WO2011069560A1 - Notification d'appel en absence à un abonné itinérant - Google Patents

Notification d'appel en absence à un abonné itinérant Download PDF

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Publication number
WO2011069560A1
WO2011069560A1 PCT/EP2009/066989 EP2009066989W WO2011069560A1 WO 2011069560 A1 WO2011069560 A1 WO 2011069560A1 EP 2009066989 W EP2009066989 W EP 2009066989W WO 2011069560 A1 WO2011069560 A1 WO 2011069560A1
Authority
WO
WIPO (PCT)
Prior art keywords
call
network
message
called terminal
terminal
Prior art date
Application number
PCT/EP2009/066989
Other languages
English (en)
Inventor
Wim Wouterse
Original Assignee
Telefonaktiebolaget L M Ericsson (Publ)
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 L M Ericsson (Publ) filed Critical Telefonaktiebolaget L M Ericsson (Publ)
Priority to JP2012542371A priority Critical patent/JP5671552B2/ja
Priority to PCT/EP2009/066989 priority patent/WO2011069560A1/fr
Priority to EP09802128.0A priority patent/EP2510711B1/fr
Priority to US13/514,733 priority patent/US9344866B2/en
Publication of WO2011069560A1 publication Critical patent/WO2011069560A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support

Definitions

  • This invention relates to a mobile telecommunications network, and in particular to a method for notifying a roaming subscriber of a missed call.
  • Voicemail systems are widely used in telecommunications systems, such as cellular communication systems.
  • a calling subscriber the A-party
  • the B-party the B-party
  • the call is forwarded to the voicemail system of the relevant communications network.
  • Many voicemail systems used by mobile network operators will then send a Short Message System (SMS) to the B-party, informing the subscriber about the missed call, and thus allowing him to place a return call.
  • SMS Short Message System
  • Mobile networks typically have a limited geographical extent, and therefore, in order to allow maximum accessibility, mobile network operators typically have roaming agreements with other mobile network operators, whose networks cover other geographical areas. This allows a call to be placed to a called subscriber, even when he is outside the geographical coverage area of his home network.
  • the process of forwarding the call to the voicemail system in the user's home network may be somewhat expensive.
  • the present invention therefore seeks to provide a system that allows a roaming subscriber to be notified of a missed call, while mitigating at least some of the disadvantages of the systems described above.
  • a method of handling calls in a mobile communication network comprising: in a first node of a home network, receiving a request message, requesting call set-up to a called terminal; and sending a message to a second node of the home network to obtain an address of a mobile switching centre where the called terminal is located.
  • the first node On receiving a reply from the second node, the first node initiates a missed call notification service if it is determined that the called terminal is in a visited network.
  • the first node then initiates a call set-up to the called terminal; and, if it is notified that the call has been released, with no call forwarding having taken place, it notifies the missed call notification service that the call has been released.
  • the missed call notification service causes a message to be sent to the called terminal, notifying it of the missed call.
  • the step of determining that the called terminal is in a visited network can be accomplished by determining if a Mobile Station Roaming Number contains a code, such as a country code or an operator code, that does not belong to the home network.
  • the step of causing a message to be sent to the called terminal may comprise sending a request to a Short Message Service Centre, causing a Short Message Service message to be sent to the called terminal.
  • a method including steps of the method according to the first aspect, performed in the first node, and a Mobile Switching Centre configured to perform the method.
  • a method of handling calls in a service control node of a mobile communication network comprising receiving a command to initiate a missed call notification service from a mobile switching centre if it is determined that a called terminal is in a visited network. On subsequently receiving a notification that the call has been released, with no call forwarding having taken place a message is caused to be sent to the called terminal, notifying it of the missed call.
  • the step of causing a message to be sent to the called terminal may comprise sending a request to a Short Message Service Centre, causing a Short Message Service message to be sent to the called terminal.
  • a Service Control Point configured to perform the method.
  • a method whereby, during a location update, when a first terminal is found to be in a visited network, and when a call forwarding number is found not to be equal to a
  • subscriber data including said call forwarding number is copied to a Visitor Location Register of the visited network.
  • the subscriber data excluding the call forwarding number is copied to a Visitor Location Register of the visited network.
  • the predetermined number may be a voicemail system number.
