摘要
研究了IETF关于NGN网络中会话业务穿透NAT技术的各种草案,结合网络的实际情况,对目前SIP业务开展可以使用的几种NAT穿越技术和方案进行了比较,提出了一种结合SIP协议扩展和MIDCOM协议构架的方法,解决了由于传统NAT/FW设备不支持SIP协议,而造成的私网内SIP终端同Internet上的SIP终端之间业务无法互通问题.通过用SIP信令建立的语音会话仿真表明,该方法具有可行性和有效性.
This paper looks further at the drafts proposed by IETF on session services in NGN system cross NAT/FW. We have compared several commonly used methods at present according to the network facts. At the same time, a new way based on protocol extension and middlebox communication framework is proposed, which permits SIP signal to traverse the traditional NAT/FW equipments and implements the service interworking of the SIP users between private network and Internet. By simulation of voice stream session dynamically using SIP, it is shown that the design is feasible and effective.
出处
《北京交通大学学报》
EI
CAS
CSCD
北大核心
2005年第2期26-30,共5页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
