EP0927498A1 - Method to determine location of a mobile radio station and base station for transmission of local information - Google Patents

Method to determine location of a mobile radio station and base station for transmission of local information

Info

Publication number
EP0927498A1
EP0927498A1 EP97941787A EP97941787A EP0927498A1 EP 0927498 A1 EP0927498 A1 EP 0927498A1 EP 97941787 A EP97941787 A EP 97941787A EP 97941787 A EP97941787 A EP 97941787A EP 0927498 A1 EP0927498 A1 EP 0927498A1
Authority
EP
European Patent Office
Prior art keywords
station
mobile radio
base station
radio station
radiation
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP97941787A
Other languages
German (de)
French (fr)
Inventor
Auke Nauta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0927498A1 publication Critical patent/EP0927498A1/en
Withdrawn legal-status Critical Current

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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

Definitions

  • the invention is based on a method for determining the location of a mobile radio station according to the preamble of independent claim 1 and on a fixed station for transmitting location information according to the preamble of independent claim 6.
  • a method for determining the approximate location of a mobile device is already known from EP 0 290 725 B1
  • Radio station known in a cellular radio telephone network with mobile radio stations and with one fixed station per radio cell.
  • the individual base station numbers of the base stations are transmitted to the mobile operators operating in the radio area of the base stations using data telegrams
  • Radio stations communicated.
  • the base station number serves as location information.
  • the method according to the invention with the features of independent claim 1 has the advantage that at least two differently coded signals are emitted by the antenna in different directions from the base station, so that the radiation area of the base station is divided into corresponding radiation fields which do not significantly overlap, whereby depending on the location of the mobile radio station in the radiation field of one of the antennas, the signal emitted by the corresponding antenna is received by the mobile radio station.
  • the direction in which the mobile radio station is located with respect to the base station can also be determined, no additional stations being required, but only an existing base station having to be equipped with corresponding directional antennas.
  • Radio station received signal to the station. In this way, no signal processing is required in the mobile radio station, so that hardware and software expenditure and thus costs are saved.
  • the determination of the movement of the mobile radio station in the radiation area of the base station is particularly advantageous, if differently coded signals are received in the mobile radio station within a predetermined period of time. In this way, in addition to static localization, dynamic localization and thus an improved determination of the location of the mobile radio station is also possible.
  • a further improvement in the localization of the mobile radio station results advantageously from the fact that the direction of movement of the mobile radio station in the radiation area of the base station is also determined depending on the arrival of the differently coded signals in the mobile radio station.
  • the base station according to the invention with the features of independent claim 6 has the advantage that at least two antennas are provided which radiate radio signals in different directions so that the radiation area of the base station is divided into corresponding radiation fields which do not significantly overlap, such that the antennas with a code Generating means are connected and that the code generating means emits radio signals to the antennas, each with a different coding. In this way, the location of a mobile
  • Radio station in one of the radiation fields and the movement the mobile radio station can be determined from one radiation field into another radiation field.
  • 10 denotes a base station which comprises a code generating means 40.
  • a first transmission antenna 15 and a second transmission antenna 20 are connected to the code generating means 40.
  • the two transmission antennas 15 and 20 are directed in the opposite direction, the first transmission antenna 15 supplying a first radiation field 25 and the second transmission antenna 20 supplying a second radiation field 30.
  • the two radiation fields 25 and 30 do not significantly overlap and together form the radiation area 5 of the fixed station 10.
  • a mobile radio station 1 is located in the second radiation field 30, the mobile radio station 1 carrying out a movement from the first radiation field 25 into the second radiation field 30.
  • the mobile radio station 1 is therefore shown in dashed lines in the first radiation field 25, and the movement of the mobile radio station 1 from the first
  • Radiation field 25 into the second radiation field 30 is represented by a solid arrow.
  • the mobile Radio station 1 is connected to a transmission / reception antenna 45 which receives 25 radio signals from the first transmission antenna 15 in the first radiation field and 30 radio signals from the second transmission antenna 20 in the second radiation field 30.
  • the mobile radio station 1 in turn transmits both from the first
  • the transmission of the radio signals is shown in the figure by dashed arrows.
  • the station 35 is provided with a receiving antenna 50.
  • the code generating means 40 generates radio signals with a first coding and radio signals with a second
  • the code generating means 40 emits the radio signals with the first coding to the first transmitting antenna 15 and the radio signals with the second coding to the second transmitting antenna 20 for radiation.
