WO1997026764A1 - Systeme de communications mobiles numerique et procedes de traitement d'un appel de raccordement - Google Patents

Systeme de communications mobiles numerique et procedes de traitement d'un appel de raccordement Download PDF

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Publication number
WO1997026764A1
WO1997026764A1 PCT/FI1997/000020 FI9700020W WO9726764A1 WO 1997026764 A1 WO1997026764 A1 WO 1997026764A1 FI 9700020 W FI9700020 W FI 9700020W WO 9726764 A1 WO9726764 A1 WO 9726764A1
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WO
WIPO (PCT)
Prior art keywords
mobile communication
mobile
terminal equipment
packet radio
control channels
Prior art date
Application number
PCT/FI1997/000020
Other languages
English (en)
Inventor
Hannu H. Kari
Seppo Huotari
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 AU14459/97A priority Critical patent/AU1445997A/en
Publication of WO1997026764A1 publication Critical patent/WO1997026764A1/fr

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Classifications

    • 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
    • H04W68/12—Inter-network notification
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2203/00—Aspects of automatic or semi-automatic exchanges
    • H04M2203/15—Aspects of automatic or semi-automatic exchanges related to dial plan and call routing
    • H04M2203/156—On-line status dependent routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • 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
    • H04W8/06—Registration at serving network Location Register, VLR or user mobility server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements

