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WO2000072619A1 - Procede de gestion de localisation de terminal mobile dans un reseau radiotelephonique mobile cellulaire, reseau radiotelephonique mobile cellulaire et terminal mobile - Google Patents

Procede de gestion de localisation de terminal mobile dans un reseau radiotelephonique mobile cellulaire, reseau radiotelephonique mobile cellulaire et terminal mobile Download PDF

Info

Publication number
WO2000072619A1
WO2000072619A1 PCT/DE2000/001606 DE0001606W WO0072619A1 WO 2000072619 A1 WO2000072619 A1 WO 2000072619A1 DE 0001606 W DE0001606 W DE 0001606W WO 0072619 A1 WO0072619 A1 WO 0072619A1
Authority
WO
WIPO (PCT)
Prior art keywords
location
mobile terminal
mobile
radio network
cellular
Prior art date
Application number
PCT/DE2000/001606
Other languages
German (de)
English (en)
Inventor
Jens Biesterfeld
Klaus Jobmann
Original Assignee
Universität Hannover
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 Universität Hannover filed Critical Universität Hannover
Publication of WO2000072619A1 publication Critical patent/WO2000072619A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
    • 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
    • H04W68/04—User notification, e.g. alerting and paging, for incoming communication, change of service or the like multi-step notification using statistical or historical mobility data
    • 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

