基于会话边界控制的SIP协议NAT穿越方法  

NAT Traversal in Accordance to SIP Based on Session Border Controller

作　　者：赵博[1] 闻英友[1] 赵宏 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2008年第8期1100-1104,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(60602061);国家高技术研究发展计划项目(2006AA01Z413)

摘　　要：针对现有NAT穿越方案中存在的问题,提出了一种基于SBC的SIP协议NAT穿越方案,通过对控制信息流和媒体流的同时中继实现NAT穿越.对SBC的系统架构进行了说明,详细分析了不同应用场景下的NAT穿越流程,并对该穿越方案进行了功能验证与性能测试.结果表明,与其他传统穿越方案相比,该方案能够在不更改任何网络配置和网络设备的前提下实现透明的NAT穿越,并解决了传统NAT穿越方案中的效率问题.According to the problems in the present NAT schemes, an NAT traversal in accordance to SBC-based SIP protocol is proposed, which is implemented by relaying simultaneously both the SIP signaling messages and RTP media streams. With the system architecture of SBC illustrated, the NAT traversal process is analyzed in detail under different applications. The results of functional analysis and performance test showed that the proposed NAT traversal in comparison with other conventional schemes is available to implement transparent traversal with no change required for network configuration and improved efficiency provided.

关 键 词：会话初始化协议 会话边界控制器 网络地址转换 下一代通信网络 IP多媒体系统 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]