Definitions

  • the present invention relates to mobile communication systems to which a packet radio network is connected.
  • General Packet Radio Service GPRS is a new service in the GSM system and it is one of the subjects of standardization of GSM phase 2+ at ETSI (European Telecommunication Standard Institute) .
  • a GPRS operational environment comprises one or more subnetwork service areas which are connected to one another by GPRS Backbone Network.
  • a subnetwork comprises a set of packet data service nodes SN which are herein referred to as serving GPRS support nodes SGSN.
  • Each SGSN is connected to the GSM mobile communication network (typically to base station systems) so that it is able to provide a packet data service for mobile data terminal equipments via several base stations, that is, cells.
  • the intermediate mobile communication network provides packet switched data transmission between support node and mobile data terminal equipments.
  • Different subnetworks are, in turn, connected to an external data network, e.g. to a packet switched public data network PSPDN, via special GPRS gateway support nodes GGSN. Therefore by means of GPRS service the packet data transfer is provided between mobile data terminal equipments and external data networks while the GSM network acts as an access network.
  • GPRS gateway support nodes GGSN special GPRS gateway support nodes
  • GPRS GSM network there may be mobile stations MS (class B and C mobile stations) which may operate both normally in the GSM network and also in the GPRS network.
  • MS class B and C mobile stations
  • the mode of operation in which the mobile station operates in the GPRS network data transmission over a packet- switched connection, the so-called Active state in GPRS terms
  • GSM state data or speech transmission over a circuit-switched connection, the so-called Idle state in GPRS terms
  • the MS transits from the GSM state (Idle) to the GPRS state (Active) by initiating a GPRS Logon procedure and from the GPRS state (Active) to the GSM state (Idle) by initiating a GPRS Logoff procedure.
  • the MS When the MS is in the GPRS state (Active) , it may either actively transmit and receive messages or be "idle".
  • the MS As in the GPRS state the MS is most of the time idle, it may monitor normal GSM paging channels and react to circuit switched mobile terminating calls, for example. It may not be possible to monitor GSM channels during the packet data transmission. Therefore the MS may not be reached.
  • One object of the present invention is to eliminate this problem.
  • the present invention relates to a digital mobile communication system comprising a mobile communication network containing a mobile services switching centre, base station systems, and a subscriber database for maintaining subscriber data and location data of mobile communication network subscribers, a packet radio network containing packet radio support nodes, each of which is connected to the mobile communication network and to one or more of the remaining packet radio support nodes, and at least one gateway support node which provides an access point for an external data network or to another packet radio system, first control channels which are allocated to the use of the mobile communication network in base station systems, second control channels which are allocated to the use of the packet radio network in base station systems, a mobile terminal equipment having a first operating state where it monitors said first control channels, and a second operating state where it monitors said second control channels.
  • the subscriber database of the mobile communication network has information that the mobile terminal equipment is not available via the first control channels when the mobile terminal equipment is in said second operating state.
  • the present invention also relates to methods for processing a mobile-terminating call in a digital mobile communication system
  • a digital mobile communication system comprising a mobile communication network; a packet radio network containing packet radio support nodes, each of which is connected to the mobile communication network which provides a radio interface for the packet radio network; first control channels allocated to the use of the mobile communication network in the radio interface; second control channels allocated to the use of the packet radio network in the radio interface; and a mobile terminal equipment having a first operating state where it monitors said first control channels, and a second operating state where it monitors said second control channels.
  • the first method comprises the steps of: updating in the subscriber database of the mobile communication network information on that the mobile terminal equipment the availability of the mobile terminal equipment via the first control channels is uncertain when the mobile terminal equipment transits to the second operating state, updating in the subscriber database of the mobile communication network information on that the mobile terminal equipment is available via the first control channels when the mobile terminal equipment returns to the first operating state, receiving a mobile-terminating call in the mobile communication network, making an inquiry into said subscriber database, interrupting call set-up or making call forwarding if the subscriber database contains information that the availability of the mobile terminal equipment is uncertain.
  • the second method comprises the steps of: updating in the subscriber database of the mobile communication network information on that the mobile terminal equipment is in the packet radio network and not available via the first control channels when the mobile terminal equipment transits from the first to the second operating state, receiving a mobile-terminating call in the mobile communication network, making an inquiry into said subscriber database, in response to said information in the subscriber database, transmitting a notification to the mobile terminal equipment via the packet radio network that it is about to receive a call in the mobile communication network, the mobile terminal equipment transiting to monitor the first control channels in response to receiving the notification, continuing call set-up in the mobile communication network via the first control channels.
  • the third method comprises the step of: maintaining in the subscriber database of the mobile communication network information on ' that the mobile terminal equipment is capable of operating or authorized to operate in the second operating state, a mobile-terminating call in the mobile communication network, making an inquiry into said subscriber database, in response to the information in said database (HLR) , transmitting a notification of an incoming call to the mobile communication network via the packet radio network to the mobile terminal equipment, the mobile terminal equipment transiting to monitor the first control channels in response to receiving the notification, the call set-up is continued in the mobile communication network via the first control channels.
