HARQ Process ID Determination for Multiple PUSCH Transmission Occasions
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Solution Overview
Problem
Current 5G New Radio (NR) technology lacks efficient mechanisms for configuring multiple Physical Uplink Shared Channel (PUSCH) transmission occasions within a single configured grant (CG) period, leading to suboptimal system resource utilization and incompatibility with enhanced HARQ process ID determination mechanisms that support multiple transmission occasions.
Innovation Solution
A method and apparatus for a UE to configure a Hybrid Automatic Repeat Request (HARQ) process identification (ID) determination mechanism, using parameters such as total-NrofOccasions-PerCGPeriod and time-Gap-MultipleOccasions, to identify HARQ process IDs for multiple PUSCH transmission occasions, allowing for flexible positioning patterns like uniform time gaps, back-to-back slots, and back-to-back symbols, enabling efficient uplink transmissions without dynamic lower-layer triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single PUSCH transmission occasion is configured per CG period, then the system maintains simple HARQ process ID determination, but resource utilization efficiency deteriorates
Solution Approach 1:
The configured grant period is segmented into multiple PUSCH transmission occasions (e.g., 2, 3, or 4 occasions per CG period), allowing the uplink resources to be divided into distinct transmission opportunities. This segmentation enables better resource utilization by distributing transmissions across multiple occasions while maintaining manageable HARQ process ID determination through structured parameterization.
Solution Approach 2:
The system dynamically adapts the number of PUSCH transmission occasions per CG period based on traffic requirements and channel conditions. By configuring flexible numbers of occasions (2, 3, or 4) and adjusting time gaps between them, the system optimizes resource utilization dynamically while the HARQ process ID determination mechanism adapts to the configured number of occasions through parameter-based calculation.
2Productivity
If multiple PUSCH transmission occasions are configured per CG period, then resource utilization efficiency improves, but HARQ process ID determination compatibility deteriorates
Solution Approach 1:
The HARQ process ID determination mechanism uses configurable parameters (such as the number of PUSCH occasions per CG period, time gaps between occasions, and occasion indices) to adapt to different transmission configurations. By changing these parameters based on the configured number of occasions, the system maintains compatibility across different scenarios while supporting multiple transmission occasions per CG period.
Solution Approach 2:
The HARQ process ID determination mechanism is designed to be universal and compatible across different configurations of PUSCH transmission occasions. The same determination mechanism can handle 2, 3, or 4 occasions per CG period by adjusting its input parameters, making it versatile and compatible without requiring separate mechanisms for different configurations.
3Adaptability or versatility
If transmission occasions are positioned with uniform time gaps, then scheduling flexibility improves, but time resource efficiency deteriorates
Solution Approach 1:
The time gap between PUSCH transmission occasions is dynamically configured based on traffic patterns and channel conditions. Instead of always using uniform time gaps, the system can adapt the gap duration to minimize idle time while maintaining scheduling flexibility. This allows the system to optimize time resource efficiency by reducing unnecessary gaps when traffic is continuous while preserving the ability to use uniform gaps when scheduling flexibility is prioritized.
Data Source
AI summary
In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The method may be performed by a UE. In certain configurations, the UE configures a Hybrid Automatic Repeat Request (HARQ) process identification (ID) determination mechanism for uplink transmission according to a plurality of parameters. The UE obtains, based on the HARQ process ID determination mechanism and the parameters, a HARQ process ID for each of a plurality of PUSCH transmission occasions. The UE performs an uplink transmission with the PUSCH transmission occasions identified by the HARQ process IDs. The parameters in the HARQ process ID determination mechanism include a parameter total-NrofOccasions-PerCGPeriod representing a total number of available PUSCH transmission occasions in a single configured grant (CG) period, and a parameter time-Gap-MultipleOccasions representing a time gap between two successive PUSCH transmission occasions.