WO2003098951A1 - Procede de determination de position d'une station mobile et unite de determination de position - Google Patents

Procede de determination de position d'une station mobile et unite de determination de position Download PDF

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Publication number
WO2003098951A1
WO2003098951A1 PCT/DE2003/001051 DE0301051W WO03098951A1 WO 2003098951 A1 WO2003098951 A1 WO 2003098951A1 DE 0301051 W DE0301051 W DE 0301051W WO 03098951 A1 WO03098951 A1 WO 03098951A1
Authority
WO
WIPO (PCT)
Prior art keywords
station
forwarding
mobile station
signal
msi
Prior art date
Application number
PCT/DE2003/001051
Other languages
German (de)
English (en)
Inventor
Maik Bienas
Thomas Gottschalk
Frank Kowalewski
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
Priority to AU2003232587A priority Critical patent/AU2003232587A1/en
Priority to DE10393057T priority patent/DE10393057D2/de
Publication of WO2003098951A1 publication Critical patent/WO2003098951A1/fr

Links

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 a mobile station and a corresponding position determining unit.
  • position determination functions are provided in the mobile terminals.
  • UMTS Universal Mobile Telecommunications System
  • the UMTS standard provides three modes for transmission over the air interface. These are the FDD (Frequency Division Duplex) mode, the 3.84 Mchip / s TDD (Time Division Duplex) mode and the 1.28 Mchip / s TDD mode.
  • FDD mode the transmission in the uplink (UL) and downlink (DL) direction takes place on different frequencies.
  • Uplink means the direction of transmission from a terminal or a mobile station to a network element, which is also referred to as a base station or NodeB.
  • Downlink is accordingly the direction of transmission from a base station to the mobile station.
  • TDD mode only one carrier frequency is used, and the uplink and downlink directions are separated by assigning time slots.
  • the mobile station receives a signal from a station via a forwarding station and at
  • Position determination of the mobile station the position of the forwarding station is taken into account.
  • Radio systems are, in particular, systems in which GPS is used to determine the position of stations and any mobile radio systems, for example according to the GSM (Global System for Mobile Communications) or UMTS standard.
  • GSM Global System for Mobile Communications
  • UMTS Universal Mobile Telecommunications
  • those forwarding stations for the signal that are in question for forwarding the signal are advantageously determined come.
  • Several positions are calculated for the mobile station, with the position of another forwarding station that is suitable for forwarding being used for each position calculation.
  • the one of the several positions is determined as the actual position of the mobile station for which the position calculations have the smallest error.
  • the positions of all stations and forwarding stations in the radio communication system are known from network planning. On the basis of this information, those forwarding stations can be determined and taken into account in a position determination that are within the transmission range of the transmitting station whose signal has been forwarded. In this way, the computing effort for a position determination can be minimized, provided the sending station is known, the signal of which was forwarded.
  • Positions is set as the actual position of the mobile station for which the position calculation has the least error. If the transmitting station, whose signal has been forwarded, is not known to the mobile station, the position of the mobile station can nevertheless be determined with a high degree of accuracy by taking into account all possible transmission paths of all signals.
  • the mobile station receives a forwarding signal coded with an individual code of the forwarding station in synchronization with the signal of the station.
  • a position determination unit recognizes on the basis of the forwarding signal without further calculations that the signal has been forwarded and which forwarding station must be taken into account when determining a position.
  • the mobile station receives a forwarding signal encoded with a code shared by a number of forwarding stations in synchronism with the station signal. In this way, the mobile station can immediately recognize that the signal has been forwarded. However, the corresponding forwarding station cannot be determined directly on the basis of the forwarding signal. By taking into account all the forwarding stations that are suitable for forwarding the signal (for example, as in the first embodiment of the invention), the position of the mobile station can be determined as accurately as possible.
