5G Synchronization Signal Grouping for Power Spectrum Density
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Solution Overview
Problem
In 5G wireless communication systems, the increased carrier frequency and bandwidth lead to reduced power spectrum density (PSD) of synchronization signals, resulting in a lower signal-to-noise ratio and affected coverage.
Innovation Solution
Configuring multiple groups of synchronization signals to occupy multiple symbols in both time and frequency domains, using different spatial resources and beams to enhance PSD, ensuring coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier frequency and bandwidth are increased in 5G systems, then system capacity and data rate are improved, but power spectrum density of synchronization signals is reduced
Solution Approach 1:
The patent divides the synchronization signal transmission into multiple groups, where each group is mapped to different physical resource blocks. This segmentation allows the total transmission power to be distributed across multiple resources, thereby increasing the power spectrum density of individual synchronization signal groups while maintaining overall system capacity.
Solution Approach 2:
The patent extends synchronization signal transmission from a single time-frequency resource to multiple dimensions by mapping different groups to different physical resource blocks and time symbols. This multi-dimensional approach enables power concentration in specific resources while preserving broadband system capacity.
2Area of stationary object
If carrier frequency and bandwidth are increased, then system bandwidth is expanded, but signal-to-noise ratio of received synchronization signal is reduced
Solution Approach 1:
By segmenting synchronization signals into multiple groups mapped to different physical resource blocks, the patent concentrates power in each segment, improving the signal-to-noise ratio for each group while the overall system bandwidth remains expanded.
Solution Approach 2:
The patent applies different power distribution strategies to different local resources (physical resource blocks). Each local region (resource block) receives concentrated power for synchronization signals, ensuring high signal-to-noise ratio locally, while the global system maintains large bandwidth.
3Reliability
If power spectrum density is increased to improve coverage, then signal coverage is enhanced, but device complexity increases
Solution Approach 1:
The patent creates a universal framework where multiple groups of synchronization signals with different configurations can coexist. Each group follows the same mapping principles to physical resource blocks, allowing the system to achieve enhanced coverage through power concentration while maintaining configuration simplicity through standardized multi-group handling.
Data Source
AI summary
An embodiment of this application provides a synchronization signal transmitting method. The method includes: configuring, by a base station, one or more groups of synchronization signals, where each group of synchronization signals is mapped to N PRBs and occupies multiple symbols in time domain, and N is a positive integer greater than or equal to 1; and transmitting, by the base station, the one or more groups of synchronization signals. In comparison with the prior art, PSD of a synchronization signal can be increased, and coverage of the synchronization signal can be ensured.