EP1135906A1 - Systeme et procede d'enregistrement de terminal mobile dans un reseau integre a commutation par paquets sans fil - Google Patents

Systeme et procede d'enregistrement de terminal mobile dans un reseau integre a commutation par paquets sans fil

Info

Publication number
EP1135906A1
EP1135906A1 EP99963740A EP99963740A EP1135906A1 EP 1135906 A1 EP1135906 A1 EP 1135906A1 EP 99963740 A EP99963740 A EP 99963740A EP 99963740 A EP99963740 A EP 99963740A EP 1135906 A1 EP1135906 A1 EP 1135906A1
Authority
EP
European Patent Office
Prior art keywords
mobile terminal
gateway
mobility server
serving
packet
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP99963740A
Other languages
German (de)
English (en)
Inventor
Hung Tran
Laura Hernandez
Jean-François Bertrand
Bartosz Balazinski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of EP1135906A1 publication Critical patent/EP1135906A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/10—Mapping addresses of different types
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
    • H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/1285—Details of finding and selecting a gateway for a particular call
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/06—De-registration or detaching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2207/00—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place
    • H04M2207/18—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • the present invention relates to telecommunication systems and, more particularly, to a system and method for registering mobile terminals, or stations, in an integrated wireless packet-switched network such as, for example, a network using the Internet Protocol (LP).
  • LP Internet Protocol
  • PSN packet-switched network
  • CSN circuit-switched network
  • Voice-over-LP LP-based networks designed for providing audio, video, and data communications on a unified foundation
  • VoIP Voice-over-LP
  • ITU Telecommunications Union
  • SIP Session Initiation Protocol
  • LPDC Internet Protocol Device Control
  • TRF Internet Engineering Task Force
  • SGCP Simple Gateway Control Protocol
  • VoLP networks implement communications infrastructures that are primarily oriented to operating with fixed-network-based telecommunications protocols. Consequently, the VoLP protocols designed to accommodate such services as call control, et cetera, for wireline subscribers cannot be used advantageously in wireless environments. Although some VoLP infrastructures may support rudimentary location management services, one of the more nettlesome problems with respect to integrating current VoIP networks and harnessing their full potential within the context of a wireless telecommunications network stems from the mobility of cellular subscribers.
  • a gatekeeper which provides, among other things, for call routing services and the registration of other H.323-compatible entities within a network, is typically unaware of conventional telecommunications terminals. While this condition is not a problem for fixed wireline telephones in terms of providing savings in long distance charges, calls involving mobile subscribers may still require establishing long distance trunks from one Mobile Switching Center (MSC) to another.
  • MSC Mobile Switching Center
  • the present invention is directed to a system and method for providing a dual registration scheme for a mobile terminal using an H.323-compatible entity, hereinafter denoted as an H.323 mobility server, provided within a wireless VoLP network.
  • the H.323 mobility server which in some respects operates as a gatekeeper in accordance with the teachings of the present invention, obviates the need for establishing inter-MSC trunks.
  • the present invention is directed to a method of registering and unregistering a mobile terminal in an integrated wireless packet-switched network system.
  • the integrated wireless packet-switched network system includes a cellular network portion and a packet-switched network portion, wherein the cellular network portion comprises a serving Mobile Switching Center (MSC), a Visitor Location Register (VLR), and a Home Location Register (HLR).
  • the VLR and the MSC form a serving system for the mobile terminal.
  • the packet-switched network portion preferably comprises a mobility server and a gateway. The method starts by detecting, in the serving system, the mobile terminal located in a service area associated with the serving system. The mobile terminal is then registered in the cellular network portion. Subsequently, the mobile terminal is also registered in the mobility server of the packet-switched network portion. If the serving system detects that the mobile terminal is either being powered down or no longer located in the serving area, the process of unregistering the mobile terminal in the cellular network portion and in the mobility server of the packet-switched network portion is commenced.
  • MSC Mobile Switching Center
  • VLR Visitor Location Register
  • HLR Home Location Register
  • the present invention is directed to an integrated wireless telecommunications network having a cellular network portion and a packet-switched network portion.
  • a gateway is disposed between the cellular and packet-switched network portions for providing a communication pathway therebetween.
  • the cellular network portion includes means for registering a mobile terminal in a serving system.
  • the packet-switched network portion includes means for registering the mobile terminal, responsive to an indication provided by the serving system via the gateway.
  • the present invention's integrated wireless telecommunications network comprises a serving system serving a mobile terminal located in its serving area.
  • a gateway is coupled to the serving system, the gateway providing a communications pathway between the cellular and packet-switched network (PSN) portions.
  • a mobility server is disposed in the PSN for registering the mobile terminal, the mobility server having means for maintaining location information with respect to a registered mobile terminal.
  • the serving system includes means for sending a private registration message to the gateway to indicate a registration update with respect to the mobile terminal.
  • the gateway includes means for translating the private registration message into a message compatible with the mobility server and for forwarding the translated message thereto.
  • the mobility server may be provided with an interface for interpreting or supporting the private registration message provided by the serving system.
  • the gateway does not have to translate the private registration message on behalf of the mobility server, and simply forwards the message thereto.
  • the present invention is directed to a method of keeping track of a mobile terminal in an integrated telecommunications network which includes a cellular network portion and an H.323-based PSN portion.
