Continuous glucose monitor communication with multiple display devices

• US 10,359,983 B2
• Filed: 01/20/2016
• Issued: 07/23/2019
• 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
• Primary Examiner(s): Khan, Atta
• Application Number:
  US15/001,756
• Publication Number:
  US 20160210099A1
• Time in Patent Office: 1,280 Days
• Field of Search: 709227
• 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 coupled to an analyte sensor of a continuous glucose monitoring system with a plurality of display devices, comprising:

requesting to connect a first display device to the transmitter coupled to the analyte sensor over a first wireless connection;

requesting to connect a second display device to the transmitter coupled to the analyte sensor over a second wireless connection;

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

initiating an authentication process by exchanging two or more keys with the first display device or the second display device periodically, wherein at least one of the two or more keys is generated based on identification information associated with the transmitter;

comparing the at least one of the two or more keys with a stored key in the transmitter, wherein the at least one of the two or more keys and the stored key comprise encrypted values;

changing another of the two or more keys, wherein the another key is an application key that is generated using a software application;

transmitting analyte values generated by the analyte sensor by the transmitter to the first display device upon authenticating the first display device or to the second display device upon authenticating the second display device; and

rejecting the request from the first or the second display device to connect to the transmitter when the stored key does not match with the at least one of the two or more keys.

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. A system for pairing a transmitter coupled to an analyte sensor of a continuous glucose monitoring system with a plurality of display devices, comprising:

a first display device configured to request to connect with the transmitter coupled to the analyte sensor over a first wireless connection;

a second display device configured to request to connect with the transmitter coupled to the analyte sensor over a second wireless connection, wherein the system is configured to;

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

initiate an authentication process by exchanging two or more keys with the first display device or the second display device periodically, wherein at least one of the two or more keys is generated based on identification information associated with the transmitter;

compare the at least one of the two or more keys with a stored key in the transmitter, wherein the at least one of the two or more keys and the stored key comprise encrypted values;

change another of the two or more keys wherein the another key is an application key that is generated using a software application;

transmit analyte values generated by the analyte sensor by the transmitter to the first display device upon authentication of the first display device or to the second display device upon authentication of the second display device; and

reject the request from the first or the second display device to connect to the transmitter when the stored key does not match with the at least one of the two or more keys.

6. The system of claim 5, wherein the transmitter is further configured to limit the number of display devices connected to the transmitter to two display devices.

7. The system of claim 5, 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.

8. The system of claim 7, 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.

9. A non-transitory computer-readable medium comprising instructions which, when executed by one or more processors, perform a method for pairing a transmitter coupled to an analyte sensor of a continuous glucose monitoring system with a plurality of display devices, comprising:

requesting to connect a first display device to the transmitter coupled to the analyte sensor over a first wireless connection;

requesting to connect a second display device to the transmitter coupled to the analyte sensor over a second wireless connection;

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

initiating an authentication process by exchanging two or more keys with the first display device or the second display device periodically, wherein at least one of the one or more keys is generated based on identification information associated with the transmitter;

changing another of the two or more keys at the beginning of each period, wherein the another key is an application key that is generated using a software application;

transmitting analyte values generated by the analyte sensor by the transmitter to the first display device upon authenticating the first display device or to the second display device upon authenticating the second display device; and

rejecting the request from the first or the second display device to connect to the transmitter when the stored key does not match with the at least one of the two or more keys.

10. The non-transitory computer-readable medium of claim 9, further comprising limiting the number of display devices connected to the transmitter to two display devices.

11. The non-transitory computer-readable medium of claim 9, 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.

12. The non-transitory computer-readable medium of claim 11, 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.