Terminal Uplink Resource Utilization in Unlicensed Bands

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Solution Overview

Problem

There is a need to improve uplink resource utilization efficiency in unlicensed bands, particularly in NR-U configurations where carrier sensing mechanisms like LBT are employed.

Innovation Solution

A terminal is configured with control and transmission circuitry that adjusts the end position of a time resource for uplink data based on data size or retransmission requirements, optimizing resource usage in unlicensed bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the end position of time resource is fixed based on predetermined configuration, then transmission timing is simple and deterministic, but uplink resource utilization efficiency is low when data size varies

Engineering Contradiction:

Improveuplink resource utilization efficiencyVSAvoidtransmission parameter configuration complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The end position of the time resource for uplink data transmission is made dynamic rather than fixed. The terminal determines the end position based on the actual data size to be transmitted, allowing the resource allocation to adapt to varying data requirements and improve utilization efficiency

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The transmission parameter (end position of time resource) is changed according to the data size. When data size varies, the terminal adjusts the end position parameter accordingly, optimizing resource usage without requiring complex reconfiguration procedures

Inventive Principle:

Principle #35Parameter changes

2Reliability

If carrier sensing (LBT) is performed before transmission in unlicensed band, then channel access reliability is improved, but transmission latency increases due to additional sensing time

Engineering Contradiction:

Improvechannel access reliabilityVSAvoidtransmission latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Carrier sensing (LBT) is performed in advance before uplink data transmission to ensure channel availability. This preliminary action improves reliability by avoiding collisions with other transmissions while the timing is coordinated to minimize latency impact

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If uplink data transmission uses predetermined transmission timings and radio resources, then transmission control is simplified, but resource flexibility is reduced when retransmission is needed

Engineering Contradiction:

Improvetransmission control simplicityVSAvoidresource flexibility for retransmission

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The time resource configuration is made dynamic to accommodate retransmission scenarios. The end position is adjusted based on whether the transmission is initial or retransmission, providing flexibility while maintaining relatively simple control procedures

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Transmission parameters (end position of time resource) are changed based on transmission type (initial or retransmission) and data size, allowing the system to adapt to different scenarios without complex reconfiguration

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250203614A1Terminal, base station, transmitting method, and receiving method

Publication Date: 2025.06.19 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

Provided is a terminal capable of improving utilization efficiency of an uplink resource in an unlicensed band. In a terminal (200), a transmission control unit (206) sets, in accordance with at least one of a data size and retransmission of uplink data, a first end position of a time resource which is set for the uplink data to a second end position. A transmission unit (210) transmits the uplink data on the basis of the second end position.