WO1998027781A2 - Selective carrier denial for mobile subscribers - Google Patents
Selective carrier denial for mobile subscribers Download PDFInfo
- Publication number
- WO1998027781A2 WO1998027781A2 PCT/US1997/022609 US9722609W WO9827781A2 WO 1998027781 A2 WO1998027781 A2 WO 1998027781A2 US 9722609 W US9722609 W US 9722609W WO 9827781 A2 WO9827781 A2 WO 9827781A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- carrier
- indicator
- mobile subscriber
- location register
- restriction
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
Definitions
- the present invention relates generally to a telecommunications system and method incorporating selective carrier denial, particularly, to a telecommunications system and method for selective carrier denial in a wireless environment, and, more particularly, to a system and method for selective carrier denial in a mobile cellular environment.
- SCD Selective Carrier Denial
- AT&T a feature that provides the capability for a telephone service provider at the request of a carrier, such as AT&T, to block subscriber access to toll calling on that carrier, but without restricting such subscribers from making local, non-toll calls or calls using other carriers.
- SCD allows the wireline provider to selectively inhibit certain carrier-handled calls from those subscribers who have been designated as non-paying subscribers, but allow them to make local and emergency calls without restriction.
- FCC Federal Communications Commission
- a telecommunications system and method for selective carrier denial provides an operator of a Public Land Mobile Network (PLMN) the ability to restrict or inhibit certain carrier-handled calls from a given cellular subscriber, while simultaneously allowing other cellular calls.
- PLMN Public Land Mobile Network
- a restriction flag is included in a Visitor Location Register (VLR) record for each cellular user.
- VLR Visitor Location Register
- HLR Home Location Register
- selective carrier denial is applied to intelligent network systems and methods.
- selective carrier denial is applied within a subscriber's mobile phone without involving the HLR directly.
- FIGURE 1 is a block diagram of a telecommunications system according to a first and second embodiments of the present invention
- FIGURE 2 is a block diagram of a portion of the telecommunications system shown in FIGURE 1, illustrating the steps for setting a carrier restriction flag in the Mobile Services Switching Center (MSC) ;
- MSC Mobile Services Switching Center
- FIGURE 3 is a block diagram of a portion of the telecommunication system shown in FIGURE 1, illustrating the steps for selective carrier denial;
- FIGURE 4 is a block diagram of a third embodiment of the present invention.
- FIGURE 5 is a block diagram of a fourth embodiment of the present invention.
- FIGURE 6 is a block diagram of an alternate embodiment of the present invention.
- a Public Land Mobile Network such as cellular network 10, which in turn is composed of a plurality of areas 12, each with a Mobile Switching Center (MSC) 14 and an integrated Visitor Location Register (VLR) 16 therein.
- Each Location Area 12 is divided into a number of cells 22.
- Mobile Station 20 is the physical equipment, e.g..
- a Base Station (BS) 24 is the physical equipment, illustrated for simplicity as a radio tower, that provides radio coverage to the geographical area of the cell 22 in which to handle radio traffic to and from the MS 20.
- the PLMN Service Area or cellular network 10 includes a Home Location Register (HLR) 26, which is a database maintaining all subscriber information, e.g.. user profiles, current location and routing information, International Mobile Subscriber Identity (IMSI) numbers, and other administrative information.
- HLR Home Location Register
- the HLR 26 may be co-located with a given MSC 14, an integral part of the MSC 14 or service multiple MSCs 14, the latter of which is illustrated in FIGURE 1.
- IMSI is a unique 15-digit identification number assigned to each mobile station 20, and includes a Mobile Country Code (MCC) of three digits, a Mobile Network Code (MNC) of two (or three) digits, and a Mobile Subscriber Identification Number (MSIN) , the latter two constituting a National Mobile Subscriber Identity (NMSI) number.
- MCC Mobile Country Code
- MNC Mobile Network Code
- MSIN Mobile Subscriber Identification Number
- the VLR 16 is a database containing information about all of the mobile stations 20 currently located within the MSC/VLR area 12. If a mobile station 20 roams into a new MSC/VLR area 12, the VLR 16 connected to that MSC 14 will request data about that mobile station 20 from the HLR database 26 (simultaneously informing the HLR 26 about the current location of the mobile station 20) .
