RFID Receiver Power State Transition for Packet Reconstruction
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Solution Overview
Problem
Battery-less RFID tag devices face challenges in processing lengthy wireless signal packets due to frequent power loss, especially when operating within strict protocols that limit their functional range and reliability, particularly in environments with fluctuating RF power availability.
Innovation Solution
A receiver device transitions to a lower power state mid-packet reception to conserve energy and incrementally reconstruct wireless signal packets over repeated transmissions, using power-gating and energy harvesting to optimize operations during periods of reduced RF power availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If battery-less RFID tag devices process lengthy wireless signal packets continuously, then complete packet reception is achieved, but power consumption increases causing frequent power loss
Solution Approach 1:
The receiver device dynamically transitions between different power states (active and sleep) during packet reception. The device activates processing circuitry only when needed to receive packet portions and enters sleep mode during intervals, adapting power consumption to the actual reception requirements rather than maintaining continuous operation.
Solution Approach 2:
The wireless signal packet is divided into multiple portions transmitted across different time slots. The receiver processes only the necessary portions during active periods and can enter sleep mode during intervals between portions, segmenting the reception process to optimize power usage while ensuring complete packet reconstruction.
2Measurement precision
If the receiver device remains in active power state to process complete packets, then processing accuracy is maintained, but energy depletes faster reducing operational duration
Solution Approach 1:
The receiver device employs periodic activation patterns, transitioning between active and sleep states in regular intervals synchronized with the packet transmission schedule. This periodic action allows the device to maintain processing accuracy during active periods while extending operational duration through controlled sleep periods.
Solution Approach 2:
The device changes its operational parameters by switching between different power states. During active periods, full processing capability is maintained for accuracy. During sleep periods, processing is suspended to conserve energy. The system dynamically adjusts these parameters based on the reception progress and packet structure.
3Use of energy by moving object
If the device enters sleep mode during packet reception, then power consumption is reduced, but packet reconstruction becomes difficult
Solution Approach 1:
The receiver device performs preliminary actions by receiving and buffering packet portions during active periods before entering sleep mode. The device prepares the received data in advance, organizing it in a manner that facilitates later reconstruction, thereby reducing the complexity of reassembly operations that must occur after waking from sleep state.
Solution Approach 2:
A buffer memory acts as an intermediary between the received packet portions and the final reconstruction process. The buffer stores intermediate data during active periods and maintains it during sleep periods, serving as a mediator that simplifies the reconstruction process by providing organized, accessible data without requiring complex real-time processing during state transitions.
4Reliability
If multiple iterations of signal packets are transmitted, then reliable reception is achieved, but transmission time increases
Solution Approach 1:
The receiver device maintains continuous useful action by processing packet portions during each active period across multiple iterations. Rather than waiting for complete packet reception before processing, the device continuously accumulates and processes available data portions, reducing the effective transmission time needed while maintaining reliability through iterative reception.
Solution Approach 2:
The device performs self-service by autonomously managing its own power state transitions and packet reconstruction process. It independently determines when to activate, what portions to process, when to enter sleep mode, and how to reconstruct complete packets from received portions across iterations, optimizing the balance between reliability and transmission time without external control.
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 enables robust and reliable communication for IoT devices by ensuring the reconstruction of complete wireless signal packets despite intermittent power availability, enhancing operational effectiveness and compliance with existing protocols.
Implementation Method 1
processing circuits of such a battery-less device may be powered, at least in part, by radio frequency (RF) energy, light energy or acoustical energy transmitted by devices in a close proximity and collected at the battery-less device
Data Source
AI summary
Subject matter disclosed herein may relate to reconstructing wireless signal packets and may relate more particularly to reconstructing wireless signal packets from iterations of the wireless signal packets repeatedly transmitted by a transmitter device.