NL2025446A - Anonymous proximity tracing system, using audio- and radio transmitter and receiver - Google Patents

Anonymous proximity tracing system, using audio- and radio transmitter and receiver Download PDF

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NL2025446A
NL2025446A NL2025446A NL2025446A NL2025446A NL 2025446 A NL2025446 A NL 2025446A NL 2025446 A NL2025446 A NL 2025446A NL 2025446 A NL2025446 A NL 2025446A NL 2025446 A NL2025446 A NL 2025446A
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unique
code
reception
transmission
codes
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NL2025446A
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NL2025446B1 (en
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Van Driel Jacobus
Dietmar Boon Van Ochssee Walther
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Maritime Medical Applications B V
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
    • G08B21/0241—Data exchange details, e.g. data protocol
    • G08B21/0258—System arrangements wherein both parent and child units can emit and receive
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
    • G16H50/80—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for detecting, monitoring or modelling epidemics or pandemics, e.g. flu

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Engineering & Computer Science (AREA)
  • Child & Adolescent Psychology (AREA)
  • Epidemiology (AREA)
  • Pathology (AREA)
  • Databases & Information Systems (AREA)
  • Data Mining & Analysis (AREA)
  • Primary Health Care (AREA)
  • Biomedical Technology (AREA)
  • Business, Economics & Management (AREA)
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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention is in the field of a system for anonymous proximity tracing, comprising a multitude of mobile devices, each mobile comprising a loudspeaker for transmitting an audio signal in the range of >15 kHz, and a microphone for receiving an audio signal in the range of >15 kHz, a transmitter for transmitting a radio signal in the range of 2.4 — 5 GHz, a receiver for receiving a radio signal in the range of 2.4 — 5 GHz, the received audio and/or radio signal comprising a unique reception code.

Description

Anonymous proximity tracing system, using audio- and radio transmitter and receiver
FIELD OF THE INVENTION The present invention is in the field of public and individual healthcare. Tracing of individual persons that have been in close proximity to each other during a certain amount of time can be of interest for the individuals involved and the general public. Such is the case when there is an outbreak of an infectious disease or when there certain individuals carrying a pathogen without experiencing any symptoms. Privacy of the individuals involved is typically a concern.
BACKGROUND OF THE INVENTION The present invention is in the field of a public and individual healthcare when there is an outbreak of an infectious disease or when there are individuals in the general population that may carry pathogens that could be harmful to other individuals, without showing any symptoms or that are not aware of their status. For instance when there is an outbreak of an infectious disease, this disease will have a certain incubation period. During this period an infected individual might already be contagious for other individuals without being aware of this. When the infected individual gets diagnosed or tests positively, he/she might want to share this information with all individuals to whom this might be relevant or with public healthcare services. Most people typically want to inform, help and protect other people in their community. However, they want to be in control and have their privacy respected and do not want their personal information to be stored, shared, exchanged, transmitted or likewise. The invention can enable individuals to take part in an collective effort within an institution, community or society to be traceable for a certain amount of time when they themselves or any other individual participating, indicates that he/she has tested positive or is diagnosed with an infectious disease. They can opt to share this information with other
- 2 = individuals that they have been in close proximity with and/or public health care services.
Individuals typically want to stay anonymous and only share their status with their doctors or medical team and their family or close friends. However, people will have been in close proximity to many people they do not know, while travelling, at work or at any other physical place where there are more people present. Therefore a system that can inform these individuals of the positive diagnose/test of this individual can hold significant value to the other individuals and or the relevant health services.
Trust is a key factor for people to use any system. And for the system to work best, it is important that as many as possible will use the system.
In principle it is possible to use systems to collect, process and distribute this type of information, but they typically come at high cost: compromising the privacy of some or all of the participants to a certain degree. Security of the technology used is another concern for many users. They might store data in a centralized form, use logins or tokens, make a connection with other devices (like a Bluetooth connection) or use software and API’s to connect in some form or shape to government services.
The present invention relates to a system that individuals can use without being at risk for loss or leaks of personal data, with their privacy protected and in control of whom they want to share their status with. By staying anonymous, people can use the system knowing they are in control.
