Base Station CP Coordination for Unlicensed Band COT Timing
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Solution Overview
Problem
Existing communication methods in unlicensed frequency bands face inefficiencies due to unsolved scheduling issues for UE-initiated COT acquisition and resource utilization challenges, particularly in frame-based equipment (FBE), leading to potential collisions and reduced transmission efficiency.
Innovation Solution
A base station and terminal system that coordinates cyclic prefix (CP) length to manage transmission timings and channel access, allowing flexible COT acquisition and resource allocation through CP extension configurations, ensuring efficient channel access and reduced collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UE-initiated COT acquisition is implemented in unlicensed band, then channel access flexibility is improved, but transmission efficiency deteriorates due to scheduling issues and collisions
Solution Approach 1:
The base station determines and transmits control information about CP length coordination before the actual transmission occurs. This preliminary coordination establishes the timing parameters in advance, allowing the terminal to perform COT acquisition without causing collisions and ensuring efficient resource utilization in unlicensed bands.
2Reliability
If CP extension is used for transmission timing coordination, then collision reduction is improved, but device complexity increases due to additional control information
Solution Approach 1:
The patent modifies the cyclic prefix length parameter to coordinate transmission timings between base station and terminal. By adjusting CP length as a key parameter, the system achieves reliable timing synchronization and collision avoidance in unlicensed band operations without requiring complex additional coordination mechanisms.
Data Source
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.