Patent ID: 7327762

Claim:
A deframing method, comprising: receiving PPP frame data corresponding to a session number, storing, by a network controller, the PPP frame data in a packet memory in dependence upon the session number, and storing reassembling information corresponding to the session number, the PPP frame data being data conforming to a point-to-point protocol and being fragmented; and when said receiving has been completed, reading, by an IP frame generator, the PPP frame data from the packet memory and reassembling the read PPP frame data into one integrated piece of IP packet data, said reassembling being performed in dependence upon the reassembling information, the IP packet data being data conforming to the internet protocol, with the IP frame generator and the network controller being included in a packet data serving node (PDSN) in a mobile communication system, the mobile communication system comprising a base transceiver station, a plurality of mobile stations linked through radio channels with the base transceiver station, and a host connected with the packet data serving node through an Internet network based on an Internet protocol, the packet data serving node connected with the base transceiver station through general routing encapsulation tunneling based on the point-to-point protocol, the packet data serving node further comprising a PPP frame generator for converting the IP packet data received from the host into a plurality of pieces of PPP frame data, with the PPP frame generator and the IP frame generator being hardware modules separate from each other, the mobile communication system converting PPP frame data received from the base transceiver station into IP packet data and transferring the IP packet data to the host, the IP packet data conforming to the Internet protocol.