Patent ID: 8676987

Claim:
A method of retrieving session description protocol (SDP) file in an open IPTV terminal function (OITF), the SDP file being comprised of SDP parameters, the method comprising: performing a content reference identifier (CRID) location resolution, wherein an instance is identified by at least one of CRID and instance metadata identifier (IMI) instance metadata identifier; receiving session description protocol (SDP) parameters prior to a session set up; and controlling the session setup for processing a content by using the at least one of CRID and IMI, 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, wherein the SDP parameters are included in location information, further the location information including: the IMI identifying an instance of the content; and SDP mode attribute information identifying a mode for delivery of the SDP file.