【作者】 杨洋；

【导师】 卢建军；

【作者基本信息】 西安科技大学 ， 通信与信息系统， 2008， 硕士

【摘要】 陕西煤矿瓦斯监测联网是针对目前矿井瓦斯灾害严重的状况,采用具有标准性和通用性的信息通信方式,将煤炭企业安全生产的工业网络接入到IP网络平台上,形成信息化网络数据资源传输体系,该体系建成后能够充分提高数据的利用率和共享度。同时,也对联网网络的QoS(服务质量)提出了更加严格的要求。QoS是一个用于衡量服务满意程度的综合指标,是用来解决网络延迟和拥塞问题的技术。作为研究使网络能够灵活地根据业务的具体特点保障瓦斯监测数据等工业信息在IP网络平台上传输的服务质量,是具有重大意义的。本文以国家863计划资助的项目《煤矿数字化瓦斯远程监测监控系统》(项目编号:2005AA133070)中陕西煤矿瓦斯监测远程联网为背景,研究其联网网络的QoS保障策略的实现。由于现有的各种QoS实现机制,无法单独为陕西煤矿瓦斯监测联网网络的QoS提供保障,因此在实际应用中必须结合多种机制才能得到较好的QoS保障效果。本文比较了传统IP网络的QoS结构体系,通过分析IntServ和DiffServ两种模型的基本原理、工作方式,并指出其各自的优缺点和网络应用环境,设计了将RSVP协议与DiffServ模型相结合来满足瓦斯监测数据传输实时性的要求;针对陕西煤矿瓦斯联网的特性,提出了将TCP拥塞控制算法与IP层拥塞控制算法相结合的算法模型;在设计了陕西煤矿瓦斯监测系统联网网络拓扑结构的基础上,通过联网网络端到端的QoS改造最终实现了联网网络QoS保障策略的部署。最后,通过对QoS拥塞控制算法模型进行模拟与仿真,验证了该模型的设计能够较好地满足课题的预期QoS保障目标。并且此模型的应用可以在原有单一拥塞控制的基础上有效地提升跨地区网络的QoS特性。更多还原

【Abstract】 The monitor platform of Shannxi coalmine gas network take aim at the gas disaster which has a serious status in the coalmine at present, and adopt standard and general communication manner to construct transfer system,and transplant the industry network of coal corporation to the IP network platform which form information-based network data source and improve the degree of data utilization and data share at the base of that. How to resolve the demand of IP network QoS and ensure the industry information such as gas monitor to transfer neatly in the network according to business characteristics, which is the problem that will be discussed and resolved.This paper is imbursed by the nation 863 project item《A gas remote monitoring system of digitalization in coal mine》(project No. 2005AA133070), which makes the gas remote monitor network be a background to do some research on the QoS guarantee of the network. QoS is a synthesis guide line that be used to estimate the degree to satisfy with some server, which is a technology to solve the problem of delay and congestion in network. We must integrate multi-QoS mechanism to get good QoS guarantee in the practical application. This paper demonstrated three QoS models in the IP net application and homologized affective factors. Meanwhile, the field of QoS protection strategy arrangement in Shannxi coalmine gas network is been picked up as the example. For this situation, the comparison to the different QoS models is doing strictly. By combining the TCP congestion control arithmetic with IP congestion control arithmetic, the paper also emphatically describes the corresponded arithmetic model for that. Stimulatingly, it is promoted the QoS characteristic over-area effectively, which it is based on the original single congestion control. To accomplish the deployment of network QoS guarantee strategy after analyse and rebuild the whole network QoS, which is based on the topology frame of gas monitor system network.Finally, the imitation and simulation of gas monitoring network QoS guarantee strategy model has been taken. There are indication that the result could be satisfied with the goal of the project design, which also promotes the QoS characteristic of Shannxi Coalmine gas monitor system network.更多还原