WO2003005749A1 - Procede et dispositif de determination de la position d'au moins un appareil abonne d'un systeme de communication radio - Google Patents

Procede et dispositif de determination de la position d'au moins un appareil abonne d'un systeme de communication radio Download PDF

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Publication number
WO2003005749A1
WO2003005749A1 PCT/DE2002/002424 DE0202424W WO03005749A1 WO 2003005749 A1 WO2003005749 A1 WO 2003005749A1 DE 0202424 W DE0202424 W DE 0202424W WO 03005749 A1 WO03005749 A1 WO 03005749A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
msi
base stations
radio
subscriber device
Prior art date
Application number
PCT/DE2002/002424
Other languages
German (de)
English (en)
Inventor
Andreas Otte
Mark Beckmann
Michael Eckert
Martin Hans
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2003005749A1 publication Critical patent/WO2003005749A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/10—Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements, e.g. omega or decca systems

Definitions

  • the invention relates to a method for determining the position of at least one subscriber device in its current location radio cell of a radio communication system which has a multiplicity of base stations with associated radio cells, with at least two base stations which are adjacent to the reference base station in the location radio cell of the subscriber device to be located, as well as the reference base station of the location radio cell, location measurement signals are transmitted at predefinable transmission times, and the time differences between the location measurement signals of the neighboring base stations involved and the respectively associated location measurement signal of the reference base station are measured and used for position determination by the subscriber device to be located.
  • the invention has for its object to show a way how the location of a subscriber device of a radio communication system can be determined as accurately as possible in a simple manner.
  • This object is achieved in a method of the type mentioned at the outset in that at least one information signal about the accuracy of the time differences between the transmission times of the location measurement signals of the neighboring base stations involved and the respectively associated location measurement signal of the reference base station is sent to the subscriber device by at least one network unit ,
  • the invention also relates to a device for carrying out the method according to the invention.
  • the invention relates to a network component of a radio communication system for performing the method according to the invention.
  • FIG. 1 shows a schematic representation of the radio cells of a radio communication system spanned by a plurality of base stations, the location of a mobile radio device to be determined in its current location radio cell,
  • FIGS. 2 and 4 each show a schematic representation of the transmission of at least one information signal between at least one network component of the radio communication system according to FIG. 1 and at least one subscriber device to be located, the subscriber device and / or the network component using this information signal in each case showing the accuracy of the Information on the time difference between the transmission times of the location measurement signals between the reference base station of the location radio cell of the subscriber device to be located and at least two neighboring base stations is communicated
  • Figure 5 shows a schematic representation of the current
  • Residence radio cell of a subscriber device to be located which is spanned by a base station, and its coupling to at least one network component of the radio communication system, and
  • FIG. 6 shows a schematic representation of a further variant of the method according to the invention for determining the position of a subscriber device of a radio communication system.
  • UMTS Universal Mobile Telecommunication Standard
  • OTDOA Observed Time Difference of Arrival
  • GPS Global Positioning System
  • UE assisted mode the position calculation takes place in the network.
  • the mobile station to be located in each case (, called UMTS UE or user equipment,) carries out measurements for this purpose and sends them to the network, where the position is calculated.
  • UE based mode the position calculation takes place in the respective mobile station to be located.
  • the mobile radio station carries out both the measurements and the actual position calculation and transmits then only the calculated position back to the network.
  • the principle of the OTDOA method is based on the difference measurement of transit times of location measurement signal transmissions of two different base stations. From this, a local hyperbola between the two base stations can be determined, on the local points of which the mobile radio device sought can be located. If such difference measurements between 3 base stations are carried out in relation to a reference base station, the position can be in all 3 coordinates, i.e. three-dimensional, clearly determine.
  • the base stations which do not form the reference base station are called neighboring base stations in the following. These are the base stations that are adjacent to the reference base station in the location radio cell of the subscriber device to be located.
  • Figure 1 shows the principle in a 2-dimensional plane. It can also be seen that time difference measurements from only 2 neighboring base stations, e.g. BS2 and BS4 to the reference base station BS1 yield two intersection points SP1 and SP2, and the position of the mobile radio station MSI only results in a clear intersection point SP2 through the time difference measurement between the reference base station BS1 and the further, third neighboring base station BS3, which in clearly shows the location of the mobile device sought.
  • 2 neighboring base stations e.g. BS2 and BS4 to the reference base station BS1 yield two intersection points SP1 and SP2
