5G NR SBFD Transmission Timing for Stable Mode Switching

Solution Overview

Problem

Existing 5G NR wireless communication systems face challenges with uplink coverage and delay in time division duplex (TDD) systems, particularly in implementing sub-band full-duplex (SBFD) without clear application guidelines.

Innovation Solution

A communication method that sets a time interval between two transmissions on the same carrier of a same cell, with differing sub-band duplex mode configurations, to ensure normal transmission performance and reduce data interruption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If sub-band full-duplex is implemented without time interval constraints, then transmission efficiency is improved, but transmission stability and reliability deteriorate due to configuration changes

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidtransmission stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by establishing a time interval constraint before implementing sub-band full-duplex mode changes. The time interval between two transmissions with different sub-band duplex mode configurations is required to be greater than or equal to a first duration threshold, ensuring that the system has sufficient time to switch configurations without causing transmission instability or data loss.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If time interval between transmissions is increased to ensure stability, then transmission reliability is improved, but data transmission interruption increases

Engineering Contradiction:

Improvetransmission stabilityVSAvoiddata transmission interruption

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies parameter changes by dynamically adjusting the time interval parameter based on the duration threshold. When the time interval between transmissions is less than the first duration threshold, the system discards data from the transmission that would cause conflict, thereby changing the effective time allocation parameter to maintain reliability while minimizing data loss.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If sub-band duplex mode configuration changes frequently, then adaptability is improved, but transmission reliability deteriorates due to frequent switches

Engineering Contradiction:

Improveconfiguration flexibilityVSAvoidtransmission stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by establishing a time interval constraint before implementing sub-band full-duplex mode changes. The time interval between two transmissions with different sub-band duplex mode configurations is required to be greater than or equal to a first duration threshold, ensuring that the system has sufficient time to switch configurations without causing transmission instability or data loss.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20260101355A1Communication method, communication apparatus, storage medium, and program product

Publication Date: 2026.04.09 HUAWEI TECH CO LTD

AI summary

This application provides a communication method, a communication apparatus, a storage medium, and a program product, and may be applied to the field of 5G new radio technologies. A specific time interval is set between two transmissions with different sub-band duplex modes, so that the two transmissions can be normally performed when a configuration is changed. This improves transmission efficiency.