WO2002093966A1 - Procede de synchronisation d'une pluralite de reseaux - Google Patents

Procede de synchronisation d'une pluralite de reseaux Download PDF

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Publication number
WO2002093966A1
WO2002093966A1 PCT/EP2002/005307 EP0205307W WO02093966A1 WO 2002093966 A1 WO2002093966 A1 WO 2002093966A1 EP 0205307 W EP0205307 W EP 0205307W WO 02093966 A1 WO02093966 A1 WO 02093966A1
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WO
WIPO (PCT)
Prior art keywords
msc
switching means
type switching
type
mobile communication
Prior art date
Application number
PCT/EP2002/005307
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English (en)
Inventor
Konrad Feyerabend
Rolf Hansson
Kathrin Homann
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
Publication of WO2002093966A1 publication Critical patent/WO2002093966A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/25—Maintenance of established connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • 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 invention addresses the field of mobile communications.
  • the invention relates to a method for synchronization of at least a first type cellular network with a second type cellular network, wherein the first type cellular network comprises at least one first type switching means and the second type cellular network comprises at least one second type switching means, wherein a mobile communication means is located in a cell of the first type cellular network, the mobile communication means being associated with the second type switching means, and wherein the second type switching means is associated with the first type switching means for enabling the first type switching means to provide first type services to the mobile communication means while associated with the second type switching means.
  • the invention relates to a network node element of a communication network, a communication network, a computer program, and a machine- readable medium.
  • a system for mobile communications comprises as a first wireless network the Japanese “Personal Digital Cellular” (PDC), also called “Pacific Digital Cellular”, network , and a second wireless network according to a packet extension of the PDC standard, called “Packet Personal Digital Cellular” (PPDC) network.
  • PDC Personal Digital Cellular
  • PPDC Packet Personal Digital Cellular
  • the radio interface is defined by the known RC -STD 27 standard, version H, of the Association of Radio Industries and Businesses (ARIB).
  • the Personal Digital Cellular standard is used in Japan to provide a wireless network, called “Personal Digital Cellular” network designed for circuit switched connections that can handle voice calls as well as short message services (SMS) messages.
  • SMS short message services
  • MSC mobile services switching center
  • CMSC circuit switched mobile services switching center
  • TCH traffic channels
  • PCH paging channel
  • SCCH signaling control channel
  • the Personal Digital Cellular network comprises at least one of the above described mobile services switching center (MSC) that serves a plurality of cells of the network wherein each cell comprises a base station system (BSS).
  • the mobile services switching center provides functions for switching, call set up, circuit- switched charging, service provisioning etc.
  • the mobile services switching center controls the base station system and stores information about the location of a mobile station in the case where the location is covered by the network.
  • a mobile station of a Packet Personal Digital Cellular system is able to send or receive Internet protocol based data traffic over a dedicated channel, called packet communication physical channel (PPCH).
  • PPCH packet communication physical channel
  • the mobile services switching center is not in- formed about the traffic on this packet communication physical channel.
  • the layer 2 and layer 3 interface for the packet communication physical channel is terminated in a packet mobile services switching center for handling packet connections only.
  • the packet mobile services switching center is connected to the packet communication physical channel in a number of cells of the cellular network.
  • the Packet Personal Digital Cellular standard the known system for mobile communications implements wireless packet data services for the mobile station by providing Internet protocol (IP) communication between the mobile station and an application server that offers internet-based content to mobile subscribers.
  • IP Internet protocol
  • the system is adapted to a transmission of packet switched data in that the system comprises the packet mobile services switching center that handles the packet data switching functionality between the mobile station and the application server.
  • the packet mobile services switching center provides Internet protocol based connectivity to the mobile station by assigning an Internet protocol address to the mobile station if the mobile station requests set up of a packet data session to the application server.
  • the packet mobile services switching center routes and forwards incoming and outgoing Internet protocol packets addressed to/from the mobile station.
  • the packet mobile services switching center sets up an association to the circuit mobile services switching center.
  • the circuit mobile services switching center is able to offer circuit services to the mobile station even though the mobile station is in packet state. This association is cleared when the mobile station deregisters from the packet mobile services switching center.
