【作者】 张楠；

【导师】 孟洛明；

【作者基本信息】 北京邮电大学 ， 计算机科学与技术， 2008， 博士

【摘要】 现今网络规模和复杂度日益增长,传统的集中式管理模式已经不能满足网络管理的需求,网络管理研究也随之向分布式管理模式发展。Web Services作为一种新兴的分布式技术,以其良好的特性得到了广泛的支持,也展现了其在刚络管理中良好的应用前景。本论文将研究Web Services管理关键技术,以及如何利用Web Services技术解决目前网络管理架构中存在的问题。本论文研究了Web Services管理中质量评价、SLA模板、业务流程管理、定价方法等关键技术,并提出了基于Web Services的网络管理架构,同时实现了原型系统验证此架构和关键技术。论文主要研究内容和创新点如下:(1)基于立体QoS模型的Web Services质量模糊评价方法分析了Web Services的服务质量需求,以及现有服务质量评价方法适川范围的局限性,根据Web Services的质量属性提出了WebServices立体QoS模型,给出其中若干关键质量指标的量化定义,在此基础上应用模糊数学中的模糊算法设计了Web Services质量模糊评价方法,指导Web Services生命周期中服务选择、实时监控、管理和计费等各阶段的质量评价应用。(2)基于Web Services的SLA模板表示方法分析了已有的SLA模板存在的问题,如缺乏统一的信息模型、SLA元素的含义不明确、无法重用已有的模板定义、不能实现灵活和自动化的SLA管理等,针对以上问题提出了基于Web Services的SLA模板表示方法,对支持Web Services的SLA进行建模并给出形式化的表示方法,并提出了SLA生命周期管理模型。(3)基于SLA的Web Services业务流程管理分析了目前Web Services业务流程管理方法及其不足,为WebServices提出了一种基于SLA的业务流程管理方法:对基本的WebServices体系结构进行了基于SLA的信息和角色扩充,从商务模型中三种不同角色的视点对其进行了详细的描述;然后参考NGOSS的eTOM中“直通”的垂直分析方式,提出了业务管理模型;并采用“全生命周期”的水平分析方式,定义了一种带有反馈机制的闭环业务流程。(4)支持QoS的Web Services定价方法分析了目前Web Services定价方法的不足,为Web Services设计了一种支持QoS的定价方法,这种方案既对使用的带宽进行定价,还对多维QoS参数进行了考虑,并加入反馈机制对最终服务单元价格进行了调整,比其他已有的定价方法在技术、网络、用户和经济等方面的需求相比有较好的平衡性,对实际应用中Web Services定价方法制定和实现有指导意义。(5)基于Web Services的网络管理架构分析了已有的网络管理架构不能支持网络管理系统间动态协作的问题,采用Web Services技术和TNA原则,提出了基于WebServices的网络管理架构,描述其组成及其运行机制。更多还原

【Abstract】 With the increasing of size and complexity of network, the traditional centralized management pattern could not meet requirments of network management, and the deveopment of current network management is toward distributed management pattern. As a rising distributed technology, Web Services has the broad support and application, and it also shows its promising future in network managment field. The dissertation tries to research key technologies of management of Web Services, and how to utilize Web Services to solve problems of architecture of network management.This dissertation studies the key technologies such as quality evaluation, SLA template, service process management, and pricing method, and provides network management architecture based on Web Services. Also, a prototype is designed and implemented to verify the architecture and technologies. Generally speaking, the main points and novelties of this dissertation can be summarized as follows:(1) A Fuzzy Evaluation Approach of Web Services Quality based on Tri-dimensional QoS ModelThe requirements of Web Services QoS and the limit of applicability scope of existing evaluation approach of Web Services Quality are analyzed. A tri-dimensional quality of service model of Web Services is provided, and a few key quality indexes are defined in detail. Based on the QoS model and fuzzy algorithm in fuzzy mathematics, a Web Services fuzzy quality evaluation approach is introduced, which aims to assist the quality evaluation application of Web Services in different phases of the whole lifecycle.(2) A Representation Approach of SLA Template based on Web ServicesThe problems of existing SLA template is analyzed, such as lack of general information model, ambiguity of defination of SLA element, difficult to reuse of SLA template defination and to realize SLA management flexible and automatically. A representation approach of SLA template based on Web Services is provided to solve the problems above. The information model and formal representation of SLA of Web Services are introduced, and management model of whole-lifecycle of SLA is provided.(3) SLA-based Service Process Management for Web ServicesThe limit of approaches of Web Services process management is analyzed, and a service process management method based on SLA is provided for Web Services. An extended architecture with additional roles and information of Web Services based on SLA is provided, and a service management model is introduced based on a "flow-through" vertical analytic approach of Enhanced Telecom Operations Map (eTOM) model in New Generation Operations Systems and Software (NGOSS), and then the implementation of closed-loop service process with feedback mechanism using prepared and customized services based on "full-lifecycle" horizontal analytic method is discussed.(4) A Pricing Method Supporting QoS for Web ServicesThe limit of current pricing methods of Web Services is analyzed, and then a pricing method supporting QoS for Web Services is provided. The method prices the bandwidth and QoS of multi-dimends, and adds mechanism of feedback for last service unit price. The provided method has the better balance among the technology, netwoek, user and economic, and has the important guide meaning for practical pricing method of Web Services.(5) A Network Management Architecture based on Web ServicesSince the current network management is available to support dynamic cooperation through analysis, a network management based on Web Services is provided according to the Web Services technologies and principles of technology neutral architecture (TNA) to solve the problem of dynamic cooperation between different telecom network management systems. The members of the architecture and inner mechanism are introduced.更多还原