Cell Selection Using Low Power Wake-Up Signal Strength
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Solution Overview
Problem
In 5G wireless systems, devices using low power wake-up signals for energy savings face challenges in detecting and decoding low power wake-up signals due to varying environmental conditions, leading to potential cell selection failures and reduced battery life in latency-critical applications.
Innovation Solution
Enhanced cell selection criteria that consider the strength of low power wake-up signals, incorporating a Vrms measurement and a predefined threshold, to improve detection probability and energy efficiency, allowing devices to selectively choose cells with better LP-WUS signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If devices use low power wake-up signals for energy savings, then energy consumption is reduced, but detection and decoding reliability deteriorates due to varying environmental conditions
Solution Approach 1:
The patent modifies the cell selection criterion by introducing a new parameter (low power wake-up signal quality metric) alongside existing parameters (cell selection reception level and quality). This allows the system to adapt to varying environmental conditions while maintaining low power operation, resolving the contradiction between energy savings and detection reliability
Solution Approach 2:
The patent performs preliminary evaluation of the low power wake-up signal quality during cell selection, before actual data transmission. This preliminary assessment ensures that only cells with adequate signal quality are selected, preventing future detection failures while maintaining energy-efficient low power mode operation
2Device complexity
If devices select cells based on traditional criteria only, then cell selection process is simple, but cell selection failures occur due to insufficient consideration of low power wake-up signal quality
Solution Approach 1:
The patent segments the cell selection criterion into distinct components: traditional cell selection reception level, cell selection quality, and the new low power wake-up signal quality metric. Each component is evaluated separately and combined to make the final selection decision, improving reliability without creating a monolithic complex system
Solution Approach 2:
The enhanced cell selection criterion serves multiple functions simultaneously: it maintains backward compatibility with traditional selection methods, adds low power wake-up signal quality assessment, and provides a unified framework for cell selection that works across different operating conditions and signal types
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for enhanced cell (re) selection for low power wakeup signal (LP-WUS) mode of operation. A method may include receiving a low power wakeup signal from a network element. The method may also include evaluating a strength of the low power wakeup signal. The method may further include determining whether a cell selection criterion is satisfied based on a cell selection reception level value, a cell selection quality value, and the low power wakeup signal. In addition, the method may include carrying out a cell selection based on the determination of whether the cell selection criterion is satisfied.