摘要
随着IP数据业务的蓬勃发展,基于分组的多媒体通信系统标准H.323、SIP、MGCP等被广泛运用于视频会议和IP电话中。VoIP是新一代网络时代发展起来的最具代表性和发展前途的应用技术之一。SIP作为VoIP中的一种信令控制协议,具有很大的增长潜力。因此为了更好地推广VoIP业务的发展,解决好SIP穿越NAT的问题将是一个重大的研究课题。本文主要是在STUN方法的基础上,针对其无法穿越对称型NAT的缺陷展开研究的,提出了一个改进的新方案,从而达到穿越双对称型NAT的目的,改进方案较其它穿越双对称型NAT的方案较好地避免了包的延时和丢失的可能性。
With the rapid development of data service,Packet-Based Multimedia Communication System standards such as H.323 、 SIP、MGCP etc are widely used in Video Conference and IP Phone. VoIP developed from New Generation Network which is one of the most representative and perspective application technologies.SIP as one of signal control protocols of VoIP has great growth potentialities.So in order to extend the development of VoIP service,solving the problem of SIP traversal well will be an important research topic. In this paper,mainly on the base of STUN method,pointing to its defect which can not traverse symmetric NAT we have been studied and proposed a new improved method which can traverse symmetric NAT.This improved method avoid possibility of packet-delay and packet-lost well compared with other methods.
出处
《微计算机信息》
2010年第3期111-112,95,共3页
Control & Automation