  • the cellular network portion comprises a serving system for the mobile terminal, which includes a serving MSC and a VLR.
  • the PSN portion includes a gateway that is coupled to the serving MSC.
  • the method provides amobility server in the H.323-based PSN portion, wherein the mobility server contains a registration database.
  • the claimed method registers the mobile terminal in the mobility server of the PSN portion.
  • the present invention is directed to a call routing method for routing an in-coming call towards a mobile terminal disposed in an integrated telecommunications network such as the network set forth above.
  • a mobility server for registering the mobile terminal in the PSN portion of the network
  • the in-coming call is received in a receiving system.
  • the receiving system queries the mobility server for locating the mobile terminal. Responsive to the querying step, the mobility server returns an address (e.g., an LP address) of the gateway that is associated with the serving system of the mobile terminal, to the receiving system. Thereafter, the in-coming call is routed by the network to the mobile terminal based on the address of the gateway.
  • an address e.g., an LP address
  • FIGS. 1A and IB depict functional block diagrams of an exemplary embodiment of a registration method for a mobile terminal disposed in an integrated wireless LP (WLLP) network provided in accordance with the teachings of the present invention
  • FIGS. 2 A and 2B depict functional block diagrams of an exemplary embodiment of an unregistration method for a mobile terminal in accordance with the teachings of the present invention.
  • FIGS .3 and 4 illustrate control message pathways for implementing a presently preferred exemplary embodiment of a call setup method usable in the WLLP network of the present invention.
  • the H.323 protocol developed originally to provide multimedia communications services over a packet-based network, presently allows PSTN subscribers to communicate with packet-based network users and vice versa.
  • a gateway which permits the interconnection between the packet-based network and the PSTN
  • a gatekeeper used for the routing of the H.323-based calls
  • a terminal which provides the users of a packet-based network (e.g., Internet) a device similar to a regular telephone.
  • the H.323 protocol allows multiple types of addresses for each user. For example, the following address types are common: (a) an H.323 Alias, corresponding to a symbolic name given to a particular H.323 terminal; (b) a transport address, corresponding to the LP address of the host where the H.323 terminal is located; and
  • an E.164 number which is simply a phone number associated with the H.323 terminal.
  • the gatekeeper supervises all the calls delivered through the LP network, and as part of its functionality, it facilitates the matching of the terminal's E.164 number with the LP address of the host where the terminal is located. Because the LP addresses are necessary for establishing communication between different hosts on the LP network, all H.323 terminals are required to register with the gatekeeper in order to place and receive calls using their E.164 numbers.
  • the H.323 gateway connects a telephone switching center (for example, the PSTN switching center or a cellular switching center) to the LP network.
  • a telephone switching center for example, the PSTN switching center or a cellular switching center
  • the H.323 GW preferably covers all the telephone numbers which start with a particular E.164 prefix, and accordingly, when the H.323 GW is registered at the H.323 gatekeeper with its E.164 prefix, the gatekeeper routes calls with that E.164 prefix towards the appropriate telephone switching center.
  • both an H.323 terminal and the H.323 GW register or unregister at the gatekeeper when they are powered up or down, respectively.
  • H.323 gateway and then through the home MSC associated with the mobile subscriber.
  • trunks From there, trunks have to be seized to the serving MSC where the mobile subscriber is visiting. Accordingly, as set forth in the Background section of the present patent application, the requirement of establishing inter-MSC trunks defeats the fundamental purpose of using and integrating the LP network in cellular environments.
  • the WLLP network 102 may include other entities such as, for example, H.323 terminals, a Multipoint Controller Unit (MCU), and additional gateways and gatekeepers.
  • MCU Multipoint Controller Unit
  • HLR Home Location Register
  • the MT 112 is registered at a Visitor Location Register (VLR) 304 associated with the serving MSC 302.
  • VLR Visitor Location Register
  • the serving MSC 302 and its associated VLR Visitor Location Register
  • VLR 304 together form the MT's serving system.
  • the serving MSC then initiates the registration of the MT with respect to the VoLP network 108.
  • An ANSI-41 private message is provided in accordance herewith for the purpose of IP-network registration.
  • the ANSI-41 private message for IP-network registration including a parameter called RegUpdate, is transmitted by the serving MSC 302 via path 310 to an H.323 GW 116 associated therewith.
  • the RegUpdate parameter preferably contains the MT's registration information.
  • the GW 116 Upon receiving the ANSI-41 private message, the GW 116 translates the information therein into an H.323 Registration Access and Status (RAS) message called Registration Request (RRQ), which is transmitted via path 308 to a H.323 mobility server 306.
  • RAS Registration Access and Status
  • RRQ Registration Request
  • the RegUpdate parameter contained in the RAS RRQ message is used by the mobility server 306 for the purpose of the MT's registration in a database associated therewith.
  • RASRCF Registration Confirm
  • RAS RRJ Reject
  • the return message path from the mobility server 306 is labeled with reference numeral 318 in FIG. IB. Consequently, upon receiving the return message from the mobility server 306, the GW 116 sends an ANSI-41 return message via path 316, which includes a RegUpdate Return Result, to the serving MSC 302. It should be understood that the RegUpdate Return Result contains an appropriate parameter corresponding to the H.323 answer (i.e., the RCF or RRJ message).
  • FIGS. 2 A and 2B depict a presently preferred exemplary embodiment of an unregistration process for a mobile terminal that is registered at the mobility server 306 in accordance herewith.
  • standard ANSI-41 signaling is used via path 404 for informing the HLR 298 about the MT's unregistration at the cellular infrastructures.
  • the VLR 304 may be conventionally notified of the MT's location update information.
  • the unregistration process at the IP-network 108 is facilitated by sending an ANSI-41 private message containing the RegUpdate parameter from the MSC 302 to the GW 116.
  • the message path 406 in FIG. 2A illustrates this ANSI-41 private message for unregistration.