  • a Home Location Register for a mobile communication network, configured to perform the method.
  • Figure 1 shows a telecommunication network in accordance with an aspect of the present invention.
  • Figure 2 is a flow chart, illustrating a process performed in a Home Location Register of the network shown in Figure 1 , in accordance with an aspect of the present invention.
  • Figure 3 illustrates a message flow in the network of Figure 1 , in accordance with another aspect of the present invention.
  • Figure 4 is a flow chart, illustrating a process performed in a Gateway Mobile Switching Centre of the network shown in Figure 1 , in accordance with another aspect of the present invention.
  • Figure 5 is a flow chart, illustrating a process performed in a Service Control Point of the network shown in Figure 1 , in accordance with another aspect of the present invention.
  • Figure 1 shows a part of a cellular telecommunication network 10, which at this level of generality is essentially conventional, and will therefore be described only in so far as is necessary for an understanding of the present invention.
  • the network 10 includes a Gateway Mobile Switching Centre (GMSC) 12 having a processor 12a for controlling its operation and interface circuitry for interfacing as required with other network nodes.
  • the GMSC 12 is connected to the radio access network (not shown) of the cellular network, so that calls are passed therethrough.
  • the GMSC 12 is connected to a Service Control Point (SCP) 14 in the Intelligent Network architecture, that is able to take part in various additional functions of the network, for example as described in more detail below.
  • SCP 14 has a processor 14a for controlling its operation, and appropriate interface circuitry 14b, and is connected in turn to a Short Message Service Centre (SMS-C) 16, which is able to handle Short Message Service (SMS) messages between subscribers.
  • SMS-C Short Message Service Centre
  • HLR Home Location Register
  • VMSC Visited Mobile Switching services Centre
  • interface circuitry 18c for connecting to other network nodes.
  • a cellular network will typically include many cells, served by respective base stations of the radio access network, and each active user equipment (i.e. each cellular phone or other mobile device) has a connection with one of these base stations.
  • the GMSC 12 receives a call to a called terminal, it can retrieve the necessary information from the HLR 18, allowing the call to be routed through the correct VMSC of the cellular network.
  • a typical cellular network has a limited geographical coverage area, for example one country or a part of a country, and contains multiple GMSCs, such as the GMSC 12, and multiple HLRs, such as the HLR 18.
  • Figure 1 shows a part of the network infrastructure in one other network, used for handling calls with user equipments that have roamed into its coverage area.
  • Figure 1 shows the Visited Mobile Switching Centre (VMSC) and Visitor Location Register (VLR) of that other network.
  • Figure 1 shows the VMSC/VLR as a single block 20, although it will be appreciated that the relevant functionality can be provided in separate equipment if required.
  • Figure 2 is a flow chart, illustrating a procedure performed in a HLR in accordance with an aspect of the invention, either when a mobile terminal is first attaching to the network, or when the mobile terminal is performing a location update procedure.
  • the HLR determines that an attach procedure or a location update procedure is being performed.
  • the HLR identifies the location of the Mobile Switching Centre (MSC) where the mobile terminal is now located, and specifically in step 32 identifies the VLR associated with that MSC.
  • MSC Mobile Switching Centre
  • step 34 it is determined whether the VLR is located in the Home Private Land Mobile Network (HPLMN) of the mobile terminal, or whether the VLR address is an address outside the network of the operator providing the service according to the invention. If it is determined in step 34 that the VLR is in the HPLMN, the process passes to step 36, in which the subscriber data is copied from the HLR to the VLR as is conventional.
  • HPLMN Home Private Land Mobile Network
  • step 34 If it is determined in step 34 that the VLR is not in the HPLMN, that is, the subscriber is roaming, the process passes to step 38.
  • step 38 it is determined whether the subscriber has set up a call forwarding number that is not the voicemail system number. If the subscriber has set up a call forwarding number that is not the voicemail system number, the process passes to step 36 as before, and the subscriber data is copied from the HLR to the VLR as is conventional.
  • step 40 the subscriber data excluding this call forwarding number is copied from the HLR to the VLR.
  • the HLR 18 does not copy the call forwarding number to the VLR if the call forwarding number equals the voicemail system number and if the subscriber is roaming outside his HPLMN.
  • Figure 3 then illustrates the message flow, when attempting to set up a call, in a process in accordance with an aspect of the present invention.
