DCI Parsing Method for URLLC Reliability and Overhead Reduction
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Solution Overview
Problem
The challenge in improving the transmission reliability of Downlink Control Information (DCI), particularly for Ultra-Reliable and Low Latency Communication (URLLC) services in 5G NR systems, where existing methods fail to ensure high reliability and low latency in control information transmission.
Innovation Solution
A method for downlink control information transmission that involves a terminal device parsing DCI based on its format and configuration information, which includes time domain and frequency domain resource indications, CSI reports, and granularities, to optimize resource allocation and reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional DCI transmission methods are used, then the system maintains simplicity in control information handling, but the transmission reliability of DCI for URLLC services cannot achieve ultra-high reliability (99.999%) within extremely short time delay (1 ms)
Solution Approach 1:
The patent segments DCI parsing into multiple stages: first parsing based on DCI format and configuration information to determine time domain resource, frequency domain resource, and CSI report; then performing additional parsing based on resource allocation type. This segmentation allows the terminal to handle different DCI formats (compact and regular) with appropriate complexity levels, achieving high reliability for URLLC while managing parsing complexity through structured multi-stage processing
Solution Approach 2:
The patent implements dynamic DCI parsing where the terminal adapts its parsing behavior based on the detected DCI format. For compact DCI format, the terminal uses simplified parsing with first time domain resource indication information and first CSI report set. For regular DCI format, the terminal uses comprehensive parsing with second time domain resource indication information and second CSI report set. This dynamic adaptation enables the system to achieve ultra-high reliability for URLLC services while optimizing complexity based on service requirements
2Reliability
If comprehensive configuration information is provided for all DCI formats, then the system ensures high reliability transmission, but the signaling overhead increases
Solution Approach 1:
The patent applies local quality by providing different levels of configuration information for different DCI formats. For compact DCI format used in URLLC services, the terminal receives first time domain resource indication information and first CSI report set with appropriate granularity. For regular DCI format, the terminal receives second time domain resource indication information and second CSI report set. This localized optimization ensures high reliability for critical URLLC control information while reducing signaling overhead by not providing exhaustive configuration for all DCI formats
Solution Approach 2:
The patent changes configuration parameters based on DCI format type. The network configures first time domain resource indication information with specific time domain resource configurations for compact DCI format, and second time domain resource indication information with different configurations for regular DCI format. Similarly, first and second CSI report sets are configured with different parameters. This parameter differentiation enables the system to achieve high transmission reliability for URLLC services while optimizing signaling overhead by tailoring configuration granularity to service requirements
Data Source
AI summary
Embodiments of the present application provide a downlink control information (DCI) transmission method, a terminal device, and a network device. The method includes receiving, by a terminal device, first DCI sent by a network device; and parsing, by the terminal device, the first DCI according to a DCI format of the first DCI and configuration information. The configuration information corresponds to the DCI format.