Cross-Numerology Scheduling Timing Alignment in NR Systems
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Solution Overview
Problem
In New Radio (NR) access systems, cross-numerology scheduling is challenging due to differences in subcarrier spacing and cyclic prefix lengths across various numerologies, leading to interference issues at resource block boundaries.
Innovation Solution
A method for determining time positions and intervals between communications using different numerologies, where the first time position is calculated based on a reference numerology, allowing for synchronization and scheduling adjustments to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If cross-numerology scheduling is implemented to support multiple numerologies in NR systems, then adaptability and versatility are improved, but interference occurs at resource block boundaries due to differences in subcarrier spacing and cyclic prefix lengths
Solution Approach 1:
The patent applies local quality by configuring different cyclic prefix lengths for different resource blocks based on their specific numerology requirements. Each resource block can have its own CP configuration (first CP length for first numerology, second CP length for second numerology), allowing local adaptation to eliminate interference at boundaries while maintaining overall system versatility.
2Adaptability or versatility
If different cyclic prefix lengths are used for different numerologies, then adaptability is improved, but timing alignment becomes complex and difficult to manage
Solution Approach 1:
The patent applies preliminary action by pre-configuring the timing relationships and cyclic prefix parameters through higher-layer signaling before actual data transmission. The network device determines and notifies the user equipment of the appropriate CP lengths and timing offsets in advance, allowing the UE to properly align reception timing without real-time complexity.
Solution Approach 2:
The patent uses higher-layer signaling as an intermediary to manage the complexity of timing alignment. The signaling mechanism acts as a mediator that conveys the necessary timing and CP configuration information from the network to the user equipment, abstracting away the complex timing calculations and providing a simplified interface for cross-numerology scheduling.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C~2D
AI summary
Embodiments of the disclosure provide a method and device for cross-numerology scheduling. The method comprises： determining at least one of a first time position associated with a first communication and a time interval between the first communication and a second communication， the first communication using a first numerology， the second communication using a second numerology and being performed in response to the first communication.