CALL CANCELLATION/ACCOUNTING TRANSMISSION METHOD IN CONSIDERATION OF IDLE STATE IN INTER-WORKING FUNCTION

摘要

PURPOSE: A call cancellation/accounting transmission method in consideration of an idle state of an IWF(Inter-Working Function) is provided to include idle state information of a subscriber terminal in a call cancellation request message, and to immediately cancel a call if the subscriber terminal is not in the idle state, thereby preventing resource consumption in a memory. CONSTITUTION: An MSC(10) transmits a call cancellation message to a signal interface board(20), and requests call cancellation(S300). The signal interface board(20) requests resource cancellation of a main processor board(40)(S301). The main processor board(40) makes a data interface board(30) cancel network resources(S302), and confirms idle state information of a subscriber terminal, then checks whether the subscriber terminal is in an idle state(S303). If not, the main processor board(40) cancels subscriber resources including state information and accounting information for a call(S304), and transmits a resource cancellation response to the signal interface board(20)(S305). The signal interface board(20) includes the accounting information in the call cancellation message, and transmits the message to the MSC(10)(S306).