EP1330803B1 - Method for acquiring traffic data in a road network and terminal - Google Patents

Method for acquiring traffic data in a road network and terminal Download PDF

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Publication number
EP1330803B1
EP1330803B1 EP01992987A EP01992987A EP1330803B1 EP 1330803 B1 EP1330803 B1 EP 1330803B1 EP 01992987 A EP01992987 A EP 01992987A EP 01992987 A EP01992987 A EP 01992987A EP 1330803 B1 EP1330803 B1 EP 1330803B1
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EP
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Prior art keywords
terminal device
vehicle
software program
mobile radio
radio network
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EP01992987A
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German (de)
French (fr)
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EP1330803A1 (en
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Michael Alger
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Vodafone Holding GmbH
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Vodafone Holding GmbH
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions

Definitions

  • the invention relates to a method for detecting traffic situation data in a traffic network according to the preamble of patent claim 1. Furthermore, the invention relates to a terminal device for such a method.
  • FCD Floating Car Data
  • the respective vehicle must have a special device device (eg GPS receiver) in addition to the already required terminal for a mobile communication between the vehicle and the traffic situation detection center.
  • a special device device eg GPS receiver
  • a method for detecting traffic data of vehicles which does not require a special device comparable to a GPS receiver. Rather, the vehicle-side equipment expense is limited to the use of a terminal for a mobile network, so a mobile phone that is carried in the vehicle. In addition to its function for mobile communication, this terminal also has a function for obtaining time information and for storing information. Furthermore, in this method at least one central unit in the sense of a data acquisition center is provided, which is assigned to a plurality of terminals, that is to say a plurality of FCD vehicles. During the journey, the terminals determine information that characterize the radio cells of the mobile radio network as well as other radio and transmission technical information of the mobile network.
  • Object of the present invention is to propose a method that manages with a respect to the FCD vehicles used very low equipment complexity and in which the communication effort for data exchange with the traffic situation detection center is low. Furthermore, a terminal device is to be proposed which is suitable for corresponding FCD vehicles.
  • a terminal device has the features of claim 11 and is characterized by the features of claims 12 and 13 in an advantageous manner further ausgestaltbar.
  • the invention provides a method for detecting traffic situation data in a traffic route network, which is covered by a plurality of base stations of a cellular mobile radio network, in particular a GSM or UMTS network, and in which a plurality of vehicles moves, each with a are provided in operation terminal device (terminal) for the mobile network.
  • the terminal usually a mobile phone, so does not have to be used by the user, but only has to be turned on. In this case, operating data incurred in the operation of the terminal in contact with the base stations, for determining the current location of the respective terminal, so ultimately the vehicle used.
  • the terminal device has a digital map of the traffic route network, which is formed from a multiplicity of geographical points or discrete route sections representative of the course of the traffic route network, wherein the points or route sections are each assigned characteristic values of operating parameters of the mobile radio network.
  • this digital map is spanned by coordinates that relate to operating parameters of the individual base stations.
  • the terminal device has a software program that automatically compares each currently available operating parameters with the stored operating parameters of the digital map and from each determined the current spatial position of the terminal and thus the FCO vehicle. The software program of the terminal also determines repeatedly representative of the speed of the vehicle value.
  • SMS message, SMS Short Message Service
  • a message from a FCD vehicle therefore includes information that is representative of the vehicle speed at a location or in a correspondingly adjacent route section as well as location information for unambiguous identification of the location or the route section to which the speed information relates.
  • the received messages are evaluated to determine the traffic situation.
  • the messages that are transmitted to the traffic control center in addition, also provided with a time information, so include a time that correlates with the speed and location information.
  • This time information may conveniently be added by the terminal in the FCD vehicle. However, it could also be added in the sense of an end time when receiving the respective SMS message from the control center.
  • the invention provides that the speed information of the FCD vehicle is approximately determined by the software program on the basis of the distances of the local positions of the FCD vehicle determined at different times.
  • This has the advantage that the location positions are completely self-determined by the terminal, so in FCD vehicle no special facilities such as a GPS receiver must be available. It also need not provide interfaces to a corresponding sensor in the FCD vehicle on the terminal become.
  • the software program has stored driving profiles that are characteristic of certain road types, such as a highway or a country road. In that case, it is possible to ascertain on the basis of a comparison of the actually driven driving profile with the stored driving profiles on which road type the FCD vehicle is currently located. Thus, an additional criterion is given to improve the spatial positioning in their accuracy. In this way, the terminal device is enabled to decide on which road the respective FCD vehicle is currently located, for example, in the case of roads of different types that are relatively close to each other.
  • the software program of the mobile terminal in the FCD vehicle also has predetermined rules which serve to decide on which events or conditions the FCD vehicle has to report to the control center.
  • a rule may be useful in the specification of a minimum speed at which falls below the reporting activity is activated. If, for example, when driving on a motorway at a speed in a typical speed range for the highway suddenly the vehicle speed drops drastically, so that a predetermined threshold is exceeded. this indicates the presence of a traffic jam, such as an accident or excessive traffic. In this case, it is expedient to send out as soon as possible a corresponding message to the traffic data collection center. However, if the FCD vehicle is already stuck in traffic, then another reporting activity is initially of no interest, as no change could be reported. Only when the vehicle starts moving again, there is an interest for the traffic control center to gain knowledge of this.
  • the stored rules can therefore contain corresponding specifications.
  • the operating parameters of the mobile radio network currently present in the terminal device expediently include in particular the identifier of that base station which delivers the currently highest field strength at the location of the terminal device.
  • a criterion for the location determination is thus the identifier of the respective radio cell in which the FCD vehicle resides. But that would generally be too rough a position. Therefore, it is recommended that the operating parameters of the mobile radio network used for location determination also include, for example, field strength information about other base stations receivable by the terminal at the current location.
  • current signal transit times to the different base stations can be used for such an evaluation.
  • it is by no means necessary to separately register the cell change that is to say a transition of the FCD vehicle from one radio cell to an adjacent one, and to record the present time of the transition, as described in US Pat DE 196 38 070 A1 necessary is.
  • FCD function including the required database (digital map, decision rules)
  • a built-in the respective FCD vehicle digital handsfree device is used for the inventive method, which is connected to the terminal in the intended manner.
  • Such a terminal already has a processor for the digital processing of acoustic signals.
  • This processor in conjunction with a corresponding storage volume, can easily be loaded with the required software program including the database. This has the great advantage that on the one hand it is guaranteed from the outset that the hands-free system is carried in a vehicle and not by a pedestrian, so that uninteresting SMS messages can be excluded from pedestrians from the outset.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Traffic Control Systems (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)