  • a mobile station can switch between all channels without having any knowledge about the network architecture. Different channels may be controlled by different nodes. In some cases the mobile station switches from one channel to another channel, each controlled by a different node, without informing one of the controlling nodes. In theses cases, at least temporarily an inconsistency regarding data related to the mobile station can arise in the network. This inconsistency can result, e.g. in a refusal of a registration request of the mobile station, incorrect charging, or incorrect administration.
  • the problem underlying the invention is to improve the consistency of system data regarding the mobile station in relation to either network comprised in the system for mobile communication.
  • a method for synchronization of a first type cellular network with at least a second type cellular network comprising the steps: receiving an event signal related to the mobile communication means, determining the association of the mobile communication means with the second type switching means, - providing an indication signal from the first type switching means to the second type switching means, triggered by the event signal and suitable for enabling clearance of the determined association of the mobile communication means with the second type switching means.
  • association not only comprises the case where the mobile communication means actually communicates with the second type switching means, but also comprises the case where the mobile communication means is ready for communication with the second type switching means, however, without any communication actually taking place.
  • the second type switching means is associated with the first type switching means; this in- eludes the case where the second type switching means is ready for communication with the first type switching means.
  • this event signal comprises information such as a synchronization request, a traffic channel paging request, or a location registration request.
  • determining means, in particular, to obtain and/or to provide information on whether the mobile communication means is associated with any second type switching means, and, if so, identify the second type switching means that is subject to this association.
  • this indication signal requests clearance of the determined association at the second type switching means.
  • the second type switching means clears the determined association on receipt of the indication signal alone.
  • the inventive method comprises the step of clearance of the determined association of the mobile communication means with the second type switching means.
  • Clearance of the association modifies the status of the second type switching means, i.e. for example entries in its database, such that it reflects the status of the mobile communication means.
  • services such as charging, resource supervision, and/or delivery of a page request over a paging channel or over a packet paging channel can work correctly.
  • the inventive method comprises the step of clearance of the association of the the first type switching means with the second type switching means in the case where this association is no longer needed.
  • the received event signal comprises set up and/or synchronization information for a first mode communication between the first type switching means and the mobile communication means.
  • This information may be of particular relevance to the status of the mobile communication means.
  • the first type switching means informs the second type switching means in the case where the first type switching means has received an indication that the mobile communication means changed its relation to the network such as location and/or status. In this case, the mobile communication means may not have informed the second type switching means, e.g. the mobile communication means may not have performed any deregistration from the second type switching means.
  • the indication to remove an entry related to the mobile communication means from the second type switching means is sent from the first type switching means to the second type switching means in specific, i.e., predetermined error cases as well as, or in cases where correct traffic is concluded.
  • the indication is sent from the first type switching means to the associated second type switching means and results there in the removal of the mobile station entry unless the second type switching means "knows" better, i.e. unless the second type switching means has information to the contrary and overrides the indication.
  • the received event signal is a location registration request signal of the mobile communication means.
  • the location registration request signal of the mobile communication means to the first type switching means is useful for the indication of the location of the mobile communication means because the location registration request signal provides information on the location of the mobile communication means; in fact, the location information may be implicit in that the location of the first type switching means that receives the registration request signal implies the location of the mobile communication means that sent the registration request signal.
  • the mobile communication means may, for example, have moved from one cell to another cell of the cellular network.
  • the regis- tration request signal provides the information related to the new location of the mobile communication means to the first type switching means.
  • the received event signal is a location erasure request signal.
  • the location erasure request signal of the mobile communication means sent to the first type switching means is particularly useful for the indication of the location of the mobile communication means because the location erasure request signal provides information on the location of the mobile communication means, i.e., where the mobile communication means is not located.
  • the mobile communication means may, for example, have moved from one cell to another cell of the cellular network.
  • the location erasure request signal provides the information that is related to the old location of the mobile communication means to the first type switching means, i.e. that the old location is no longer the actual location of the mobile communication means. This information is useful because knowing where the mobile communication means is not any longer enables the system to avoid "lose ends", i.e.
  • the location erasure request signal implies invalidity of the association of the mobile communication means with the second type switching means such that the first type switching means is able to lift, i.e., to remove this association.
  • this further association of the mobile communication means with the first type switching means is cleared.
