5G NR Slot Aggregation Conflict Resolution
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Solution Overview
Problem
The 5G NR system faces challenges in supporting slot aggregation technology within a flexible slot structure, leading to inefficiencies in data transmission efficiency and reliability, particularly due to conflicts between slot structures configured by the network device and those indicated by dynamic downlink control information.
Innovation Solution
A communications method that determines whether a time unit is an aggregation time unit based on the transmission direction of sub-time units, as indicated by first and second indication information, allowing for flexible slot configuration and improving data transmission efficiency by identifying and optimizing aggregation slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slot aggregation technology is implemented in 5G NR system, then data transmission coverage and reliability are enhanced, but conflict arises between slot structures configured by network device and those indicated by dynamic downlink control information
Solution Approach 1:
The patent segments the slot structure into multiple components: format information indicating transmission direction of each symbol, first indication information from dynamic downlink control information, and second indication information from slot structure configuration. This segmentation allows each component to be independently determined and compared, resolving the conflict between different indication sources.
Solution Approach 2:
The patent applies local quality by determining transmission direction on a per-symbol basis within each slot. The format information provides transmission direction for each symbol individually, allowing the terminal device to identify specific symbols that conflict with dynamic indications and exclude only those from aggregation, rather than rejecting entire slots.
2Reliability
If slot aggregation is used to improve data transmission reliability, then more resources are occupied and coverage is enhanced, but latency-sensitive data transmission becomes unfavorable
Solution Approach 1:
The patent applies partial action by performing slot aggregation only for symbols that do not conflict between format information and dynamic indication information. Instead of aggregating entire slots or all symbols, the method selectively aggregates only the compatible symbols, thereby improving reliability for non-latency-sensitive data while avoiding excessive aggregation that would harm latency-sensitive transmissions.
3Adaptability or versatility
If flexible slot structure is supported in 5G NR system, then communication transmission flexibility is improved, but challenge arises in supporting slot aggregation technology
Solution Approach 1:
The patent creates a universal determination method that works across different slot structures and transmission scenarios. The terminal device uses a unified approach: obtaining format information, obtaining first indication information from dynamic downlink control information, obtaining second indication information from slot structure configuration, and determining transmission direction by comparing these sources. This universal method supports both flexible slot structures and slot aggregation technology simultaneously.
Data Source
AI summary
A communications method includes: obtaining first indication information and format information; and determining, based on a transmission direction that is of a sub-time unit in a time unit and that is indicated by the first indication information and a transmission direction that is of the sub-time unit and that is indicated by the format information, whether the time unit is an aggregation time unit. It is determined, based on the transmission direction that is of the sub-time unit in the time unit and that is configured in the first indication information and the transmission direction that is of the sub-time unit and that is configured in the format information, whether the time unit is an aggregation time unit.