This overcomes one or more of the above disadvantages, without jeopardizing privacy, security, functionality and advantages.
SUMMARY OF THE INVENTION The present invention relates in a first aspect to an anonymous proximity tracing system according to claim 1. Thereby the present invention provides a solution to one or more of the above mentioned problems. Advantages of the present invention are detailed throughout the description. The present system comprises a multitude of mobile devices, each
- 3 = mobile device comprising a loudspeaker for transmitting a signal in the range of >15kHz, preferably >20kHz, the transmitted audio signal comprising a unique transmission code, a microphone for receiving a signal in the range of >15kHz, preferably >20kHz, the received audio signal comprising a unique reception code, a timer for identifying a reception period of the unique reception code, and for timing at least one period of transmission of a unique transmission code, and optionally of an interval between transmission periods, which may be regarded as a lighthouse model, a unique random transmission code generator, each unique transmission code comprising at least 50 bits, preferably at least 100 bits, more preferably at least 256 bits, the unique code comprising a lead-code for identifying the system, and for generating new unique codes at a set-rate, a memory for storing the unique transmission and reception codes, time of generation or reception of said unique codes, and at least one controller for instructing the memory to store a unique reception code, wherein the at least one controller is adapted to measure a length of a reception period of the reception of the unique reception code, to compare said length with a pre- set threshold length, to compare a signal strength of reception of said unique reception code with a pre-set threshold level of signal strength, and to discard said unique reception code if the length of the reception period thereof is less than the threshold length or if the signal strength is less than the pre-set level of signal strength, or to store said unique reception code otherwise.
In a second aspect the present invention relates to a computer program for proximity tracing comprising instructions loaded on at least one computer for carrying out the following steps: generating a unique transmission code at a set-rate, each unique transmission code comprising at least 50 bits, the unique code comprising a lead-code for identifying the system, transmitting an audio signal in the range of >15 kHz, prefer- ably 2>20kHz, the transmitted audio signal comprising the unique transmission code, receiving an audio signal in the range of >15 kHz, preferably
- 4 - of >20kHz, the received audio signal comprising a unique reception code, optionally transmitting a radio signal in the range of 2.4 - 5 GHZ, the transmitted radio signal comprising the unique transmission code, optionally receiving a radio signal in the range of 2.4 - 5 GHz, the received radio signal comprising the unique reception code, identifying a reception period of unique reception codes, timing at least one period of transmission of the unique transmission codes, optionally timing of an interval between transmission periods, measuring the signal strengths of audio signal and optional radio signal of each unique reception of a code, storing the unique transmission and reception codes, and time of generation or reception of said unique codes, in a memory, measuring a length of a reception period of the reception of the unique reception code, and the signal strength of audio signal and optional radio signal of the unique reception code, comparing said length with a pre-set threshold length, comparing signal strength of reception of said unique reception code from audio signal and optional radio signal with a pre-set threshold level of signal strength, and discarding said unique reception code if the length of the reception period thereof is less than the threshold length or if the signal strength is less than the pre-set level of signal strength, or storing said unique reception code otherwise.
In a third aspect the present invention relates to a mobile device comprising a computer program according to the invention.
Advantages of the present invention are amongst others that there is no (need for a) central database, there are no logins, no connections are made and no data is exchanged between devices, no government or official agencies are involved, all code can be made public, only random unidue codes are transmitted and received, a user can anonymously and voluntarily decide to upload his/her codes in case of testing positive to a public website he/she trusts, when a match
— 5 = occurs, users receiving that code/match are free to decide what action they want to take, and after a set time all codes will be deleted from all devices.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates in a first aspect to an anonymous system according to claim 1. In an exemplary embodiment the present system comprises a transmitter for transmitting signals in the 2.4 - 5 GHz range, the transmitted radio signal comprising the unique transmission code, a receiver for receiving signals in the 2.4 — 5 GHz range, the received radio signal comprising the unique transmission code, and optionally at least one controller to provide the same unique code transmitted over radio and audio, wherein the at least one controller is adapted to compare a length of the radio signal, and to compare a signal strength of the audio signal. In an exemplary embodiment of the present system the length of the reception period is a combined length of 2-1000 reception periods. In an exemplary embodiment of the present system the length of the transmission period is a combined length of 2- 1000 transmission periods. In an exemplary embodiment of the present system the distance between a location of a loudspeaker transmitting a unique transmission code and a microphone receiving said code is measured or calculated, and wherein said distance is stored with the unique transmission code. In an exemplary embodiment of the present system upon activation for a given period of possible infection time, unique transmission codes transmitted during said possible infection time are transmitted to all mobile devices in the system. In an exemplary embodiment of the present system communication is through a publicly accessible medium, such as a website, through sending said unique transmission codes to mobile devices in the system, or a combination thereof. In an exemplary embodiment of the present system the controller is adapted to compare system wide communicated
— 6 _ unique transmission codes with the unique reception codes stored on the device, and to generate a warning, such as a request to apply for a test, such as an infectious disease- test (like the COVID19-virus).
