Carrier Aggregation Measurement Reporting for Handover Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In mobile communication systems employing carrier aggregation, the increased number of measurement reports for each component carrier leads to higher control signal overhead, deteriorating system efficiency and making handovers between radio base stations inefficient, which can result in suboptimal communication quality.
Innovation Solution
A mobile station and radio base station configuration that measures and reports radio quality for each carrier, including additional carriers not undergoing handover, to optimize handover timing and reduce control signal overhead, thereby enhancing system efficiency and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement reports are transmitted for each component carrier during carrier aggregation, then handover decisions can be made based on comprehensive carrier information, but control signal overhead increases and system efficiency deteriorates
Solution Approach 1:
The patent extracts only the necessary measurement information (radio quality of serving cell and neighboring cells) and transmits it selectively, rather than transmitting all measurement reports for every component carrier. This selective extraction reduces control signal overhead while maintaining sufficient information for accurate handover decisions.
Solution Approach 2:
The patent merges the handover decision process into a single centralized determination at the base station, combining information from multiple carriers into one decision-making process. This eliminates the need for separate measurement reports for each carrier while still achieving comprehensive handover optimization.
2Loss of information
If measurement reports are transmitted for each component carrier, then comprehensive carrier state information is available, but control signal overhead increases
Solution Approach 1:
The patent extracts only the essential measurement parameters (radio quality metrics of serving and neighboring cells) needed for handover decisions, omitting redundant measurement reports from all component carriers. This selective extraction maintains information completeness for critical decisions while significantly reducing control signal overhead.
3Adaptability or versatility
If handover is performed based on individual carrier measurements, then carrier-specific optimization is achieved, but overall communication quality may deteriorate
Solution Approach 1:
The patent merges individual carrier measurement information into a unified handover decision framework at the base station. This combination allows the system to consider the overall communication quality across all carriers when making handover decisions, achieving both carrier-specific optimization and overall system reliability.
Data Source
AI summary
A mobile station UE includes a measurement unit 102 configured to measure radio quality of a cell during communication or a neighboring cell for each of the two or more carriers, a determination unit 104 configured to determine whether to notify the radio base station eNB of a measurement result regarding each of the two or more carriers in the measurement unit 102, and a transmission unit 106 configured to transmit the measurement result in the measurement unit 102 to the radio base station eNB, wherein the transmission unit 106 transmits, in addition to the measurement result regarding a carrier in which it is determined by the determination unit 104 to notify the radio base station eNB of the measurement result in the measurement unit 102, a measurement result regarding a carrier other than the carrier.