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WO1998027771A1 - Procede et agencement pour mobilite reduite - Google Patents

Procede et agencement pour mobilite reduite Download PDF

Info

Publication number
WO1998027771A1
WO1998027771A1 PCT/SE1997/002082 SE9702082W WO9827771A1 WO 1998027771 A1 WO1998027771 A1 WO 1998027771A1 SE 9702082 W SE9702082 W SE 9702082W WO 9827771 A1 WO9827771 A1 WO 9827771A1
Authority
WO
WIPO (PCT)
Prior art keywords
portable
access right
ppl
domain
portable part
Prior art date
Application number
PCT/SE1997/002082
Other languages
English (en)
Inventor
David Quinlan
Lucas Persson
Subhankar Ray
Eric Thrierr
Original Assignee
Telefonaktiebolaget Lm Ericsson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson filed Critical Telefonaktiebolaget Lm Ericsson
Priority to AU53517/98A priority Critical patent/AU5351798A/en
Publication of WO1998027771A1 publication Critical patent/WO1998027771A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H04M1/72502—Cordless telephones with one base station connected to a single line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/663—Preventing unauthorised calls to a telephone set
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/667—Preventing unauthorised calls from a telephone set
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/667—Preventing unauthorised calls from a telephone set
    • H04M1/67—Preventing unauthorised calls from a telephone set by electronic means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/08—Details of telephonic subscriber devices home cordless telephone systems using the DECT standard