Definitions

  • the invention relates to a method for managing the location of a mobile terminal in a cellular mobile radio network according to the preamble of claim 1, a cellular mobile radio network according to the preamble of claim 7 and a mobile terminal according to the preamble of claim 11.
  • static subscriber data and current stay data are stored in a database or several databases by means of a location management device.
  • the data of the mobile device required to find a subscriber is queried by a database query. If the current location area changes, when a predetermined limit between two location areas is exceeded, the new location area is determined by the mobile terminal and passed on to the location management facility of the mobile radio network, which then updates the database.
  • the number of subscribers will increase in future mobile radio networks, which will be offset by a reduction in the size of the radio cells due to the limited capacity of the air interface between the mobile terminals and the radio stations. By increasing the subscriber density in connection with small cells, however, the signaling volume for the location management of the subscribers would increase disproportionately.
  • the invention has for its object to improve a method for location management of a mobile terminal in a cellular mobile radio network according to the preamble of claim 1 in such a way that the signaling volume is reduced and at the same time a current database for the location is ensured in the database responsible for this.
  • This object is achieved in a method according to the preamble of claim 1 by the features specified in the characterizing part.
  • the determination of the location area of a mobile terminal is determined by an estimation method based on a stored movement pattern. Signaling when the location is changed can then be dispensed with if the actual location is included in the forecast. As a result, a large proportion of the signaling volume can already be saved for the total number of registered terminals.
  • correction information is transmitted in the event of deviations of the actual location from the estimated location so that the estimated location corresponds to the current location again. In order to be able to transmit this correction information in a targeted manner, it is necessary to determine the deviation of the actual location from the estimated one.
  • the inventive idea for solving this problem consists in making the same estimate in the forecast of the location area as the facility for location management of the mobile radio network also makes in parallel in the mobile terminal in question.
  • the mobile terminal can then compare its own location with the forecast and only then initiates the transmission corrective information if there is a deviation from the estimated location area.
  • the solution according to the invention does not lead to a reduction in the signaling volume for each individual subscriber in the same way, since it depends on the individual user behavior how large the deviations of the mobility from the stored movement pattern are, but overall the signaling volume is reduced across all subscribers, with at none of the participants experience inappropriately long search times in the event of incoming calls.
  • the correction information can include the actual location. This ensures in any case that an incoming call can be directed to the mobile device. If the actual location area falls into an additionally stored movement pattern, the estimation process can then be continued with this movement pattern in the further forecast.
  • the correction information can also include an updated movement pattern.
  • this can serve to update the movement patterns for the estimation, on the other hand, it can also refine the prognosis of the current determination of the residence and thus reduce the number of other necessary correction information.
  • the movement pattern can include time, state or speed dependent location information or a sub-combination of these. When evaluating all of this information, the prediction accuracy is significantly increased and the number of necessary correction information is thereby reduced.
  • the passive determination of the location area of the mobile terminal can be carried out by evaluating field strengths and / or phase positions of the transmissions of the receivable head-end station and their identifiers.
  • a further improvement can consist in the passive determination of the location area of the mobile terminal by a position determination system, such as the GPS system, which is independent of the mobile radio network.
  • the invention further relates to a cellular mobile radio network according to the preamble of claim 7.
  • a cellular mobile radio network according to the preamble of claim 7.
  • it is based on the object of improving a cellular mobile radio network in such a way that the signaling volume is reduced and at the same time an up-to-date database for the location area is ensured in the database responsible for this.
  • This object is achieved in a cellular mobile radio network according to the preamble of claim 7 by the features specified in the characterizing part of this claim. Further developments and advantageous refinements result from claims 8 to 10.
  • the explanations for claims 1 to 4 apply to the mode of operation and advantages of the features contained in these claims.
  • the invention relates to a mobile terminal according to the preamble of claim 11.
  • it is based on the task of improving a mobile terminal in such a way that the signaling volume is reduced and at the same time an up-to-date database for the area m of the database responsible for it is ensured becomes.
  • the drawing shows: 1 is a schematic representation of part of a cellular mobile radio network with location and search areas,
  • FIG. 2 shows a schematic representation of devices of a cellular mobile radio network with a sketch of the route search
  • FIG. 3 shows a schematic representation of devices of a cellular mobile radio network with a sketch of the signaling when the stay area is updated
  • FIG. 4 shows a schematic representation of devices of a cellular mobile radio network with a sketch of the signaling when a connection request is sent
  • FIG. 6 shows a schematic representation of devices of a cellular mobile radio network modified with respect to FIG. 2 with a sketch of the location determination according to the invention
  • FIG. 7 shows a schematic representation of a part of a cellular mobile radio network with search areas according to the invention, modified in comparison with FIG. 1.
  • a mobile switching center is connected to several radio stations (base transceiver station) BTS via radio station controls (base station controller) BSC.
  • the BTS are assigned to the respective cells.
  • a plurality of cells are used to determine areas within which the subscriber is searched, namely search areas (paging areas) PA and also to determine location areas (LA) on the other hand, if the limit is exceeded, the terminal sends a message to the user about the update of the location area Network sends.
  • the volume of the signaling messages can be controlled within limits by the choice of the size of the search areas and location areas in connection with the number of associated cells and can thus be adapted by the network operator.
  • FIG. 2 shows a schematic representation of devices of a cellular mobile radio network with a sketch of the route before using the example of an incoming connection request from a landline.
  • the route search is divided into two sections. In the first section the selected subscriber number is used for routing and in the second section a temporary number that depends on the current location.
  • the following actions are carried out in detail, which are illustrated in FIG. 2. 1.
  • a connection establishment request is directed to a switching center within the fixed network which aims to establish a connection to a mobile terminal (mobile station) MS. This connection request is forwarded to a mobile switching center (gateway mobile switching station) GMSC. 2.
  • the mobile switching center initiates the mobile switching center to request a location by calling the subscriber's internationally unique number (Mobile Subscriber ISDN Number) MSISDN at a home database in the GSM network (Home Location Register) HLR.
  • the home database there is a reference to the responsible visitor database in the GSM network (Visitor Location Register) VLR, which is called 3. via the internationally unique subscriber address (International Mobile Subscriber Identity) IMSI.
  • the visitor database in whose administrative area the participant is currently responsible is responsible.
  • a temporary station number (Mobile Station Roaming Number) MSR is generated in the visitor database, which is 4. returned to the home database and 5. to the mobile switching center of the caller. With the help of this telephone number, the user connection is now switched to the destination switching center via static traffic routing tables as in the fixed network.
  • the destination exchange requests 7. the visitor assigned to it
  • the database now 8. Generates a search message.
  • the temporary internal network address TMSI Temporary Mobile Subscriber Identity
  • TMSI Temporary Mobile Subscriber Identity
  • the subscriber then has the opportunity to report to the mobile switching center. If the subscriber answers within a certain time, 11. the user connection is switched through, otherwise the connection setup is interrupted.
  • GSM number MSISDN which the calling subscriber must know.
  • MSISDN is used as the directory number in the HLR.
  • the subscriber is addressed within the network via the IM-SI, which is clearly assigned to the actual call number MSISDN in the HLR.
  • TMSI is assigned to the air interface to protect the identity of the participant. This is changed each time the lounge area changes.
  • the GMSC gets the route search information from the HLR to the location of the selected participant. It has a database and software that enables it to select the responsible HLR.
  • the MSRN is a number that is used to establish a connection from the GMSC to the subscriber. visited MSC. This is temporarily assigned to a participant from a pool of numbers.
  • IMSI Attach marks the participant in the VLR as an active message.
  • IMSI Attach Request optional; in the broadcast the mobile station reports in an LA, in which the MS is already registered, e.g. B. after a brief switch-off of the MS
  • IMSI Detach Indication message optional; in the broadcast, the mobile station sends SIM card before switching off or before removing the subscriber identification unit (Subscriber Identity Module), avoiding unnecessary paging c) Location cancellation from HLR to VLR for the purpose of changing the VLR after an LU d) Deregistration, which is currently not used
  • the terminal sends a message to update the location (location update).
  • the mobile switching center then transfers the updated location area LA to the visitor database, which then transmits an entry about the updated location LOC to the home database.
  • the sequence of the signaling connection for paging is shown in FIG. 4.
  • the visitor database sends a signaling protocol (Base Station Subsystem Management Part (BSSMAP)) to all radio station controls BSCs with the IMSI or TMSI and the cell list via the responsible mobile switching center.
  • BSSMAP Base Station Subsystem Management Part
  • the radio station controls then send radio station-specific control calls (radio subsystem management) RSM paging "to the radio stations BTS.
  • RSM radio subsystem management
  • the radio stations BTS send calls to the mobile terminal PAGING REQUEST on the specified radio channel for paging channel (PCH).
  • PCH paging channel
  • Fig. 5 shows a flow diagram of the steps which are carried out in the location management according to the invention.
  • a static procedure with fixed, network-wide specifications is used for residence management Location and search areas used as it is currently used in the GSM network.
  • a terminal sends a location update message if it exceeds a radio cell boundary, which at the same time represents the boundary of a location area.
  • the training phase begins.
  • the estimation method used is trained with the recorded movement data so that a prediction can be made.
  • the amount of data required and their accuracy depend on the forecasting method used.
  • the training phase takes up a very short amount of time compared to the observation phase.
  • the prediction phase follows the training phase.
  • the estimation method used is used to obtain estimates for the current location of the subscriber.
  • the location is only calculated in the network in the event of an incoming call.
  • the location is calculated in the idle state each time the radio cell is changed. If the current location is not included in the result of the prediction, the terminal sends a location update message to the network. In the case of call operation, it is not necessary to update the location because the subscriber communicates with the network via the radio link and the whereabouts are known.
  • the location management method of the observation phase is used and a post-training phase may begin.
  • a post-training phase becomes necessary if the participant has changed his movement habits in the long term.
  • FIG. 6 shows a schematic illustration of devices of a cellular mobile radio network modified with respect to FIG. 2 with a sketch of the determination of the location according to the invention.
  • the home database does not ask the visitor database in a third step, but rather in a mobility computer which has been trained according to an algorithm on the basis of the movement data observed and is now performing a prediction.
  • the subsequent search for the responsible mobile switching center and the calling of the subscriber can also be carried out with or without the involvement of the visitor database.
  • the response of the subscriber is transmitted either to the home database or to the visitor database, depending on which database has sent the search message in question.
  • the user connection is only established when the subscriber has registered.
  • a computer of the same type as the mobility computer determines the location in each terminal using the same algorithm.
  • the mobility calculator of the network as fixed device is activated only in the event of a connection establishment request, the internal computer of the terminal continuously predicts the location and compares it with the actual location. If there is a deviation, a location update is then transmitted to the mobility computer, similar to the description of FIG. 3.
  • the mobility computer is able to specifically address the responsible mobile switching center with each connection establishment request and to have the subscriber called in the current search area.
  • FIG. 7 shows a schematic representation of a part of a cellular mobile radio network with search areas according to the invention modified in comparison with FIG. 1.
  • the search areas are no longer statically defined, but are recalculated each time a connection is established to the mobile device. Individual cells that are not geographically contiguous can also be notified. In order to limit the signaling volume in the case of different probabilities of the locations, the search areas can sequentially descend from the largest to the smallest probability selected and the participant called there.
  • FIG. 7 shows here how the search areas comprising individual cells are called out in succession in the first, second and third attempts. A notification is of course not required if the participant already reports after the first notification.