  • the mobile station can directly determine the transit time of the forwarding signal from the forwarding station to the mobile station. A calculation of this runtime from the total runtime of the signal from the sending station to the mobile station can then be omitted.
  • the code is advantageously a scrambling code or a spreading code.
  • the position determination unit has all the features necessary for carrying out the method according to the invention.
  • Fig. 1 is a schematic representation of a position determination according to the OTDOA and OTDOA-IPDL method
  • FIG. 2 shows a schematic representation of a radio communication system for carrying out a method according to the invention for determining the position of a mobile station.
  • a known method for position determination is position determination according to the OTDOA method, which is based on measurements of signals transmitted over the air interface between several base stations and the mobile station to be located.
  • the mobile station to be located tries to get a known signal from to detect two different, neighboring base stations and to determine the reception times.
  • the times of reception of the known signal from the two different, neighboring base stations are then sent for evaluation to the responsible position calculation function PCF (Position Calculation Function) of the base station which is responsible for the mobile station to be located.
  • evaluating means that the position calculation function calculates the position from the time difference of the reception times or from the running time difference.
  • the time difference establishes a hyperboloid that indicates the potential location of the mobile station. If base stations and mobile stations are on the surface of the earth, the potential location is a hyperbola on the surface of the earth. By including another base station, the location of the mobile station is then at the intersection of the two hyperbolas.
  • Figure 1 shows three base stations BS1, BS2 and BS3 and a mobile station MSI.
  • the hyperbola Hy 3 is determined by the time difference of the signals from the first base station BS1 and the third base station BS3.
  • the hyperbola Hy 23 is determined by the time difference of the signals from the second base station BS2 and the third base station BS3.
  • the mobile station MSI is located at the intersection of the two hyperbolas Hy 3 , Hy 23 . At least one additional piece of information is required for a more precise position determination. So either
  • the OTDOA method achieves an accuracy in the position determination of a mobile station of approximately 80 to 100 m.
  • the OTDOA-IPDL method provides an improvement to the OTDOA method.
  • the OTDOA-IPDL method is an extension in the event that signals from a connection base station via which the mobile station is connected to a radio communication network cover signals from other base stations. This makes it difficult or even impossible to detect signals from the other base stations. This applies in particular to signals on the Common Pilot Channel, which all base stations use and which is usually used to determine the time difference. So that detection of signals from other Ba isstations possible, the transmissions of the connection base station are switched off for short periods of time with the OTDOA-IPDL method.
  • the resulting pauses with regard to the transmission of this connection base station can then be used by the mobile station in order to detect the times of reception of the signals of the other, neighboring base stations.
  • This pause can be several symbols long, typically 5 to 10 symbols.
  • the length of a symbol corresponds, for example, to 256 chips in UMTS-FDD mode and a maximum of 16 chips in TDD mode, with one chip being approximately 0.26 ⁇ s long at a chip frequency of 3.84 Mchip / s.
  • a first base station BS1 sends first signals S1, which are coded with an individual code C1 of the first base station BS1, to the mobile station MSI.
  • a second and a third base station BS2, BS3 send second and third signals S2, S3 to the mobile station MSI.
  • the second and third signals S2, S3 are also coded with an individual code C2, C3 of the respective base station BS2, BS3.
  • the individual codes Cl, C2, C3 the The base stations BS1, BS2, BS3 can be the mobile station MSI
  • the third signals S3 cannot be sent directly to the mobile station MSI.
  • the direct path of propagation is blocked by an obstacle H.
  • the third signals S3 are therefore forwarded to the mobile station MSI via the third forwarding station R3.
  • the running time of the first signals S1 is tl
  • the running time of the second signals S2 is t2
  • the total running time of the third signals S3 is made up of the sum of the running time t3 from the third base station to the third forwarding station R3 and the running time tR3 from the third forwarding station R3 Mobile station MSI together.
