Cell Reselection Using SINR Thresholds for Reliable Network Access
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Solution Overview
Problem
Existing communication technologies fail to consider signal-to-interference-plus-noise ratio (SINR) when determining cell reselection, leading to high bit error rates and network access issues due to strong reference-signal receiving-power (RSRP) but poor SINR in serving cells.
Innovation Solution
A method for determining a target cell by measuring neighboring cells based on SINR thresholds, adding serving cells to a blacklist, and sequencing cells using S and R criteria to identify a top-ranked cell for reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device relies solely on RSRP or RSRQ for cell selection, then the device can maintain connection in cells with strong signal power, but the device cannot identify cells with poor SINR that cause high bit error rates
Solution Approach 1:
The patent introduces SINR as an additional measurement parameter alongside RSRP and RSRQ. The network configures thresholds for SINR (first threshold and second threshold) to enable the terminal to assess cell quality more comprehensively. When SINR falls below the first threshold while RSRP/RSRQ remain above their thresholds, the terminal identifies this as a specific cell quality state and triggers appropriate actions such as reporting measurement results or initiating cell reselection, thereby improving both measurement precision and data transmission reliability.
2Use of energy by moving object
If the terminal device does not perform neighboring cell measurement when serving cell RSRP is strong, then the device can reduce measurement overhead and power consumption, but the device misses opportunities to switch to cells with better SINR performance
Solution Approach 1:
The patent implements a dynamic cell selection strategy where the terminal's measurement behavior adapts based on real-time SINR conditions. When the serving cell's SINR is above the first threshold, the terminal adopts a conservative approach with reduced measurement activity. When SINR drops below the first threshold, the terminal activates neighboring cell measurements and evaluation procedures. This dynamic adjustment allows the system to balance power consumption with network access reliability, only performing additional measurements when quality degradation is detected.
3Strength
If the terminal device switches to neighboring cells based on traditional criteria, then the device can improve signal strength, but the device may switch to cells with similar SINR problems causing persistent data transmission issues
Solution Approach 1:
The patent extends the cell evaluation criteria to include SINR measurements of neighboring cells, not just signal strength. When the terminal evaluates neighboring cells for potential reselection, it measures and compares SINR values alongside RSRP/RSRQ. The terminal prioritizes cells that meet both signal strength requirements and acceptable SINR thresholds (above the second threshold). This multi-parameter evaluation ensures that cell switching improves both signal strength and data transmission quality, avoiding the pitfall of moving to cells with similar SINR problems.
Data Source
AI summary
The present disclosure provides a method for determining a target cell, a terminal device and a non-transitory computer readable storage medium. The method is performed by the terminal device, and includes: measuring at least one neighboring cell, in response to a signal-to-interference-plus-noise ratio (SINR) of a serving cell being less than a first threshold value; and determining a target cell based on a result of measuring the at least one neighboring cell.