NR-U Uplink Scheduling Across Multiple Bandwidth Units
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Solution Overview
Problem
The existing channel detection and uplink transmission methods in LTE-LAA are not applicable to NR-U scenarios with carriers greater than 20 MHz, as they do not account for the increased bandwidth units, leading to inefficient data transmission.
Innovation Solution
Implement channel detection on two or more bandwidth units of a carrier and transmit uplink transmissions on idle units, with network devices providing indication information for resource selection and transmission management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel detection is performed on a single carrier in LTE-LAA, then the method is simple and compatible with existing systems, but it cannot support faster data transmission in NR-U scenarios with bandwidth greater than 20 MHz
Solution Approach 1:
The patent divides the carrier into multiple bandwidth units (BWUs) for independent channel detection. Instead of treating the entire carrier as a single unit, the system segments the bandwidth into smaller chunks (e.g., 20 MHz each), allowing parallel detection and faster access to idle resources. This segmentation enables NR-U to achieve faster data transmission by utilizing multiple BWUs simultaneously while managing complexity through structured resource allocation.
2Productivity
If multiple bandwidth units are used for channel detection in NR-U, then data transmission efficiency improves, but resource allocation and management complexity increases
Solution Approach 1:
The network device pre-configures multiple bandwidth units and their characteristics before channel detection begins. By preparing the bandwidth unit structure, resource pools, and detection parameters in advance, the system reduces real-time decision complexity. The terminal equipment can then efficiently select from pre-defined idle BWUs without complex runtime calculations, improving data transmission efficiency while managing resource allocation complexity through advance preparation.
3Reliability
If channel detection is performed on multiple bandwidth units, then the probability of finding idle channels increases, but the detection time and processing overhead increase
Solution Approach 1:
Instead of requiring detection on all bandwidth units, the system performs partial detection on a subset of BWUs based on priority, historical data, or network conditions. The terminal equipment can initiate transmission on detected idle BWUs without waiting for complete detection of all units, achieving sufficient channel availability while reducing detection time and processing overhead through selective rather than exhaustive detection.
Data Source
AI summary
A terminal apparatus includes: a receiver configured to receive first indication information being related to how the terminal apparatus judges whether to transmit an uplink transmission; processor circuitry configured to perform channel detection on a plurality of bandwidth units; and a transmitter configured to perform an uplink transmission on an uplink resource on at least one of the pluralities of bandwidth units when all bandwidth units of the plurality of bandwidth units UL BWP are detected as being idle.