- the local VLR 16 will have the requisite identification information without having to reinterrogate the HLR 26.
- the VLR and HLR databases 16 and 26, respectively contain various subscriber information associated with a given mobile station 20.
- additional information for each subscriber is stored in these databases, particularly, carrier restriction information.
- the carrier restriction information is forwarded to the subscriber's radiotelephone, e.g., mobile station 20, where it is stored.
- FIGURE 2 there is shown a portion of the overall network 10 in FIGURE 1 and a series of numbers representing a corresponding number of steps, as will be described hereinafter.
- the mobile station 20 upon powering up, initiates a registration message to the appropriate MSC/VLR (shown as an integrated device 17 in FIGURE 2) in the MSC/VLR area 12 and registers the requisite information therein (step 1 as illustrated) .
- the MSC/VLR 17 then signals the HLR 26 requesting the subscriber data associated with the particular registering device 20 (step 2) .
- the HLR database 26 includes a plurality of data records 26A of carrier restriction information on each subscriber, and forwards to the VLR 16 in device 17 (step 3) an instruction to set a restriction flag record 16A in the VLR database 16 if the particular subscriber has any applicable carrier restrictions. For example, if the subscriber has not paid their phone bill for a given carrier (and is deemed a non-paying subscriber by that carrier) the restriction flag 16A associated with that subscriber is set and the MSC/VLR 17 receives an affirmative indication from the HLR 26 that a restriction applies. The subscriber data, along with the set restriction flag 16A for that subscriber, is then stored within the VLR 16 for later use. After the MS 20 has registered in the local MSC/VLR
- FIGURE 3 there is shown the network portion as in FIGURE 2 but with a communications link 28 to other systems, e.g., other MSC/VLR areas 12 within the PLMN or other PLMNs, a Public Switched Telephone Network (PSTN) , an Integrated Services Digital Network (ISDN) or other wireline or wireless systems.
- PSTN Public Switched Telephone Network
- ISDN Integrated Services Digital Network
- the MSC/VLR 17 determines whether or not a long distance, toll or carrier access call is requested (step 2) . If the call is local or if the restriction flag 16A for that subscriber is not set, then the call goes out to the proper destination either within the PLMN 10 or across link 28 (step 6, as illustrated in FIGURE 3) . If, however, the call is a carrier access or toll call, i.e.. restrictions could apply to this particular call or type of call, and the restriction flag 16A is set, then more information is needed to ascertain whether this particular call by this particular subscriber is allowed.
- the MSC/VLR 17 signals the HLR 26 (step 3) , forwarding the pertinent carrier identification information, e.g. , for AT&T the number 288 representing their carrier code, to the HLR 26.
- a carrier restriction function also stored within the HLR 26, compares the carrier identification information forwarded by the MSC/VLR 17 with a list of restricted carriers for that subscriber (step 4) stored in the data record 26A for that subscriber. If the chosen cellular carrier can be used, i.e.. the carrier identification does not match any of the stored restricted carriers or carrier types, then the HLR 26 signals the MSC/VLR 17 (step 5), which then completes the call, e.g., across link 28 (step 6) .
- the HLR 26 signals (step 5) the MSC/VLR 17 accordingly, which then rejects the call and sends the reason therefor back to the mobile station 20 (step 7) which displays an invalid carrier selection message to the subscriber.
- the HLR 26 will also disallow or reject a definition of a call-forwarding number that uses a restricted carrier.
- a Service Order Gateway (SOG) 32 connecting the HLR 26 with a Customer Administration System (CAS) 34, through which a network administrator may modify the HLR database 26, on a subscriber basis, to reflect changes in the subscribers' status. For example, if a given subscriber becomes a non-paying subscriber for one or more carriers, then a list of those non-allowed carriers is entered by the network administrator through the CAS 34 and SOG 32 and stored within the subscriber data records 26A of HLR database 26.
- restriction flag 16A in the first embodiment of the present invention is preferably a generic flag, i.e..
- the flag 16A in MSC/VLR 17 only indicates that a generic carrier restriction has been placed on that subscriber, not a particular restriction.
- the particular restriction information is, as described, stored within the respective data record 26A of the HLR 26 for that subscriber. It should nonetheless be understood that a multiplicity of discrete restriction flags 16A may be available for each subscriber which indicate a corresponding multiplicity of particular restrictions.