Definitions

  • the present invention relates to a method and an arrangement for restricting the mobility of a subscriber in a cordless telecommunications system, which comprises fixed parts, each associated with access right identities, and at least one portable part having a portable access right key and an international portable user identity, particularly in a DECT
  • PARK Bit Access Eights Key
  • IPUI International Eortable User identity
  • the IPUI is used to identify the portable part within its validity domain. It can be locally unique with a validity domain restricted to one or more fixed parts, e.g. within a PABX
  • the domain restrictions are defined by the PARK, i.e. a portable part is allowed to access a fixed part only if it can identify one of that fixed part's identities, which are known as ARI's (Access Eight Identities).
  • the PARK may identify a group of ARI's as it is specified as PARK ⁇ n ⁇ , where n is the value of the PARK length indicator given in the subscription process of the portable part. The identification is performed using the first n bits of the ARI's. If the length of the PARK and the ARI is m bits the maximum number of fixed parts a portable part with a PARK ⁇ n ⁇ can have access to is equal to 2 m_n .
  • m is equal to 36 bits for access right class A and 31 bits for access right classes B-D.
  • a low number of the PARK length indicator would in particular be useful in a public environment, such as a DECT-based PSTN/CTM network .
  • a subscriber may be able to manipulate the PARK and the PARK length indicator of his portable part and consequently roam into domains of radio fixed parts where he does not have access to.
  • the standard DECT examination will not detect this manipulation .
  • the object of the invention is to get a safer restriction system in a cordless telecommunications system, in particular in a DECT based PSTN/CTM network, which will detect a fraud as described above .
  • the information of the access right domain for each IPUI is preferably stored in a location data base in the network's local exchange, but it may also be stored in an external data base.
  • the access right domain may be defined either as the domain of one or several fixed parts or as the domain of one or several location areas.
  • the checking may be performed at a handover, at a location update or during the setup of an originating call .
  • Two access right domains for the portable part are defined in one preferred embodiment of the invention; one that is to be used at checking in case of a location update, which always take part when activating the portable part, and the other to be used in case of an originating call, the latter access right domain preferably being a subset of the former.
  • Possibilities to restrict the portable part from initiating originating calls to particular portable parts, such as portable parts temporarily or permanently being located within a certain domain may likewise be included in the invention.
  • the method and arrangement according to the invention give rise to a safer restriction system, which easily detects manipulations of the PARK length indicator.
  • An advantage of the invention is that it is simple and straightforward to implement.
  • a further advantage of the invention is that the access right domain may be stored in the local exchange, and thus eliminating the risk for somebody to manipulate the portable part .
  • Yet another advantage is that two access right domains may be specified; one general and one intended particularly for originating calls.
  • Fig. 1 shows schematically a PARK, an IPUI and a radio fixed part identity illustrating restricted subscriber mobility according to prior art .
  • Fig. 2 shows a DECT based PSTN/CTM network with restricted subscriber mobility according to the present invention.
  • Fig. 3 shows a location data base according to a first embodiment of the present invention.
  • Fig. 4 shows a location data base according to a second embodiment of the present invention.
  • £art identity which is the corresponding identity in the fixed constituent of the DECT network. It comprises e.g. an ARI, called primary ARI or PARI, which identifies a fixed part, and a radio fixed part number RPN, which identifies an individual radio fixed part.
  • the RFPI comprises also a one-bit E field, which indicates if there are any secondary access right identities available.
  • fig. 1 is further shown the structure of an IPUI, which comprises a portable user type PUT and a portable user number PUN.
  • the PARK can be written as PARK ⁇ n ⁇ , where n is the value of the PARK level indicator.
  • n is the value of the PARK level indicator.
  • the IPUI of a subscriber is linked to the domains the subscriber has access right to according to his subscription and used for deciding whether a call or a call attempt should be accepted or rejected.
  • a DECT network according to the invention. It comprises several fixed parts FP1, FP2 , FP3 , FP4 ; each of them belonging to a different location area LAI, LA2 , LA3 , LA4.
  • a portable part PPl is activated in one of location areas LA4.
  • an access right domain e.g. LAI, LA2, LA3
  • a location data base LDB as shown in fig. 4.
  • the access right domain is defined as a group of fixed parts, which are represented in terms of their RFPI's, e.g. RFPIl, RFPI2, RFPI3 , as shown in fig. 3.
  • RFPI radio frequency
  • RFPI2 radio frequency identifier
  • RFPI3 RFPI3
  • the location data base LDB is preferably stored in a local exchange LE of the DECT network. It may also be part of a home data base HDB of the network, which then is copied to a visitors data base VDB in the local exchange where the subscriber is located.
  • the international portable user identity IPUIl of the portable part PPl is analyzed to determine whether the portable part PPl has access right to the domain where it is located, e.g. LA4. All calls or call attempts are rejected in case the portable part PPl does not have access right to that domain LA4, which is the case in the example of fig. 2. Some calls, e.g. emergency calls and calls to the service provider, may be accepted even though the check fails.
  • the predetermined activity which initiates the analyzing of the access rights may be a location update or a handover.
  • a check is initiated when doing an external handover, i.e. when moving from one fixed part to another.
  • This latter check makes, however, sense only if the access right of a subscriber covers only a subset of the domain of a fixed part, i.e. that the PARK level indicator of the subscriber is larger than the PARI .
  • the analyzing may take place at the setup of originating calls for subscribers that have not done a location update, that is, are not registered.
  • a first access right domain is to be used for analyzing in case of a location update, which always take part when activating the portable part, or a handover.
  • a second access right is to be used in case of an originating call.
  • the latter access right domain is preferably a subset of the former, e.g. covering only a subset of the domain of a fixed part .
  • a black list has to be defined for each portable part PPl that is to be restricted, in which all types of forbidden originating calls are stated.
  • a white list specifying allowed originating calls is used. For example, whole routing number areas or telephone numbers of individual portable parts may be specified in the white list, which preferably is stored together with other subscriber data associated with the portable part PPl in a home data base HDB of the network. The white list has then to be copied to the local exchange of the coverage area in which the portable part PPl temporarily or permanently is located.
  • IPUIl of the portable part PPl is linked to the white list.
  • IPUIl of the portable part PPl is analyzed and by referring to the corresponding white list it may be determined whether the portable part PPl has right to perform the call. If it does not have that right the call is rejected.
  • the present invention is valid for all portable user types PUT, such as N, S, 0, T, P, Q and R.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un agencement permettant de limiter la mobilité d'un abonné d'un système de télécommunications radio qui se compose d'éléments fixes (FP1, FP2, FP3, FP4) tous affectés d'identités de droits d'accès (ARI), qui se compose ensuite d'au moins un élément portable (PP1) doté d'une clé de droits d'accès de portable (PARK1), et qui se compose enfin d'une identité internationale d'utilisateur de portable (IPUI1) en particulier dans un réseau CTM (Cordless Terminal Mobility) de type DECT. L'invention consiste à définir pour l'élément portable (PP1) un premier domaine de droits d'accès (LA1, LA2, LA3), à créer le lien logique entre d'une part l'identité internationale d'utilisateur de portable (IPUI1) de l'élément portable (PP1) et d'autre part le premier domaine de droits d'accès (LA1, LA2, LA3), à analyser l'identité internationale d'utilisateur de portable (IPUI1) de l'élément portable (PP1) de façon à déterminer si l'élément portable (PP1) est titulaire de droits d'accès pour le domaine dans lequel il se trouve (LA4), et à refuser tout appel ou toute tentative d'appel dans le cas où il n'est titulaire d'aucun droit d'accès au domaine considéré (LA4).
PCT/SE1997/002082 1996-12-17 1997-12-12 Procede et agencement pour mobilite reduite WO1998027771A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU53517/98A AU5351798A (en) 1996-12-17 1997-12-12 Method and arrangement for restricted mobility

