WO2021069467A1 - Abstandsmesssystem - Google Patents
Abstandsmesssystem Download PDFInfo
- Publication number
- WO2021069467A1 WO2021069467A1 PCT/EP2020/078042 EP2020078042W WO2021069467A1 WO 2021069467 A1 WO2021069467 A1 WO 2021069467A1 EP 2020078042 W EP2020078042 W EP 2020078042W WO 2021069467 A1 WO2021069467 A1 WO 2021069467A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transmitting
- receiving unit
- time zone
- time
- receiving
- 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.)
- Ceased
Links
Classifications
-
- 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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/76—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted
- G01S13/765—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein pulse-type signals are transmitted with exchange of information between interrogator and responder
-
- 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
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
- B60R25/248—Electronic key extraction prevention
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
- G06F1/06—Clock generators producing several clock signals
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/2072—Means to switch the anti-theft system on or off with means for preventing jamming or interference of a remote switch control signal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
- B60R25/245—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user where the antenna reception area plays a role
-
- 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
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
- G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
- G07C2009/00793—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
- G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
- G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle
Definitions
- the invention relates to a distance measuring system for measuring a distance of a first transmitting and receiving unit to second transmitting and receiving units, a smartphone that has such a first transmitting and receiving unit, a vehicle that has such second transmitting and receiving units, a method for Measuring a distance of a first transmitting and receiving unit to second transmitting and receiving units, the use of a distance measuring system for an access system of a building, and the use of a distance measuring system for contactless payment or for withdrawing money.
- Smartphones or radio keys can be used to unlock a vehicle, for example a passenger vehicle. These react to, for example, a low-frequency signal from an unlocking circuit of the vehicle, which is sent as soon as the user operates the handle of the vehicle door by measuring the signal strength of the received signal and sending the measured value back to the unlocking circuit.
- the unlocking circuit can estimate the approximate position and thus also the distance of the key from the signal strength. If it is recognized that the distance is in a predefined range, the unlocking circuit unlocks the vehicle.
- the signal strength measurement can be impaired by an attacker using relay transponders, which amplify the signal from the unlocking circuit and forward it to the remote control key, which then reacts and sends the response signal with the signal strength measurements back to the unlocking circuit via the transponder.
- the unlocking circuit receives a signal strength reading from the key indicating that the key is near the vehicle, even though the distance is great, and opens the door of the vehicle.
- a verification of whether the user or the radio key is actually in the vicinity of the vehicle can be carried out by measuring the distance, for example via a Time of flight measurement of a high-frequency signal between
- Communication facilities in the smartphone or radio key and in or on the vehicle can be achieved.
- An important factor here is to minimize the energy required for this in e.g. the smartphone or the distance measuring devices in the vehicle.
- the object of the invention is thus to provide a system with which the energy requirement and thus the costs in the system components involved can be minimized.
- command for example in “distance command”, is to be understood in this disclosure as a digital or an analog signal that is transmitted by wire or wirelessly.
- a digital signal can be, for example, a coded instruction consisting of one or more bits or a voltage originating from a digital circuit that can have two values.
- an analog signal is usually generated e.g. by an analog circuit. In the present case, this can also be a voltage which represents a supply voltage for, for example, a signal strength detection device.
- command is therefore a signal that initiates a measurement and is to be distinguished from a signal that is measured.
- a distance measuring system for measuring a distance of a first transmitting and receiving unit, for example a radio key or a smartphone for verifying a signal strength measurement or for Localization of the smartphone and for unlocking or locking a vehicle, to second transmitting and receiving units, for example distance measuring units on or in the vehicle, provided.
- the distance measuring system has a first transmitting and receiving unit with a first time zone, a second transmitting and receiving unit with a second time zone and a control unit with a control unit time zone.
- a time zone can be understood as a time in the respective component, which is characterized by a clock or a clock module in the device.
