Implantable Device Advertising Schedule Management
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Solution Overview
Problem
Current methods for managing advertising and scanning schedules between implantable medical devices (IMDs) and external instruments (EIs) lead to high battery drain due to inefficient communication link establishment, particularly in smaller devices with limited battery space.
Innovation Solution
Implementing a method that stores and transmits advertisement notices unevenly and at unequal intervals, as defined by an advertising schedule, to improve connectivity and reduce battery drain. This method also involves reconfiguring scanning schedules to optimize scanning windows and intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If advertisement notices are transmitted at a lower frequency to conserve current drain, then battery life is extended, but connection establishment time increases and connectivity reliability deteriorates
Solution Approach 1:
The patent implements dynamic advertising frequency adjustment where the IMD transitions between different advertising states (first state with lower frequency for energy conservation, second state with higher frequency for improved connectivity). The system dynamically switches between these states based on connection establishment needs, allowing it to adapt its energy consumption and connectivity performance in real-time rather than operating at a fixed frequency.
Solution Approach 2:
The patent employs periodic advertising cycles where advertisement notices are transmitted at regular intervals within each advertising state. The system uses periodic transitions between advertising states, alternating between lower-frequency periods (for energy conservation) and higher-frequency periods (for connection establishment), creating a rhythmic pattern that balances energy usage and connectivity reliability.
2Use of energy by moving object
If advertisement notices are transmitted at a lower frequency to conserve current drain, then battery life is extended, but connection establishment speed decreases
Solution Approach 1:
The system dynamically adjusts advertising frequency by switching between different advertising states. When connection establishment is needed, the system transitions to a second advertising state with higher frequency for faster connection speed. When connection is established or not needed, it switches to a first advertising state with lower frequency to conserve energy, thus dynamically optimizing both speed and energy consumption.
Solution Approach 2:
The patent changes the advertising frequency parameter based on operational needs. By modifying the advertising interval parameter between different states (longer intervals in first state, shorter intervals in second state), the system adjusts connection establishment speed while controlling energy consumption, demonstrating parameter-based optimization of the contradiction between speed and energy usage.
3Reliability
If scanning windows are increased in frequency to improve connection reliability, then connectivity is enhanced, but external instrument battery drain increases
Solution Approach 1:
The patent implements dynamic coordination between IMD advertising states and EI scanning windows. The EI adjusts its scanning window frequency dynamically based on the advertising state of the IMD, increasing scanning frequency when the IMD is in the second advertising state (higher advertising frequency) and reducing scanning frequency when the IMD is in the first advertising state (lower advertising frequency), thus optimizing both connectivity and energy consumption for the external instrument.
Solution Approach 2:
The system employs feedback mechanisms where the EI monitors the advertising notices received from the IMD and adjusts its scanning window frequency accordingly. When advertisement notices are received successfully, the EI can reduce scanning frequency to conserve battery. When connection establishment is needed or advertising notices are missed, the EI increases scanning frequency, creating a feedback-based optimization of connectivity and energy usage.
Data Source
AI summary
Methods and devices for managing establishment of a communications link between an external instrument (EI) and an implantable medical device (IMD) are provided. A method performed by the EI includes scanning one or more channels for an advertisement notice transmitted by the IMD in accordance with a scanning schedule, wherein the scanning schedule defines a temporal pattern of scanning windows that are separated by one or more scanning intervals. The method also includes changing the scanning schedule, in response to a duration of the scanning the one or more channels exceeding a predetermined threshold without a valid advertisement notice being received by the EI from the IMD, and scanning the one or more channels for the advertisement notice in accordance with the scanning schedule as changed, wherein the scanning schedule as changed defines a different temporal pattern of scanning windows that are separated by one or more scanning intervals.