# US 10,375,222 B2 · System and method for wireless communication of glucose data

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- Number: US 10,375,222 B2
- Document ID: US10375222B2
- Status: Granted
- Kind: B2
- Application number: 15/651,310
- Filed: 2017-07-17
- Published: 2018-01-25
- Granted: 2019-08-06
- Earliest claimed: 2016-07-20
- Assignees: DexCom, Inc.
- Applicants: DexCom, Inc.
- Inventors: Aditya Mandapaka; Jorge Valdes; Jeffrey R. Wedekind; Eric Cohen; Douglas William Burnette; Francis William Pascual; Hari Hampapuram; Mark Dervaes; Michael Robert Mensinger
- Web page: https://patentgrep.com/patent/US10375222B2

## CPC

- A61B 5/0004: {characterised by the type of physiological signal transmitted}
- 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)}
- A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement}
- A61B 5/742: {using visual displays (displays for heart-related electrical signals, e.g. ECG, A61B5/339)}
- G16H 40/63: for local operation
- G16H 40/67: for remote operation
- H04B 17/23: Indication means, e.g. displays, alarms, audible means
- H04B 17/318: Received signal strength
- H04L 63/0428: {wherein the data content is protected, e.g. by encrypting or encapsulating the payload}
- H04L 63/06: {for supporting key management in a packet data network (cryptographic mechanisms or cryptographic arrangements for key management H04L9/08)}
- H04L 63/0869: {for achieving mutual authentication (cryptographic mechanisms or cryptographic arrangements for mutual authentication H04L9/3273)}
- H04L 63/168: {above the transport layer}
- 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
- H04M 1/72412: using two-way short-range wireless interfaces
- H04W 4/38: for collecting sensor information
- H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
- H04W 12/04: Key management, e.g. using generic bootstrapping architecture [GBA]
- H04W 12/06: Authentication
- H04W 12/069: using certificates or pre-shared keys
- H04W 12/33: using wearable devices, e.g. using a smartwatch or smart-glasses
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 72/542: using measured or perceived quality
- H04W 74/04: Scheduled access (hybrid access H04W74/02)
- H04W 76/10: Connection setup
- H04W 76/25: Maintenance of established connections
- G16H 10/60: for patient-specific data, e.g. for electronic patient records
- G16H 20/17: delivered via infusion or injection
- 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
- H04Q 2209/40: using a wireless architecture
- H04Q 2209/823: where the data is sent when the measured values exceed a threshold, e.g. sending an alarm
- H04W 84/18: Self-organising networks, e.g. ad-hoc networks or sensor networks
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)

## 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

### Claim 1

A method for wireless communication of analyte data, the method comprising:
measuring analyte values in a host using a continuous analyte sensor of an analyte sensor system;
during a first interval, establishing a first connection between the analyte sensor system and a display device;
during the first connection, exchanging information related to authentication between the analyte sensor system and the display device;
performing a first determination regarding whether authentication was performed during the first interval;
during a second interval, the analyte sensor system transmitting an encrypted analyte value to the display device, when the first determination indicates that the authentication was performed during the first interval;
performing a second determination whether one or more alerts indicative of a medical condition of the host is to be triggered based on the measured analyte data;
triggering at least one alert and providing a notification on the display device when the second determination indicates that the at least one alert is to be triggered indicative of the medical condition of the host; and
neither initiating transmission of analyte values to the display device nor providing a notification on the display device when the first determination indicates that the authentication was not performed during the first interval.

### Claim 2 (depends on 1)

The method of claim 1, wherein the analyte sensor system is a continuous glucose sensor system and the information related to authentication comprises an application key.

### Claim 3 (depends on 2)

The method of claim 2, further comprising using the application key to encrypt an analyte value including a glucose value measured by the continuous analyte sensor and generate the encrypted analyte value including an encrypted glucose value.

### Claim 4 (depends on 3)

The method of claim 3, wherein characteristics of the application key are based on one or more of:
a type of data to be encrypted with the application key;
a network environment; and
user settings.

### Claim 5 (depends on 2)

The method of claim 2, further comprising modifying the application key responsive to one or more of:
the passage of a predetermined amount of time;
the analyte sensor system or the display device being restarted;
a trigger related to another device attempting to connect to the analyte sensor system; and
user input.

### Claim 6 (depends on 2)

The method of claim 2, wherein the application key was received by the display device from a server.

### Claim 7 (depends on 1)

The method of claim 1, further comprising, during the second interval:
establishing a second connection between the analyte sensor system and the display device for the transmitting of the encrypted analyte value by the analyte sensor system; and
bypassing the exchanging of information related to authentication performed during the first connection.

