# US 9,439,029 B2 · Systems and methods for processing and transmitting sensor data

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- Number: US 9,439,029 B2
- Document ID: US9439029B2
- Status: Granted
- Kind: B2
- Application number: 14/341,140
- Filed: 2014-07-25
- Published: 2014-11-13
- Granted: 2016-09-06
- Earliest claimed: 2011-04-08
- Assignees: DexCom, Inc.
- Applicants: DexCom, Inc.
- Inventors: Kenneth San Vicente; Indrawati Gauba; Siddharth Waichal; Andrew Walker
- Web page: https://patentgrep.com/patent/US9439029B2

## CPC

- H04W 12/06: Authentication
- A61B 5/0004: {characterised by the type of physiological signal transmitted}
- A61B 5/002: {Monitoring the patient using a local or closed circuit, e.g. in a room or building (A61B5/0017 takes precedence)}
- A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement}
- A61B 5/1495: Calibrating or testing of in-vivo probes
- G16H 10/40: for data related to laboratory analysis, e.g. patient specimen analysis
- G16H 40/67: for remote operation
- H04B 7/26: at least one of which is mobile
- H04L 63/04: {for providing a confidential data exchange among entities communicating through data packet networks}
- H04L 63/06: {for supporting key management in a packet data network (cryptographic mechanisms or cryptographic arrangements for key management H04L9/08)}
- H04L 63/08: {for authentication of entities (cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32)}
- H04W 4/70: Services for machine-to-machine communication [M2M] or machine type communication [MTC]
- H04W 4/80: Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
- H04W 12/041: Key generation or derivation
- H04W 76/14: Direct-mode setup
- A61B 2560/0238: Means for recording calibration data
- A61B 2562/08: Sensors provided with means for identification, e.g. barcodes or memory chips
- Y02A 90/10: Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- 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)
- Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE

## Abstract

Systems and methods for continuous measurement of an analyte in a host are provided. The system generally includes a continuous analyte sensor configured to continuously measure a concentration of analyte in a host and a sensor electronics module physically connected to the continuous analyte sensor during sensor use, wherein the sensor electronics module is further configured to directly wirelessly communicate sensor information to one or more display devices. Establishment of communication between devices can involve using a unique identifier associated with the sensor electronics module to authenticate communication. Times tracked at the sensor electronics module and the display module can be at different resolutions, and the different resolutions can be translated to facilitate communication. In addition, the frequency of establishing communication channels between the sensor electronics module and the display devices can vary depending upon whether reference calibration information is being updated.

## Claims

### Claim 1

A method for wirelessly exchanging glucose information between a first communication device associated with a continuous glucose sensor and a second communication device associated with a glucose information display device, the method comprising:
exchanging information related to authentication between the first communication device and the second communication device; wherein the exchange of the authentication information includes determining by the second communication device whether a first device ID that is transmitted by the first communication device matches a second device ID that is stored at the second communication device;
opening a time window periodically for communication between the first communication device and the second communication device at a first rate; detecting an error at the first communication device;
upon the detection of the error, transmitting a request for reference information from the first communication device to the second communication device and opening the time window between the first communication device and the second communication device at a second rate, wherein the second rate is faster than the first rate;
receiving by the first communication device the reference information responsive to the request from the second communication device; and
resuming the opening of the time window at the first rate subsequent to the receipt of the reference information by the first communication device from the second communication device.

### Claim 2 (depends on 1)

The method of claim 1, wherein the detection of the error by the first communication device is based on analysis of sensor data indicating malfunction of the continuous glucose sensor.

### Claim 3 (depends on 1)

The method of claim 1, wherein the detection of the error by the first communication device is based on artifacts in sensor signal data.

### Claim 4 (depends on 1)

The method of claim 1, further comprising maintaining the opening of the time window at the second rate until expiration of a predetermined time.

### Claim 5

A system for wirelessly exchanging glucose information between devices, the system comprising:
a sensor electronics module operatively coupled to a continuous glucose sensor, the sensor electronics module configured to wirelessly transmit information related to authentication; and
a display device comprising a display electronics and a user interface, the user interface configured to receive user input and the display device configured to display glucose information, wherein the display electronics are configured to wirelessly receive the authentication information; wherein the receipt of the authentication information by the display device includes determination of whether a first device ID that is transmitted by the sensor electronics module matches a second device ID that is stored at the display device;
wherein the system synchronizes the sensor electronics module and the display device to open a time window periodically for communication between the sensor electronics module and the display device at a first rate; and
the sensor electronics module is configured to detect an error, and upon the detection of the error, transmit a request for reference information to the display device; and
wherein the system further synchronizes the sensor electronics module and the display device to open the time window between the sensor electronics module and the display device at a second rate, wherein the second rate is faster than the first rate;
wherein the sensor electronics module is further configured to receive the reference information responsive to the request from the display device; and
wherein the system is further configured to synchronize the sensor electronics module and the display device to resume the opening of the time window at the first rate subsequent to the receipt of the reference information by the sensor electronics module from the display device.

### Claim 6 (depends on 5)

The system of claim 5, wherein the detection of the error by the sensor electronics module is based on analysis of sensor data that indicates malfunction of the continuous glucose sensor.

### Claim 7 (depends on 5)

The system of claim 5, wherein the detection of the error by the sensor electronics module is based on artifacts in sensor signal data.

### Claim 8 (depends on 5)

The system of claim 5, wherein the system is further configured to maintain the opening of the time window at the second rate until expiration of a predetermined time.

### Claim 9

A system for wirelessly transmitting data between devices, the system comprising computer-readable instructions stored in computer memory, wherein the instructions, when executed by one or more processors of the system, cause the system to:
exchange information related to authentication between a first communication device and a second communication device; wherein the exchange of the authentication information includes determination whether a first device ID that is transmitted by the first communication device matches a second device ID that is stored at the second communication device;
open a time window periodically for communication between the first communication device and the second communication device at a first rate;
detect an error at the first communication device;
upon the detection of the error, transmit a request for reference information from the first communication device to the second communication device and open the time window between the first communication device and the second communication device at a second rate, wherein the second rate is faster than the first rate;
receive by the first communication device the reference information responsive to the request from the second communication device; and
resume the opening of the time window at the first rate subsequent the receipt of the reference information by the first communication device from the second communication device.

### Claim 10 (depends on 9)

The system of claim 9, wherein the first communication device is operatively connected to a continuous glucose sensor, and wherein the detection of the error by the first communication device is based on analysis of sensor data that indicates malfunction of the continuous glucose sensor.

### Claim 11 (depends on 9)

The system of claim 9, wherein the first communication device is operatively connected to a continuous glucose sensor, and wherein the detection of the error by the first communication device is based on artifacts in sensor signal data.

### Claim 12 (depends on 9)

The system of claim 9, wherein the instructions, when executed by the one or more processors of the system, further cause the system to maintain the opening of the time window at the second rate until expiration of a predetermined time.