Dynamic Receiver Sensitivity Control for Implantable Medical Devices
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Solution Overview
Problem
Implantable medical devices (IMDs) face challenges in prolonging battery life due to power consumption from wireless communication, as existing methods often require a tradeoff between communication robustness and energy efficiency, leading to suboptimal longevity.
Innovation Solution
The method involves dynamically adjusting the sensitivity of the communication receiver in IMDs based on the strength of received implant-to-implant communication signals, using a controller to increase, decrease, or maintain sensitivity, thereby optimizing energy usage while maintaining minimum signal-to-noise ratio, and adjusting thresholds based on patient activity levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensitivity of the communication receiver is increased to maintain communication robustness, then the signal-to-noise ratio is improved, but the energy consumption increases
Solution Approach 1:
The patent implements dynamic sensitivity adjustment where the receiver sensitivity is not fixed but adapts in real-time based on measured signal strength. The controller continuously monitors communication signal characteristics and adjusts the receiver sensitivity accordingly, transitioning from a static to a dynamic system that optimizes the balance between communication robustness and energy consumption.
Solution Approach 2:
The patent changes the sensitivity parameter of the communication receiver based on measured signal strength. By adjusting this key parameter dynamically, the system can operate at lower sensitivity (and thus lower energy consumption) when signals are strong, while maintaining high sensitivity only when necessary for robust communication, directly resolving the contradiction between reliability and energy use.
2Use of energy by moving object
If the sensitivity of the communication receiver is decreased to reduce energy consumption, then the energy usage level is reduced, but the signal-to-noise ratio deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the measured signal strength is continuously fed back to the controller, which then adjusts the receiver sensitivity accordingly. This closed-loop control ensures that the signal-to-noise ratio is maintained at acceptable levels while minimizing energy consumption, as the system only uses high sensitivity when actually needed based on real-time conditions.
Solution Approach 2:
The system performs self-adjustment of receiver sensitivity based on its own measurements of signal strength. The IMD autonomously monitors communication quality and modifies its receiver parameters without external intervention, enabling it to self-optimize the balance between energy consumption and communication reliability based on actual operating conditions.
3Ease of operation
If fixed sensitivity settings are used to simplify device operation, then the ease of operation is improved, but the adaptability to different signal conditions deteriorates
Solution Approach 1:
The system automatically adapts to different signal conditions through self-monitoring and self-adjustment of receiver sensitivity. The IMD independently measures signal strength and modifies its operation accordingly, eliminating the need for manual configuration or complex user intervention while maintaining high adaptability to varying communication environments.
Solution Approach 2:
The patent transforms the static sensitivity settings into a dynamic system that automatically adapts to different signal conditions. This dynamic approach maintains operational simplicity for the user while providing extensive adaptability, as the system handles the complexity of adaptation internally through real-time measurements and adjustments.
Data Source
AI summary
Described herein is an implantable medical device (IMD) that wirelessly communicates another IMD, and methods for use therewith. Such a method can include receiving one or more implant-to-implant (i2i) communication signals from the other IMD using a communication receiver of the IMD, measuring a strength of at least one of the one or more received i2i communication signals or a surrogate thereof, and updating a strength metric based on the measured strength or surrogate thereof. The method further includes determining, based on the updated strength metric, whether to increase, decrease, or maintain the sensitivity of the communication receiver of the IMD, and responding accordingly such that the sensitivity is sometimes increased, sometimes decreased, and sometimes maintained. The method can also include selectively causing a transmitter of the IMD to transmit an i2i communication signal to the other IMD requesting that the other IMD adjust its transmission strength.