NGN中一个通用业务描述模型的研究
doi: 10.3724/SP.J.1146.2007.00002
Study on a Universal Service Description Model for NGN
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摘要: 该文提出NGN(Next Generation Network)中一个独立于实现细节与底层网络的业务描述模型FE-FR SDM(Four Elements - Full Relations Service Description Model)。此模型包含4个元素：端点，通信链接，用户与通信链接的关联，通信链接之间的关联。分析了端点、通信链接的特征与属性，二者属于业务的静态元素；使用有向图描述用户与通信链接的关联、通信链接之间的关联，二者构成业务的动态行为。此模型包含业务需求分析所需的主要属性，可以容纳任意多个通信方，通信方之间以任意的通信方式相关联。对比分析了该模型与其他现有模型的优缺点，并通过多媒体会议业务的描述实例验证了此描述模型的可用性与有效性。Abstract: An implementation and network platform independent model for NGN service description, FE-FR SDM (Four Elements - Full Relations Service Description Model), is proposed. This model consists of four elements: EP (EndPoint), CL (Communication Link), REL (Relations between Endpoints and Links) and RL (Relations between Links). The characteristics and the attributes of EP and CL are analyzed which are static parts of a service and REL and RL are described by directed graphs which model all possible behavior of the service. This model contains most basic properties used for requirements analysis and service architecture design, can support arbitrary number of users and one user can communicate with others in an arbitrary way. The comparison analysis with FE-FR SDM and other existent models is made, and a multimedia service is described to verify the practicability of this model.
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