- flag l ⁇ A in VLR 16 may indicate an AT&T restriction
- flag 16A ⁇ may indicate the allowance or restriction of types of carrier-access calls, described in more detail hereinafter.
- the HLR 26 may forward a list of carrier restrictions about a particular subscriber for storage within the appropriate VLR 16. For example, a multibit or multiword flag or data record representing the particular carrier restrictions or carrier restriction types may be downloaded to the VLR 16, which could then perform the appropriate comparison, i.e.. the aforementioned carrier restriction function, at that point without involving the HLR 26. Alternatively, where the number of carriers is excessive, a partial list may be downloaded, preferably the most likely candidates to be accessed. In either event, complete, partial or particular updates to the VLR 16 are periodically necessary to maintain accurate subscriber restriction information. It should further be understood that the above embodiments of the present invention may be adapted for related usages, e.g.
- an intelligent network such as a freephone service, i.e.. a service whereby a company has a universal number to which all incoming calls to that company are charged.
- an intelligent network such as a freephone service, i.e.. a service whereby a company has a universal number to which all incoming calls to that company are charged.
- the call is automatically routed to the nearest or most appropriate office of the company, e.g., a central office open around the clock or a regional office open on weekdays during normal hours.
- Selective Carrier Denial may be employed in the manners described in the present application to restrict a caller's access to the universal number, thereby avoiding a charge to that number by an ineligible dialer.
- FIGURE 4 Shown in FIGURE 4 is a third embodiment of the present invention directed to incorporating SCD capability into an IN cell, as described above.
- the call is then routed to the nearest Service Switching Point (SSP) 36, which has conventional Service Switching Functions (SSF) therein, such as set forth in triggering tables.
- SSP 36 communicates with a Service Control Point (SCP) 38, which contains Service Control Functions therein, which include the requisite routing and determination functions for SCD, such as those incorporated into the data records 26A of the HLR 26 in the first embodiment.
- SCP Service Control Point
- the carrier identification is then forwarded to the SCP 38, which analyzes the carrier identification and determines if there are any restrictions. If none, the call goes through. If restrictions apply, a message is forwarded back to the MSC/VLR 17 that the call has been denied.
- FIGURE 5 Shown in FIGURE 5 is a fourth embodiment of the present invention directed to incorporating carrier restriction capability into a database 20A within the mobile station 20.
- Database 20A which may reside, for example, in a conventional Subscriber Identity Module
- SIM Card may include therein a carrier restriction flag, which if set indicates that more particular carrier restriction information is required, as described.
- a multiplicity of flags representing a corresponding multiplicity of carrier restrictions or a carrier restriction list may be downloaded, from the HLR 26 database through the respective MSC 14, to the mobile station 20 for storage within database 20A.
- the carrier restriction function may be performed within the mobile station 20 itself without using any over-the-air resources of the PLMN 10. For example, if the database 20A indicates that a carrier restriction applies and the subscriber dials an initial "10", i.e., an attempt to place a toll call, then the attempt is terminated at the mobile station 20 without involving the network.
- the method and system of the present invention is also useful where different protocols come into contact, e.g., PCS 1900 and GSM.
- the MSC/VLR 17 in one system e.g.. the PCS 1900 in the United States
- contacts the HLR 26 of another e.g. , the GSM of Europe
- selective carrier denial information is exchanged.
- the aforedescribed embodiments provide selective carrier denial capability to a telecommunications system, selectively denying carrier access on a case-by-case basis in accordance with the restriction flag records 26A, 16A or 20A stored in the HLR 26, the VLR 16 or MS 20, respectively.
- a mobile subscriber in the PLMN 10 system may subscribe to a Presubscribed inter-Local Access Transport Area (InterLATA) Carrier (PIC) in that system.
- InterLATA Inter-Local Access Transport Area
- PIC Presubscribed inter-Local Access Transport Area
- This carrier information is then placed by the network administrator within the appropriate record 26A of the HLR 26, also referred to as the subscriber profile data.
- the mobile subscriber represented by mobile station 20 in the figures, has the option to override their own PIC, i.e., the assigned carrier, on a per call basis by dialing a Carrier Access Code (CAC) in front of the B-number.
