METHOD FOR PROVIDING CALLING PARTY NUMBER SERVICE IN DUAL STACK MOBILE COMMUNICATION SYSTEM - THE METHOD COMPRISES STEPS OF JUDGING WHETHER A CALLED PARTY IS SUBSCRIBED FOR A CALLING NUMBER IDENTIFIER PRESENTATION SERVICE BY USING A DUAL STACK HLR, ADDING A CALLING NUMBER TO A MESSAGE REQUESTING INFORMATION ON THE CALLED PARTY, AND TRANSMITTING THE MESSAGE

摘要

PURPOSE: A method for providing a calling party number service in a dual stack mobile communication system is provided to provide a user with a calling party number service through an ISUP between different kinds of networks. CONSTITUTION: A 3G network subscriber or a 2/2.5G network subscriber originates a call to a 2/2.5G network or 3G network subscriber by using an MT0(Mobile Terminal), an origination request signal and a calling party number are transmitted to an origination MSC0(Mobile Switching Center)(S101). The origination MSC0 requests information on a called party from a T-HLR(Termination-Home Location Register)(S102). The T-HLR requests routing from a termination MSCT(S103). When the termination MSCT acknowledges the request(S104), the T-HLR transmits a response signal to the request for information on the called party to an origination MSC0(S105). The origination MSC0 requests the formation of a speech path from the termination MSCT and transmits a calling party number and a called party number through the speech path(S106). The termination MSCT transmits a ring signal and the calling party number(S107).