Low Power Receiver for Mobile Wireless Power Saving
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Solution Overview
Problem
5G devices face challenges in achieving both low latency and long battery life due to high power consumption, particularly in RRC_CONNECTED state, and the need for frequent wake-ups during DRX cycles.
Innovation Solution
The implementation of a method and apparatus that utilize a low power receiver (LR) to monitor wake-up signals, allowing the main radio (MR) to consume power only when necessary, thereby reducing overall power consumption and maintaining reasonable latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the main radio is kept active to reduce latency, then response time is improved, but power consumption increases
Solution Approach 1:
The receiver is segmented into two distinct components: a low-power receiver that remains active with minimal power consumption, and a main radio that is activated only when needed. This segmentation allows the system to maintain responsiveness while dramatically reducing overall power consumption during idle periods.
Solution Approach 2:
The low-power receiver performs preliminary monitoring of wake-up signals before the main radio is activated. By detecting wake-up signals in advance using minimal power, the system prepares for upcoming data transmission tasks, ensuring low latency response while avoiding premature activation of the high-power main radio.
2Use of energy by moving object
If the main radio is turned off to save power, then energy consumption is reduced, but latency increases
Solution Approach 1:
The low-power receiver serves as an intermediary component between the idle state and full main radio operation. It monitors for wake-up signals and triggers main radio activation only when necessary, eliminating the need to keep the main radio continuously active while ensuring rapid response to actual data transmission needs.
Solution Approach 2:
The system dynamically transitions between different operational states: the low-power receiver operates continuously in a low-power state, and upon detecting a wake-up signal, dynamically activates the main radio for data transmission. This dynamic state management optimizes the balance between power consumption and response latency.
3Productivity
If the main radio remains active during DRX cycles, then data transmission speed is improved, but battery life is reduced
Solution Approach 1:
The reception function is segmented between a permanent low-power receiver and an on-demand main radio. During DRX cycles, only the low-power receiver operates, enabling the system to extend battery life significantly while maintaining the capability for rapid data transmission when activated.
Solution Approach 2:
The main radio is activated periodically only when wake-up signals are detected, rather than remaining continuously active. This periodic activation pattern allows the low-power receiver to handle idle monitoring, extending battery life during DRX cycles while ensuring data transmission capability is available when needed.
Data Source
AI summary
A solution for monitoring low power signal in RRC_INACTIVE state is provided. The solution provides means to monitor low power signal to determine whether to switch to main receiver from low power receiver. With this solution, the terminal stays in low power state as much as possible that results in reduced battery power consumption.