Abstract: A method for sharing an associated control channel in a mobile communication system is disclosed, which comprises the steps of: assigning a physical associated control channel between a mobile station and a base station and assigning a number of logical channels to the associated control channel, in order that a number of users can request communication service simultaneously through the mobile station; setting a logical link identification and a link setting flag not used when the mobile station receives a request for a new call setting, and transmitting a connection setting request to the base station through the physical associated control channel; informing the mobile station that the connecting and setting of logical link identification is completed through the physical associated control channel when the base station receives the connection request from the mobile station; and setting a traffic channel for transmitting user information after completing the connection setting.

Abstract: The present invention relates to a method for transmitting and receiving informations of control plane using MAC frame structure in order to transmit user data through associated control channel so that the radio resource formed between a mobile station and a base station can be used efficiently, in the case that the third generation mobile communication system which needs large scale control information necessarily uses out-of-band signal method for providing various services.