User Equipment Priority-Based Layer Measurement for Handover
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Solution Overview
Problem
Current mobile communication systems face inefficiencies in different-frequency measurements and handovers due to the need for simultaneous measurement of multiple layers, which can lead to prolonged measurement times and potential delays in handover processes, especially when prioritization is not effectively managed.
Innovation Solution
A user equipment and base station device configuration that allows for different-frequency measurement of multiple layers based on prioritization, where the user equipment measures communication quality in cells belonging to multiple layers in an RRC_Connected state and Idle state, respectively, using first and second priorities notified by the base station device, enabling faster and higher-quality handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the user equipment simultaneously measures communication quality in cells belonging to multiple layers, then the measurement coverage is improved, but the measurement time is prolonged
Solution Approach 1:
The patent divides the measurement process into segments by introducing priorities for different layers. Instead of simultaneously measuring all layers, the UE measures layers in sequence according to their priority levels, starting from the highest priority layer. This segmentation reduces the overall measurement time while ensuring that critical layers are measured first.
Solution Approach 2:
The base station performs preliminary action by notifying the UE of the priority order for different layers before the measurement process begins. This allows the UE to pre-configure its measurement strategy and execute measurements efficiently according to the predetermined priority sequence, avoiding time-consuming simultaneous measurements.
2Measurement precision
If the user equipment performs handover based on communication quality measurement, then the handover accuracy is improved, but the handover delay is increased
Solution Approach 1:
The patent segments the handover decision process by prioritizing layers. The UE and base station focus on measuring and evaluating communication quality in layers with higher priorities first, enabling faster handover decisions for critical services while maintaining accuracy for important layers.
Solution Approach 2:
The base station provides preliminary guidance by notifying the UE of layer priorities before handover execution. This allows the UE to prepare measurement reports and handover decisions more quickly by focusing on high-priority layers, reducing overall handover delay while maintaining accuracy.
3Productivity
If the base station notifies the user equipment of measurement priorities for multiple layers, then the measurement efficiency is improved, but the signaling overhead is increased
Solution Approach 1:
The patent makes the priority notification mechanism universal by applying the same priority-based approach to both RRC_Connected and Idle states. This multi-functional application allows the system to handle different measurement scenarios (handover in connected state, cell reselection in idle state) using a unified priority notification framework, improving overall measurement efficiency across multiple functions.
Solution Approach 2:
The patent changes the parameter of priority assignment dynamically based on the UE state. Different priority configurations can be notified to the UE depending on whether it is in RRC_Connected or Idle state, allowing optimization of measurement efficiency for each state while managing signaling overhead appropriately.
Data Source
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AI summary
User equipment 100n comprises a connection state processing section configured so that the connection state processing section measures the communication quality in a cell belonging to two or more layers, reports the result of the measurement to a base station device 200, and performs handover processing according to the instruction from the base station device 200 on the basis of first priority notified by a first control signal notified from the base station device 200 in an RRC_Connected state and a stand-by state processing section configured so that the stand-by state processing section measures the communication quality in the cell belonging to the two or more layers to determine a cell for performing a stand-by according to the result of the measurement on the basis of second priority notified by a second control signal notified from the base station device 200 in an Idle state.