Cell DTX and DRX Management for 5G UE Energy Optimization
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Solution Overview
Problem
In 5G wireless communication systems, managing discontinuous reception and transmission (DRX) operations across multiple serving cells leads to excessive complexity for user equipment (UE), increasing energy consumption and latency, while existing techniques do not effectively mitigate these issues.
Innovation Solution
The method involves configuring cell-specific active and inactive times, activating Cell-DTX and Cell-DRX to reduce energy consumption by limiting downlink and uplink signal transmission/reception periods, and using specific timers and timers-related parameters to manage PDCCH monitoring and scheduling requests, thereby optimizing network energy efficiency and UE complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple serving cells are configured for UE, then data rate and network capacity are improved, but UE complexity in managing DRX operation increases excessively
Solution Approach 1:
The patent merges DRX management across multiple serving cells by introducing a unified DRX configuration mechanism where the UE manages DRX operations for multiple cells through a single control framework. The network configures DRX parameters once for the UE, and the UE applies these parameters consistently across all serving cells, eliminating the need to manage separate DRX operations for each cell individually.
2Loss of energy
If Cell-DTX is activated for specific serving cell, then network energy consumption is reduced, but PDCCH monitoring complexity increases due to timer management
Solution Approach 1:
The patent implements self-service timer management where the UE automatically handles timer operations for Cell-DTX without requiring complex network control. The UE monitors its own timer status and autonomously determines when to perform PDCCH monitoring based on timer expiration events, eliminating the need for network-side timer management complexity.
3Loss of energy
If DRX operation is managed per cell, then energy saving is optimized, but latency increases due to excessive monitoring overhead
Solution Approach 1:
The patent creates a universal DRX management framework that serves multiple functions simultaneously: it enables energy saving across all serving cells while maintaining low latency through a unified monitoring approach. The single DRX configuration handles both energy optimization and latency requirements by coordinating PDCCH monitoring across all cells through one managed process rather than separate per-cell operations.
Data Source
AI summary
A Method and Apparatus for discontinuous reception and discontinuous transmission are provided. The method includes receiving a radio resource control (RRC) reconfiguration message, receiving a specific downlink control information, activating cell discontinuous transmission (DTX) for a specific serving cell based on the specific downlink control information, performing physical downlink control channel (PDCCH) monitoring for the specific serving cell based on whether a cell-dtx-timer of the specific serving cell is running, triggering a Scheduling Request (SR) for beam failure recovery, transmitting the SR, performing PDCCH monitoring for the specific serving cell regardless of whether the cell-dtx-timer of the specific serving cell is running, transmitting a MAC CE comprising beam failure related information, and canceling the SR triggered for beam failure recovery.