Ambient IoT Tag Feedback for Low-Power Uplink Interference Control

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Solution Overview

Problem

Existing wireless communication systems face challenges in reducing power consumption and uplink interference in battery-less ambient IoT devices, such as eTags, which are deployed for asset tracking and supply chain management, due to their inability to demodulate control information and random transmission timing.

Innovation Solution

Implementing a system where eTags embed quality metrics in their beacon signals, allowing energizing devices to adapt their signal power and schedule transmissions, and ESL radios to wake up based on these metrics to reduce interference and conserve battery life.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If eTags transmit beacons randomly without coordination, then simple transmission is achieved, but uplink interference increases

Engineering Contradiction:

Improvetransmission simplicityVSAvoiduplink interference

Core Design Contradiction:

Ease of operationVSObject-generated harmful factors

Solution Approach 1:

The system implements feedback by embedding quality metrics (such as received signal strength indicator) in beacon transmissions from eTags. The network entity receives these quality metrics and uses them to determine optimal energizing signal parameters, creating a closed-loop control system that reduces uplink interference while maintaining transmission simplicity

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system dynamically adjusts energizing signal power and timing based on feedback quality metrics from eTags. Instead of fixed parameters, the network entity modifies transmission characteristics in real-time to optimize network performance and minimize interference

Inventive Principle:

Principle #15Dynamics

2Reliability

If eTags continuously monitor and transmit, then communication reliability improves, but power consumption increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system employs periodic action by having ESL radios wake up at scheduled intervals to monitor beacons from eTags, rather than continuous monitoring. This periodic operation maintains communication reliability by regularly checking for eTag presence while significantly reducing power consumption during idle periods

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system uses self-service by having eTags autonomously determine when to transmit beacons based on their energy storage status and communication needs. Battery-less eTags transmit only when sufficient energy is available, while battery-powered devices intelligently manage their transmission schedules, reducing overall power consumption while maintaining reliability

Inventive Principle:

Principle #25Self-service

3Device complexity

If battery-less eTags harvest energy from energizing signals, then device complexity is reduced, but transmission timing becomes unpredictable

Engineering Contradiction:

Improvedevice complexityVSAvoidtransmission timing uncertainty

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The system replaces mechanical timing mechanisms with energy-based timing control. Battery-less eTags use harvested energy thresholds to trigger transmissions, substituting complex mechanical or electronic timing circuits with simpler energy-level-based decision logic that reduces device complexity while managing timing unpredictability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system changes parameters by adjusting energizing signal power and timing based on feedback from eTags about their energy status and transmission readiness. The network entity modifies energizing parameters dynamically to coordinate transmissions and reduce timing uncertainty

Inventive Principle:

Principle #35Parameter changes

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

The system effectively reduces power consumption and uplink interference by optimizing energizing signal power and scheduling, thereby extending battery life and improving communication efficiency in wireless networks.

Implementation Method 1

The apparatus includes at least one energy storage element... store, in the at least one energy storage element, energy from the one or more energizing signals

Methodology Applied

Scientific EffectEnergy storage: Accumulator (energy)

Data Source

PatentUS20260059453A1Reducing power consumption and uplink (UL) interference based on feedback from ambient internet of things (IOT) tags

Publication Date: 2026.02.26 QUALCOMM INC

AI summary

Systems and techniques are described for wireless communications. For example, a computing device can receive one or more energizing signals from one or more energizing devices. The computing device can store, in the computing device (e.g., in an energy storage element), energy from the one or more energizing signals. The computing device can determine a quality metric based on the computing device, the one or more energizing signals, and/or the one or more energizing devices. The computing device can transmit, to a network entity via one or more wireless communication devices based on the energy stored in the computing device, a beacon comprising the quality metric for the network entity to determine one or more subsequent energizing signals.