Multi layer internet protocol(MLIP) for peer to peer service of private internet and method for transmitting/receiving the MLIP packet

摘要

Provided is a Multi-layer Internet Protocol (MLIP) for peer-to-peer service of a private Internet and a method for transmitting/receiving a MLIP packet through IPv4 backbone network. The Multi-layer Internet Protocol (MLIP) packet comprises a source address field for saving a public Internet address of the source; a destination address field for saving a public Internet address of the destination; and an option field including, an option class field for saving data indicating that the information on a private Internet address is saved in the option field; an option length field for saving data on the length of the private Internet address information; a source sub-address field for saving the private Internet address information of the source; and a destination sub-address field for saving the private Internet address information of the destination. According to the MLIP and the method for transmitting/receiving the MLIP packet, addresses are expanded according to IPv4 within the private Internet without impacting on the internal router in the existing Internet. Therefore, an IPv4 router need not be replaced. All the access networks use the currently-defined private Internet addresses including one A class, 16 B classes and 255 C classes, providing peer-to-peer services between private Internet.