Uplink Data Transmission Mode Switching for Delay and Reliability

Solution Overview

Problem

Current communication technologies fail to meet the stringent requirements of low latency and high reliability for uplink data transmission, particularly in emerging services that demand rapid and reliable data transfer.

Innovation Solution

A data transmission method where a terminal device determines the transmission mode for subsequent data based on the receipt of a response message within a specific time frame, switching between grant-free and grant-based modes to optimize delay and reliability, with the network device sending a response message including scheduling information to facilitate this adaptation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If grant-free transmission mode is used for uplink data, then transmission delay is reduced, but transmission reliability deteriorates

Engineering Contradiction:

Improvetransmission delayVSAvoidtransmission reliability

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The patent implements dynamic switching between grant-free and grant-based transmission modes based on whether HARQ feedback is received within a preset time window. The terminal device adapts its transmission mode dynamically: using grant-free mode when no feedback is received (to minimize delay) and grant-based mode when feedback is received (to ensure reliability). This dynamic adaptation resolves the contradiction by allowing the system to optimize for speed when necessary and for reliability when possible.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the transmission mode parameter based on HARQ feedback timing. By monitoring whether ACK/NACK feedback is received within the preset time window, the system adjusts the transmission approach - using grant-free transmission (with fixed timing) when feedback is not received, and grant-based transmission (with scheduled resources) when feedback is received. This parameter change enables the system to balance delay and reliability requirements.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If grant-based transmission mode is used for uplink data, then transmission reliability is improved, but transmission delay increases

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidtransmission delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements dynamic switching between grant-free and grant-based transmission modes based on whether HARQ feedback is received within a preset time window. The terminal device adapts its transmission mode dynamically: using grant-free mode when no feedback is received (to minimize delay) and grant-based mode when feedback is received (to ensure reliability). This dynamic adaptation resolves the contradiction by allowing the system to optimize for speed when necessary and for reliability when possible.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the transmission mode parameter based on HARQ feedback timing. By monitoring whether ACK/NACK feedback is received within the preset time window, the system adjusts the transmission approach - using grant-free transmission (with fixed timing) when feedback is not received, and grant-based transmission (with scheduled resources) when feedback is received. This parameter change enables the system to balance delay and reliability requirements.

Inventive Principle:

Principle #35Parameter changes

3Loss of time

If fixed ACK or NACK feedback time is used for grant-free transmission, then transmission delay is reduced, but adaptability to different service requirements deteriorates

Engineering Contradiction:

Improvetransmission delayVSAvoidadaptability to service requirements

Core Design Contradiction:

Loss of timeVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic switching between grant-free and grant-based transmission modes based on whether HARQ feedback is received within a preset time window. The terminal device adapts its transmission mode dynamically: using grant-free mode when no feedback is received (to minimize delay) and grant-based mode when feedback is received (to ensure reliability). This dynamic adaptation resolves the contradiction by allowing the system to optimize for speed when necessary and for reliability when possible.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the transmission mode parameter based on HARQ feedback timing. By monitoring whether ACK/NACK feedback is received within the preset time window, the system adjusts the transmission approach - using grant-free transmission (with fixed timing) when feedback is not received, and grant-based transmission (with scheduled resources) when feedback is received. This parameter change enables the system to balance delay and reliability requirements.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3570607B1Reducing the transmission delay and improving the reliability of uplink data

Publication Date: 2023.07.12 HUAWEI TECH CO LTD

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AI summary

This application discloses a data transmission method and apparatus. The method includes: sending, by a terminal device, first data to a network device in the nlh time unit, where n is an integer greater than or equal to 0; and determining, by the terminal device, a transmission mode of second data based on whether the terminal device receives a response message of the first data before the (n+k)th time unit, where k is a positive integer. According to the data transmission method provided in an embodiment of this application, the terminal device may flexibly determine the transmission mode of the second data based on an actual situation, so as to reduce a transmission delay of uplink data and improve transmission reliability of the uplink data.