Cross-Cell DCI Configuration for Lower NR Blind Detection Complexity
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Solution Overview
Problem
In New Radio (NR) systems, scheduling one cell or carrier by different cells or carriers increases the complexity of blind detection due to varying control configurations and bit quantities in control information, leading to inefficiencies.
Innovation Solution
The method involves determining control information for a first serving cell based on second control information, base station configurations, and terminal capabilities to align scheduling and resource allocation, reducing complexity by ensuring consistent DCI sizes through shared TCI and CIF fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If one cell or carrier is scheduled by different cells or carriers, then overheads of physical downlink control channel can be effectively reduced, but complexity of blind detection by terminal increases due to different control configurations and bit quantities
Solution Approach 1:
The patent applies homogeneity by ensuring that Downlink Control Information (DCI) formats used for scheduling across different serving cells have uniform size and structure. Specifically, the patent configures DCI formats to include the same number of bits for fields such as TCI (Transmission Configuration Indication) and CIF (Carrier Indication Field), regardless of which serving cell performs the scheduling. This uniformity allows the terminal to use a consistent blind detection process across all scheduling scenarios, thereby reducing detection complexity while maintaining the ability to schedule one cell by multiple other cells.
2Adaptability or versatility
If control configurations of different scheduling cells or carriers are different, then flexibility in scheduling is improved, but complexity of blind detection by terminal increases due to varying content and bit quantities in control information
Solution Approach 1:
The patent employs parameter changes by dynamically adjusting the content and bit allocation of DCI fields based on scheduling requirements while maintaining overall DCI size consistency. For example, when a serving cell is scheduled by another serving cell, the patent configures the DCI to include appropriate TCI and CIF fields with specific bit lengths that match the scheduling context. The base station can configure different parameter values for different scheduling scenarios, but ensures that the total DCI size remains uniform, thus providing scheduling flexibility without increasing terminal detection difficulty.
Data Source
AI summary
A control information configuration method and apparatus, a control information content determining method and apparatus, and an electronic device, are provided. The control information configuration method is performed by a first serving cell, the first serving cell is scheduled by a second serving cell, and the method includes: sending first control information to a terminal, where the first control information is determined according to at least one of the following: second control information sent on the second serving cell to the terminal; a configuration from a base station on the terminal; a characteristic of the terminal; and a capability supported by the terminal.