WO1998012886A1 - Gestion de la localisation d'un terminal sans fil - Google Patents

Gestion de la localisation d'un terminal sans fil Download PDF

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Publication number
WO1998012886A1
WO1998012886A1 PCT/FI1997/000559 FI9700559W WO9812886A1 WO 1998012886 A1 WO1998012886 A1 WO 1998012886A1 FI 9700559 W FI9700559 W FI 9700559W WO 9812886 A1 WO9812886 A1 WO 9812886A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
pbx
exc
location information
subscriber
Prior art date
Application number
PCT/FI1997/000559
Other languages
English (en)
Inventor
Lauri Lahtinen
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Priority to AU43053/97A priority Critical patent/AU4305397A/en
Priority to EP97919086A priority patent/EP0974239A1/fr
Priority to JP10514327A priority patent/JP2001500703A/ja
Publication of WO1998012886A1 publication Critical patent/WO1998012886A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/16—WPBX [Wireless Private Branch Exchange]

Definitions

  • the invention relates to supporting the mobility of wireless termi- nals, such as DECT telephones, in a telephone network.
  • wireless terminals such as DECT telephones, as described in ETSI Standard 300 175 Radio Equipment and System: Digital Cordless European Telephone, Common Interface, Sections 1 to 9, can be connected to a Public Integrated Services Network PISN.
  • the DECT System comprises a base station FP (Fixed Part), usually connected to the PISN via a Private Branch Exchange PBX.
  • base stations FP There are three main types of base stations FP: a home base station or a base station to be connected to an office PBX and so-called telepoint base stations.
  • a conventional wired tele- phone network e.g.
  • DPNSS and DSS.1 are used, which are described in the CCITT (now ITU) Specification: "DSS.1 , Q.930 to Q.940, 1989, Digital Subscriber Signalling System No. 1 , Network Layer, User- Network Management". These signalling protocols support the mobility of the subscriber very poorly or not at all.
  • services of a PBX network can be supplemented with Intelligent Network (IN) technique determined e.g. in the specifications of ITU Q.1200 series.
  • IN technique it is possible to combine telecommunications networks of different types, such as the PISN and cellular mobile systems, e.g. GSM and NMT, not shown separately in Figure 1.
  • the principle of IN technique is that the signalling needed for establishing a speech connection takes place controlled by the IN, but the actual speech connection is switched by known functions of the communications network in question.
  • FMD Me Destination
  • the subscriber may control his incoming calls to a desired number, which can be e.g. an extension number of the PBX network or a mobile network number.
  • a desired number can be e.g. an extension number of the PBX network or a mobile network number.
  • a Terminal Equipment TE1 user moving from a first DECT system DECT1 to a second system DECT2 may order a call transfer to an extension number of this second system.
  • a call transfer requires activity and carefulness of the subscriber.
  • the subscriber has to know the extension number to which calls shall be transferred and to remember to give this information to the operator.
  • the object of the invention is to develop a method and an equipment implementing the method in such a way that the above problems with the subscriber mobility and location management can be solved.
  • the objects of the invention are achieved by a method and a system, which are characterized in what is set forth in the independent claims. Preferred embodiments of the invention appear from the dependent claims.
  • the invention is based on the fact that subscriber location data are maintained by means of IN technique. Signalling between a telephone ex- change and a PBX is supplemented with extra information on the location of the subscriber terminal.
  • An advantage of the method and system of the invention is an improved support to the mobility of the subscriber.
  • the subscriber does not need to determine separately the extension number to which he wishes to transfer his calls. It is enough that the subscriber starts his phone in the area of a new PBX.
  • the invention does not require changes in existing terminals.
  • the invention can also be applied to double-mode terminals, such as GSM/DECT telephones, which means that the invention saves radio resources, since the greatest possible part of the signalling takes place via a wired telephone net- work.
  • Figures 2A and 2B show a location updating according to the invention in a DECT system
  • Figure 3A shows signalling in case of a mobile terminated call
  • Figure 3B shows signalling in case of an internal call in a PBX.
  • a PBX is supplemented in a way which is to some extent analogous with the home and/or visitors location register of mobile systems.
  • a home PBX HPBX
  • HPBX home PBX
  • a PBX other than HPBX Visited PBX (VPBX).
  • Each PBX comprises both HPBX and VPBX functionality.
  • a transmitting exchange EXC is any exchange via which the PBXs are con- nected to the PISN and/or mobile networks.
  • the EXC is supposed 1) to have an interface to the PBXs for a speech connection, 2) to support an interface to a Service Switching Point SSP of the IN for a signalling connection and 3) to support the INAP signalling protocol extended for this purpose (INAP extensions).
  • a roaming number ROAM# is allocated to a subscriber moving to the area of a VPBX.
  • a fixed area can be reserved from the number space of said PBX for the roaming numbers. In this way, it is possible to avoid consuming the numbers of the PISN.
  • a functionality supporting subscriber mobility can be implemented for instance by a suitable addition to the conventional call setup protocol between the PBX and the EXC.
  • Messages used for call setup may include an extra packet El (Extra Information).
  • the El packet can be coded in different ways in different signalling protocols. In case of the DSS.1 protocol of the ex- ample, suitable information elements are e.g. FACILITY and USER_TO_USER. A separate specific field can also be defined for this purpose.
  • the extra packet El is transparent to the EXC (the exchange does not react to it).
  • the purpose of the El packet is to support the subscriber's mobility in such a way that an information on the subscriber's location can be trans- mitted via the SSP of the IN to a Service Control Point SCP of the IN. On the other hand, the SCP maintains data in a Service Data Point SDP. By means of the extra packet, information on subscriber identification or authentication, for instance, can be transferred.
