标题: | 在通用行动电话系统下支援动态服务之高效率代理人平台 An Efficient Agent-based Platform for Dynamic Service Provisioning in UMTS |
作者: | 柯元琳 Ko Yuan-Lin 王国祯 Dr. Kuochen Wang 资讯科学与工程研究所 |
关键字: | 虚拟家庭环境;通用行动电话系统;行动网路增强逻辑之订制应用;行动代理人;一般物件要求代理架构;Virtual Home Environment;Universal Mobile Telecommunication System (UMTS);Customized Applications for Mobile Enhanced Logic (CAMEL);Mobile Agent;CORBA |
公开日期: | 2001 |
摘要: | 在虚拟家庭环境中最重要的关键概念是动态服务之提供。动态服务之提供允许使用者在不同的网路环境中使用不同样式的装备来动态地存取各种不同的服务。在第三代通讯系统及之后的电话网路将都会有这样的功能。因此使用者可以在任何时间动态地订阅新的服务。而系统业者和服务提供者也可以立即动态地来提供该项服务给新订阅的使用者。而在第三代行动通讯夥伴合作计画(3GPP)的通用行动电话系统(UMTS)也考虑到这个目标,因而提出行动网路增强逻辑之订制应用(CAMEL)架构。依据此架构,我们提出了一个有效率的行动代理人平台来提供动态服务,而这个平台可以大量地减少讯息的流量。为了评估这个平台,我们使用来话与发话的例子来说明行动代理人的运作。另外我们建构一个机率模式来计算讯息流量与服务下载的期望值,藉此来分析平台效能。而这个结果可以帮助系统业者来了解不同因素对网路效能的影响。在现存的方案中,在通用行动电话系统之分散处理环境是采用基于一般物件要求代理架构(CORBA)的行动代理人平台。而这个平台需要一个标准以便在不同厂商所开发的行动代理人环境下互容与整合。因此,物件管理联盟(OMG)已制订移动代理人系统互容机制(MASIF)来做互容与整合的工作。然而这个方案仍存在一些安全与效能的问题。效能分析显示,我们所提出的行动网路增强逻辑之订制应用行动代理人平台可以比基于一般物件要求代理架构(CORBA)之平台减少40%的讯息流量。因此我们所提出的平台不但可以提供有效率的效能和行动管理,也可以加强平台的安全性和互容性。 An important key concept of the Virtual Home Environment (VHE) is dynamic service provisioning. Dynamic service provisioning allows users to access all kinds of services dynamically from different types of devices in different networks. In 3G and B3G, the telecommunication network will have such a capability. The users can dynamically subscribe new services anytime, and the system operator or service provider can dynamically provide services to subscribed users immediately. The goal was considered by the Universal Telecommunication Mobile System (UMTS) in 3GPP, and the Customized Applications for Mobile Enhanced Logic (CAMEL) architecture was then proposed in UMTS. Based on the UMTS CAMEL architecture, we propose an efficient mobile agent–based platform to provide services dynamically, which can greatly reduce the signaling traffic. To demonstrate the efficiency of our agent-based platform, we use the operations of incoming and outgoing calls to illustrate the operation of mobile agents. We also constructed a probabilistic model to analyze the performance of expected traffic volumes that include signaling and service downloading traffic. The results can help system operators to understand the impact of different factors on network performance. In an existing approach, a CORBA agent-based mobile agent platform was deployed on a distributed processing environment in UMTS, and they required a standard, OMG Mobile Agent System Interoperability Facility (MASIF), to be interoperable between agent environments of different vendors or operators. However, there are some problems in this approach, such as problems in the aspects of security and performance. Analysis shows that the signaling traffic in our UMTS CAMEL agent-based platform can be reduced 40% in outgoing call scenarios compared to that in the CORBA agent-based agent platform. Our platform can provide efficient mobility management, and enhance network performance, security and interoperability. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#NT900394042 http://hdl.handle.net/11536/68567 |
显示于类别: | Thesis |