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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 gestion de localisation de terminal mobile dans un réseau radiotéléphonique mobile cellulaire au moyen d'un procédé d'estimation. Ce procédé détermine, d'après un algorithme fixé, sur la base d'un motif de déplacement mémorisé du terminal mobile, les emplacements estimés de ce dernier et les gère en vue d'une signalisation ciblée du terminal mobile. Le même procédé d'estimation est mis en oeuvre par une unité fixe du réseau radiotéléphonique mobile et, parallèlement, par une unité du terminal mobile lui-même. Ce dernier détermine de manière passive son emplacement effectif et le compare à l'emplacement estimé, déterminé selon le procédé d'estimation. En cas de divergence entre l'emplacement estimé et l'emplacement effectif, un information de correction est transmise à l'unité fixe du réseau radiotéléphonique mobile.
PCT/DE2000/001606 1999-05-22 2000-05-17 Procede de gestion de localisation de terminal mobile dans un reseau radiotelephonique mobile cellulaire, reseau radiotelephonique mobile cellulaire et terminal mobile WO2000072619A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19923638.0 1999-05-22
DE1999123638 DE19923638C2 (de) 1999-05-22 1999-05-22 Verfahren zur Aufenthaltsortsverwaltung eines mobilen Endgerätes in einem zellularen Mobilfunknetz, zellulares Mobilfunknetz sowie mobiles Endgerät

