USRE49322E1 - Portable device detection - Google Patents

Portable device detection Download PDF

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Publication number
USRE49322E1
USRE49322E1 US17/109,637 US201517109637A USRE49322E US RE49322 E1 USRE49322 E1 US RE49322E1 US 201517109637 A US201517109637 A US 201517109637A US RE49322 E USRE49322 E US RE49322E
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United States
Prior art keywords
portable device
tone
receipt
transducer
ellipse
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Application number
US17/109,637
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English (en)
Inventor
Patrick Kevin Holub
John Robert Van Wiemeersch
Adil Nizam SIDDIQUI
Jeffrey Allen Greenberg
Brad Alan Ignaczak
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Ford Global Technologies LLC
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Ford Global Technologies LLC
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    • 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
    • H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
    • H04M1/72457—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions according to geographic location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6008—Substation equipment, e.g. for use by subscribers including speech amplifiers in the transmitter circuit
    • 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
    • H04M1/725—Cordless telephones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings

Definitions

  • Conventional vehicle systems may include user settings transferrable between vehicles.
  • the user settings may include preferred radio stations, preferred climate control settings, etc.
  • multiple vehicle occupants may have differing user settings when occupying the same vehicle.
  • FIG. 1 is a block diagram of a system for determining a location of a portable device in a vehicle.
  • FIG. 2 is an exemplary process for determining the location of the portable device in the vehicle.
  • FIG. 3 is another exemplary process for determining the location of the portable device in the vehicle.
  • FIG. 4 is another exemplary process for determining the location of the portable device in the vehicle.
  • FIG. 5 is another exemplary process for determining the location of the portable device in the vehicle.
  • FIG. 6 is a plan view of a vehicle with a pair of portable devices.
  • FIG. 7 is a plan view of the vehicle illustrating determining the location of the portable devices using trilateration with circles.
  • FIG. 8 is a plan view of the vehicle illustrating determining the location of the portable devices using trilateration with ellipses.
  • FIG. 1 illustrates a system 100 including a portable device 120 communicatively coupled, e.g., via a known wireless protocol, to a vehicle 101 computing device 105 .
  • the computing device 105 is programmed to receive collected data 115 , from one or more data collectors 110 , e.g., vehicle 101 sensors, concerning various metrics related to the vehicle 101 .
  • the metrics may include a velocity of the vehicle 101 , vehicle 101 acceleration and/or deceleration, data related to vehicle 101 path or steering, audio tones from the vehicle 101 cabin, biometric data related to a vehicle 101 operator, e.g., heart rate, respiration, pupil dilation, body temperature, state of consciousness, etc.
  • the computing device 105 may be programmed to collect data 115 from the vehicle 101 in which it is installed, sometimes referred to as a host vehicle 101 , and/or may be programmed to collect data 115 about a second vehicle 101 , e.g., a target vehicle.
  • vehicle systems and components e.g., a steering system, a powertrain system, a brake system, internal sensing, external sensing, etc.
  • the computing device 105 may be programmed to collect data 115 from the vehicle 101 in which it is installed, sometimes referred to as a host vehicle 101 , and/or may be programmed to collect data 115 about a second vehicle 101 , e.g., a target vehicle.
  • the computing device 105 is generally programmed for communications on a controller area network (CAN) bus or the like.
  • the computing device 105 may also have a connection to an onboard diagnostics connector (OBD-II).
  • OBD-II onboard diagnostics connector
  • the computing device 105 may transmit messages to various devices in a vehicle 101 , e.g., devices 120 discussed below, and/or receive messages from the various devices, e.g., controllers, actuators, sensors, etc., including data collectors 110 .
  • the CAN bus or the like may be used for communications between devices represented as the computing device 105 in this disclosure.
  • the data store 106 may be of any known type, e.g., hard disk drives, solid-state drives, servers, or any volatile or non-volatile media.
  • the data store 106 may store the collected data 115 sent from the data collectors 110 .
  • the vehicle 101 may include one or more transducers 107 .
  • the transducers 107 may include known devices that produce tones, i.e. sound waves, at various frequencies, e.g., ultrasonic tones with frequencies above the human hearing range (e.g. in excess of 20 kHz), subsonic tones with frequencies below the human hearing range (e.g. below 20 Hz), sound waves within the human hearing range, etc.
  • a transducer 107 may be situated in various parts of the vehicle 101 , including, e.g., an instrument panel, a vehicle door, a vehicle pillar, etc.
  • transducers 107 may send tones at specific frequencies and/or with specific signatures, such that the tone can be identified as sent from a particular transducer at a particular time.