  • the GW 116 may translate the information therein into a suitable H.323 RAS Unregistration Request (RAS URQ) message which is sent via path 408 to the mobility server 306.
  • RAS URQ RAS Unregistration Request
  • the mobility server 306 processes the parametric information appropriately and updates its location database/directory, if necessary (i.e., the entry relating to the departing MT is deleted). Thereafter, it sends an appropriate return message, either a RAS Unregistration Confirm (RAS UCF) or a RAS Unregistration Reject (RAS URJ), to the GW 116.
  • a suitable ANSI-41 response message is then forwarded from the GW 116 to the serving
  • these return/response messages are labeled as paths 410 and 412, respectively.
  • the RegUpdate parameter in the ANSI-41 private message for dual registration comprises a 50-octet structure.
  • the encoding of some of the relevant octets is provided as follows. Octets 1 and 2 are used for the sending individual's information. Octets 9-14 encode the MT's E.164 number. Electronic Serial Number (ESN) of the MT is encoded in octets 15-18. The Location Area Code values are provided in octets 19-20. Registration Type and Capability Report Indicator values are encoded in octets 43-44.
  • the RegUpdate Return Result parameter is presently provided as a 10-octet structure. Octets 7-8 are encoded with the registration result, and octets 9 and 10 are encoded with Capability Report Status information.
  • the translation of the ANSI-41 private messages into iMSmessages maybe provided as optional, if the mobility server 306 is supported with an ANSI-41 interface. In that case, there is no need for the translated
  • the GW 116 may simply forward the ANSI-41 private messages to the mobility server 306 for registration/unregistration.
  • the mobility server 306 preferably acts as a H.323 gatekeeper or as a location server within the LP network 108. Accordingly, when a particular gatekeeper in the LP network 108 does not know the called party's location (that is, its database does not have a E.164 ⁇ transport address translation for the called number), it inquires through suitable H.225 messages (namely, the Location Request, Location Confirm and Location Reject (LRQ/LCF/LRJ) messages) sent to its neighborhood gatekeepers and the mobility server 306 about the location of the called party. The mobility server 306 then responds with the transport address of the GW in its LCF return message.
  • suitable H.225 messages namely, the Location Request, Location Confirm and Location Reject (LRQ/LCF/LRJ) messages
  • the database of the mobility server may keep track of multiple registrations of mobile terminals in a manner similar to the location registration process of a VLR.
  • the mobility server's database preferably uses the E.164 number as a key for its internal database or location directory purposes.
  • FIGS.3 and 4 depicted therein are control message pathways for implementing a call setup method for an MT that is registered at the mobility server 306 in accordance herewith. More particularly, FIG. 3 depicts a control message pathway for a call scenario wherein the call is originated by an MT 112.
  • the serving MSC 302 When a call intended for an H.323 terminal 284 is initiated by the MT 112 (path 508), the serving MSC 302 sends an appropriate ANSI-41 or a Primary Rate Interface (PRI) setup message 510 to the GW 116. In response thereto, the GW 116 sends an ANSI-41 or a Primary Rate Interface (PRI) setup message 510 to the GW 116.
  • PRI Primary Rate Interface
  • Admission Request (ARQ) message 512 to the H.323 gatekeeper 278.
  • An LRQ message 514 is generated by the gatekeeper in order to query the mobility server 306 for the address of the H.323 terminal 284.
  • an LCF message 516 is returned from the mobility server 306 with the appropriate location information to the gatekeeper 278, which then sends its own Admission Confirm (ACF) message 518 to the GW 116.
  • a Q.931 interface 520 is then set up between the GW 116 and the H.323 terminal 284 which in turn negotiates for Admission Request with the gatekeeper 278 via path 522.
  • a location inquiry process also referred to as "Endpoint Location”
  • the H.323 terminal 284 receives an
  • ACF return message 528 from the gatekeeper 278 Thereafter, a call path 530 from the MT 112 to the terminal 284 is established such that the call can proceed therefrom.
  • FIG. 4 illustrates the call scenario wherein the MT 112 is the called party and the H.323 terminal 284 is the caller. It should be apparent that the control messages shown herein are similar to those illustrated in the description set forth above. Analogous to the situation where the MT is the caller, the mobility server 306 is engaged in a two-stage inquiry process, first with the gatekeeper 278 (upon call origination) and then with the GW 116 (for cellular connectivity). Once the ANSI-41 or PRI setup is effectuated between the GW 116 and the MT 112 via the serving MSC
  • the call path 624 is established between the parties.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un système et un procédé de réalisation d'un schéma d'enregistrement double d'un terminal (112) mobile dans un réseau (102) de télécommunication sans fil doté d'une partie de réseau cellulaire et d'une partie (108) de réseau de commutation par paquets. Dès qu'il détecte le déplacement ou la mise en marche du terminal mobile dans la zone de service associée à un système de service, le système de service commence à enregistrer le terminal mobile dans l'infrastructure cellulaire. Ensuite, le système de service met en place une messagerie appropriée via une passerelle (116) disposée entre les parties de réseau cellulaire et de commutation par paquets en direction d'un serveur (306) de mobilité disposé dans le réseau de commutation par paquets, afin de faciliter l'enregistrement du terminal mobile dans le réseau. Le serveur de mobilité comprend un répertoire de mise à jour des informations de localisation du terminal mobile en fonction de son enregistrement ou de son non-enregistrement dans le réseau de commutation par paquets. Ainsi, lorsqu'un terminal mobile reçoit un appel alors qu'il se trouve dans une zone de service visitée ou dans une zone de service locale, l'appel est acheminé grâce aux informations d'enregistrement dans le serveur de mobilité, ce qui élimine la nécessité d'établir une liaison entre centrales du service mobile.
EP99963740A 1998-12-03 1999-11-23 Systeme et procede d'enregistrement de terminal mobile dans un reseau integre a commutation par paquets sans fil Withdrawn EP1135906A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US11081198P 1998-12-03 1998-12-03
US110811P 1998-12-03
US42747199A 1999-10-26 1999-10-26
US427471 1999-10-26
PCT/SE1999/002165 WO2000033523A1 (fr) 1998-12-03 1999-11-23 Systeme et procede d'enregistrement de terminal mobile dans un reseau integre a commutation par paquets sans fil

