EP-4742635-A2 - SYSTEMS AND METHODS FOR ENHANCED WIRELESS COMMUNICATIONS BETWEEN ANALYTE SENSOR SYSTEMS AND DISPLAY DEVICES

EP4742635A2EP 4742635 A2EP4742635 A2EP 4742635A2EP-4742635-A2

Abstract

Techniques and protocols for enhancing wireless communications between an analyte sensor system and one or more other devices are described. Such techniques may include, for example, dynamic adjustment of transmission power when transmitting invitations, transmitting invitations with alternate (or different) payloads during different invitation periods, a reduction of handshake messages (e.g., client characteristic configuration descriptor (CCCD) messaging), etc. The various enhancements described herein may relate to various aspects of wireless communication protocols, including, for example, authentication, connection protocols, invitation message structure and content, device pairing, data transmission, etc.

Inventors

KANTETI, Satish Kumar
HU, JEFFERSON
JIMENEZ, Isamael V.

Assignees

Dexcom, Inc.

Dates

Publication Date: 20260513
Application Date: 20230711

Claims (15)

A method for wireless communication performed by an analyte sensor system, the method comprising: establishing a connection between a transmitter of the analyte sensor system and a display device; receiving at least a first packet from the display device after establishing the connection; determining a transmission power for a second packet, based at least in part on a current transmission power level of the transmitter and a signal strength of the first packet; and transmitting the second packet to the display device at the transmission power determined for the second packet.
The method of claim 1, further comprising: receiving at least a third packet from the display device after transmission of the second packet; determining a transmission power for a fourth packet, based at least in part on the current transmission power level of the transmitter and a signal strength of the third packet; and transmitting the fourth packet to the display device at the transmission power determined for the fourth packet.
The method of claim 1, wherein determining the transmission power comprises increasing the transmission power from a first transmission power level to a second transmission power level when the signal strength of the first packet is less than a threshold and the current transmission power level is equal to the first transmission power level.
The method of claim 1, wherein determining the transmission power comprises maintaining the transmission power at the current transmission power level when the signal strength is greater than or equal to a threshold.
The method of claim 1, wherein determining the transmission power comprises reducing the transmission power from a first transmission power level to a second transmission power level when the signal strength of the first packet is greater than a threshold and the current transmission power level is equal to the first transmission power level.
The method of claim 1, wherein determining the transmission power comprises maintaining the transmission power at the current transmission power level when the signal strength of the first packet is less than or equal to a threshold.
The method of claim 1, wherein establishing the connection comprises receiving a connection request from the display device in response to a generic invitation from the transmitter.
The method of claim 1, wherein establishing the connection comprises receiving a reconnection request from the display device in response to a targeted invitation from the transmitter.
An analyte sensor system configured to: establish a connection between a transmitter of the analyte sensor system and a display device; receive at least a first packet from the display device after establishing the connection; determine a transmission power for a second packet, based at least in part on a current transmission power level of the transmitter and a signal strength of the first packet; and transmit the second packet to the display device at the transmission power determined for the second packet.
The analyte sensor system of claim 9, wherein the analyte sensor system is further configured to: receive at least a third packet from the display device after transmission of the second packet; determine a transmission power for a fourth packet, based at least in part on the current transmission power level of the transmitter and a signal strength of the third packet; and transmit the fourth packet to the display device at the transmission power determined for the fourth packet.
The analyte sensor system of claim 9, wherein, in order to determine the transmission power, the analyte sensor system is configured to increase the transmission power from a first transmission power level to a second transmission power level when the signal strength of the first packet is less than a threshold and the current transmission power level is equal to the first transmission power level.
The analyte sensor system of claim 9, wherein, in order to determine the transmission power, the analyte sensor system is configured to maintain the transmission power at the current transmission power level when the signal strength is greater than or equal to a threshold.
The analyte sensor system of claim 9, wherein, in order to determine the transmission power, the analyte sensor system is configured to reduce the transmission power from a first transmission power level to a second transmission power level when the signal strength of the first packet is greater than a threshold and the current transmission power level is equal to the first transmission power level.
