Cell Reselection Method for Same-Priority Frequencies
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Solution Overview
Problem
Existing cell reselection methods in mobile communication systems do not effectively handle scenarios where multiple cells on different frequencies with the same priority meet reselection conditions, leading to inefficiencies in terminal reselection processes.
Innovation Solution
A method where cells on multiple frequencies with the same priority are treated as same-priority cells, allowing terminals to select the best cell based on an offset-based reselection principle, enabling efficient reselection among cells with equal priority frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal measures all intra-frequency and inter-frequency neighbouring cells using the offset-based cell reselection method, then the cell reselection can be performed among all neighbouring cells, but the terminal will consume more electric energy
Solution Approach 1:
The patent segments the cell reselection process into two distinct phases: first, frequency selection based on absolute priority values (measuring only frequencies, not all cells); second, cell selection within the chosen frequency using offset-based method. This segmentation allows the terminal to avoid measuring all cells on all frequencies, thereby reducing energy consumption while maintaining comprehensive reselection capability.
2Adaptability or versatility
If the terminal switches the resonant frequency of a receiver to perform inter-frequency measurement, then the terminal can measure cells on different frequencies, but the measurement process becomes more complex and time-consuming
Solution Approach 1:
The patent applies preliminary action by first determining the absolute priority values of different frequencies and selecting the target frequency before performing cell measurements. This preliminary frequency selection step simplifies the subsequent measurement process by limiting it to a single frequency, thereby reducing the overall complexity and time required for inter-frequency measurements.
3Adaptability or versatility
If multiple cells on different frequencies with the same priority meet reselection conditions, then the terminal has multiple reselection options, but the existing methods do not effectively handle the selection among these cells
Solution Approach 1:
The patent resolves the ambiguity of selecting among multiple cells with the same priority by changing the evaluation parameter from frequency priority to cell-specific R value (Qmeas + Qhyst - Qoffset). This parameter change provides a clear, quantitative basis for comparison and selection among cells that have equal frequency priority, making the reselection decision efficient and deterministic.
Data Source
AI summary
The present invention provides a cell reselection method and terminal. The method includes: cells on multiple frequencies with the same priority are set as same-priority cells. The terminal comprises: a first reselection module, used to select cells on multiple frequencies with the same priority according to a priority-based reselection principle when a terminal performs cell reselection, wherein the cells on multiple frequencies with the same priority are same-priority cells; a second reselection module, used to select a cell as a reselected cell from the same-priority cells based on a best-cell reselection principle. The above technical solution enables the terminal to perform cell reselection quickly in a determined manner, and enables configuration of network parameters to achieve the intended purpose.