HARQ Process Management for Dynamic and Configured Grant PUSCH

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Solution Overview

Problem

In the 5G mobile communications system, the use of a same HARQ process for both dynamic-grant and configured-grant transmissions can lead to adverse effects on data repetition due to potential confusion and replacement of buffered data, which is not effectively addressed by existing technologies.

Innovation Solution

A method and device for a UE to manage HARQ processes by determining the transmission order and timing of dynamic-grant and configured-grant PUSCH using specific timers and configuration information to prevent confusion and ensure proper data transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the same HARQ process is shared by dynamic-grant and configured-grant transmissions, then resource utilization efficiency is improved, but data buffer reliability deteriorates due to potential confusion and replacement of buffered data

Engineering Contradiction:

Improveresource utilization efficiencyVSAvoiddata buffer reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments the HARQ process management by introducing separate timer mechanisms (configuredGrantTimer and dynamicGrantTimer) for configured-grant and dynamic-grant transmissions. This segmentation allows independent control and tracking of each grant type within the shared HARQ process, preventing confusion and data buffer replacement while maintaining resource utilization efficiency.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If HARQ process identities are shared between dynamic-grant and configured-grant, then system complexity is reduced, but transmission reliability deteriorates due to potential data confusion

Engineering Contradiction:

Improvesystem complexityVSAvoidtransmission reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent introduces timer mechanisms (configuredGrantTimer and dynamicGrantTimer) as intermediary control elements that mediate between the shared HARQ process identities and the actual transmission operations. These timers act as intermediaries to track and differentiate the state of each grant type, ensuring transmission reliability while maintaining the simplicity of shared HARQ process identities.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Quantity of substance

If data buffer is reused in the same HARQ process, then memory efficiency is improved, but data integrity deteriorates due to potential replacement of buffered data

Engineering Contradiction:

Improvememory efficiencyVSAvoiddata integrity

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent implements preliminary action by starting configuredGrantTimer before configured-grant transmission and dynamicGrantTimer before dynamic-grant transmission. These timers are activated in advance to track the state of data buffers before any potential replacement occurs, allowing the system to prevent unauthorized buffer replacement and maintain data integrity while reusing memory efficiently.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3751773B1Transmission method and device

Publication Date: 2025.04.02 VIVO MOBILE COMM CO LTD

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AI summary

The present disclosure in some embodiments provides a transmission method and a transmission device. The transmission method includes, in a case that a same first HARQ process is used by a dynamic-grant PUSCH and a configured-grant PUSCH, transmitting one of the configured-grant PUSCH and the dynamic-grant PUSCH using the first HARQ process, or transmitting the configured-grant PUSCH or the dynamic-grant PUSCH using the first HARQ process and then transmitting the dynamic-grant PUSCH or the configured-grant PUSCH using the first HARQ process.