Wake-Up Radio Timing for Concurrent Main Radio Operation
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Solution Overview
Problem
Existing wireless communication systems, particularly in 5G NR, face challenges in optimizing power consumption and efficiency through concurrent operations of low power wakeup radio (LP-WUR) and main radio (MR), leading to suboptimal energy usage and communication latency.
Innovation Solution
Implementing a method for wireless communication that includes configuring a low power wakeup signal for a second radio to initiate operation of a first radio at a specified time, enabling concurrent LP-WUR and MR operations, and allowing for floating CDRX and PDCCH monitoring windows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the main radio (MR) is continuously operated to ensure communication readiness, then communication latency is reduced, but power consumption increases
Solution Approach 1:
The radio system is segmented into two distinct components: a low-power wakeup radio (LP-WUR) for monitoring wake-up signals and a main radio (MR) for full communication operations. This segmentation allows the MR to remain in a low-power state while the LP-WUR maintains monitoring capability, resolving the contradiction between continuous readiness and power consumption.
Solution Approach 2:
The LP-WUR performs preliminary monitoring of wake-up signals before activating the MR. This preliminary action enables the system to maintain communication readiness without keeping the power-hungry MR continuously active, reducing power consumption while maintaining low latency through rapid MR activation upon detecting a wake-up signal.
2Productivity
If the main radio (MR) is activated frequently to monitor for communications, then communication efficiency is improved, but power consumption increases
Solution Approach 1:
The monitoring function is segregated from the main communication function. The LP-WUR handles wake-up signal monitoring with minimal power consumption, while the MR focuses on actual communication operations. This segmentation improves communication efficiency by ensuring the MR is always ready to communicate while minimizing its power consumption during idle monitoring periods.
Solution Approach 2:
The LP-WUR acts as an intermediary between the external wake-up signals and the main radio system. It filters and pre-processes incoming signals, activating the MR only when relevant wake-up signals are detected. This intermediary role improves communication efficiency by preventing unnecessary MR activations while maintaining responsiveness to actual communication requests.
3Use of energy by moving object
If concurrent operations of LP-WUR and MR are implemented, then power consumption is optimized, but system complexity increases
Solution Approach 1:
The system is divided into functionally distinct LP-WUR and MR components with clearly defined roles. The LP-WUR handles wake-up signal detection while the MR handles full communication protocols. This functional segmentation optimizes power consumption by keeping the MR dormant when not needed, while the increased structural complexity of having two radio components is accepted as a trade-off for significant power savings.
4Reliability
If the main radio (MR) operates at full power continuously, then communication reliability is improved, but energy loss increases
Solution Approach 1:
The LP-WUR performs preliminary monitoring and signal detection before activating the MR. This preliminary action ensures that the MR is activated only when necessary, maintaining communication reliability by ensuring it's ready when needed while minimizing energy loss by keeping it in low-power state during idle periods.
Solution Approach 2:
The LP-WUR serves as an intermediary that protects the energy-intensive MR from unnecessary activations. It filters incoming signals and activates the MR only when genuine communication requests are detected, thereby maintaining communication reliability while significantly reducing energy loss associated with continuous or frequent MR operations.
Data Source
AI summary
A method for wireless communication at a user equipment (UE) and related apparatus are provided. The apparatus is configured to receive a configuration for a wake-up signal associated with a second radio having a lower power consumption than a first radio at the UE. The configuration includes a starting time for an operation of the first radio based on a reception of the wake-up signal. The apparatus is further configured to receive the wake-up signal via the second radio, and start the operation of the first radio at the starting time following the reception of the wake-up signal via the second radio.