Low Power Wake-Up Receiver for Wireless Paging

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Solution Overview

Problem

Wireless network receivers consume excessive power during packet reception and idle waiting states, leading to inefficient power management in wireless communication systems.

Innovation Solution

Implementing a low power wake-up receiver that consumes less power than regular receivers when awake, using NDP format wake-up signals to trigger the primary receiver for data reception, and optimizing power save modes through targeted wake-up times and page-based communication protocols.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If receivers remain in awake state to receive packets, then communication reliability is improved, but power consumption increases

Engineering Contradiction:

Improvecommunication reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The receiver is divided into two independent parts: a low-power wake-up receiver that continuously monitors for wake-up signals, and a main receiver that remains in sleep mode until activated. This segmentation allows the system to maintain communication reliability through continuous monitoring while dramatically reducing power consumption by keeping the energy-intensive main receiver dormant.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The wake-up receiver performs preliminary monitoring and detection of wake-up signals before activating the main receiver. This preliminary action ensures that the main receiver is activated only when necessary, maintaining reliability by detecting incoming communications in advance while avoiding unnecessary power consumption from continuous main receiver operation.

Inventive Principle:

Principle #10Preliminary action

2Use of energy by moving object

If receivers use low power wake-up mode, then power consumption is reduced, but ability to receive regular communication signals is lost

Engineering Contradiction:

Improvepower consumptionVSAvoidsignal reception capability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The wake-up receiver acts as an intermediary between the external environment and the main receiver. It continuously monitors for wake-up signals using minimal power, and when a wake-up signal is detected, it triggers the activation of the main receiver. This intermediary approach maintains full signal reception capability while operating in low-power mode during idle periods.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system dynamically transitions between two operational states: a low-power state where only the wake-up receiver is active, and a full-operation state where the main receiver is activated upon detecting a wake-up signal. This dynamic adaptation allows the system to optimize power consumption based on actual communication needs while maintaining the ability to receive all types of signals when required.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS9544848B2Methods and apparatus for communicating short paging messages in a wireless communication network

Publication Date: 2017.01.10 QUALCOMM INC

AI summary

Systems, methods, and devices for communicating data in a wireless communications network are described herein. In some aspects, a wireless device includes a first receiver and a second receiver. The second receiver may be configured to consume less power than the first receiver. The second receiver receives a second signal wherein the second signal comprises a wake-up signal configured in NDP format including a signal field. The wireless device includes a circuit configured to take at least one action based on the second signal.