  • HLR information in said database
  • the basic idea of the present invention is to produce information for the actual mobile communication network on that it is not completely certain that the mobile station is available for conventional calls when the mobile station is in the packet radio state.
  • the mobile communication network is capable of giving the appropriate response (e.g. the mobile station busy or beyond the coverage area) to the calling subscriber and perform a call forwarding for MT calls, for example.
  • the mobile station itself, when transiting to the packet radio state, signals to the mobile communication network that it is not available for conventional mobile communication services.
  • the mobile communication network stores this availability information as normal to the subscriber data.
  • the mobile station When departing from the packet radio state, the mobile station signals to the mobile station that it is available again. This takes place preferably by conventional signalling which can be used in the mobile communication network for this purpose, such as IMSI Detach and IMSI Attach messages in the GSM system.
  • the mobile communication network deduces the status information of the mobile station from that the mobile station logins to a packet radio state in a packet radio subscriber register. In that case the mobile station need not separately signal the information.
  • the subscriber data may contain the reason for being unavailable, that is, the packet radio state.
  • the subscriber database detects that the mobile station is in the packet radio state. Then the subscriber database initiates a notification procedure in the packet radio network. In the notification procedure, the serving packet radio support node transmits on a packet radio channel a message to the mobile station for informing of the MT call in the mobile communication network. Because of this, the mobile station is aware of the incoming MT call and may start to monitor the paging channels of the mobile communication network. The mobile station or the user may have the possibility to choose whether the MT call is to be received or not.
  • Figures 2, 3 and 4 are signalling diagrams illustrating .different methods for updating presence/- absence information of the mobile station in the HLR, and for processing an MT call.
  • the present invention is suitable to be used for management of mobile-terminating (MT) calls in different types of packet radio systems where the mobile station is able to transmit between the mobile station state and the packet radio state where it does not monitor the paging channels of the mobile system or monitors them only occasionally.
  • the invention is particularly suited for use in the implementation of General Packet Radio Service in the pan-European digital mobile communication system GSM (Global System for Mobile Communication) or in similar mobile communication systems, such as DCS1800 and PCN (Personal Communication Network) .
  • GSM Global System for Mobile Communication
  • DCS1800 and PCN Personal Communication Network
  • Figure 1 illustrates the GPRS packet radio network implemented into the GSM system.
  • the basic structure of the GSM network comprises two parts: a base station system BSS and a network subsystem (NSS) .
  • the BSS and the mobile stations MS communicate over radio links.
  • each cell is served by a base station BTS.
  • a set of base stations is connected to a base station controller BSC whose function is to control the radio frequencies and the channels of the BTS.
  • the BSCs are connected to a mobile services switching centre MSC.
  • Specific MSCs are connected to other telecommunication networks, such as public switched telephone network PSTN, and contain gateway functions for incoming calls from the networks and outgoing calls to the networks. These MSCs are known as gateway MSCs (GMSC) .
  • GMSC gateway MSCs
  • the home location register HLR stores the subscriber data of all subscribers of the network permanently or semipermanently, including information on the services the subscriber may have access to, and on the present location of the subscriber.
  • Visitor location register VLR is the other register type.
  • a VLR is generally connected to one MSC but it may, however, serve several
  • VLR Visited Location Register
  • HLR visitor MSC
  • GSM network comprises two serving GPRS support nodes
  • SGSN GPRS gateway support node
  • GGSN GPRS gateway support node
  • SGSN and GGSN are connected to one another by Intra-Operator Backbone Network.
  • the GPRS network may have any number of support and gateway nodes. It may also have so-called home support nodes HGSN although as a rule, the HGSN functions are integrated into the GGSN.
  • Each support node SGSN manages a packet data service in the area of one or more cells in a cellular packet radio network.
  • each support node SGSN is connected to a specific local section of the GSM mobile communication system. This connection is typically made into the mobile services switching centre MSC, but in some situations it may be advantageous to make the connection directly to the base station system BSS, that is, to the base station controllers BSC or to one of the base stations BTS.
  • the mobile station MS in the cell communicates over the radio interface with the base station BTS and further through the mobile communication network with the support node SGSN whose service area the cell belongs to. In principle, the mobile communication network between the support node SGSN and the mobile station MS only transmits packets between these two.
  • the mobile communication network may for this purpose provide either a circuit-switched connection or a transmission of packet-switched data packets between the mobile station MS and the serving support node SGSN.
  • a circuit-switched connection between the mobile station and the support node (Agent) is shown in Finnish Patent Application 934,115.
  • An example of a packet-switched data transfer connection between the mobile station and the support node (Agent) is shown in Finnish Patent Application 940,314. It should be noted that the mobile communication network provides only a physical connection (access network) between the mobile station and the support node SGSN and its exact operation and structure are not of essential significance for the invention.
  • the intra-operator backbone network 10 which inter-connects the operator's equipments SGSN and GGSN, can be implemented by a local network, for example. It is to be noted that it is also possible to implement the operator's GPRS network without an intra-operator backbone network, for example by implementing all the features into one computer, but this modification does not cause any alterations to the principles of call set-up according to the invention.
