Method of communicating between a client-server system and remote clients

Patent metadata

Field	Value
Publication number	US-11030869-B2
Application number	US-202016807068-A
Country	US
Kind code	B2
Filing date	Mar 2, 2020
Priority date	Mar 4, 2019
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A method of selectively broadcasting a message to a client by a server without knowing the client's internet protocol (IP) address includes receiving video feeds of an area of interest from one or more cameras, performing target recognition and tracking on one or more targets, including position of the one or more targets, extracting target-specific context parameters from the one or more recognized and tracked targets, encoding the target-specific context parameters into a header, thereby generating a context address for the one or more targets, appending the context address to a message for the one or more targets from a predetermined set of messages based on the position of the one or more targets, thereby generating one or more packets of information, and broadcasting the one or more packets wirelessly to one or more client mobile devices each associated with the one or more targets.

First claim

The invention claimed is:

1. A client-server system adapted to broadcast selective messages to one or more clients without knowing the internet protocol address of the clients, comprising:
a server having a server processor adapted to execute a computer-readable program encoded on a non-transitory computer-readable medium;
one or more cameras in communication with the server each adapted to provide a video feed of an area of interest;
one or more client mobile devices each hosted by a corresponding user (target), each of the one or more client mobile devices adapted to receive broadcasted signals form the server, wherein the server processor is configured to:
receive video feeds from the one or more cameras;
perform target recognition and tracking on the one or more targets, including position of the one or more targets;
extract target-specific context parameters from the one or more recognized and tracked targets;
encode the target-specific context parameters into a header, thereby generate a context address for the one or more targets;
append the context address to a message for the one or more targets from a predetermined set of messages based on the position of the one or more targets, thereby generate one or more packets of information; and
broadcast the one or more packets wirelessly to the one or more client mobile devices.

2. The client-server system of claim 1 , wherein the target-specific context parameters include an identifier as to whether the one or more target is moving.

3. The client-server system of claim 1 , wherein the target-specific context parameters include an identifier as to the velocity of the one or more targets.

4. The client-server system of claim 1 , wherein the target-specific context parameters include an identifier as to degree of rotation of the one or more targets.

5. The client-server system of claim 1 , wherein the server processor is configured to establish one or more ambiance maps of the area of interest based on one or more ambiance context parameters.

6. The client-server system of claim 5 , wherein the one or more ambiance maps include a map of magnetic trends in the area of interest based on subdividing the area of interest into a plurality of smaller subdivided areas.

7. The client-server system of claim 6 , wherein the server processor is configured to add the magnetic trend obtained from the magnetic trend map based on the position of the one or more targets to the header.

8. The client-server system of claim 7 , wherein the one or more ambiance maps include a map of WI-FI signal strength (WI-FI fingerprint) in the area of interest based on subdividing the area of interest into a plurality of smaller subdivided areas.

9. The client-server system of claim 8 , wherein the server processor is configured to add the WI-FI fingerprint obtained from the magnetic trend map based on the position of the one or more targets to the header.

10. The client-server system of claim 9 , wherein the one or more client mobile devices configured to i) receive the message, ii) extract the header; iii) decode the header into target-specific context parameters and ambiance context parameters; iv) compare values of the target-specific context parameters and ambiance context parameters with onboard sensor reading; v) assign a score based on the comparison; vi) compare the assigned score to a predetermined threshold; and vii) if the assigned score is above the predetermined threshold indicating the broadcasted message is intended for the one or more targets, then display the associated message on an associated screen of the associated client mobile device.

11. A method of selectively broadcasting a message to a client by a server without knowing the client's internet protocol (IP) address, comprising:
receiving video feeds of an area of interest from one or more cameras in communication with a server;
performing target recognition and tracking on one or more targets in the area of interest, including position of the one or more targets;
extracting target-specific context parameters from the one or more recognized and tracked targets;
encoding the target-specific context parameters into a header, thereby generating a context address for the one or more targets;
appending the context address to a message for the one or more targets from a predetermined set of messages based on the position of the one or more targets, thereby generating one or more packets of information; and
broadcasting the one or more packets wirelessly to one or more client mobile devices each associated with the one or more targets.

12. The method claim 11 , wherein the target-specific context parameters include an identifier as to whether the one or more target is moving.

13. The method of claim 11 , wherein the target-specific context parameters include an identifier as to the velocity of the one or more targets.

14. The method of claim 11 , wherein the target-specific context parameters include an identifier as to degree of rotation of the one or more targets.

15. The method of claim 11 , further comprising:
establishing one or more ambiance maps of the area of interest based on one or more ambiance context parameters.

16. The method of claim 15 , wherein the one or more ambiance maps include a map of magnetic trends in the area of interest based on subdividing the area of interest into a plurality of smaller subdivided areas.

17. The method of claim 16 , further comprising:
adding the magnetic trend obtained from the magnetic trend map based on the position of the one or more targets to the header.

18. The method of claim 17 , wherein the one or more ambiance maps include a map of WI-FI signal strength (WI-FI fingerprint) in the area of interest based on subdividing the area of interest into a plurality of smaller subdivided areas.

19. The method of claim 18 , further comprising:
adding the WI-FI fingerprint obtained from the magnetic trend map based on the position of the one or more targets to the header.

20. The method of claim 19 , further comprising:
the one or more client mobile devices receiving the message;
the one or more client mobile devices extracting the header;
the one or more client mobile devices decoding the header into target-specific context parameters and ambiance context parameters;
the one or more client mobile devices comparing values of the target-specific context parameters and ambiance context parameters with onboard sensor reading;
the one or more client mobile devices assigning a score based on the comparison;
the one or more client mobile devices comparing the assigned score to a predetermined threshold; and
if the assigned score is above the predetermined threshold the one or more client mobile devices indicating the broadcasted message is intended for the one or more targets, then displaying the associated message on an associated screen of the associated client mobile device.

Assignees

• Purdue Research Foundation

Inventors

• Wang He
• Cao Siyuan
• Farrukh Habiba

Classifications

• G06V20/52 Primary

  Surveillance or monitoring of activities, e.g. for recognising suspicious objects (recognising microscopic objects G06V20/69) · CPC title

• G08B13/19645 Primary

  Multiple cameras, each having view on one of a plurality of scenes, e.g. multiple cameras for multi-room surveillance or for tracking an object by view hand-over · CPC title

• G06V10/25

  Determination of region of interest [ROI] or a volume of interest [VOI] · CPC title

• H04L65/613

  for the control of the source by the destination (control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637) · CPC title

• H04L65/611

  for multicast or broadcast (systems for broadcast or conference H04L12/18; arrangements for broadcast or distribution combined with broadcast H04H20/00; arrangements for broadcast applications with a direct linkage to broadcast information or to broadcast space-time H04H60/00; selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS], H04W4/06) · CPC title