Claims:We claim
1. A system for detection of the presence of contact tracing application comprising:
a computing unit 110, with a Bluetooth host 111 and a Bluetooth controller 112;
a personal device 120 with a contact tracing App 123, Bluetooth host 121 and a Bluetooth controller 122;
a local audio/visual alert device 113 and remote central monitoring unit 114;
wherein the computing unit 110 is configured to communicate with the personal device 121 by Bluetooth communication technology, to detect the presence of the contact tracing App 123 by comparing its App Id with a prestored contact tracing App Ids in the computing device 110.
2. The detection of the presence of contact tracing App 123 as claimed in Claim 1, is done by decoding the unique signature for App Id from Bluetooth advertising report of the HCI (Host controller interface) packet received from the contact tracing App 123 of the device 120.
3. The Local Audio/Visual indicator 113 as claimed in claim 1, of the system for detection of the presence of contact tracing Apps is a multicolored LED light for visual indication and Buzzer for audio alert, or more advanced multilingual, multicolor digital display and voice alert systems to indicate the presence or absence of the contact tracing App 123 in the personal device 120.
4. The central monitoring system 114 as claimed in claim 1, of the system for detection of the presence of contact tracing Apps, may be another audio/visual alarm like 113, or a computer system with HMI to monitor all the activities of the Computing unit 110, connected through wire or wireless communication.
5. A system for detection of the presence of contact tracing Apps comprising:
a computing unit 110, with a Bluetooth host 111 and a Bluetooth controller 112;
a personal device 120 with a contact tracing App 123, Bluetooth host 121 and a Bluetooth controller 122;
a local audio/visual alert device 113 and remote central monitoring unit 114;
wherein the computing unit 110 is configured to filter device 120, which is in the closest vicinity from the computing device 110 by value of RSSI (Received Signal strength indicator) of the Bluetooth advertising report received among the plurality of the personal devices which are in Bluetooth signal range from the computing unit 110.
6. A system for detection of the presence of contact tracing Apps is integrated with Automatic temperature detection system 200 comprising:
a temperature detection module 211; to detect the temperature of the human head 230, by temperature sensor 213;
a contact tracing App detection module 212 to detect the presence of the contact tracing App in the personal device 221 belongs to of the human 230;
a digital display module 214 to display the detected temperature of the human head 230 and a local Audio/visual alert device 214A to alert if the detected temperature is more than normal temperature;
a local audio/visual alert device 215 to alert the presence or absence of the contact tracing App in the device 221, and
a remote/central monitoring device to monitor the temperature detection module 211 and App detection module 212;
wherein the App detection module 212 is configured to detect the presence of the contact tracing App 221 within the threshold time to establish the Bluetooth communication with the device 221.
7. A method 300 for detecting the presence of the contact tracing App 123 in the personal device 120 by the computing unit 110, comprising the steps of:
a step 302 receiving the HCI packets from the plurality of contact tracing Apps 123 of devices 120 by the computing unit 110;
a step 303 decoding the HCI packets received in the step 302 by Bluetooth controller 112 of computing unit 110 for a Bluetooth advertising report with unique signature of the App 123;
a step 304, ensuring that the report is from the device, which is closest to the computing unit 110, by the RSSI value (Received Signal Strength Indicator) received in the advertisement reports received at the same time from plurality of the personal device 120;
a step 305, reading the contact tracing App Id from the report, received from App 123;
a step 306, comparing the received App Id with prestored contact tracing App Ids in the computing unit 110;
a step 307, where computing unit sending the alert message 308 if the App Id received matches with any of the prestored App Ids, indicating that the person is with an active contact tracing App in his personal device.
a step 308, where computing unit sending the alert message 309 if the App Id received does not matches with any of the prestored App Ids, indicating that the person does not have an active contact tracing App in his personal device.
a step 310, the computing unit transmitting the presence or absence of the contact tracing App to the remote monitoring center for further activities/action as required.
