US20150312655A1 - System and Method for Obtaining Vehicle Telematics Data - Google Patents
System and Method for Obtaining Vehicle Telematics Data Download PDFInfo
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- US20150312655A1 US20150312655A1 US14/529,812 US201414529812A US2015312655A1 US 20150312655 A1 US20150312655 A1 US 20150312655A1 US 201414529812 A US201414529812 A US 201414529812A US 2015312655 A1 US2015312655 A1 US 2015312655A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
- G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
- G01C21/16—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
- G01C21/166—Mechanical, construction or arrangement details of inertial navigation systems
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- 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
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/008—Registering or indicating the working of vehicles communicating information to a remotely located station
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- 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
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0841—Registering performance data
- G07C5/085—Registering performance data using electronic data carriers
- G07C5/0858—Registering performance data using electronic data carriers wherein the data carrier is removable
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/08—Insurance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/10—Arrangements in telecontrol or telemetry systems using a centralized architecture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/20—Arrangements in telecontrol or telemetry systems using a distributed architecture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/50—Arrangements in telecontrol or telemetry systems using a mobile data collecting device, e.g. walk by or drive by
Definitions
- the present application relates to a system and method for obtaining vehicle telematics data.
- Current deployments use one of the following embedded-hardware-based methods:
- the present invention discloses a method and system architecture to combine the best features of a smartphone-based approach together with a lightweight embedded tag hardware.
- the smartphone and tag communicate with each other over low-power wireless while in the vehicle and work in concert to: (1) achieve the high degree of accuracy of an expensive pure hardware solution, (2) provide the features listed above that are difficult or impossible to achieve with a pure smartphone solution, (3) realize a substantially lower cost only modestly higher than that of the pure smartphone solution, (4) avoid the high logistics, hardware and deployment cost inherent in a full GSM/GPS Black box or OBD II solution, while maintaining a high level of data accuracy (5) achieve energy-efficient operation, with the tag capable of operating for several years on a small coin-sized battery, (6) improve smartphone battery life by offloading some sensing functions to the tag, and (7) avoid interference with the vehicle wiring or OBD port.
- a sensor tag for obtaining vehicle telematics data includes:
- Communication between the tag and mobile communications device preferably occurs automatically without manual intervention or configuration
- the tag is not connected to the vehicle's computer or power systems.
- the short range wireless communications protocol may be Bluetooth.
- the mobile communications device may be a mobile telephone.
- the communication module also transmits time data associated with the acceleration data to the mobile communications device.
- the communication module may further transmit a tag identity and a user identity to the mobile communications device.
- the tag may include a tamper detection mechanism.
- the tag includes a crash/impact detection mechanism.
- the tag may include sensors other than accelerometer, such as gyroscope, barometer, compass, and position sensors.
- accelerometer such as gyroscope, barometer, compass, and position sensors.
- the tag signs and may optionally encrypt any data sent to the mobile communications device in a manner that the mobile communications device cannot tamper with the data undetected; with encryption, the data is kept confidential from the mobile communications device.
- the mobile communications device forwards the data to the server.
- the server signs and may optionally encrypt any data sent to the mobile device in a manner that the mobile device cannot tamper with the data undetected; with encryption, the data is kept confidential from the mobile device.
- the mobile device forwards the data to the tag.
- data includes parameters, configuration information, and code (for over-the-air firmware upgrade).
- a mobile communications device including:
- the location module may be a GPS module.
- the communications module is able to communication with the tag via a short range wireless communications protocol such as Bluetooth.
- the communication module also receives time data associated with the acceleration data from the tag.
- the communication module may further receive a tag identity and a user identity from the tag.
- the tag may include a tamper detection mechanism.
- FIG. 1 is an example system for implementing a vehicle telematics methodology
- FIG. 2 is a block diagram illustrating an example tag to be installed on a vehicle in more detail
- FIG. 3 is a block diagram illustrating an example mobile communications device in more detail
- FIGS. 4-8 are block diagrams illustrating an example vehicle telematics monitoring method.
- FIG. 9 shows an example server from FIG. 1 in more detail.
- the system and methodology described herein relate to obtaining vehicle telematics data.
- an untethered, battery-powered sensor tag 10 is affixed to a motor vehicle 12 . It is envisioned that the tag 10 will be placed on the windscreen or some other rigid part of the vehicle 12 .
