CONTINUOUS GLUCOSE MONITOR COMMUNICATION WITH MULTIPLE DISPLAY DEVICES

• US 20160210099A1
• Filed: 01/20/2016
• Published: 07/21/2016
• Est. Priority Date: 01/21/2015
• Status: Active Grant

• Current Assignee: DexCom Incorporated
• Original Assignee: DexCom Incorporated
• Inventors: Hampapuram, Hari, Cohen, Eric, Smith, Brian Christopher, Hernandez-Rosas, Jose Hector, Pascual, Francis William, Mensinger, Michael Robert, Larvenz, Shawn
• Granted Patent: US 10,359,983 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/7445 Display arrangements, e.g. multiple display units
• CPC Class Codes: G06F 3/1423 controlling a plurality of local displays, e.g. CRT and flat panel display
• CPC Class Codes: G06F 3/1454 involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay
• CPC Class Codes: G09G 2358/00 Arrangements for display data security
• CPC Class Codes: G09G 2370/16 Use of wireless transmission of display information
• CPC Class Codes: G09G 2380/08 Biomedical applications
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

A continuous glucose monitor for wirelessly transmitting data relating to glucose value to a plurality of displays is disclosed, as well as systems and methods for limiting the number of display devices that can connect to a continuous glucose transmitter. In addition, security, including hashing techniques and a changing application key, can be used to provide secure communications between the continuous glucose transmitter and the displays. Also provided is a continuous glucose monitor and techniques for authenticating multiple displays, providing secure data transmissions to multiple displays, and coordinating the interaction of commands and data updates between multiple displays.

Claims

1. A method for pairing a transmitter of a continuous glucose monitoring system with a plurality of display devices, comprising:

connecting a first display device to the transmitter over a first wireless connection;

connecting a second display device to the transmitter over a second wireless connection;

limiting the number of display devices connected to the transmitter by rejecting additional connection requests during a communication interval; and

exchanging an application key with the first display device and the second display device periodically, the application key changing at the beginning of each period.

2. The method of claim 1, further comprising limiting the number of display devices connected to the transmitter to two display devices.

3. The method of claim 1, further comprising:

determining a device type for the first display device and the second display device; and

identifying whether the device type for the first display device and the second display device is an allowed device type; and

limiting the number of display devices connected to one of the device type of the first display device and one of the device type of the second display device.

4. The method of claim 3, wherein the step of limiting the number of display devices occurs during each of successive single communication intervals, the communication intervals occurring between low-power sleeping states of the transmitter.

5. The method of claim 1, wherein connecting the first display device and connecting the second display device further comprises:

exchanging a transmitter identifier between the transmitter and the first display device;

exchanging the transmitter identifier between the transmitter and the second display device;

comparing the transmitter identifier from the first display device and the transmitter identifier from the second display device with a stored transmitter identifier in the transmitter.

6. The method of claim 5, wherein the exchanged transmitter identifier comprises a hashed value.

7. A system for pairing a transmitter of a continuous glucose monitoring system with a plurality of display devices, comprising:

a first display device configured to connect with the transmitter over a first wireless connection;

a second display device configured to connect with the transmitter over a second wireless connection, wherein the transmitter is configured to;

limit the number of connected display devices by rejecting additional connection requests during a communication interval; and

exchange an application key with the first display device and the second display device periodically, the application key changing at the beginning of each period.

8. The system of claim 7, wherein the transmitter is further configured to limit the number of display devices connected to the transmitter to two display devices.

9. The system of claim 7, wherein the transmitter is further configured to:

determine a device type for the first display device and the second display device; and

identify whether the device type for the first display device and the second display device is an allowed device type; and

limit the number of display devices connected to one of the device type of the first display device and one of the device type of the second display device.

10. The system of claim 9, wherein limiting the number of display devices occurs during each of successive single communication intervals, the communication intervals occurring between low-power sleeping states of the transmitter.

11. The system of claim 7, wherein the transmitter is further configured to, while connecting the first display device and connecting the second display device:

exchange a transmitter identifier between the transmitter and the first display device;

exchange the transmitter identifier between the transmitter and the second display device;

compare the transmitter identifier from the first display device and the transmitter identifier from the second display device with a stored transmitter identifier in the transmitter.

12. The system of claim 11, wherein the exchanged transmitter identifier comprises a hashed value.

13. A computer-readable medium comprising instructions which, when executed by one or more processors, perform a method for pairing a transmitter of a continuous glucose monitoring system with a plurality of display devices, comprising:

connecting a first display device to the transmitter over a first wireless connection;

connecting a second display device to the transmitter over a second wireless connection;

limiting the number of display devices connected to the transmitter by rejecting additional connection requests during a communication interval; and

exchanging an application key with the first display device and the second display device periodically, the application key changing at the beginning of each period.

14. The computer-readable medium of claim 13, further comprising limiting the number of display devices connected to the transmitter to two display devices.

15. The computer-readable medium of claim 13, wherein the method further comprises:

determining a device type for the first display device and the second display device; and

identifying whether the device type for the first display device and the second display device is an allowed device type; and

limiting the number of display devices connected to one of the device type of the first display device and one of the device type of the second display device.

16. The computer-readable medium of claim 15, wherein the step of limiting the number of display devices occurs during each of successive single communication intervals, the communication intervals occurring between low-power sleeping states of the transmitter.

17. The computer-readable medium of claim 13, wherein connecting the first display device and connecting the second display device further comprises:

exchanging a transmitter identifier between the transmitter and the first display device;

exchanging the transmitter identifier between the transmitter and the second display device;

comparing the transmitter identifier from the first display device and the transmitter identifier from the second display device with a stored transmitter identifier in the transmitter.

18. The computer-readable medium of claim 17, wherein the exchanged transmitter identifier comprises a hashed value.