  • the radio signals with the first coding can be received in the first radiation field 25 and the radio signals with the second coding can be received in the adjacent second radiation field 30 of the base station 10.
  • the coding thus already represents location information, so that different radiation fields are characterized by different coding. If the mobile radio station 1 moves through the first radiation field 25, it receives radio signals with the first coding. Via its transmitting / receiving antenna 45, the mobile radio station 1 then sends a message to the station 35 as a function of the coding of the received signal.
  • the mobile radio station 1 can do this by coding the received signal Signals the location information about the stay in the first radiation field 25 are derived so that the message sent to the station 35 already contains this location information. However, it is also possible for the mobile radio station 1 to forward the received signal to the station 35 unprocessed, so that the location information in the station 35 must be derived from the coding of this signal.
  • the station 35 is preferably stationary and, in the exemplary embodiment described, is the center of a monitoring system. However, it is also possible to carry out the station 35 in a mobile manner in order to be able to exercise non-stationary control over the mobile radio station 1 in this way. In any case, the location of the mobile station is determined in the station 35 on the basis of the message transmitted by the mobile radio station 1
  • Radio station 1 is determined in one of the two radiation fields 25 and 30. If the message contains signals with the first coding, for example, the first radiation field 25 is determined in the station 35 as the location of the mobile radio station 1. In the event that appropriate location information has already been derived in the mobile radio station 1 from the received signal with the first coding and sent to the station 35 as a message, the station 35 also determines the first radiation field 25 from this location information as the location of the mobile radio station 1 .
  • the mobile radio station 1 Due to the different coding of the radio signals emitted via the first transmission antenna 15 and via the second transmission antenna 20, in addition to the location of the mobile radio station 1 in one of the two radiation fields 25 and 30 of the radiation area 5, it is also possible for the mobile radio station 1 to move in the radiation area 5 of the base station 10 determine when the mobile radio station 1 changes the radiation field. In this case, differently coded signals are received in the mobile radio station 1 within a predetermined period of time. If the mobile radio station 1 moves from the first radiation field 25 into the second radiation field 30, first radio signals with the first coding and then radio signals with the second coding are received. Are therefore both within the predetermined period in the station 35 for the mobile radio station 1
  • Radiation fields 25 and 30 determined as a location the station 35 detects a movement of the mobile radio station 1 in the radiation area 5 of the base station 10 during the predetermined period. In the example shown in the figure, this is a movement from the first
  • Radiation field 25 into the second radiation field 30 If the times of arrival of the differently coded signals in the mobile radio station 1 are also detected and taken into account in the station 35, the direction of movement of the mobile radio station 1 can also be determined
  • station 35 first receives the message from mobile radio station 1 about its presence in first radiation field 25 and then a corresponding message about its presence in second radiation field 30. From this station 35 can then determine the movement of the mobile radio station 1 from the first radiation field 25 into the second Derive radiation field 30. To check the direction of movement of the mobile radio station 1, the determined direction of movement in the station 35 can be compared with a predetermined direction of movement. If the direction of movement of the mobile radio station 1 does not correspond to the specified direction of movement, the station 35 triggers an alarm.
  • the method can thus be used particularly advantageously in surveillance systems in which a guard is equipped with a mobile radio device 1 and, for example, takes a predetermined tour of a building to be guarded.
  • Fixed stations 10 are installed on the doors or passageways to be passed, so that in station 35, which can be located in a security center, in addition to the location on one of the two sides of the corresponding passageway, the direction in which the Security guard passes through the appropriate passage. If this direction does not correspond to the specified direction, an alarm is triggered in station 35. Should one of the two transmitting antennas 15 and 20 fail, there is still a limited possibility for determining the location of the mobile radio station 1 in the radiation field of the still intact transmitting antenna. However, direction of movement can no longer be determined in station 35. This can then be used as an indication that an error has occurred in the monitoring system, so that in this way it is possible to control the functionality of the fixed stations 10 installed in the system. When using several fixed stations 10, for example in the monitoring system described, the differ
  • more than two transmitting antennas can also be provided for the base station 10, which likewise each emit differently coded radio signals in different directions in such a way that the radiation area 5 of the base station 10 is divided into corresponding radiation fields which do not significantly overlap. In this way, the location, movement and direction of movement of the mobile radio station 1 in the radiation area 5 of the base station 10 can be determined even more precisely.

