Multi-Cell PUSCH Scheduling Through Adaptive DCI Field Sets
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Solution Overview
Problem
In 5G NR systems, the large amount of DCI signaling required for eMBB scheduling on physical layer channels leads to overhead issues, and determining the fields included in DCI is crucial for efficient resource allocation across multiple serving cells.
Innovation Solution
A method for wireless communication that involves receiving a target RRC signaling set and DCI, with the DCI scheduling PUSCH in each cell of a cell set, where the inclusion of specific fields in the DCI depends on the number of cells and their configurations, reducing hardware complexity and signaling overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a large amount of DCI signaling is sent to complete scheduling on physical layer channels, then scheduling capability is improved, but signaling overhead increases
Solution Approach 1:
The patent combines scheduling information for multiple serving cells into a single DCI signaling message. The DCI includes a cell indicator field that points to a set of cells, and a unified scheduling field that applies to all cells in the set, thereby merging multiple scheduling operations into one signaling action and reducing overhead.
Solution Approach 2:
The DCI signaling structure is designed to serve multiple serving cells simultaneously. The unified scheduling field can be interpreted differently based on the cell indicator, allowing the same DCI to perform scheduling functions across multiple cells with different configurations, thereby achieving multi-functionality.
2Measurement precision
If DCI includes field sets for all cells, then scheduling precision is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by making the DCI structure adaptable to the specific cell being scheduled. The field sets in the DCI are selectively included or excluded based on the cell indicator value and the corresponding cell configuration. This allows the DCI to have the necessary precision for each cell while avoiding unnecessary fields that would increase complexity.
Solution Approach 2:
The DCI structure is made dynamic rather than static. The presence or absence of specific field sets in the DCI changes based on the cell indicator and configuration parameters. This dynamic adaptation allows the system to maintain scheduling precision for the target cell while minimizing the overall DCI structure complexity by excluding irrelevant fields.
3Quantity of substance
If single piece of DCI signaling is used for multiple cells, then signaling overhead is reduced, but field determination complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the relationship between cell indicators and field sets before the actual scheduling occurs. The system maintains a configuration that maps cell indicator values to specific field set combinations, allowing the receiver to automatically determine which fields are relevant without complex real-time analysis, thus reducing field determination complexity.
Solution Approach 2:
The cell indicator field acts as an intermediary that simplifies field determination. Instead of directly analyzing which fields are needed for each cell, the cell indicator serves as a mediator that points to pre-defined field set configurations, making the determination process simpler and more systematic.
Data Source
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AI summary
The present application discloses a method and device used in a node for wireless communication. A first receiver receives a target RRC signaling set and receives target DCI, and a first transmitter transmits a PUSCH on each cell in a first cell set, wherein the target DCI is used for scheduling the PUSCH that is transmitted on each cell in the first cell set; the target RRC signaling set comprises first RRC signaling, the first RRC signaling is configured for a target cell, and the target cell is one cell in the first cell set; whether the target DCI comprises a target domain set is related to the number of cells comprised in the first cell set; and when the number of cells comprised in the first cell set is 1, whether the target DCI comprises a target domain set depends on the configuration of the first RRC signaling.