Wireless Node DCI Scheduling for Multi-Cell PUSCH
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Solution Overview
Problem
In 5G NR systems, managing Downlink Control Information (DCI) signaling for scheduling physical layer channels across multiple serving cells is inefficient, leading to ambiguity, increased hardware complexity, and signaling overhead.
Innovation Solution
A method and apparatus for wireless communication that involves receiving and transmitting DCI to schedule PUSCH on a target cell set, where the DCI's target domain set is determined by the configuration of RRC signaling specific to each cell, ensuring consistent configuration across cells to reduce ambiguity and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single DCI signaling is used to schedule PUSCH across multiple serving cells, then DCI overhead is reduced, but ambiguity in DCI interpretation increases
Solution Approach 1:
The patent applies local quality by allowing different RRC configuration parameters to be applied to different cells within the target cell set. Specifically, when RRC configurations differ across cells, the DCI interpretation adapts locally to each cell's configuration rather than using a uniform interpretation, thus resolving the ambiguity while maintaining reduced DCI overhead.
Solution Approach 2:
The patent introduces dynamic adaptation in DCI interpretation based on RRC configuration states. The interpretation of DCI fields dynamically changes depending on whether RRC configurations are consistent or inconsistent across cells. This dynamic mechanism allows the system to switch between unified and cell-specific interpretation modes, resolving ambiguity without increasing DCI overhead.
2Productivity
If DCI scheduling is extended to multiple serving cells, then scheduling efficiency improves, but device complexity increases
Solution Approach 1:
The patent makes the DCI signaling universal across multiple serving cells by enabling a single DCI to schedule PUSCH on multiple cells simultaneously. The DCI structure and interpretation rules are designed to handle multi-cell scheduling in a unified manner, improving scheduling efficiency while avoiding the need for separate DCI structures for each cell, thus limiting the increase in device complexity.
Solution Approach 2:
The patent manages device complexity by changing interpretation parameters of DCI fields based on RRC configuration states rather than increasing the number of DCI fields. When RRC configurations are consistent across cells, unified interpretation parameters are used; when inconsistent, cell-specific parameters are applied. This parameter-based approach maintains scheduling efficiency while controlling hardware complexity.
3Reliability
If RRC configuration consistency is enforced across all cells, then DCI interpretation reliability improves, but signaling flexibility decreases
Solution Approach 1:
The patent segments the target cell set into groups based on RRC configuration consistency. Cells with consistent RRC configurations are handled with unified DCI interpretation, while cells with inconsistent configurations receive cell-specific interpretation. This segmentation allows the system to maintain reliability for consistent configurations while preserving flexibility for inconsistent ones.
Solution Approach 2:
The patent introduces dynamic adaptation in DCI interpretation based on RRC configuration states. The interpretation mode dynamically switches between unified (for consistent configurations) and cell-specific (for inconsistent configurations). This dynamic mechanism maintains configuration reliability where applicable while preserving signaling flexibility where needed.
Data Source
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AI summary
The present application discloses a method and apparatus for a node used for wireless communication. A first receiver receives a plurality of pieces of RRC signaling, and receives first DCI, wherein the first DCI is used for scheduling a PUSCH on a target cell set, and the target cell set comprises a plurality of cells; and a first transmitter sends the PUSCH on each cell in the target cell set, wherein a first target domain set in the first DCI is applied to the plurality of cells in the target cell set, the first target domain set in the first DCI depends on the configuration of at least one piece of RRC signaling among the plurality of pieces of RRC signaling, the plurality of pieces of RRC signaling are respectively configured for the plurality of cells in the target cell set, and the configurations of the plurality of pieces of RRC signaling are expected to be the same.