METHOD AND APPARATUS FOR DISCOVERING INTERNET PROTOCOL TELEVISION SERVICE (IPTV) PROVIDER AND IPTV SERVICE BY USING SESSION INITIATION PROTOCOL

摘要

Provided are a method and apparatus by which a first entity receives information about one or more Internet Protocol Television (IPTV) service providers or information about one or more IPTV services from a second entity by using a Session Initiation Protocol (SIP) message.