Sidelink Synchronization Signal Distribution for Reliable Demodulation
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Solution Overview
Problem
Existing sidelink synchronization signal setting solutions fail to ensure normal synchronization signal services and communication reliability and efficiency in 5G NR systems, particularly due to issues with synchronization signal overlap and increased latency and power consumption.
Innovation Solution
A synchronization signal transmission method that distributes primary and secondary sidelink synchronization signals (PSSS and SSSS) within orthogonal frequency division multiplexing (OFDM) symbols of a sidelink synchronization signal block, ensuring consistent transmission or reception directions and using guard periods when necessary to maintain signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization signals are transmitted in sidelink without proper distribution in OFDM symbols, then transmission simplicity is maintained, but signal overlap occurs causing demodulation errors and reduced communication reliability
Solution Approach 1:
The patent segments the synchronization signal transmission by distributing PSSS and SSSS into different OFDM symbols within the sidelink synchronization signal block. This segmentation prevents signal overlap and demodulation errors while maintaining organized signal structure, resolving the contradiction between reliability improvement and complexity increase.
2Reliability
If guard periods are not used between synchronization signals, then transmission time is reduced, but signal integrity deteriorates due to overlap and direction changes
Solution Approach 1:
The patent applies preliminary action by pre-distributing PSSS and SSSS into separate OFDM symbols and incorporating guard periods before signal transmission. This advance organization prevents signal overlap and maintains integrity, resolving the contradiction between signal integrity and transmission time efficiency.
3Measurement precision
If synchronization signals are transmitted without consistent direction management, then transmission flexibility is maintained, but demodulation performance degrades due to direction changes
Solution Approach 1:
The patent applies local quality by ensuring consistent transmission or reception direction within each OFDM symbol containing synchronization signals. This localized direction consistency improves demodulation performance while the overall system maintains flexibility through selective guard period insertion, resolving the contradiction between demodulation precision and transmission adaptability.
Data Source
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AI summary
This disclosure provides a synchronization signal transmission method and a terminal, and relates to the field of communications technologies. The synchronization signal transmission method, applied to a terminal, includes: transmitting or receiving a sidelink synchronization signal block, where the sidelink synchronization signal block includes: a primary sidelink synchronization signal PSSS and a secondary sidelink synchronization signal SSSS, the PSSS and the SSSS being distributed in orthogonal frequency division multiplexing OFDM symbols occupied by the sidelink synchronization signal block.