5G Transmission Triggering with a Separate Low-Power Wake-Up Receiver
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Solution Overview
Problem
Existing 5G devices face challenges in balancing battery life and low latency due to high power consumption during long discontinuous reception cycles, which is unsuitable for critical applications like fire detection, where quick response is required.
Innovation Solution
Implementing a low-power wake-up receiver (LP-WUR) to detect a low-power wake-up signal (LP-WUS) that triggers the main receiver only when necessary, reducing power consumption by keeping it in deep sleep mode until triggered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the main receiver continuously monitors for signals during long discontinuous reception cycles, then coverage and reliability are improved, but power consumption increases
Solution Approach 1:
The receiver is divided into two separate functional components: a low-power wake-up receiver that continuously monitors for wake-up signals, and a main receiver that remains in deep sleep mode until triggered. This segmentation allows the system to maintain reliable signal detection through the wake-up receiver while dramatically reducing overall power consumption by keeping the power-intensive main receiver inactive during discontinuous reception cycles.
Solution Approach 2:
A wake-up signal acts as an intermediary between the network and the main receiver. The wake-up receiver detects this intermediate signal and triggers the main receiver only when necessary, rather than requiring the main receiver to continuously monitor all signals. This intermediary mechanism enables reliable communication while minimizing power consumption.
2Duration of action of moving object
If the main receiver stays in deep sleep mode to reduce power consumption, then battery life is extended, but response latency increases
Solution Approach 1:
The wake-up receiver performs preliminary monitoring actions continuously in the background while the main receiver sleeps. By having this dedicated low-power component actively watching for trigger signals, the system prepares for potential communications without requiring the main receiver to remain active, thus extending battery life while maintaining the capability for rapid response when needed.
Solution Approach 2:
The system replaces the traditional mechanical approach of having the main receiver continuously active with a more efficient architecture where a specialized wake-up receiver triggers the main receiver only when necessary. This substitution eliminates the need for the main receiver to wake up and check for signals during each discontinuous reception cycle, reducing latency while extending battery life.
3Use of energy by moving object
If a separate low-power wake-up receiver is added to trigger the main receiver, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The receiver architecture is segmented into two specialized components with distinct, simplified functions: a wake-up receiver dedicated solely to detecting trigger signals and a main receiver dedicated to processing full communications. This functional segmentation simplifies each individual component's design while achieving overall system efficiency, as each receiver can be optimized for its specific purpose rather than requiring one receiver to handle all functions.
Data Source
AI summary
Various embodiments herein provide techniques related to a main receiver of a user equipment (UE) and a wake-up receiver (WUR) of the UE. In the embodiments, the WUR receives a low-power wake-up signal (LP-WUS) from a base station. Based on the LP-WUS, the WUR may be configured to wake-up the main receiver of the UE, wherein the UE identifies received configuration information including duty cycle parameters and detects the LP-WUS based on the configuration information, and wherein the UE sets a state of the wake-up receiver based on an RRC state of the main receiver.