Blind Decoding Budget Splitting for Multi-Cell DCI Scheduling
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently scheduling downlink control information (DCI) for carrier aggregation (CA) wireless systems, particularly in supporting multiple DCI formats for user equipment (UE) to manage data transmissions across multiple cells, which affects throughput and reliability.
Innovation Solution
The implementation of a UE capability to support multiple DCI formats, including a first DCI format for scheduling data transmissions across multiple cells and a second DCI format with cross-carrier scheduling, allowing for the splitting of blind decoding (BD) control channel element (CCE) budgets between different DCI formats, enabling efficient blind decoding of CCEs across various search space sets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single DCI format is used for scheduling in carrier aggregation systems, then device complexity is reduced, but scheduling flexibility and adaptability across multiple cells deteriorate
Solution Approach 1:
The patent segments the blind decoding process by introducing separate blind decoding budgets for multi-cell DCI and single-cell DCI formats. This allows the UE to handle different DCI types independently with dedicated resource allocations, reducing overall complexity while maintaining scheduling flexibility for both DCI formats simultaneously
Solution Approach 2:
The patent implements dynamic adaptability by allowing the network to configure whether a cell uses multi-cell DCI or single-cell DCI based on scheduling needs. The UE can dynamically adjust its blind decoding monitoring behavior according to the configured DCI type for each cell, providing flexibility without requiring support for all DCI formats in all cells
2Reliability
If blind decoding budget is allocated for multiple DCI formats, then scheduling reliability improves, but processing overhead and complexity increase
Solution Approach 1:
The patent divides the total blind decoding budget into separate budgets for multi-cell DCI and single-cell DCI formats. This segmentation allows the UE to manage processing resources efficiently by allocating specific computational budgets to each DCI type, ensuring reliable decoding of both formats while controlling overall processing complexity through budget constraints
Solution Approach 2:
The patent changes the parameter structure by introducing a splitting factor that determines how the blind decoding budget is divided between different DCI formats. This parameter adjustment allows flexible control over processing allocation, enabling the system to optimize reliability for each DCI type while managing overall complexity through configurable budget distribution
3Adaptability or versatility
If multiple DCI formats are supported for carrier aggregation, then scheduling adaptability improves, but UE capability complexity increases
Solution Approach 1:
The patent segments UE capability reporting by separating multi-cell DCI support indication from single-cell DCI support indication. This allows the UE to report capabilities in a structured manner, indicating support for each DCI format independently, which simplifies capability management while enabling high scheduling adaptability through selective support configuration
Solution Approach 2:
The patent implements multi-functionality by designing the UE to support both multi-cell DCI and single-cell DCI formats within a unified capability framework. The UE can function in different scheduling modes depending on network configuration, providing universal adaptability across multiple DCI formats without requiring separate capability structures for each format
Data Source
AI summary
Some aspects relate to a carrier aggregation wireless system having a user equipment (UE). The UE can generate a report of a UE capability to support a first downlink control information (DCI) in a first DCI format for a cell of a plurality of cells of the wireless system and a second DCI in a second DCI format for the cell, and a report of a UE capability to support splitting a blind decoding (BD) of control channel element (CCE) (BD/CCE) budget between performing BD/CCE carrying the first DCI in the first DCI format, and performing BD/CCE carrying the second DCI in the second DCI format. The first DCI in the first DCI format can schedule data transmissions for a set of multiple cells. The UE may perform BD/CCE carrying the first DCI in the first DCI format, and perform BD/CCE carrying the second DCI in the second DCI format.