Patent ID: 8355322

Claim:
A data communication system having a radio base station connected to a network and a mobile station that establishes a communication channel with said network through said radio base station and performs data communication with said radio base station over a radio channel, wherein said mobile station includes: data type informing unit that transmits a communication channel establishment request signal that contains information that denotes that the data is not instantaneous data to said radio base station if said mobile station transmits data that is not instantaneous data, wherein said radio base station includes: radio resource management unit that determines whether or not a radio resource has free space equal to or greater than a threshold; and call control unit that transmits a communication channel establishment rejection signal that contains information that denotes that a delay transmission that transmits the data later is to be executed to said mobile station and registers an identifier of the mobile station to a list if said communication channel establishment request signal contains the information that denotes that the data is not instantaneous data and the radio resource does not have free space equal to or greater than said threshold, and that transmits a call signal that contains information that denotes that execution of said delay transmission is to be started to a mobile station whose identifier has been registered to said list if the radio resource has free space equal to or greater than said threshold, and wherein said mobile station further includes: delay transmission unit that transmits said communication channel establishment request signal to said radio base station again and starts transmitting data that is not instantaneous data if said call signal contains the information that denotes that the execution of said delay transmission is to be started.