Method and arrangement for managing a service in a mobile communications system
July 15, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod for updating encryption key information in communication units Fraud prevention system and process for cellular mobile telephone networks Variable security level encryption Method for controlling an accessory of a subscriber terminal equipment and an accessory of a subscriber terminal equipment Channel resource management within a digital mobile communications network Broadcast channel seizure with allocated single traffic channel per occupied cell in a cellular system Prevention of alteration of location information for mobile-based location calculation Method for user identity protection Mobility management for terminals with multiple subscriptions Patent #: 6556820 InventorAssigneeApplicationNo. 09/354187 filed on 07/15/1999US Classes:380/247, CELLULAR TELEPHONE CRYPTOGRAPHIC AUTHENTICATION380/258, Position dependent or authenticating380/270, Wireless communication380/273Rekeying systemExaminersPrimary: Sheikh, Ayaz R.Assistant: Baum, Ronald Attorney, Agent or FirmInternational ClassesG01S 5/00 (20060101)G01S 5/10 (20060101) H04Q 7/38 (20060101) G01S 5/14 (20060101) H04Q 7/32 (20060101) Foreign Application Priority Data1998-07-17 FIAbstractThe invention pertains to a method and arrangement for managing a service in a mobile communications system, mobile station and an intelligent module in a mobile station. An idea of the invention is that the data needed in the mobile station for a mobile communications service are transferred in encrypted form to several mobile stations at a time. The encryption is based on a key which is transferred individually to mobile stations. Applied to mobile station location this means that the location of a mobile station is determined in the mobile station by means of the timing difference of the signals received from at least two (preferably at least three) base stations and on the basis of the location data of said base stations. The location data are transferred to the mobile station in encrypted form so that they can be utilized only by mobile stations to which the operator has delivered a decryption key needed to decrypt the location data. The decryption key is transferred preferably individually to each mobile station. Decryption may occur in an intelligent module of a mobile station, in which case no location data appear in a non-encrypted form outside the intelligent module, resulting in data confidentiality. If chargeability is the only requirement, decryption and location calculation may also take place elsewhere in the mobile station. The decryption key can be changed, in which case the new decryption key is transferred to the mobile station advantageously periodically in conjunction with the location update procedure.Other References
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