Cell Identifier Remainder Calculation for Wireless PCI Optimization
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Solution Overview
Problem
The existing methods for setting Physical Cell Identifiers (PCIs) in wireless communication systems are time-consuming and costly, especially when considering multiple indices for adjacent cells, as they require manual calculation and lack sufficient information about newly established cells, making automatic optimization difficult.
Innovation Solution
A communication control apparatus that uses a processor to determine cell identifiers by calculating remainders based on multiple indices, including the least common multiple of values, to ensure that remainders of divisions by different values are unique between adjacent cells, thereby optimizing PCI settings automatically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calculation methods are used to set cell identifiers considering multiple indices, then the accuracy of PCI settings can be ensured, but the time and cost required for setting increases significantly
Solution Approach 1:
The system enables automatic PCI assignment by having the base station itself perform the optimization calculation based on neighboring cell information, eliminating the need for manual external calculation while maintaining optimization accuracy
Solution Approach 2:
The patent replaces manual mechanical calculation methods with automated computational algorithms that can evaluate multiple indices and determine optimal PCIs rapidly, substituting human effort with machine-based optimization
2Extent of automation
If sufficient information about newly established cells is collected for automatic optimization, then the accuracy of automatic PCI setting improves, but the complexity of the setting process increases
Solution Approach 1:
The base station performs multiple functions including information collection, metric calculation, and PCI determination within a single integrated process, reducing the need for separate complex systems while enabling automatic optimization
Solution Approach 2:
The patent divides the PCI optimization process into distinct metric calculations for different indices, allowing each aspect to be handled separately and systematically, which simplifies the overall complex process into manageable segments
3Reliability
If multiple indices are considered for PCI setting of adjacent cells, then the quality of communication (channel estimation accuracy, synchronization) improves, but the difficulty of manual setting increases
Solution Approach 1:
The base station automatically calculates optimal PCIs considering multiple indices including PSS/SSS differentiation and subcarrier position constraints, eliminating manual complexity while maintaining communication quality
Solution Approach 2:
The system evaluates multiple parameters (remainders modulo 3, modulo 4, and other indices) simultaneously through automated calculation, allowing complex multi-parameter optimization without increasing operational difficulty
Data Source
AI summary
A communication control apparatus includes a memory, and a processor coupled to the memory. The processor is configured to determine, by using metrics related to a first value and a second value, first remainders of divisions of a cell identifier respectively by the first value and the second value, determine a second remainder of a division of the cell identifier by the least common multiple of the first value and second value, by using the first remainders, determine a third remainder of a division of the cell identifier by the least common multiple of the first value, the second value, and a third value, by using the second remainder and a metric related to the third value, and determine a cell identifier that satisfies the third remainder.