Subscriber validation method in cellular communication system
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorRichard W. Peck
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Abstract
A dual-mode communication system made up of an AMPS network and a GSM network provides for communication to and from dual-mode terminals equipped with corresponding SIM cards. The mobile terminals store a terminal-based ESN, and the SIM cards store a SIM-based ESN and MIN. The dual-mode system uses the terminal-based ESN and MIN for registration in the AMPS network. For authentication purposes, however, the dual-mode system uses the SIM-based ESN for key-based authentication in the AMPS network.
Claims15
In a dual-mode communication system having a first network and a second network serving at least one dual-mode terminal equipped with a Subscriber Information Module (SIM) card, a subscriber validation method comprising the steps of:
- performing a registration process in the first network using a terminal-based Electronic Serial Number (ESN);
- and
- performing a key-based authentication in the first network based on a SIM-based ESN.
In an analog communication system having at least one mobile terminal equipped with a Subscriber Information Module (SIM) card, a validation method comprising the steps of:
- transmitting a Mobile Identification Number (MIN);
- transmitting from the mobile terminal a first Electronic Serial Number (ESN);
- and
- transmitting an authentication result, wherein said authentication result is derived based on a second ESN.
A dual-mode communication system, comprising:
- a first network;
- a second network;
- at least one dual-mode terminal, including a Subscriber Information Module (SIM) card, a transmitter for transmitting a terminal-based Electronic Serial Number (ESN) for registration in the first network using;
- and transmitting a SIM-based ESN for performing a key-based authentication in the first network.
Dependencies are inferred from the claim text.