- the second transmitting and receiving unit is set up to determine a time zone reference Delta_SE2_SE1 between the second transmitting and receiving unit and the first transmitting and receiving unit, or time zone of the first transmitting and receiving unit, and to send the time zone reference Delta_SE2_SE1 to the control unit.
- the control unit is set up to receive the time zone reference Delta_SE2_SE1 and to determine a time zone reference Delta_ST_SE1 between the control unit time zone and the first transmitting and receiving unit using the time zone reference Delta_SE2_SE1.
- the first transmitting and receiving unit is set up to send a distance measurement command to the second transmitting and receiving unit at a defined point in time or for a defined period of time in the first time zone.
- the defined point in time is a full second or a full minute or a time according to the time zone of the first transmitting and receiving unit, which is either defined by the system or is transmitted at least once to the second transmitting and receiving units.
- This point in time is known to the second transmitting and receiving unit, since the time of the first transmitting and receiving unit is known from the time zone references determined.
- the first transmitting and receiving unit is also set up to send a measurement signal at a further defined point in time
- the second transmitting and receiving unit is further set up to switch from an inactive to an active receiving or measuring state at the defined points in time or the defined period of time switch, thereupon to receive the distance measurement command or the measurement signal, to carry out a distance measurement and to switch back to an inactive measurement state.
- the differences in the clocks or time zones are first determined between the first and the second transmitting and receiving unit, then between the second transmitting and receiving unit and the control unit, whereby all time references are known.
- the differences Delta_SE2_SE1 and Delta_ST_SE1 thus represent clock offsets or time zone offsets, whereby a kind of "synchronization” is achieved, but the clocks are not readjusted or influenced by the "synchronization".
- a distance measurement can be carried out. The distance measurement can take place e.g. at predefined times, e.g. a few seconds after the "synchronization".
- the first transmitting and receiving unit has a first clock that defines the first time zone.
- the second transmitting and receiving unit has a second clock that defines the second time zone.
- the first control unit has a control unit clock which defines the first control unit time zone.
- the first clock, the second clock, and the control unit clock are set up to define the time zones that they each define independently of the other time zones. This means that the clocks in all components can run completely independently of one another and do not have to run the same. It is sufficient to determine and know the time difference between the time zones, which is then added or subtracted accordingly. As the clocks run independently of each other, the differences Delta_SE2_SE1 and Delta_ST_SE1 between the time zones are regularly determined or tracked.
- the first transmitting and receiving unit has a time communication module and a measurement communication module.
- the second transmitting and receiving unit has a time communication module corresponding to the first transmitting and receiving unit and a measurement communication module corresponding to the first transmitting and receiving unit.
- the time communication module of the first transmitting and receiving unit is set up to send a telegram to determine the time zone reference between the first and the second transmitting and receiving unit via a first communication protocol to the second transmitting and receiving unit
- the measurement communication module of the first transmitting and receiving unit is set up to send a measurement signal to determine the distance between the first and the second transmitting and receiving unit via a second communication protocol to the second transmitting and receiving unit.
- the time difference between the time zones can be determined by the time communication module independently of the measurements, which are carried out via a second module, the measurement communication module.
- the time zone difference can be determined by a time communication module over a greater range of the communication link, but is carried out at greater time intervals than the distance measurement, depending on the necessity and the energy requirement for this.
- Both the time communication module and the measurement communication module are activated with regard to the clock offset determination and the distance measurement only in the time in which a corresponding communication actually takes place. During the periods of non-communication, they are switched off or deactivated or switched to stand-by or a sleep state.
- the first communication protocol is a Bluetooth communication protocol
- the second communication protocol is a UWB (Ultra Wide Band) communication protocol.
- a Bluetooth profile can be used in which the sending and receiving time stamps are defined.
- the time zones can be compared over a relatively large distance of, for example, ten or several tens of meters using Bluetooth communication.
- the actual distance measurement is preferably carried out via UWB at a shorter distance, for example up to several meters.
- a special protocol can be used in which the first and second transmitting and receiving units send time stamps back and forth several times in order to obtain an accurate measurement.