- PIC Carrier Access Code
- cellular phone rental companies may require the user to use only the designated carrier (PIC) on their phones and bar the user from making CAC calls.
- the MSC 14/VLR 16 servicing that mobile subscriber has the capability to use a default carrier in the event a particular PIC or CAC is not defined for that MSC 14/VLR 16 and substitution with the default carrier is allowed. In this manner, the subscriber of the mobile station 20 can make both interLATA, intraLATA and other toll calls without any restrictions.
- a Gateway MSC (GMSC) 40, servicing calls to the mobile subscriber, as shown in FIGURE 6, may also use a default carrier where a particular PIC or CAC is not provided. In this manner, a call originating from the mobile subscriber (or call forwarding) and terminating thereat that requires a carrier connection will be routed to the relevant carrier according to the CAC, PIC or default carrier indicated and in that order.
- GMSC Gateway MSC
- the PIC information may be entered into the HLR 26 through the CAS 34 and SOG 32, as illustrated and described in connection with FIGURE 1, updating the HLR 26 database accordingly.
- the GMSC 40 coordinating a call to the mobile subscriber, i.e., mobile station 20, will interrogate the HLR 26 and the pertinent data records 26A therein as to the subscriber's current location within the PLMN 10, the roaming number of the MS 20, and the applicable PIC or other carrier code applicable to that called subscriber, all of which information are forwarded to the GMSC 40.
- the GMSC 40 receives an incoming call (step 1 as illustrated) to the aforementioned mobile subscriber and requests (step 2) routing information as to that subscriber from the HLR 26, which forwards (step 3) the aforedescribed location and carrier information to the GMSC 40, which makes the necessary connections and forwards this information to the pertinent MSC 14 and VLR 16 for that locale (step 4) if no pertinent restrictions apply for that subscriber.
- MAP Mobile Application Part
- the data records 26A, the restriction flag information 16A and restrictive information in database 20A may, instead of each constituting a discrete new record, each constitute a portion of the subscriber profile data stored in the HLR 26 or downloaded therefrom to the VLR 16 or MS 20, respectively, in accordance with the description set forth in connection with the previous embodiments.
- a carrier restriction code, flag or indicator is added to the subscriber profile data protocol, said indicator indicating the particular type of carrier restriction applicable for that subscriber.
- the indicator is stored, along with the other subscriber profile data, in the HLR 26 and passed to the VLR 16 in the aforementioned Insert_Subscriber_Data message.
- the indicator and other information is forwarded from the GMSC 40, which got it f r o m t h e H L R 2 6 i n a Send_Routing_Information_Acknowledgement signal, to the pertinent VLR 16 in the subscriber's current locale.
- the MSC 14/VLR 16 will check the indicator, e.g. , flag 16A, for a restriction. If no restrictions are indicated, default handling applies and the call proceeds in a conventional manner. If the indicator flag 16A indicates that no carrier calls are allowed at all, then the attempted call is released and an appropriate announcement forwarded to the subscriber or user. If the indicator flag 16A indicates that carrier calls are allowed on PIC only, then no other carriers may be used.
- the indicator e.g. , flag 16A
- the call proceeds in a conventional manner as described, but, if a CAC or other toll call is attempted, then the call is terminated and the appropriate announcement made .
- the GMSC 40 receives an incoming call, which must be forwarded to the pertinent MSC 14 across a carrier to an MS 20, carrier restrictions may apply.
- the GMSC 40 first interrogates the HLR 26, i.e., forwards a Send_Routing_Information request as shown in FIGURE 6, which responds with the profile data including the indicator for that subscriber. If no restrictions apply, the call proceeds conventionally. If no carrier calls are allowed, the call is terminated.
- the call proceeds, else it, too, is terminated.
- a call to the subscriber proceeds from the GMSC 40 in Los Angeles to the pertinent MSC 14/VLR 16 in New York through a carrier, i.e., long distance.
- the carrier used in such instance will either be PIC or a default carrier in that order.
- the number of different applicable carrier restrictions is preferably small in number, the number of such restrictions may be of any size. However, it is preferred that the number be small enough to be compatible with storage within the existing protocol mechanisms, such as MAP signaling.
