WO1997028663A1 - Selection de porteuses intercirconscriptions telephoniques dans un reseau de telecommunications sans fil - Google Patents

Selection de porteuses intercirconscriptions telephoniques dans un reseau de telecommunications sans fil Download PDF

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Publication number
WO1997028663A1
WO1997028663A1 PCT/US1997/001814 US9701814W WO9728663A1 WO 1997028663 A1 WO1997028663 A1 WO 1997028663A1 US 9701814 W US9701814 W US 9701814W WO 9728663 A1 WO9728663 A1 WO 9728663A1
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WO
WIPO (PCT)
Prior art keywords
visitor location
subscriber
network
record
call
Prior art date
Application number
PCT/US1997/001814
Other languages
English (en)
Inventor
Anousheh Raissyan
Original Assignee
Mci Communications Corporation
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 Mci Communications Corporation filed Critical Mci Communications Corporation
Publication of WO1997028663A1 publication Critical patent/WO1997028663A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • 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 to the field of vireless communications.
  • the invention relates to establishing a call path using the services of a designated interexchange carrier company in a multi-carrier telecommunications environment.
  • I2T7ENTICN Existing wire-based telecommunications networks comprise a plurality of local exchanges which are served by local telephone companies. Calls that originate within one exchange and terminate within another are handled at the origin and termination by the local telephone companies.. Batv ⁇ eis local telephone company connections, the call is handled by an interexchange carrier company (IXC) , which usually is separate from the local telephone company.
  • IXC interexchange carrier company
  • interexchange carrier provides service between any two local telephone exchange carriers (LEC) .
  • LEC local telephone exchange carriers
  • the interexchange carrier for any given call is selected at the local telephone company.
  • the originating subscriber can specify to the local telephone company a particular interexchange carrier to use for a call.
  • One method that a subscriber may use to specify an interexchange carrier in a wire-based system is disclosed in U.S. Patents No. 4,577,066 to Bi cnte et al.. No. 4,565,903 to Riley, and No. 4,555,594 to Friedes et al.
  • Each subscriber is allowed to pre-subscribe to any available interexchange carrier, and the information related to that carrier is stored as a record entry within a subscriber database.
  • the local telephone company can use the subscriber's database entry to establish a call path to the previously selected interexchange carrier. The subscriber therefore need only dial the number of the recipient of a long distance call and the call is automatically connected through the selected interexchange carrier.
  • the above system presents significant ease-of-use tc a subscriber of the local telephone company, while the local telephone company incurs the cost of maintenance of the subscriber database records. Record retrieval and routing of calls to interexchange carriers occur at the same site, and thus the system is useful even for a very large number of subscribers.
  • GSM digital mobile telephone system
  • MS mobile subscribers
  • HLR home location register
  • the HLR sends and receives information from a number of visitor location registers (VLR's) , each of which may be associated with a mobile telephone switching office, also referred to herein as a mobile switching center (MSC) .
  • VLR's visitor location registers
  • MSC mobile switching center
  • the VLR's contain information on subscribers that are physically within a limited geographic area served by a corresponding VLR. Therefore, there are a large number of VLR's within a mobile network.
  • a single HLR handles data for a mobile network covering a relatively large geographic area made up of the limited areas served by a large number of VLR's.
  • Each VLR communicates with the HLR to update the location of the subscribers in the HLR database as they enter and leave the area of each VLR.
  • a gateway MSC GMSC
  • GMSC gateway MSC
  • a VLR has all the information necessary to establish a call path from one subscriber within its geographic area to another subscriber within its geographic area.
  • VLR Voice Call Location Function
  • gateways to other networks.
  • multiple VLR's must communicate with a single HLR site before each call is enabled, the presence of a large number of VLR's increases both the signal processing and data storage and retrieval requirements at the HLR site, especially since all signalling should be substantially transparent to the subscribers. It therefore would be desirable to reduce the load on the HLR site and its communication links by enabling each VLR to route a call to an individual subscriber's selected interexchange carrier when the call destination is within another LEC.
  • a principal object of the present invention is to provide a GSM wireless telecommunications network wherein services profile data for each subscriber on the wireless network includes selection of a preferred interexchange carrier. It is a further object of the invention to enable each subscriber to select a preferred interexchange carrier for calls outside the local wireless network and to route an outgoing call using the subscriber's selected carrier without requiring repeated communication with a central database site.
  • the database at each local switching site contains subscriber records for all subscribers within the geographic area of the switching site, and these records are updated as subscribers move among the switching sites.
  • a local switching site of the invention can route outgoing calls to the subscriber's selected interexchange carrier without communicating each time with a central database as the calls are processed.
  • Fig. 1 is a diagram of the elements of a wireless communication network in accordance with the invention
  • Fig. 2 is a diagrammatic illustration of the signaling and messaging for creating a local data record in a VLR of the network of Fig. 1;
  • Fig. 3. is a table illustrating some of the data stored in the location registers in accordance with the invention.
  • Fig. 4 is a diagrammatic illustration of the signaling and messaging for an outgoing call to an interexchange carrier from a VLR in the network of Fig. 1.
  • the preferred embodiment of the invention is described below as an improvement upon a digital mobile telephone system using the GSM format.
  • Fig. 1 of the drawings is a diagram of the elements of a wireless communication network in accordance with the invention.
  • a number of mobile subscribers (MS) 101 are connected to the network through a base transceiver station and a base station center (BTS/BSC) 102, there being a BTS/BSC for each of the local switching sites 104.
