Wireless Synchronization Signaling for Beamformed High-Frequency Links
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Solution Overview
Problem
The use of higher frequencies in wireless communication systems introduces challenges related to physical properties and timing, particularly with ubiquitous beamforming, which complicates synchronization signaling.
Innovation Solution
The implementation of improved synchronization signaling methods, including primary and secondary synchronization signals (PSS and SSS) transmitted in blocks across multiple allocation units, utilizing transmission diversity and structured sequences to enhance signal quality and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If higher frequencies are used for wireless communication, then large bandwidths can be utilized, but physical properties and timing become problematic
Solution Approach 1:
The synchronization signal is divided into multiple parts transmitted across different allocation units. The first synchronization signal spans multiple first allocation units while the second synchronization signal spans multiple second allocation units, creating a segmented structure that improves reliability at high frequencies by distributing the synchronization information across multiple time-frequency resources
Solution Approach 2:
The patent extends synchronization signaling into the time dimension by spanning multiple allocation units rather than confining it to a single allocation unit. This multi-allocation unit approach adds a time dimension to the synchronization signal structure, providing redundancy and improved correlation performance necessary for reliable synchronization at millimeter wave frequencies
2Adaptability or versatility
If beamforming is used with small beams, then directional communication is achieved, but synchronization becomes more complicated
Solution Approach 1:
The patent transmits synchronization signals before actual data communication begins. By providing synchronization information in advance through dedicated synchronization signals that span multiple allocation units, the system prepares the receiving device for subsequent beamformed communication, simplifying the overall process despite the complexity of small beam operations
Solution Approach 2:
The synchronization signal acts as an intermediary between the transmitter and receiver in beamforming systems. This dedicated signaling mechanism facilitates the establishment of timing and frequency reference before directional beam communication begins, mediating the complex interaction between transmitter and receiver in millimeter wave systems
3Measurement precision
If synchronization signaling is transmitted periodically, then timing reference is provided, but signaling overhead increases
Solution Approach 1:
The patent combines multiple synchronization signals (first and second synchronization signals) into a unified transmission structure where both signals span multiple allocation units within the same synchronisation time interval. This merging approach provides comprehensive timing and frequency reference information while efficiently utilizing time-frequency resources, reducing overall signaling overhead compared to separate transmissions
Data Source
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AI summary
There is disclosed a method of operating a transmitting radio node (100) in a wireless communication network, the method comprising transmitting first synchronisation signaling comprising one or more first pairs of allocation units carrying broadcast signaling, and transmitting second synchronisation signaling comprising one or more second pairs of allocation units carrying broadcast signaling, wherein broadcast signaling carried on first and second pairs of allocation units are cross-wise associated. The disclosure also pertains to related devices and methods.