Publications (1)

Publication Number Publication Date
EP1135906A1 true EP1135906A1 (fr) 2001-09-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP99963740A Withdrawn EP1135906A1 (fr) 1998-12-03 1999-11-23 Systeme et procede d'enregistrement de terminal mobile dans un reseau integre a commutation par paquets sans fil

Country Status (4)

Country Link
EP (1) EP1135906A1 (fr)
AU (1) AU2011300A (fr)
CA (1) CA2353626A1 (fr)
WO (1) WO2000033523A1 (fr)

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WO2001076276A2 (fr) * 2000-04-05 2001-10-11 Telefonaktiebolaget Lm Ericsson (Publ) Reseau de telecommunications integrant des infrastructures cellulaires, de commutation de paquets et de voix sur ip
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KR100369803B1 (ko) * 2001-03-10 2003-02-05 삼성전자 주식회사 무선통신 네트워크의 패킷 음성 호 서비스 방법 및네트워크 구조
US20030012162A1 (en) * 2001-07-16 2003-01-16 Subrata Mukherjee Terminal agent representing wireless terminals in a voice over IP communication network
WO2003001836A1 (fr) 2001-06-20 2003-01-03 Nokia Corporation Systeme, dispositif et procede de transfert des appels dans un mode de souscription double
WO2006048925A1 (fr) * 2004-11-02 2006-05-11 Fujitsu Limited Méthode de relais de communication, programme de relais de communication et appareil de relais de communication
CN100596084C (zh) * 2006-04-20 2010-03-24 华为技术有限公司 移动电路域用户接入ims网络的系统及其接入的注册方法
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Publication number Publication date
WO2000033523A1 (fr) 2000-06-08
AU2011300A (en) 2000-06-19
CA2353626A1 (fr) 2000-06-08

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