System and method for wireless communication of glucose data

• US 10,237,389 B2
• Filed: 07/17/2017
• Issued: 03/19/2019
• Est. Priority Date: 07/20/2016
• Status: Active Grant

• Current Assignee: DexCom Incorporated
• Original Assignee: DexCom Incorporated
• Inventors: Mandapaka, Aditya, Valdes, Jorge, Wedekind, Jeffrey R., Cohen, Eric, Burnette, Douglas William, Pascual, Francis William, Hampapuram, Hari, Dervaes, Mark, Mensinger, Michael Robert
• Primary Examiner(s): Huang, Wen W
• Application Number:
  US15/651,978
• Publication Number:
  US 20180027106A1
• Time in Patent Office: 610 Days
• Field of Search: 455 411, 455 412, 455 413
• CPC Class Codes: A61B 5/0004 characterised by the type of physiological signal transmitted
• CPC Class Codes: A61B 5/14503 invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors A61B5/1459, A61B5/1464, A61B5/1473, A61B5/1482, A61B5/14865 take precedence
• 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: G16H 10/60 for patient-specific data, e.g. for electronic patient records
• CPC Class Codes: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: G16H 40/63 for local operation
• CPC Class Codes: G16H 40/67 for remote operation
• CPC Class Codes: H04B 17/23 Indication means, e.g. displays, alarms, audible means
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 63/0869 for achieving mutual authentication cryptographic mechanisms or cryptographic arrangements for mutual authentication H04L9/3273
• CPC Class Codes: H04L 63/168 above the transport layer
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04M 1/72412 using two-way short-range wireless interfaces
• CPC Class Codes: H04Q 2209/40 using a wireless architecture
• CPC Class Codes: H04Q 2209/823 where the data is sent when the measured values exceed a threshold, e.g. sending an alarm
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
• CPC Class Codes: H04W 12/04 Key management, e.g. using generic bootstrapping architecture [GBA]
• CPC Class Codes: H04W 12/06 : Authentication
• CPC Class Codes: H04W 12/069 : using certificates or pre-shared keys
• CPC Class Codes: H04W 12/33 : using wearable devices, e.g. using a smartwatch or smart-glasses
• CPC Class Codes: H04W 4/38 : for collecting sensor information
• CPC Class Codes: H04W 4/80 : Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/542 : using measured or perceived quality
• CPC Class Codes: H04W 74/04 : Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 76/10 : Connection setup
• CPC Class Codes: H04W 76/25 : Maintenance of established connections
• CPC Class Codes: H04W 84/18 : Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Systems, devices, and methods are disclosed for wireless communication of analyte data. One such method includes, during a first interval, establishing a first connection between an analyte sensor system and a display device. During the first connection, the method includes exchanging information related to authentication between the analyte sensor system and the display device. The method includes making a determination regarding whether authentication was performed during the first interval. During a second interval, the method may include establishing a second connection between the analyte sensor system and the display device for transmission of an encrypted analyte value, and bypassing the exchanging of information related to authentication performed during the first connection. The method also includes, during the second interval, the analyte sensor system transmitting the encrypted analyte value to the display device, if the determination indicates that the authentication was performed during the first interval.

Claims

1. A method for connecting an analyte sensor system to an analyte display device and a second display device, the method comprising:

using an advertisement duration structure in attempt to pair the analyte sensor system with the analyte display device and the second display device;

wherein according to the advertisement duration structure, an advertisement duration comprises a first time segment and a second time segment;

wherein the first time segment is allocated to the second display device;

wherein the second time segment is allocated to the analyte display device; and

wherein the first time segment precedes the second time segment within the advertisement duration; and

reconfiguring the advertisement duration structure such that the second time segment precedes the first time segment.

2. The method of claim 1, wherein the first time segment is about 20 seconds long and the second time segment is about 2 seconds long.

3. The method of claim 1, wherein reconfiguring the advertisement duration structure comprises extending the first time segment to a span of time less than or equal to a remainder of the advertisement duration.

