Patent ID: 8307393

Claim:
A method of transmitting a broadcast signal for non-real time service, the method comprising: generating the broadcast signal having the non-real time service, signaling data for signaling the non-real time service and file delivery table providing a means to describe attributes for files associated with a non-real time content in the non-real time service, wherein the signaling data includes a service map table containing service-level attributes for the non-real time service and a non-real time information table containing information describing content items available for download to storage in a broadcast receiving device, the service map table including information used as a linkage to a non-real time information table, the non-real time information table includes content linkage information used to link metadata in the non-real time information table to at least one file described in the file delivery table associated with the non-real time content; and transmitting the non-real time service via a broadcast channel, the signaling data via a service signaling channel with a specific Internet Protocol (IP) address and user datagram protocol (UDP) port number, and the file delivery table via an Asynchronous Layered Coding/Layered Coding Transport (ALC/LCT) session, wherein the non-real time information table includes an availability indicator indicating whether the files associated with the non-real time content are available over an interaction channel, and the file delivery table further includes content location information specifying uniform resource locator (URL) for each of the files when the availability indicator indicates the files are available over the interaction channel, wherein the non-real time information table further includes expiration information representing expiration time of the non-real time content for guiding the broadcast receiving device to delete the non-real time content stored in the storage of the broadcast receiving device.