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

Abstract

Disclosed is a method to determine location of a mobile radio station (1) in the radiation area (5) of at least one base station (10). Base station (10) transmits at least two differently coded signals from two antennae (15, 20) in different directions so that radiation area (5) of base station is divided up into corresponding minor-overlapping radiation fields (25, 30). According to location of mobile radio station (1) in radiation field (25, 30) of one of the antennae (15, 20) the signal transmitted by the corresponding antenna (15, 20) is received by the mobile station (1). Information is transmitted, preferably to a base station (35), according to coding of signal received. Location of mobile station is determined in said station (35) according to the information. Also disclosed is a base station (10) which is used to transmit local information in a radiation area (5). At least two antennae (15, 20) are provided to transmit radio signals in different directions so that the radiation area (5) of the base station (10) is divided up into corresponding minor-overlapping radiation fields (25,30). The antennae (15,20) are connected to a means of producing code (40). Said means (40) provides antennae (15,20) with radio signals presenting a different coding.

Description

Verfahren zum Bestimmen des Aufenthaltsortes einer mobilen Funkstation und Feststation zur Aussendunσ von OrtsInformationenMethod for determining the location of a mobile radio station and base station for transmitting location information
Stand der TechnikState of the art
Die Erfindung geht von einem Verfahren zum Bestimmen des Aufenthaltsortes einer mobilen Funkstation nach der Gattung des unabhängigen Anspruchs 1 und von einer Feststation zur Aussendung von Ortsinformationen nach der Gattung des unabhängigen Anspruchs 6 aus .The invention is based on a method for determining the location of a mobile radio station according to the preamble of independent claim 1 and on a fixed station for transmitting location information according to the preamble of independent claim 6.
Aus der EP 0 290 725 Bl ist bereits ein Verfahren zum Bestimmen des ungefähren Aufenthaltsortes einer mobilenA method for determining the approximate location of a mobile device is already known from EP 0 290 725 B1
Funkstation in einem zellularen Funktelephonnetz mit mobilen Funkstationen und mit einer Feststation je Funkzelle bekannt. Die individuellen FestStationsnummern der Feststationen werden mittels Datentelegrammen den im Funkbereich der Feststationen operierenden mobilenRadio station known in a cellular radio telephone network with mobile radio stations and with one fixed station per radio cell. The individual base station numbers of the base stations are transmitted to the mobile operators operating in the radio area of the base stations using data telegrams
Funkstationen mitgeteilt. Dabei dient die Feststationsnummer als Ortsinformation. Eine in dem von der Feststation an die mobile Funkstation ausgesendeten Datentelegramm enthaltene Feldstärkeinformation, die ein Maß für die bei der Feststation empfangene Feldstärke der mobilen Funkstation ist, dient als zusätzliche Standortinformation. Vorteile der ErfindungRadio stations communicated. The base station number serves as location information. A field strength information contained in the data telegram sent from the base station to the mobile radio station, which is a measure of the field strength of the mobile radio station received at the base station, serves as additional location information. Advantages of the invention
Das erfindungsgemäße Verfahren mit den Merkmalen des unabhängigen Anspruchs 1 hat demgegenüber den Vorteil, daß von der Feststation mindestens zwei unterschiedlich kodierte Signale von jeweils einer Antenne in unterschiedliche Richtungen abgestrahlt werden, so daß der Strahlungsbereich der Feststation in entsprechende nicht nennenswert überlappende Strahlungsfelder aufgeteilt wird, wobei je nach Standort der mobilen Funkstation im Strahlungsfeld einer der Antennen das von der entsprechenden Antenne abgestrahlte Signal von der mobilen Funkstation empfangen wird. Auf diese Weise läßt sich auch die Richtung bestimmen, in der sich die mobile Funkstation bezüglich der Feststation befindet, wobei keine zusätzlichen Stationen erforderlich sind, sondern lediglich eine vorhandene Feststation mit entsprechenden Richtantennen auszustatten ist.The method according to the invention with the features of independent claim 1 has the advantage that at least two differently coded signals are emitted by the antenna in different directions from the base station, so that the radiation area of the base station is divided into corresponding radiation fields which do not significantly overlap, whereby depending on the location of the mobile radio station in the radiation field of one of the antennas, the signal emitted by the corresponding antenna is received by the mobile radio station. In this way, the direction in which the mobile radio station is located with respect to the base station can also be determined, no additional stations being required, but only an existing base station having to be equipped with corresponding directional antennas.
Durch die in den Ansprüchen 2 bis 5 aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen des im unabhängigen Anspruch 1 angegebenen Verfahrens möglich.Advantageous further developments and improvements of the method specified in independent claim 1 are possible through the measures listed in claims 2 to 5.
