WO2000078061A1 - Radiomessagerie dans un reseau de telecommunications mobiles - Google Patents

Radiomessagerie dans un reseau de telecommunications mobiles Download PDF

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Publication number
WO2000078061A1
WO2000078061A1 PCT/EP2000/004228 EP0004228W WO0078061A1 WO 2000078061 A1 WO2000078061 A1 WO 2000078061A1 EP 0004228 W EP0004228 W EP 0004228W WO 0078061 A1 WO0078061 A1 WO 0078061A1
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WO
WIPO (PCT)
Prior art keywords
paging
alerts
network
alert
level
Prior art date
Application number
PCT/EP2000/004228
Other languages
English (en)
Inventor
Erkki Aulis Joensuu
Keijo Laiho
Original Assignee
Telefonaktiebolaget Lm 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 Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to JP2001504187A priority Critical patent/JP2003502927A/ja
Priority to AU45647/00A priority patent/AU4564700A/en
Publication of WO2000078061A1 publication Critical patent/WO2000078061A1/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

Definitions

  • the present invention relates to paging in a mobile telecommunications network and more particularly to the paging of a mobile station registered with a mobile telecommunications network.
  • a mobile stations currently registered with a network is notified of an incoming call by a paging message transmitted from a mobile switching centre (MSC) of the network, via a Base Transceiver Station (BTS), on a broadcast paging channel.
  • MSC mobile switching centre
  • BTS Base Transceiver Station
  • a mobile station is similarly notified of incoming text messages (and other network notification messages) by broadcast paging messages.
  • BTSs are responsible for communicating with mobile stations within respective geographical cells within which the BTSs are centred.
  • Sets of adjacent BTSs are grouped into respective Location Areas (LA).
  • LA Location Areas
  • BSC Base Station Controller
  • a Visitor Location Register (VLR) maintains a record of the mobile stations currently registered with the network, as well as the LA in which each registered mobile station is currently located. This information is updated as mobile stations roam between LAs.
  • Each VLR is typically co-located with a MSC of the network.
  • VMSC Visited MSC
  • each LA is allocated a single paging channel on which paging messages may be broadcast to mobile stations within that LA.
  • the capacity of a single paging channel in a PDC network is 15 pages per 0.72 seconds.
  • the capacity offered by a single paging channel may be insufficient. This may result in incoming calls not being connected to mobile stations as well as to delays in the delivery of text and other messages
  • a similar paging channel overload may a ⁇ se following the failure of a VMSC or a component thereof.
  • a failure may result in the loss of information which identifies the LA in which mobile stations currently registered with the network are located. This means that upon recovery of the VMSC, it is necessary to page a mobile station, for which an incoming call or message alert has been received, across the entire network (i.e. in each and every LA). This greatly increases the number of paging messages which must be sent m the period following recovery. Again, such a situation may result in incoming calls not being connected to mobile stations as well as to the failure to deliver incoming messages.
  • LA information may also be lost in the event of a failure of a Home Location Register (HLR) of a PDC network, where the HLR maintains details of the location of subsc ⁇ ber's of that network at the MSC level (as opposed to the LA level). Reset of a failed HLR has a knock-on effect on VMSCs which causes loss of LA information at the VMSCs.
  • HLR Home Location Register
  • a method of handling incoming call and message alerts at a control centre of a mobile telecommunications network during pe ⁇ ods when the paging demand is high the method composing receiving the alerts at the control centre; identifying the priority level of each alert; and causing paging messages corresponding to at least a fraction of the alerts to be broadcast to respective mobile stations registered with the network, wherein paging messages corresponding to those alerts having a high priority level are broadcast ahead of those having a lower priority level.
  • the priority level of an alert may depend upon the service to which the alert relates.
  • alerts may relate to voice or fax telephone calls, data calls, text messages, network notification messages, etc.
  • the priority level of an alert may relate to the time urgency of the service to which an alert relates. This might mean, for example, that alerts relating to telephone calls are allocated the highest priority whilst alerts relating to text messages are allocated the lowest priority.
  • alerts relating to text message deliveries may be rejected whilst alerts relating to incoming telephone calls are processed immediately or are place in a queue for processing if and when capacity becomes available on the paging channel.
  • the paging messages may be broadcast over a radio interface from a point or points which is/are remote from the control centre. It will also be appreciated that the steps of receiving the alerts and identifying the priority level of each alert may be carried out at one node of the telecommunications network, whilst the step of causing paging messages to be broadcast may be carried out at separate network node.
