Patent ID: 8677012

Claim:
A method of transmitting a frame from a portable terminal to a base station in a wireless broadband Internet network, the method comprising: transmitting, to the base station, a message comprising at least one header information field included in an Internet protocol (IP) datagram and requiring a predetermined transport connection identifier (TCID), during an activation session with the base station; receiving, from the base station, the predetermined TCID included in a network header of a frame in response to the message, during the activation session with the base station; removing, at the portable terminal, the at least one header information field included in an Internet protocol (IP) datagram, after activating the session; adding, at the portable terminal, a network header that sets the predetermined TCID to the IP datagram based on the predetermined TCID received from the base station, and generating the frame; and transmitting the generated frame via the activation session to the base station; wherein the predetermined TCID is an index configured to distinguish the at least one header information field which is shared via the activation session.