Vorteilhaft ist die Weiterleitung des in der mobilenThe forwarding of the in the mobile is advantageous
Funkstation empfangenen Signals an die Station. Auf diese Weise ist in der mobilen Funkstation keine Signalverarbeitung erforderlich, so daß dort Hard- und Softwareaufwand und damit Kosten eingespart werden.Radio station received signal to the station. In this way, no signal processing is required in the mobile radio station, so that hardware and software expenditure and thus costs are saved.
Besonders vorteilhaft ist die Ermittlung der Bewegung der mobilen Funkstation im Strahlungsbereich der Feststation, wenn innerhalb eines vorgegebenen Zeitraumes unterschiedlich kodierte Signale in der mobilen Funkstation empfangen werden. Auf diese Weise ist zusätzlich zur statischen Lokalisierung auch eine dynamische Lokalisierung und damit eine verbesserte Bestimmung des Aufenthaltsortes der mobilen Funkstation möglich.The determination of the movement of the mobile radio station in the radiation area of the base station is particularly advantageous, if differently coded signals are received in the mobile radio station within a predetermined period of time. In this way, in addition to static localization, dynamic localization and thus an improved determination of the location of the mobile radio station is also possible.
Eine weitere Verbesserung der Lokalisierung der mobilen Funkstation ergibt sich in vorteilhafter Weise dadurch, daß auch die Bewegungsrichtung der mobilen Funkstation im Strahlungsbereich der Feststation in Abhängigkeit des zeitlichen Eintreffens der unterschiedlich kodierten Signale in der mobilen Funkstation ermittelt wird.A further improvement in the localization of the mobile radio station results advantageously from the fact that the direction of movement of the mobile radio station in the radiation area of the base station is also determined depending on the arrival of the differently coded signals in the mobile radio station.
Vorteilhaft ist auch die Auslösung eines Alarms, wenn eine ermittelte Bewegungsrichtung der mobilen Funkstation nicht einer vorgegebenen Bewegungsrichtung entspricht. Auf diese Weise kann das Verfahren auch für Überwachungszwecke eingesetzt werden.It is also advantageous to trigger an alarm if a determined direction of movement of the mobile radio station does not correspond to a predetermined direction of movement. In this way, the method can also be used for monitoring purposes.
Die erfindungsgemäße Feststation mit den Merkmalen des unabhängigen Anspruchs 6 hat den Vorteil, daß mindestens zwei Antennen vorgesehen sind, die Funksignale in unterschiedliche Richtungen so abstrahlen, daß der Strahlungsbereich der Feststation in entsprechende nicht nennenswert überlappende Strahlungsfelder aufgeteilt ist, daß die Antennen mit einem Code-Erzeugungsmittel verbunden sind und daß das Code-Erzeugungsmittel an die Antennen Funksignale mit jeweils unterschiedlicher Kodierung abgibt. Auf diese Weise kann der Aufenthaltsort einer mobilenThe base station according to the invention with the features of independent claim 6 has the advantage that at least two antennas are provided which radiate radio signals in different directions so that the radiation area of the base station is divided into corresponding radiation fields which do not significantly overlap, such that the antennas with a code Generating means are connected and that the code generating means emits radio signals to the antennas, each with a different coding. In this way, the location of a mobile
Funkstation in einem der Strahlungsfelder und die Bewegung der mobilen Funkstation von einem Strahlungsfeld in ein anderes Strahlungsfeld ermittelt werden.Radio station in one of the radiation fields and the movement the mobile radio station can be determined from one radiation field into another radiation field.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigt die einzige Figur den Strahlungsbereich einer Feststation und die Übertragung von Signalen zwischen der Feststation, einer mobilen Funkstation und einer weiteren Station.An embodiment of the invention is shown in the drawing and explained in more detail in the following description. The only figure shows the radiation area of a base station and the transmission of signals between the base station, a mobile radio station and another station.
Beschreibung des AusführungsbeispielsDescription of the embodiment
In der Figur kennzeichnet 10 eine Feststation, die ein Code- Erzeugungsmittel 40 umfaßt. An das Code-Erzeugungsmittel 40 ist eine erste Sendeantenne 15 und eine zweite Sendeantenne 20 angeschlossen. Die beiden Sendeantennen 15 und 20 sind dabei in entgegengesetzte Richtung gerichtet, wobei die erste Sendeantenne 15 ein erstes Strahlungsfeld 25 und die zweite Sendeantenne 20 ein zweites Strahlungsfeld 30 versorgen. Die beiden Strahlungsfelder 25 und 30 überlappen sich nicht nennenswert und bilden zusammen den Strahlungsbereich 5 der Feststation 10. Eine mobile Funkstation 1 befindet sich im zweiten Strahlungsfeld 30, wobei die mobile Funkstation 1 eine Bewegung vom ersten Strahlungsfeld 25 in das zweite Strahlungsfeld 30 durchführt. Im ersten Strahlungsfeld 25 ist die mobile Funkstation 1 daher gestrichelt dargestellt, und die Bewegung der mobilen Funkstation 1 vom erstenIn the figure, 