In an exemplary embodiment of the present system the mobile device comprising a switch for turning the system on or off and to set sensitivity, expiry date of data storage and data deletion.
In an exemplary embodiment of the present system the mobile device is adapted to detect sneezing, or a position of a user thereof, or activity of a user thereof.
The invention is further detailed by the accompanying examples, which are exemplary and explanatory of nature and are not limiting the scope of the invention. To the person skilled in the art it may be clear that many variants, being obvious or not, may be conceivable falling within the scope of protection, defined by the present claims.
EXAMPLES/EXPERIMENTS The invention although described in detailed explanatory context may be best understood in conjunction with the accompanying examples.
Practical example Step by Step instructions on using anonymous proximity tracing system would consist of setting up a (mobile) device, downloading and installing software, connecting radio and audios transmitters and receivers and temporarily storing randomly generated codes. The user could typically switch the application on- and off, set the sensitivity, set the expiry date of the kept codes, receive notifications when another code indicates a positive test, transmit a positive test outcome to other users and/or healthcare services and delete any or all codes kept.
An application on a mobile device generates a randomly generated unique code consisting of at least 100 numbers and changes this code at a user pre-set rate (like 30 minutes). A system-identifying string of code can be placed before this unique code to build a unique transmitter code. The system
- 7 = broadcasts this unique transmitter code over high-frequency audio at low volume levels, during a pre-set period. It could also transmit this unique code over ultra-high frequency radio simultaneously. No connection is made (‘lighthouse model’) with other devices. No information is broadcasted other than the random unique code.
The system listens during a pre-set period for codes from nearby devices. Any received codes are briefly kept in a buffer and processed taking into account relevant parameters of a specific received code as duration of reception, strength of signal(s), combined reception over channels if applicable, time of day, etc. The level of sensitivity versus specificity criteria (‘risk-profile’) can be set by the user and can have some pre-set levels.
Unique codes that meet the pre-set level of parameters/risk-profile are stored in a longer-term memory for a user pre-set amount of time (like 3 weeks) including their timestamp. Any codes in the processing buffer that do not meet the criteria and all codes that exceed the set time limit in memory are deleted.
If a user tests positive or is diagnosed with an infectious disease, he or she can opt to inform their ‘code- contacts’ on a voluntary basis. They can also inform the relevant health authorities if they opt to. This is up to the user. In that case they can send or transmit their codes to a public medium, such as a website, over a secure connection. A user can decide to trust this website or have several websites available to choose from. The websites only displays publicly the unique codes with timestamp from users who identified themselves as testing positive and who opted to share this information.
After a set amount of time all codes are deleted automatically.
All devices will, at a regular user pre-set interval, collect or download the public available unique codes from user pre-set trusted websites, with their timestamp and compare those codes timestamp, with the codes and timestamps stored in memory. If there is a match the system will inform the user of the match and the relevant data (time). There
- 8 - could be more matches in a series, depending on set levels of refreshing codes and so on. The user can decide to get tested or not. In any case, after a certain user pre-set amount of time all codes and data will be deleted.
For the purpose of searching the following section is provided, of which the next section represents a translation into Dutch.