  • the position determination unit PE located in the mobile station MSI now calculates the position of the mobile station MSI, the position determination is incorrect if the position of the third base station BS3 is used together with the total running time t3 + tR3 + ⁇ 3, since this total running time is longer than that actual transit time for a direct transmission from the third base station BS3 to the mobile station MSI.
  • the third forwarding station R3 transmits the forwarded third signals S3 in synchronism with a forwarding signal SR3, which is encoded with an individual code CR3 of the third forwarding station R3.
  • the forwarding station R3 sends the forwarded third signal S3 and the forwarding signal SR3 such that the Quotient of the two transmission powers corresponds to a predefined value.
  • the forwarding signal SR3 can
  • the mobile station MSI receives the second and third signals S2, S3 and the forwarding signal SR3 and, when checking the received signals, determines that it has received the signals synchronously.
  • the mobile station MSI therefore determines a quotient for the two signals S2, S3 from the received power of the respective signal S2, S3 and the received power of the forwarding signal SR3 and compares the calculated values with the predefined value.
  • the quotient only coincides with the predefined value when the receiving power of the third signals S3 is used, so that the mobile station clearly determines that the third signals have been forwarded.
  • the formation of the quotient can of course be omitted if only one signal and one forwarding signal are received synchronously.
  • the mobile station MSI calculates the transit time tR3 of the forwarded third signals S3 either on the basis of the time stamp Z3, which indicates the time of transmission of the forwarding signal SR3 and thus also the time of transmission of the third signals S3, or subtracts the known duration from the total duration t3 + tR3 + ⁇ 3 t3 between the third base station BS3 and the third relay station R3 and the likewise known internal signal delay time ⁇ 3 of the third relay station R3.
  • the transit times tl, t2 of the first and second signals S1, S2 or the total transit time t3 + tR3 + ⁇ 3 of the third signals S3 are not known to the mobile station MSI, they can of course also use the respective reception times of the signals S1, S2, S3 Use position determination.
  • the time of reception of the third signals S3 is then reduced by the Known delay time t3 between the third base station BS3 and the third relay station R3 and the also known internal signal delay time ⁇ 3 of the third relay station R3 corrected, ie these delay times t3, ⁇ 3 are subtracted from the time of reception of the third signals S3
  • the third forwarding station R3 does not provide the forwarding signal SR3 with an individual code CR3 of the third forwarding station R3 but with a forwarding station code CR used in the same way by a plurality of forwarding stations R1, R2, R3.
  • the mobile station MSI recognizes that it has received the third signals S3 received synchronously with the forwarding signal SR3 from a forwarding station R1, R2, R3, but cannot use the forwarding signal SR3 to determine from which forwarding station R1, R2, R3 forwarded the third signals S3 were.
  • the mobile station MSI From the forwarding stations R1, R2, R3 known to the mobile station MSI, which are within its range, it determines those forwarding stations R2, R3 via which the third signals S3 may have been forwarded and in each case carries out a position determination taking into account the corresponding forwarding stations R2, R3 through.
  • the mobile station MSI calculates positions for two scenarios: a forwarding of the third signals S3 via the second forwarding station R2 and forwarding of the third signals S3 via the third forwarding station R3. Of the positions calculated in this way, the one that has the smallest error is determined as the current position.
  • An additional increase in the accuracy of the position determination can be achieved by an RTT measurement, for example for the first base station BS1.
  • the invention can also be carried out when the position determination unit PE is not in the mobile station MSI but in the radio communication system, for example in the RNCl network. All positions of the stations are known to the radio communication system, so that the mobile station MSI only has to send the determined transit times or reception times of the three signals S1, S2, S3, the forwarding signal SR3 and, if appropriate, the calculated quotient of the reception powers to the network RNCl. All of the calculations described above are then carried out in the same way in the position determination unit located in the RNCl network.

