SSB Transmission via Fixed Frame Period Alignment
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting Synchronization Signal Blocks (SSBs) in a manner that optimizes resource utilization and minimizes interference, particularly in unlicensed bands, due to limitations in channel access mechanisms and frame structure alignment.
Innovation Solution
The proposed method involves configuring a Fixed Frame Period (FFP) for periodic transmission of SSBs, where the transmission start position is aligned with a specific time resource within every N-th FFP, allowing for efficient channel occupancy and Clear Channel Assessment (CCA) operations, and enabling SSB transmission on unlicensed bands using an FBE-based LBT technique.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SSB transmission is performed periodically without fixed frame period alignment, then transmission flexibility is maintained, but resource efficiency decreases and interference increases
Solution Approach 1:
The patent implements periodic SSB transmission aligned with Fixed Frame Periods, where SSBs are transmitted at predetermined intervals (e.g., every 5ms, 10ms, 20ms, 40ms, or 80ms) synchronized with the FFP structure. This periodic alignment ensures that SSB transmissions occur at consistent time resources across different cells, improving resource efficiency and reducing interference while maintaining manageable complexity through standardized timing configurations.
2Measurement precision
If SSB transmission frequency is increased to improve synchronization accuracy, then timing precision improves, but channel interference increases
Solution Approach 1:
The patent enables dynamic adjustment of SSB transmission periodicity by configuring different FFP durations (5ms, 10ms, 20ms, 40ms, 80ms) and selecting appropriate SSB transmission occasions within each FFP. This allows the system to optimize synchronization accuracy by increasing transmission frequency when needed while reducing interference by extending periods or reducing transmission density in high-interference scenarios, providing flexible parameter tuning to balance these competing requirements.
Data Source
AI summary
Provided is a synchronization signal block (SSB) transmission method performed by a communication device in a wireless communication system. The method is characterized in that: a time duration of a fixed frame period (FFP) is set for another communication device; and the SSB is periodically transmitted to the other communication device, wherein the SSB is periodically transmitted on each Nth FFP, said N being an integer greater than or equal to 1, and the transmission start time of the SSB is the first time resource included in each Nth FFP.