Primary Cell Base Station Channel Detection Notification
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Solution Overview
Problem
LTE systems face challenges when operating at unauthorized frequency bands, including high time delays and reduced accuracy in channel detection, which affect resource utilization and coexistence with other technologies like Wi-Fi.
Innovation Solution
A channel detection notification method where a primary cell base station manages channel detection for secondary cell base stations and terminals at unauthorized frequency bands, using RRM measuring results to trigger downlink and uplink channel detections based on traffic thresholds, employing LBT mechanisms based on frame structure or load, to reduce time delays and improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE system operates at unauthorized frequency band without centralized management, then spectrum utilization is improved, but channel detection time delay increases and accuracy decreases
Solution Approach 1:
The patent introduces a primary cell base station as an intermediary to manage and coordinate channel detection for secondary cell base stations and terminals. This mediator receives RRM measuring results, determines channel detection timing, and sends notification signals to relevant entities, thereby reducing detection delays while maintaining spectrum utilization benefits
Solution Approach 2:
The primary cell base station performs preliminary channel detection and determines detection timing in advance based on RRM measuring results and traffic conditions. By conducting detection proactively and notifying secondary entities beforehand, the system reduces actual transmission delays while maintaining efficient spectrum use
2Ease of operation
If secondary cell base station and terminal conduct independent channel detection, then local responsiveness is improved, but detection accuracy and timing coordination deteriorate
Solution Approach 1:
The primary cell base station acts as a coordinating intermediary that receives RRM measuring results from terminals, determines optimal channel detection timing, and sends notification signals to secondary cell base stations and terminals. This centralized coordination improves detection accuracy while maintaining local operational capability
Solution Approach 2:
The system implements feedback mechanisms where terminals report RRM measuring results to the primary cell base station, which then determines appropriate channel detection timing and notifies secondary entities. This feedback loop ensures accurate detection timing based on actual channel conditions while maintaining coordinated operation
Data Source
AI summary
Provided is a channel detection notification method when a LTE system works at an unauthorized frequency band, a system and a base station. The channel detection notification method includes the follows. A primary cell base station receives RRM measuring results of multiple base stations at the unauthorized frequency band reported by a terminal; according to the RRM measuring results of the multiple base stations, a secondary cell base station is selected for the terminal; if it is determined that downlink traffic reaches a set first traffic threshold value, the secondary cell base station is informed to conduct downlink channel detection at the unauthorized frequency band; and if it is determined that uplink traffic reaches a set second traffic threshold value, the secondary cell base station and/or the terminal is informed to conduct uplink channel detection at the unauthorized frequency band.