Base Station CP Coordination for NR-U Transmission Timing

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing communication methods in unlicensed frequency bands, particularly in NR-U, face challenges in efficiently managing channel occupancy time (COT) acquisition and transmission efficiency due to constraints in UE-initiated COT scheduling and resource utilization inefficiencies in configured grant transmissions.

Innovation Solution

A base station and terminal configuration that dynamically coordinates cyclic prefix (CP) length to optimize transmission timings and COT acquisition, using CP extension mechanisms to avoid collisions and adjust gaps, thereby improving scheduling flexibility and efficiency in unlicensed frequency bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If UE-initiated COT scheduling is used in unlicensed bands, then transmission flexibility is improved, but transmission efficiency deteriorates due to resource utilization inefficiencies

Engineering Contradiction:

Improvetransmission flexibilityVSAvoidtransmission efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent dynamically adjusts the cyclic prefix (CP) length parameter based on transmission timing and COT acquisition status. By changing the CP length parameter, the system optimizes resource utilization efficiency while maintaining transmission flexibility in unlicensed bands, directly resolving the contradiction between flexibility and efficiency.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If CP length is extended to avoid collisions and adjust gaps, 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 CP length adjustment where the CP extension is applied selectively based on transmission timing and COT acquisition. Rather than using a fixed extended CP length, the system dynamically adapts the CP duration to match actual transmission needs, thereby improving reliability only when necessary while minimizing unnecessary delays.

Inventive Principle:

Principle #15Dynamics

3Ease of operation

If configured grant transmissions are used, then scheduling simplicity is improved, but resource utilization efficiency deteriorates

Engineering Contradiction:

Improvescheduling simplicityVSAvoidresource utilization efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The patent modifies the configured grant transmission mechanism by dynamically adjusting the CP length parameter based on actual transmission conditions and COT acquisition timing. This parameter change enables the system to maintain the simplicity of configured grant scheduling while significantly improving resource utilization efficiency by adapting to unlicensed band characteristics.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12512941B2Base station, terminal, and communication method

Publication Date: 2025.12.30 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

The present invention improves transmission efficiency in unlicensed bands. This base station comprises: a control circuit for determining a cyclic prefix (CP) length coordinated between a terminal and the base station; and a transmission circuit for transmitting control information regarding the determined CP length to the terminal.