  • priority is allocated on the basis of the identity of the calling and/or called parties to which an incoming alert is associated.
  • subscribers to a mobile telecommunications network may be able to select one of a number of service levels, the subscriber's tariff being linked to the selected service level.
  • incoming alerts associated either as calling party, called party, or a combination of both
  • the control centre may examine one of: the category of the incoming trunk to the centre; the phone number series of the calling subscriber; and a prefix dialled ahead of the called B-number.
  • control centre may examine one of: the phone number (B-number) or IMSI number series of the called party; and a prefix dialled ahead of the called B-number.
  • Identification of the priority level associated with a given calling party or called party may be determined by sending an enquiry from the control point to some other network node, e.g. an HLR or an Intelligent Network Service Control Point, where subscriber priority levels are maintained.
  • some other network node e.g. an HLR or an Intelligent Network Service Control Point, where subscriber priority levels are maintained.
  • the control centre which receives incoming alerts, and causes paging messages to be broadcast may in a PDC or AMPS network be a VMSC.
  • the control centre may be an MSC-VLR or a BSC.
  • the paging priority may be given by or derived from the enhanced Multi-Level Precedence and Pre-emption (eMLPP) service (ETS 300 932).
  • the BSC may indicate the level of paging congestion in the associated Location Area to the MSC-VLR by sending a paging congestion message to the MSC-VLR.
  • the MSC-VLR may filter out low priority alerts, notifying the BSC of only higher priority alerts. In this way, signalling traffic between the MSC-VLR and BSC may be reduced.
  • the MSC-VLR may send a queuing indicator. This indicator notifies the BSC of whether or not the BSC may add the paging request to a queue.
  • the paging priority may depend upon the type of paging which an alert requires. For example, where an alert requires a global page (i.e. a paging over all of the LAs controlled by a control centre), the alert may be given a low priority whilst, where an alert requires a local page (i.e. a paging over a single LA), the alert may be given a high priority.
  • paging control system of a mobile telecommunications network comprising: input means for receiving alerts corresponding to incoming calls and messages; processing means for identifying the priority level of incoming alerts at least during periods when the paging demand is high; and transmission means for causing the transmission of paging messages corresponding to alerts over a paging channel of the telecommunications network, the transmission means being arranged to cause the broadcast of paging messages corresponding to alerts having a high priority ahead of those having a lower priority in the event that the volume of incoming alerts is high.
  • Figure 1 illustrates schematically a telecommunications network of the PDC type
  • Figure 2 is a flow diagram illustrating a method of handling paging messages at a VMSC of the network of Figure 1.
  • FIG. 1 a telecommunications network 1 which makes use of the Japanese PDC digital mobile telephone standard.
  • the network comprises a number of Base Transceiver Stations (BTSs) 2, each of which is arranged to communicate with Mobile Stations (MSs) 3 located within a geographical cell 4 upon which the BTS 2 is centred.
  • BTSs Base Transceiver Stations
  • MSs Mobile Stations
  • a set of adjacent BTSs 2, covering an area 5 referred to as a Location Area (LA) are controlled collectively by a Visited Mobile services Switching Centre (VMSC) 7.
  • the VMSC 7 typically controls many LAs and has the role of routing telephone calls and other user and signalling data within the network 1.
  • the VMSC 7 maintains a record of those MSs which are currently registered with the network 1 as well as the LAs within which the registered stations are located (in GSM networks, this role is performed by a Visitor Location Register (VLR)).
  • VLR Visitor Location Register
  • the mobile network 1 comprises at least one Gateway MSC (GMSC) 8 which provides the interface between the mobile network 1 and foreign networks.
  • GMSC Gateway MSC
  • foreign networks are a PSTN network 9 and a mobile network 10.
  • IAM Initial Address Message
  • ISUP ISDN User Part
  • the broadcast paging message typically includes the International Mobile Subscriber Identity (IMSI) of the called MS 3.
  • IMSI International Mobile Subscriber Identity
  • the MS 3 listens to the broadcast channel for its own IMSI and responds to the paging message by returning an acknowledgement message to the mobile network 1. Resources over the air interface are thereafter reserved, and a B-number answer message is propagated back to the originating foreign network to establish a circuit switched link for carrying the voice data.
  • SMS Short Message Service
  • MC Message Centre
  • IAM Message Centre
  • the VMSC 7 will broadcast a paging message to the destination MS 3.