  • the position of the mobile radio station MSI only results in a clear intersection point SP2 through the time difference measurement between the reference base station BS1 and the further, third neighboring base station BS3, which in clearly shows the location of the mobile device sought.
  • the time difference between the transmission times between the respective location measurement signal of the respectively neighboring neighboring base station and the location measurement signal of the reference base station is advantageously made known to the mobile radio station, since the UMTS network is not synchronized, i.e. the base stations start the position measurement signal transmissions to the mobile radio station at different times.
  • Additional information can expediently be sent to the mobile radio stations located in a specific radio cell in three different ways.
  • the additional information is distributed together with the system information to all mobile radio stations within a radio cell. This is commonly referred to as broadcast.
  • the additional information together with the request to determine the position is only sent to a specific, i.e. specific mobile station sent.
  • a mobile radio network according to the UMTS standard has at least one radio network control unit, called UMTS RNC (Radio Network Controller), (see FIG. 5), which is connected via a landline connection FN1 to at least one base station, such as BS1, in UMTS, called NodeB is.
  • the respective NodeB such as BS1 spans an assigned radio cell such as ZI in which mobile radio stations are located.
  • FIG. 2 shows the message transfer for case 1 above if the additional information SI is sent to all mobile radio stations in the system information.
  • the message system information SI can be read by all mobile radio stations within a radio cell.
  • FIG. 3 shows the message transfer for case 2 above if the additional information is to be sent to a specific, specific mobile radio station.
  • the radio network controller RNC sends a MEASUREMENT CONTROL message MC to this mobile radio station.
  • the MEASUREMENT CONTROL message MC contains both the additional information and the request to determine the position.
  • the calculated position (in the case of UE based mode) or the measurement results (in the case of UE assisted mode) are then sent to the network component RNC with the MEASUREMENT REPORT message MR.
  • FIG. 4 shows the message transfer for case 3 above, if only the additional information in an ASSISTANCE DATA DELIVERY ADD message is sent from the network control unit RNC to a specific mobile radio station.
  • the messages contain additional information about the reference base station and a list of information about the neighboring base stations.
  • the additional information for the reference base station consists at least of:
  • the additional information for the neighboring base stations consists at least of: - Zeil identity
  • the RTT (Round Trip Time) measurement carried out by the network can also be communicated to the mobile station for the reference base station and for the neighboring base stations.
  • the RTT measurement can be used to determine the distance between a base station and the mobile radio station, which thus results in a circle around the base station on which the mobile radio station is located. This information can be used to increase the accuracy of a position determination. If the RTT information is also provided, time difference measurements between the reference base station and only at least 2 neighboring base stations are required.
  • information about the drift of the time difference between the transmissions from the neighboring base station involved to the reference base station can optionally be communicated. This is advantageous if the transmission times of the base stations drift against each other. With the help of the information about the drift, the period of time until the mobile station is informed of a new time difference between two base stations can be extended.
  • the cell positions indicate the position of the base station. It is also possible to specify the inaccuracy of the position information.
  • the essence of the invention is the signaling of the accuracy of the respective location measurement signal time difference between the reference base station and the neighboring base stations, and, if appropriate, the RTT information from the network to one or more mobile radio stations. This has the advantage that the respective mobile radio station can use this information to better estimate the accuracy of its calculated position.
  • the radio network advantageously also communicates to the mobile station to be located in each case the accuracy of the information about the drift between the location measurement signal transmission times from the neighboring and reference base station.
  • This has the advantage that the mobile radio station can use this information to estimate when it has to request new additional information, in particular information about the time difference between transmissions from neighboring and reference base stations, in order to ensure a certain accuracy of the time difference.
  • the accuracy information can expediently be sent in particular together with the above-mentioned additional information for the reference and neighboring base stations in the system information SI to all mobile radio stations in a cell, or in the RRC messages MEASUREMENT CONTROL MC or ASSISTANCE DATA DELIVERY ADD.
  • a mobile radio station MSI For a first exemplary embodiment, it is assumed that the position of a mobile radio station MSI is to be determined (see FIGS. 1 and 6), which is located in a cell ZI, which is spanned by the reference base station BS1.
  • the mobile radio station MSI is to be connected to the base station BS1 via a radio link or air interface FVl.
  • the base station BS1 is in turn connected to the radio network control unit RNCl (Radio Network Controller) via a fixed network connection FN1. This constellation is shown in Figure 5.
  • RNCl Radio Network Controller