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WO2000072619A1 true WO2000072619A1 (fr) 2000-11-30

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014090198A1 (fr) 2012-12-14 2014-06-19 Huawei Technologies Co., Ltd. Systèmes et procédés de prévision de mobilité d'équipements d'utilisateur
CN112561759A (zh) * 2020-01-02 2021-03-26 北京融信数联科技有限公司 一种基于移动信令大数据的毕业生去向动态监测方法

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GB2277844A (en) * 1993-05-06 1994-11-09 Spectronics Micro Syst Ltd Vehicle location
DE4316091A1 (de) * 1993-05-13 1994-11-17 Sel Alcatel Ag Verfahren und Systemkomponenten zur Ermittlung des Aufenthaltsortes eines Teilnehmers in einem Kommunikationssystem
WO1996013951A1 (fr) * 1994-10-26 1996-05-09 Telefonaktiebolaget Lm Ericsson Procede et dispositif de detection et de prediction du deplacement de terminaux mobiles
WO1998015149A1 (fr) * 1996-10-03 1998-04-09 Nokia Telecommunications Oy Procede de localisation d'une station mobile
US5875400A (en) * 1995-04-18 1999-02-23 Northern Telecom Limited Cellular mobile communications system

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US6148211A (en) * 1997-09-05 2000-11-14 Motorola, Inc. Method and system for estimating a subscriber's location in a cluttered area

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Publication number Priority date Publication date Assignee Title
GB2277844A (en) * 1993-05-06 1994-11-09 Spectronics Micro Syst Ltd Vehicle location
DE4316091A1 (de) * 1993-05-13 1994-11-17 Sel Alcatel Ag Verfahren und Systemkomponenten zur Ermittlung des Aufenthaltsortes eines Teilnehmers in einem Kommunikationssystem
WO1996013951A1 (fr) * 1994-10-26 1996-05-09 Telefonaktiebolaget Lm Ericsson Procede et dispositif de detection et de prediction du deplacement de terminaux mobiles
US5875400A (en) * 1995-04-18 1999-02-23 Northern Telecom Limited Cellular mobile communications system
WO1998015149A1 (fr) * 1996-10-03 1998-04-09 Nokia Telecommunications Oy Procede de localisation d'une station mobile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014090198A1 (fr) 2012-12-14 2014-06-19 Huawei Technologies Co., Ltd. Systèmes et procédés de prévision de mobilité d'équipements d'utilisateur
EP2932774A4 (fr) * 2012-12-14 2015-11-18 Huawei Tech Co Ltd Systèmes et procédés de prévision de mobilité d'équipements d'utilisateur
US9686769B2 (en) 2012-12-14 2017-06-20 Huawei Technologies Co., Ltd. Systems and methods for user equipment mobility prediction
CN104838708B (zh) * 2012-12-14 2019-02-19 华为技术有限公司 用于用户设备移动性预测的系统和方法
CN112561759A (zh) * 2020-01-02 2021-03-26 北京融信数联科技有限公司 一种基于移动信令大数据的毕业生去向动态监测方法
CN112561759B (zh) * 2020-01-02 2023-08-04 北京融信数联科技有限公司 一种基于移动信令大数据的毕业生去向动态监测方法

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DE19923638A1 (de) 2000-11-30

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