8. A method 400 for detection of the presence of contact tracing application in the personal device 221 by the contact tracing App detection module 212, which is integrated in the computing unit 210, along with temperature detection module 211 of the temperature detection system 200, comprising steps of:
a step 402, the temperature detection module 211 detecting the temperature of the human head 230 by temperature sensor 213, displaying at temperature display module 214, and alerting if the temperature detected is more than the predefined level at local audio/visual alert module 214A and updated to remote central monitoring system 216;
a step 403, on the failure of the contact tracing App detection module 212 attempt to establish Bluetooth communication with the contact tracing App 123 from the device 221, within the threshold time, step 404 activating the local audio/visual alert device 215 indicating the absence of the contact tracing App with the person 230;
A step 403, On success of establishing the communication within the threshold time, the rest of the sequence of steps for detection of the presence of contact tracing App follows as claimed in claim 7.
, Description:System and method for detection of the presence contact tracing application

Field of the Invention
The invention is related to system and method for detection of the presence of the active contact tracing application in the personal electronic devices like mobile phone, using Bluetooth communication and unique signature of the application, and alert and /or communicate to concerned people or system about the presence or absence of such an application.
Background of the invention
Infectious Pandemic diseases like Measles, HIV, COVID-19 are known to get transmitted from person to person through social contacts. It is very essential to understand the social contacts of the infected person to prevent the spread of the disease in the community. End of Pandemic diseases is not only possible by widespread tests, therapeutics, and vaccines, will depend also on a low-tech, tried-and-true tactic – contact tracing, isolating, and breaking the chain.
The recent pandemic disease COVID-19 by coronavirus, which spreads primarily through droplets has created an unprecedented need for contact tracing. Contact tracing is a critically important tool in pandemic response mitigation strategy. Public health officials are using this tactic to break the chain of transmission of infectious diseases to limit the spread of infections. The COVID-19 pandemic is posing an unprecedented challenge and requiring new and novel approaches to tackle it.
Even though contact tracing appears to be simple, identify, alert, isolate, test and treat all who have been in contact with an infected person and prevent them from spreading the disease to others. But it needs a specific, careful, tailored plan for each person and a dedicated team with investigative and communication skills to be effective.
Many governments and private organizations are developing mobile phone Apps as a part of toolkit strategy to identify recent contacts of the infected person by the exchange and collections of user Ids and App Ids over Bluetooth radio signals. Each phone with contact tracing App generates a random numerical ID that it broadcasts to nearby phones, which creates log records of all such Bluetooth “handshakes” when phones with such an App are closer together, within the Bluetooth communication range. These contacts will be alerted by notifications, if they have been close to an infected person, who experiences symptoms or tests positive for COVID 19 infection. Such Apps can complement an overall COVID-19 control strategy — including testing, contact tracing, isolation, and social distancing. Some countries are also starting to use phones to collect and record data, including names, addresses, gender, age, location, disease symptoms and COVID-19 test results etc.., using contact tracing Apps.
App-based contact tracing is appealing in part because the coronavirus’ spread is so stealthy and asymptomatic. Infected people can transmit the virus for days before they develop symptoms, and it can take several more days for investigators to learn about a case and confirm it with testing. These investigating teams then have left with very precious little time for traditional contact tracing, interviewing the infected person, tracking down all the recent contacts they can recall, and getting those people to self-isolate before they, too, pass on the virus to others.
An App can only catch interactions between people who have installed it in their personal mobile and carry with them all the time. So public buy-in is key to success for n App based strategy. For example, India’s contact tracing App “Aarogya Setu” developed by Govt. of India has been installed by around 140 million people at the time of drafting this application, which is roughly about 10% of total population of India. It means that in any encounter between two randomly chosen people, there is only a 1% chance that both will have the App. This points to one of the deepest disadvantages in mobile App or digital contact-tracing plans anywhere. It is extremely critical to ensure that all the people who have these App installed and keep active all the time. Specially those people who are exposing to public places like, offices, markets, malls, public transport system, any such public gatherings, where the chances of infection transmission are very likely from unknown contacts either from person to person or from objects to persons. So, it is extremely critical to ensure that all such people have their mobile phones installed with contact tracing Apps to access the public places.
