Patent ID: 6738633
Filing Date: 2004-05-18
Classification: H04Q,H04W

Abstract:
A umber portability providing method of a mobile phone, comprising:a first step for transferring an enquiry message to a number portability database which supports a multi-protocol using an intelligent network protocol used in a dialing network when a mobile phone of a called subscriber connected with a gateway switch of a dialing network is a number portability service destination; a second step for recognizing the kind of an intelligent protocol of an enquiry message and calling a number portability service logic which supports a corresponding protocol in the number portability database, a third step for searching a number portability routing table based on the called number portability service, obtaining a routing information of a mobile phone of the called subscriber, processing a response message including the routing information based on the same protocol as the protocol of the dialing network and transferring to a gateway switch of the dialing network; and a fourth step in which the gateway switch of the dialing network analyzes a routing number from the routing information and at the same time forms an ISUP message for setting a call, and transfers a corresponding ISUP message to the gateway switch of the mobile phone network of the other mobile phone service provider so that the call may be transferred to the mobile phone of the called subscriber subscribed to the mobile phone network of the other mobile phone service provider.