NAT TRAVERSAL UNDER TCP FOR REAL TIME STREAMING PROTOCOL

摘要

The present invention provides an improved RTSP protocol. Concepts and components similar to the SIP proxy server are introduced into conventional RTSP architecture. RTSP proxy server not only can assist RTSP media server under NAT firewall in positioning location and ensure that it can keep the RTSP channel connection but also provide the service about NAT port prediction. Furthermore, a brand new method about TCP traversal through NAT is applied in the improved RTSP in order to solve the peer to peer problem when the client and RTSP media server are both under NAT.