LTE Channel Reservation Signal Sequence Design for Shared Spectrum
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Solution Overview
Problem
In wireless communication systems, particularly in LTE/LTE-Advanced networks, the use of contention-based shared radio frequency spectrum bands for unlicensed bands leads to interference between antenna ports, affecting channel reservation accuracy and efficiency due to signal correlation, resulting in false alarms and inefficient channel access.
Innovation Solution
Generating a channel reserving signal sequence based on an antenna port identifier to reduce auto-correlation and cross-correlation, improving detection capabilities and channel reservation accuracy by configuring the sequence with good auto-correlation and cross-correlation properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a channel reserving signal is transmitted over contention-based shared spectrum, then channel reservation is achieved, but signal correlation between antenna ports causes false alarms and reduces detection accuracy
Solution Approach 1:
The patent changes the parameter of the channel reserving signal by generating different sequences based on antenna port identifiers. This parameter change reduces signal correlation between antenna ports, thereby reducing false alarms and improving both channel reservation accuracy and signal detection accuracy simultaneously
2Productivity
If signal transmission is performed in contention-based shared spectrum, then data transmission capacity is enhanced, but interference between antenna ports reduces channel access efficiency
Solution Approach 1:
The patent applies parameter changes by generating channel reserving signal sequences with distinct characteristics based on antenna port identifiers. This reduces harmful signal interference between antenna ports while maintaining enhanced data transmission capacity through multiple antenna ports
Data Source
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AI summary
Reporting and measurements of measurement signals transmitted as a part of LTE/LTE-A networks that include contention-based spectrum is disclosed. In one aspect, a user equipment (UE) performs measurement signal thresholding by estimating the noise associated with the measurement signal. The UE would then use a measured parameter of that signal based on the measurement signal exceeding the threshold as a candidate for a valid measured parameter.