- the tag 10 contains a processor in the form of a microcontroller 22 capable of executing programmed instructions (“firmware”), which controls the operation of the various other components of the tag.
- the components include a low-power wireless communication module 32 to communicate with a mobile communications device 14 in the vehicle.
- the mobile communications device 14 could be any suitable mobile communications device such as a mobile telephone, a tablet, an iPod or any other suitable communications device.
- the components include one or more sensors, specifically a three-axis accelerometer 24 , and optionally one or more among a three-axis gyroscope 26 , a light sensor, a pressure sensor, and a magnetometer.
- the accelerometer 24 measures the acceleration of the tag 10 and thereby of the vehicle 12 when the vehicle is moving and reports the data to the microcontroller 22 .
- the accelerometer and other sensors provide digital output generally via a serial interface standard.
- all the components in the tag are low-power devices, so that one or two small coin-cell batteries suffice for the tag to run for several thousands of hours of driving time (multiple years of operation).
- the firmware of the microcontroller 22 on the tag 10 records telematics data mostly only when the vehicle is moving. When the vehicle is not moving, the components of the tag 10 are in powered-down or in an ultra-low-power idle state. An “acceleration state machine” controls the different states of the tag 10 .
- the short range wireless communications protocol is Bluetooth, but any low-power communication could be used.
- Bluetooth Low Energy (BLE) meets the desired power requirements and is widely available on commodity smartphone devices.
- the microcontroller 22 and Bluetooth communications module 32 including antenna and crystal are combined in a single chip.
- the tag 10 records acceleration and other sensor data. It streams that data to the mobile device 14 over the short-range wireless communication link, which will in turn process that data and transmit at least a portion of the received and processed data via a wireless communications network 16 such as 802.11 (WiFi) or cellular network to a server 18 with an associated database 20 .
- a wireless communications network 16 such as 802.11 (WiFi) or cellular network to a server 18 with an associated database 20 .
- the tag 10 includes a memory 28 in the form of a flash storage, for example using a serial flash memory.
- the memory 28 stores data about trip start/end times, acceleration and other sensor data including telematic events detected by the firmware such as hard braking, accelerations, and turns, unexpected movements of the tag, collisions or crashes, and debugging logs together with time stamps.
- the tag 10 also includes random access memory (RAM) used by the firmware and read-only memory (ROM) used to store configuration data and executable instructions.
- RAM random access memory
- ROM read-only memory
- the tag 10 includes a battery 30 for providing power to the device.
- the battery may be in a coin cell form factor, standard AAA or AA, or solar. It is important to note that in the preferred embodiment the tag is not tethered to any wired source of power, such as the vehicle's electrical power supply or the vehicle's standard on-board diagnostic (OBD) port. Because it does not have an unbounded source of energy, its operation includes methods to use energy frugally and carefully, as described below.
- OBD on-board diagnostic
- the tag 10 includes hardware and firmware instructions on the microcontroller 22 that measure and report the power level of the battery to the mobile device over the low-power wireless communication link.
- the hardware may be implemented with an intermediary circuit (not shown) connected between the battery and the microcontroller 22 to measure the voltage of the battery.
- the user is given a warning on the mobile device in order to warn users when the battery is going low.
- the short range wireless communications protocol is Bluetooth, but any low-power communication could be used.
- Bluetooth Low Energy (BLE) meets the desired power requirements and is widely available on commodity smartphone devices.
- the microcontroller 22 and Bluetooth communications module 32 including antenna and crystal are combined in a single chip.
- the mobile communications device (smartphone) 14 includes a display 36 by which information is displayed to a user of the device 14 .
- a user interface 38 receives inputs from the user.
- the user interface 38 could be a keypad or a touch screen, for example.
- the device 14 includes a processor 40 connected to the other illustrated modules to control the operation of the device 14 .
- the device also includes a location module 42 .
- the location module 42 is used to determine the location of the mobile communications device 14 and thereby the position of the vehicle in which the mobile communications device 14 is located.
- the location module 42 includes one or more position sensors such as the Global Positioning System (GPS) as well as WiFi-based location or cellular location sensors are used for an application on the mobile device to obtain position and velocity information. Other sensors such as a gyroscope and acceleration sensors on the mobile device may also be used to gather information during a trip.
