Subscriber validation method in cellular communication system
First Claim
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1. 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.
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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.
65 Citations
15 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
interfacing the first network with the second network via an interworking function (IWF) having an authentication database; and
performing the key-based authentication based on SIM-based ESN information stored in the authentication database.
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6. The method of claim 5, further including the step of performing the key-based authentication that includes comparing an IWF-generated authentication result with a terminal generated authentication result.
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7. The method of claim 1, wherein the step of performing a key-based authentication in the first network based on a SIM-based ESN comprises the steps of:
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retrieving the SIM-based ESN from a memory of the SIM card;
generating a first terminal authentication result (AUTHR) based on the SIM-based ESN;
transmitting the first AUTHR to the first network;
generating a second AUTHR at the first network based on a SIM-based ESN stored in an authentication database of an interworking function (IWF); and
matching the first AUTHR and second AUTHR.
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8. 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:
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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. - View Dependent Claims (9)
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10. A dual-mode communication system, comprising:
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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.- View Dependent Claims (11, 12, 13, 14, 15)
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Specification