HARQ Process ID Determination for 5G Multi-Scheduling

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Solution Overview

Problem

In the context of 5G wireless communication systems, particularly above 52.6 GHz carrier frequencies, existing technologies face challenges in determining Hybrid Automatic Repeat Request (HARQ) process IDs for multi-PDSCH and multi-PUSCH scheduling, especially when collisions occur due to dynamic slot formats and semi-static UL/DL configurations, leading to inconsistencies in HARQ process ID management.

Innovation Solution

The proposed solution provides mechanisms for determining HARQ process IDs in scenarios of multi-PDSCH and multi-PUSCH scheduling, including handling conflicts between dynamic grant and semi-persistent scheduling, and implementing type 3 HARQ-ACK codebooks with time bundling to reduce payload and improve error handling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If multi-PDSCH and multi-PUSCH scheduling is implemented to maintain peak data rate, then productivity is improved, but device complexity increases due to HARQ process ID management conflicts

Engineering Contradiction:

Improvepeak data rateVSAvoidHARQ process ID management

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements dynamic HARQ process ID determination by introducing a formula that adapts the HARQ process ID based on the actual PDSCH reception occasion index and the number of PDSCHs scheduled. This dynamic approach allows the system to handle multi-PDSCH scheduling flexibly without fixed assignments, resolving conflicts between multiple PDSCHs and their corresponding HARQ processes while maintaining peak data rate performance.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If HARQ process ID is determined by fixed formula for multi-PDSCH scheduling, then ease of operation is improved, but reliability deteriorates due to collisions with dynamic slot formats

Engineering Contradiction:

ImproveHARQ process ID determinationVSAvoidHARQ process ID collision handling

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent changes the parameters used for HARQ process ID determination from fixed values to dynamic parameters including the PDSCH reception occasion index and the total number of PDSCHs scheduled. By using these variable parameters in the HARQ process ID formula, the system can adapt to different slot formats and scheduling configurations, preventing collisions while maintaining operational simplicity.

Inventive Principle:

Principle #35Parameter changes

3Speed

If symbol and slot duration is reduced for high carrier frequency operation, then speed is improved, but device complexity increases due to scheduler constraints

Engineering Contradiction:

Improvecarrier frequency operation speedVSAvoidscheduler implementation

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent segments the scheduling approach by introducing multi-PDSCH and multi-PUSCH scheduling mechanisms that divide the scheduling task into multiple smaller units. This segmentation allows the scheduler to handle high-frequency operations with reduced symbol and slot durations by managing multiple smaller transmissions rather than attempting to schedule entire large blocks, thereby reducing scheduler implementation complexity while maintaining high speed operation.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20240224271A1Determination of HARQ process id for higher carrier frequency

Publication Date: 2024.07.04 INTEL CORP

AI summary

Various embodiments herein provide techniques for determination of hybrid automatic repeat request (HARQ) process identifier (ID). The techniques may be used, for example, for multi-transmission scheduling by a single downlink control information (DCI) and/or in higher carrier frequencies. Other embodiments may be described and claimed.