  • the first type switching means ceases to control the mobile communication means, and the second type switching means is able to take control of the mobile commu- nication means.
  • a network node element of a communication network system wherein the network node element is adapted to perform the inventive method as described above.
  • the network node element comprises a switching means.
  • the network node element is provided with the first type switching means.
  • the network node element is provided with the second type switching means.
  • the communication network system may comprise a plurality of network node elements provided with switching means of either type.
  • the communication network system may be provided with two network node elements, one being provided as the first type switching means, and the other being provided as the second type switching means.
  • the switching means of the network node element is provided as an integrated switching means, in particular a physically integrated switching means, that comprises the first type switching means as well as the second type switching means.
  • the integrated switching means is particularly compact, and controlling and maintenance of this switching means are thus particularly convenient.
  • the differentiation between the switching means provided in the integrated switching means can be based on a logical difference between the first type switching means and the second type switching means.
  • the first type switching means is provided as a circuit switching means, in particular as a circuit switching circuit mobile services switching center.
  • the second type switching means is provided as a packet switching means, in particular as a packet switching packet mobile services switching center.
  • a network node of a communication network that comprises at least one of the aforementioned network node elements.
  • a cellular communication network that comprises at least one inventive network node element as described above.
  • a computer program is provided that is loadable into an internal memory of a digital processing unit and comprises software code portions adapted to control the steps according to the inventive method claims, when the computer program is executed on the digital processing unit.
  • the invention is realized by software.
  • the computer program is stored on a machine-readable medium, in particular a computer-readable medium.
  • a machine-readable medium that comprises the inventive computer program.
  • the medium may, e.g., be a compact disc read only memory (CD ROM), a floppy disc, an optical disc such as a digital video disc (DVD), or a hard disc.
  • Embodiments of the invention can be used in any communication system as de- fined by the Third Generation Partnership Project (3 GPP) in the release of 1999 as well as in all future releases thereof, in Universal Mobile Telecommunications System (UMTS) networks, in Personal Digital Cellular (PDC) and/or Packet Personal Digital Cellular (PPDC) networks, Global Standard for Mobiles (GSM) networks, core networks, wireless local area networks (WLAN), and the corre- sponding network provider equipment and/or user equipment.
  • 3 GPP Third Generation Partnership Project
  • UMTS Universal Mobile Telecommunications System
  • PDC Personal Digital Cellular
  • PPDC Packet Personal Digital Cellular
  • GSM Global Standard for Mobiles
  • WLAN wireless local area networks
  • corre- sponding network provider equipment and/or user equipment the corre- sponding network provider equipment and/or user equipment.
  • Fig. 1 is a schematic representation of a system for mobile communications according to the invention
  • Fig. 2 shows a first signaling sequence comprising a set up of an association between two mobile services switching centers
  • Fig. 3 shows a second signaling sequence comprising a synchronization of a mobile station with a circuit mobile services switching center
  • Fig. 4 shows a third signaling sequence comprising a location registration of the mobile station at a first circuit mobile services switching center
  • Fig. 5 shows a fourth signaling sequence comprising a location registration of the mobile station at a second circuit mobile services switching center.
  • the embodiment of the invention relates to of a system for mobile communications that comprises a Personal Digital Cellular (PDC) network and a Packet Personal Digital Cellular (PPDC) network.
  • the Personal Digital Cellular network is designed for circuit switched connections and can handle voice calls as well as short message services (SMS) messages.
  • SMS short message services
  • the Packet Personal Digital Cellular network is adapted to a transmission of packet switched data and handles Internet protocol (IP) communication between a mobile station and, for example, an application server that offers Internet-based content, or other packet-based communication services such as Voice Over IP, e-mail or a gateway connection to the out- side Internet etc., to mobile subscribers.
  • IP Internet protocol
  • Fig. 1 schematically shows elements of the system for mobile communications using cellular networks.
  • the network comprises several geographic cells C that form a cell cluster.
  • a base station BS comprising radio re- sources for transmission of radio signals such as a transceiver and an antenna AA
  • the base station's antenna AA can send and/or receive radio signals to enable transmission of the signals from the base station BS to a mobile station MS disposed in the cell C where the an- tenna AA is located.