4. A method for connecting an analyte sensor system to an analyte display device and a second display device, the method comprising:

during a first time segment within an advertisement duration, transmitting a first set of advertisement messages to the second display device according to a first advertisement interval;

during a second time segment within the advertisement duration, transmitting a second set of advertisement messages to an analyte display device according to a second advertisement interval;

wherein one or more of the first advertisement interval, the second advertisement interval, a length of the first time segment, a length of the second time segment, the advertisement duration, and a sequence of the first and second time segments, is configurable.

5. The method of claim 4, wherein the first advertisement interval is configurable to be between about 20 milliseconds and about 90 milliseconds.

6. The method of claim 5, wherein the advertisement duration is configurable between about 2 seconds and about 90 seconds.

7. The method of claim 5, further comprising altering the sequence of the first and second time segments such that the second time segment precedes the first time segment.

8. The method of claim 5, further comprising altering the sequence of the first and second time segments based on a value that indicates whether or not the analyte sensor system has paired with the second display device.

9. The method of claim 5, further comprising:

obtaining an indication of a quality of a connection between the analyte sensor system and the analyte display device; and

modifying one or more of the length of the second time segment and the second advertisement interval, based on the indication of the quality.

10. The method of claim 9, wherein modifying one or more of the length of the second time segment and the second advertisement interval is done by the analyte sensor system responsive to a signal received from the analyte display device.

11. The method of claim 9, further comprising:

comparing the indication of the quality to a threshold;

wherein, if the indication of the quality exceeds the threshold, modifying one or more of the length of the second time segment and the second advertisement interval comprises one or more of;

decreasing the length of the second time segment; and

increasing the second advertisement interval; and

wherein, if the indication of the quality falls below the threshold, modifying one or more of the length of the second time segment and the second advertisement interval comprises one or more of;

increasing the length of the second time segment; and

decreasing the second advertisement interval.

12. The method of claim 9, wherein the quality has been determined using one or more of a received signal strength indication (RSSI) and a return trip delay time (RTDT).

13. The method of claim 9, further comprising:

performing a measurement of one or more of an RSSI and an RTDT; and

determining the quality based on the measurement.

14. The method of claim 13, wherein performing the measurement is done by one or more of the analyte sensor system and the analyte display device.

15. The method of claim 5, further comprising modifying one or more of the length of the first time segment, the first advertisement interval, the length of the second time segment, the second advertisement interval, and the sequence of the first and second time segments, based on an indication related to one or more of a location of the analyte sensor system and a location of the second display device.

16. The method of claim 5, further comprising modifying one or more of the length of the first time segment, the first advertisement interval, the length of the second time segment, the second advertisement interval, and the sequence of the first and second time segments, based on an indication related to a time of day.

17. The method of claim 5, further comprising:

generating an indication of a battery life for the analyte sensor system; and

modifying one or more of the length of the first time segment, the first advertisement interval, the length of the second time segment, the second advertisement interval, and the sequence of the first and second time segments, based on the indication of the battery life.

18. A system for the wireless communication of analyte data, the system comprising:

an analyte sensor system configured to transmit analyte sensor data and advertisement messages to one or more of a plurality of display devices during an advertisement duration;

a second display device of the plurality of display devices, wherein the second display device is configured to receive and respond to a first set of advertisement messages transmitted from the analyte sensor system during a first time segment within the advertisement duration;

an analyte display device of the plurality of display devices, wherein the analyte display device is configured to receive and respond to a second set of advertisement messages transmitted from the analyte sensor system during a second time segment within the advertisement duration, if a length of the second time segment has not been set to zero seconds;

wherein the second display device is further configured to receive a third set of advertisement messages during a third time segment of the advertisement duration, if a condition is satisfied.

19. The system of claim 18, wherein the condition is satisfied if the second display device did not connect to the analyte sensor system during the first time segment.

20. The system of claim 18, wherein one or more of the analyte sensor system, the second display device, and the analyte display device is further configured to obtain an indication regarding one or more connections made to the analyte sensor system and determine whether the condition satisfied, based on the indication.