  • Data collectors 110 may include a variety of devices. For example, various controllers in a vehicle may operate as data collectors 110 to provide data 115 via the CAN bus, e.g., data 115 relating to vehicle speed, acceleration, system and/or component functionality, etc., of any number of vehicles 101 . Further, sensors or the like, could be included in a vehicle and configured as data collectors 110 to provide data directly to the computer 105 , e.g., via a wired or wireless connection.
  • Yet other data collectors 110 could include cameras, microphones, breathalyzers, motion detectors, etc., i.e., data collectors 110 to provide data 115 for evaluating a condition or state of a vehicle 101 operator and/or collect audio and/or visual data from the vehicle 101 cabin. Further still, the data collectors 110 may include a receiving device configured to receive ultrasonic tones from the transducer 107 .
  • Collected data 115 may include a variety of data collected in a vehicle 101 . Examples of collected data 115 are provided above, and moreover, data 115 is generally collected using one or more data collectors 110 , and may additionally include data calculated therefrom in the computer 105 . In general, collected data 115 may include any data that may be gathered by the data collectors 110 and/or computed from such data.
  • the portable device 120 may be any one of a variety of computing devices including a processor and a memory, as well as communication capabilities that is programmed to be worn on an operator's body.
  • the portable device 120 may be a wearable device, e.g. a watch or a smart watch, a smartphone, a tablet, a personal digital assistant, a watch-phone pairing, a vibrating apparatus, etc. that includes capabilities for wireless communications using IEEE 802.11, Bluetooth, and/or cellular communications protocols.
  • the portable device 120 may use such communications capabilities to communicate directly with a vehicle computer 105 , e.g., using Bluetooth.
  • the portable device 120 may store in its memory vehicle 101 settings, e.g.
  • the present system 100 advantageously provides a determination of respective locations of one or more portable devices 120 in the vehicle 101 , can then apply settings of a selected portable device, e.g., a wearable device worn by an occupant of an operator's seat, accordingly.
  • FIG. 2 illustrates a process 200 for determining a location of the portable device 120 in the vehicle 101 .
  • the process 200 starts in a block 205 , in which the computing device 105 sends a notification to the portable device 120 .
  • the notification notifies the portable device 120 that the computing device 105 will begin determining the location of the portable device 120 .
  • the notification may be a radiofrequency (RF) signal, e.g. RF 1 shown in FIG. 7 , sent, e.g., over a network, including over WiFi, Bluetooth, etc.
  • RF radiofrequency
  • the computing device 105 provides an instruction to a first transducer 107 to generate a first tone.
  • the first tone may be an ultrasonic tone, i.e., a sound wave having a frequency in excess of 20 kHz, which may be outside the typical known range of a human's hearing but within the sound detection capability of the portable device 120 .
  • the first tone can be received by the portable device 120 in the vehicle 101 .
  • the computing device 105 records the time of sending the instruction.
  • the computing device 105 may provide the instruction to the first transducer 107 substantially simultaneously as the start notification.
  • the portable device 120 sends a first receipt notification upon receipt of the first tone.
  • the first receipt notification may be an RF signal such that the computing device 105 may receive the first receipt notification nearly immediately after the portable device 120 receives the first tone.
  • the computing device 105 Upon receipt of the receipt notification by the receiving device, the computing device 105 records the time of receipt.
  • the computing device 105 determines whether there is another transducer 107 that must send a respective tone.
  • a vehicle 101 may include three transducers 107 , and the computing device 105 may repeat the steps 205 - 215 for each transducer. If the computing device 105 determines that another transducer 107 must send a tone, the process returns to the bock 205 to repeat the steps 205 - 215 . If all transducers 107 have generated their tones, the process continues in a block 225 .
  • the computing device 105 determines respective time differences between each notification and its respective receipt notification.
  • the computing device 105 compares the recorded time for each notification to the recorded time for each response notification to find a time difference for each transducer 107 .
  • a first time difference TD 1 is the time between the first start notification sent by the computing device 105 and the first response notification received by the computing device 105 .
  • the computing device 105 repeats this calculation of the time difference for all transducers 107 .
  • the computing device 105 may account for the time delay of the notifications and the receipt notifications if the time of RF propagation for the notifications and the receipt notifications are large enough to affect the time differences.
  • the computing device 105 determines the location of the portable device 120 based on the time differences, and the process 200 ends.
  • the location may be determined using trilateration based on the distance of the portable device 120 to the transducers 107 .
  • Trilateration refers to the known technique of determining distances between points using geometric characteristics of circles, triangles, ellipses, ellipsoids, and/or spheres.