- the aforedescribed indicator may be resident within the database 20A of the MS 20. In this manner, calls originating from the MS 20 may be screened before entering the network 10. In other words, if there are no restrictions indicated within the database 20A, default handling applies and the call proceeds through to the network 10. If all carrier calls are restricted, the call terminates there with the appropriate announcement to the user such as on a display. Lastly, if only PIC calls are allowed, only PIC calls enter the network 10.
- CAC or other toll calls are terminated at the source in the aforedescribed manner.
- the aforedescribed indicator in the database 20A of the MS 20 may refer to the HLR 26 for a determination whether the particular carrier-access cellular call in question is restricted, i.e., by reference to the database 26A, or refer to the database 16A within the respective VLR 16 to make that determination without going further and involving the HLR 26 and other system resources.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU55977/98A AU745537B2 (en) | 1996-12-18 | 1997-12-15 | Selective carrier denial for mobile subscribers |
CA002275490A CA2275490A1 (en) | 1996-12-18 | 1997-12-15 | Selective carrier denial for mobile subscribers |
BR9713763-4A BR9713763A (en) | 1996-12-18 | 1997-12-15 | Cellular communications system, and process for denial of selective concessionaire |
EP97952345A EP0948872A2 (en) | 1996-12-18 | 1997-12-15 | Selective carrier denial for mobile subscribers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/768,812 US6081731A (en) | 1996-12-18 | 1996-12-18 | Selective carrier denial for mobile subscribers |
US08/768,812 | 1996-12-18 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998027781A2 true WO1998027781A2 (en) | 1998-06-25 |
WO1998027781A3 WO1998027781A3 (en) | 1998-10-29 |
Family
ID=25083552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/022609 WO1998027781A2 (en) | 1996-12-18 | 1997-12-15 | Selective carrier denial for mobile subscribers |
Country Status (8)
Country | Link |
---|---|
US (1) | US6081731A (en) |
EP (1) | EP0948872A2 (en) |
CN (1) | CN1247007A (en) |
AU (1) | AU745537B2 (en) |
BR (1) | BR9713763A (en) |
CA (1) | CA2275490A1 (en) |
HU (1) | HUP0003205A3 (en) |
WO (1) | WO1998027781A2 (en) |
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1996
- 1996-12-18 US US08/768,812 patent/US6081731A/en not_active Expired - Lifetime
-
1997
- 1997-12-15 AU AU55977/98A patent/AU745537B2/en not_active Ceased
- 1997-12-15 HU HU0003205A patent/HUP0003205A3/en unknown
- 1997-12-15 WO PCT/US1997/022609 patent/WO1998027781A2/en not_active Application Discontinuation
- 1997-12-15 CA CA002275490A patent/CA2275490A1/en not_active Abandoned
- 1997-12-15 EP EP97952345A patent/EP0948872A2/en not_active Withdrawn
- 1997-12-15 CN CN97181856.8A patent/CN1247007A/en active Pending
- 1997-12-15 BR BR9713763-4A patent/BR9713763A/en not_active IP Right Cessation
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EP0212654A2 (en) * | 1985-08-30 | 1987-03-04 | AT&T Corp. | Method and apparatus for disallowing the extension of a call through a network |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000019759A1 (en) * | 1998-09-29 | 2000-04-06 | Nokia Networks Oy | Call forwarding in a telecommunications network |
US6385446B2 (en) | 1998-09-29 | 2002-05-07 | Nokia Networks Oy | Call forwarding in a telecommunications network |
EP1257139A1 (en) * | 2001-05-10 | 2002-11-13 | Telefonaktiebolaget L M Ericsson (Publ) | Routing of incoming traffic in shared mobile telecommunication networks |
WO2002091782A1 (en) * | 2001-05-10 | 2002-11-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Routing of incoming traffic in shared mobile telecommunication networks |
Also Published As
Publication number | Publication date |
---|---|
WO1998027781A3 (en) | 1998-10-29 |
BR9713763A (en) | 2000-02-01 |
HUP0003205A3 (en) | 2002-11-28 |
AU745537B2 (en) | 2002-03-21 |
EP0948872A2 (en) | 1999-10-13 |
AU5597798A (en) | 1998-07-15 |
CN1247007A (en) | 2000-03-08 |
US6081731A (en) | 2000-06-27 |
HUP0003205A2 (en) | 2001-02-28 |
CA2275490A1 (en) | 1998-06-25 |
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