1. System for proximity tracing, comprising a multitude of mobile devices, each mobile device comprising: a loudspeaker for transmitting a signal in the range of >15kHz, preferably >20kHz, the transmitted audio signal comprising a unigue transmission code, a microphone for receiving a signal in the range of >15kHz, preferably >20kHz, the received audio signal comprising a unique reception code, a timer for identifying a reception period of the unique reception code, and for timing at least one period of transmission of a unique transmission code, and optionally of an interval between transmission periods, a unique random transmission code generator, each unique transmission code comprising at least 50 bits, preferably at least 100 bits, more preferably at least 256 bits, the unique code comprising a lead-code for identifying the system, and for generating new unique codes at a set-rate, a memory for storing the unique transmission and reception codes, time of generation or reception of said unique codes, and at least one controller for instructing the memory to store a unique reception code, wherein the at least one controller is adapted to measure a length of a reception period of the reception of the unique reception code, to compare said length with a pre-set threshold length, to compare a signal strength of reception of said unique reception code with a pre-set threshold level of signal strength, and to discard said unique reception code if the length of the reception period thereof is less than the threshold length or if the signal strength is less than the
- 9 — pre-set level of signal strength, or to store said unique reception code otherwise.
2. System according to embodiment 1, comprising a transmitter for transmitting signals in the 2.4 - 5 GHz range, the transmitted radio signal comprising the unique transmission code, a receiver for receiving signals in the 2.4 — 5 GHz range, the received radio signal comprising the unique transmission code, and optionally at least one controller to provide the same unique code transmitted over radio and audio, wherein the at least one controller is adapted to compare a length of the radio signal, and to compare a signal strength of the audio signal.
3. System according to any of embodiments 1-2, wherein the length of the reception period is a combined length of 2-1000 reception periods, and/or wherein the length of the transmission period is a combined length of 2-1000 transmission periods.
4. System according to any of embodiments 1-3, wherein the distance between a location of a loudspeaker transmitting a unique transmission code and a microphone receiving said code is measured or calculated, and wherein said distance is stored with the unique transmission code.
5. System according to any of embodiments 1-4, wherein upon activation {for a given period of possible infection time, unique transmission codes transmitted during said possible infection time are transmitted to all mobile devices in the system.
6. System according to embodiment 5, wherein communication is through a publicly accessible medium, such as a website, through sending said unique transmission codes to mobile devices In the system, or a combination thereof.
7. System according to any of embodiments 5-6, wherein the controller is adapted to compare system wide communicated unique transmission codes with the unique reception codes stored on the device, and to generate a warning, such as a request to apply for a test, such as an infectious disease-test.
8. System according to any of embodiments 1-7, the
- 10 = mobile device comprising a switch for turning the system on or off and to set sensitivity, expiry date of data storage and data deletion.
9. System according to any of embodiments 1-8, wherein the mobile device is adapted to detect sneezing, or a position of a user thereof, or activity of a user thereof.
10. A computer program for proximity tracing comprising instructions loaded on at least one computer for carrying out the following steps: generating a unique transmission code at a set-rate, each unique transmission code comprising at least 50 bits, the unique code comprising a lead-code for identifying the system, transmitting an audio signal in the range of 215 kHz, preferably >20kHz, the transmitted audio signal comprising the unique transmission code, receiving an audio signal in the range of >15 kHz, preferably of >20kHz, the received audio signal comprising a unique reception code, optionally transmitting a radio signal in the range of 2.4 - 5 GHZ, the transmitted radio signal comprising the unique transmission code, optionally receiving a radio signal in the range of 2.4 - 5 GHz, the received radio signal comprising the unique reception code, identifying a reception period of unique reception codes, timing at least one period of transmission of the unique transmission codes, optionally timing of an interval between transmission periods, measuring the signal strengths of audio signal and optional radio signal of each unique reception of a code, storing the unique transmission and reception codes, and time of generation or reception of said unique codes, in a memory, measuring a length of a reception period of the reception of the unique reception code, and the signal strength of audio signal and optional radio signal of the unique reception code, comparing said length with a pre-set threshold length, comparing signal strength of reception of said unique reception code from audio signal and optional radio signal with a pre-set threshold level of signal strength, and
- 11 - discarding said unique reception code if the length of the reception period thereof is less than the threshold length or if the signal strength is less than the pre-set level of signal strength, or storing said unique reception code otherwise.
