Patent ID: 6643511
Filing Date: 2003-11-04
Classification: H04W

Abstract:
In a network where a gateway location register serves a first visitor location register in a first country and a second visitor location register in a second country, a method for providing regional subscription data to a serving visitor location register comprising the steps of:responsive to receiving a location update from a mobile subscriber in a network said serving visitor location register sending a MAP_UPDATE_LOCATION request message to the gateway location register: determining whether this is the first location update for the mobile subscriber in a network served by the gateway location register; determining whether this is the first location update in a new country for the mobile subscriber; and forwarding the MAP_UPDATE_LOCATION request message to, and requesting regional subscription data from a home location register associated with the mobile subscriber if the location update is not the first location update for the mobile subscriber in the network and if the location update is the first location update for the mobile subscriber in the new country, wherein the forwarded MAP_UPDATE_LOCATION request message includes a dummy mobile switching center location address to indicate the presence of the gateway location register.