Patent ID: 8446859

Claim:
A method of performing an uplink re-access by a User Equipment (UE) in a wireless communication system, the method comprising: performing an uplink access procedure to establish a data transmission channel; checking whether or not the data transmission channel is released by a network; and delaying uplink re-access to the data transmission channel by a wait time when the data transmission channel is released by the network, wherein the wait time is indicated by at least one specific AG (Absolute Grant) index received through an E-AGCH (Enhanced-Absolute Grant CHannel), and wherein at least one remaining AG index received through the E-AGCH indicates an AG value associated with a data rate for the data transmission channel, wherein the method further comprises: receiving mapping information representing a first relation between the wait time and the at least one specific AG index and a second relation between the AG value and the at least one remaining AG index.