IP unicast streaming service delivery

摘要

A method of ordering the delivery of a unicast media stream to a second client terminal coupled to an IP Multimedia Subsystem network is described. The method comprises first sending a unicast media order from a first client terminal to an application server of said IP Multimedia Subsystem network. A Session Initiation Protocol INVITE message is then sent from the application server to said second client in response to receipt of said order, the INVITE message containing a media Universal Resource Locator identifying a media source. The Universal Resource Locator is used to exchange Real Time Streaming Protocol signalling between the second client terminal and the application server to initiate and control delivery of the media.