Frequency Grid Energy Sorting for Wireless Access Search
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Solution Overview
Problem
Existing methods for User Equipment (UE) to search for access frequencies and modes in wireless communications are inefficient, requiring repeated frequency measurements and lengthy synchronization processes due to multiple modes operating within the same frequency band, leading to prolonged search times and increased workload.
Innovation Solution
A method and apparatus that involve obtaining signal energy across all frequency grids, calculating and sorting energy on the smallest bandwidth for each mode, and accessing the highest energy frequencies and modes to quickly determine the appropriate access mode, thereby reducing search time and improving access success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If repeated frequency measurements are conducted for each mode (GSM, LTE, WCDMA) in each available frequency range, then measurement precision is improved, but measurement time increases and productivity decreases
Solution Approach 1:
The patent segments the frequency band into multiple frequency grids, where each grid corresponds to a specific frequency point. By measuring signal energy at each grid point and comparing it against threshold values, the system can quickly identify candidate frequencies without conducting repeated comprehensive measurements for each mode, thus reducing search time while maintaining measurement precision.
Solution Approach 2:
The patent performs preliminary energy measurement across all frequency grids before mode-specific synchronization. By pre-identifying frequency points with signal energy above certain thresholds, the system prepares a shortened list of candidate frequencies, avoiding the need for repeated measurements during the actual mode search process.
2Adaptability or versatility
If multiple modes are searched in each frequency band, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal frequency detection mechanism that can identify multiple access modes (GSM, LTE, WCDMA) using the same frequency grid structure and energy measurement approach. The system uses mode-specific threshold comparisons to determine which modes are present at each frequency grid, allowing one system to handle multiple modes without proportionally increasing complexity.
3Reliability
If frequency synchronization checks are performed sequentially for each mode, then reliability is improved, but search time increases
Solution Approach 1:
The patent performs preliminary energy measurement and threshold comparison across all frequency grids before initiating mode-specific synchronization. By pre-identifying candidate frequencies that meet energy thresholds for each mode, the system reduces the number of synchronization checks needed, thereby maintaining reliability while improving access speed.
Data Source
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AI summary
The present invention discloses a method and an apparatus for searching for modes and frequencies. The method includes: obtaining signal energy of all frequency grids within a frequency range; obtaining energy of each mode on a smallest bandwidth according to the signal energy of the grids; sorting the energy on the smallest bandwidths of all modes; and accessing a specified number of frequencies and modes of the highest energy in the sorting result. With the present invention, energy on the smallest bandwidths of all modes at a frequency band is obtained and sorted and then an access mode is determined according to the sorting result. Thus the access mode to use for a specified frequency can be quickly determined so as to improve the access success rate of a terminal in the subsequent access process.