Patent ID: 7917637

Claim:
A method for establishing an interactive media session based on an IP Multimedia Subsystem, comprising: receiving, by a media control entity, an interactive service request initiated by a terminal; controlling, by the media control entity, a media carrier entity to negotiate a first address port for RTSP connection and a first address port for RTP connection to communicate with the terminal; and establishing a RTSP connection for interactive control and a RTP connection for media stream delivery between the terminal and the media carrier entity; wherein the interactive service request carries the terminal's information about a second address port for RTSP connection and a second address port for RTP connection; and the controlling, by the media control entity, the media carrier entity to negotiate the first address port for RTSP connection and the first address port for RTP connection to communicate with the terminal comprises: controlling, by the media control entity, the media carrier entity to interact, and acquiring the first address port allocated by the media carrier entity for RTSP connection and the first address port allocated by the media carrier entity for RTP connection; and returning, by the media control entity, a service request response to the terminal, wherein the service request response carries the first address port for RTSP connection and the first address port for RTP connection.