  • the GPRS gateway support node GGSN inter ⁇ connects the operator to the GPRS network of the other operators of the GPRS network and to data networks, such as Inter-Operator Backbone Network 12, IP network or X.25 network 11.
  • An interworking function IWF may be located between the gateway support node GGSN and other networks.
  • the backbone network 12 between the operators is a network via which the gateway support nodes GGSN may communicate with each other. This communication is required to support GPRS roaming between different GPRS networks.
  • the gateway support node GGSN is also used for storing the location information of the GPRS mobile station.
  • the GGSN also routes mobile-terminating (MT) data packets.
  • the GGSN also contains a database which maps together the network address of the mobile station, e.g. in IP network, in X.25 network, in CLNP network or simultaneously in several of them and the mobile station identifier in the GPRS network.
  • MT mobile-terminating
  • updating is carried out also for the (home) gateway support node GGSN for storing the new visitor support node identifier and the mobile station identifier.
  • the GPRS register GR is used for authenticating the subscribers at the beginning of a GPRS session. It contains a mapping between the packet data protocol (PDP) address (addresses) of the subscriber and the IMSI (International Mobile Subscriber Identity) of the subscriber. In the GSM network the subscriber is identified by means of the IMSI .
  • the GR may be a separate register or it may be preferably integrated into the home location register HLR in the mobile communication system.
  • the HLR/GR is connected via the SS7 (Signalling System 7) to the MSC and the intra-operator backbone network. There may be a direct connection or an SS7 gateway node GATEWAY between the SS7 signalling system and the intra-operator backbone network.
  • the HLR/GR may in principle exchange packet-switched messages with any GPRS node.
  • the communication method of the HLR/GR and the connection between the GPRS network is not, however, essential for the invention.
  • the MS When the MS transits to the GPRS state (where data can be transferred over a packet-switched connec ⁇ tion) , it initiates the GPRS Logon procedure. In the procedure, the MS requests access to the GPRS network and sends its identity IMSI to the serving support node SGSN. The serving SGSN makes an inquiry into the HLR on the basis of the IMSI. The HLR initiates a GSM type of challenge-response authentication in the packet radio network. This includes generation and sending of an authentication triplet to the GPRS network. After authentication, the MS registers as the user of a specified data network (such as 11) and its address. This registration is performed along with the GR.
  • a specified data network such as 11
  • the MS may be either in the GPRS state or in the GSM state (data or speech transmission over a circuit-switched connec ⁇ tion) .
  • the MS transits from the GSM state to the GPRS state by initiating the GPRS Logon procedure and from the GPRS state to the GSM state by initiating the GPRS Logoff procedure.
  • the MS is in the GPRS state most of the time idle, it could still monitor normal GSM pagings (e.g. for setting up a mobile-terminating (MT) speech call) , but it cannot be guaranteed that the MS will receive the paging messages.
  • the GSM network may deduce the presence of a fault situation as the MS should be available according to the subscriber data in the GSM network. The normal situation will not be restored until the MS returns to the GSM state.
  • information is produced in the home location register HLR of the GSM network on that the mobile station is not available for ordinary calls when it transits to the packet radio state.
  • the mobile communication network is able to give an appropriate response (e.g. the mobile station busy or beyond the coverage area) to the calling subscriber and to perform call forwarding in MT calls or to interrupt call set- up.
  • the signalling diagrams of Figures 2 and 3 show an example of two alternative methods for updating presence/absence information of the mobile station in the HLR and for processing an MT call.
  • the MS itself is arranged, before transiting to the packet radio state, to signal to the GSM network that it is not available for conventional mobile services. This takes place e.g. by an IMSI Detach message according to GSM recommendations that is normally used for informing that the MS has departed from the network (e.g. as a result of the mobile station being switched off) . This message does not normally contain information on the reason of absence but it can provided with this information when required.
  • the MS signals an IMSI Detach message on the GSM channel via the base station system BSS to the mobile services switching centre MSC that forwards the IMSI Detach information to the HLR.
  • the HLR updates in the subscriber data that the mobile subscriber (MS) is not available (MS Detached) . After this, the MS performs on the GPRS channel registration to the GPRS network with the GPRS Logon procedure. In this way the MS has transitted from the GSM state to the GPRS state where it monitors primarily or solely GPRS channels.
  • An MT call is received at the MSC from the public switched telephone network, for example.
  • the MSC makes a normal routing data inquiry into the HLR (an HLR inquiry) .
  • the HLR detects from the subscriber data that the MS is not available and signals this information in response to the MSC.
  • the MSC gives an appropriate announcement to the calling subscriber and terminates call set-up or performs a call forwarding, for example.
  • the information on the activated call forwarding and the call forwarding number are obtained in the response of the HLR.
  • the MS terminates the registration to the GPRS network by carrying out a GPRS Logoff procedure on the GPRS channel.
  • the MS signals once more to the GSM network that it is available again. This takes place by an IMSI Attach message according to the GSM recommendation, for example.
  • the MS sends an IMSI Attach message on the GSM channel via the base station system BSS to the MSC which forwards the IMSI Attach information to the HLR.
  • the HLR updates in the subscriber data information on that the mobile subscriber (MS) is available (MS Attached) .
  • the MT calls received after that are processed as in normal call set-up in the GSM system.
  • absence information is produced in the HLR in another way which does not require that the MS signals separately the information on GSM channels. Instead, the HLR receives information via the GPRS network. There are several alternatives for this, some of which are shown in the following.