- GPS Global Positioning System
- WiFi-based location or cellular location sensors are used for an application on the mobile device to obtain position and velocity information.
- Other sensors such as a gyroscope and acceleration sensors on the mobile device may also be used to gather information during a trip.
- the device includes an on-board memory 46 as well as a communications module 44 , which allows the device to communicate both with the tag 10 and using one or more the mobile communication networks 16 .
- the device 14 will include an executable application that is able to execute on the device.
- the tag 10 is installed into a motor vehicle 12 .
- this could be accomplished in any one of a number of ways including affixing the tag to the windscreen or to any other rigid part of the motor vehicle as illustrated in FIG. 1 , for example.
- the user (who may or may not be the vehicle's owner or driver) will be able to open the executable application on the mobile communications device 14 and start the initialization phase, which will search for a tag 10 in the vicinity.
- a list of tags 10 in the vicinity will be displayed to the user via the display 36 and the user will then be able to select the correct tag 10 via the user interface 38 .
- the user will then be able to select a vehicle 12 to be linked to the selected tag 10 .
- a list of the vehicles may be provided via the display 36 .
- the selected vehicle 12 and the identity of the tag 10 secured to the vehicle 12 are submitted to the server 18 together with a user ID, typically via the communications module 44 and the mobile communications network 16 .
- a noteworthy aspect of the system is that there is no Bluetooth pairing step between the phone and the tag required.
- the administrator can specify via a server-side configuration which set of tags any given smartphone application instance will be able to connect to and transfer data bi-directionally between the server and tag. It is possible for this set to be “all tags”, which means that the app instance can connect to any active tag. However, the set of tags whose data is made visible on the app may be restricted only to those tags that are linked to the user on the server.
- Vehicle V 1 belongs to a first user, who also owns smartphone app A 1 , is linked to Tag T 1 . Then, if smartphone app A 2 belonging to a different user travels in Vehicle V 1 , depending on the server-side configuration, tag T 1 and app A 2 may connect with each other and exchange data. But even if that happens, the data belonging to this trip will be made visible on app A 1 belonging to the first user and the data used to assess the driving usage of vehicle V 1 , and not a different vehicle belonging to the second user.
- the tag 10 When the user begins driving the vehicle 12 , the tag 10 will advertise itself on the short range wireless communications network, such as Bluetooth. Any mobile device running the corresponding mobile application may see the advertisement, and potentially any mobile devices with the application depending on the policy deployed (application) will be able to connect to the tag.
- the short range wireless communications network such as Bluetooth. Any mobile device running the corresponding mobile application may see the advertisement, and potentially any mobile devices with the application depending on the policy deployed (application) will be able to connect to the tag.
- the executable application referred to above needs to be executed by the user on the mobile communications device 14 .
- the firmware on the tag 10 implements the following states to achieve battery-efficient synchronization and communication between the tag and mobile device (smartphone).
- the main states in this state machine are: VERIFY, ADVERTISE, and CONNECTED.
- VERIFY the tag's components are powered down, except a low-power acceleration chip forming part of accelerometer 24 , which gathers acceleration data at a specified frequency (typically between 5 and 50 Hz depending on hardware and software capabilities), and periodically wakes-up the processor (e.g., once every second or two) using an interrupt. Equivalently, the processor may poll periodically for the acceleration data.
- the processor executes the state machine implemented in the firmware to determine if the state should remain in the VERIFY state, or if it should transition to ADVERTISE.
- This determination is made according to whether the vehicle has been moving for a configurable period of time. If it has not been moving for a specified period of time, the state remains VERIFY; otherwise, it transitions to ADVERTISE.
- a variety of statistical methods operating over the collected acceleration samples may be used to make this determination. For example, if acceleration data is gathered at 10 Hz and the processor is interrupted every 2 seconds, 20 samples of three-axis accelerometer data are processed to make the determination.
- One approach to rest determination is to compute the maximum absolute value of the difference from the mean of the values in each acceleration component. If the maximum in any of the three components is above a configurable threshold A for a configurable amount of time T 1 , then transition to the ADVERTISE state; otherwise, remain in VERIFY.
- the parameters A and T 1 are tunable values in the method.
- advertisements from the tag which consume energy, occur only when the vehicle is deemed to be moving, and stop when a mobile device connects. Such motion-triggered advertisements conserve battery resources.