11. Mobile device comprising a computer program according to embodiment 10.

Claims (11)

- 12 — CONCLUSIES- 12 — CONCLUSIONS 1. Systeem voor het traceren van de nabijheid, omvattend een veelheid van mobiele apparaten, elk mobiel apparaat bestaat uit: een luidspreker voor het verzenden van een signaal in het bereik van >15kHz, bij voorkeur >20kHz, het uitgezonden audiosignaal bestaande uit een unieke transmissiecode, een microfoon voor het ontvangen van een signaal in het bereik wan >15kHz, bij voorkeur >20kHz, het ontvangen audiosignaal met een unieke ontvangstcode, een timer voor het identificeren van een ontvangstperiode van de unieke ontvangstcode, en voor het timen van ten minste één periode van verzending van een unieke transmissiecode, en optioneel van een interval tussen de transmissieperioden, een unieke generator van willekeurige transmissiecodes, waarbij elke unieke transmissiecode ten minste 50 bits omvat, bij voorkeur ten minste 100 bits, en meer nog, ten minste 256 bits, de unieke code die een leadcode omvat voor de identificatie van het systeem en voor het genereren van nieuwe unieke codes tegen een vaste snelheid, een geheugen voor het opslaan van de unieke zend- en ontvangstcodes, het tijdstip van de generatie of ontvangst van deze unieke codes, en ten minste één controller om het geheugen te instrueren een unieke ontvangstcode op te slaan, waarbij ten minste één controller is aangepast om een lengte van een ontvangstperiode van de ontvangst van de unieke ontvangstcode te meten, om deze lengte te vergelijken met een vooraf ingestelde drempellengte, een signaalsterkte van de ontvangst van deze unieke ontvangstcode te vergelijken met een vooraf ingestelde drempelwaarde voor de signaalsterkte, en deze unieke ontvangstcode weg te gooien als de lengte van de ontvangstperiode daarvan minder is dan de drempelwaarde of als de signaalsterkte minder is dan het vooraf ingestelde niveau van de signaalsterkte, of deze unieke ontvangstcode op een andere manier op te slaan.1. Proximity tracking system comprising a plurality of mobile devices, each mobile device consists of: a loudspeaker for transmitting a signal in the range >15kHz, preferably >20kHz, the broadcast audio signal consisting of a unique transmission code, a microphone for receiving a signal in the range of >15 kHz, preferably >20 kHz, the received audio signal having a unique reception code, a timer for identifying a period of reception of the unique reception code, and for timing at least one period of transmission of a unique transmission code, and optionally of an interval between transmission periods, a unique generator of random transmission codes, each unique transmission code comprising at least 50 bits, preferably at least 100 bits, and more preferably at least 256 bits , the unique code that includes a lead code for identifying the system and for generating new unique codes against n a fixed rate, a memory for storing the unique transmit and receive codes, the time of generation or reception of these unique codes, and at least one controller to instruct the memory to store a unique receive code, at least one controller is adapted to measure a length of a reception period of the reception of the unique reception code, to compare this length with a preset threshold length, to compare a signal strength of the reception of this unique reception code with a preset signal strength threshold , and discard this unique receive code if the length of its receive period is less than the threshold value or if the signal strength is less than the preset signal strength level, or store this unique receive code in some other way. 2. Systeem volgens conclusie 1, omvattend2. System according to claim 1, comprising: - 13 = een zender voor het uitzenden van signalen in het 2,4 - 5 GHz-bereik, het uitgezonden radiosignaal dat de unieke transmissiecode bevat, een ontvanger voor de ontvangst van signalen in het 2,4 - 5 GHz-bereik, het ontvangen radiosignaal met de unieke zendcode, en optioneel ten minste één regelaar om dezelfde unieke code te verstrekken die over radio en audio wordt verzonden, waarbij de ten minste één regelaar is aangepast om een lengte van de radiosignaal te vergelijken en om een signaalsterkte van het audiosignaal te vergelijken.