  • the MS itself signals the information directly to the HLR in a data packet (GPRS IMSI Attach, GPRS IMSI Detach) .
  • the MS signals the information to the SGSN
  • the MS signals the information to the SGSN (e.g. GPRS Logon, GPRS Logoff) which informs it further to the GR and the GR to the HLR.
  • the SGSN e.g. GPRS Logon, GPRS Logoff
  • the MS signals the information to the SGSN (e.g. GPRS Logon, GPRS Logoff) which informs it further to the GR.
  • the HLR makes an inquiry into the GR in the case of an MT call on subscribers capable of transiting to the GPRS state.
  • the SGSN detects that the MS has departed from the GPRS state (e.g. because it does not acknowledge the transmitted data packets) . This kind of situation may arise when the battery of the MS runs out before it has time to signal its departure.
  • the SGSN signals the information to the HLR or to the GR as in steps 2 to .
  • any other method may be used by means of which the HLR obtains information from the GPRS on the MS registering in or out .
  • the signalling diagram of Figure 3 illustrates more exactly one method for producing the MS presence/absence information in the HLR by GPRS Logon and Logoff procedures, and for processing an MT call.
  • the MS When transiting from the GSM state to the GPRS state, the MS registers into the GPRS network by the GPRS Logon procedure. This includes an authentication procedure in which the HLR (and/or GR) participates, as well. It may be deduced from this authentication procedure that the MS has assumed the GPRS state and it is no longer available for normal GSM services. As a result of this, the HLR updates in the subscriber data that the mobile subscriber (MS) is not available (MS Detached) and possibly the reason (GPRS Logon) as well.
  • the MSC makes an HLR inquiry and receives in response "the MS not available" as in the case of Figure 2.
  • the MS registers from the GPRS network by a Logoff procedure in which the SGSN and the GGSN are signalled that they can delete their information relating to the MS.
  • the GSM informs either directly the HLR or then the GR which, in turn, informs the HLR.
  • the HLR updates in the subscriber data that the mobile subscriber (MS) is again available (MS Attached) .
  • FIG 4 is a signalling diagram illustrating the third embodiment of the invention where the MS is transmitted information via the GPRS network on that the MS is about to receive an MT call in the GSM network.
  • the MS first registers into the GPRS network by the GPRS Logon procedure, whereby the HLR is updated information on that the MS is not available via normal GSM paging channels because it is in the GPRS state.
  • This procedure is similar to what was explained above in connection with Figure 3.
  • any method can be used with which information is updated in the HLR on that the MS is in the GPRS network.
  • the MSC receives an MT call from the PSTN to said MS.
  • the MSC makes a normal routing information inquiry into the HLR.
  • the HLR detects in the subscriber data that the MS is registered into the GPRS network. As a result of this information, the HLR informs the MS via the GPRS network that the MS is about to receive a paging via the GSM channels. This notification may be transmitted in several different ways, some of which will be explained in more detail below.
  • the HLR sends a notification to the MS via the GPRS network that it is receiving an MT call on GSM channels. This may be carried out when the HLR has information or it receives information by an inquiry made into the GPRS network that the MS is in the GPRS network.
  • the HLR may also send via the GPRS network information on the MT calls whenever the MS has a right to GPRS services, regardless of whether the MS is in the GPRS network or not. In that case the HLR does not need presence/absence information but it is only in the GPRS network as normal. If the MS is not in the GPRS network, the GPRS network cannot forward the notification but it will be "lost". If the MS is in the GPRS network, the network transmits the notification to the destination. In both cases the GSM has continued call set-up on GSM channels.
  • the HLR also contains the address of the support node that serves the MS.
  • the HLR with a connection to the GPRS support nodes may send to the serving support node a data packet informing of the incoming call.
  • the HLR may send to the gateway support node a data packet with the MS data network address or some general address on the basis of which the GGSN can route the data packet to the service support node SGSN.
  • the address has to be stored in the HLR or the HLR has to be able to retrieve it by a GR inquiry.
  • the HLR informs the GR of an incoming call to a specific IMSI, whereby the GR generates and transmits a data packet (containing the notification according to the invention) provided with the MS data network address to the service support node SGSN either directly or via the gateway support node GGSN.
  • a data packet (containing the notification according to the invention) provided with the MS data network address to the service support node SGSN either directly or via the gateway support node GGSN.
  • information of an incoming GSM call has been (by some appropriate way) forwarded to the serving support node, it sends a data packet on the packet radio channel to the mobile station informing of the MT call on GSM channels.
  • the MS is aware of the incoming MT call and may start to monitor GSM paging channels. This may be unconditional, or the mobile station of the user may be given the opportunity to choose if the MT call is received or not.
  • the MS may stay in the GPRS state, for example, if it has an ongoing active data transfer stage that
  • the support node SGSN should also be aware of it so that it can interrupt transmission via the GPRS channels.
  • the serving support node SGSN automatically interrupts the transmission of information on the GPRS channel after having sent the notification of the incoming call according to the invention.
  • the serving SGSN continues its transmission and interrupts the trans ⁇ mission only after having found out that the MS does not respond.
  • the MS when transiting temporarily from the GPRS state, signals via the GPRS channel to the serving support node SGSN that data packets may not be transmitted to it as it is busy elsewhere.
  • the serving SGSN (or some other unit in the GPRS network) may buffer or discard the data received in the meanwhile. In the last mentioned case the data will not be lost altogether as the upper level of end to end connection protocols attend to retransmitting the data packets if the MS does not acknowledge them.
  • the HLR After having sent a notification via the GPRS network, the HLR sends a normal inquiry response to the MSC containing the roaming number of the mobile sta ⁇ tion.

