NR Time-Domain Resource Sets for Consistent DCI Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the current NR system, time domain resources configured by RRC signaling may include inapplicable resources for certain DCI formats, leading to inconsistent resource selection between terminal devices and base stations, which affects communication reliability.
Innovation Solution
A method for determining consistent time domain resource sets by terminal devices and network devices using a shared rule, allowing for proper resource selection based on DCI formats and repetition manners, reducing signaling overheads through direct indication and predefined resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station configures a time domain resource set by using RRC signaling, then the time domain resource can be dynamically indicated, but some time domain resources in the table may be inapplicable to DCI in a specific format, leading to inconsistent resource selection between terminal device and base station
Solution Approach 1:
The time domain resource table is segmented into multiple sub-tables, with each sub-table corresponding to a specific DCI format (e.g., first time domain resource table for DCI format 0_1, second time domain resource table for DCI format 0_2). This segmentation ensures that only applicable resources are provided for each DCI format, eliminating inconsistency in resource selection between terminal device and base station.
2Reliability
If multiple time domain resource tables are configured for different DCI formats, then resource applicability is improved, but the complexity of determining the correct resource set increases
Solution Approach 1:
A mapping relationship is introduced as an intermediary between DCI formats and time domain resource tables. The mapping relationship pre-establishes which time domain resource table corresponds to which DCI format, enabling the terminal device to directly determine the correct resource set without complex analysis. This intermediary structure simplifies the resource determination process while maintaining reliability.
3Productivity
If cross-boundary time domain resources are included in the time domain resource table, then resource utilization is improved, but these resources cannot be used with slot-level time domain repetition manner
Solution Approach 1:
Different time domain resource tables are created with different local qualities (characteristics) suited to different DCI formats and repetition manners. The first time domain resource table includes resources suitable for DCI format 0_1, while the second time domain resource table includes resources suitable for DCI format 0_2. Each table is locally optimized for its corresponding DCI format's requirements, ensuring compatibility with the appropriate repetition manner.
Data Source
AI summary
A communication method and a communications apparatus are provided. The method includes: A network device configures a first time domain resource set of a first DCI format and a second time domain resource set of a second format for a terminal device; and the terminal device determines, based on a time domain repetition manner of grant free scheduling, a time domain repetition manner of the first DCI format, and a time domain repetition manner of the second format, an available third time domain resource set from the first time domain resource set and the second time domain resource set, and then receives and sends data by using a time domain resource in the third time domain resource set.