论文标题:WCDMA核心网R4构架CS域软交换技术分析研究及MGR模块实现技术
The Study on the Nonself Elimination and Allocation Statics in Computer Immunology
论文作者 段洁
论文导师 李在铭,论文学位 硕士,论文专业 通信与信息系统
论文单位 电子科技大学,点击次数 164,论文页数 95页File Size11160k
2004-12-01论文网 http://www.lw23.com/lunwen_568567/ WCDMA 核心网络;软交换;呼叫控制;承载建立;媒体资源管理;软件设计与实现
WCDMA Core Network;Softswitch;Call Control;Bearer; Media Resources Management;Software Design and Implementation
通信网络向下一代网络NGN 发展的过程中,软交换技术得到了广泛的应用。无论是固定网络还是移动核心网络都逐渐引入了呼叫控制、承载以及业务相分离的软交换技术。在我国第三代移动通信系统大规模商用即将来临之际,各通信厂商都加紧了对3G 系统的研发。作为3G 主流制式之一的WCDMA 系统,其核心网络采用软交换技术向NGN 网络架构发展的研发以及应用实验的工作正在进行中。论文探讨了软交换呼叫控制与承载分离技术在第三代移动通信系统WCDMA 核心网电路交换域中的应用,主要研究了R4 网络架构下软交换系统软件设计,重点探讨了软交换无线媒体网关的资源控制模块的实现。首先,从软交换的原理、软交换网络结构、软交换服务器和媒体网关的功能原理以及软交换所使用的协议等方面较全面的阐述了软交换技术。其中,对在WCDMA 核心网中所使用的主要呼叫控制协议BICC 协议以及媒体控制协议H.248 协议给予了详细的讨论。其次,研究了WCDMA 核心网的网络架构,讨论引入软交换的R4 网络的优势所在,并给出R4 核心网CS 域的全IP 软交换网络解决方案。在该解决方案中研究了MSC 服务器和媒体网关WMG 的系统软件设计。通过对基本呼叫中呼叫控制和承载控制过程的分析,讨论软交换技术的实现。软交换承载独立的实现,要求媒体网关系统在充分理解与MSC 服务器标准化的软交换控制的基础上,能对各种承载和资源进行有效的控制。因此本文重点阐述了媒体网关中的核心模块——媒体资源管理模块的软件设计,探讨了集中式和分布式两种资源管理模块实现技术。最后介绍了WCDMA 软交换网络的测试要点,以及基本测试方法和测试工具等。
In the course of the evolution of communication network towards Next Generation Network, softswitch technology has been widely used. The concept of thoroughly separation of call control, bearer and service function is gradually introduced into the fixed network or mobile core network. Before the time that China formally launches the commercial usage of 3G system, many communication equipment producers are quickening their steps to the researching and developing of 3G systems. The core network of WCDMA, as one of the main systems of 3G, adopts the softswitch technology. In this dissertation is discussed the implementation of the softswitch technology, which is applied in the circuit switch field of WCDMA core network. Based on the researching of the software design of the softswitch system (MSC Server and WMG), is especially explored the media resources management module (MGR) in wireless media gateway (WMG). Firstly, the sotfswitch technology is introduced with following aspects: the basic theory of softswitch, the network architecture, the function principle of call server and media gateway, and the protocols mainly used in softswitch network. More emphasis is put on the BICC and H.248 protocols, which are mainly used in WCDMA core network. Then, the architecture of WCDMA core network is discussed, with the comparison of different releases of the network architecture (R99, R4 ) and analysis of the advantages of the R4 architecture in which the sotfswitch technology is used. After introduction of the all IP network solution, are investigated the software design of the MSC Server and wireless media gateway, and the cooperation of call control and bearer control in the basic call procedure. Along with the perfection of the network function, more and more kinds of media resources are introduced into the core network, which compels the WMG taking effective measurements to manage all of these media resources. So is explored the realization of MGR software module which takes responsibility of media resource management in WMG system. Considering distributed management structure much better for more kinds of bearer services than concentrated structure, the improved design of a new release is developed. In the end, are introduced the test methods and key test items in WCDMA mobile softswitch network.
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