Abstract

The invention relates to a method for acquiring data in a road network which is covered by a number of base stations of a GSM or UMTS standard cellular mobile radiotelephony network and in which a number of vehicles move. These vehicles are each provided with an operational mobile terminal for the mobile radiotelephone network. Operating data which are produced when the terminal operates in contact with the base station are used to determine the current whereabouts of the respective terminal. The invention also relates to a terminal for a cellular mobile radiotelephone network, especially a GSM or UMTS standard mobile radiotelephone network, in a vehicle.

Description

Die Erfindung betrifft ein Verfahren zur Erfassung von Verkehrslagedaten in einem Verkehrswegenetz gemäß dem Oberbegriff des Patentanspruchs 1. Ferner betrifft die Erfindung eine Endeinrichtung für ein solches Verfahren.The invention relates to a method for detecting traffic situation data in a traffic network according to the preamble of patent claim 1. Furthermore, the invention relates to a terminal device for such a method.

Zur Erfassung von Verkehrslagedaten werden vielfach stationäre Einrichtungen wie Induktionsschleifen oder Sensoren auf der Basis von Infrarot-, Ultraschall- oder Radarstrahlen benutzt. Es sind aber auch Verfahren bekannt, bei dem die im Straßenverkehr sich bewegenden Fahrzeuge selbst im Sinne beweglicher Sensoren zur Datenermittlung eingesetzt werden. Solche Verfahren werden auch als FCD-Verfahren (Floating Car Data) bezeichnet. Ein solches Verfahren ist beispielsweise aus der WO 99/42971 bekannt. Dabei werden in einem Fahrzeug, das als beweglicher Sensor (FCD-Fahrzeug) eingesetzt wird, Geschwindigkeitswerte ermittelt und mit den zugehörigen Ortspositionsdaten an eine Verkehrslageerfassungszentrale zur weiteren Auswertung übermittelt. Die jeweilige Ortsposition des FCD-Fahrzeugs wird im Regelfall unter Zuhilfenahme von Navigationssatelliten vorgenommen. Hierzu muss das jeweilige Fahrzeug über eine spezielle Geräteeinrichtung (z.B. GPS-Empfänger) zusätzlich zu dem ohnehin erforderlichen Endgerät für eine mobile Kommunikation zwischen dem Fahrzeug und der Verkehrslageerfassungszentrale verfügen. Dies bedingt einen entsprechenden Kostenaufwand für ein solches Spezialgerät, hat aber auf der anderen Seite den Vorteil, dass aus den empfangenen Signalen des Navigationssatellitensystems auch eine genaue Geschwindigkeitsmessung für das Fahrzeug möglich ist.In many cases stationary devices such as induction loops or sensors based on infrared, ultrasound or radar beams are used to detect traffic situation data. However, methods are also known in which the vehicles moving in traffic are themselves used in the sense of movable sensors for data acquisition. Such methods are also referred to as FCD (Floating Car Data) methods. Such a method is for example from the WO 99/42971 known. In this case, in a vehicle which is used as a movable sensor (FCD vehicle), speed values are determined and transmitted together with the associated position data to a traffic situation detection center for further evaluation. The respective location of the FCD vehicle is usually carried out with the aid of navigation satellites. For this purpose, the respective vehicle must have a special device device (eg GPS receiver) in addition to the already required terminal for a mobile communication between the vehicle and the traffic situation detection center. This requires a corresponding cost for such a special device, but on the other hand has the advantage that from the received signals of the navigation satellite system and an accurate speed measurement for the vehicle is possible.