  • a logic interface between the PBX and the IN - especially its SCP - comprises two functionalities according to the invention: location updating and location cancellation.
  • the VPBX informs the SCP of the IN that the terminal TE tries to register to the area of a new PBX.
  • the SCP checks from the SDP the subscriber data and especially whether said subscriber has the right to use the services of the new VPBX.
  • the SCP removes from the SDP the information on that the terminal TE is in the area of the VPBX.
  • Figure 2A shows a possible signalling when a terminal registers to the area of a VPBX. To keep the figure illustrative, only steps essential for the invention are shown.
  • reference numerals 2A-1 , 2B-1 , etc. signify corresponding steps in Figures 2A, 2B, etc.
  • step 2A-1 the terminal TE sends to the VPBX a Location Update Request including the identity of the TE or its subscriber. It is assumed initially that the identity is e.g. an International Portable User Identity IPUI.
  • the VPBX notices that said terminal is not registered to this PBX and that the HPBX of the terminal is other than the VPBX. Therefore, a calling subscriber's roaming number (CLG#ROAM#, Calling Number Roaming Number) is allocated to the terminal.
  • the roaming numbers are preferably reserved from the number space of the PBX. In this way, it is possible to avoid consuming the numbers of the PISN.
  • the PBX sends the EXC a call setup request SETUP including, in addition to the number of the called subscriber, i.e. subscriber B, also the roaming number allocated in step 2A-1 and the above-mentioned extra packet El.
  • the El packet includes the information on that the type of the task is location updating LU of a terminal/subscriber whose identity is IPUI.
  • the EXC performs a number analysis of the called subscriber number and notices that an IN service request has to be made for location updating of the terminal TE in the SDP of the intelligent network.
  • step 2A-3 the EXC sends a service request INVOKE to the SCP of the IN. This joins together the identity of the terminal or its subscriber, such as the IPUI number, and the subscriber number of the terminal, such as the TE_MSISDN number, which is returned to the EXC in a Connect message in step 2A-4.
  • step 2A-5 the EXC sends the HPBX a location cancellation message LC, which can be for instance a call setup request SETUP supplemented with an extra packet El according to the invention.
  • the El packet in- eludes in this step an information on that the subscriber location of the terminal in the area of the HPBX is cancelled.
  • step 2A-6 the HPBX sends an ALERT message to the EXC.
  • step 2A-7 the EXC sends a corresponding ALERT message to the VPBX, which in step 2A-8 acknowledges the location updating of the terminal TE.
  • steps 2A-9 and 2A-10 the signalling connections are cancelled. If an International Portable Equipment Identity IPEI is used instead of the subscriber's IPUI, the signalling functions as described above, except that the location data of the physical terminal TE are maintained, instead of those of the subscriber.
  • IPEI International Portable Equipment Identity
  • FIG. 2B shows the signalling in case if the TE returns to the area of its HPBX.
  • the signalling corresponds to the steps described in connection with Figure 2A, but the tasks of the HPBX and VPBX are inverse during the steps 2B-1 to 2B-9.
  • the steps 2A-n and 2B-n can be indicated by a common marking 2x-n.
  • the location of the TE is updated from the VPBX to the HPBX.
  • the terminal TE receives a call, when it is within the area of a VPBX.
  • the signalling takes place as follows.
  • a call comes to an EXC from another exchange EXC2 not shown, which can be an exchange of the PISN or equally well a mobile network exchange.
  • the EXC sends the SCP of the IN a service request INVOKE including the TE_MSISDN number of the terminal.
  • the SCP returns to the EXC a roaming number CLD#ROAM# allocated to the terminal.
  • step 3A-4 the EXC concludes from the roaming number that the TE exists in the area of the VPBX and sends said PBX a call setup request.
  • the steps 3A-5 to 3A-10 correspond to conventional call setup.
  • the terminal TE is paged and, in step 3A- 6, it responds to the paging, etc.
  • step 3A-10 the EXC sends an Ac- cess_Complete Message to the other exchange EXC2.
  • Figure 3B shows signalling in case of an internal call in an HPBX of a DECT system. It is assumed that subscriber A is TE1 and subscriber B is TE2, respectively. The signalling takes place in the same way as in a conventional DECT call. No service request to the SCP of the IN is needed, because the HPBX notices in step 3B-2 that the subscriber B is in the area of the same PBX and can start paging according to the prior art. If the subscriber B were in the area of a VPBX, the signalling would take place in the same way as in Figure 3A, but the call would be started from the terminal TE1 of the subscriber A, instead of starting from the EXC2.
  • a physical implementation of the invention presupposes that location updating and call setup messages according to the prior art are supplemented with extra information elements of the invention. This is implemented in the easiest way by changes in software. To be precise, the arrangement of the invention comprises the following changes-
  • PBX comprises means for indicating location information for a terminal TE of a wireless network
  • the PBX comprises means for adding the location information and the identity (IPUI/IPEI) of the TE to a call setup message SETUP;
  • an EXC comprises means for sending the location information and the identity of the TE to a node SCP of an IN in connection with a service request INVOKE;
  • the node SCP of the IN comprises means for adding the location information and the identity of the TE to the ISDN number of the TE.
  • the invention has been described by way of example in connection with the DECT system and assuming that DSS.1 signalling is used between the PBXs and the exchanges On the basis of the above description, it is easy for one skilled in the art to apply the invention to other wireless telephone systems as well. It is also clear that the invention is equally suitable for loca- tion management of all kinds of mobile terminals, not only of a telephone. The invention and its embodiments are thus not restricted to the above examples, but they can vary within the scope of the claims.

