Wireless Transceiver Wakeup Signal Detection
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Solution Overview
Problem
Wireless transceivers in devices with small energy sources face challenges in reducing power consumption without increasing latency, as they need to balance energy efficiency with the ability to receive signals effectively.
Innovation Solution
The implementation of a system with multiple forms of wake-up signal detectors (active, passive, and hybrid) that are activated based on specific timing indications, allowing the transceiver to switch between low-power and high-reliability modes to minimize power consumption and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless transceiver operates continuously in active state, then signal reception reliability is improved, but power consumption increases
Solution Approach 1:
The wireless transceiver is segmented into multiple operational states (active, idle, inactive) with distinct power consumption characteristics. The system divides the operation into phases where the transceiver can switch between these states based on activity requirements, allowing reliable signal reception during active periods while conserving energy during idle and inactive periods.
Solution Approach 2:
The transceiver employs periodic activation patterns where it alternates between active and low-power states. During inactive periods, the transceiver remains dormant to save power, and is periodically activated to check for wake-up signals or transmit data, thus maintaining reliability while reducing overall power consumption.
2Use of energy by moving object
If the transceiver enters idle or inactive states to reduce power consumption, then energy efficiency is improved, but latency increases
Solution Approach 1:
The system performs preliminary actions by monitoring for wake-up signals during inactive states and preparing for activation in advance. When a wake-up signal is detected, the transceiver is activated before actual data transmission begins, reducing the effective latency experienced during idle/inactive periods while maintaining energy efficiency.
Solution Approach 2:
The transceiver dynamically adjusts its operational state based on real-time conditions. It can transition between active, idle, and inactive states depending on traffic patterns, signal strength, and power availability, optimizing the balance between energy efficiency and latency response for varying operational scenarios.
3Reliability
If multiple forms of wake-up signal detectors are used, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The detection system is segmented into multiple specialized detectors, each optimized for specific wake-up signal types or conditions. This segmentation allows the system to achieve high detection reliability for different signal formats while keeping each individual detector relatively simple in structure and operation.
Solution Approach 2:
The multiple wake-up signal detectors are designed with universal functionality to handle various signal types and transmission conditions. Each detector can operate independently or in combination with others, providing robust detection across different scenarios without requiring entirely separate detection systems for each case.
Data Source
AI summary
In order to reduce power consumption of a wireless communication apparatus without unduly increasing latency a way of triggering activation of a transceiver on the apparatus is provided that uses different forms of wakeup signals and corresponding forms of wakeup signal detectors. This allows the transceiver to operate in a discontinuous receiving mode, with the different wakeup signal receivers detecting for wakeup signals at different times the times being indicated to the apparatus by a wakeup signal pattern sent by the network.