Aus der DE 196 38 070 A1 ist ein Verfahren zur Erfassung von Verkehrsdaten von Fahrzeugen bekannt, bei dem keine mit einem GPS-Empfänger vergleichbare Spezialeinrichtung erforderlich ist. Vielmehr beschränkt sich der fahrzeugseitige gerätetechnische Aufwand auf die Verwendung einer Endeinrichtung für ein Mobilfunknetz, also ein Mobilfunketelefon, das in dem Fahrzeug mitgeführt wird. Diese Endeinrichtung verfügt neben ihrer Funktion zur Mobilkommunikation auch über eine Funktion zur Erlangung von Zeitinformationen und zur Speicherung von Informationen. Ferner ist bei diesem Verfahren mindestens eine Zentraleinheit im Sinne einer Datenerfassungszentrale vorgesehen, der mehrere Endgeräte, also mehrere FCD-Fahrzeuge zugeordnet sind. Während der Fahrt ermitteln die Endgeräte Informationen, die die Funkzellen des Mobilfunkenetzes charakterisieren sowie weitere funk- und übertragungstechnische Informationen des Mobilfunknetzes. Wesentlich dabei ist es, dass während der Fahrt auch den Zellwechsel charakterisierende Informationen zusammen mit Zeitmarken aufgezeichnet werden. Es wird in der Endeinrichtung also festgehalten, zu welchem Zeitpunkt ein Wechsel von einer Funkzelle zur anderen stattgefunden hat. Diese Informationen werden von den einzelnen Endgeräten gesammelt und an eine Zentrale zur weiteren Auswertung übermittelt. Dort erfolgt dann anhand dieser Informationen eine Rekonstruktion des Fahrweges des jeweiligen Fahrzeugs. Schließlich findet eine Auswertung der rekonstruierten Fahrwege im Hinblick auf die Bestimmung von Größen statt, die den Verkehrsfluss auf den Fahrwegen charakterisieren. Gegenüber den FCD-Verfahren, die mit Fahrzeugen arbeiten, welche vergleichsweise sehr genaue Ortspositionsangaben anhand eines GPS-Empfängers bieten, hat dieses bekannte Verfahren den Nachteil, dass die Informationen über den jeweiligen Aufenthaltsort der FCD-Fahrzeuge sehr ungenau sind und auch keine verlässlichen Daten über die gefahrenen Geschwindigkeiten der FCD-Fahrzeuge zur Verfügung stehen. Ferner ist der Kommunikationsaufwand zwischen den FCD-Fahrzeugen und der jeweiligen Zentrale sehr hoch.From the DE 196 38 070 A1 A method for detecting traffic data of vehicles is known which does not require a special device comparable to a GPS receiver. Rather, the vehicle-side equipment expense is limited to the use of a terminal for a mobile network, so a mobile phone that is carried in the vehicle. In addition to its function for mobile communication, this terminal also has a function for obtaining time information and for storing information. Furthermore, in this method at least one central unit in the sense of a data acquisition center is provided, which is assigned to a plurality of terminals, that is to say a plurality of FCD vehicles. During the journey, the terminals determine information that characterize the radio cells of the mobile radio network as well as other radio and transmission technical information of the mobile network. It is essential that during the journey also the cell change characterizing information is recorded together with time stamps. It is thus recorded in the terminal at which time a change from one cell to another has taken place. This information is collected by the individual terminals and transmitted to a control center for further evaluation. There then takes place on the basis of this information, a reconstruction of the route of the respective vehicle. Finally, an evaluation of the reconstructed driveways takes place with respect to the determination of quantities which characterize the traffic flow on the driveways. Compared to the FCD method, which work with vehicles that provide comparatively very accurate spatial position information using a GPS receiver, this known method has the disadvantage that the information about the respective location of the FCD vehicles are very inaccurate and no reliable data on the speeds of the FCD vehicles are available. Furthermore, the communication effort between the FCD vehicles and the respective headquarters is very high.

Ferner sind folgende Dokumente aus dem Stand der Technik für die vorliegende Erfindung relevant: DE-A-19755875 , EP-A-0412286 , WO-A1-96/42179 , DE-A1-3827352 und das Artikel " Positioning GSM Telephones", C. Drane et al., IEEE Communication Magazine, April 1998, Seiten 46-59 .Further, the following prior art documents are relevant to the present invention: DE-A-19755875 . EP-A-0412286 . WO-A1-96 / 42179 . DE-A1-3827352 and the article " Positioning GSM Telephones ", C. Drane et al., IEEE Communication Magazine, April 1998, pages 46-59 ,

Aufgabe der vorliegenden Erfindung ist es, ein Verfahren vorzuschlagen, das mit einem bezüglich der eingesetzten FCD-Fahrzeuge sehr geringen gerätetechnischen Aufwand auskommt und bei dem auch der Kommunikationsaufwand für den Datenaustausch mit der Verkehrslageerfassungszentrale gering ist. Ferner soll eine Endeinrichtung vorgeschlagen werden, die für entsprechende FCD-Fahrzeuge geeignet ist.Object of the present invention is to propose a method that manages with a respect to the FCD vehicles used very low equipment complexity and in which the communication effort for data exchange with the traffic situation detection center is low. Furthermore, a terminal device is to be proposed which is suitable for corresponding FCD vehicles.

