PSSS Cyclic Shift Selection for Efficient Sidelink Synchronization
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently generating synchronization signals for device-to-device communication, particularly in scenarios requiring enhanced mobile broadband, massive machine type communications, and ultra-reliable low-latency communications, where synchronization between devices is critical but inefficient due to direct synchronization adjustments among multiple UEs.
Innovation Solution
A method and apparatus for generating primary and secondary sidelink synchronization signals based on specific cyclic shifts, utilizing predetermined ratios and offsets of downlink synchronization signal sequences, with optimized cyclic shift values to enhance synchronization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct synchronization adjustments are performed among multiple UEs, then synchronization between devices can be achieved, but network overhead and power consumption increase
Solution Approach 1:
The patent introduces a sidelink synchronization signal (SLSS) as an intermediary mechanism that enables UEs to synchronize with each other indirectly through a common reference signal, rather than requiring direct pairwise synchronization adjustments. This mediator approach reduces the complexity and power consumption of the synchronization process while maintaining reliability
2Reliability
If direct synchronization adjustments are performed among multiple UEs, then synchronization between devices can be achieved, but network overhead increases
Solution Approach 1:
The SLSS serves as a compact intermediary signal that carries synchronization information efficiently. Instead of exchanging multiple synchronization adjustment messages between UEs, the system uses a single standardized SLSS structure that reduces the quantity of control information and signaling overhead in the network
3Productivity
If optimized cyclic shift values are used for PSSS generation, then synchronization efficiency is improved, but device complexity increases
Solution Approach 1:
The patent optimizes specific parameters (cyclic shift values) of the PSSS generation process to improve synchronization efficiency. By carefully selecting cyclic shift values that maximize the interval between different UE signals, the system achieves better synchronization performance while maintaining a relatively simple generation process based on established signal processing techniques
Data Source
AI summary
The present invention relates to a wireless communication system, and in particular, to a method and a device therefor, in which a sequence for a primary sidelink synchronization signal (PSSS) is generated on the basis of a specific cyclic shift value, and the PSSS is transmitted to a second device on the basis of the generated sequence, wherein the specific cyclic shift value is one of a plurality of first cyclic shift values for the PSSS, the plurality of first cyclic shift values are on the basis of a certain ratio being applied to offsets of second cyclic shift values for a downlink primary synchronization signal (DL PSS) sequence, and the intervals between the plurality of first cyclic shift values are maximized.