  • the alert may be sent from the MC to the MSC-VLR using the MAP message "ForwardSM".
  • the volume of incoming alerts may be too high for a single paging channel to handle (either due to sheer demand or possibly following the failure of the VMSC 7 and the loss of location information).
  • the VMSC 7 is aware of the volume of alert traffic (that is incoming IAMs) and in the event of an overload identifies the priority level of each alert. Those alerts which are time- critical are allocated a high priority level while those which are not time-critical are allocated a low priority level. Thus, alerts which correspond to an incoming telephone call for a MS 3 are allocated a high priority whilst those which indicate an incoming text message are allocated a low priority level.
  • the VMSC 7 of the network 1 causes paging messages to be broadcast immediately on the paging channel of the appropriate LA for high priority alerts.
  • alerts corresponding to text messages are converted into paging messages only when spare capacity on the paging channel is available and there are no time-critical related alerts waiting at the VMSC 7.
  • the VMSC 7 may return an error message to the source, e.g. the MC 11. The source may try to initiate the connection at a later time or may even reject the operation.
  • alerts may be given a high or a low priority level or may be given some intermediate priority level. These include fax call and data call alerts, as well as alerts relating to a Message Waiting Indication (MWI).
  • MMI Message Waiting Indication
  • the operator of a network may require subscribers to select one of a number of service levels. For example, subscribers may select a high priority delivery service or a low priority delivery service. In circumstances where paging traffic is high, subscribers selecting the high priority delivery service will have their outgoing calls paged ahead of those subscribers selecting the low priority service . The operator may of course add a cost premium for the high priority delivery service and/or provide a cost reduction to those subscribers selecting the low priority service.
  • the IAM may contain an indication of the selected delivery priority which is detected by the foreign VMSC.
  • the VMSC 7 of the network 1 where a call or text message delivery is initiated may maintain a register of subscribers together with the selected delivery service.
  • the calling subscriber priority may be determined based upon the category of the incoming trunk to the exchange or the phone number of the calling subscriber. The priority may also be identified on the basis of a number prefixed to the called party's number (B- number). The priority for the calling party may also be determined from an incoming signalling message, e.g. an ISUP signalling parameter.
  • the delivery service level may be based upon the identity of the called party.
  • the called party category may be derived from the HLR or an SCP or from the phone or IMSI number series of the called subscriber.
  • the invention may be applied to GSM networks in which an MSC-VLR generates paging requests based upon incoming alerts, and forwards these to a BSC associated with a given Location Area.
  • the MSC-VLR In the absence of any knowledge of the level of paging congestion at the BSC, the MSC-VLR must send all paging requests to the BSC.
  • a new parameter may be added to the BSSAP which handles this traffic. This parameter indicates the congestion level at the BSC, and more particularly notifies the MSC-VLR when the paging channel of the BSC is congested.
  • the MSC- VLR thereafter filters out those alerts which have a low priority, and notifies the BSC of only those paging requests co ⁇ esponding to alerts having a high priority.
  • an additional parameter referred to here as a 'queuing indicator' may accompany a paging request sent from a MSC-VLR to a BSC.
  • This indicator indicates to the BSC whether or not the paging request may be placed in a paging queue at the BSC, awaiting broadcast on the paging channel. If the paging channel is congested when a new paging request is received at the BSC, the accompanying queuing indicator is examined to determine whether or not the paging request can be added to the queue. If so, then the request is queued. If the request cannot be queued, then the BSC analyses the priority level accompanying the request.
  • the BSC may reject a low priority request at or near the front of the paging queue, and replace it with the new request. If the priority of the newly received request is low, then it may be rejected without adding it to the queue.
  • These queuing indicators may be an addition to the use of a paging channel congestion parameter as described in the preceding paragraph.
  • the invention may be applied to a GSM network.
  • the priority of an alert may be determined at the MSC-VLR level, or at the SCP level.
  • a paging message, together with the priority of the message, is then sent to the appropriate BSC.
  • the BSC is aware of the available paging capacity and is thus able to determine if the paging message should be broadcast.
  • the invention may be usefully employed in packet switched networks such as GPRS and the proposed UMTS.
  • the invention is also not limited to the protocols mentioned above for carrying alerts to the VMSC/MSC-VLR.
  • TCP/IP may be used to carry alerts.