Gelöst wird diese Aufgabe bei einem gattungsgemäßen Verfahren durch die im Patentanspruch 1 angebenen Merkmale. Vorteilhafte Weiterbildungen dieses Verfahrens ergeben sich aus den Unteransprüchen 2 bis 10. Eine erfindungsgemäße Endeinrichtung weist die Merkmale des Anspruchs 11 auf und ist durch die Merkmale der Ansprüche 12 und 13 in vorteilhafter Weise weiter ausgestaltbar.This object is achieved in a generic method by the specified in claim 1 features. Advantageous developments of this method will become apparent from the dependent claims 2 to 10. A terminal device according to the invention has the features of claim 11 and is characterized by the features of claims 12 and 13 in an advantageous manner further ausgestaltbar.

Die Erfindung stellt ein Verfahren zur Erfassung von Verkehrslagedaten in einem Verkehrswegenetz zur Verfügung, das von einer Vielzahl von Basisstationen eines zellularen Mobilfunknetzes, insbesondere eines GSM- oder UMTS-Netzes, überdeckt ist und in dem sich eine Vielzahl von Fahrzeugen bewegt, die jeweils mit einer in Betrieb befindlichen Endgeräteeinrichtung (Endeinrichtung) für das Mobilfunknetz versehen sind. Die Endeinrichtung, im Regelfall also ein Mobiltelefon, muss also nicht gerade vom Nutzer benutzt werden, sondern muss lediglich eingeschaltet sein. Dabei werden Betriebsdaten, die beim Betrieb der Endeinrichtung im Kontakt mit den Basisstationen anfallen, zur Bestimmung des aktuellen Aufenthaltsorts der jeweiligen Endeinrichtung, also letztlich auch des Fahrzeugs, genutzt. Im Unterschied zu dem aus der DE 196 38 070 A1 bekannten Verfahren verfügt hierbei die Endeinrichtung über eine digitale Karte des Verkehrswegenetzes, die aus einer Vielzahl von für den Verlauf des Verkehrswegenetzes repräsentativen geographischen Punkten oder diskreten Streckenabschnitten gebildet ist, wobei den Punkten oder Streckenabschnitten jeweils charakteristische Werte von Betriebsparametern des Mobilfunknetzes zugeordnet sind. Insoweit kann man auch sagen, dass diese digitale Karte von Koordinaten aufgespannt wird, die sich auf Betriebsparameter der einzelnen Basisstationen beziehen. Weiterhin ist vorgesehen, dass die Endeinrichtung über ein Softwareprogramm verfügt, das selbsttätig jeweils aktuell vorliegende Betriebsparameter mit den gespeicherten Betriebsparametern der digitalen Karte vergleicht und daraus jeweils die aktuelle Ortsposition der Endeinrichtung und somit des FCO-Fahrzeugs ermittelt. Das Softwareprogramm der Endeinrichtung ermittelt darüber hinaus auch wiederholt einen für die Geschwindigkeit des Fahrzeugs repräsentativen Wert. Dies kann beispielsweise die tatsächliche Geschwindigkeit in einem vorgegebenen Zeitintervall sein oder beispielsweise auch eine mittlere Geschwindigkeit in einem größeren Zeitintervall. Es könnte sich aber z.B. auch um zurückgelegte Entfernungen in einem vorgegebenen Zeitintervall oder um Reisezeiten für das Zurücklegen einer vorgegebene Wegstrecke handeln. Darüber hinaus verfügt das Softwareprogramm über gespeicherte Regeln, die die Endeinrichtung jeweils veranlassen, unter bestimmten vorgegebenen Bedingungen eine Meldung über den Betriebsdatenkanal des Mobilfunknetzes (SMS-Meldung, SMS = Short Message Service) an eine Zentrale zu übermitteln, wobei die Meldung zumindest Orts- und Geschwindigkeitsinformationen des Fahrzeugs enthält. Das bedeutet also, dass das Softwareprogramm im Regelfall nicht fortwährend, sondern in Abhängigkeit vom Eintreten bestimmter Ereignisse seine Meldungen herausschickt. Damit kann die Meldetätigkeit des FCD-Fahrzeugs auf Situationen beschränkt werden, die für die Verkehrslageerfassung von besonderer Bedeutung sind (z.B. zähflüssiger Verkehr, Stau). Hierdurch werden die Kommunikationskosten für das Verfahren wesentlich reduziert. Hierzu trägt auch bei, dass für die Übermittlung der Meldungen an die Verkehrslageerfassungszentrale der kostengünstige Weg über den Betriebsdatenkanal des Mobilfunknetzes gewählt wird. Eine Meldung eines FCD-Fahrzeugs umfasst somit im Regelfall Informationen, die für die Fahrzeuggeschwindigkeit an einem Ort oder in einem entsprechend angegrenzten Streckenabschnitt repräsentativ ist sowie Ortsinformationen zur eindeutigen Kennzeichnung des Orts bzw. des Streckenabschnitts, auf den die Geschwindigkeitsinformation bezogen ist. In der Verkehrslagerfassungszentrale werden die empfangenen Meldungen zur Ermittlung der Verkehrslage ausgewertet.The invention provides a method for detecting traffic situation data in a traffic route network, which is covered by a plurality of base stations of a cellular mobile radio network, in particular a GSM or UMTS network, and in which a plurality of vehicles moves, each with a are provided in operation terminal device (terminal) for the mobile network. The terminal, usually a mobile phone, so does not have to be used by the user, but only has to be turned on. In this case, operating data incurred in the operation of the terminal in contact with the base stations, for determining the current location of the respective terminal, so ultimately the vehicle used. Unlike the one from the DE 196 38 070 A1 In this case, the terminal device has a digital map of the traffic route network, which is formed from a multiplicity of geographical points or discrete route sections representative of the course of the traffic route network, wherein the points or route sections are each assigned characteristic values of operating parameters of the mobile radio network. In that regard, one can also say that this digital map is spanned by coordinates that relate to operating parameters of the individual base stations. It is further provided that the terminal device has a software program that automatically compares each currently available operating parameters with the stored operating parameters of the digital map and from each determined the current spatial position of the terminal and thus the FCO vehicle. The software program of the terminal also determines repeatedly representative of the speed of the vehicle value. This can be, for example, the actual speed in a given time interval or, for example, also an average speed in a larger time interval. However, it could also be, for example, traveled distances in a predetermined time interval or traveling times for covering a given distance. In addition, it has the software program via stored rules that cause the terminal in each case under certain predetermined conditions to transmit a message via the operating data channel of the mobile network (SMS message, SMS = Short Message Service) to a center, the message at least location and speed information of the vehicle contains. This means that the software program usually does not continually send out its messages, depending on the occurrence of certain events. Thus, the reporting activity of the FCD vehicle can be limited to situations that are of particular importance for the traffic situation detection (eg viscous traffic, congestion). As a result, the communication costs for the process are substantially reduced. This also contributes to the fact that for the transmission of the messages to the traffic situation detection center the cost-effective way is selected via the operating data channel of the mobile network. As a rule, a message from a FCD vehicle therefore includes information that is representative of the vehicle speed at a location or in a correspondingly adjacent route section as well as location information for unambiguous identification of the location or the route section to which the speed information relates. In the traffic storage center, the received messages are evaluated to determine the traffic situation.

