Method for the location registration of a mobile terminal

• US 6,236,859 B1
• Filed: 03/15/1999
• Issued: 05/22/2001
• Est. Priority Date: 10/23/1996
• Status: Expired due to Term

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Morper, Hans-Jochen
• Primary Examiner(s): Trost, William G.
• Assistant Examiner(s): Milord, Marceau
• Application Number:
  US09/254,694
• Time in Patent Office: 799 Days
• Field of Search: 455/433, 455/435, 455/432, 455/456
• US Class Current: 455/435.1
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 8/245 from a network towards a terminal

Abstract

A method for the location-dependent registration of a mobile terminal (KE1, KE2) via an air interface at a base station (BS) of a communication network (KN). The base station (BS) broadcasts a radio fixed part identity (RFPI) with primary access rights identity (PARI) as a layer-2-message with a first periodicity and a secondary access rights identity (SARI) as a layer-2 message with a second periodicity. At least a certain part of the primary access rights identity (PARI) and, respectively, of the secondary access rights identity (SARI) is compared in the terminal (KE1, KE2) with at least a part of subscription data (PARK) stored in the terminal. The terminal (KE1, KE2) registers at the base station (BS) as a home terminal in the case of a positive result of the comparison of a primary access rights identity (PARI) and registers at the base station (BS) as a visiting terminal in the case of a positive result of the comparison of a secondary access rights identity (SARI). After a change of the primary access rights identity (PARI) broadcast by the base station (BS), this base station (BS) broadcasts as a secondary access rights identity (SARI) the primary access rights identity (PARI) broadcast by it before the change.

Claims

1. A method for location registration of a mobile terminal via an air interface at a base station of a communication network, comprising the steps of:

broadcasting via the base station a radio fixed part identity with primary access rights identity as a layer-2 message with a first periodicity and a secondary access rights identity as a layer-2 message with a second periodicity;

comparing at least a predetermined part of the primary access rights identity and, respectively, of the secondary access rights identity in the terminal with at least a part of subscription data stored in the terminal;

registering the terminal at the base station as a home terminal for a positive result of the comparison of a primary access rights identity and registering the terminal at the base station as a visiting terminal for a positive result of the comparison of a secondary access rights identity;

broadcasting, after a change of the primary access rights identity broadcast by the base station, primary access rights identity broadcast by the base station before the change as a secondary access rights identity.

2. The method as claimed in claim 1, wherein, after the change of primary access rights identity broadcast by a base station, terminals which are reachable in the communication network are caused to change subscription data respectively stored therein using an updating procedure, such that a respective terminal of said terminals can register as a home terminal at a base station which broadcasts the changed primary access rights identity and wherein when a respective terminal registers as a visiting terminal at a base station, a check within the communication network to determine if said respective terminal is a home terminal without updated subscription data in order then to update the subscription data of said respective terminal using the updating procedure.

3. The method as claimed in claim 2, wherein, after each updating procedure, the communication network is checked to determine if all terminals to be updated have been subjected to an updating procedure and wherein, for a positive result of the check, the broadcasting as a secondary access rights identity of the primary access rights identity broadcast before the change is ended.