LBT Sensing Duration Selection for High Band Unlicensed Access
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in channel access procedures, particularly in high band unlicensed spectrum, where devices struggle to reliably sense channel availability within limited sensing durations, leading to resource wastage and reduced spectral efficiency.
Innovation Solution
The method involves selecting a minimum sensing duration for Listen-Before-Talk (LBT) procedures based on sensing bandwidth or energy threshold, allowing devices to monitor channels for an appropriate duration that balances measurement reliability with processing time, enabling more efficient channel access and coexistence with other devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed sensing duration is used in LBT procedures, then the channel access procedure is simple to implement, but measurement reliability is insufficient in high band unlicensed spectrum
Solution Approach 1:
The patent applies dynamics by making the sensing duration variable rather than fixed. The minimum sensing duration is dynamically adjusted based on the relationship between sensing bandwidth and detection threshold, allowing the system to adapt to different channel conditions and requirements, thereby improving measurement reliability without excessive complexity
Solution Approach 2:
The patent changes the parameter of sensing duration based on other parameters (sensing bandwidth and detection threshold). By establishing a mathematical relationship between these parameters, the system automatically determines the appropriate sensing duration, improving measurement reliability while maintaining implementation simplicity through parameter-based control
2Reliability
If the sensing duration is extended to improve measurement reliability, then channel availability detection becomes more accurate, but processing time and resource consumption increase
Solution Approach 1:
The patent optimizes the sensing duration parameter by establishing its relationship with sensing bandwidth and detection threshold. This parameter-based approach ensures the sensing duration is neither too short (compromising accuracy) nor too long (wasting time), achieving optimal detection accuracy with minimal processing time
Solution Approach 2:
The system performs self-service by automatically determining the appropriate sensing duration based on the configured sensing bandwidth and detection threshold, without requiring external intervention or complex scheduling. The mathematical relationship between parameters enables the system to self-optimize the sensing duration
3Reliability
If a longer sensing duration is used, then channel availability is detected more reliably, but spectral efficiency and throughput are reduced
Solution Approach 1:
The patent optimizes the sensing duration parameter dynamically based on sensing bandwidth and detection threshold, ensuring the minimum necessary sensing time is used to achieve reliable channel detection. This prevents excessive sensing that would reduce spectral efficiency while maintaining adequate detection reliability
Solution Approach 2:
The patent applies partial action by using only the necessary portion of sensing duration required to achieve reliable detection, rather than using a fixed excessive duration. The sensing duration is precisely tuned to the requirements, avoiding unnecessary time consumption and maximizing spectral efficiency
Data Source
AI summary
This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for selecting a minimum measurement duration in listen-before-talk (LBT) sensing slots for high band unlicensed channel access. In some examples, a device may select a minimum sensing duration for an LBT procedure according to a sensing bandwidth or an energy threshold (such as an energy detection threshold or an energy power spectral density threshold), or both. As part of the LBT procedure, the device may measure or sense a wireless channel for at least the selected minimum sensing duration in each sensing slot of the LBT procedure. The device may selectively transmit on the wireless channel according to a result of the LBT procedure. For example, the device may either transmit or refrain from transmitting on the wireless channel depending on whether the device senses the wireless channel to be available.