Leadless Dual-Chamber IMD Receiver Wakeup Control
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Solution Overview
Problem
Implantable medical devices (IMDs) face challenges in reducing power consumption, particularly in communication processes, which affects their longevity due to frequent wake-ups of receivers, leading to excessive battery drain.
Innovation Solution
The implementation of a method that selectively adjusts the wake-up frequency of the second receiver based on the validity and noise levels of received messages, allowing the device to switch between normal and noise states to conserve power, with the first receiver waking up the second only when necessary and putting both to sleep during idle periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second receiver is frequently woken up to examine received messages, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic state transitions between normal mode and noise state based on received signal characteristics. The system adapts its wake-up frequency and receiver activation behavior according to the detected noise level, transitioning from frequent wake-ups in normal conditions to reduced wake-ups in noise conditions, thereby optimizing the trade-off between communication reliability and power consumption
Solution Approach 2:
The system changes operational parameters including wake-up frequency, receiver activation state, and message examination frequency based on the detected noise level. In noise state, the system modifies these parameters to reduce power consumption while maintaining adequate communication functionality, directly addressing the contradiction between reliability and energy use
2Measurement precision
If the receiver remains awake continuously to receive messages, then message reception accuracy is improved, but battery life decreases
Solution Approach 1:
The system employs periodic wake-up cycles instead of continuous operation. The receiver wakes up at scheduled intervals to examine messages and then returns to sleep mode. The wake-up frequency is dynamically adjusted based on noise detection, creating a periodic action pattern that balances message reception accuracy with battery conservation
Solution Approach 2:
The first receiver autonomously monitors incoming signals and selectively wakes up the second receiver only when necessary. This self-service mechanism eliminates the need for continuous monitoring by the second receiver, maintaining message reception accuracy while significantly reducing power consumption through intelligent, event-driven wake-up activation
3Speed
If the first receiver wakes up the second receiver for every received message, then communication responsiveness is improved, but power consumption increases
Solution Approach 1:
The first receiver acts as an intermediary between the incoming message and the second receiver. It filters and evaluates received messages, selectively activating the second receiver only when the message warrants attention. This intermediary function maintains communication responsiveness for important messages while avoiding unnecessary wake-ups that would waste energy
Solution Approach 2:
The system applies partial action by waking up the second receiver only for a subset of received messages rather than all messages. The first receiver evaluates each message and determines whether full activation is necessary, applying wake-up action selectively based on message importance and noise conditions, thereby reducing overall power consumption while maintaining responsiveness for critical communications
Data Source
AI summary
Techniques for use with an implantable medical device (IMD) reduce how often a first receiver of the IMD wakes up a second receiver thereof to reduce power consumption. A received message and/or a channel over which messages can be received is/are examined, and a value is adjusted based on results thereof. After being adjusted, the value is compared to a first threshold if the IMD is in a normal state, or compared to a second threshold if the IMD is in a noise state. If in the normal state, there is a determination whether to stay in the normal state or switch to the noise state. If in the noise state, there is a determination whether to stay in the noise state or switch to the normal state. At least the second receiver is temporarily put to sleep, if the IMD is maintained in or switched to the noise state.