  • the distance from the first transducer 107 to the receiving device T 1 is known to the computing device 105 and is fixed, e.g., when the first transducer 107 is mounted on a fixed surface, as shown in FIG. 6 .
  • the distance T 1 may be determined when the vehicle 101 door is closed, providing a consistent measurement for T 1 .
  • the vehicle 101 door may include data collectors 110 , e.g. angle sensors, to detect the angle of an open vehicle 101 door, and the distance T 1 may be determined based on the measurement from the data collectors 110 . That is, if the first transducer 107 is at a specified location that is not fixed, the distance T 1 may be determined with additional data collectors 110 .
  • the distance defines a radius along which the portable device 120 may be located from the first transducer 107 , as shown in FIG. 7 .
  • this distance R 1 alone cannot determine the location of the portable device 120 , as explained further below.
  • the distances from the second and third transducers 107 and the portable device 120 may be similarly determined, producing a second distance R 2 and a third distance R 3 respectively, as shown in FIG. 7 .
  • Each distance defines a radius with the respective transducer 107 at the center along which the portable device is located.
  • the three distances meet at a single point—the location of the portable device 120 in the vehicle 101 , as shown in FIG. 7 . That is, the location of the portable device 120 is determined based on the time differences using trilateration.
  • the radii R 1 , R 2 , R 3 define spheres around the transducers 107 .
  • the spheres similarly resolve to a single point, being the location of the portable device 120 .
  • FIG. 3 illustrates another exemplary process 300 for determining a location of the portable device 120 in the vehicle 101 .
  • the process 300 starts in a block 305 where the computing device 105 sends an instruction to the portable device 120 to generate a tone.
  • the instruction may be a notification sent over an RF signal, e.g. RF 1 as shown in FIG. 7 .
  • the portable device 120 generates the tone.
  • the tone may be an ultrasonic tone, i.e., having a frequency in excess of 20 kHz, and travels through the air in the vehicle 101 .
  • the tone may alternatively have a frequency at or below 20 kHz.
  • the portable device 120 also sends a receipt notification, e.g. RF 2 as shown in FIG. 7 , to the computing device 105 indicating the generation of the tone.
  • a plurality of data collectors 110 receive the tone.
  • the data collectors 110 may be located in the same locations as the transducers 107 shown in FIGS. 6-8 .
  • each receiving device records the time of receipt of the tone.
  • the computing device 105 collects a time of receipt of the tone for each receiving device and calculates a respective time difference for each receiving device. As described in the block 225 above, the computing device compares the time of the receipt notification to the time of the receipt of the tone to determine a time difference for each receiving device.
  • the computing device 105 determines the location of the portable device 120 based on the time differences, and the process 300 ends. As in the block 230 above, the computing device 105 uses the time differences to determine radii around the receiving devices, from which the location of the portable device 120 is determined using trilateration, as shown in FIG. 7 .
  • FIG. 4 illustrates another exemplary process 400 for determining the location of the portable device 120 .
  • the process 400 starts in a block 405 , where the computing device 105 starts a timer, e.g., starts recording periods of time.
  • a timer e.g., starts recording periods of time.
  • the computing device 105 provides an instruction to actuate the first transducer 107 to generate the first tone.
  • the tone may be, e.g., an ultrasonic tone.
  • the portable device 120 upon receipt of the first tone, generates a second tone.
  • the second tone may be, e.g., an ultrasonic tone.
  • the computing device 105 receives the second tone via the receiving device and records the time of receipt of the second tone.
  • the computing device 105 determines if there are other transducers 107 that have not generated tones. If so, the computing device 105 repeats the steps 405 - 420 for each transducer 107 . If all transducers 107 have generated tones, the process continues in a block 430 .
  • the computing device 105 determines the location of the portable device 120 based on the times of receipt. As shown in the example of FIG. 6 , the distance between the transducers 107 and the receiving device is known for all transducers. As shown in FIG. 8 , each transducer and the receiving device serve as foci that define an ellipse having a major axis defined by the portable device 120 .
  • the computing device 105 may define an ellipse on which the portable device 120 must be located.
  • the computing device 105 may define ellipses for all transducers 107 ; for example, if the vehicle 101 includes three transducers 107 , the computing device 105 may define major axes L 2 , L 3 for the second and third transducers, respectively, and thus define a total of three ellipses.
  • the three ellipses intersect at a single point—the portable device 120 .
  • the computing device 105 may use trilateration to determine the position of the portable device 120 using ellipses defined by the locations of the transducers and the receiving devices, and the major axis for each ellipse as defined by the time of receipt. If the transducers 107 are not in the same plane, as described above, the major axes L 1 , L 2 , L 3 define ellipsoids that intersect at the location of the portable device 120 .