  • the cellular network is a Global System for Mobile communication (GSM) network, or a Universal Mobile Telecommunications System (UMTS) network, or another cellular network using an Intelligent Network (IN) architecture, with the messages between nodes of the network being in accordance with the known system of Customised Applications for Mobile networks using Enhanced Logic (CAMEL).
  • GSM Global System for Mobile communication
  • UMTS Universal Mobile Telecommunications System
  • I Intelligent Network
  • Figure 3 shows the flow of messages between the Service Switching Function (SSF) located in the Gateway Mobile
  • SSF Service Switching Function
  • GMSC Home Location Register
  • HLR Home Location Register
  • MCSRS Missed Call SMS Roaming subscriber Service
  • SCP Service Control Point
  • SMS-C Short Message Service Centre
  • VMSC Visited Mobile Switching Centre
  • VLR Visitor Location Register
  • the procedure for setting up a call from a calling subscriber (the A-party) to a called subscriber (the B-party) starts with an Initial Address Message (IAM) 50, sent to the GMSC 12 from the radio access network.
  • IAM Initial Address Message
  • the GMSC 12 sends a Provide Subscriber Information (PSI) message 52 to the HLR 18.
  • PSI Provide Subscriber Information
  • the HLR 18 having being notified by the other network that the called subscriber is roaming in that other network, sends a Provide Subscriber Information (PSI) message 54 to the VMSC/VLR 20 of the other network to obtain a Mobile Station Roaming Number (MSRN).
  • PSI Provide Subscriber Information
  • the VMSC/VLR 20 of the other network returns a Provide Subscriber Information result (PSI-res) message 56 to the HLR 18, containing the MSRN, which contains the current visitor country code, the visitor national destination code (VNDC), the identification of the current MSC, and the subscriber number.
  • PSI-res Provide Subscriber Information result
  • the HLR 18 returns a further PSI-res message 58 to the GMSC 12.
  • the GMSC 12 When the GMSC 12 receives the returned MSRN, it performs the procedure shown in Figure 4. Specifically, having received the MSRN in step 80, it determines in step 82 whether the MSRN contains a country code and/or operator code that does not belong to its own network operator, indicating that the B-party is roaming. If it is determined in step 82 that the B-party is not roaming, the procedure passes to step 84, in which the call set-up proceeds in a conventional manner. However, if it is determined in step 82 that the B-party is roaming, the procedure passes to step 86, in which the GMSC 12 triggers an Intelligent Networks solution, namely the Missed Call SMS Roaming subscriber service (MCSRS). It is noted that, in this embodiment of the invention, the solution is triggered on the roaming call forwarding leg in the GMSC.
  • MCSRS Missed Call SMS Roaming subscriber service
  • the GMSC 12 triggers the MCSRS by sending an Initial Detection Point (IDP) message 60 to the SCP 14.
  • the SCP 14 responds by sending a message to the GMSC 12 asking it to continue the call set-up, and to report its state in the Basic Call State Model (BCSM), that is, a continue and Request Report BCSM (CUE + RRB) message 62.
  • BCSM Basic Call State Model
  • CUE + RRB Request Report BCSM
  • the MCSRS service monitors the result of the call set-up.
  • the GMSC 12 attempts to set up the call, by sending an Initial
  • IAM Address Message
  • the VMSC will check the VLR to see if the call forwarding numbers are set. Because the call forwarding numbers were not set by the HLR, as described with reference to Figure 2, the VMSC will release the call, by sending a conventional release (REL) message 66 to the GMSC 12, containing a conventional cause value (specifying whether the B-party is Busy, or is Not Reachable, or whether the call was not answered).
  • REL conventional release
  • MCSRS service via a standard Event Report BCSM (ERB) message 68.
  • ERB Event Report BCSM
  • the release is sent to the A-party as the REL message 70, and the call is cleared.
  • FIG. 5 shows the response of the IN Missed Call SMS Roaming subscriber service (MCSRS) deployed on the Service Control Point (SCP) 14 at this point.
  • MCSRS IN Missed Call SMS Roaming subscriber service
  • SCP Service Control Point
  • the MCSRS receives the ERB message 68.
  • the MCSRS sends a Mobile Originating Forward SMS (MOFSMS) message 72 to the Short Message Service Centre (SMS-C) 16, causing the SMS-C to send an SMS 74 to the B-party.
  • MOFSMS Mobile Originating Forward SMS
  • SMS-C Short Message Service Centre
  • the SMS 74 notifies the B-party of the missed call, and in particular contains the A- number in international format, thereby allowing the B-party to place a return call to the A-party if desired.
  • call forwarding is disabled when the B-party is roaming, and as a result the network will release the call if the B-party does not answer.
  • the call release is intercepted, and a missed call SMS is nevertheless sent to the B-party.
  • the B-party is a prepaid subscriber
  • the only change is that, on receiving the IAM 50, the GMSC 12 will first trigger the prepaid service, based on the
  • Terminating IN Category Key (TICK ) or Terminating CAMEL Subscription Information (T-CSI).
  • T-CSI Terminating CAMEL Subscription Information