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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

Cette invention concerne un procédé de traitement d'appels et d'avis de messages entrants dans un centre de commande d'un réseau de télécommunications mobiles (1) pendant les périodes à fort niveau d'avis de message. Ce procédé consiste à recevoir les avis de message au centre de commande (7), à identifier le niveau de priorité de chacun d'eux et à diffuser des radionmessages correspondant à une partie au moins des avis vers les postes mobiles (3) d'abonnés du réseau (1). Les radiomessages correspondant aux avis assortis d'un niveau de priorité élevé sont diffusés avant les avis de moindre priorité.
PCT/EP2000/004228 1999-06-12 2000-05-09 Radiomessagerie dans un reseau de telecommunications mobiles WO2000078061A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2001504187A JP2003502927A (ja) 1999-06-12 2000-05-09 移動電気通信網における呼び出し
AU45647/00A AU4564700A (en) 1999-06-12 2000-05-09 Paging in a mobile telecommunications network

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9913614A GB2350918B (en) 1999-06-12 1999-06-12 Paging in a mobile telecommunications network
GB9913614.5 1999-06-12

Publications (1)

Publication Number Publication Date
WO2000078061A1 true WO2000078061A1 (fr) 2000-12-21

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Application Number Title Priority Date Filing Date
PCT/EP2000/004228 WO2000078061A1 (fr) 1999-06-12 2000-05-09 Radiomessagerie dans un reseau de telecommunications mobiles

Country Status (5)

Country Link
JP (1) JP2003502927A (fr)
CN (1) CN1139269C (fr)
AU (1) AU4564700A (fr)
GB (1) GB2350918B (fr)
WO (1) WO2000078061A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001089256A1 (fr) * 2000-05-17 2001-11-22 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif et procede permettant de gerer automatiquement le acheminement de demandes de pages basse priorite
EP1549095A1 (fr) * 2003-12-22 2005-06-29 Telefonaktiebolaget LM Ericsson (publ) Procédé et système de télécommunication pour commander les radiomessageries dans un réseau de communication cellulaire
CN1293722C (zh) * 2001-10-29 2007-01-03 诺基亚公司 向用户终端提供多播和/或广播业务的方法
US7480510B1 (en) 2005-10-24 2009-01-20 Sprint Spectrum L.P. Method and apparatus for preventing paging channel overload
US10506465B2 (en) 2010-05-03 2019-12-10 Alcatel Lucent Overload control in a packet mobile communication system

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EP1646257A4 (fr) * 2003-07-10 2009-12-23 Mitsubishi Electric Corp Procede de commande de messagerie, dispositif de commande de messagerie et reseau d'acces sans fil
JP2006165929A (ja) * 2004-12-07 2006-06-22 Nec Corp 移動体通信システムおよびそのページング方法
US20070191031A1 (en) * 2006-02-13 2007-08-16 Shantidev Mohanty Protocols for communication between paging controllers and paging agents during idle mode paging operations in a wireless network
JP6336747B2 (ja) * 2013-12-11 2018-06-06 株式会社Ｎｔｔドコモ 基地局装置、及びページング送信制御方法
CN105357756B (zh) * 2015-10-13 2019-05-14 中国联合网络通信集团有限公司 一种寻呼的方法及通信网络系统
KR102371203B1 (ko) * 2015-10-30 2022-03-07 삼성전자 주식회사 이동 통신 시스템에서 페이징 메시지를 송수신하는 방법 및 장치

