluster manager‐based cluster head selection (CMBCH) scheme to overcome the energy problems and leverage CH workload. CMBCH consists of two components, such as cluster manager (CM) and cluster head (CH). The CM takes the responsibility of controlling and monitoring of nodes activities. The CH leads and performing packet transfer among the nodes in the network. At this stage, when current CH energy level is drained, CM elects the corresponding node with high energy level and the new, as well as old CH activities, are simultaneously stored by CM. To prove the proposed scheme efficiency, a simulation experiment was conducted for 20 to 100 nodes under the AODV routing protocol. The network parameters packet delivery ratio and energy consumption are compared for the CMBCH,DLC and HCAL. The obtained results are compared to others; CMBCH conserves minimal energy and bandwidth and also achieves reliable throughput through stable routing.     

自组织网络中基于ID加密的自启动分布式CA

本文针对自组织网络无中心、易受攻击等特点提出了一种基于ID加密的自启动分布式CA模型,讨论了自组织网络中基于ID加密的自启动分布式CA的形成,密钥更新,对入网节点的阈值签名,以及入网节点自身分钥/私钥对的产生过程。