  • BTS/BSC base station center
  • Corresponding mobile switch centers (MSC's) 105 and visitor location registers (VLR's) 106 control the local switch sites. All VLR's can communicate with at least one central database site 110 that includes a home location register (HLR) 112.
  • HLR home location register
  • the HLR 112 may be incorporated into one of the mobile switching centers 105 such that central database site 110 would be coextensive with a local switching site 104.
  • the local switch site 104 can complete a call path either to another switch site on the same GSM network or to a gateway to another GSM network.
  • the other GSM network may be an interexchange carrier (IXC) network 121.
  • the IXC network 121 would in turn be connected to a local exchange carrier (LEC) 131 corresponding to the called number represented by land wire telephone 140.
  • LEC local exchange carrier
  • the serving MSC after determining that a roaming subscriber is currently within its service area, the serving MSC sends a registration notification (RN) to its VLR.
  • the new serving MSC may detect a roaming subscriber's presence through automatic registration without a call request, call origination, call termination, or a service order. If the roaming subscriber has previously registered with an MSC within the domain of the VLR, the VLR may take no further action other than to record the identity of the MSC currently serving the roaming subscriber.
  • the VLR sends a RN signal to the HLR associated with the roaming subscriber.
  • the MSC recognizes this association based on the mobile identification number (MIN) reported by the roaming mobile subscriber's unit upon entering the new service area.
  • MIN mobile identification number
  • the RN signal sent from the VLR to the MSC may be contingent upon an authorization response received from the HLR. For example, the roaming subscriber may not currently be a valid subscriber of the system in which the HLR is located.
  • the HLR sends a registration cancellation signal to the previously visited VLR. That prior serving VLR, upon receipt of the cancellation message, may remove all records of the roaming subscriber from its memory.
  • the cancellation signal can be sent by the HLR at any time after it receives the RN signal.
  • the new serving VLR creates an entry for the roaming subscriber in its internal data structure and may send a qualification request signal to the HLR in order to authenticate the roaming subscriber and determine the validation requirements.
  • the VLR if required, may then send a service profile request signal to the HLR to obtain the service profile record for the roaming subscriber.
  • this service profile record includes a preferred carrier identification code (PCIC) identifying the IXC selected and designated by the subscriber for calls terminating outside of the local network.
  • PCIC preferred carrier identification code
  • a VLR 106 of the invention must first have a local service profile record for the subscriber.
  • the local record is created in a VLR for serving a roaming subscriber by a location update procedure, which is illustrated in the diagram of Fig. 2.
  • the local switch site 104 responds to a location update request 220 from a mobile subscriber 101 when the subscriber enters the coverage area of the switch.
  • the update request may be initiated automatically or in response to the next service request.
  • the VLR 106 communicates the new location (switch address) of the roaming subscriber to the HLR 112 in an "update location" message 230, which also includes the VLR number and the mobile identity number (MIN) assigned tq the subscriber's mobile unit.
  • the HLR 112 after updating the central record 11 , communicates centrally maintained subscriber profile data 240 back to the VLR site 104. Profile data 240 is then stored in the VLR along with other data of the types illustrated in Fig. 3.
  • one of the fields within the data 240 sent from the HLR to the local site is a preferred carrier identification code (PCIC) , which identifies the subscriber's choice of a preferred interexchange carrier (PIC) .
  • PCIC carrier identification code
  • PIC interexchange carrier
  • the called number When a mobile subscriber places an outgoing call, the called number may be on the same wireless network and within the area of the same local VLR, on the same wireless network and within the area of another VLR, or on a different network.
  • the local VLR has all the information necessary to complete the call if both mobile subscribers are on the same VLR database. No communication with the HLR is necessary.
  • the calling VLR of the invention may retrieve the current location of the called mobile subscriber from the HLR.
  • the calling VLR may be programmed to obtain the location of that subscriber directly from the called VLR via direct communication links as represented by broken line arrows
  • the local switching sites 104 may be programmed to exchange that data so that no communication with the HLR is necessary.
  • VLR Voice Call Recommendation Dial Location
  • Fig. 4 A diagram of the signaling and messaging for an outgoing call to an IXC network is shown in Fig. 4. This preferably includes a service request 320, authentication and ciphering cycles 330, and a call setup 331, all between the MS 101 and the local switch site 104.
  • the VLR of the invention preferably uses the subscriber's PCIC within the local profile record to choose the destination IXC 121. As the addresses of the gateways to the IXC's are fixed within the network, the VLR of the invention can complete the call without communicating with the HLR as shown in steps 350 of the diagram of Fig. 4. These steps include call proceeding signaling and alert and connect signaling, followed by transmission of data and/or voice conversation. The selected IXC network then completes the call to the appropriate local exchange carrier (LEC) 131 corresponding to the called number.
  • LEC local exchange carrier
  • a VLR may obtain on a one time basis and transcribe all data necessary to complete a call path to a fixed site on a distant LEC network.
  • a lower overall communication load on the HLR may therefore be achieved by a relatively small increase in communication during location updates.
  • An alternative method of providing automatic selection of a preferred interexchange carrier is to store the carrier routing information at a central database site as part of the subscriber's service profile stored at this site.
  • a local switch queries the central database and receives a preferred carrier identification code if the calling party has specified the use of a particular interexchange carrier.
  • the mobile subscriber enjoys the ease-of-use and preferred IXC provided by the subscriber's network profile, as is customary with wire-based networks.