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US5533094A (en) * 1992-05-12 1996-07-02 Telefonaktiebolaget L M Ericsson, A Corp. Of Sweden Allocation of paging capacity in cellular applications by storing a set of page request group designations, paging extents and paging priority parameters
WO1997016931A1 (fr) * 1995-11-01 1997-05-09 Motorola Inc. Procede et appareil d'attribution d'un canal de transmission dans un systeme de telecommunication
WO1999007176A1 (fr) * 1997-07-30 1999-02-11 Bellsouth Intellectual Property Corporation Systeme et procede permettant d'assurer la prestation de services de donnees au moyen de ressources cellulaires inactives
WO1999020073A1 (fr) * 1997-10-09 1999-04-22 Ericsson Inc. Priorite dependant de la charge pour abonne mobile

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JP3131446B2 (ja) * 1992-02-27 2001-01-31 テレフオンアクチーボラゲツト エル エム エリクソン 移動無線電話システムの呼出し優先順位
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FI98598C (fi) * 1994-06-28 1997-07-10 Nokia Telecommunications Oy Matkaviestinjärjestelmä ja menetelmä tilaajakutsujen ohjaamiseksi matkaviestinjärjestelmässä
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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5533094A (en) * 1992-05-12 1996-07-02 Telefonaktiebolaget L M Ericsson, A Corp. Of Sweden Allocation of paging capacity in cellular applications by storing a set of page request group designations, paging extents and paging priority parameters
WO1997016931A1 (fr) * 1995-11-01 1997-05-09 Motorola Inc. Procede et appareil d'attribution d'un canal de transmission dans un systeme de telecommunication
WO1999007176A1 (fr) * 1997-07-30 1999-02-11 Bellsouth Intellectual Property Corporation Systeme et procede permettant d'assurer la prestation de services de donnees au moyen de ressources cellulaires inactives
WO1999020073A1 (fr) * 1997-10-09 1999-04-22 Ericsson Inc. Priorite dependant de la charge pour abonne mobile

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001089256A1 (fr) * 2000-05-17 2001-11-22 Telefonaktiebolaget Lm Ericsson (Publ) Dispositif et procede permettant de gerer automatiquement le acheminement de demandes de pages basse priorite
US6731944B1 (en) 2000-05-17 2004-05-04 Telefonaktiebolaget Lm Ericsson Apparatus and method for automatically controlling the forwarding of low priority page requests
CN1293722C (zh) * 2001-10-29 2007-01-03 诺基亚公司 向用户终端提供多播和/或广播业务的方法
EP1549095A1 (fr) * 2003-12-22 2005-06-29 Telefonaktiebolaget LM Ericsson (publ) Procédé et système de télécommunication pour commander les radiomessageries dans un réseau de communication cellulaire
WO2005062649A1 (fr) * 2003-12-22 2005-07-07 Telefonaktiebolaget Lm Ericsson (Publ) Procede et systeme de telecommunications pour commander le flux de radiomessagerie dans un reseau de communications cellulaires
US8301175B2 (en) 2003-12-22 2012-10-30 Telefonaktiebolaget L M Ericsson (Publ) Method and telecommunications system for controlling paging flow in a network for cellular communications
US8594710B2 (en) 2003-12-22 2013-11-26 Telefonaktiebolaget Lm Ericsson (Publ) Method and telecommunications system for controlling paging flow in a network for cellular communications
US7480510B1 (en) 2005-10-24 2009-01-20 Sprint Spectrum L.P. Method and apparatus for preventing paging channel overload
US10506465B2 (en) 2010-05-03 2019-12-10 Alcatel Lucent Overload control in a packet mobile communication system

Also Published As

Publication number Publication date
CN1355999A (zh) 2002-06-26
CN1139269C (zh) 2004-02-18
GB9913614D0 (en) 1999-08-11
GB2350918B (en) 2003-10-29
GB2350918A (en) 2000-12-13
JP2003502927A (ja) 2003-01-21
AU4564700A (en) 2001-01-02

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