Vorteilhaft ist es, wenn die Meldungen, die an die Verkehrslagezentrale übermittelt werden, zusätzlich auch mit einer Zeitinformation versehen sind, also auch eine Zeitangabe umfassen, die mit der Geschwindigkeits- und Ortsinformation korreliert. Diese Zeitinformation kann zweckmäßigerweise von der Endeinrichtung im FCD-Fahrzeug hinzugefügt werden. Sie könnte aber auch im Sinne eines Endzeitpunktes beim Empfang der jeweiligen SMS-Meldung von der Zentrale angefügt werden.It is advantageous if the messages that are transmitted to the traffic control center, in addition, also provided with a time information, so include a time that correlates with the speed and location information. This time information may conveniently be added by the terminal in the FCD vehicle. However, it could also be added in the sense of an end time when receiving the respective SMS message from the control center.

In einer bevorzugten Ausführungsform sieht die Erfindung vor, dass die Geschwindigkeitsinformation des FCD-Fahrzeugs näherungsweise von dem Softwareprogramm anhand der Entfernungen der zu verschiedenen Zeitpunkten ermittelten Ortspositionen des FCD-Fahrzeugs bestimmt wird. Dies hat den Vorteil, dass die Ortspositionen völlig autark von der Endeinrichtung ermittelbar sind, also im FCD-Fahrzeug keine Spezialeinrichtungen wie etwa ein GPS-Empfänger zur Verfügung stehen müssen. Es brauchen auch keine Schnittstellen zu einer entsprechenden Sensorik im FCD-Fahrzeug an der Endeinrichtung vorgesehen werden. Selbstverständlich ist es aber auch möglich, die Geschwindigkeitsinformation etwa über eine solche Schnittstelle von einem Geschwindigkeitsmesser des FCD-Fahrzeugs abzugreifen. Dies setzt aber die Installation entsprechender Signalleitungen voraus.In a preferred embodiment, the invention provides that the speed information of the FCD vehicle is approximately determined by the software program on the basis of the distances of the local positions of the FCD vehicle determined at different times. This has the advantage that the location positions are completely self-determined by the terminal, so in FCD vehicle no special facilities such as a GPS receiver must be available. It also need not provide interfaces to a corresponding sensor in the FCD vehicle on the terminal become. Of course, it is also possible to use the speed information about such an interface from a speedometer of the FCD vehicle. However, this requires the installation of appropriate signal lines.