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9604642-0 1996-12-17
SE9604642A SE512101C2 (sv) 1996-12-17 1996-12-17 Metod och anordning för begränsning av rörlighet i ett trådlöst telekommunikationssystem

Publications (1)

Publication Number Publication Date
WO1998027771A1 true WO1998027771A1 (fr) 1998-06-25

Family

ID=20405011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1997/002082 WO1998027771A1 (fr) 1996-12-17 1997-12-12 Procede et agencement pour mobilite reduite

Country Status (3)

Country Link
AU (1) AU5351798A (fr)
SE (1) SE512101C2 (fr)
WO (1) WO1998027771A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0944272A1 (fr) * 1998-03-18 1999-09-22 Alcatel Central de télécommunication avec plusieurs stations de base radio

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505106A2 (fr) * 1991-03-22 1992-09-23 Vodafone Limited Fractionnement de service dans les réseaux de télécommunications cellulaires et méthodes y afférant
WO1994013115A1 (fr) * 1992-12-01 1994-06-09 Nokia Telecommunications Oy Procede pour verifier l'identitie d'un equipement d'abonne
EP0641137A2 (fr) * 1993-08-27 1995-03-01 Siemens Aktiengesellschaft Méthode et dispositif de restriction d'accès à un système radio mobile
EP0685972A2 (fr) * 1994-05-31 1995-12-06 Nokia Mobile Phones Ltd. Système de communication mobile et procédé pour sa mise en oeuvre
WO1996034500A1 (fr) * 1995-04-28 1996-10-31 Telefonaktiebolaget Lm Ericsson (Publ) Systeme et procede de limitation de la mobilite d'abonnes affectes a des zones d'abonnement fixe dans un reseau de telecommunications cellulaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0505106A2 (fr) * 1991-03-22 1992-09-23 Vodafone Limited Fractionnement de service dans les réseaux de télécommunications cellulaires et méthodes y afférant
WO1994013115A1 (fr) * 1992-12-01 1994-06-09 Nokia Telecommunications Oy Procede pour verifier l'identitie d'un equipement d'abonne
EP0641137A2 (fr) * 1993-08-27 1995-03-01 Siemens Aktiengesellschaft Méthode et dispositif de restriction d'accès à un système radio mobile
EP0685972A2 (fr) * 1994-05-31 1995-12-06 Nokia Mobile Phones Ltd. Système de communication mobile et procédé pour sa mise en oeuvre
WO1996034500A1 (fr) * 1995-04-28 1996-10-31 Telefonaktiebolaget Lm Ericsson (Publ) Systeme et procede de limitation de la mobilite d'abonnes affectes a des zones d'abonnement fixe dans un reseau de telecommunications cellulaire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0944272A1 (fr) * 1998-03-18 1999-09-22 Alcatel Central de télécommunication avec plusieurs stations de base radio

Also Published As

Publication number Publication date
AU5351798A (en) 1998-07-15
SE9604642L (sv) 1998-06-18
SE9604642D0 (sv) 1996-12-17
SE512101C2 (sv) 2000-01-24

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