Patent ID: 7821961

Claim:
A terminal that generates and changes a transport connection identifier (CID) for supporting service differentiation in a portable Internet system, the terminal comprising: a packet detecting unit for determining a first packet that can be classified by a pre-established packet classification rule and a second packet that cannot be classified by the pre-established packet classification rule; a user input/output unit for requesting a user to input a Quality of Service (QoS) parameter for the second packet that cannot be classified, based on header information of the second packet, and for receiving the QoS of the second packet from the user; a CID managing unit for generating a new packet classification rule based on the second packet that cannot be classified, checking a CID having the same service class as that of the QoS parameter input through the user input/output unit, and determining whether to generate a new CID or to add the new packet classification rule to the checked CID depending on the checking result; and a data storing unit for storing the new packet classification rule generated by the CID managing unit and information on the CID, wherein when it is checked that a CID having the same QoS class as that of the QoS parameter input through the user input/output unit does exist, the CID managing unit performs a dynamic service change (DSC) process between the terminal and a base station to add the new packet classification rule to the checked CID, and when it is checked that a CID having the same QoS class as that of the QoS parameter input through the user input/output unit does not exist, the CID managing unit performs a dynamic service add (DSA) process to generate a new CID by combining the new packet classification rule and the QoS parameter input through the user input/output unit.