Patent
Preventing misuse of a copied subscriber identity in a mobile communication system
Jyrki Kortesalmi,Tapio Pelto +1 more
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TLDR
In this paper, a method and an equipment of preventing the misuse of a copied subscriber identity in a mobile communication system is proposed, where the use of a subscriber identity (IMSI) is restricted to predetermined terminals (MS), each having an associated equipment identity (IMEI) in such a way that: a number of allowable equipment identities (IMI) is defined for at least one subscriber identity, and a data base (60) linking said subscriber identities and the equipment identities allowable to them is created; the terminal (MS) sends the terminal user subscriber identity and its dedicatedAbstract:
The invention relates to a method and an equipment of preventing the misuse of a copied subscriber identity in a mobile communication system. The use of a subscriber identity (IMSI) is restricted to predetermined terminals (MS), each having an associated equipment identity (IMEI) in such a way that: a number of allowable equipment identities (IMEI) is defined for at least one subscriber identity (IMSI), and a data base (60) linking said subscriber identities (IMSI) and the equipment identities (IMSI) allowable to them is created; the terminal (MS) sends the terminal user subscriber identity (IMSI) and its dedicated equipment identity (IMEI) to the rest of the system; the rest of the system compares whether the equipment identity (IMEI) sent is allowable to the subscriber identity (IMSI) sent; as a response to the equipment identity (IMEI) sent being allowable to the subscriber identity (IMSI) sent, the use of the terminal (MS) is permitted, and otherwise the use is denied.read more
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References
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Cellular telephone anti-fraud system
TL;DR: In this paper, a transmitter identification system was proposed to determine if cellular phones in a cellular phone system are authorized as distinguished from cloned phones, operated by fraudulent users, that are unauthorized.
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TL;DR: In this article, a method for checking the access right of a subscriber equipment in a mobile communication system was proposed, where a mobile equipment is registered in a network infrastructure by transmitting the identity of the subscriber from the mobile equipment to the network infrastructure.
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TL;DR: In this article, a method of identifying and validating a cellular telephone for activation and for subsequent servicing after activation was proposed, which is based on the identification and validation of the cellular telephone.
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Communication system capable of using a plurality of subscriber identity media sharing a single subscriber identity information
TL;DR: In this paper, a plurality of subscriber identity modules implemented as cards and to be mounted to mobile stations (MSs) share a single international mobile subscriber identity (IMSI), and when any one of the MSs generates an authentication and registration request, a mobile services switching center (MSC) at home station writes information representative of the combination of the identity IMSI and an international mobile equipment identity IMEI attached to the mobile station in a home location register.