Multi-Cell Data-Channel Scheduling With Unified DCI And TDRA
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently scheduling multiple downlinks and uplinks across multiple cells, which hinders the smooth provision of various services in advanced mobile communication systems.
Innovation Solution
A method and device for performing multi-cell scheduling through downlink control information, utilizing time domain resource allocation (TDRA) configuration and cell index indicators to facilitate data channel scheduling across multiple cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple separate DCI messages are used to schedule data channels in multiple cells, then each data channel can be scheduled independently, but the control signaling overhead and scheduling complexity increase significantly
Solution Approach 1:
The patent combines multiple separate DCI messages into a single unified DCI message that can schedule data channels across multiple cells simultaneously. This is achieved by defining a new DCI format that includes multiple cell index indicators and multiple time domain resource allocation fields, allowing one DCI to replace what would traditionally require multiple separate DCI messages, thereby reducing control signaling overhead and simplifying the scheduling process
Solution Approach 2:
The unified DCI message is designed with multi-functional capabilities to handle scheduling for multiple cells and multiple data channels within a single message structure. The DCI includes flexible fields such as cell index indicators and time domain resource allocation fields that can be configured to accommodate different cell combinations and resource allocation scenarios, making the DCI structure universally applicable across various multi-cell scheduling situations
2Loss of energy
If a unified DCI message schedules multiple data channels across multiple cells, then control signaling overhead is reduced, but the DCI message size and interpretation complexity increase
Solution Approach 1:
The unified DCI message is segmented into distinct functional fields, each with a specific purpose. The DCI includes a cell index indicator field that identifies which cells are being scheduled, separate time domain resource allocation fields for each scheduled data channel, and other specialized fields for specific scheduling parameters. This segmentation allows the terminal to parse and interpret each field independently, reducing the overall interpretation complexity despite the increased message size
Solution Approach 2:
The patent introduces intermediary fields within the DCI structure that act as mediators between the scheduling decisions and the actual resource allocations. These intermediary fields include the cell index indicators that map logical cell identifiers to physical cell resources, and the time domain resource allocation fields that translate abstract resource requirements into specific time-frequency resources, thereby simplifying the terminal's interpretation process
3Adaptability or versatility
If separate scheduling is performed for each cell, then scheduling flexibility is maintained, but the overall system efficiency and resource utilization decrease
Solution Approach 1:
The unified DCI message structure is designed to be dynamic and adaptable to different scheduling scenarios. The DCI can flexibly indicate different combinations of cells, different numbers of data channels, and different resource allocation patterns based on current network conditions and service requirements. This dynamic capability allows the system to maintain scheduling flexibility while achieving improved overall efficiency through coordinated multi-cell scheduling
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. The present disclosure provides a method and a device for scheduling multi-cell transmission via a single piece of DCI in a wireless communication system.