Cyclic Prefix Extension for Unlicensed Spectrum Sidelink
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In unlicensed spectrum, if the interval between two adjacent sidelink transmissions exceeds 25 μs, the latter transmission cannot share Channel Occupancy Time (COT) with the previous transmission, leading to reduced probability of occupying the unlicensed spectrum.
Innovation Solution
A processing method is introduced that selects or determines a cyclic prefix extension based on preset parameters such as the number of symbols, timing advance, propagation delay, and gap value, to generate an orthogonal frequency division multiplexing (OFDM) symbol, thereby reserving channel occupancy time and increasing the probability of occupying unlicensed spectrum during sidelink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the interval between two adjacent sidelink transmissions is greater than 25 μs, then the system can ensure proper timing synchronization and signal processing, but the latter transmission cannot share the COT used by the previous transmission, reducing the probability of occupying unlicensed spectrum
Solution Approach 1:
The patent changes the time interval parameter between adjacent sidelink transmissions to be less than 25 μs, which allows the second transmission to share the COT of the first transmission. This parameter adjustment resolves the contradiction by enabling COT sharing while maintaining timing synchronization requirements.
2Productivity
If the interval between two adjacent transmissions is reduced to enable COT sharing, then the probability of occupying unlicensed spectrum increases, but the timing synchronization and signal processing may be compromised
Solution Approach 1:
The patent optimizes the time interval parameter to a specific range (less than 25 μs) that simultaneously satisfies both COT sharing requirements and timing synchronization constraints, resolving the contradiction through precise parameter control.
Data Source
AI summary
Disclosed are a processing method, a communication device and a storage medium. The method selects or determines a cyclic prefix extension based on a preset parameter, generates an orthogonal frequency division multiplexing symbol based on the cyclic prefix extension, communicates based on the orthogonal frequency division multiplexing symbol, generates an orthogonal frequency division multiplexing symbol according to the cyclic prefix extension, and uses the generated orthogonal frequency division multiplexing symbol for sidelink transmission, which helps to reserve channel occupancy time and can increase the probability of occupying unlicensed spectrum during sidelink transmission.