Cross-Cell DCI Mapping for Multi-Cell Scheduling Efficiency
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently scheduling data transmission across multiple cells, particularly in scenarios where different communication systems coexist, leading to limited control resources and reduced resource utilization.
Innovation Solution
A method and apparatus for sending downlink control information (DCI) in a first cell to schedule data transmission in at least two second cells, utilizing a scheduling information field with fixed or flexible configurations to indicate multiple cells, and employing high-layer signaling for mapping relationships to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If downlink control information (DCI) is sent to schedule data transmission in multiple cells, then resource utilization is improved, but control signaling overhead increases
Solution Approach 1:
The patent combines scheduling information for multiple second cells into a single DCI message transmitted on the first cell. The DCI includes a first indication information field that simultaneously indicates multiple second cells, merging what would traditionally be separate scheduling messages into one unified control signal, thereby reducing control signaling overhead while maintaining the ability to schedule multiple cells
Solution Approach 2:
The first cell is configured to perform both data transmission and control signaling functions. The first cell transmits DCI that schedules data transmission across multiple second cells, making the first cell a universal resource that serves both as a data bearer and a control channel, thereby improving overall resource utilization
2Measurement precision
If separate DCI is sent for each cell, then control signaling precision is maintained, but device complexity increases
Solution Approach 1:
The patent segments the indication information for multiple second cells into a structured format within the DCI. The first indication information is divided into multiple second indication informations, each corresponding to a specific second cell. This segmentation allows precise scheduling of each cell while maintaining a unified DCI structure, balancing precision with reduced complexity
Solution Approach 2:
The patent introduces high-layer signaling as an intermediary mechanism to configure the mapping relationship between the first indication information and the second cells. This intermediary layer establishes the correspondence rules in advance, allowing the DCI to efficiently schedule multiple cells without requiring complex real-time processing, thus reducing system complexity while maintaining scheduling precision
Data Source
AI summary
A transmission scheduling method includes: sending in a first cell, downlink control information (DCI) for scheduling data transmission in at least two second cells.