Terminal PUSCH Symbol Dropping for 5G Uplink PSD Control

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Solution Overview

Problem

In the context of 5G NR, the simultaneous transmission of PUCCH and PUSCH can lead to a power spectrum density (PSD) difference that exceeds a threshold, causing signal distortion and deteriorating transmission quality, particularly due to the allocation of wider frequency bands, which is not effectively addressed by existing technologies.

Innovation Solution

A terminal is equipped with a circuit that drops symbols or frequency resources of the PUSCH during overlapping transmission intervals with PUCCH, or changes the PUCCH transmission format, to maintain transmission quality without increasing the circuit scale, thereby controlling radio resources in accordance with the permitted PSD difference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If PUCCH and PUSCH are transmitted simultaneously in the same slot, then transmission efficiency is improved, but transmission quality deteriorates due to PSD difference exceeding the permitted threshold

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidtransmission quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent extracts the PUSCH transmission from the overlapping time-frequency resources, removing it from the simultaneous transmission scenario. When PSD difference exceeds the threshold, the PUSCH is dropped in the overlapping portion, allowing PUCCH to be transmitted alone and thus maintaining transmission quality while preserving partial simultaneous transmission benefits

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent dynamically adjusts the transmission strategy based on the calculated PSD difference between PUCCH and PUSCH. The system transitions between simultaneous transmission (when PSD difference is within threshold) and selective dropping (when PSD difference exceeds threshold), optimizing both efficiency and quality based on real-time conditions

Inventive Principle:

Principle #15Dynamics

2Speed

If wider frequency bands are allocated in NR to improve transmission speed, then data transmission capacity increases, but the effect on transmission quality due to permitted PSD difference becomes more notable

Engineering Contradiction:

Improvetransmission speedVSAvoidtransmission quality

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent changes the transmission parameters (specifically PSD and frequency resource allocation) based on the calculated PSD difference. When the difference exceeds the threshold, the system adjusts by dropping PUSCH in overlapping resources, thereby adapting the transmission parameters to maintain quality while preserving the benefit of wideband allocation for speed

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12192914B2Terminal and communication method for uplink control channel transmission

Publication Date: 2025.01.07 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

In a terminal, in a slot having allocated thereto both an uplink control channel (PUCCH) and an uplink channel (PUSCH) that includes uplink data, in a case where the difference between the power spectrum density (PSD) of the PUCCH and the PSD of the PUSCH is greater than a threshold value (permitted difference), a control unit drops symbols of the PUSCH in a transmission interval for the PUSCH overlapping with a transmission interval for the PUCCH. A transmission unit transmits at least the PUCCH in the slot.