  • the mobile radio station MSI should expediently have the ability to calculate its position itself and to support the OTDOA method, that is to say the ability to determine its position using the “UE based OTDOA * position determination method.
  • the additional information together with the request to determine the position are sent in the MEASUREMENT CONTROL message MR to the mobile radio station MSI.
  • the additional information can also be sent to the mobile radio station in the RRC message ASSISTANCE DATA DELIVERY or together with the system information SI.
  • the network therefore sends a MEASUREMENT CONTROL message MR to the mobile radio station MSI, the additional information about the reference base station and two neighboring base stations, e.g. Contains BS2, BS4.
  • the additional information preferably consists of the following information:
  • the RTT information can expediently also be supplied for the reference base station BS1.
  • the position is determined by calculating the intersection point SP2 as shown in FIG. 6.
  • the mobile radio station uses the time difference information for the location measurement signal transmissions between the reference base station BS1 and the neighboring base stations BS2 and BS3, as well as the time difference measurements between the received location measurement signal transmissions from BS1 and BS2 or between the received transmissions from BSl and BS3. Knowing the position of the base stations results in the spatial hyperbola intersections SP1 and SP2.
  • the mobile radio station MSI can additionally determine the distance to the reference base station BSl and thus determine the intersection SP2 as its position.
  • the message MEASUREMENT CONTROL MR (or also ASSISTANCE DATA DELIVERY or the system information SI) can expediently also contain the following information:
  • the neighboring base station is a base station
  • the mobile radio station can measure the time differences between the received transmissions of BS1 and BS2, or BSl and BS3, with an accuracy of approximately +/- 50 nanoseconds. That corresponds to about +/- 15 meters.
  • the time difference between transmissions from the reference and respective neighboring base station can be specified in steps of 1/16 chips (chip is a constant time base of the time length of 260.42 nanoseconds within the UMTS system).
  • the accuracy of the time difference can therefore be specified to a maximum of 16.28 nanoseconds, which corresponds to approximately 4.9 meters.
  • the standard deviation of the time difference between transmission from the neighboring and reference base station should also be able to be specified in steps of 1/16 chip, that is to say approximately 16.28 nanoseconds.
  • the standard deviation is 1/8 chip, 32.5 nanoseconds, which means an additional inaccuracy of approximately +/- 10 meters in 68% of the cases.
  • the possible RTT measurement can also be communicated to the mobile radio station according to the prior art in steps of 1/16 chip.
  • the standard deviation of the RTT information should also be able to be specified in steps of 1/16 chip and should also be 1/8 chip.
  • the mobile station to be located thus knows the inaccuracy of its own measurement. With the help of knowledge about the inaccuracy of the time difference between the location measurement signal transmissions from reference and respective neighboring base stations, and possibly with additional RTT information that is communicated to the mobile radio station, the mobile radio station can now estimate the inaccuracy of its calculated position and this Share network.
  • MEASUREMENT CONTROL message should / wants to determine its position several times. This message expediently also communicates the drift of the time difference between the reference and neighboring base station to the mobile radio station.
  • the drift can be specified in meters from 0.33 to 15 or -15 to -0.33 meters per second.
  • the drift should be assumed to be +2.5 meters / second. This indicates that the time difference between the transmissions from the reference and neighboring base station changes within 1 second in such a way that the time difference increases by a value that corresponds to 2.5 meters, ie approximately 8.3 nanoseconds. With the help of this information, the mobile radio station can therefore continuously calculate the new time difference.
  • the accuracy of the drift information for each neighboring base station can expediently also have been communicated to the mobile radio station.
  • the accuracy of the drift can be specified in steps of 1 nanosecond (corresponds to approximately 0.3 meters) and that a standard deviation of 0.6 meters / second was signaled for both neighboring base stations.
  • the mobile radio station can now use this additional information to estimate when the time difference is no longer accurate enough. If, for example, the mobile radio station requires an accuracy of the time difference of approx. 50 ns, the mobile radio station can accept an additional inaccuracy per second of approx. 1 nanosecond and thus decide to request new additional information after 50 seconds at the latest.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention vise à déterminer la position d'un appareil abonné (MS1) d'un système radio mobile. A cet effet, l'appareil abonné (MS1) se voit également transmettre au moins un signal d'informations supplémentaire (IS) contenant la précision de l'indication de la différence de temps entre la station de base de référence (BS1) de la cellule radio hôte momentanée (Z1) d'un appareil abonné (MS1) devant être localisé, et au moins une station de base adjacente (BS4).
PCT/DE2002/002424 2001-07-06 2002-07-03 Procede et dispositif de determination de la position d'au moins un appareil abonne d'un systeme de communication radio WO2003005749A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10132824.9 2001-07-06
DE2001132824 DE10132824A1 (de) 2001-07-06 2001-07-06 Verfahren sowie Vorrichtung zur Positionsbestimmung mindestens eines Teilnehmergeräts eines Funkkommunikationssystems

