DCI Transmission Method for Multi-Cell Scheduling in 5G NR
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, especially where 5G new radio and LTE systems coexist, the limited control resources for the 5G new radio system lead to increased detection complexity for terminals due to the need to detect multiple types of downlink control information (DCI) for scheduling data transmission in one or multiple cells, resulting in reduced resource utilization.
Innovation Solution
The introduction of two types of DCI, where one type carries instructions for scheduling data transmission in one cell and another for scheduling in at least two cells, allowing for classification and efficient detection, reducing detection complexity and overhead, and enabling improved resource utilization by allowing scheduling in multiple cells with a single DCI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of DCI are used for scheduling data transmission in one or multiple cells, then the scheduling flexibility and resource utilization are improved, but the detection complexity for terminals increases
Solution Approach 1:
The DCI formats are segmented into two distinct types: first-type DCI for scheduling data transmission in one cell, and second-type DCI for scheduling data transmission in multiple cells. This segmentation allows terminals to detect and process only the relevant DCI type based on their specific needs, thereby reducing detection complexity while maintaining scheduling flexibility for both single-cell and multi-cell scenarios
Solution Approach 2:
The second-type DCI is designed with multi-functionality to schedule data transmission across multiple cells simultaneously. This universal DCI format can handle various multi-cell scheduling scenarios (such as cross-carrier scheduling and multi-cell group scheduling) with a single unified format, reducing the need for terminals to detect multiple specialized DCI formats and thereby lowering detection complexity
2Productivity
If multiple types of DCI are used for scheduling data transmission in one or multiple cells, then the resource utilization is improved, but the control signaling overhead increases
Solution Approach 1:
The patent merges the scheduling functions for single-cell and multi-cell data transmission into two streamlined DCI formats. By combining related scheduling parameters and functions into these unified formats, the patent reduces the total number of separate control messages needed, thereby decreasing control signaling overhead while maintaining efficient resource utilization across multiple cells
Solution Approach 2:
The second-type DCI format serves multiple purposes by enabling various multi-cell scheduling scenarios with a single unified format. This multi-functional design reduces the proliferation of specialized DCI formats, thereby reducing overall control signaling overhead while maintaining the ability to efficiently allocate resources across multiple cells
Data Source
AI summary
A Downlink Control Information (DCI) transmission method, performed by a terminal, is provided. In the method, the terminal receives DCI, in which a type of the DCI includes a first type or a second type. DCI of the first type carries a control instruction for scheduling data transmission in one cell. DCI of the second type carries a control instruction for scheduling data transmission in at least two cells.