Unlicensed Spectrum Reference Signal Detection Reliability
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Solution Overview
Problem
The efficiency of terminal devices in detecting information for data transmission within Channel Occupancy Time (COT) in unlicensed spectrum communication is hindered by uncertainties in detecting reference signals, leading to potential missed detections due to detection issues or channel quality problems.
Innovation Solution
The method involves sending multiple reference signals and first information within COT by the network device to the terminal device, allowing the terminal device to detect the starting position of COT more reliably and improve data transceiving efficiency by adopting different detection modes based on COT information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single reference signal is sent within COT, then resource overhead is reduced, but terminal device detection reliability deteriorates due to potential missed detections from detection issues or channel quality problems
Solution Approach 1:
The patent applies local quality by differentiating the detection modes for different time periods within COT. The terminal device uses a first detection mode during the first time period (after detecting first information) and a second detection mode during the second time period (after detecting reference signal), optimizing detection reliability for each specific scenario rather than using a uniform approach throughout COT.
Solution Approach 2:
The patent implements dynamics by enabling the terminal device to dynamically switch between different detection modes based on the detected COT information. The device can adaptively select the appropriate detection mode (first or second) depending on which information is successfully detected, making the detection process flexible and responsive to changing channel conditions.
2Reliability
If multiple reference signals are sent within COT, then detection reliability is improved by reducing missed detections, but resource overhead increases
Solution Approach 1:
The patent applies partial action by sending only one reference signal within COT, which is sufficient when combined with the first information that indicates COT starting position. This avoids the resource overhead of sending multiple reference signals while maintaining detection reliability through the complementary first information.
3Reliability
If terminal device continuously monitors for reference signals throughout COT, then detection coverage is improved, but energy consumption increases
Solution Approach 1:
The patent segments the COT into two distinct time periods with different detection requirements. The first time period focuses on detecting first information (indicating COT starting position), while the second time period focuses on detecting the reference signal. This segmentation allows the terminal device to optimize its detection efforts and reduce energy consumption by not continuously monitoring for both types of information throughout the entire COT.
Solution Approach 2:
The patent applies preliminary action by having the terminal device detect the first information (indicating COT starting position) before detecting the reference signal. This preliminary detection of COT boundaries enables the device to know when to expect and where to look for the reference signal, improving detection efficiency and reducing unnecessary continuous monitoring.
Data Source
AI summary
Embodiments of the present disclosure relate to a method for communication in an unlicensed spectrum and a device. The method includes detecting, by a terminal device, a reference signal. The reference signal is used for indicating that a network device has obtained Channel Occupancy Time (COT). The method further includes detecting, by the terminal device, second information used for indicating data receiving or sending within the COT, after the reference signal has been detected. There are a plurality of the reference signals within the COT.