SSB Transmission on Shared Spectrum via LBT Resource Switching
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Solution Overview
Problem
In the SideLink (SL) system, terminal devices fail to transmit Synchronization Signal Blocks (SSB) on shared spectra due to Listen Before Talk (LBT) failures, affecting SSB detection performance.
Innovation Solution
The terminal device performs channel detection on multiple time domain resources on the shared spectrum, allowing it to switch to an available resource for SSB transmission after a successful LBT, thereby improving transmission opportunities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device performs LBT before sending SSB resource on shared spectrum, then the transmission reliability is improved, but the transmission opportunity is reduced when LBT fails
Solution Approach 1:
The patent segments the SSB transmission into multiple independent time domain resources. When LBT fails on one resource, the terminal device can still attempt transmission on other segmented resources, thereby maintaining transmission opportunities while ensuring reliability through multiple attempts.
Solution Approach 2:
The patent performs preliminary channel detection (LBT) on multiple time domain resources before actual SSB transmission. This preliminary action on multiple resources ensures that when one resource fails, other resources are already prepared and available for transmission, improving both reliability and transmission opportunity.
2Productivity
If the terminal device continues LBT on other SSB resources after LBT failure, then the transmission opportunity is improved, but the device complexity increases
Solution Approach 1:
The patent implements a dynamic SSB transmission mechanism where the terminal device adaptively continues LBT on subsequent time domain resources after an initial failure. This dynamic approach allows the system to respond to channel conditions in real-time, improving transmission opportunities without requiring complex reconfiguration, as the basic LBT and transmission procedure remains the same.
Data Source
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AI summary
Embodiments of the present invention provide a synchronization signal block (SSB) transmission method, a terminal device, and a computer-readable storage medium, enabling SSB transmissions to continue even after an LBT operation performed prior to an SSB resource transmission has failed, and accordingly improving the performance of SSB detection. The method according to the embodiments of the present invention comprises: a terminal device performing channel detection on a first carrier on a shared spectrum, and determining the availability of at least one first time domain resource on the first carrier, wherein each of the at least one first time domain resource is used to transmit a synchronization signal block. (FIG. 3)