IMD RF Telemetry Power Management via Packet Size Prediction
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Solution Overview
Problem
RF-based communication in implantable medical devices (IMDs) consumes more power, leading to reduced battery longevity due to the need for frequent radio equipment power-downs during communication sessions, which can prolong the overall communication time and increase energy consumption.
Innovation Solution
Implementing a power down processor in the communication unit that selectively activates and deactivates the IMD's radio equipment based on data packet size predictions, allowing the IMD to transmit data before powering down and reducing unnecessary power-down periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power save algorithm turns off IMD radio equipment during communication session, then power consumption is reduced, but communication session time is prolonged
Solution Approach 1:
The system predicts whether the IMD will have additional data to transmit before initiating power down. By using data packet size analysis and timer mechanisms, the communication unit determines in advance whether it's safe to power down the radio equipment, preventing unnecessary power down delays while still enabling power saving when appropriate.
Solution Approach 2:
The power down decision is made dynamic rather than static. The system continuously monitors data packet characteristics and adjusts power down timing based on real-time conditions. The timer mechanism allows flexible adjustment of power down delays based on predicted data transmission needs, optimizing the balance between power saving and communication efficiency.
2Speed
If RF telemetry is used for communication, then bit rate and range are improved, but power consumption increases
Solution Approach 1:
The system implements periodic power down cycles during communication sessions. By turning off the radio equipment for specific intervals (20-30 ms) while maintaining communication capability, the system reduces average power consumption while still utilizing RF telemetry for data transmission when needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces the total energy consumption during communication sessions, extends the battery life of IMDs, and ensures faster data delivery without interrupting data transmission.
Implementation Method 1
RF based telemetry or communication
Data Source
AI summary
A non-implantable communication unit conducts wireless communication with an implantable medical device (IMD). The communication unit comprises a request processor for generating power down requests destined to the IMD and triggering temporary power down of the IMD radio equipment. When the communication unit receives a data packet from the IMD or a connected programmer it determines the size of the data packet. A timer processor sets a timer to a value defined based on the determined size. A processor controller selectively controls the operation of request processor to generate or stop generating the power down requests based on a current value of the timer. Power down of the IMD radio equipment is thereby prevented if it is likely that the IMD comprises data to transmit to the communication unit as predicted based on data packet sizes.