New DCI Format for Flexible Multi-Cell Scheduling in NR
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Solution Overview
Problem
In New Radio (NR) systems, existing DCI formats face limitations in scheduling multiple PDSCHs/PUSCHs, requiring new formats to enhance scheduling flexibility while maintaining system efficiency, but introducing new formats leads to increased payload sizes and potential system efficiency loss due to zero-padding.
Innovation Solution
A new DCI format is designed to schedule physical channels on N service areas, allowing flexible scheduling on M service areas, where N≥2, by using a first information field with N parts, where M parts indicate valid service areas and N-M parts are preset values, improving scheduling flexibility without significant system efficiency loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a new DCI format is introduced to schedule multiple PDSCHs/PUSCHs, then scheduling flexibility is improved, but payload size increases and system efficiency deteriorates due to zero-padding
Solution Approach 1:
The DCI payload is segmented into multiple parts, each corresponding to a different service area. Instead of using a single large DCI format that schedules all N service areas, the system divides the scheduling information into N separate DCI payloads, where each payload schedules a subset of service areas. This segmentation allows the system to transmit only the necessary scheduling information for each service area, avoiding the zero-padding problem and reducing overall payload size while maintaining the ability to schedule multiple service areas.
2Adaptability or versatility
If DCI schedules physical channel on N service areas, then multi-cell scheduling capability is improved, but device complexity increases
Solution Approach 1:
The DCI design achieves multi-functionality by enabling a single DCI format to serve multiple service areas through the segmented approach. Each DCI payload can independently schedule service areas, and the system can dynamically adjust which service areas are scheduled by different DCI payloads. This universal design allows the same DCI structure to handle both single-cell and multi-cell scenarios without requiring separate specialized formats, thereby improving multi-cell scheduling capability while controlling device complexity.
Data Source
AI summary
A wireless communication method, a terminal device, and a network device are provided. The wireless communication method includes: receiving, by a terminal device, first downlink control information (DCI); the first DCI is capable of scheduling a physical channel to be transmitted on N service areas, and the first DCI actually schedules a physical channel to be transmitted on M service areas; the service areas are cells or cell groups, the N service areas comprise the M service areas, and N and M are positive integers, and N≥2.