D2D Synchronization Signal Detection via Segmented Transmission
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Solution Overview
Problem
In wireless communication systems, especially in D2D communication, achieving synchronization between user equipment is challenging due to limited resource availability and the difficulty in detecting synchronization signals over long periods, which affects synchronization performance.
Innovation Solution
A method for D2D communication that involves repeatedly transmitting synchronization signals with varying sequences and offsets over a longer period, allowing for improved energy accumulation and synchronization detection, including the use of a specific end sequence and phase rotation patterns to enhance detection accuracy and minimize errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization signals are transmitted over a longer period for better detection, then synchronization performance is improved, but the difficulty of detecting synchronization signals increases due to limited resource availability
Solution Approach 1:
The synchronization signal transmission period is divided into multiple sub-periods with different sequence offsets. Instead of transmitting a single continuous synchronization signal, the system segments the transmission into discrete intervals where each interval uses a different offset value, making it easier for user equipment to detect and distinguish synchronization signals in resource-constrained environments
Solution Approach 2:
The patent changes the sequence offset parameter across different transmission periods to improve detectability. By varying the offset value in each sub-period, the synchronization signal becomes more distinguishable from background noise and other signals, enhancing detection performance without requiring excessive transmission power or resources
2Measurement precision
If synchronization sequences are varied to improve detection accuracy, then sequence detection performance is improved, but the complexity of the synchronization system increases
Solution Approach 1:
Different local qualities (sequence offsets) are applied to different segments of the synchronization signal transmission. Each sub-period uses a specific offset value tailored to its time position, creating local variations that improve detection accuracy while maintaining an overall simple and structured system framework
Solution Approach 2:
The synchronization signal is transmitted periodically with a defined pattern of sequence offsets. This periodic structure allows user equipment to predict and efficiently search for synchronization signals at expected time intervals, reducing the computational complexity of detection while maintaining high accuracy
3Reliability
If synchronization signals are transmitted repeatedly over long periods, then energy accumulation for detection is improved, but the time required for synchronization increases
Solution Approach 1:
The system performs preliminary synchronization by transmitting synchronization signals with different offsets in advance across multiple sub-periods. User equipment can perform correlation detection on these pre-transmitted signals with different offsets, enabling faster synchronization establishment without requiring extended transmission periods
Data Source
AI summary
The present invention relates to a method for detecting a synchronization signal for device-to-device (D2D) in a wireless communication system. More specifically, the method comprises a step of detecting at least one synchronization signal, which is transmitted repeatedly for D2D communication, in a synchronization signal transmission period for D2D communication, wherein the at least one synchronization signal comprises at least one synchronization sequence generated on the basis of a first root index according to a synchronization reference ID.