Patent ID: 8228909

Claim:
A method of compressing, at a transmission end, an original Internet Protocol (IP) packet which is transmitted as broadcasting data through a broadcast network where an end of a path transmits data through a communication network to unspecified end users, the method comprising: determining field values including at least one fixed value and at least one value that is calculated through inference after a compressed IP packet is transmitted through the broadcast network in a header of the original IP packet by using a characteristic of the broadcast network; removing the determined field values from the header; and generating an IP packet with a header formed only with the remaining field values, wherein the determining of the field values is performed by referring to a template having a header of a fixed IP packet, and the template is created prior to handling any broadcasting data at the transmission end, and the template is stored at the transmission end prior to handling any broadcasting data at the transmission end, wherein in the determining of the field values, at least one predefined fixed value among field values included in the header of the original IP packet, a field value that is determined from an encapsulation header added to the generated IP packet, and a field value that is calculated from the header of the generated IP packet are determined, and wherein the generated IP packet is encapsulated according to a transmission structure of the broadcast network.