- the tag may be capable of connecting to multiple mobile devices, in which case the advertisements may continue upon connection to one or more other mobile devices. Advertisements may be terminated after several minutes even if the vehicle is still moving and no mobile device has connected and the tag may then return to the VERIFY state for a certain configurable time.
- the tag 10 is woken up by the accelerometer exceeding a certain measurement threshold for a certain period of time. This is important functionality as it extends the life of the battery 30 by keeping the tag in an ultra-low-power sleep mode when the vehicle is not moving.
- the tag Upon transitioning to the ADVERTISE state, the tag considers a trip to have started and starts logging the acceleration data to its RAM. It may also write this data to persistent storage (e.g., Flash).
- the tag advertises its presence as a Bluetooth peripheral.
- the tag may be configured as a Bluetooth central node, and the phone a peripheral, in which case the transition to the ADVERTISE state causes the tag to start looking for advertisements from the phone. (In this configuration the phone would periodically advertise its presence).
- the block “turn on advertising of BLE” relates to Bluetooth Low energy which can have an advertising state turned on and off, as is well known in the art.
- advertising mode the chip will typically use more battery power and hence this should be used conservatively. Therefore, the tag 10 in an example embodiment will only start advertising once motion is detected to preserve the battery life on the tag 10 .
- the Bluetooth module on the mobile communications device 14 is ON then the device 14 this will connect automatically each time the smart phone is in the vicinity of the tag 10 and the vehicle starts driving. If the Bluetooth module is off, then a “pop up” will be displayed to the user on the display 30 prompting the user to enable Bluetooth.
- the tag 10 is in a dormant/sleep state while the vehicle 12 is not driving. Once the vehicle 12 starts driving, the tag 10 awakens and starts recording accelerometer data. That happens regardless of whether the mobile device is in the vehicle or not.
- the memory therefore needs to be large enough to store enough data to handle several hours of driving in the absence of the user's mobile device 14 .
- the number of hours of recordable data will vary depending on the size of the memory 28 .
- the central node Upon hearing a suitable advertisement, the central node connects to the peripheral.
- the phone central initiates a connection to the tag (peripheral).
- the tag Upon a successful connection, the tag transitions to the CONNECTED state.
- the tag and phone communicate with each other.
- This communication involves the reliable transmission of any data previously logged in the storage of the tag, including information about previous trips, previously detected events (such as hard braking, acceleration, collisions, tampering, etc.), debugging or diagnostic information, and the like.
- the tag After the reliable transmission of this information using a protocol where the phone acknowledges reception, the tag starts streaming live acceleration and other sensor data to the phone.
- the mobile communications device 14 will transmit this combined data (sensor data from the tag 10 and GPS and/or additional sensor data such as position, gyroscope, acceleration from the mobile communications device) to the backend server 18 .
- An example data packet may consist of:
- the data transmitted includes a User ID, Tag ID, and Application ID.
- both the reliable and streaming of this data are done over the Bluetooth, low energy link layer protocol. They could use Bluetooth's notification and indication capabilities for this purpose. It should be apparent that any other wireless communication medium and link layer protocol could also be used, including but not limited to Bluetooth (non-low-energy), WiFi, WiFi-Direct, and the like.
- the streaming of sensor data does not require the short-range Bluetooth radio to be on continuously.
- the radio is turned on only just before the scheduled transmission. For example, the radio may be turned on every second to burst a small number of packets, then be turned off.
- the tag remains in the CONNECTED state until either the connection terminates because the tag and phone are no longer in communication range, or until the tag's firmware determines that the vehicle has not been moving for some period of time T 2 . In either case, the tag transitions to the ADVERTISE state for a period of time T 3 .
- the functions here are the same as in the ADVERTISE state described above. If the vehicle remains at rest for T 4 , the tag transitions to the VERIFY state, where most of the components are powered down.
- the mobile device processes and communicates all information received from the tag to the server.
- the mobile communications device 14 may continue to record only GPS and/or its own sensor data.
- the user can select whether to transmit the data from the mobile communications device 14 to the backend server 18 by way of cellular data or if the data should be stored and transmitted only when the mobile communications device 14 comes into range of a short-range wireless LAN network such as WiFi.
- a short-range wireless LAN network such as WiFi
- the setting on the mobile communications device is to not allow for use of mobile cellular data, then the said data will only be transmitted when the device is connected to a WiFi network.
