Method and apparatus for searching and downloading related contents by terminal through broadcast service

A terminal for acquiring contents related to an identified content, the terminal comprising:

• a transceiver configured to communicate with a server;
• and
• a controller configured to:
• control the transceiver to transmit a related content request message for requesting the related contents to the server, the related content request message including a content identifier of the identified content, and receive a related content response message including a global status code and a plurality of service guide fragments associated with the related contents from the server, wherein the service guide fragments includes one or more purchase item fragments including one or more references to service or content fragments, and purchase channel fragments, purchase data fragments,
• match service or content fragments in a stored service guide for each of the one or more references to check whether there is a missed service or at least one content fragment which is indicated in the purchase item fragments but is not included in the stored service guide,
• if it is determined that there is the missed service or at least one content fragment as a result of a failure of the matching, request the missed service or at least one content fragment, and
• initiate a service request procedure using information in purchase fragments which includes the received one or more purchase item fragments, purchase channel fragments, and purchase data fragments if a value of the global status code indicates success.