  • the computing device 105 may alternatively compare the times of receipt to determine the location of the portable device 120 .
  • a first transducer 107 may be located in front of a vehicle operator
  • a second transducer 107 may be located in front of a vehicle passenger
  • a third transducer 107 may be located behind a vehicle passenger.
  • the first transducer 107 produces a first time of receipt TD 1
  • the second transducer 107 produces a second time of receipt TD 2
  • the third transducer 107 produces a third time of receipt TD 3 .
  • the portable device 120 is closest to the first transducer 107 , if TD 1 is smaller than either of TD 2 or TD 3 (i.e., TD 1 ⁇ TD 2 , TD 3 ), then the portable device 120 is closest to the first transducer 107 , and the portable device 120 may be located near the vehicle operator. Similarly, if TD 2 ⁇ TD 1 , TD 3 , then the portable device 120 may be located near the vehicle passenger in a front passenger seat. And if TD 3 ⁇ TD 1 , TD 2 , then the portable device 120 may be located in a rear passenger seat.
  • FIG. 5 illustrates another exemplary process 500 for determining the location of the portable device 120 .
  • the process 500 begins in a block 505 , where the computing device 105 sends an instruction to all transducers 107 to generate tones simultaneously.
  • the portable device 120 receives a first tone.
  • the portable device 120 starts a timer upon receipt of the first tone.
  • the portable device 120 receives another tone.
  • the portable device 120 upon receipt of the tone, records the time of receipt of the tone from the timer.
  • the time of receipt is the time difference from the receipt of the first tone to the receipt of the current tone.
  • the portable device 120 determines if all tones have been received.
  • the portable device 120 may know the number of transducers 107 , and may be programmed to receive the same number of tones. That is, the portable device 120 will record times of receipt for tones for each transducer 107 . If the portable device 120 has not received all of the tones, the process 500 returns to the block 520 and repeats the steps 520 - 530 for all transducers 107 . Alternatively, the process 500 may collect as many tones as possible during a predetermined time window. Otherwise, the process continues in a block 535 .
  • the portable device 120 sends a receipt notification to the receiving device to provide information to the computing device 105 with the times of receipt for each transducer 107 .
  • the computing device determines the location of the portable device 120 based on the times of receipt. As shown in FIG. 7 and described in the processes 200 , 300 , the computing device 105 can determine the position of the portable device 120 according to trilateration using the times of receipt to determine radii defining circles around the transducers 107 ; where the circles intersect is the location of the portable device 120 .
  • FIG. 6 illustrates a portion of an exemplary vehicle 101 including transducers 107 disposed in the vehicle 101 instrument panel and in a vehicle 101 door.
  • the data collector 101 e.g. the receiving device, may be disposed in a vehicle 101 rearview mirror.
  • two portable devices 120 e.g. smart watches, are being worn in the vehicle 101 .
  • One of the portable devices 120 may be worn on a wrist of a vehicle operator, and is shown here close to a vehicle 101 steering wheel where the operator's wrist may be located.
  • the other portable device 120 may be located on the wrist of an occupant in a vehicle 101 passenger seat.
  • the portable device 120 worn by the operator can be located and vehicle 101 settings from the operator's portable device 120 may be applied.
  • the portable device 120 may be determined to be located on the operator's side of the vehicle 101 cabin, and the computing device 105 may apply user settings from that portable device 120 and ignore the portable device 120 located on the passenger's side of the vehicle 101 cabin.
  • FIG. 6 illustrates the distances between the transducers 107 and the receiving device, here a data collector 110 .
  • the distance T 1 is the distance from the data collector 110 to the first transducer 107 ;
  • the distance T 2 is the distance from the data collector 110 to the second transducer 107 ;
  • the distance T 3 is the distance from the data collector 110 to the third transducer 107 .
  • the distances T 1 , T 2 , T 3 are known and may be stored in the data store 106 .
  • FIG. 7 illustrates a portion of an exemplary vehicle 101 .
  • the computing device 105 uses the time differences to determine the distances from the transducers 107 to the portable device 120 with trilateration. For example, as shown in FIG. 6 , the distance T 1 from the first transducer 107 and the receiving device is predetermined and stored in the data store 106 .
  • the receiving device receives the receipt notification RF 2 from the portable device 120 and determines a time difference TD 1 between the first tone and the first response tone. e.g., the amount of time between the notification RF 1 and the receipt notification RF 2 .
  • the distance R 1 defines a circle C 1 around the transducer 107 on which the portable device 120 falls.