Von besonderem Vorteil ist es, wenn das Softwareprogramm über gespeicherte Fahrprofile verfügt, die für bestimmte Straßentypen wie etwa eine Autobahn oder eine Landstraße charakteristisch sind. Dann kann nämlich anhand eines Vergleichs des tatsächlich gefahrenen Fahrprofils mit den gespeicherten Fahrprofilen festgestellt werden, auf welchem Straßentyp sich das FCD-Fahrzeug gerade befindet. Damit ist ein zusätzliches Kriterium gegeben, um die Ortspositionsbestimmung in ihrer Genauigkeit zu verbessern. Die Endeinrichtung wird auf diese Weise in die Lage versetzt, etwa bei relativ dicht nebeneinander verlaufenden Straßen unterschiedlichen Typs zu entscheiden, auf welcher Straße sich das jeweilige FCD-Fahrzeug gerade befindet.It is particularly advantageous if the software program has stored driving profiles that are characteristic of certain road types, such as a highway or a country road. In that case, it is possible to ascertain on the basis of a comparison of the actually driven driving profile with the stored driving profiles on which road type the FCD vehicle is currently located. Thus, an additional criterion is given to improve the spatial positioning in their accuracy. In this way, the terminal device is enabled to decide on which road the respective FCD vehicle is currently located, for example, in the case of roads of different types that are relatively close to each other.

Wie bereits ausgeführt, verfügt das Softwareprogramm der mobilen Endeinrichtung im FCD-Fahrzeug auch über vorgegebene Regeln, die zur Entscheidung darüber dienen, bei welchen Ereignissen oder Bedingungen vom FCD-Fahrzeug eine Meldung an die Zentrale zu erfolgen hat. Eine solche Regel kann zweckmäßig in der Vorgabe einer Mindestgeschwindigkeit bestehen, bei deren Unterschreiten die Meldetätigkeit aktiviert wird. Wenn also beispielsweise beim Befahren einer Autobahn mit einer Geschwindigkeit in einem für die Autobahn typischen Geschwindigkeitsbereich plötzlich die Fahrzeuggeschwindigkeit drastisch absinkt, so dass ein vorgegebener Schwellenwert unterschritten ist. so deutet dies auf das Vorhandensein eines Staus etwa durch einen Unfall oder durch zu hohes Verkehrsaufkommen hin. In diesem Fall ist es zweckmäßig, möglichst unverzüglich eine entsprechende Meldung an die Verkehrsdatenerfassungszentrale herauszuschicken. Wenn aber das FCD-Fahrzeug bereits im Stau steht, so ist eine weitere Meldetätigkeit zunächst ohne jedes Interesse, da keine Veränderung mitgeteilt werden könnte. Erst wenn sich das Fahrzeug wieder in Bewegung setzt, besteht für die Verkehrslagezentrale ein Interesse, hiervon Kenntnis zu erlangen. Das gespeicherte Regelwerk kann daher entsprechende Vorgaben enthalten.As already stated, the software program of the mobile terminal in the FCD vehicle also has predetermined rules which serve to decide on which events or conditions the FCD vehicle has to report to the control center. Such a rule may be useful in the specification of a minimum speed at which falls below the reporting activity is activated. If, for example, when driving on a motorway at a speed in a typical speed range for the highway suddenly the vehicle speed drops drastically, so that a predetermined threshold is exceeded. this indicates the presence of a traffic jam, such as an accident or excessive traffic. In this case, it is expedient to send out as soon as possible a corresponding message to the traffic data collection center. However, if the FCD vehicle is already stuck in traffic, then another reporting activity is initially of no interest, as no change could be reported. Only when the vehicle starts moving again, there is an interest for the traffic control center to gain knowledge of this. The stored rules can therefore contain corresponding specifications.

Zweckmäßigerweise umfassen die in der Endeinrichtung aktuell vorliegenden Betriebsparameter des Mobilfunknetzes insbesondere die Kennung derjenigen Basisstation, welche die aktuell höchste Feldstärke am Ort der Endeinrichtung liefert. Ein Kriterium für die Ortsbestimmung ist somit die Kennung der jeweiligen Funkzelle, in der sich das FCD-Fahrzeug aufhält. Das wäre aber im Allgemeinen eine zu grobe Ortsbestimmung. Daher empfiehlt es sich, dass die zur Ortsbestimmung herangezogenen Betriebsparameter des Mobilfunknetzes auch beispielsweise Feldstärkeinformationen über andere von der Endeinrichtung empfangbare Basisstationen am aktuellen Aufenthaltsort umfassen. Selbstverständlich können auch aktuelle Signallaufzeiten zu den unterschiedlichen Basisstationen für eine solche Auswertung herangezogen werden. Es ist aber keinesfalls erforderlich, den Zellwechsel, also einen Übergang des FCD-Fahrzeugs von einer Funkzelle in eine benachbarte gesondert zu registrieren und den dabei vorliegenden Zeitpunkt des Übertritts festzuhalten, wie dies gemäß DE 196 38 070 A1 notwendig ist.The operating parameters of the mobile radio network currently present in the terminal device expediently include in particular the identifier of that base station which delivers the currently highest field strength at the location of the terminal device. A criterion for the location determination is thus the identifier of the respective radio cell in which the FCD vehicle resides. But that would generally be too rough a position. Therefore, it is recommended that the operating parameters of the mobile radio network used for location determination also include, for example, field strength information about other base stations receivable by the terminal at the current location. Of course, current signal transit times to the different base stations can be used for such an evaluation. However, it is by no means necessary to separately register the cell change, that is to say a transition of the FCD vehicle from one radio cell to an adjacent one, and to record the present time of the transition, as described in US Pat DE 196 38 070 A1 necessary is.

