Patent ID: 8830915

Claim:
A method of performing data communication with a base station by a mobile terminal in a wireless communication system, comprising: receiving two or more channel resource assignment information from the base station; allocating channel resource based on first channel resource assignment information among the two or more channel resource assignment information; transmitting uplink data to the base station by using the allocated channel resource; receiving, from the base station, a channel resource modification indicator indicating that a channel resource for transmitting data should be modified, wherein the base station determines whether to modify the channel resource for transmitting the uplink data at the mobile terminal, based on a specific AMR (Adaptive Multi-Rate) mode for the mobile terminal among a plurality of AMR modes; changing the channel resource based on second channel resource assignment information among the two or more channel resource assignment information; and transmitting the uplink data to the base station by using the changed channel resource, wherein a talk spurt corresponding to each of the plurality of AMR modes has two or more transmission periods, wherein the channel resource modification indicator further indicates the transmission period of the talk spurt corresponding to the specific AMR mode.