標題: A Survey of NAT Behavior Discovery in VoIP Applications
作者: Hunag, Shiang-Ming
Wu, Quincy
資訊工程學系
Department of Computer Science
關鍵字: NAT;STUN;NAT behavior discovery
公開日期: 1-Mar-2011
摘要: Because of the foreseeing depletion of Internet Protocol (IP) addresses, Network Address Translation (NAT) is ubiquitously deployed to allow hosts to connect to the Internet through a single shared public IP address, which is a popular approach in deploying wireless local area network (WLAN). Although NAT proves to work well with traditional client/server applications, its existence and non-standard behaviors are the major problem which cripples voice over IP (VoIP) applications. In addition to some efforts which attempt to devise complicated protocols to tackle all NAT varieties, there are also efforts in Internet communities trying to standardize the behaviors of NAT. Therefore, it becomes crucial for a network device to discover the existence of NAT in its subnet and to determine the NAT behaviors, so that it can choose the optimal NAT traversal mechanisms to apply. In this paper, we surveyed the divergent NAT behaviors and then proposed a simplified NAT behavior discovery approach which is more suitable for VoIP applications. The proposed approach can reduce the call establishment time of VoIP applications, which is useful in scenarios where VoIP devices are administrated within a specific domain, e.g., 3G cellular networks.
URI: http://hdl.handle.net/11536/9203
ISSN: 1607-9264
期刊: JOURNAL OF INTERNET TECHNOLOGY
Volume: 12
Issue: 2
起始頁: 199
結束頁: 210
Appears in Collections:Articles