Patent ID: 9344756
Filing Date: 2016-05-17
CPC Classification: H04N

Claim Text:
1. A method for transporting files from a cable headend, comprising: providing at the cable headend a plurality of files for transmission to a subscriber device, wherein each of the plurality of files includes a unique filename; providing different data identifiers (DIDs) determined from each of the unique filenames, respectively, using the DID determined from each unique filename to calculate a unique packet identifier (PID) and a multicast ID for each corresponding unique file name, wherein the PIDs and the multicast IDs distinguish the unique filenames from one another, and assigning file identifiers to each of the plurality of files where each of the file identifiers comprise of a PID, a DID and a multicast identifier; packetizing the plurality of files into packets, wherein each of the packets corresponding to one of the plurality of files is provided with the unique PID, the DID and the multicast identifier corresponding to the unique filename of the one of the plurality of files; and filtering a selected file from the plurality of files by selecting the packets having the unique PID, the DID and the multicast identifier corresponding to the unique filename associated with the selected file; and determining, for each of the files, a second identifier based on the DID of the file, wherein the second identifier is a PID formed by concatenating at least two portions of the DID.