Abstract

Cette invention se rapporte à un réseau de télécommunications sans fil servant à établir un trajet d'appel vers une passerelle d'interface préférée choisie parmi une ou plusieurs passerelles d'interfaces reliant d'autres réseaux fournissant des services vers des destinations d'appels ne se trouvant pas sur ce réseau sans fil. Ce réseau sans fil fournit des communications sous format GSM et comprend plusieurs registres de positions visiteurs (106) ayant chacun une base de données locale, et au moins une base de données commune (110) contenant des informations relatives à plusieurs abonnés mobiles (101). Au moins une partie des données relatives à l'abonné dans la base de données commune est transcrite dans la base de données locale. Les données ainsi transcrites contiennent une désignation correspondant à la sélection par l'abonné d'un réseau de transmission par fil à utiliser pour les destinations d'appels situées à l'extérieur du réseau sans fil. Cette désignation est utilisée pour établir le trajet d'appel pour les appels sortant vers les destinations situées à l'extérieur du réseau sans fil.
PCT/US1997/001814 1996-02-01 1997-01-31 Selection de porteuses intercirconscriptions telephoniques dans un reseau de telecommunications sans fil WO1997028663A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59511496A 1996-02-01 1996-02-01
US08/595,114 1996-02-01

Publications (1)

Publication Number Publication Date
WO1997028663A1 true WO1997028663A1 (fr) 1997-08-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999025138A1 (fr) * 1997-11-11 1999-05-20 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif, reseau et procedes se rapportant aux telecommunications sans fil
WO1999025139A1 (fr) * 1997-11-11 1999-05-20 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif, reseau et procedes relatifs a la telecommunication sans fil
WO2000059241A1 (fr) * 1999-03-31 2000-10-05 Telefonaktiebolaget Lm Ericsson (Publ) Systeme et procede de selection de supports d'echanges intercentraux
EP1139683A1 (fr) * 2000-03-28 2001-10-04 BRITISH TELECOMMUNICATIONS public limited company Transfert d' informations d' abonné vers le réseau visité

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5400390A (en) * 1991-06-06 1995-03-21 Nokia Telecommunications Oy Method for establishing an inbound call to the mobile telephone in a GSM cellular mobile telephone network
US5442682A (en) * 1992-07-03 1995-08-15 Telefonaktiebolaget Lm Ericsson Method for registering traffic data in a telecommunication system
US5590175A (en) * 1995-05-17 1996-12-31 Mci Communications Corporation Method and system for enhanced call completion in telecommunications mobility applications

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5400390A (en) * 1991-06-06 1995-03-21 Nokia Telecommunications Oy Method for establishing an inbound call to the mobile telephone in a GSM cellular mobile telephone network
US5442682A (en) * 1992-07-03 1995-08-15 Telefonaktiebolaget Lm Ericsson Method for registering traffic data in a telecommunication system
US5590175A (en) * 1995-05-17 1996-12-31 Mci Communications Corporation Method and system for enhanced call completion in telecommunications mobility applications

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999025138A1 (fr) * 1997-11-11 1999-05-20 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif, reseau et procedes se rapportant aux telecommunications sans fil
WO1999025139A1 (fr) * 1997-11-11 1999-05-20 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif, reseau et procedes relatifs a la telecommunication sans fil
US6301483B1 (en) * 1997-11-11 2001-10-09 Telefonaktiebolaget Lm Ericsson (Publ) Device network and methods concerning cordless telecommunication
WO2000059241A1 (fr) * 1999-03-31 2000-10-05 Telefonaktiebolaget Lm Ericsson (Publ) Systeme et procede de selection de supports d'echanges intercentraux
EP1139683A1 (fr) * 2000-03-28 2001-10-04 BRITISH TELECOMMUNICATIONS public limited company Transfert d' informations d' abonné vers le réseau visité
WO2001074109A1 (fr) * 2000-03-28 2001-10-04 British Telecommunications Public Limited Company Transfert d'informations d'abonne vers des reseaux visites

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