10 denotes a base station which comprises a code generating means 40. A first transmission antenna 15 and a second transmission antenna 20 are connected to the code generating means 40. The two transmission antennas 15 and 20 are directed in the opposite direction, the first transmission antenna 15 supplying a first radiation field 25 and the second transmission antenna 20 supplying a second radiation field 30. The two radiation fields 25 and 30 do not significantly overlap and together form the radiation area 5 of the fixed station 10. A mobile radio station 1 is located in the second radiation field 30, the mobile radio station 1 carrying out a movement from the first radiation field 25 into the second radiation field 30. The mobile radio station 1 is therefore shown in dashed lines in the first radiation field 25, and the movement of the mobile radio station 1 from the first
Strahlungsfeld 25 in das zweite Strahlungsfeld 30 ist durch einen durchgezogenen Pfeil dargestellt. Die mobile Funkstation 1 ist mit einer Sende-/Empfangsantenne 45 verbunden, die im ersten Strahlungsfeld 25 Funksignale von der ersten Sendeantenne 15 und im zweiten Strahlungsfeld 30 Funksignale von der zweiten Sendeantenne 20 empfängt. Die mobile Funkstation 1 wiederum sendet sowohl vom erstenRadiation field 25 into the second radiation field 30 is represented by a solid arrow. The mobile Radio station 1 is connected to a transmission / reception antenna 45 which receives 25 radio signals from the first transmission antenna 15 in the first radiation field and 30 radio signals from the second transmission antenna 20 in the second radiation field 30. The mobile radio station 1 in turn transmits both from the first
Strahlungsfeld 25 als auch vom zweiten Strahlungsfeld 30 aus Funksignale an eine Station 35 außerhalb desRadiation field 25 and radio signals from the second radiation field 30 to a station 35 outside the
Strahlungsbereichs 5 der Feststation 10. Die Übertragung der Funksignale ist in der Figur durch gestrichelte Pfeile dargestellt. Zum Empfang der Funksignale von der mobilen Funkstation 1 ist die Station 35 mit einer Empfangsantenne 50 versehen.Radiation area 5 of the base station 10. The transmission of the radio signals is shown in the figure by dashed arrows. To receive the radio signals from the mobile radio station 1, the station 35 is provided with a receiving antenna 50.
Das Code-Erzeugungsmittel 40 erzeugt Funksignale mit einer ersten Kodierung und Funksignale mit einer zweitenThe code generating means 40 generates radio signals with a first coding and radio signals with a second
Kodierung, die von der ersten Kodierung verschieden ist. Das Code-Erzeugungsmittel 40 gibt die Funksignale mit der ersten Kodierung an die erste Sendeantenne 15 und die Funksignale mit der zweiten Kodierung an die zweite Sendeantenne 20 jeweils zur Abstrahlung ab. Die Funksignale mit der ersten Kodierung sind dabei im ersten Strahlungsfeld 25 und die Funksignale mit der zweiten Kodierung sind im benachbarten zweiten Strahlungsfeld 30 der Feststation 10 empfangbar. Die Kodierung stellt somit bereits eine Ortsinformation dar, so daß unterschiedliche Strahlungsfelder durch unterschiedliche Kodierung gekennzeichnet sind. Bewegt sich die mobile Funkstation 1 durch das erste Strahlungsfeld 25, so empfängt es Funksignale mit der ersten Kodierung. Über ihre Sende- /Empfangsan enne 45 sendet die mobile Funkstation 1 daraufhin in Abhängigkeit von der Kodierung des empfangenen Signals eine Nachricht an die Station 35. Dabei kann in der mobilen Funkstation 1 aus der Kodierung des empfangenen Signals die OrtsInformation über den Aufenthalt in dem ersten Strahlungsfeld 25 abgeleitet werden, so daß die an die Station 35 gesendete Nachricht bereits diese Ortsinformation enthält. Es ist jedoch auch möglich, daß die mobile Funkstation 1 das empfangene Signal unverarbeitet an die Station 35 weiterleitet, so daß in der Station 35 die Ortsinformation aus der Kodierung dieses Signals abgeleitet werden muß. Die Station 35 ist dabei vorzugsweise ortsfest und stellt in dem beschriebenen Ausführungsbeispiel die Zentrale eines ÜberwachungsSystems dar. Es ist jedoch auch möglich, die Station 35 mobil auszuführen, um auf diese Weise eine nicht ortsgebundene Kontrolle über die mobile Funkstation 1 ausüben zu können. In der Station 35 wird jedenfalls anhand der von der mobilen Funkstation 1 übermittelten Nachricht der Aufenthaltsort der mobilenCoding that is different from the first coding. The code generating means 40 emits the radio signals with the first coding to the first transmitting antenna 15 and the radio signals with the second coding to the second transmitting antenna 20 for radiation. The radio signals with the first coding can be received in the first radiation field 25 and the radio signals with the second coding can be received in the adjacent second radiation field 30 of the base station 10. The coding thus already represents location information, so that different radiation fields are characterized by different coding. If the mobile radio station 1 moves through the first radiation field 25, it receives radio signals with the first coding. Via its transmitting / receiving antenna 45, the mobile radio station 1 then sends a message to the station 35 as a function of the coding of the received signal. The mobile radio station 1 can do this by coding the received signal Signals the location information about the stay in the first radiation field 25 are derived so that the message sent to the station 35 already contains this location information. However, it is also possible for the mobile radio station 1 to forward the received signal to the station 35 unprocessed, so that the location information in the station 35 must be derived from the coding of this signal. The station 35 is preferably stationary and, in the exemplary embodiment described, is the center of a monitoring system. However, it is also possible to carry out the station 35 in a mobile manner in order to be able to exercise non-stationary control over the mobile radio station 1 in this way. In any case, the location of the mobile station is determined in the station 35 on the basis of the message transmitted by the mobile radio station 1