So there is a critical and urgent need for a technology which can detect the active and working contact tracing Apps in the individual mobile phones installed. The present invention is one such technology, which will detect the presence or absences of such an Apps and alerts the concerned authorities. Which helps to prevent the people without contact tracing App to access the public places.

Object of the invention
The number of Covid-19 pandemic disease infected people are increasing to an alarming level in many countries, stretching the healthcare facilities of the countries beyond their capability to treat all the infected people. Countries declared the lockdowns or enforced restriction on normal life to reduce the movement of people to restrict the spread of the pandemic. Among many strategies and tools deployed, contact tracing App is one of the important tool to identify and alert the people who are interacted with the infected person to quarantine them for further spread of the pandemic, and also to test and treat them if they are infected. Governments started ease of the lockdown restrictions to bring back normal life as well as restarting functioning of commercial businesses, and industrial establishments, despite continued spread of infections. They also made it mandatory to check for pandemic symptoms like temperature, sanitization for hygiene and contact tracing App in personal electronic devices for all the people who need to access the public places like, offices, markets, Malls, commercial establishments, factories, parks, entertainment facilities etc., Ensuring the presence of the active contact tracing App is a difficult task, as it not possible to verify the personal electronic device or mobile phone on every movement as it needs skilled and dedicated manpower, and time consuming unlike the temperature testing and sanitization. So, there is a critical need to automatically verify the presence of contact tracing App before permitting the individual to access the public place.
The principle object of the present invention is to disclose a system and method to detect the presence of the active contact tracing App in mobile or personal digital device.
Another object of the present invention is to disclose detection of the presence of the active contact tracing App by identification and decoding of the contact tracing App Id of the region, country or the organization using Bluetooth communication technology.
Further object of the present invention is to disclose to choose the device for detection of contact tracing App in a device which is closest to App detection system, to avoid the mistaken identity, based on BLE RSSI (Received Signal Strength Indicator) value to filter out the presence of multiple devices within the Bluetooth signal range.
Further object of the invention is to disclose the App detection system which can be used as a standalone system, as a stationary or mobile hand held device or integrate with any other equipment’s including but not limited to temperature sensor, metal detectors, thermal image scanner etc.,

Summary of the invention
The main aspect of the present invention is for detection of the presence of the contact tracing App in a personal electronic device like mobile phone By Bluetooth communication technology and the unique signature of the contact tracing application.
The system reads the Bluetooth advertisement report from the devices which are in the Bluetooth signal range, for detection of the presence of a contact tracing App from its unique signature. The unique signature may be a combination of user Id and App Id.
In another aspect of the invention, the system filters and identifies the nearest device among plurality of devices within the Bluetooth signal range by the strength of the RSSI (Received Signal Strength Indicator) value received in the advertisement report, making an inference of the distance of the personal device from the system. Further system decodes the contact tracing App Id, compares with the various App Ids of the region, country or organizations, prestored in the system, and alerts the presence or absence of the contact tracing App by local audio/visual indications, as well as report to central/remote monitoring center.
In another aspect of the present invention is, the system can be integrated in any other system which is used for scanning or security purposes, like automatic head temperature/fever recording system, metal detectors frames and hand held devices, thermal scanning machines, in addition to use as an independent device.
Other features, aspects and advantages of the present invention will be apparent from the following description, appended claims taken in conjunction with the accompanying drawings.

Brief description of the drawings
Figure. 1 is a block diagrams illustrating of the system for detection of the presence contact tracing application.
Figure. 2 is a block diagrams illustrating of the system for detection of the presence contact tracing application, integrated with automatic temperature detection system.
Figure. 3 is a flow chart illustrating the sequence of steps for detection of the presence of contact tracing application.
Figure. 4 is a flow chart illustrating the sequence of steps for detection of the presence of contact tracing application in conjunction with automatic temperature detection system.
