Patent ID: 8254935

Claim:
A packet transferring/transmitting method for use in a mobile communication system including an upper node for transmitting a plurality of packets addressed to a mobile unit, a handover addressing node for transmitting a plurality of packets addressed to said mobile unit and a handover addressed node for transmitting a plurality of packets addressed to said mobile unit, said method comprising: a determination step in which said upper node determines implementation of handover; and a transfer/transmission step in which said handover addressing node transfers, of said plurality of packets, a non-transmitted residual packet to said handover addressed node and said upper node transmits a packet to said handover addressed node, and wherein in said transfer/transmission step, said handover addressed node converts a first header affixed in said handover addressed node into a second header to be affixed in said handover addressing node and conducts a transmission of the packet to said mobile unit; records association between the first header and the second header; converts a third header of response signals received from said mobile unit to a fourth header based on the association; and transmits the converted response signals to said handover addressing node.