  • the mobile station MS serves as a mobile communication means for a subscriber to circuit switched services and/or to packet switched services.
  • the mobile station MS may, for example, be provided as shown in fig. 1 as a cellular telephone, or as a personal digital assistant (PDA), a laptop computer adapted to communicate with a mobile telecommunication network, and so forth.
  • PDA personal digital assistant
  • the mobile station MS can receive signals from the antenna AA and the mobile station MS can send signals to the antenna AA.
  • the cluster of cells C as shown in fig. 1 forms an area, called terminal registration area, that is served by one circuit mobile services switching center C-MSC of the Personal Digital Cellular (PDC) network. Furthermore, the cells C of this terminal registration area are also served by one packet mobile services switching center P-MSC of the Packet Personal Digital Cellular (PPDC) network.
  • PDC Personal Digital Cellular
  • terminal registration areas of the Personal Digital Cellular network and of the Packet Personal Digital Cellular network are not necessarily identical and while, for example, most cells of a terminal registration area of the packet mobile services switching center P-MSC are also comprised in one terminal registration area of a first circuit mobile services switching center C-MSC 1, some cells of the terminal registration area of the packet mobile services switching center P-MSC can belong to at least one other terminal registration area of a second circuit mobile services switching center C-MSC2. However, all cells C shown in fig. 1 belong to one terminal registration area of the circuit mobile services switching center C-MSC and to one terminal registration area of the packet mobile services switching center P-MSC.
  • the circuit mobile services switching center thus serves a plurality of cells C and provides functions for switching, call set up, circuit-switched charging, service provisioning etc.
  • the circuit mobile services switching center C-MSC controls the base station BS and stores information about the location of the mo- bile station MS in the case where the mobile station MS is located in the terminal registration area.
  • the packet mobile services switching center P-MSC handles the packet data switching functionality between the mobile station MS and an application server (not shown) that provides Internet based content.
  • the packet mobile services switching center P-MSC provides Internet protocol based connectivity by assigning an Internet protocol (IP) address to the mobile station MS if the mobile station MS requests set up of a packet data session to the application server.
  • IP Internet protocol
  • the packet mobile services switching center P-MSC routes and forwards incoming and out- going Internet protocol packets addressed to or from the mobile station MS.
  • fig. 2 a first signaling sequence is shown wherein an association between the packet mobile services switching center P-MSC and the circuit mobile services switching center C-MSC is set up.
  • the mobile station MS uses a packet communication physical channel PPCH to send a registration request signal 1 to the packet mobile services switching center P-MSC.
  • the packet mobile services switching center P-MSC cannot directly reply to the request signal 1 but first has to ask the circuit mobile services switching center C-MSC to check a packet data subscription information regarding the mobile station MS and to provide, for example, subscriber authentication information to the packet mobile services switching center P-MSC. Therefore, the packet mobile services switching center P-MSC sends a request signal 2 to the circuit mobile services switching center C-MSC requesting set up of an association between the packet mobile services switching center P-MSC and the circuit mobile services switching center C-MSC.
  • the circuit mobile services switching center C-MSC sets up the requested association and sends an acknowledgement signal 3 to the packet mobile services switching center P-MSC.
  • the packet mobile services switching center P-MSC registers the mobile station MS.
  • the packet mobile services switching center P-MSC sends a communication response signal 4 to the mobile station MS and thus opens a packet data session with the mobile station MS such that the mobile station MS is associated with the packet mobile services switching center.
  • the association between the packet mobile services switching center P-MSC and the circuit mobile services switching center C-MSC is kept.
  • an indication to remove an entry of a mobile station MS in a packet mobile services switching center P-MSC is sent from a circuit mobile services switching center C-MSC.
  • the trigger for sending the indication is that the circuit mobile services switching center C-MSC receives an event signal that is related to the mobile station MS and that the circuit mobile services switching center C-MSC has an association to the packet mobile services switching center P-MSC for this mobile station MS.
  • the indication is sent to the associated packet mobile services switching center P-MSC and results there in a removal of the mobile station MS entry, if no better information is available in the packet mobile services switching center P-MSC.
  • the circuit mobile services switching center C- MSC receives a paging message indicating a voice call and therefore, using the packet physical channel PPCH because the mobile station MS is in packet mode, sends a paging request signal 1 1 to the mobile station MS.