While the invention is described in conjunction with the preferred embodiments given as a way of mere examples. It is to be understood that they are not intended to limit the scope of the present invention to such embodiments. On the contrary, it is intended to cover all possible alternatives, modifications, and/or technical equivalents, with the present invention could be used and may be useful as apparent to a person skilled in the art.

Detailed description:
It shall be observed that systems, components, and methods described in accordance with exemplary embodiments have been represented by known symbols in the figures, showing only specific details that are relevant for an understanding of the present disclosure. Further, details that are readily apparent to those skilled in the art may not have been disclosed.
Referring to Fig. 1, system 100 for detection of the contact tracing application(Apps) is disclosed. System 100 comprises the computing unit 110, local audio/visual alert device 113 and remote or central monitoring system 114, and plurality of personal mobile devices 120. The computing unit 110 further comprises a Bluetooth host 111, to interface between the Bluetooth controller 112 and the computing unit 110, and a Bluetooth controller 112, to control the Bluetooth communication with other devices such as personal device 120. The Bluetooth controller 112 may be an independent hardware from the Computing unit 110 or may be an integral part computing unit. Bluetooth host 11 is generally part of the computing unit.
The local audio/visual alert device 113, may be provided with a simple multicolored LED light for visual indication, (example, red light for absence and green light for presence of the App) and Buzzer for audio alert, or may be more advanced multilingual, multicolor digital display and voice alert systems, to indicate the presence or absence of the contact tracing App in the personal device 120. The central monitoring system 114, may be another audio/visual alarm like 113, or may be a computer with HMI to monitor all the activities of the Computing unit 110, connected through wire or wireless communication.
The personal device 120, may be a smart mobile phone or any other digital mobile device, having a capability to install the various types of the contact tracing Apps 123. The personal device 120 is further capable of Bluetooth communication capability with Bluetooth host 121 and Bluetooth controller 122.
Plurality of contact tracing Apps 123 are being developed and deployed all over the world by government and business organisation to tackle fast spreading Covid-19 pandemic at national level and at the organisational levels to track the movement of people, and store the user detail and their encounters with other personal devices/people. The contact tracing Apps are designed to share the unique signature (User Id and App Id) of individuals and their personal devices, through Bluetooth advertising report using Bluetooth broadcast communication technology, whenever these devices say first and second personal devices come across, within the Bluetooth communication range. The first personal device 120 decodes the advertising reports received from second personal device contact tracing App for unique App Id and the user Id of the second personal device. If the report is containing App Id and/or User Id, then the first personal device uploads the information from the second device to the designated cloud storage which is accessible concerned authorities. Similarly, the second device decodes and uploads the User Id and App Id of the first personal device to the cloud storage. When someone tests positive for the Pandemic, the concerned authorities review the user Ids from the cloud storage, that a positive patient encountered with the personal devices in the recent past. This enables to send the alert messages to all the contacts in the list to initiate the mitigation activities to restrict further spread of pandemic.
Generally, the Bluetooth advertisement reports are of the format as described in the core specification Vol 4, Part E Section 7.7.65.2. The signature (User Id and App Id) of most of the Contact tracing Apps are part of Generic Access Profile (GAP). The Local device or User id is a GAP. This is specific to the user. The App Id is also a GAP with 16/128 UUID (Universally unique identifier). The summary is that User Id and the App Id are part of the advertisement report that are broadcasted by the contact tracing Apps.
For the success of contact tracing Apps strategy, it is extremely critical to ensure that all the people have installed App and keep active all the time. The main objective of this invention is to detect and alert the concerned authorities, the presence of the working App in the personal device of an individual before allowing the people to access the public places. Normally all the public places are mandated to check the most common Pandemic symptoms like fever, and facility for sanitization before allowing to enter the public places, in addition to use of masks. The persons having pandemic symptoms like fever, are not allowed to enter. However, the problem is the identification people who are asymptomatic. These people can be allowed to access the public places only if they have a personal device with active contact tracing App. So is the need of the system for the detection of contact tracing Apps, which is extremely critical for tracking asymptomatic people.