### Claim 8 (depends on 7)

The method of claim 7, wherein the information related to authentication comprises an application key used to generate the encrypted analyte value; and wherein using the application key to encrypt the analyte value and generate the encrypted analyte value allows bypassing, during the second interval, the exchanging of information related to authentication.

### Claim 9 (depends on 1)

The method of claim 1, wherein at least a portion of the encrypted analyte value is transmitted to the display device in one or more advertisement messages transmitted by the analyte sensor system.

### Claim 10 (depends on 9)

The method of claim 9, further comprising determining a number of advertisement messages to use for transmission of the encrypted analyte value.

### Claim 11 (depends on 10)

The method of claim 10, wherein if the number of advertisement messages to use for transmission of the encrypted analyte value is determined to be greater than 1, a first of the one or more advertisement messages comprises a first portion of the encrypted analyte value and an indication that a second of the one or more advertisement messages will comprise a second portion of the encrypted analyte value.

### Claim 12 (depends on 1)

The method of claim 1, wherein establishing the first connection and exchanging the information related to authentication are done using a first wireless protocol; and wherein transmitting the encrypted analyte value to the display device is done using a second wireless protocol different than the first wireless protocol.

### Claim 13 (depends on 12)

The method of claim 12, wherein using the first wireless protocol allows bypassing, during the second interval, the exchanging of information related to authentication.

### Claim 14

A method for wireless communication of analyte data, the method comprising:
measuring analyte values in a host using a continuous analyte sensor of an analyte sensor system;
during a first interval, using a first wireless protocol to perform an exchange of information related to authentication with a display device;
performing a determination whether one or more alerts indicative of a medical condition of the host is to be triggered based on the measured analyte data;
triggering at least one alert and providing a notification on the display device when the determination indicates that the at least one alert is to triggered indicative of the medical condition of the host;
during a second interval, bypassing the exchange of information related to authentication by using a second wireless protocol to transmit an encrypted analyte value to the display device, wherein the encrypted analyte value has been generated using the information related to authentication, and wherein the first wireless protocol is different than the second wireless protocol, and neither initiating transmission of analyte values to the display device nor providing a notification on the display device when the information related to authentication was not exchanged during the first interval.

### Claim 15 (depends on 14)

The method of claim 14, wherein the first wireless protocol is selected from the group consisting of: WiFi communication, Near Field Communication (NFC) and Bluetooth Low Energy (BLE) communication; and wherein the second wireless protocol is selected from a group consisting of: WiFi communication, NFC and BLE communication.

### Claim 16 (depends on 14)

The method of claim 14, wherein the analyte sensor system is a continuous glucose sensor system and the information related to authentication comprises an application key.

### Claim 17 (depends on 16)

The method of claim 16, further comprising the display device receiving the application key from a server.

### Claim 18

An analyte sensor system configured for wireless communication of analyte data, the analyte sensor system comprising:
a continuous analyte sensor configured to measure analyte values in a host;
a transceiver configured to transmit and receive wireless signals; and
a processor operatively coupled to the analyte sensor and the transceiver and configured to cause the analyte sensor system to:
during a first interval, establish a first connection between the analyte sensor system and a display device;
during the first connection, exchange information related to authentication between the analyte sensor system and the display device;
perform a first determination whether authentication was performed during the first interval;
perform a second determination whether one or more alerts indicative of a medical condition of the host is to be triggered based on the measured analyte data;
trigger at least one alert and provide a notification on the display device when the second determination indicates that the at least one alert is to triggered indicative of the medical condition of the host; and
during a second interval, transmit an encrypted analyte value to the display device, when the first determination indicates that the authentication was performed during the first interval, and neither initiate transmission of analyte values to the display device if nor provide a notification on the display device when the first determination indicates that the authentication was not performed during the first interval.

### Claim 19 (depends on 18)

The analyte sensor system of claim 18, wherein the processor is further configured to cause the analyte sensor system to:
during the second interval, establish a second connection between the analyte sensor system and the display device; and
during the second connection, bypass the exchange of the information related to authentication.

### Claim 20 (depends on 19)

The analyte sensor system of claim 19, wherein the analyte sensor system is a continuous glucose sensor system, and the information related to authentication comprises an application key, wherein the processor is further configured to cause the analyte sensor system to use the application key to encrypt an analyte value including a glucose value measured by the continuous analyte sensor to generate the encrypted analyte value including an encrypted glucose value, and wherein the use of the application key allows the analyte sensor system to bypass the exchange.