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

Abstract

Selon l'invention, dans un premier nœud d'un réseau mère, tel qu'un GMSC, lors de la réception d'un message de requête (50) demandant l'établissement d'une communication avec un terminal appelé, un message (52) est envoyé à un second nœud du réseau mère, tel qu'un HLR, afin d'obtenir l'adresse d'un centre de commutation mobile au niveau duquel le terminal appelé est localisé. Lors de la réception d'une réponse (58) du second nœud, le premier nœud déclenche (60) un service de notification d'appel en absence s'il est déterminé que le terminal appelé se trouve dans un réseau visité. Le premier nœud déclenche alors un établissement de communication (64) avec le terminal appelé et, s'il lui est notifié que la communication a été libérée (66), sans qu'un renvoi automatique d'appel ne se soit déroulé, il notifie (68) au service de notification d'appel en absence que la communication a été libérée. Le service de notification d'appel en absence provoque (72) l'envoi d'un message (74) au terminal appelé, lui notifiant l'appel en absence.
PCT/EP2009/066989 2009-12-11 2009-12-11 Notification d'appel en absence à un abonné itinérant WO2011069560A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2012542371A JP5671552B2 (ja) 2009-12-11 2009-12-11 ローミング加入者に対する不在着信通知
PCT/EP2009/066989 WO2011069560A1 (fr) 2009-12-11 2009-12-11 Notification d'appel en absence à un abonné itinérant
EP09802128.0A EP2510711B1 (fr) 2009-12-11 2009-12-11 Notification d'un abonne itinérant d'un appel manque
US13/514,733 US9344866B2 (en) 2009-12-11 2009-12-11 Notifying roaming subscriber of missed call

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2009/066989 WO2011069560A1 (fr) 2009-12-11 2009-12-11 Notification d'appel en absence à un abonné itinérant

Publications (1)

Publication Number Publication Date
WO2011069560A1 true WO2011069560A1 (fr) 2011-06-16

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PCT/EP2009/066989 WO2011069560A1 (fr) 2009-12-11 2009-12-11 Notification d'appel en absence à un abonné itinérant

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US (1) US9344866B2 (fr)
EP (1) EP2510711B1 (fr)
JP (1) JP5671552B2 (fr)
WO (1) WO2011069560A1 (fr)

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US8600364B2 (en) 2011-12-22 2013-12-03 Vonage Network, Llc Systems and methods for terminating telephony communications to mobile telephony devices
US9002336B2 (en) 2011-12-22 2015-04-07 Vonage Network, Llc Systems and methods for terminating telephony communications to mobile telephony devices
US9020478B2 (en) 2011-12-22 2015-04-28 Vonage Network, Llc Systems and methods for terminating telephony communications to mobile telephony devices
US8571060B2 (en) * 2011-12-22 2013-10-29 Vonage Network, Llc Systems and methods for terminating telephony communications to mobile telephony devices
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US8744422B2 (en) 2011-12-22 2014-06-03 Vonage Network, Llc. Systems and methods for terminating telephony communications to mobile telephony devices
US8989721B2 (en) 2011-12-22 2015-03-24 Vonage Network, Llc Systems and methods for terminating telephony communications to mobile telephony devices
US8934882B2 (en) 2011-12-22 2015-01-13 Vonage Network, Llc Systems and methods for terminating telephony communications to mobile telephony devices
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Also Published As

Publication number Publication date
EP2510711B1 (fr) 2018-04-11
US9344866B2 (en) 2016-05-17
JP2013513979A (ja) 2013-04-22
JP5671552B2 (ja) 2015-02-18
EP2510711A1 (fr) 2012-10-17
US20130005308A1 (en) 2013-01-03

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