In one of the embodiments, the system for detecting the presence of the contact tracing App is incorporated in the automatic temperature detection system 200, as shown in Fig 2. The temperature detection system 200, comprises computing unit 210, having the temperature detection module 211 and Contact tracing App detection module 212, integrated together. A temperature sensor 213, with a built in proximity sensor (not shown fig) which measures the head temperature of the human 230, whenever head (not shown in fig) of 230 is close to the temperature sensor range, which is determined by the proximity sensors. The measured temperature value is displayed at Temperature display module 214, with an audio/visual alert 214A if the measured temperature is more than normal. The temperature detection module 211 is configured to receive the measured temperature from sensor 213, display the measured value at display 214, and audio/visual alert 214A if the temperature is more than the prescribed limit and also to store and upload to remote/central monitoring system 216.
The integrated contact tracing App module 212 of the computing unit 210, works as explained with Fig 1 above, along with local audio/visual unit 215, remote/central monitoring unit 216, personal device 221, which belongs to and carried along with the human 230.
In another embodiments, the system 100 for checking the presence of the contact tracing App can also be incorporated including but not limited to metal detector frame, hand held security devices, door frames, ticket vending machines, body sanitizing ducts, thermal scanning equipment’s, etc., at the entrance of the building or railway stations, metro stations, bus station, airports and so on.
Referring to Fig 3, represents the method 300 of detecting the presence of contact tracing App is disclosed.
At step 302 the Bluetooth controller 112 of the computing unit 110 receives the Bluetooth advertising report or HCI Packets from the plurality of contact tracing Apps 123 of the plurality of personal devices 120, through their Bluetooth controller 122, when the computing unit 110 and Personal device 120 are within the Bluetooth communication range.
At Step 303, the Bluetooth controller 112 of computing unit 110 decodes HCI packet for advertising report. On finding the advertising report, at step 304, the computing unit ensure that the report is from the device, which is closest to the computing unit 110, by the RSSI value (Received Signal Strength Indicator) received in the advertisement report, Provided there are more than one advertising reports at the same time from plurality of the personal devices 120.
In one embodiment of the invention RSSI values of -30 to -50 indicate that the personal device 120 is within 2 feet distance from the computing device 110.
At step 305, the computing unit 110 reads the contact tracing App Id from the report, compares received App Id of the personal device with the prestored variety of contact tracing App Ids in the computing unit at step 306.
At step 307, the computing unit sends the alert message 308, if the App Id received matches with any of the prestored App Ids, indicating the person is with an active contact tracing App in his personal device. If the App Id received does not matches with any of the prestored App Ids, computing unit 110 sends the message 309, indicating that person does not have active contact tracing App in his person device.
At step 310, the computing unit transmits the presence or absence of the contact tracing App to the remote monitoring center for further activities/action as required.
Referring to Fig 4, represents the method 400 of detecting the presence of contact tracing App, integrated with automatic temperature detection method is disclosed.
At Step 402, the temperature detection module 211 records temperature of the human 230 as read by temperature sensor 213, measured value displayed at display module 214, and alerts if the temperature is record is more than the predefined level at local audio/visual alert module 214A and updates to remote central monitoring system 216
At step 403, the contact tracing App detection module 212 attempt to establish Bluetooth communication with the contact tracing App from the device 221 of the human 230, who is in proximity with system 300 to record the temperature. If the App detection module 212 not able to establish communication with device 221, within the threshold time, the local audio/visual alert 215, activated to indicate the absence of the contact tracing App with the person 230. The reason may be absence of the device 221 itself or contact tracing App not installed in the device or Contact tracing APP not activated, or Bluetooth communication is disabled etc.,. The threshold time to establish the Bluetooth communication with the device is depends on the frequency at which devices emits the App signature, typically it is around 10 seconds, to be set as required on practical conditions.
On establishing the communication within the threshold time, the rest of the sequence of steps for detection of the presence of contact tracing App will follow as explained referring to Fig 3. above.

It will be appreciated by those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restricted. The scope of the invention is indicated by the appended claims rather than the foregoing description and all changes that come within the meaning and range and equivalence thereof are intended to be embraced therein.