Wake-Up Receiver Front-End Module Power Management
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Solution Overview
Problem
Existing mobile communication systems face challenges in efficiently managing wake-up signals to reduce power consumption while maintaining communication latency within acceptable limits.
Innovation Solution
The implementation of a wake-up receiver apparatus within user equipment of mobile communication systems, which includes means for controlling the reception and transfer of wake-up signals in a low power mode, allowing for the activation of radio modules only when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the radio module operates continuously to ensure immediate communication response, then communication latency is reduced, but power consumption increases
Solution Approach 1:
The front-end module is segmented into multiple functional components (LNA, mixer, filters, switches) that can be independently controlled. This allows selective activation of only necessary components during wake-up signal reception, reducing overall power consumption while maintaining communication responsiveness
Solution Approach 2:
The system transitions between sleep mode and active mode periodically based on wake-up signal detection. The front-end module operates in a low-power state during idle periods and activates only when a wake-up signal is detected, achieving periodic operation that balances power savings with communication latency requirements
2Reliability
If all front-end module components are activated for wake-up signal reception, then signal reception reliability is improved, but power consumption increases
Solution Approach 1:
Different components of the front-end module are assigned different operational states based on their specific function and power consumption characteristics. The LNA operates at reduced power, while non-essential components are switched off, creating local quality variations that optimize the balance between reception reliability and power consumption
Solution Approach 2:
The operational parameters of the front-end module components are changed during wake-up signal reception. The LNA gain is adjusted, bandwidth filters are selectively applied, and component activation states are modified to achieve reliable signal detection with minimal power consumption
3Measurement precision
If the front-end module operates in normal mode for wake-up signal reception, then reception sensitivity is maintained, but power consumption increases
Solution Approach 1:
Instead of activating the complete front-end module in normal operating mode, only essential components are partially activated for wake-up signal reception. The LNA is activated with reduced gain, and critical path components are enabled while non-critical components remain in sleep mode, achieving sufficient sensitivity for wake-up detection without full operational power consumption
Data Source
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AI summary
A method, apparatus and computer program is described comprising: controlling reception of a wake-up signal (WUS) by a first front-end module of a user equipment of a mobile communication system in a low power mode of operation; and controlling transfer of the received wake-up signal from the first front-end module to an output of the first front-end module in the low power mode of operation.