摘要
NGN是一个基于IP的全新通信网络,融合了语音、数据、多媒体等多种业务。NGN以软交换为核心,SIP作为软交换的呼叫控制信令协议,简单、开放、灵活、可扩展,已成为NGN的重要技术。本文主要分析了SIP网络结构、SIP消息内容、SDP协议以及SIP在NGN中的应用。
NGN is a new IP communicationnetwork and provides many services such asvoice, data, multimedia and so on. Soft switchbecomes the core technology in NGN. As acalling control signaling protocol in Soft switch,SIP has simple, opening, flexible, extendablecharacter and has became an important technol-ogy in NGN. It will briefly introduce SIP networkstructure, SIP Message, SDP , and the appli-cation of SIP in NGN.
