Measurement Reporting Method Using Dual-Bit Mapping for LTE Adjacent Cells
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Solution Overview
Problem
In SAE/LTE networks, terminals face challenges in effectively reporting measurement data from adjacent cells using multiple access technologies/modes, as the limited reporting space and existing methods fail to accurately rank and select cells that meet the reporting criteria, leading to incomplete reporting.
Innovation Solution
A method and device that map measurement values of adjacent cells to 6-bit and 3-bit reported values, allowing for effective selection and reporting of cells by using the 6-bit values for ranking and 3-bit values for actual reporting, ensuring accurate selection of cells across different access technologies/modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the maximum number of cells allowed to be reported is limited to 3 for multi-RAT scenarios, then the reporting overhead is reduced, but the completeness of measurement data reporting deteriorates when more than 3 cells meet the reporting criterion
Solution Approach 1:
The patent segments the reporting process into two distinct phases: a first reporting phase for E-UTRAN cells with a first maximum number (e.g., 6 cells), and a second reporting phase for non-E-UTRAN cells with a second maximum number (e.g., 3 cells). This segmentation allows the terminal to report more cells overall while maintaining controlled overhead for each specific RAT type, resolving the contradiction between reporting completeness and overhead reduction.
2Loss of information
If the terminal reports all adjacent cells meeting the criterion, then the measurement data completeness is improved, but the reporting message size and processing complexity increase
Solution Approach 1:
The patent divides the measurement report into separate segments for E-UTRAN and non-E-UTRAN cells, each with its own maximum cell limit and reporting rules. This segmentation simplifies the terminal's processing logic by providing clear, differentiated rules for each RAT type, reducing overall processing complexity while maintaining comprehensive reporting of all qualifying cells.
Solution Approach 2:
The patent implements dynamic reporting behavior where the terminal adaptively selects which cells to report based on the cell type (E-UTRAN or non-E-UTRAN) and applies different maximum cell limits accordingly. This dynamic approach allows flexible reporting that adapts to the specific scenario, optimizing between completeness and complexity based on the actual cell composition.
3Ease of operation
If a common maximum cell limit is applied to all RATs, then the reporting rule simplicity is improved, but the adaptability to different RAT-specific requirements deteriorates
Solution Approach 1:
The patent segments the reporting rules into RAT-specific categories, with distinct maximum cell limits for E-UTRAN and non-E-UTRAN cells. This segmentation provides the adaptability needed for different RAT characteristics while maintaining operational simplicity through clear, rule-based differentiation. The terminal can easily apply the appropriate rule set based on the cell type without complex decision logic.
Data Source
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AI summary
Embodiments of the present invention provide a method and a device for reporting measurement data. The method includes: mapping each of measurement values of adjacent cells that meet a reporting criterion to a first reported value in a 6-bit reported value mode; selecting, according to the first reported value, a cell allowed to be reported from the adjacent cells that meet the reporting criterion; mapping a measurement value of the cell allowed to be reported to a second reported value in a 3-bit reported value mode; and reporting the second reported value to a network. In the embodiments of the present invention, the first reported values mapped in the 6-bit reported value mode may be used in ranking of the adjacent cells, and the second reported values mapped in the 3-bit reported value mode may be used in actual reporting of the adjacent cells, so as to effectively rank the adjacent cells.