Patent ID: 7430182

Claim:
A system for controlling data traffic in a wireless communication system, the system comprising: a base station controller for, upon receiving specific Internet Protocol (IP) packets from a higher layer, adding thereto a modified packing sub-header (PSH) used for distinguishing between the IP packets to generate a medium access control service data unit (MAC SDU) in units of sub-blocks, grouping MAC SDUs having the same connection identifier (CID) among the modified PSH-added MAC SDUs, adding thereto a modified MAC header (MH) used for distinguishing between the groups to generate one or more tunnel messages, grouping the generated tunnel messages, generating a tunnel frame including a tunnel frame header used for distinguishing between the tunnel messages, and transmitting the generated tunnel frame; and a base station for, if a CID value of a received MAC header is a transport CID, removing an MH from a corresponding MAC packet data unit (PDU), adding thereto a modified MH, adding a base station controller control information element included in an information element used for checking its buffer status to an end of the modified MH, generating a generic routing encapsulation (GRE) packet, and transmitting the generated GRE packet through a tunnel to the base station controller.