Funkstation 1 in einem der beiden Strahlungsfelder 25 und 30 ermittelt. Enthält also die Nachricht beispielsweise Signale mit der ersten Kodierung, so wird in der Station 35 als Aufenthaltsort der mobilen Funkstation 1 das erste Strahlungsfeld 25 ermittelt. Für den Fall, daß in der mobilen Funkstation 1 aus dem empfangenen Signal mit der ersten Kodierung bereits entsprechende Ortsinformationen abgeleitet und an die Station 35 als Nachricht gesendet wurden, ermittelt die Station 35 aus diesen OrtsInformationen ebenfalls als Aufenthaltsort der mobilen Funkstation 1 das erste Strahlungsfeld 25.Radio station 1 is determined in one of the two radiation fields 25 and 30. If the message contains signals with the first coding, for example, the first radiation field 25 is determined in the station 35 as the location of the mobile radio station 1. In the event that appropriate location information has already been derived in the mobile radio station 1 from the received signal with the first coding and sent to the station 35 as a message, the station 35 also determines the first radiation field 25 from this location information as the location of the mobile radio station 1 .
Entsprechendes gilt für den Empfang von Funksignalen mit der zweiten Kodierung in der mobilen Funkstation 1 bei Aufenthalt im zweiten Strahlungsfeld 30. Aufgrund der unterschiedlichen Kodierung der über die erste Sendeantenne 15 und über die zweite Sendeantenne 20 abgestrahlten Funksignale läßt sich neben dem Aufenthaltsort der mobilen Funkstation 1 in einem der beiden Strahlungsfelder 25 und 30 des Strahlungsbereichs 5 auch eine Bewegung der mobilen Funkstation 1 im Strahlungsbereich 5 der Feststation 10 ermitteln, wenn die mobile Funkstation 1 das Strahlungsfeld wechselt. In diesem Fall werden innerhalb eines vorgegebenen Zeitraums in der mobilen Funkstation 1 unterschiedlich kodierte Signale empfangen. Bewegt sich die mobile Funkstation 1 vom ersten Strahlungsfeld 25 in das zweite Strahlungsfeld 30, so werden zunächst Funksignale mit der ersten Kodierung und anschließend Funksignale mit der zweiten Kodierung empfangen. Werden daher innerhalb des vorgegebenen Zeitraums in der Station 35 für die mobile Funkstation 1 beideThe same applies correspondingly to the reception of radio signals with the second coding in the mobile radio station 1 when staying in the second radiation field 30. Due to the different coding of the radio signals emitted via the first transmission antenna 15 and via the second transmission antenna 20, in addition to the location of the mobile radio station 1 in one of the two radiation fields 25 and 30 of the radiation area 5, it is also possible for the mobile radio station 1 to move in the radiation area 5 of the base station 10 determine when the mobile radio station 1 changes the radiation field. In this case, differently coded signals are received in the mobile radio station 1 within a predetermined period of time. If the mobile radio station 1 moves from the first radiation field 25 into the second radiation field 30, first radio signals with the first coding and then radio signals with the second coding are received. Are therefore both within the predetermined period in the station 35 for the mobile radio station 1
Strahlungsfelder 25 und 30 als Aufenthaltsort ermittelt, so stellt die Station 35 eine Bewegung der mobilen Funkstation 1 im Strahlungsbereich 5 der Feststation 10 während des vorgegebenen Zeitraums fest. In dem in der Figur dargestellten Beispiel handelt es sich dabei um eine Bewegung vom erstenRadiation fields 25 and 30 determined as a location, the station 35 detects a movement of the mobile radio station 1 in the radiation area 5 of the base station 10 during the predetermined period. In the example shown in the figure, this is a movement from the first
Strahlungsfeld 25 in das zweite Strahlungsfeld 30. Werden in der Station 35 auch die Zeitpunkte des Eintreffens der unterschiedlich kodierten Signale in der mobilen Funkstation 1 erfaßt und berücksichtigt, so läßt sich auch die Bewegungsrichtung der mobilen Funkstation 1 imRadiation field 25 into the second radiation field 30. If the times of arrival of the differently coded signals in the mobile radio station 1 are also detected and taken into account in the station 35, the direction of movement of the mobile radio station 1 can also be determined