- the server side software will process this data and return processed or “clean” data back to the mobile communications device to update its currently stored trip and driver behaviour data for display back to the user.
- clean data involves the ability on the backend servers to determine the difference between walking data and driving data, and the types of transport being utilized such as a train or bus.
- any significant acceleration event whose magnitude exceeds a specified configurable threshold A 2 is logged in the persistent storage on the tag. Such events are considered potential collisions and are immediately communicated to the mobile communications device using the communication protocol described above (in the CONNECTED state).
- the microcontroller 22 samples and stores the accelerometer 24 readings including the accelerometer X, Y, and Z values.
- the microcontroller 22 determines from the accelerometer values if a crash/impact has occurred by checking if any of the X, Y or Z values or a combination of the values, e.g., (X ⁇ 2+ ⁇ 2+ ⁇ 2), exceeds a predetermined threshold for a predetermined time period.
- One method is to derive the acceleration components in the vertical (gravity) direction and in the direction perpendicular to gravity, and then consider an impact to have occurred if one or both components exceeds specified threshold values.
- Estimating the direction of gravity may be done in a number of ways, including using a low-pass filter over the entire stream of acceleration data observed thus far over the lifetime of the drive or even longer.
- data from the accelerometer 24 is immediately stored in the memory 28 and simultaneously transmitted via the communications module 32 to the mobile communications device 14 .
- the mobile communications device 14 may augment the data from the tag with its own sensor data such as position and velocity and transmit that to the server in real time.
- Additional sensor information from the near past and near future gathered from the sensors on the mobile communication device can also be transmitted in a crash/impact detection scenario.
- the mobile device (smartphone) 14 is an untrusted device. That is, the telematics data produced by the tag traverses the mobile device en route to the server, but neither the tag nor the server may trust the mobile device, which is owned by a potentially untrusted user.
- the invention includes a method by which the authenticity of the data and messages sent by the tag can be verified by the server, and vice versa.
- the server and the tag each have a well-known public key, with a corresponding secret private key known only to the owner of the key.
- a corresponding secret private key known only to the owner of the key.
- an entity can verify that a recipient can verify the authenticity of the message.
- the invention uses symmetric keys, rather than more expensive public key operations.
- Every tag has a secret internal ID number (S_ID) built into the tag hardware (chip).
- S_ID secret internal ID number
- MAC address device ID
- a secret key K ⁇ (S_ID, deviceID); in one embodiment, the function ⁇ is a bit-wise XOR operation.
- Each message includes an authentication token based on a one-way hash (e.g., SHA-1) of the content appended with K.
- ACK messages from the server also contain an authentication token based on a hash of K, so they are assured to come from the server (the intermediary mobile device never sees either S_ID or K).
- the acknowledged data is purged from the tag's flash; no data purging occurs until a signed ACK for that data is received.
- data acknowledged by the mobile device in the vehicle is not purged from the tag: an authenticated end-to-end acknowledgment from the server is required.
- these logs include event logs, trip duration logs, diagnostic logs, etc.
- acceleration and other sensor data when acceleration and other sensor data is streamed to the mobile device from the tag, it may be discarded by the untrusted mobile application, but it cannot be tampered with or changed without detection by the server. If a rogue application discards the data, the server will not know, but the symptom will be the same as a trip in the trip duration log with no corresponding acceleration data. If a rogue application tries to “eat up” trip log data as well, any subsequent trip showing up at the server will inform the server of missing intermediate trips and missing data, conveying information that something is amiss and broken. That is enough to take corrective measures, including informing the user of possible problems or potentially malicious behavior.
- crash or live event alerts are also sent to the phone without an end-to-end acknowledgement from the server, but they are sent signed so they can be verified as authentic.
- the communication protocol between the tag and mobile device includes link-layer retries, so they are likely to be received at the server as long as the mobile device functions correctly (the data from the mobile device to the server is sent using a reliable protocol like TCP).
- TCP reliable protocol
- the secret key K can be used to encrypt the data.
- Clock updates from the server to the tag can occur whenever phone is online.
- the phone requests a nonce (a one-time message) from tag.
- the phone sends the nonce to the server.
- the server constructs a time token containing the current time and an authenticator based on a hash of the nonce and the key K.
- the tag sets its clock only if the authenticator verifies correctly.
