Wake-Up Signal Management to Reduce False Main Radio Wake-Ups
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Solution Overview
Problem
Existing wireless communication technologies face challenges in minimizing false wake-up events and optimizing energy efficiency for wireless devices, particularly in scenarios requiring low latency and extended battery life, due to the tradeoffs between power consumption, sensitivity, and coverage considerations in wake-up receiver designs.
Innovation Solution
Implementing enhanced wake-up signal management schemes that include group-based assignment, differentiated time-frequency resources, adaptive discontinuous reception cycles, no-wake-up windows, and inactivity timers to reduce false wake-ups and optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a wake-up receiver (WUR) is used to detect wake-up signals, then power consumption is reduced and battery life is extended, but false wake-up events occur due to noise and reduced sensitivity
Solution Approach 1:
The system segments the wake-up detection function into two parts: a low-power WUR for initial detection and a main receiver for confirmation. The WUR operates independently in a segmented manner to detect potential wake-up signals, while the main receiver is activated only when needed to verify the signal and reduce false wake-ups caused by noise
Solution Approach 2:
The WUR acts as an intermediary component between the sleep state and the main receiver. It filters and pre-processes wake-up signal detections, serving as a mediator that decides when the power-consuming main receiver should be activated, thereby reducing false wake-ups while maintaining low average power consumption
2Reliability
If the main receiver monitors wake-up signals, then coverage and sensitivity are maintained, but power saving gains are limited
Solution Approach 1:
The system dynamically switches between two operational modes: using the WUR for wake-up detection during sleep periods to save power, and activating the main receiver when wake-up signals are detected or during active communication periods to ensure full coverage and sensitivity. This dynamic adaptation resolves the contradiction between power consumption and reliability
3Loss of time
If wake-up signal detection frequency is increased to reduce latency, then downlink latency is reduced, but energy consumption increases
Solution Approach 1:
The WUR operates periodically at configured intervals to monitor for wake-up signals, providing a balance between latency reduction and energy consumption. Instead of continuous monitoring, the periodic operation allows the device to check for signals at regular intervals, reducing average power consumption while still maintaining acceptable response times for downlink transmissions
Data Source
AI summary
A method, system and apparatus are disclosed. A network node is configured to communicate with a wireless device. The network node is configured to configure the wireless device according to a wake-up signal, WUS, scheme, the WUS scheme configured for at least one of: reducing an occurrence of a false wake-up of a main radio of the wireless device; configuring the wireless device with a no-wake-up window, the no-wake-up window having a time period during which a main radio of the wireless device is prevented from waking; and configuring the wireless device with an inactivity timer configured for, after the occurrence of the false wake up, keeping the main radio awake for the duration of the inactivity timer. The network node is configured to communicate with the wireless device based on the WUS scheme.