- the telegram for determining the time zone reference between the first and the second sending and receiving unit contains a sending time stamp and the second sending and receiving unit is set up to determine the time zone reference using the sending time stamp and a receiving time stamp.
- the same principle is preferably also applied to all time zone references that take place, that is to say also between the second transmitting and receiving unit and the control unit.
- the distance measurement is a transit time measurement and the first and the second transmitting and receiving unit are set up to determine the transit time via a communication between the first and the second transmitting and receiving unit.
- the communication can transmit send and receive time stamps, from the difference between which the transit time can be determined.
- a clock error correction via triangulation, as is common in satellite navigation, for example, is therefore not necessary.
- the distance measuring system also has one or more further second transmitting and receiving units, the further second transmitting and receiving units each having their own, independent time zone and being set up, the time zone reference Delta_SE2_SE1 from the second transmitting and receiving unit or from the To receive control unit and from this to determine its own time zone reference Delta_SE2x_SE1 to the first transmitting and receiving unit. They are also set up to receive a distance measurement signal at or for the defined point in time from the control unit and to switch from an inactive to an active measurement state at this point in time, thereupon to receive the measurement signal from the transmitting and receiving units, to carry out a distance measurement, and then back in to change an inactive measurement state.
- the second transmitting and receiving unit described above can thus be seen as the “master”, which determines the time zone difference to the first transmitting and receiving unit and sends the difference to the other second transmitting and receiving units, so that they do not use the first to determine the time zone difference Sending and receiving units have to communicate.
- the others are second transmitting and receiving units have the same structure as the master transmitting and receiving unit.
- the control unit can thereby flexibly select each of the second transmitting and receiving units as the master.
- control unit is integrated in a second transmitting and receiving unit.
- a smartphone which has a first transmitting and receiving unit as described above.
- a smartphone can have various communication modules, such as cellular radio, Bluetooth, NFC (Near Field Communication), and can, for example, be controlled relatively easily by applications. There is no need to carry another device with you. It is therefore suitable to be used as a first transmitting and receiving unit.
- a vehicle which has a second transmitting and receiving unit and a control unit.
- the vehicle can have several transmitting and receiving units, which are fed by the power supply of the vehicle.
- the transmitting and receiving units and the control unit can be wired or wirelessly connected to one another.
- the antennas for the transmitter and receiver units can, for example, be attached to the vehicle roof or at the corners in order to have the largest possible and undisturbed radiation area.
- a vehicle can be, for example, a passenger car, a bus, a truck or a rail-bound vehicle.
- a method for measuring a distance between a first transmitting and receiving unit and second transmitting and receiving units which has the following steps:
- the time zone differences can also be determined in such a way that, for example, the components in the vehicle, i.e. the second and further second transmitting and receiving units and the control unit, take place first and then the time zone difference is determined between the first and second time zones.
- the distance measuring system can be used, for example, to verify that a user who is carrying a first transmitting and receiving unit is actually in the vicinity of the transmitting and receiving unit.
- a vehicle the following application scenarios are possible, for example:
- the user approaches the vehicle from a long distance in order to unlock the vehicle.
- the vehicle is unlocked after the user proximity has been verified.
- the user gets into the open vehicle or an open vehicle such as a construction machine and starts the vehicle. Starting is, for example, only possible after verification of proximity to the user
- the user leaves the vehicle after a triggered locking.
- the user leaves the vehicle and goes a long way away, so that the vehicle is locked when the proximity to the user can no longer be verified.
- the user approaches the vehicle from a long distance, but remains near the vehicle for a long time without opening the door.
- the verification prevents the vehicle from remaining open because the spatial verification area has been left.
- the distance measuring system is used for an access system of a building. With this use, the building is only unlocked after verification of proximity to the user.
- the distance measuring system is used for contactless payment or for withdrawing money, so that paying or withdrawing money is only possible when the proximity to the user has been verified.