Grundsätzlich ist es möglich, die für die FCD-F unktion erforderliche Software einschließlich der benötigten Datenbasis (digitale Karte, Entscheidungsregeln) der Endeinrichtung über eine SIM-Karte zur Verfügung zu stellen. Mit besonderem Vorteil wird für das erfindungsgemäße Verfahren jedoch eine in das jeweilige FCD-Fahrzeug eingebaute digitale Freisprecheinrichtung benutzt, die mit der Endeinrichtung in der bestimmungsgemäßen Weise verbunden wird. Eine solche Endeinrichtung verfügt ohnehin über einen Prozessor zur digitalen Verarbeitung akustischer Signale. Dieser Prozessor kann in Verbindung mit einem entsprechenden Speichervolumen ohne weiteres mit dem erforderlichen Softwareprogramm einschließlich der Datenbasis beladen werden. Dies hat den großen Vorteil, dass zum einen von vornherein gewährleistet ist, dass die Freisprecheinrichtung in einem Fahrzeug und nicht etwa von einem Fußgänger mitgeführt wird, so dass uninteressante SMS-Meldungen von Fußgängern von vornherein ausgeschlossen werden können. Darüber hinaus wird für die Installation der Endeinrichtung bzw. der zu ihr gehörenden Freisprecheinrichtung kein zusätzlicher Aufwand wegen der Eigenschaft als Sensor zur Ermittlung von Verkehrsinformationen erforderlich. Der einzige gerätetechnische Aufwand ist darin zu sehen, dass die für die Verkehrsdatenerfassung notwendige Software in der Endeinrichtung bzw. der mit ihr verbundenen Freisprecheinrichtung gespeichert wird. Der Betriebsaufwand für das Verfahren bzw. das Betreiben der Endeinrichtung zum Zwecke der Verkehrslagedatenerfassung ist gering, da für eine ereignissabhänige Meldetätigkeit gesorgt ist und die einzelnen Verkehrslagedatenmeldungen über den kostengünstigen Weg von SMS-Meldungen zur Verkehrslageerfassungszentrale befördert werden.In principle, it is possible to provide the software required for the FCD function, including the required database (digital map, decision rules), of the terminal via a SIM card. With particular advantage, however, a built-in the respective FCD vehicle digital handsfree device is used for the inventive method, which is connected to the terminal in the intended manner. Such a terminal already has a processor for the digital processing of acoustic signals. This processor, in conjunction with a corresponding storage volume, can easily be loaded with the required software program including the database. This has the great advantage that on the one hand it is guaranteed from the outset that the hands-free system is carried in a vehicle and not by a pedestrian, so that uninteresting SMS messages can be excluded from pedestrians from the outset. In addition, no additional expense is required for the installation of the terminal device or the speakerphone belonging to it because of the property as a sensor for determining traffic information. The only equipment expense is the fact that the necessary for traffic data collection software is stored in the terminal or connected to it speakerphone. The operating costs for the process or the operation of the terminal for the purpose of traffic location data collection is low because of an event-dependent Logging is ensured and the individual traffic data messages are transported via the cost-effective route of SMS messages to the traffic situation detection center.

Claims (13)

