Patent ID: 8554923

Claim:
A method of retrieving at least one parameter of a SDP (session description protocol) file prior to a session setup in an open IPTV terminal function (OITF) receiver, the method comprising: performing a content reference identifier (CRID) location resolution process of mapping a CRID to either other CRIDs or a location information, wherein the location information provides additional data to retrieve the content; retrieving the at least one SDP parameter prior to the session setup, the retrieving comprises, firstly requesting by the OITF receiver to an Internet protocol multimedia subsystem Gateway (IG) on a home network interface-IG interface (HNI-IGI) interface, the at least one SDP parameter; secondly requesting by the IG to a network, the at least one SDP parameter, wherein the content is identified by at least one of CRID and Instance Metadata Identifier (IMI); retrieving, by the IG, the at least one SDP parameter from the network; forwarding the at least one SDP parameter from the IG to the OITF receiver; and performing the process of the session setup after the OTIF receiver has retrieved the at least one the SDP parameter, wherein the CRID location resolution process further comprises: transmitting the CRID to a location resolution server; and receiving other CRIDs or location information based on a content referencing table from the location resolution server.