- FIG. 1 shows a block diagram of a distance measuring system according to an embodiment
- FIG. 2 shows a block diagram of a smartphone with a first transmitting and receiving unit
- FIG. 3 shows a block diagram of a vehicle with a control unit and second transmitting and receiving units
- FIG. 4 shows a flow chart of a method for measuring a distance between a first transmitting and receiving unit and second transmitting and receiving units.
- FIG. 1 shows a block diagram of a distance measuring system 100 for measuring a distance from a first transmitting and receiving unit 110 to second transmitting and receiving units 120, 124 with a first transmitting and receiving unit 110 and a clock 112, which defines a first time zone, with a second send and Receiving unit 120 and a clock 122, which defines a second time zone, and with a control unit 130 and a clock 132, which defines a control unit time zone 132.
- a further second transmitting and receiving unit 124 with a clock 126 which defines a further second time zone, is shown.
- the first transmitting and receiving unit 110 has a time communication module 144 and a measurement communication module 154.
- the second transmitting and receiving units have a time communication module 142 and a measurement communication module 152.
- a time communication connection 140 is only established between the first transmission and reception unit 110 and the second transmission and reception unit 120
- a measurement communication connection 150 is established between the first transmission and reception unit 110 and both the second transmission and reception unit 120 and the further second transmitting and receiving unit 124 is set up. Further connections exist between the second transmitting and receiving unit 120, 124 and the control unit 130.
- FIG. 2 shows a smartphone 200 with a first transmitting and receiving unit.
- FIG. 3 shows a block diagram of a vehicle with a control unit 130, a second transmitting and receiving unit 120 and a further second transmitting and receiving unit 124.
- FIG. 4 shows a flow chart of a method for measuring a distance between a first transmitting and receiving unit and second transmitting and receiving units, with the following steps:
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Signal Processing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202080070728.5A CN114450601B (zh) | 2019-10-10 | 2020-10-07 | 距离测量系统 |
| US17/767,417 US12123940B2 (en) | 2019-10-10 | 2020-10-07 | Distance measuring system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019215538.3 | 2019-10-10 | ||
| DE102019215538.3A DE102019215538B4 (de) | 2019-10-10 | 2019-10-10 | Abstandsmesssystem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021069467A1 true WO2021069467A1 (de) | 2021-04-15 |
Family
ID=72840522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2020/078042 Ceased WO2021069467A1 (de) | 2019-10-10 | 2020-10-07 | Abstandsmesssystem |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12123940B2 (de) |
| CN (1) | CN114450601B (de) |
| DE (1) | DE102019215538B4 (de) |
| WO (1) | WO2021069467A1 (de) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140253388A1 (en) * | 2013-03-08 | 2014-09-11 | Qualcomm Incorporated | Synchronization of anchor units in a position location tracking system |
| US20150002271A1 (en) * | 2013-06-27 | 2015-01-01 | Qualcomm Incorporated | Variable listen duration and/or synchronized wake-up of asset tags |
| US20170195109A1 (en) * | 2016-01-06 | 2017-07-06 | Alcatel-Lucent Usa Inc. | Method and apparatus for over-the-air anchor-anchor synchronization |
| DE102017201308A1 (de) * | 2017-01-27 | 2018-08-02 | Continental Automotive Gmbh | Verfahren zum Verifizieren eines vorgegebenen räumlichen Maximalabstands eines Funkschlüssels bezüglich eines Kraftfahrzeugs sowie Steuervorrichtung, Kraftfahrzeug und Funkschlüssel |
