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SIP是由IETF制定的多媒体通信协议。它打破了传统电信业务的传输模式,将蜂窝系统与因特网应用融合在一起提供基于IP的多媒体业务。本文简单介绍了SIP协议的功能和消息结构,分析并仿真了一个基本呼叫实例。
SIP is a multimedia communications protocol developed by the IETF. It breaks the transmission model of traditional telecom services and combines cellular systems with Internet applications to deliver IP-based multimedia services. This article briefly introduced the SIP protocol function and message structure, analyzes and simulates a basic call instance.