【作者】 林健；

【导师】 梁加红； 郭炎鑫；

【作者基本信息】 国防科学技术大学 ， 控制工程， 2006， 硕士

【摘要】 战术互联网是基于开放的TCP/IP标准协议集成的战术前沿数据通信网络,为各级作战部队的战术通信与指挥控制系统提供安全、可靠、无缝的无线网络互连。随着无线通信技术的迅猛发展,无线分组网络正迅速成为现代军事通信基础设施的重要组成部分。Ad hoc网络是一种由无线移动节点组成的分布式、自组织无线分组网络,具有不依赖于固定基础设施、抗毁性强、可快速展开等优点,特别适用于战术军用和救灾抢险场合以及无法架构通信基础设施的偏远地区的通信。武警部队是国家保障公民生命财产安全、反恐和处置突发事件的重要力量,要求在事发地域能够快速、有效地建立起支撑指挥、控制、侦察的C4ISR信息平台,因此,采用无线Ad hoc网络构建武警战术互联网。研究Ad hoc网络协议,并最终建立适合武警部队业务特点的战术互联网络,对提高武警部队作战能力具有重要的实际意义。本文首先介绍了无线分组网络的概况,根据武警部队战术指挥的特点,提出了基于Ad hoc网络设计的分层网络模型,详细介绍了Ad hoc网络关键技术中的信道接入MAC(媒介访问控制)协议和路由协议。对应网络模型,在OPNet软件平台上搭建武警战术互联网仿真框架,重点用于研究MAC协议和路由协议。MAC协议是控制网络节点接入无线共享信道的规则,Ad hoc网络无中心、多跳结构使得MAC协议的设计具有很大挑战性。文章详细论述了Ad hoc网络主要使用的IEEE802.11 DCF(分布式协调功能)接入机制的工作原理,通过二维马尔科夫链推导出了理论值下的吞吐量。比较理论推导的吞吐量与仿真得出的结果,分析了影响信道接入吞吐量性能的因素,为掌握Ad hoc网络MAC层的工作原理,以及Ad hoc网在武警战术互联网中的应用提供了参考。更多还原

【Abstract】 Tactical Internet, a compositive tactical front-line data communication network,is based on the standard protocol TCP/IP, which can provide the safe steady seamless wireless nertwork connection for the tactical communication command and control system of the all levels compaign army.Along with the fast development of the wireless communication technology, the wireless packet network is rapidly becoming the important elements of the modern military communication.Ad hoc network is a kind of distributing self-organized wireless packet network made up of wireless mobile nodes.Therefore, it can work without any from fixed basic network.It is so easy to deploy in short time and robust to destruction that Ad hoc network greatly adapt to the tactics-martial and disaster-relieving situation, especially adapt to the remote area’s communication where can’t build up the basic communication establishment.The armed forces police army is the important force of the country to protect the civic life and estate, fight against the terrorism and dispose the gusty event.It require to build up the information system to support C4ISR quickly and effectively in the accident area.Thus Ad hoc network is choosen to design the armed forces police army tactical internet.We must research the Ad hoc network protocol.It has important practical significance for improving the armed forces police army’s battle ability to set up the tactical internet with the armed forces police army’s operation characteristics finally.At first, the article gives the general introduction about the wireless packet network and forward the layered network model based on Ad hoc network. Then, it explains the Ad hoc network’s key technologies:MAC protocol and route protocol in detail. In accordance with network model, we use the OPNet simulation software to build up the simulation framework of the armed forces police army’s tactical internet. The framework will be mainly used to research the MAC protocol and route protocol.MAC protocol is the rule which controls the network nodes to access the wireless share channel. Ad hoc network’s no-center and multi-hop structure make the MAC protocol design very challengable.In the article we detailedly discuss the operation principle on the IEEE802.11 DCF(distributed coordination function) access mechanism which is mainly used by Ad hoc network and we get the theoretic throughput through the two-dimension Markov chain model. In the end, we compare the theoretical value with the simulation result and compare each other validity. The paper analyzes the factor which will influence the capability of the channel access throughput.It will provide useful reference to understand the Ad hoc network’s mac layer operation principle and the appliance of the Ad hoc in the armed forces police army’s tactical internet.更多还原