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

Abstract

Des données de localisation d'un terminal (TE) d'abonné sont conservées au moyen d'une technique de réseau intelligente. A la signalisation entre un central téléphonique (EXC) et un standard privé PBX s'ajoutent des informations supplémentaires contenant les informations relatives à la localisation du TE d'abonné. Un numéro d'abonné itinérant (R0AM#) est affecté à un TE se déplaçant dans la zone d'un PBX visité (VPBX). Au protocole d'établissement d'appel entre le PBX et l'EXC s'ajoute un paquet supplémentaire (EI) prenant en charge la mobilité de l'abonné de manière que les informations relatives à la localisation de l'abonné puissent être transmises à un point de commande de service (SCP) du réseau intelligent. En liaison avec l'actualisation de la localisation, le VPBX informe le réseau intelligent (SCP) que le TE essaie de se rattacher à la zone du VPBX. Le réseau intelligent (SCP) contrôle si ledit abonné à le droit d'utiliser les services du VPBX. Dans le cas d'un appel effectué vers le TE, l'EXC demande au réseau intelligent (SCP) de localiser les informations du TE sur la base du numéro d'abonné du TE. Ensuite, l'EXC établit une connexion avec le PBX indiqué par les informations de localisation, lequel PBX établit un appel vers ledit TE.
PCT/FI1997/000559 1996-09-19 1997-09-18 Gestion de la localisation d'un terminal sans fil WO1998012886A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU43053/97A AU4305397A (en) 1996-09-19 1997-09-18 Location management of a wireless terminal
EP97919086A EP0974239A1 (fr) 1996-09-19 1997-09-18 Gestion de la localisation d'un terminal sans fil
JP10514327A JP2001500703A (ja) 1996-09-19 1997-09-18 無線端末の位置管理

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI963722 1996-09-19
FI963722A FI102125B (fi) 1996-09-19 1996-09-19 Langattoman päätelaitteen sijainninhallinta

Publications (1)

