DRX Mode UE Autonomous Measurement Management
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) in discontinuous reception (DRX) mode faces limitations in performing accurate measurement evaluations due to limited opportunities for measurement samples, which hinders effective quality assessment and handover processes.
Innovation Solution
The UE is enabled to autonomously enter a measurement state and generate reports when the serving cell's quality falls below a predetermined threshold, allowing for continuous inter-frequency measurements and utilizing natural gaps in the DRX pattern to perform measurements independently, while the network configures measurement events and gap allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If UE operates in DRX mode to save power, then power consumption is reduced, but measurement accuracy deteriorates due to limited measurement opportunities
Solution Approach 1:
The network performs preliminary configuration of measurement events, thresholds, and gap allocations before the UE enters DRX mode. This allows the UE to have pre-established measurement criteria and authorized measurement opportunities, enabling accurate measurements to be performed during DRX cycles without requiring continuous network intervention or sacrificing measurement quality for power savings.
2Measurement precision
If UE performs continuous measurements to maintain accuracy, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic measurement opportunities aligned with DRX cycles, where the UE performs measurements at specific intervals rather than continuously. The network configures measurement gap patterns that coincide with DRX active periods, allowing the UE to conduct measurements periodically during awake phases and remain in sleep mode otherwise, thus maintaining measurement accuracy while significantly reducing power consumption.
3Measurement precision
If network allocates measurement gaps for UE measurements, then measurement capability is improved, but network resource consumption increases
Solution Approach 1:
The UE performs self-service measurements during its own DRX active periods and natural gaps without requiring dedicated network-scheduled measurement gaps. The UE autonomously identifies suitable measurement opportunities within its DRX cycle and executes measurements independently, eliminating the need for the network to allocate separate measurement gap resources and thereby reducing network resource consumption while maintaining UE measurement capability.
Data Source
AI summary
Systems and methods that manage measurement behavior of a UE in connected mode and while in discontinuous operation. The UE is enabled to autonomously (e.g., independent of instructions from network) enter a state of measurement, and generate a measurement report for the network, when quality of serving cell falls below the threshold of S_Intrasearch parameter. Moreover, the UE can perform inter-frequency and/or inter-RAT measurements autonomously by employing the “natural gaps” from its DRX pattern, when such are adequate to perform such measurements.