- This clock sync is important so that the accelerometer data stored in the memory 28 can later be tied up with GPS data measured by the executable application running on the mobile communications device 14 and the backend server data.
- the smartphone can be configured to gather and deliver its own sensor data to the server, or to not do so.
- the tag 10 includes a tamper detection mechanism 34 .
- the anti-tamper mechanism uses one or both of the following two methods.
- the first method uses the accelerometer and using an orientation algorithm where the tag 10 once secured to the vehicle will have knowledge of its correction angle in relation to the vehicle travelling direction.
- This algorithm computes the rotation matrix that converts from the axes of the tag's accelerometer to the axes corresponding to the vehicle's frame of reference. Should the tag 19 experience any sudden changes in this orientation the most likely reason is a movement of the affixed tag, which would be considered tampering. This tampering event will be recorded in the tag flash memory and transmitted securely to the backend server. The detection of such tampering reduces potential fraud.
- the second method uses a light sensor chip included in the tag 10 , which will be covered by the tag housing.
- the piece of the housing When removing the tag from its intended position, the piece of the housing will be broken, and the light sensor will be exposed. This, in turn, will trigger a tamper event, which will be transmitted to the flash memory 28 and then sent via the mobile device 14 to the server 18 .
- the microcontroller 22 runs an orientation algorithm that aligns the axes of the accelerometer of the tag 10 to the coordinate system of the vehicle 12 regardless of how the tag 10 is placed in the vehicle.
- This orientation algorithm can be run on the tag 10 or the mobile device 14 or the back-end server.
- the computed orientation is configured on the tag, enabling the tag to detect events using only its own computation.
- the orientation algorithm will run when the vehicle is in motion until the point that the microcontroller 22 is convinced that it is correctly aligned with the vehicle. Once this occurs the microcontroller 22 will not run the algorithm again unless it is physically removed from its placement and replaced on the vehicle.
- the combination of the sensor tag and smartphone sensor data may be used as follows to determine whether the smartphone is on the driver's or passenger's side of the vehicle.
- the method requires knowledge of where in the vehicle the tag is affixed, which is easy to record in a database.
- the method uses the property that the centripetal acceleration experienced by any object depends on the radius of the turn being made, in the frame of reference of the car. This information may be derived using the method disclosed in U.S. patent application Ser. No. 13/832,456 and PCT Application Number: PCT/US14/30174.
- this acceleration is equal to the product of the radius of the turn and the square of the angular velocity. Because angles are swept at the same rate as observed anywhere in the turning vehicle, the acceleration experienced depends on the radius alone.
- the signal strength of the radio transmissions from the tag is available on the smartphone. Knowing the tag's position enables such an estimate to be obtained as long as the tag is not equi-distant from the front and back seats. For example, a tag affixed to the front or rear windshield would provide the required degree of demarcation.
- the server 18 includes a number of modules to implement the present invention and the associated memory 20 .
- modules described below may be implemented by a machine-readable medium embodying instructions which, when executed by a machine, cause the machine to perform any of the methods described above.
- modules may be implemented using firmware programmed specifically to execute the method described herein.
- modules illustrated could be located on one or more servers operated by one or more institutions.
- modules form a physical apparatus with physical modules specifically for executing the steps of the method described herein.
- a communication module 52 receives data that has been transmitted by the mobile communications device 14 .
- An analyzing module 54 then analyses the received data to determine driver behaviors.
- a calculation module 56 uses the analyzed data to calculate a reward for the user such as reduced premiums on an insurance plan for the motor vehicle.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/529,812 US20150312655A1 (en) | 2014-04-29 | 2014-10-31 | System and Method for Obtaining Vehicle Telematics Data |
US16/398,083 US10440451B2 (en) | 2014-04-29 | 2019-04-29 | System and method for obtaining vehicle telematics data |
US16/559,726 US11082758B2 (en) | 2014-04-29 | 2019-09-04 | System and method for obtaining vehicle telematics data |
US16/904,679 US11363355B2 (en) | 2014-04-29 | 2020-06-18 | System and method for obtaining vehicle telematics data |
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2014
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2017
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2018
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2019
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2020
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- 2020-07-06 CY CY20201100619T patent/CY1123132T1/el unknown
- 2020-08-04 CY CY20201100716T patent/CY1123440T1/el unknown
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2022
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