WUS and RRM Measurement Interaction in DRX Modes
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Solution Overview
Problem
There is a need for improved communication in Discontinuous Reception (DRX) and Extended Discontinuous Reception (eDRX) modes, particularly in supporting different Wake-Up Signal (WUS) configurations and ensuring accurate Radio Resource Management (RRM) measurements when a User Equipment (UE) moves to a new cell, as existing technologies face challenges in power savings and measurement accuracy.
Innovation Solution
The solution involves configuring WUS modes and RRM measurements at both the base station and UE levels, where the base station receives indications from a core network entity about the UE's DRX or eDRX mode and configures appropriate WUS settings, and the UE adjusts its measurement strategies, such as switching between relaxed and regular RRM measurements, and WUS modes based on cell reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE performs relaxed RRM measurement to save battery power in DRX/eDRX mode, then power consumption is reduced, but measurement accuracy and detection capability of new cells deteriorate
Solution Approach 1:
The patent applies dynamics by making the RRM measurement frequency adaptive rather than fixed. The UE dynamically adjusts between relaxed measurement mode (during stable DRX operation) and regular measurement mode (upon cell reselection or when movement is detected), allowing the system to optimize between power saving and measurement accuracy based on current operational context
Solution Approach 2:
The patent changes the parameter of measurement frequency from a static configuration to a dynamic parameter that can switch between different states. By modifying when and how often RRM measurements are performed based on cell reselection events and movement detection, the system achieves both power efficiency and measurement accuracy
2Adaptability or versatility
If the UE supports different WUS configurations for DRX and eDRX modes, then adaptability to different operational requirements is improved, but device complexity increases
Solution Approach 1:
The patent implements universality by designing a unified WUS configuration framework that serves both DRX and eDRX modes through common procedural mechanisms. The same base station procedures and UE processing logic handle WUS configurations across different DRX types, reducing complexity while maintaining adaptability through parameter variations rather than structural differences
3Reliability
If the UE frequently performs regular RRM measurements to ensure accurate new cell detection, then measurement reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by performing RRM measurements at strategically chosen moments - specifically upon cell reselection events and when movement is detected - rather than continuously. This preliminary measurement approach ensures accurate new cell detection when most needed while avoiding unnecessary power consumption during stable operation
Solution Approach 2:
The patent implements periodic action by scheduling RRM measurements at specific intervals and trigger events rather than continuously. The measurement frequency is periodic and event-driven, aligning with DRX cycles and cell reselection events, thereby balancing detection reliability with power efficiency
Data Source
AI summary
A method, apparatus, and computer-readable medium are provided that improves power savings and reliability of communication for DRX/eDRX modes. A base station may receive an indication from a network entity that a UE is in a DRX/eDRX mode. The base station may configure a WUS mode for the UE corresponding to the DRX mode or the eDRX mode. A UE may receive the WUS mode from the base station. When a UE is configured for relaxed RRM measurements for a first cell and moves to a second cell that supports a relaxed RRM measurement, the UE may return to a regular RRM measurement for a time period. When a UE configured for a WUS mode for a first cell moves to a second cell that supports the WUS mode, the UE may return to the DRX mode or the eDRX mode without the WUS mode for a period of time.