Publication Number Publication Date
WO1998012886A1 true WO1998012886A1 (fr) 1998-03-26

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Application Number Title Priority Date Filing Date
PCT/FI1997/000559 WO1998012886A1 (fr) 1996-09-19 1997-09-18 Gestion de la localisation d'un terminal sans fil

Country Status (5)

Country Link
EP (1) EP0974239A1 (fr)
JP (1) JP2001500703A (fr)
AU (1) AU4305397A (fr)
FI (1) FI102125B (fr)
WO (1) WO1998012886A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0944271A1 (fr) * 1998-03-18 1999-09-22 Alcatel Réseau de télécommunication avec des centrales de télécommunication, stations de base et station mobile correspondante
WO2006031419A2 (fr) 2004-09-10 2006-03-23 Cisco Technology, Inc. Transfert entre réseaux sans fil cellulaires et d'entreprise
EP1864519A2 (fr) * 2005-03-02 2007-12-12 Roamware, Inc. Systeme de controle d'appels entrants d'usager itinerant
CN100373957C (zh) * 2003-02-11 2008-03-05 中兴通讯股份有限公司 一种无线市话系统及实现漫游的方法
CN1633187B (zh) * 2003-12-22 2010-04-07 华为技术有限公司 基于用户小交换机的通信系统及其实现通信的方法
CN102083232A (zh) * 2009-11-26 2011-06-01 中国移动通信集团北京有限公司 Vpmn语音业务的实现方法及其系统和装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993025050A1 (fr) * 1992-05-25 1993-12-09 Nokia Telecommunications Oy Reactualisation de la localisation dans un reseau radio cellulaire
WO1995033348A1 (fr) * 1994-05-31 1995-12-07 Telefonaktiebolaget Lm Ericsson Dispositif pour un systeme de telecommunications
WO1996018273A1 (fr) * 1994-12-07 1996-06-13 Telefonaktiebolaget Lm Ericsson Acces mobile pour mobilite de terminal sans fil

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993025050A1 (fr) * 1992-05-25 1993-12-09 Nokia Telecommunications Oy Reactualisation de la localisation dans un reseau radio cellulaire
WO1995033348A1 (fr) * 1994-05-31 1995-12-07 Telefonaktiebolaget Lm Ericsson Dispositif pour un systeme de telecommunications
WO1996018273A1 (fr) * 1994-12-07 1996-06-13 Telefonaktiebolaget Lm Ericsson Acces mobile pour mobilite de terminal sans fil

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0944271A1 (fr) * 1998-03-18 1999-09-22 Alcatel Réseau de télécommunication avec des centrales de télécommunication, stations de base et station mobile correspondante
CN100373957C (zh) * 2003-02-11 2008-03-05 中兴通讯股份有限公司 一种无线市话系统及实现漫游的方法
CN1633187B (zh) * 2003-12-22 2010-04-07 华为技术有限公司 基于用户小交换机的通信系统及其实现通信的方法
WO2006031419A2 (fr) 2004-09-10 2006-03-23 Cisco Technology, Inc. Transfert entre réseaux sans fil cellulaires et d'entreprise
EP1787482A2 (fr) * 2004-09-10 2007-05-23 Cisco Technology, Inc. Transfert entre réseaux sans fil cellulaires et d'entreprise
EP1787482A4 (fr) * 2004-09-10 2012-12-05 Cisco Tech Inc Transfert entre réseaux sans fil cellulaires et d'entreprise
EP1864519A2 (fr) * 2005-03-02 2007-12-12 Roamware, Inc. Systeme de controle d'appels entrants d'usager itinerant
EP1864519A4 (fr) * 2005-03-02 2008-05-28 Roamware Inc Systeme de controle d'appels entrants d'usager itinerant
US7660580B2 (en) 2005-03-02 2010-02-09 Roamware, Inc. Inbound roamer call control system
US7917139B2 (en) 2005-03-02 2011-03-29 Roamware, Inc. Inbound roamer call control system
CN102083232A (zh) * 2009-11-26 2011-06-01 中国移动通信集团北京有限公司 Vpmn语音业务的实现方法及其系统和装置

Also Published As

Publication number Publication date
AU4305397A (en) 1998-04-14
FI102125B1 (fi) 1998-10-15
FI963722A0 (fi) 1996-09-19
FI102125B (fi) 1998-10-15
FI963722A (fi) 1998-03-20
JP2001500703A (ja) 2001-01-16
EP0974239A1 (fr) 2000-01-26

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