Sidelink S-SSB Transmission for Unlicensed-Band Synchronization
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring and transmitting sidelink synchronization signals in unlicensed bands, particularly in scenarios where frequency bands switch between licensed and unlicensed spectrums, affecting the number of sidelink synchronization signal block (S-SSB) transmissions.
Innovation Solution
A method and apparatus for a user equipment (UE) to identify the frequency band as licensed or unlicensed, determining the subcarrier spacing and transmission period for S-SSB, and adjusting the number of S-SSB transmissions based on the spectrum type, allowing for at least two S-SSBs in unlicensed bands to enhance transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of S-SSB transmissions is increased in unlicensed bands to improve synchronization reliability, then transmission efficiency is improved, but device complexity and resource configuration complexity increase
Solution Approach 1:
The patent implements dynamic adaptation of S-SSB transmission parameters based on frequency band type. The system automatically adjusts the number of S-SSB transmissions within a period according to whether the band is licensed or unlicensed, and according to subcarrier spacing configuration. This dynamic approach allows the system to optimize reliability for unlicensed bands while avoiding unnecessary complexity in licensed bands where standard configurations suffice.
Solution Approach 2:
The patent changes key transmission parameters (number of S-SSB transmissions, subcarrier spacing, period configuration) based on the operating frequency band. By modifying these parameters according to band type, the system achieves improved synchronization reliability in unlicensed bands without permanently increasing device complexity, as the complexity only arises when needed for specific band operations.
2Productivity
If the number of S-SSB transmissions is increased in unlicensed bands, then transmission efficiency is improved, but resource utilization complexity increases
Solution Approach 1:
The system dynamically configures resource parameters including the number of S-SSB transmissions, subcarrier spacing, and period based on the detected frequency band type. This dynamic resource configuration allows efficient utilization of unlicensed band resources while avoiding the overhead of complex static configurations that would be required to support all possible scenarios.
Solution Approach 2:
The patent modifies transmission parameters such as the number of S-SSB transmissions and subcarrier spacing according to the operating band. These parameter changes enable optimized transmission efficiency in unlicensed bands without requiring complex resource management mechanisms, as the parameters are adapted based on simple band type identification.
3Productivity
If S-SSB transmission parameters are optimized for unlicensed bands, then communication efficiency in unlicensed bands is improved, but adaptability to different frequency bands decreases
Solution Approach 1:
The patent implements a dynamic parameter adaptation mechanism that automatically adjusts S-SSB transmission characteristics based on the operating frequency band. The system detects whether it is operating in a licensed or unlicensed band and accordingly configures the number of S-SSB transmissions, subcarrier spacing, and period. This dynamic approach simultaneously achieves optimized communication efficiency for each band type while maintaining broad adaptability across different frequency bands.
Solution Approach 2:
The patent creates a universal configuration mechanism that handles both licensed and unlicensed bands through a single adaptive framework. The same system infrastructure and parameter adjustment logic serve multiple frequency band types, allowing the system to maintain adaptability while achieving optimized communication efficiency in each specific band through parameter customization.
Data Source
AI summary
A method performed by a user equipment (UE) in a wireless communication system is provided. The method includes identifying whether a frequency band in which the UE operates corresponds to an unlicensed spectrum or a licensed spectrum, identifying a period for a transmission of a sidelink synchronization signal block (S-SSB) and a subcarrier spacing associated with the S-SSB, identifying a number of S-SSB transmissions within the period, and in case that the frequency band corresponds to the unlicensed spectrum, transmitting at least two S-SSBs, wherein the number of S-SSB transmissions relates to the subcarrier spacing and depends on whether the frequency band corresponds to the unlicensed spectrum or the licensed spectrum, and wherein a number of S-SSB transmissions in a case of the frequency band corresponding to the unlicensed spectrum is greater than a number of S-SSB transmissions in a case of the frequency band corresponding to the licensed spectrum.