| EP3386218A1 (de) * | 2017-04-03 | 2018-10-10 | Nxp B.V. | Bereichsbestimmungsmodul |
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| US6067039A (en) * | 1998-11-30 | 2000-05-23 | Pacific Design Engineering (1996 ( Ltd. | Systems and methods for determining the distance between two locations |
| US6651031B2 (en) * | 2001-12-12 | 2003-11-18 | Nokia Corporation | Method for providing time using a multiple-clock model and a clock system using such a model |
| US7295849B2 (en) | 2003-12-17 | 2007-11-13 | Lear Corporation | Vehicle two way remote communication system |
| US8334801B2 (en) * | 2010-07-26 | 2012-12-18 | Ensco, Inc. | System and method for real-time locating |
| US9232493B2 (en) * | 2013-01-31 | 2016-01-05 | Marvell World Trade Ltd. | Frequency offset compensation for WiFi ranging |
| FR3049065B1 (fr) * | 2016-03-16 | 2018-03-23 | Continental Automotive France | Procede de determination de la position d'un equipement portable d'utilisateur autour d'un vehicule et dispositif de localisation associe |
| US10328898B2 (en) * | 2016-10-12 | 2019-06-25 | Denso International America, Inc. | Passive entry / passive start systems and methods for vehicles |
| EP3335942B1 (de) * | 2016-12-14 | 2019-11-20 | Nxp B.V. | Sicheres ventilzugangssystem für fahrzeug, schlüssel, fahrzeug und verfahren dafür |
| DE102017205198B4 (de) * | 2017-03-27 | 2019-10-17 | Bayerische Motoren Werke Ag | Vorrichtung zur Bestimmung einer Distanz zwischen einem Anker und einem Tag |
| US10334544B2 (en) * | 2017-04-28 | 2019-06-25 | The Boeing Company | Precision relative positioning and free space time transfer between moving platforms |
| DE102017217978A1 (de) | 2017-10-10 | 2019-04-11 | Continental Automotive Gmbh | Zugangssystem und Verfahren zur Zugangsverifizierung |
| US10902691B2 (en) * | 2018-10-12 | 2021-01-26 | Denso International America, Inc. | Passive entry/passive start access systems with bidirectional tone exchange |
| DE102019212669A1 (de) | 2019-08-23 | 2021-02-25 | Continental Automotive Gmbh | Verfahren zur Synchronisation von zumindest zwei Kommunikationsvorrichtungen, Kommunikationsvorrichtung, Fahrzeug und Kommunikationssystem |
| US11624214B2 (en) * | 2020-02-06 | 2023-04-11 | Ford Global Technologies, Llc | Time of flight based security for multiple key fobs |
-
2019
- 2019-10-10 DE DE102019215538.3A patent/DE102019215538B4/de active Active
-
2020
- 2020-10-07 WO PCT/EP2020/078042 patent/WO2021069467A1/de not_active Ceased
- 2020-10-07 CN CN202080070728.5A patent/CN114450601B/zh active Active
- 2020-10-07 US US17/767,417 patent/US12123940B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140253388A1 (en) * | 2013-03-08 | 2014-09-11 | Qualcomm Incorporated | Synchronization of anchor units in a position location tracking system |
| US20150002271A1 (en) * | 2013-06-27 | 2015-01-01 | Qualcomm Incorporated | Variable listen duration and/or synchronized wake-up of asset tags |
| US20170195109A1 (en) * | 2016-01-06 | 2017-07-06 | Alcatel-Lucent Usa Inc. | Method and apparatus for over-the-air anchor-anchor synchronization |
| DE102017201308A1 (de) * | 2017-01-27 | 2018-08-02 | Continental Automotive Gmbh | Verfahren zum Verifizieren eines vorgegebenen räumlichen Maximalabstands eines Funkschlüssels bezüglich eines Kraftfahrzeugs sowie Steuervorrichtung, Kraftfahrzeug und Funkschlüssel |
| EP3386218A1 (de) * | 2017-04-03 | 2018-10-10 | Nxp B.V. | Bereichsbestimmungsmodul |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114450601A (zh) | 2022-05-06 |
| DE102019215538A1 (de) | 2021-04-15 |
| DE102019215538B4 (de) | 2021-06-10 |
| US12123940B2 (en) | 2024-10-22 |
| US20240103153A1 (en) | 2024-03-28 |
| CN114450601B (zh) | 2025-08-01 |
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