Patent ID: 6370379
Filing Date: 2002-04-09
Classification: H04W

Abstract:
A method for transferring information related to a mobile subscriber which is moving within a cellular telecommunication system, wherein the system includes a first switching centre and a second switching centre, the first and second switching centres are connected to each other and to a home location register, the first and second switching centres each handle base stations having radio covering areas, the areas of the base stations of the first switching centre forming a first location area and the areas of the base stations of the second switching centre forming the second location area, whereby authentication data and subscriber data related to the mobile subscriber is permanently stored in the home location register and temporarily stored in the first switching centre in whose location area the mobile subscriber is present, said method comprising the steps of:crossing, by the mobile subscriber, a boundary between the first location area and the second location area; sending a location update request message, from the mobile subscriber to the second switching centre; transferring the temporarily stored authentication data from the first switching centre to the second switching centre; storing the authentication data in the second switching centre; transferring data required to authenticate the mobile subscriber from the mobile subscriber to the second switching centre; authorising the mobile subscriber as a visitor in the second switching centre; transferring the temporarily stored subscriber data from the first switching centre to the second switching centre; sending a location information message from the second switching centre to the home location register; storing in the home location register the new location of the mobile subscriber; sending a location information confirm message from the home location register to the second switching centre; and sending a location update confirm message from the second switching centre to the mobile subscriber.