DRX Group Configuration for Multi-Cell Energy and Complexity Trade-offs
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Solution Overview
Problem
In 5G wireless communication systems, managing discontinuous reception (DRX) and transmission (DTX) across multiple serving cells leads to excessive complexity for user equipment (UE), increasing energy consumption and operational challenges due to the need for precise timing and parameter configuration for each cell.
Innovation Solution
The method involves configuring cell-specific active times into DRX groups, allowing for the activation and deactivation of CELL-DTX and CELL-DRX, where the base station transmits or receives a limited set of signals during specific time periods, reducing energy consumption and simplifying UE management by consolidating cell-specific operations into DRX group-specific active times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cell-specific DRX operation is managed for each serving cell, then network energy saving is achieved, but UE complexity increases excessively
Solution Approach 1:
The patent combines multiple cell-specific DRX configurations into a single DRX group configuration. Instead of managing DRX parameters individually for each serving cell, the network configures a DRX group that encompasses multiple cells, allowing unified management of discontinuous reception operations across aggregated cells, thereby reducing UE complexity while maintaining energy saving benefits
Solution Approach 2:
The DRX group configuration serves multiple serving cells simultaneously with a single set of DRX parameters. This universal configuration approach allows the same DRX settings to be applied across multiple cells, eliminating the need for separate DRX management for each cell and reducing the overall complexity burden on the UE
2Adaptability or versatility
If multiple serving cells are configured with DRX, then service capability is enhanced, but timing synchronization difficulty increases
Solution Approach 1:
The patent merges the timing management of multiple serving cells into a unified DRX group structure. By grouping cells that share common timing characteristics and applying unified DRX parameters, the system simplifies timing synchronization across multiple cells while preserving the ability to provide diverse services through carrier aggregation
3Loss of energy
If DRX parameters are configured for each serving cell, then energy saving is optimized, but operational complexity increases
Solution Approach 1:
The patent combines multiple cell-specific DRX configurations into a single DRX group configuration. Instead of managing DRX parameters individually for each serving cell, the network configures a DRX group that encompasses multiple cells, allowing unified management of discontinuous reception operations across aggregated cells, thereby reducing UE complexity while maintaining energy saving benefits
Solution Approach 2:
The patent applies DRX grouping selectively based on cell characteristics and traffic patterns. Rather than forcing all cells into single unified management, the system allows partial grouping where cells with similar DRX requirements are combined, while maintaining individual control where necessary, thus optimizing the balance between energy saving and operational simplicity
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 downlink control information, wherein the downlink control information comprises two or more blocks, determining a first block for the first serving cell based on the first parameter for the first serving cell, and deactivating cell discontinuous trans mission (DTX) of the first serving cell in case that a first part of the first block is set to a specific value. Size of the first parameter for the first serving cell is configurable based on a second parameter.