  • the mobile station MS at (E) accepts the page request for the voice call and responsively sends a set up and synchronization request signal 12 to the circuit mobile services switching center C-MSC, however, now using the circuit switched traffic channel TCH for the synchronization. Therefore, at this point, the packet mobile services switching center P-MSC does not obtain the information that the mobile station ceases the packet data session and hence keeps, for example, a session entry of this session in the memory of the packet mobile services switching center.
  • the circuit mobile services switching center C-MSC receives the request signal 12 from the mobile station MS and the voice call can proceed.
  • the mobile station MS releases the connection between the circuit mobile services switching center C-MSC, however the mobile station MS does not return to the packet data session, i.e., the mobile station MS does not resynchronize on the packet physical communication channel PPCH.
  • the circuit mobile services switching center C-MSC determines the association of the mobile station MS with the packet mobile services switching center P-MSC, i.e., the circuit mobile services switching center C-MSC detects the association of the mobile station MS with the packet mobile services switching center P-MSC that corresponds to the packet data session as explained above with reference to fig. 1 and, moreover, identifies the associated packet mobile services switching center P-MSC.
  • the circuit mobile services switching center C-MSC sends a deregistration request signal 13 to the identified packet mobile services switching center P-MSC.
  • the circuit mobile services switching center C-MSC removes the association with the packet mobile services switching center P-MSC.
  • the packet mobile services switching center P-MSC evaluates the information comprised in the deregistration request signal 13, concludes that the association with the mobile station MS that was used for the packet data session of the mobile station MS with the packet mobile services switching center P-MSC is now any longer required because the mobile station is busy in circuit switched mode and, consequently, the packet mobile services switching center P-MSC removes this association and thus releases resources for example to use for packet data sessions with another mobile station thereby, as far as the mobile station MS is concerned, achieving consistency throughout the system.
  • the mobile station MS has lost a connection, i.e. an association, previously established between the mobile station MS and the packet mo- bile services switching center P-MSC.
  • the mobile station MS had a packet data session with the packet mobile services switching center P-MSC and this session was lost due to an empty battery.
  • the mobile station MS recovers power, for example after connecting the mobile station MS to a power supply, the mobile station MS sends a location registration request signal 21 using a sig- naling control channel SCCH.
  • the circuit mobile services switching center C-MSC receives the location registration request signal 21. Triggered by the location registration request signal 21 received on the signaling control channel SCCH, after an authentication signal exchange (not shown in fig.
  • the circuit mobile services switching center C-MSC de-tects an association of the mobile station MS with the packet mobile services switching center P-MSC, wherein that association relates to the lost packet data session. Moreover, the circuit mobile services switching center C-MSC identifies the associated packet mobile services switching center P-MSC. The circuit mobile services switching center C-MSC sends a deregistration request signal 22 to the identified packet mobile services switching center P-MSC. At (L), the circuit mobile services switching center C-MSC removes the association with the packet mobile services switching center P-MSC.
  • the circuit mobile services switching center C-MSC sends a location registration acknowledgement signal 23 to the mobile station MS to indicate the registration of the mobile station MS with the circuit mobile services switching means C-MSC.
  • the packet mobile services switching center P-MSC evaluates the information comprised in the deregistration request signal 22, concludes that the association with the mobile station MS, that was used for the packet data session of the mobile station MS with the packet mobile services switching center P-MSC, is now any longer required because the mobile station MS is now registered with the circuit mobile services switching center C-MSC and, consequently, the packet mobile services switching center P-MSC, as requested, removes the association to the mobile station MS and thus releases resources for example to use for packet data sessions with another mobile station thereby, as far as the mobile station MS is concerned, achieving consistency throughout the system .
  • the mobile station MS has lost a connection, i.e. an association, previously established between the mobile station MS and a first packet mobile services switching center P-MSC being associated with a first circuit mo- bile services switching center C-MSC 1.
  • the mobile station MS had a packet data session with the first packet mobile services switching center P-MSC and this session was lost because the mobile station moved out of the terminal registration area of the first packet mobile services switching center P-MSC into a different terminal registration area covered by a different packet mobile services switching center. Consequently, the mobile station MS sends a location registration request signal 31 using a signaling control channel SCCH.