  1. A method for acquiring data about traffic conditions in a road network which is covered by a plurality of base stations of a cellular mobile radio network and in which a plurality of vehicles are moving, each of which is provided with a mobile terminal device for the mobile radio network, wherein operating data that is generated during operation of the terminal device in contact with the base stations is employed to determine the current location of the terminal device in question, and wherein,
    - the terminal device is furnished with a digital map of the road network comprising a plurality of geographical points that are representative of the layout of the roads or of discrete route sections, the points or route sections being each associated with characteristic values of operating parameters of the mobile radio network,
    - the terminal device uses a software program to autonomously compare currently present operating parameters to the stored operating parameters of the digital map and to determine the current location of the terminal device on this basis,
    - the software program of the terminal device repeatedly ascertains a representative value for the speed of the vehicle,
    - the software program has access to stored driving profiles that are characteristic of certain types of roads and, based on a comparison of the actually driven driving profile of the vehicle, it determines the currently driven road type in order to increase the precision of the determination of the location,
    - the software program has access to stored rules to ensure that, under certain predefined circumstances (i.e. event-dependent), the terminal device transmits a message to a central station via the operating data channel of the mobile radio network, the message containing at least location and speed information about the vehicle, and
    - the central station evaluates the received messages in order to determine the traffic conditions.
  2. A method according to Claim 1,
    characterized in that
    the message additionally comprises time information.
  3. A method according to one of Claims 1 to 2,
    characterized in that
    the speed information is approximatively determined by the software program based on the distances of the locations of the vehicle determined at various points in time.
  4. A method according to one of Claims 1 to 2,
    characterized in that
    the speed information is obtained from the speedometer of the vehicle.
  5. A method according to one of Claims 1 to 4,
    characterized in that
    a message is transmitted when the software program ascertains a reduction of the vehicle speed below a predefined threshold value.
  6. A method according to one of Claims 1 to 5,
    characterized in that
    the operating parameters of the mobile radio network that are currently present in the terminal device comprise the identification of the base station that is currently yielding the highest field strength.
  7. A method according to Claim 6,
    characterized in that
    the operating parameters of the mobile radio network that are currently present in the terminal device also comprise field strength information that comes from other base stations and that can be received by the terminal device.
  8. A method according to one of Claims 1 to 7,
    characterized in that
    the operating parameters of the mobile radio network that are currently present in the terminal device comprise the current signal propagation times from the terminal device to various base stations.
  9. A method according to one of Claims 1 to 8,
    characterized in that
    the software program is stored on a SIM card of the terminal device.
  10. A method according to one of Claims 1 to 8,
    characterized in that
    the software program is stored in a processor of a digital hands-free device of the terminal device that is installed in the vehicle in question.
  11. A terminal device for a cellular mobile radio network for executing the method according to one of Claims 1 to 10, wherein
    - the terminal device is furnished with a digital map of the road network that comprises of a plurality of geographical points that are representative of the layout of the roads or discrete route sections, wherein the points or route sections being each associated with characteristic values of operating parameters of the mobile radio network,
    - the terminal device is provided with an additional software program that autonomously compares currently present operating parameters to the stored operating parameters of the digital map and, on this basis, determines the current location of the terminal device, and it repeatedly ascertains a representative value for the speed of the vehicle,
    - the software program has access to stored driving profiles that are characteristic of certain types of roads and, based on a comparison of the actually driven driving profile of the vehicle, it determines the currently driven road type in order to increase the precision of the determination of the location,
    - the software program has access to stored rules to ensure that, under certain predefined conditions, the terminal device transmits a message to a central station via the operating data channel of the mobile radio network, the message containing at least location and speed information about the vehicle.
  12. A terminal device according to Claim 11,
    characterized in that
    the additional software program is stored on a SIM card of the terminal device.
  13. A terminal device according to Claim 11,
    characterized in that
    the software program is stored in the processor of a digital hands-free device that is installed in the vehicle.
EP01992987A 2000-10-30 2001-10-09 Method for acquiring traffic data in a road network and terminal Expired - Lifetime EP1330803B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10054375 2000-10-30
DE10054375A DE10054375A1 (en) 2000-10-30 2000-10-30 Method for recording traffic situation data in a traffic route network and terminal equipment
PCT/DE2001/003874 WO2002037444A1 (en) 2000-10-30 2001-10-09 Method for acquiring traffic data in a road network and terminal

Related Child Applications (1)

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EP09013064.2 Division-Into 2009-10-15

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EP1330803B1 true EP1330803B1 (en) 2010-12-08

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AT (1) ATE491197T1 (en)
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DE (2) DE10054375A1 (en)
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WO (1) WO2002037444A1 (en)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2019147018A1 (en) * 2018-01-23 2019-08-01 Samsung Electronics Co., Ltd. Method of receiving map and server apparatus therefor

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Publication number Priority date Publication date Assignee Title
IL150894A0 (en) * 2002-07-24 2003-04-10 A method for measuring road traffic load based on analyzing cellular communications
AT500123B1 (en) * 2003-08-28 2007-01-15 Oesterreichisches Forschungs U METHOD AND ARRANGEMENT FOR DETERMINING THE ROUTES OF TRANSPORT PARTICIPANTS
DE102005061419B4 (en) * 2005-12-22 2014-01-09 Volkswagen Ag Method for transmitting traffic-related information
CN110099405B (en) * 2019-05-28 2022-03-18 中国联合网络通信集团有限公司 Network coverage assessment method and device

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Publication number Priority date Publication date Assignee Title
DE3827352C2 (en) * 1988-08-12 1996-03-07 Bosch Gmbh Robert Method for determining the current location of a mobile radio station
DE3926180A1 (en) * 1989-08-08 1991-02-14 Bosch Gmbh Robert METHOD FOR DRIVING ROUTE-SELECTIVE PLAYBACK DIGITALLY CODED TRAFFIC MESSAGES TRANSMITTED FROM A TRANSMITTER TO A VEHICLE RECEIVER AND VEHICLE RECEIVER
DE19755875A1 (en) * 1996-12-09 1998-06-10 Mannesmann Ag Method for transmitting location data and measurement data from a terminal, in particular a telematics terminal to a traffic control center

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019147018A1 (en) * 2018-01-23 2019-08-01 Samsung Electronics Co., Ltd. Method of receiving map and server apparatus therefor
US11188093B2 (en) 2018-01-23 2021-11-30 Samsung Electronics Co., Ltd. Method of receiving map and server apparatus therefor

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ATE491197T1 (en) 2010-12-15
AU2002221523A1 (en) 2002-05-15
ES2355130T3 (en) 2011-03-23
EP1330803A1 (en) 2003-07-30
DE10054375A1 (en) 2002-05-16
WO2002037444A1 (en) 2002-05-10
DE50115737D1 (en) 2011-01-20

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