Abstract

Dans un procédé de détermination de position d'une station mobile (MS1), la station mobile (MS1) reçoit un signal (S3) d'une station (BS3) par l'intermédiaire d'une station de retransmission (R3) et, lors de la détermination de la position de la station mobile (MS1), la position de la station de retransmission (R3) est prise en compte.
PCT/DE2003/001051 2002-05-15 2003-03-31 Procede de determination de position d'une station mobile et unite de determination de position WO2003098951A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003232587A AU2003232587A1 (en) 2002-05-15 2003-03-31 Method for determining the position of a mobile station, and position determination unit
DE10393057T DE10393057D2 (de) 2002-05-15 2003-03-31 Verfahren zur Positionsbestimmung einer mobilen Station und Positionsbestimmungseinheit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10221649.5 2002-05-15
DE2002121649 DE10221649A1 (de) 2002-05-15 2002-05-15 Verfahren und Vorrichtung zur Positionsbestimmung

Publications (1)

Publication Number Publication Date
WO2003098951A1 true WO2003098951A1 (fr) 2003-11-27

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DE (2) DE10221649A1 (fr)
WO (1) WO2003098951A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005029897A1 (fr) * 2003-09-19 2005-03-31 Bell Mobility Inc. Systeme de localisation de la position d'un utilisateur de portable
RU2681955C1 (ru) * 2018-07-16 2019-03-14 Общество с ограниченной ответственностью "НРТБ-Система" (ООО "НРТБ-С") Способ определения координат движущегося объекта
RU2682317C1 (ru) * 2018-07-16 2019-03-19 Общество с ограниченной ответственностью "НРТБ-Система" (ООО "НРТБ-С") Способ определения координат движущегося объекта
RU2695805C1 (ru) * 2019-01-23 2019-07-29 Акционерное общество "Национальное РадиоТехническое Бюро" (АО "НРТБ") Способ определения координат движущегося объекта по дальностям
RU2695807C1 (ru) * 2019-01-23 2019-07-29 Акционерное общество "Национальное Радио Техническое Бюро" (АО "НРТБ") Способ определения координат движущегося объекта по дальностям

Citations (4)

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Publication number Priority date Publication date Assignee Title
US5945949A (en) * 1997-01-13 1999-08-31 Lucent Technologies Inc. Mobile station position determination in a wireless communication system
WO2000069199A1 (fr) * 1999-05-05 2000-11-16 Nokia Corporation Procede de positionnement d'une station mobile
US20020052208A1 (en) * 2000-09-23 2002-05-02 Koninklijke Philips Electronics N.V. Mobile radio terminal and related method and system
WO2002059638A2 (fr) * 2000-11-16 2002-08-01 Qualcomm Incorporated Determination de positions dans un systeme de telecommunications sans fil par detection, et compensation des repeteurs

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US5945949A (en) * 1997-01-13 1999-08-31 Lucent Technologies Inc. Mobile station position determination in a wireless communication system
WO2000069199A1 (fr) * 1999-05-05 2000-11-16 Nokia Corporation Procede de positionnement d'une station mobile
US20020052208A1 (en) * 2000-09-23 2002-05-02 Koninklijke Philips Electronics N.V. Mobile radio terminal and related method and system
WO2002059638A2 (fr) * 2000-11-16 2002-08-01 Qualcomm Incorporated Determination de positions dans un systeme de telecommunications sans fil par detection, et compensation des repeteurs

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005029897A1 (fr) * 2003-09-19 2005-03-31 Bell Mobility Inc. Systeme de localisation de la position d'un utilisateur de portable
US7177653B2 (en) 2003-09-19 2007-02-13 Bell Mobility Inc. Mobile user position locating system
RU2681955C1 (ru) * 2018-07-16 2019-03-14 Общество с ограниченной ответственностью "НРТБ-Система" (ООО "НРТБ-С") Способ определения координат движущегося объекта
RU2682317C1 (ru) * 2018-07-16 2019-03-19 Общество с ограниченной ответственностью "НРТБ-Система" (ООО "НРТБ-С") Способ определения координат движущегося объекта
RU2695805C1 (ru) * 2019-01-23 2019-07-29 Акционерное общество "Национальное РадиоТехническое Бюро" (АО "НРТБ") Способ определения координат движущегося объекта по дальностям
RU2695807C1 (ru) * 2019-01-23 2019-07-29 Акционерное общество "Национальное Радио Техническое Бюро" (АО "НРТБ") Способ определения координат движущегося объекта по дальностям

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Publication number Publication date
DE10221649A1 (de) 2003-11-27
DE10393057D2 (de) 2005-04-21
AU2003232587A1 (en) 2003-12-02

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