Patent ID: 6230009
Filing Date: 2001-05-08
Classification: H04W

Abstract:
In a communication system comprising a first over the air network and a second over the air network wherein a mobile station is capable of being coupled to either one of the first and second networks, a method for notifying the mobile station of a communication on one of the first and second a networks to which the station is not presently coupled, the method comprising the steps of:storing an address and a registration identifier for the mobile station camped on one of said first and second over the air networks;receiving a communication request from that one of said first and second over the air networks to which the mobile station is not presently coupled;using the stored address of the mobile station camped on one of said first and second over the air networks to send an alert via that one of said first and second over the air networks to which the mobile station is presently coupled that said communication request has been received;wherein said alert informs the mobile station that said communication request is available on said one of said first and second over the air networks to which the mobile station is not presently coupled,wherein said registration identifier indicates which of said over the air networks said mobile station is presently camped on.