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

Abstract

Une interface radio est obtenue dans un système de radiocommunications par paquets (SGSN, GGSN, 10) au moyen d'un réseau de communications mobiles numérique (BTS, BSC, MSC, HLR). Un équipement terminal bimodal (MS) est capable de fonctionner à la fois dans un état mobile et dans un état de radiocommunications par paquets mais il contrôle différents canaux de commande dans ces états. Il existe des informations dans la base de données de l'abonné (HLR) du réseau de communications mobiles indiquant que la station mobile (MS) n'est pas disponible lorsqu'elle se trouve dans l'état de radiocommunications par paquets. Ceci permet le renvoi automatique d'appels et des messages appropriés relatifs aux appels de raccordement mobiles. Il peut également exister des informations dans la base de données de l'abonné (HLR) indiquant que la station mobile se trouve dans l'état de radiocommunications par paquets. Dans ce cas, la base de données de l'abonné (HLR) du réseau de communications mobiles peut envoyer un avis à la station mobile (MS) par l'intermédiaire du réseau de radiocommunications par paquets (SGSN, GGS, 10) indiquant que la station mobile doit passer à l'état mobile afin de recevoir un appel entrant.
PCT/FI1997/000020 1996-01-16 1997-01-15 Systeme de communications mobiles numerique et procedes de traitement d'un appel de raccordement WO1997026764A1 (fr)

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Application Number Priority Date Filing Date Title
AU14459/97A AU1445997A (en) 1996-01-16 1997-01-15 Digital mobile communication system and methods for processing a terminating call

Applications Claiming Priority (2)

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FI960211A FI102234B (fi) 1996-01-16 1996-01-16 Digitaalinen matkaviestinjärjestelmä ja menetelmiä päättyvän puhelun k äsittelemiseksi
FI960211 1996-01-16

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WO1999017579A2 (fr) * 1997-09-30 1999-04-08 Nokia Networks Oy Radiorecherche d'un abonne mobile visant a etablir une connexion commutee par paquets
WO1999030525A1 (fr) * 1997-12-11 1999-06-17 Ericsson Inc. Systeme, procede et appareil de traitement de messages de notification haute puissance
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FI960211A0 (fi) 1996-01-16
FI102234B (fi) 1998-10-30

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