Patent ID: 7697931

Claim:
A method for performing an access procedure of a mobile communication terminal in a data communication system, the method comprising: a) receiving a command for selecting an access type selection function using an input unit; b) performing an access procedure with a network according to an established access type, wherein the access procedure comprises a plurality of data transceiving steps; c) determining whether there is a failure of each of the plurality of data transceiving steps according to satisfying a transceiving failure condition of each of the plurality of date transceiving steps if the access type selection function is performed, wherein the transceiving failure condition is determined by the mobile communication terminal; wherein the data transceiving steps include: transmitting a data channel request message to the network; receiving a first data uplink assignment message from the network in response to the data channel request message; transmitting a data information request message to the network; and receiving a second data uplink assignment message from the network in response to the data information request message; d) adjusting a counter value of an access control module according to the determined result; e) determining a magnitude of the adjusted counter value in comparison with a reference value; f) abandoning the established access type and selecting another access type according to the determined magnitude of the adjusted counter value; and g) performing an access procedure with the network identical to the network at step (b) without a network changing according to the selected another access type.