Correlation-Enhanced Frequency Scanning for Wireless UEs
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in frequency scanning, particularly in identifying active frequency bands, leading to unnecessary delays and resource wastage when attempting to establish connections in empty frequency bands.
Innovation Solution
The implementation of correlation-enhanced frequency scanning, which calculates correlations between different sampling intervals to determine communications activity within a frequency band, allowing devices to quickly identify active bands and avoid attempting connections in inactive ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a UE performs legacy frequency scanning by returning 30 candidate frequency channels for each frequency band, then the UE can identify candidate frequency channels, but the UE spends approximately 40 milliseconds on each candidate frequency channel, wasting up to 1.2 seconds in empty frequency bands
Solution Approach 1:
The patent applies preliminary action by performing correlation calculations on frequency band signals before executing the legacy frequency scanning procedure. The UE calculates correlations between different sampling intervals within a frequency band to detect communications activity in advance, determining whether the band is active or empty before committing to the time-consuming legacy scan process. This preliminary detection prevents wasting 1.2 seconds on empty frequency bands while maintaining accurate identification of active bands.
2Reliability
If a UE attempts to establish a connection in every frequency band regardless of activity status, then the UE can ensure no active band is missed, but the UE performs unnecessary connection establishment attempts in empty frequency bands causing delays
Solution Approach 1:
The patent applies preliminary action by performing correlation-based activity detection before attempting connection establishment. The UE calculates correlations between sampling intervals to determine whether communications activity exists in a frequency band before initiating the legacy frequency scanning and connection establishment procedures. This ensures that connection attempts are only made in actively used frequency bands, eliminating wasted attempts in empty bands while maintaining reliability of detecting all active bands.
Solution Approach 2:
The patent applies feedback by using correlation calculation results to inform the decision of whether to proceed with legacy frequency scanning and connection establishment. The UE continuously monitors frequency bands, performs correlation calculations, and uses the results to dynamically adjust its scanning and connection attempts. This feedback mechanism ensures reliable detection of active bands while improving connection establishment speed by avoiding empty bands.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. An exemplary method includes receiving a signal corresponding to a frequency band, scanning for communications activity within the frequency band, wherein scanning for communications activity within the frequency band comprises performing a correlation calculation on samples of the signal, and determining whether to attempt a connection establishment within the frequency band based at least in part on the correlation calculation on samples of the signal. When the scanning identifies an indication of activity, a scanning device may attempt to establish a connection with a base station within the frequency band. When the scanning identifies an indication of no activity, a scanning device may refrain from attempting to establish a connection with a base station within the frequency band, and may perform the correlation-enhanced frequency scanning on a different frequency band.