Wake-Up Receiver Gain Adjustment for WUS Coverage Detection
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Solution Overview
Problem
In 5G/NR technology, user equipment (UE) in idle mode faces challenges in balancing power consumption and radio frequency sensitivity of the wake-up receiver (WUR), leading to potential loss of network connection due to limited WUS coverage and mobility, especially for devices without continuous power sources.
Innovation Solution
Implementing a method for UE to monitor a current cell for both a first and second wake-up signal beacon, iteratively adjusting gain settings, and determining coverage region based on beacon detection within a threshold, allowing the UE to switch between WUS and legacy paging modes to maintain network connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the wake-up receiver operates with high gain settings to extend coverage, then the coverage area is improved, but power consumption increases and false detections occur
Solution Approach 1:
The patent implements dynamic gain adjustment where the wake-up receiver iteratively changes its gain setting between iterations. The gain is adjusted based on whether the WUS beacon was detected in the previous iteration, allowing the system to adaptively find the optimal coverage range while minimizing power consumption. This dynamic approach resolves the contradiction by making the gain setting variable rather than fixed at a high value.
Solution Approach 2:
The patent changes the operational parameters of the wake-up receiver by iteratively modifying the gain setting. The system starts with an initial gain value and adjusts it based on detection results, ultimately determining an optimal gain setting that provides sufficient coverage while consuming minimal power. This parameter change approach allows the system to balance coverage area and power consumption effectively.
2Measurement precision
If the wake-up receiver uses high gain settings to detect beacons at cell edges, then detection capability is improved, but false detections and unreliable operation increase
Solution Approach 1:
The patent implements a feedback mechanism where the detection result of each WUS beacon is used to adjust the gain setting for the next iteration. The system monitors whether the beacon was successfully detected and uses this information to iteratively refine the gain setting. This feedback loop ensures that the system achieves reliable detection by avoiding consistently high gain settings that cause false detections while maintaining sufficient sensitivity at cell edges.
Solution Approach 2:
The patent applies partial action by using an iterative approach where the gain setting is adjusted incrementally rather than maintaining a constantly high gain. The system performs detection with varying gain levels and selects the optimal setting, avoiding the excessive action of always using maximum gain. This approach achieves sufficient detection capability while improving reliability by reducing false detections.
3Reliability
If the UE frequently checks for WUS beacons to maintain connectivity, then network connection reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action by having the wake-up receiver monitor for WUS beacons at specific intervals rather than continuously. The system uses discontinuous reception (DRX) cycles and monitors beacons periodically, which maintains network connection reliability while significantly reducing power consumption compared to continuous monitoring. This periodic approach resolves the contradiction by balancing connectivity checks with energy conservation.
Solution Approach 2:
The patent enables the wake-up receiver to autonomously determine its optimal operating parameters, including gain settings and monitoring intervals. The system self-adjusts based on detection results and environmental conditions, reducing the need for frequent network interactions and minimizing power consumption while maintaining reliable connectivity. This self-service capability allows the UE to balance reliability and power consumption independently.
Data Source
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AI summary
Wake-up signal and wake-up receiver coverage detection is provided. A method for wake-up signal and wake-up receiver coverage detection may include monitoring a current cell for a first wake-up signal beacon during a wake-up signal mode and monitoring the current cell for a second wake-up signal beacon during the wake-up signal mode for one or more iterations, upon the first wake-up signal beacon being detected. The current cell may be iteratively monitored and during each iteration a gain setting may be incrementally reduced for monitoring for the second wake-up signal beacon. The method may also include determining a coverage region of the current cell based on whether the second wake-up signal beacon is detected by the monitoring within a threshold number of iterations.