Dynamic Reference Cell Selection for Carrier Aggregation Measurement Reports
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Solution Overview
Problem
In mobile communication systems, user equipment (UE) faces challenges in efficiently performing quality measurement reports using a fixed serving cell as a reference, especially when multiple serving cells are configured, as it is not dynamic enough to adapt to measurement purposes or UE situations.
Innovation Solution
A method for the UE to perform quality measurement reports based on a specific reference cell selected from among multiple serving cells using a carrier aggregation scheme, where the UE receives measurement configuration information, determines if quality measurement criteria are met, and reports the results along with an indicator of the selected reference cell to the network, allowing for schemes to choose the highest, lowest, or randomly select a cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed serving cell is used as reference for quality measurement reports, then the measurement procedure is simple, but it cannot adapt to different measurement purposes or UE situations when multiple serving cells are configured
Solution Approach 1:
The patent makes the reference cell dynamic by allowing the UE to select different reference cells from multiple serving cells based on measurement purposes and UE situations. Instead of fixing a single reference cell, the system enables flexible selection among multiple cells (PCell, PScell, or SCell) to adapt to varying measurement requirements, thereby resolving the contradiction between adaptability and complexity.
2Loss of information
If the UE reports quality measurement results without indicating the reference cell, then the reporting process is simple, but the network may misunderstand the measurement basis
Solution Approach 1:
The patent introduces an intermediary element - the reference cell indicator - in the measurement report message. This indicator serves as a mediator that conveys which serving cell was used as the reference for the quality measurement without significantly increasing report complexity. The network can then accurately interpret the measurement results based on this indicator, preventing misunderstandings while maintaining reporting simplicity.
3Productivity
If multiple serving cells are configured in the UE, then carrier aggregation capability is improved, but the fixed reference cell approach becomes insufficient for accurate quality measurement
Solution Approach 1:
The patent applies the local quality principle by allowing different serving cells to serve as reference for quality measurements depending on the specific measurement purpose and UE situation. Each serving cell (PCell, PScell, SCell) can be selectively chosen as the reference based on its local characteristics and relevance to the measurement objective, thereby maintaining measurement precision while supporting multiple serving cells for carrier aggregation.
Data Source
AI summary
The present invention relates to a method in which a terminal reports the results of quality measurement based on a specific reference cell from among a plurality of serving cells for the terminal in a mobile communication system using carrier aggregation. The present invention also relates to a terminal apparatus for the method. For this purpose, the terminal receives measurement configuration information from a network, performs a quality measurement in accordance with the received measurement configuration information, determines whether or not a report criterion based on a specific reference cell from among the plurality of cells for the terminal is met in accordance with the measurement result, and, if the report criterion based on the specific reference cell is met, sends a report message, including the measurement results and an indicator that indicates the specific reference cell, to the network.