Multi-Cell DCI Scheduling Through Shared TCI Fields
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and receiving control and data signals across multiple cells, leading to increased control overhead and reduced scheduling flexibility.
Innovation Solution
A method and apparatus for transmitting and receiving signals in a wireless communication system, where downlink control information (DCI) schedules physical downlink shared channels (PUSCHs) on different cells using a single Transmission Configuration Indication (TCI) field, and the DCI includes a field for precoding information and number of layers for each cell, allowing for efficient scheduling of multiple cells with reduced DCI overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate TCI fields are configured for each cell in multi-cell scheduling, then transmission configuration precision is improved, but DCI overhead increases
Solution Approach 1:
The patent segments cells into groups where cells within the same group share a common TCI field. This segmentation allows the system to reduce the number of TCI fields from one per cell to one per group, thereby reducing DCI overhead while maintaining configuration precision within each segment (group).
Solution Approach 2:
The patent makes a single TCI field serve multiple cells within a group, giving it multi-functionality. This universal TCI field configuration reduces the total number of fields required in DCI while still providing transmission configuration for multiple cells, thus reducing overhead without completely sacrificing configuration capability.
2Adaptability or versatility
If multiple TCI fields are used for different cells, then scheduling flexibility is improved, but DCI complexity increases
Solution Approach 1:
By segmenting cells into groups and assigning one TCI field per group, the patent reduces DCI complexity while preserving scheduling flexibility within each group. The segmentation allows the system to manage complexity at a group level rather than at the individual cell level.
Solution Approach 2:
The patent introduces a grouping dimension to organize cells, transforming the problem from managing TCI fields at the cell level to managing them at the group level. This dimensional change reduces the complexity of DCI structure while maintaining the ability to schedule multiple cells flexibly within each group.
3Measurement precision
If cell-specific precoding fields are configured, then transmission precision is improved, but control overhead increases
Solution Approach 1:
The patent segments cells into groups for precoding field configuration, where cells within the same group share common precoding parameters. This segmentation reduces the number of precoding fields from one per cell to one per group, thereby reducing control overhead while maintaining transmission precision within each segment.
Solution Approach 2:
The patent makes a single precoding field serve multiple cells within a group, allowing it to perform the function of configuring precoding for multiple cells simultaneously. This multi-functionality reduces the total number of fields required in DCI, thus reducing control overhead.
Data Source
AI summary
A method and a device for monitoring a signal in a wireless communication system, disclosed in the present specification, comprise receiving DCI for scheduling of PDSCHs or PUSCHs on different cells. Particularly, the DCI includes one or more DCI fields for the PDSCHs or the PUSCHs on different cells.