SSB Transmission Time Set Optimization for 5G Unlicensed Spectrum
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Solution Overview
Problem
In the context of 5G New Radio (NR) technology, Synchronization Signal Block (SSB) transmission fails due to Listen-Before-Talk (LBT) failures in unlicensed spectrums, limiting transmission opportunities and affecting terminal device measurements.
Innovation Solution
Determine a transmission time set for SSB based on the length of a time window, Subcarrier Spacing (SCS), and the amount of SSB to increase transmission opportunities, allowing alternative transmission times and reducing measurement impact on terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SSB transmission is performed at conventional NR transmission time in unlicensed spectrum, then transmission follows standard protocol, but transmission fails due to LBT failures
Solution Approach 1:
The patent implements dynamic transmission time selection by determining a transmission time set based on time window length, SCS, and SSB amount, allowing the system to adapt transmission timing dynamically rather than using fixed conventional NR transmission times. This enables the system to select optimal transmission moments that avoid LBT failures.
Solution Approach 2:
The patent changes the transmission time parameter from a fixed conventional value to a determined value based on multiple parameters (time window length, SCS, SSB amount). By adjusting these parameters, the system can optimize transmission timing to achieve successful transmission in unlicensed spectrum while maintaining protocol compliance.
2Reliability
If transmission opportunities of SSB are increased to ensure successful transmission, then reliability improves, but measurement impact on terminal increases
Solution Approach 1:
The patent applies partial action by determining a transmission time set that provides sufficient transmission opportunities without exhaustively testing all possible time slots. The transmission time set is calculated based on time window length, SCS, and SSB amount, providing just enough opportunities to ensure successful transmission while avoiding excessive time consumption that would impact terminal measurements.
Data Source
AI summary
A signal transmission method and apparatus and a computer storage medium are provided. The method is implemented by a terminal device and includes: determining a transmission time set of Synchronization Signal Block (SSB), the transmission time set being determined according to at least one of: a length of a time window, a Subcarrier Spacing (SCS) of the SSB and the amount of the SSB (S501); and receiving the SSB from a network device based on the transmission time set (S502).