Sidelink Wake-Up Receiver Configuration for UE Power Saving
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Solution Overview
Problem
User equipment in wireless communications networks experiences excessive power usage, reducing its capabilities.
Innovation Solution
Implementing a radio resource configuration that includes monitoring sidelink control channels for wake-up signals using a wake-up receiver and a separate baseband processing unit, allowing for selective decoding of data channels and transitioning to discontinuous reception sleep to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment continuously monitors control channels and data channels to maintain communication readiness, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The receiver is divided into two separate receivers: a wake-up receiver that continuously monitors for wake-up signals with low power consumption, and a main receiver that processes control channels and data channels only when activated. This segmentation allows the system to maintain communication reliability by ensuring the main receiver is ready when needed while significantly reducing power consumption during idle periods by keeping the main receiver in sleep mode.
Solution Approach 2:
The system performs preliminary monitoring using the wake-up receiver to detect wake-up signals before activating the main receiver. This preliminary action allows the system to prepare for upcoming communication tasks in advance, ensuring the main receiver is activated just in time to maintain communication reliability while avoiding continuous operation that would increase power consumption.
2Productivity
If the user equipment activates the main receiver frequently to check for data transmissions, then data reception capability is improved, but battery life decreases
Solution Approach 1:
By segmenting the reception function into a always-on wake-up receiver and a sleep-mode main receiver, the system can maintain data reception capability through the wake-up receiver's monitoring of wake-up signals, while extending battery life by keeping the power-intensive main receiver inactive during idle periods. The main receiver is activated only when the wake-up receiver detects relevant signals.
Solution Approach 2:
The system implements periodic monitoring through the wake-up receiver that operates in low-power mode, activating the main receiver only periodically when wake-up signals are detected. This periodic action pattern maintains data reception capability while significantly extending battery life compared to continuous operation of the main receiver.
3Device complexity
If the user equipment uses a single receiver for both wake-up signal monitoring and data reception, then device complexity is reduced, but power saving capability is limited
Solution Approach 1:
The system divides the reception function into two separate receivers: a wake-up receiver dedicated to monitoring wake-up signals and a main receiver for processing control channels and data channels. This segmentation enables differentiated power management where the wake-up receiver operates continuously at low power while the main receiver sleeps during idle periods, achieving significant power savings without overly complicating the device architecture.
Solution Approach 2:
The wake-up receiver serves multiple functions: it continuously monitors for wake-up signals, determines whether data transmissions are intended for the user equipment, and triggers activation of the main receiver. This multi-functionality allows a single low-power component to perform critical reception tasks while the main receiver remains in sleep mode, improving power saving capability without substantially increasing device complexity.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for radio resource configuration for power saving. One method includes monitoring, via a first receiver including a wake-up receiver, a sidelink control channel for a WUS. The method includes monitoring, via a second receiver, a physical sidelink control channel and a data channel. The second receiver includes a baseband processing unit separate from the first receiver. The method includes receiving a radio resource configuration for WUS reception. The method includes receiving, outside an active period, the WUS in a resource indicated by the radio resource configuration. The method includes determining to wake-up the second receiver based on the WUS. The WUS includes a wake-up indicator bit, a destination identifier, or a combination thereof.