The analyte sensor system of claim 9, wherein, in order to determine the transmission power, the analyte sensor system is configured to maintain the transmission power at the current transmission power level when the signal strength of the first packet is less than or equal to a threshold.
The analyte sensor system of claim 9, where, in order to establish the connection, the analyte sensor system is configured to receive a connection request from the display device in response to a generic invitation from the transmitter, or receive a reconnection request from the display device in response to a targeted invitation from the transmitter.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims benefit of and priority to U.S. Provisional Application No. 63/368,631, filed July 15, 2022, which is assigned to the assignee hereof and hereby expressly incorporated by reference herein in its entirety as if fully set forth below and for all applicable purposes. INTRODUCTION FIELD The present application relates generally to medical devices such as analyte sensors and, more particularly, to systems, devices, and methods related to wireless communications between analyte sensor systems (e.g., continuous glucose monitoring (CGM) devices) and one or more display devices. DESCRIPTION OF THE RELATED TECHNOLOGY Diabetes is a metabolic condition relating to the production or use of insulin by the body. Insulin is a hormone that allows the body to use glucose for energy, or store glucose as fat. Diabetes mellitus is a disorder in which the pancreas cannot create sufficient insulin (Type I or insulin dependent) and/or in which insulin is not effective (Type 2 or non-insulin dependent). In the diabetic state, the victim suffers from high blood sugar, which causes an array of physiological derangements (kidney failure, skin ulcers, or bleeding into the vitreous of the eye) associated with the deterioration of small blood vessels. A hypoglycemic reaction (low blood sugar) may be induced by an inadvertent overdose of insulin, or after a normal dose of insulin or glucose-lowering agent accompanied by extraordinary exercise or insufficient food intake. Conventionally, a diabetic patient carries a self-monitoring blood glucose (SMBG) monitor, which may require uncomfortable finger pricking methods. Due to the lack of comfort and convenience, a diabetic will normally only measure his or her glucose level two to four times per day. Unfortunately, these time intervals are spread so far apart that the diabetic will likely be alerted to a hyperglycemic or hypoglycemic condition too late, sometimes incurring dangerous side effects as a result. In fact, it is unlikely that a diabetic will take a timely SMBG value, and further the diabetic will not know if his blood glucose value is going up (higher) or down (lower), due to limitations of conventional methods. Consequently, a variety of non-invasive, transdermal (e.g., transcutaneous) and/or implantable sensors are being developed for continuously detecting and/or quantifying blood glucose values. Generally, in a diabetes management system, a transmitter associated with the sensor wirelessly transmits raw or minimally processed data for subsequent display and/or analysis at one or more remote devices, which may include a remote device, a server, or any other types of communication devices. A remote device, such as a mobile device, may then utilize a trusted software application (e.g., approved and/or provided by the manufacturer of the sensor), which takes the raw or minimally processed data and provides the user with information about the user's blood glucose levels. Because diabetes management systems using such implantable sensors may provide more up-to-date information to users, they may reduce the risk of a user failing to regulate the user's blood glucose levels. Although existing wireless communications protocols and techniques for wireless communications between an implantable analyte sensor and a remote device may be acceptable, they also have certain shortcomings. Accordingly, there is a need for improvements to existing wireless communications protocols and techniques used for wireless communications between implantable analyte sensors and one or more remote devices. This background is provided to introduce a brief context for the summary and detailed description that follow. This background is not intended to be an aid in determining the scope of the claimed subject matter nor be viewed as limiting the claimed subject matter to implementations that solve any or all of the disadvantages or problems presented above. SUMMARY Certain embodiments provide a method for wireless communication performed by an analyte sensor system. The method includes transmitting one or more first advertising messages having a first payload size when a whitelist of previously authenticated devices has at least one unfilled entry. The method also includes transmitting one or more second advertising messages having a second payload size, smaller than the first payload size, when the whitelist lists at least one device. The method further includes establishing a communication session between the analyte sensor system and at least one device, based on at least one of the first advertising messages or the second advertising messages. Certain embodiments provide a method for wireless communication performed by an analyte sensor system. The method includes establishing a connection between a transmitter of the analyte sensor system and a display device. The method also includes receiving at least a first packet from the display device