Method of checking the identity of a subscriber equipment

Details Method of checking the identity of a subscriber equipment Method of checking the identity of a subscriber equipment

1995-06-01

1997-04-29

Bost, Dwayne D.

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 59, 379 60, 379 63, H04M 1100

Patent

active

056256710

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a method of checking a subscriber equipment identity in a subscriber equipment identity register of a mobile telephone exchange, which comprises an interface block, by means of which the mobile telephone exchange is connected to the subscriber equipment identity register arranged in connection with the mobile telephone exchange, which subscriber equipment identity register comprises lists containing subscriber equipment identities, which lists have list identities, in which method the mobile telephone exchange requests the subscriber for the subscriber equipment identity, the subscriber sends its equipment identity to the mobile telephone exchange, the mobile telephone exchange sends said subscriber equipment identity to the subscriber equipment identity register, the subscriber equipment identity register searches for the subscriber equipment identity corresponding to said subscriber equipment identity in the lists and sends the list identity of that list in which said subscriber equipment identity is found to the mobile telephone exchange and the mobile telephone exchange performs a predetermined function corresponding to the list identity.
The invention relates further to a mobile telephone exchange, in connection with which there is a subscriber equipment identity register, which comprises lists containing subscriber equipment identities, which lists have list identities.
It is known from mobile telephone systems that a mobile telephone subscriber has an identity, by which a subscriber equipment may be identified and from which appears the manufacturer of the subscriber equipment, for instance. Mobile telephone networks comprise a function, in which the subscriber equipment identity, which is in a GSM system the International Mobile Equipment Identity IMEI of the subscriber, is checked by asking the subscriber for its equipment identity. The checking is made, for example, because of a desire of ensuring that it is permitted to use this subscriber equipment in the network or, in other words, that the subscriber equipment is not stolen or marked faulty, which means that using it does not cause any interference in the network. A detailed composition of a subscriber equipment identity according to a GSM system is presented in standard GSM 03.03, Numbering, Addressing and Identification, Version 3.5.0, January 1991, ETSI. The subscriber may be requested for the subscriber equipment identity, for instance, typically each time when the subscriber equipment has established a connection with the mobile telephone exchange. One procedure for requesting for a subscriber equipment identity is set forth in GSM standard 09.02, Mobile Application Part Specification, Version 3.8.0, January 1991, ETSI, Paragraph 5.9.1, FIG. 5.9.1. The same paragraph of the same publication also presents how the subscriber equipment identity is subsequently sent to an Equipment Identity Register EIR, the connection of which to the mobile telephone exchange over an interface F is described in Paragraph 5.1 of the same standard, especially in FIG. 5.1.1.
The Equipment Identity Register EIR or some other location in the mobile telephone network comprises lists, e.g., according to the standard GSM 02.16, International MS Equipment Identities, Version 3.0.1, 1992, ETSI, which lists contain subscriber equipment identities or series of subscriber equipment identities and have list identities. The list identities used in the standard are composed of colours, which naturally indicate numerical identities, for instance. White color or identity is the identity of a list composed of all number series containing the equipment identities allocated by operators using the same mobile telephone system, here a GSM system, to the subscriber equipments permitted to be used in the networks. These number series are presented by informing beginning and end numbers of the series only, i.e. not by listing identities of individual subscriber equipments. A list marked with black color, i.e. black list identity,

REFERENCES:
patent: 5329573 (1994-07-01), Chang et al.
patent: 5396543 (1995-03-01), Beeson
FITCE Journal (belgium), No. 4, Oct.-Dec. 1991, pp. 33-36, M Loix, "The Equipment Identity Register (EIR)"; see p. 33, column l, lines 1-16; p. 34, column 1, line 9-colun 2, line 42; p. 35, column 2, line 15-page 36, column 1, line 13; see especially p. 35, column 2, lines 28-33.
Recommendation GSM 02.16 ("International MS Equipment Identities"), version 3.0.1., 1992 ETSI; see chapter 4, Administrative Use of IMEI (pp. 3-4).
CME 20 System Training Document, Ericsson Radio Systems AB, 1991; see chapter 10 ("Switching system -- HLR/AUC, security aspects"), pp. 10:20-10:21 (Equipment identification).
Electrical Communication (France), No. 2, 1993 (2nd. Quarter), pp. 141-154-, M. Feldmann et al., "GSM Network Systems and Overall System Integration" see p. 142, column 1, line 17-- column 2, line 17; p. 151, column 3, line 6-page 152, column 1, line 22.
Recommendation GSM 09.02, version 3.8.0, pp. 16, 17.

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