  • a second circuit mobile services switching center C-MSC2 receives the location registration request signal 31.
  • the second circuit mobile services switching center C-MSC2 sends a subscriber data request signal (not shown in fig. 5) to a home location register HLR that stores authentication keys for each subscription to a network operator's packet data service.
  • the home location register HLR provides a subscriber data signal (not shown in fig. 5) to the second circuit mobile services switching center C-MSC2 wherein the subscriber data signal comprises the requested authentication data.
  • an authentication signal exchange not shown in fig. 5 with the mobile station MS, at (Q)
  • the second circuit mobile services switching center C-MSC2 updates its entries such that the mobile station MS is now registered with the second circuit mobile services switching center C-MSC2.
  • the second circuit mobile services switching center C-MSC2 sends a location registration request signal 32 to the home location register HLR for update of the subscriber data stored in the home location register HLR.
  • the home location register HLR provides a location registration reply signal 33 to the second circuit mobile services switching center C-MSC2.
  • the home location register HLR sends an location erasure request signal 34 to the first circuit mobile services switching center C-MSC 1.
  • the first circuit mobile services switching center C-MSC 1 Triggered by the location erasure request signal 34, the first circuit mobile services switching center C-MSC 1 , at (P), detects an association of the mobile station MS with the first packet mobile services switching center P-MSC, wherein that association corresponds to the lost packet data session.
  • the first circuit mobile services switching center C-MSC 1 identifies the associated packet mobile services switching center P-MSC.
  • the first circuit mobile services switching center C- MSC1 sends a deregistration request signal 36 to the identified packet mobile services switching center P-MSC.
  • the first circuit mobile services switch- ing center C-MSC 1 removes the association to the first packet mobile services switching center P-MSC.
  • the first packet mobile services switching center P-MSC evaluates the information comprised in the deregistration request signal 36, concludes that the association with the mobile station MS that was used for the packet data session of the mobile station MS with the first packet mobile services switching center P-MSC is now any longer required and, consequently, the first packet mobile services switching center P-MSC removes, as requested, the association with the mobile station MS and thus releases resources for example to use for packet data sessions with another mobile station thereby, as far as the mobile station MS is concerned, achieving consistency throughout the system.

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

Abstract

L'invention concerne un procédé de synchronisation d'un réseau cellulaire d'un premier type avec au moins un réseau cellulaire d'un deuxième type. Le réseau du premier type comprend au moins un moyen de commutation d'un premier type (C-MSC) et le réseau cellulaire de deuxième type comprend au moins un moyen de commutation d'un deuxième type (P-MSC). Un moyen de communication mobile (MS) est situé dans une cellule du réseau cellulaire du premier type. Le moyen de communication mobile (MS) est associé au moyen de communication du deuxième type (P-MSC), et le moyen de commutation du deuxième type (P-MSC) est associé au moyen de commutation du premier type (C-MSC) pour permettre au moyen de commutation du premier type de fournir des services de premier type au moyen de communication mobile (MS) tout en tant étant associé au moyen de commutation de deuxième type (P-MSC). Ce procédé consiste: - à recevoir un signal événement (21) lié au moyen de communication mobile (MS) ; - à déterminer l'association du moyen de communication mobile (MS) avec le moyen de commutation de deuxième type (P-MSC) ; - à fournir un signal d'indication (22) du moyen de commutation du premier type (C-MSC) au moyen de commutation du deuxième type (P-MSC), déclenché par le signal événement (21) et adapté pour permettre le déclenchement de l'association déterminée du moyen de communication mobile (MS) et du moyen de commutation de deuxième type (P-MSC).
PCT/EP2002/005307 2001-05-14 2002-05-14 Procede de synchronisation d'une pluralite de reseaux WO2002093966A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP01111654.8 2001-05-14
EP01111665 2001-05-14
EP01111654 2001-05-14
EP01111665.4 2001-05-14

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PCT/EP2002/005309 WO2002093945A2 (fr) 2001-05-14 2002-05-14 Procede de fourniture de services de communications

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WO2002093945A2 (fr) 2002-11-21
JP4347576B2 (ja) 2009-10-21

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