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Publication Number Publication Date
WO2003005749A1 true WO2003005749A1 (fr) 2003-01-16

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PCT/DE2002/002424 WO2003005749A1 (fr) 2001-07-06 2002-07-03 Procede et dispositif de determination de la position d'au moins un appareil abonne d'un systeme de communication radio

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DE (1) DE10132824A1 (fr)
WO (1) WO2003005749A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997023785A1 (fr) * 1995-12-22 1997-07-03 University Of Technology, Sydney Systeme de localisation et de poursuite
WO1998052376A1 (fr) * 1997-05-09 1998-11-19 Nokia Telecommunications Oy Procede de determination de dephasages entre des emetteurs radio et reseau radio utilisant ce procede
WO2000035228A1 (fr) * 1998-12-10 2000-06-15 Nokia Networks Oy Procede et systeme de transmission d'une information de position
US6108558A (en) * 1998-04-21 2000-08-22 Motorola, Inc. Method for calculating a location of a remote Unit utilizing observed time difference (OTD) and real time difference (RTD) measurements.
US6230018B1 (en) * 1998-05-14 2001-05-08 Nortel Networks Limited Devices and processing in a mobile radio communication network having calibration terminals

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997023785A1 (fr) * 1995-12-22 1997-07-03 University Of Technology, Sydney Systeme de localisation et de poursuite
WO1998052376A1 (fr) * 1997-05-09 1998-11-19 Nokia Telecommunications Oy Procede de determination de dephasages entre des emetteurs radio et reseau radio utilisant ce procede
US6108558A (en) * 1998-04-21 2000-08-22 Motorola, Inc. Method for calculating a location of a remote Unit utilizing observed time difference (OTD) and real time difference (RTD) measurements.
US6230018B1 (en) * 1998-05-14 2001-05-08 Nortel Networks Limited Devices and processing in a mobile radio communication network having calibration terminals
WO2000035228A1 (fr) * 1998-12-10 2000-06-15 Nokia Networks Oy Procede et systeme de transmission d'une information de position

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DE10132824A1 (de) 2003-01-23

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