Patent US6606491B1 successfully refreshed from Google Patents.
US6606491B1
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Subscriber validation method in cellular communication system
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1998-06-26
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Granted: 2003-08-12
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Expires: 2018-06-26
Abstract
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.
Inventors
- 👤 Richard W. Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:58
CPC Classifications
H; H04; H04W; H04W12/00; H04W12/06; H04L; H04L63/00; H04L63/08; H04L63/0853; H04W12/069; H04W8/00; H04W8/22; H04W88/00; H04W88/02; H04W88/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
64 words
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.
Claim 2
Dependent Claim
64 words
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.
Claim 3
Dependent Claim
14 words
The method of claim 1 , wherein the first network is an analog network.
Claim 4
Dependent Claim
14 words
The method of claim 2 , wherein the second network is a digital network.
Claim 5
Dependent Claim
22 words
The method of claim 3 , wherein the first network is an AMPS network and the second network is a GSM network.
Claim 6
Dependent Claim
42 words
The method of claim 1 further including the steps of: 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.
Claim 7
Dependent Claim
28 words
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.
Claim 8
Dependent Claim
89 words
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: 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.
Claim 9
Dependent Claim
59 words
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.
Claim 10
Dependent Claim
59 words
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.
Claim 11
Dependent Claim
28 words
The method of claim 8 , wherein the first ESN is stored in the mobile terminal and the second ESN and MIN are stored on the SIM card.
Claim 12
Dependent Claim
54 words
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.
Claim 13
Dependent Claim
54 words
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.
Claim 14
Dependent Claim
14 words
The system of claim 10 , wherein the first network is an analog network.
Claim 15
Dependent Claim
14 words
The system of claim 11 , wherein the second network is a digital network.
Claim 16
Dependent Claim
22 words
The system of claim 12 , wherein the first network is an AMPS network and the second network is a GSM network.
Claim 17
Dependent Claim
31 words
The system of claim 10 further including an IWF block that interfaces the first network with the second network, the IWF block having an authentication database used for the key-based authentication.
Claim 18
Dependent Claim
26 words
The system of claim 14 , wherein the IWF block performs the key-based authentication by comparing an IWF-generated authentication result with a terminal generated authentication result.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-08-11 | 2007-02-10 | 2007-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-08-11 | 2011-02-10 | 2011-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-08-11 | 2015-02-10 | 2015-08-12 | $7700.00 | Window Closed / Lapsed |