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在ATM网络中用户传输数据之前必须建立一个连接.在多媒体通信连接建立过程中的一个重要问题是如何提供对服务质量(Qos)的参数描述,以及信令实体对这些参数的响应和处理.针对ATM局部网络环境下的多媒体通信连接的建立过程予以论述.通过分析不同种类多媒体信息的特征和服务质量Qos的描述参数,提出信令系统所应完成的功能.并对在用户端系统中使用的信令系统应用编程接口(API)的结构进行了研究.
In the ATM network users must transmit data before establishing a connection. A key issue in the establishment of multimedia communication links is how to provide a description of the parameters of quality of service (Qos) and the response and handling of these parameters by the signaling entity. The establishment process of multimedia communication connection under ATM local network environment is discussed. By analyzing the characteristics of different types of multimedia information and Qos description parameters of quality of service, the signaling system should be completed functions. The structure of the Signaling System Application Programming Interface (API) used in the client system is also studied.