Unlicensed Spectrum Channel Detection Timing Control
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Solution Overview
Problem
Existing wireless communication systems using unlicensed spectrum lack efficient methods for channel detection and uplink transmission on unlicensed spectra, particularly in determining the appropriate channel access type and starting position for Extended Cyclic Prefix (ECP) and uplink transmissions.
Innovation Solution
A method where a terminal receives first information from a base station to determine the channel access type and starting position for channel detection, ECP transmission, or uplink transmission on unlicensed spectra, using formulas to calculate the starting positions based on provided parameters such as duration, time advance, and ECP length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal performs channel detection on unlicensed spectrum without clear guidelines, then the terminal can attempt transmission, but the transmission may start at incorrect positions or use inappropriate access types leading to communication failures
Solution Approach 1:
The base station performs preliminary actions by sending first information to the terminal before the terminal performs channel detection. This first information includes parameters such as time advance values, ECP lengths, and starting position indicators that prepare the terminal in advance for accurate channel detection and transmission timing, resolving the contradiction by providing clear guidance upfront rather than requiring complex real-time detection algorithms
Solution Approach 2:
The base station acts as an intermediary that provides the terminal with reference information and parameters needed for channel detection. The first information serves as a mediator between the network's transmission scheduling and the terminal's channel access procedure, enabling the terminal to determine appropriate channel access types and starting positions without developing complex autonomous detection mechanisms
2Adaptability or versatility
If the terminal uses fixed channel access procedures, then the procedure is simple to implement, but it cannot adapt to varying transmission requirements and regulatory conditions on unlicensed spectrum
Solution Approach 1:
The channel access procedure becomes dynamic through the first information sent by the base station, which contains adjustable parameters such as time advance values, ECP lengths, and channel access type indicators. These parameters allow the terminal to adapt its channel detection and transmission timing based on varying network conditions, transmission requirements, and regulatory constraints, transforming a static procedure into a flexible, condition-responsive mechanism
Solution Approach 2:
The invention utilizes parameter changes by varying channel access types (e.g., Category 2, Category 4 LBT), time advance values, and ECP lengths based on transmission requirements. The base station configures different parameter sets in the first information to match different service types, channel conditions, and regulatory environments, enabling adaptive channel access without requiring complex decision-making logic at the terminal
3Manufacturing precision
If the terminal calculates starting positions using multiple parameters, then the transmission timing is accurate, but the calculation complexity increases
Solution Approach 1:
The base station performs preliminary calculations and provides pre-computed reference values in the first information, such as time advance values and starting position indicators. This shifts the computational burden from the terminal to the base station, allowing the terminal to achieve accurate transmission timing by applying simple offset calculations rather than performing complex multi-parameter computations autonomously
Data Source
AI summary
Disclosed in embodiments of the present application are a data transmission method, a related device, and a storage medium. The method comprises: a terminal receives first information sent by a base station, the first information being used by the terminal to determine a channel access type for channel detection on an unlicensed spectrum and a start position of at least one of an extended cyclic prefix (ECP) transmission and an uplink transmission after channel detection on the unlicensed spectrum.