- 13 = a transmitter for transmitting signals in the 2.4 - 5 GHz range, the transmitted radio signal containing the unique transmission code, a receiver for receiving signals in the 2.4 - 5 GHz range, receiving radio signal with the unique transmitting code, and optionally at least one controller to provide the same unique code transmitted over radio and audio, the at least one controller being adapted to compare a length of the radio signal and a signal strength of the audio signal to compare. 3. Systeem volgens een van conclusies 1-2, waarbij de lengte van de ontvangstperiode een gecombineerde lengte is van 2-1000 ontvangstperiodes, en/of waarin de lengte van de transmissieperiode een gecombineerde lengte is van 2-1000 transmissieperiodes.The system of any one of claims 1-2, wherein the length of the reception period is a combined length of 2-1000 reception periods, and/or wherein the length of the transmission period is a combined length of 2-1000 transmission periods. 4. Systeem volgens een van de conclusies 1-3, waarin de afstand tussen een locatie van een luidspreker die een unieke transmissiecode uitzendt en een microfoon die deze code ontvangt, wordt gemeten of berekend, en waarin deze afstand wordt opgeslagen met de unieke transmissiecode.A system according to any one of claims 1 to 3, wherein the distance between a location of a loudspeaker transmitting a unique transmission code and a microphone receiving this code is measured or calculated, and wherein this distance is stored with the unique transmission code. 5. Systeem volgens een van conclusies 1-4, waarin bij een handeling gedurende een bepaalde periode van mogelijke infectietijd, unieke transmissiecodes die tijdens deze mogelijke infectietijd worden verzonden naar alle mobiele apparaten in het systeem.A system according to any one of claims 1-4, wherein upon operation during a certain period of potential infection time, unique transmission codes transmitted during this potential infection time are sent to all mobile devices in the system. 6. Systeem volgens conclusie 5, waarbij de communicatie plaatsvindt via een voor het publiek toegankelijk medium, zoals een website, door middel van het verzenden van genoemde unieke transmissiecodes naar mobiele de-apparaten in het systeem, of een combinatie daarvan.The system of claim 5, wherein the communication takes place through a publicly accessible medium, such as a website, by sending said unique transmission codes to mobile devices in the system, or a combination thereof. 7. Systeem volgens een van de conclusies 5-6, waarbij de controller is aangepast om de systeembrede gecommuniceerde unieke transmissiecodes te vergelijken met de unieke ontvangstcodes die op het apparaat zijn opgeslagen, en om een waarschuwing te genereren, zoals een verzoek om een test aan te vragen, zoals een besmettelijke ziekte-test.The system of any one of claims 5-6, wherein the controller is adapted to compare the system-wide communicated unique transmission codes with the unique receive codes stored on the device and to generate a warning, such as a request for a test to such as an infectious disease test. 8. Systeem volgens een van de conclusies 1-7, het mobiele apparaat met een schakelaar voor het in- ofSystem according to any one of claims 1 to 7, the mobile device having a switch for enabling or - 14 — uitschakelen van het systeem en voor het instellen van de gevoeligheid, de vervaldatum van de gegevensopslag en het verwijderen van de gegevens.- 14 — system shutdown and for setting sensitivity, data storage expiration date and data deletion. 9. Systeem volgens een van conclusies 1-8, waarbij het mobiele apparaat is aangepast om niezen te detecteren, of een positie van een gebruiker daarvan, of een activiteit van een gebruiker daarvan.A system according to any one of claims 1-8, wherein the mobile device is adapted to detect sneezing, or a position of a user thereof, or an activity of a user thereof. 10. Een computerprogramma voor nabijheidstracering omvattend instructies die op ten minste één computer zijn geladen voor het uitvoeren van de volgende stappen: het genereren van een unieke transmissiecode tegen een vaste snelheid, waarbij elke unieke transmissiecode bestaat uit ten minste 50 bits, de unieke code bestaat uit een leadcode voor het identificeren van de systeen, die een audiosignaal in het bereik van >15 kHz, bij voorkeur >20kHz, uitzendt, het uitgezonden audiosignaal dat de unieke transmissiecode bevat, het ontvangen van een audiosignaal in het bereik van >15 kHz, bij voorkeur >20kHz, het ontvangen audiosignaal bestaande uit een unieke herontvangstcode, het optioneel uitzenden van een radiosignaal in het bereik van 2,4 — 5 GHZ, het uitgezonden radiosignaal dat bestaat