A method for establishing radio bearer (RB) between a mobile terminal and a network in a wireless communication system. The mobile terminal receives RB information for a specific service from one or more cells and stores the received the RB information. If the mobile terminal is moved to one or more cells and then is moved back to the specific cell, the mobile terminal establishes an RB for the specific service according to the previously stored RB information of the specific cell rather than re-receiving the RB information.