Strahlungsbereich 5 der Feststation 10 ermitteln. In dem in der Figur dargestellten Beispiel erhält die Station 35 zunächst die Nachricht von der mobilen Funkstation 1 über deren Aufenthalt im ersten Strahlungsfeld 25 und anschließend eine entsprechende Nachricht über ihren Aufenthalt im zweiten Strahlungsfeld 30. Daraus kann die Station 35 dann die Bewegung der mobilen Funkstation 1 vom ersten Strahlungsfeld 25 ins zweite Strahlungsfeld 30 ableiten. Zur Kontrolle der Bewegungsrichtung der mobilen Funkstation 1 kann die ermittelte Bewegungsrichtung in der Station 35 mit einer vorgegebenen Bewegungsrichtung verglichen werden. Entspricht dabei die Bewegungsrichtung der mobilen Funkstation 1 nicht der vorgegebenen Bewegungsrichtung, so wird von der Station 35 ein Alarm ausgelöst.Determine radiation area 5 of base station 10. In the example shown in the figure, station 35 first receives the message from mobile radio station 1 about its presence in first radiation field 25 and then a corresponding message about its presence in second radiation field 30. From this station 35 can then determine the movement of the mobile radio station 1 from the first radiation field 25 into the second Derive radiation field 30. To check the direction of movement of the mobile radio station 1, the determined direction of movement in the station 35 can be compared with a predetermined direction of movement. If the direction of movement of the mobile radio station 1 does not correspond to the specified direction of movement, the station 35 triggers an alarm.
Das Verfahren kann somit besonders vorteilhaft in Überwachungssystemen eingesetzt werden, bei denen eine Wachperson mit einem mobilen Funkgerät 1 ausgerüstet ist und beispielsweise einen vorgegebenen Rundgang durch ein zu bewachendes Gebäude durchführt. Dabei werden an den zu passierenden Türen oder Durchgängen FestSta ionen 10 installiert, so daß in der Station 35, die in einer Wachzentrale untergebracht sein kann, neben dem Aufenthaltsort auf einer der beiden Seiten des entsprechenden Durchgangs auch die Richtung kontrolliert werden kann, in der die Wachperson den entsprechenden Durchgang passiert. Entspricht diese Richtung nicht der vorgegebenen Richtung, so wird in der Station 35 Alarm ausgelöst. Sollte eine der beiden Sendeantennen 15 und 20 ausfallen, so besteht immer noch eine eingeschränkte Möglichkeit zur Bestimmung des Aufenthaltsorts der mobilen Funkstation 1 in dem Strahlungsfeld der noch intakten Sendeantenne. Allerdings kann in der Station 35 keine Bewegungsrichtung mehr ermittelt werden. Dies kann dann als Anzeichen dafür verwendet werden, daß ein Fehler im Überwachungssystem aufgetreten ist, so daß auf diese Weise eine Kontrolle über die Funktionsfähigkeit der im System installierten Feststationen 10 möglich ist. Bei der Verwendung von mehreren Feststationen 10 beispielsweise in dem beschriebenen Überwachungssystem unterscheiden sich dieThe method can thus be used particularly advantageously in surveillance systems in which a guard is equipped with a mobile radio device 1 and, for example, takes a predetermined tour of a building to be guarded. Fixed stations 10 are installed on the doors or passageways to be passed, so that in station 35, which can be located in a security center, in addition to the location on one of the two sides of the corresponding passageway, the direction in which the Security guard passes through the appropriate passage. If this direction does not correspond to the specified direction, an alarm is triggered in station 35. Should one of the two transmitting antennas 15 and 20 fail, there is still a limited possibility for determining the location of the mobile radio station 1 in the radiation field of the still intact transmitting antenna. However, direction of movement can no longer be determined in station 35. This can then be used as an indication that an error has occurred in the monitoring system, so that in this way it is possible to control the functionality of the fixed stations 10 installed in the system. When using several fixed stations 10, for example in the monitoring system described, the differ
Kodierungen der von den Sendeantennen 15 und 20 abzustrahlenden Funksignale nicht nur untereinander, sondern auch zwischen den einzelnen Feststationen 10. Auf diese Weise sind Aufenthaltsort und Bewegungsrichtung der mobilen Funkstation l von der Station 35 eindeutig ermittelbar.Codings of the radio signals to be emitted by the transmission antennas 15 and 20 not only with one another, but also between the individual base stations 10. In this way, the location and direction of movement of the mobile radio station 1 can be clearly determined by the station 35.
In einem weiteren Ausführungsbeispiel können auch mehr als zwei Sendeantennen für die Feststation 10 vorgesehen sein, die ebenfalls jeweils unterschiedlich kodierte Funksignale so in unterschiedlicher Richtung abstrahlen, daß der Strahlungsbereich 5 der Feststation 10 in entsprechende nicht nennenswert überlappende Strahlungsfelder aufgeteilt wird. Auf diese Weise lassen sich Aufenthaltsort, Bewegung und Bewegungsrichtung der mobilen Funkstation 1 im Strahlungsbereich 5 der Feststation 10 noch genauer ermitteln. In a further exemplary embodiment, more than two transmitting antennas can also be provided for the base station 10, which likewise each emit differently coded radio signals in different directions in such a way that the radiation area 5 of the base station 10 is divided into corresponding radiation fields which do not significantly overlap. In this way, the location, movement and direction of movement of the mobile radio station 1 in the radiation area 5 of the base station 10 can be determined even more precisely.