  • the distance T 2 shown in FIG. 6 , from the second transducer 107 to the receiving device is known and stored in the data store 106 .
  • the time difference TD 2 is determined similarly to TD z described above. Based on the time difference TD 2 , the distance R 2 and defined circle C 2 around the second transducer 107 is determined.
  • the circle C 1 and the circle C 2 intersect at two points, I 1 and I 2 , and with the calculations from two transducers, the portable device 120 may be at either point I 1 or I 2 .
  • the distance T 3 shown in FIG. 6 , from the third transducer 107 to the receiving device is known and stored in the data store 106 .
  • the time difference TD 3 is determined similarly to TD 1 and TD 2 .
  • the distance R 3 and defined circle C 3 around the third transducer 107 is determined.
  • the circles C 1 , C 2 , C 3 intersect at a single point, I 1 , which is the location of the portable device 120 , i.e. on the operator's side of the vehicle 101 .
  • FIG. 7 illustrates two portable devices 120 , and the calculations described above may be similarly applied to the second portable device 120 .
  • the second portable device 120 is located on the passenger's side of the vehicle 101 .
  • the computing device 105 having determined the location of both portable devices 120 , may apply settings only from the portable device 120 on the operator's side of the vehicle 101 .
  • FIG. 7 further illustrates the notification and the receipt notification.
  • a data collector 110 e.g. an RF antenna, can send and receive RF signals over, e.g., the network 120 , and relay the signals to the computing device 105 .
  • the computing device 105 may send the notification as an RF signal RF 1 to start, e.g., the processes 200 , 300 .
  • the portable device 120 may send a receipt notification as an RF signal RF 2 to send data regarding, e.g., the time of receipt of tones, the time of sending tones, etc.
  • FIG. 8 illustrates another portion of another exemplary vehicle 101 , including two portable devices 120 that arc located according to the process 400 above, using the ellipse calculation.
  • the transducer 107 and the receiving device are the foci of the ellipse, and the portable device 120 defines the major axis of the ellipse.
  • the major axis L 1 is the distance from the transducer 107 to the portable device 120 added to the distance from the portable device 120 to the receiving device.
  • Major axes L 2 , L 3 may be similarly defined for the other transducers 107 .
  • the three ellipses intersect at a single point I 1 , the location of the portable device 120 .
  • the adverb “substantially” modifying an adjective means that a shape, structure, measurement, value, calculation, etc. may deviate from an exact described geometry, distance, measurement, value, calculation, etc., because of imperfections in materials, machining, manufacturing, sensor measurements, computations, processing time, communications time, etc.
  • Computing devices 105 generally each include instructions executable by one or more computing devices such as those identified above, and for carrying out blocks or steps of processes described above.
  • Computer-executable instructions may be compiled or interpreted from computer programs created using a variety of programming languages and/or technologies, including, without limitation, and either alone or in combination, JavaTM, C, C++, Visual Basic, Java Script, Perl, HTML, etc.
  • a processor e.g., a microprocessor
  • receives instructions e.g., from a memory, a computer-readable medium, etc., and executes these instructions, thereby performing one or more processes, including one or more of the processes described herein.
  • Such instructions and other data may be stored and transmitted using a variety of computer-readable media.
  • a file in the computing device 105 is generally a collection of data stored on a computer readable medium, such as a storage medium, a random access memory, etc.
  • a computer-readable medium includes any medium that participates in providing data (e.g., instructions), which may be read by a computer. Such a medium may take many forms, including, but not limited to, non-volatile media, volatile media, etc.
  • Non-volatile media include, for example, optical or magnetic disks and other persistent memory.
  • Volatile media include dynamic random access memory (DRAM), which typically constitutes a main memory.
  • DRAM dynamic random access memory
  • Computer-readable media include, for example, a floppy disk, a flexible disk, hard disk, magnetic tape, any other magnetic medium, a CD-ROM, DVD, any other optical medium, punch cards, paper tape, any other physical medium with patterns of holes, a RAM, a PROM, an EPROM, a FLASH-EEPROM, any other memory chip or cartridge, or any other medium from which a computer can read.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Environmental & Geological Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Lock And Its Accessories (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
US17/109,637 2015-10-16 2015-10-16 Portable device detection Active USRE49322E1 (en)

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US15/757,000 US10735895B2 (en) 2015-10-16 2015-10-16 Portable device detection
PCT/US2015/055926 WO2017065799A1 (en) 2015-10-16 2015-10-16 Portable device detection
US17/109,637 USRE49322E1 (en) 2015-10-16 2015-10-16 Portable device detection

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DE (1) DE112015007024T5 (es)
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US20190149950A1 (en) 2019-05-16
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