Configured Grant HARQ Scheduling for Multiple PUSCH Periods
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Solution Overview
Problem
Existing NR specifications lack detailed guidelines for configuring multiple uplink and downlink transmissions within a single period in higher frequency ranges (>52.6 GHz), particularly for semi-persistent scheduling (SPS) and configured grant (CG) operations, which are essential for efficient data transmission in 5G New Radio (NR) networks.
Innovation Solution
The solution involves configuring semi-persistent scheduling (SPS) and configured grant (CG) operations to support multiple PDSCH and PUSCH transmissions within a single period by defining parameters such as the number of hybrid automatic repeat request (HARQ) processes, HARQ process IDs, and time domain resource allocations, along with specific DCI designs to manage these transmissions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PDSCH/PUSCH transmissions are scheduled in a single SPS/CG period, then throughput efficiency is improved, but HARQ process management complexity increases
Solution Approach 1:
The patent segments the HARQ process management by introducing separate HARQ process ID fields for different transmission types (PDSCH and PUSCH) within the same SPS/CG period. This allows independent tracking and management of HARQ processes for each transmission, reducing the complexity of managing multiple transmissions simultaneously while maintaining high throughput efficiency.
Solution Approach 2:
The patent implements dynamic HARQ process ID assignment where the network can flexibly allocate HARQ process IDs based on the specific transmission configuration. This dynamic approach allows the system to adapt HARQ process management to the actual number and type of transmissions in each period, optimizing both efficiency and manageability.
2Productivity
If higher subcarrier spacings (SCS) are used, then spectral efficiency is improved, but the number of slots per frame increases
Solution Approach 1:
The patent utilizes periodic SPS/CG configurations that repeat every N slots to manage the increased number of slots per frame. By establishing periodic transmission patterns, the system can efficiently allocate resources across multiple slots without requiring complex one-time configurations, maintaining spectral efficiency while simplifying frame management.
Solution Approach 2:
The patent applies preliminary action by configuring SPS/CG parameters in advance, including pre-defining the number of HARQ processes and transmission patterns before the actual data transmission begins. This allows the system to handle the increased slot count proactively with predetermined resource allocation strategies, reducing real-time processing complexity.
3Productivity
If multiple UL/DL transmissions are scheduled in a single period, then resource utilization is improved, but specification complexity increases
Solution Approach 1:
The patent creates a universal SPS/CG framework that can handle multiple UL and DL transmissions of different types within a single period using a unified configuration approach. The same basic configuration mechanism works for both PDSCH and PUSCH transmissions, as well as for different transmission directions, reducing specification complexity while maximizing resource utilization.
Solution Approach 2:
The patent employs parameter changes by allowing flexible configuration of HARQ process IDs, transmission directions, and resource allocations through modified SPS/CG parameters. This enables the system to adapt to various transmission scenarios (single UL/DL, multiple UL/DL, different directions) by simply changing parameters rather than requiring separate specification for each case.
Data Source
AI summary
A user equipment (UE) is configured to receive from a base station a semi-persistent scheduling (SPS) configuration for physical downlink shared channel (PDSCH) transmissions wherein multiple PDSCHs are transmitted within a single period of the SPS, the SPS configuration including a parameter for a number of hybrid automatic repeat request (HARQ) processes associated with the SPS configuration, receive from the base station a downlink control information (DCI) transmission for activating the SPS configuration, the DCI including a HARQ process ID for one of the PDSCH transmissions in the SPS configuration, wherein the UE determines a maximum number of PDSCH transmissions allowed within the single period based on the parameter for the number of HARQ processes associated with the SPS configuration, validate the DCI to determine time domain resources to use for the PDSCH transmission and receive from the base station the multiple PDSCH transmissions within the single SPS period.