Multi-Cell DCI Scheduling With Flexible TDRA Fields
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in transmitting and receiving control and data signals across multiple cells, leading to increased DCI overhead and reduced scheduling flexibility.
Innovation Solution
A method and apparatus for transmitting and receiving signals in a wireless communication system that involves scheduling physical downlink and uplink shared channels across multiple cells using multi-cell DCI, employing various configurations of time domain resource assignments to optimize DCI field settings, such as shared-cell-common, shared-state-extension, separate, and shared-reference-cell methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate DCI is used for scheduling PDSCHs or PUSCHs on different cells, then scheduling flexibility is improved, but DCI overhead increases
Solution Approach 1:
The patent combines multiple DCI messages into a single unified DCI structure that schedules PDSCHs or PUSCHs across multiple cells simultaneously. This merging approach reduces the total number of DCI messages transmitted while maintaining the ability to independently configure time domain resource assignments for each cell, thus reducing DCI overhead while preserving scheduling flexibility.
Solution Approach 2:
The unified DCI structure is designed to serve multiple cells with different configurations through a universal framework. It includes cell-specific time domain resource assignment fields that allow each cell to have customized scheduling parameters while being controlled by a single DCI message, enabling one DCI to perform the function of multiple separate DCI messages.
2Adaptability or versatility
If multiple DCI are used for scheduling across multiple cells, then scheduling flexibility is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple DCI scheduling operations into a single DCI message that simultaneously schedules resources across multiple cells. This consolidation reduces the number of DCI messages the UE must decode and process, thereby reducing device complexity while maintaining the scheduling flexibility needed for multi-cell operations.
Solution Approach 2:
The unified DCI structure is segmented into cell-specific fields that allow independent configuration for each cell. This segmentation enables the UE to process each cell's scheduling parameters separately within a single DCI message, reducing overall processing complexity compared to handling multiple separate DCI messages while preserving per-cell scheduling flexibility.
3Adaptability or versatility
If cell-specific TDRA is configured for each cell, then scheduling flexibility is improved, but DCI size increases
Solution Approach 1:
The DCI structure uses a universal time domain resource assignment framework that can accommodate multiple cells with different configurations. By designing the DCI to include configurable cell-specific fields that are selectively activated based on network requirements, the system achieves universal applicability across different cell configurations without always incurring the full overhead of cell-specific TDRA for all cells.
Solution Approach 2:
The patent applies cell-specific time domain resource assignment configurations only where needed rather than uniformly across all cells. This local quality approach allows the DCI size to be dynamically adjusted based on the actual scheduling requirements of each cell, maintaining scheduling flexibility for cells that need it while minimizing DCI overhead for cells with simpler requirements.
Data Source
AI summary
A method and a device for transmitting/receiving signals in a wireless communication system, disclosed in the present specification, comprise receiving DCI for scheduling PDSCHs or PUSCHs in different cells. Specifically, the DCI includes one or more TDRA fields for the PDSCHs or the PUSCHs in the different cells.