Claims

Ansprüche Expectations
1. Verfahren zum Bestimmen des Aufenthaltsortes einer mobilen Funkstation (1) im Strahlungsbereich (5) mindestens einer Feststation (10), dadurch gekennzeichnet, daß von der Feststation (10) mindestens zwei unterschiedlich codierte Signale von jeweils einer Antenne (15, 20) in unterschiedliche Richtung abgestrahlt werden, so daß der1. A method for determining the location of a mobile radio station (1) in the radiation area (5) at least one base station (10), characterized in that the base station (10) has at least two differently coded signals from an antenna (15, 20) in each different direction are emitted, so that the
Strahlungsbereich (5) der Feststation (10) in entsprechende nicht nennenswert überlappende Strahlungsfelder (25, 30) aufgeteilt wird, daß je nach Standort der mobilen Funkstation (1) im Strahlungsfeld (25, 30) einer der Antennen (15, 20) das von der entsprechenden Antenne (15, 20) abgestrahlte Signal von der mobilen Funkstation (1) empfangen wird, daß in Abhängigkeit von der Codierung des empfangenen Signals eine Nachricht an eine vorzugsweise ortsfeste Station (35) weitergesendet wird und daß in der Station (35) der Aufenthaltsort der mobilen Funkstation (1) in Abhängigkeit von der Nachricht ermittelt wird.Radiation area (5) of the base station (10) is divided into corresponding radiation fields (25, 30) that do not significantly overlap, depending on the location of the mobile radio station (1) in the radiation field (25, 30) one of the antennas (15, 20) the corresponding antenna (15, 20) radiated signal from the mobile radio station (1) is received, that depending on the coding of the received signal a message is forwarded to a preferably stationary station (35) and that in the station (35) Location of the mobile radio station (1) is determined depending on the message.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das in der mobilen Funkstation (1) empfangene Signal an die Station (35) weitergeleitet wird. 2. The method according to claim 1, characterized in that the signal received in the mobile radio station (1) is forwarded to the station (35).
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß eine Bewegung der mobilen Funkstation (1) im Strahlungsbereich (5) der Feststation (10) ermittelt wird, wenn innerhalb eines vorgegebenen Zeitraumes unterschiedlich codierte Signale in der mobilen Funkstation (1) empfangen werden.3. The method according to claim 1 or 2, characterized in that a movement of the mobile radio station (1) in the radiation area (5) of the base station (10) is determined if differently coded signals are received in the mobile radio station (1) within a predetermined period become.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Bewegungsrichtung der mobilen Funkstation (1) im Strahlungsbereich (5) der Feststation (10) in Abhängigkeit des zeitlichen Eintreffens der unterschiedlich codierten Signale in der mobilen Funkstation (1) ermittelt wird.4. The method according to claim 3, characterized in that the direction of movement of the mobile radio station (1) in the radiation area (5) of the base station (10) is determined as a function of the arrival of the differently coded signals in the mobile radio station (1).
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß bei Ermittlung einer Bewegungsrichtung der mobilen5. The method according to claim 4, characterized in that when determining a direction of movement of the mobile
Funkstation (1) , die nicht einer vorgegebenen Bewegungsrichtung entspricht, von der Station (35) Alarm ausgelöst wird.Radio station (1), which does not correspond to a predetermined direction of movement, is triggered by the station (35) alarm.
6. Feststation (10) zur Aussendung von Ortsinformationen in einem Strahlungsbereich (5), dadurch gekennzeichnet, daß mindestens zwei Antennen (15, 20) vorgesehen sind, die Funksignale in unterschiedliche Richtungen so abstrahlen, daß der Strahlungsbereich (5) der Feststation (10) in entsprechende nicht nennenswert überlappende6. base station (10) for transmitting location information in a radiation area (5), characterized in that at least two antennas (15, 20) are provided which radiate radio signals in different directions so that the radiation area (5) of the base station (10 ) in corresponding not significantly overlapping
Strahlungsfelder (25, 30) aufgeteilt sind, daß die Antennen (15, 20) mit einem Code-Erzeugungsmittel (40) verbunden sind und daß das Code-Erzeugungsmittel (40) an die Antennen (15, 20) Funksignale mit jeweils unterschiedlicher Codierung abgibt. Radiation fields (25, 30) are divided so that the antennas (15, 20) are connected to a code generating means (40) and that the code generating means (40) emits radio signals to the antennas (15, 20), each with a different coding .
EP97941787A 1996-09-19 1997-08-12 Method to determine location of a mobile radio station and base station for transmission of local information Withdrawn EP0927498A1 (en)

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DE19638337A DE19638337A1 (en) 1996-09-19 1996-09-19 Method for determining the location of a mobile radio station and base station for transmitting location information
DE19638337 1996-09-19
PCT/DE1997/001711 WO1998012884A1 (en) 1996-09-19 1997-08-12 Method to determine location of a mobile radio station and base station for transmission of local information

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