uit de unieke transmissiecode, Optioneel kan een radiosignaal worden ontvangen in het bereik van 2,4 - 5 GHz, het ontvangen radiosignaal dat bestaat uit de unieke ontvangstcode, het identificeren van een ontvangstperiode met unieke ontvangstcodes, het tijdstip waarop ten minste één periode van toezending van de unieke transmissiecodes moet plaatsvinden, optioneel de timing van een interval tussen de transmissieperioden, het meten van de signaalsterkte van het audiosignaal en het optionele radiosignaal van elke unieke ontvangst van een code, het opslaan van de unieke zend- en ontvangstcodes, en het tijdstip waarop deze unieke codes worden gegenereerd of ontvangen, in een geheugen, het meten van de lengte van een ontvangstperiode van de ontvangst van de unieke ontvangstcode, en de signaalsterkteA proximity tracing computer program comprising instructions loaded on at least one computer for performing the following steps: generating a unique transmission code at a fixed rate, each unique transmission code consisting of at least 50 bits, the unique code consisting of from a lead code for identifying the system, which transmits an audio signal in the range of >15 kHz, preferably >20kHz, the broadcast audio signal containing the unique transmission code, receiving an audio signal in the range of >15 kHz, preferably >20kHz, the received audio signal consisting of a unique re-reception code, optionally transmitting a radio signal in the range of 2.4 — 5 GHZ, the transmitted radio signal consisting of the unique transmission code, Optionally, a radio signal can be received in the range of 2.4 - 5 GHz, the received radio signal consisting of the unique reception code, identifying an un reception period with unique reception codes, the time at which at least one period of transmission of the unique transmission codes must occur, optionally the timing of an interval between the transmission periods, measuring the signal strength of the audio signal and the optional radio signal of each unique reception of a code , storing the unique transmit and receive codes, and the time at which those unique codes are generated or received, in a memory, measuring the length of a receive period of receipt of the unique receive code, and the signal strength - 15 = van het audiosignaal en het optionele radiosignaal van de unieke ontvangstcode, door deze lengte te vergelijken met een vooraf ingestelde drempellengte, het vergelijken van de signaalsterkte van de ontvangst van de genoemde unieke ontvangstcode van het audiosignaal en het optionele radiosignaal met een vooraf ingestelde drempelwaarde voor de signaalsterkte, en deze unieke ontvangstcode weg te gooien als de lengte van de ontvangstperiode daarvan minder is dan de drempellengte of als de signaalsterkte minder is dan het vooraf ingestelde niveau van de signaalsterkte, of die anders een unieke ontvangstcode opslaat.- 15 = of the audio signal and the optional radio signal of the unique reception code, by comparing this length with a preset threshold length, comparing the signal strength of the reception of said unique reception code of the audio signal and the optional radio signal with a preset signal strength threshold, and discard this unique receive code if the length of its receive period is less than the threshold length or if the signal strength is less than the preset signal strength level, or otherwise stores a unique receive code. 11. Mobiel apparaat met een computerprogramma volgens conclusie 10.A mobile device with a computer program according to claim 10.
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US20120214416A1 (en) * 2011-02-23 2012-08-23 Jonathan Douglas Kent Methods and apparatuses for communication between devices
US20160294484A1 (en) * 2015-03-31 2016-10-06 Qualcomm Technologies International, Ltd. Embedding codes in an audio signal
US20180262277A1 (en) * 2017-03-07 2018-09-13 Ohio State Innovation Foundation Data delivery using acoustic transmissions

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Publication number Priority date Publication date Assignee Title
US20120214416A1 (en) * 2011-02-23 2012-08-23 Jonathan Douglas Kent Methods and apparatuses for communication between devices
US20160294484A1 (en) * 2015-03-31 2016-10-06 Qualcomm Technologies International, Ltd. Embedding codes in an audio signal
US20180262277A1 (en) * 2017-03-07 2018-09-13 Ohio State Innovation Foundation Data delivery using acoustic transmissions

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