MDT Measurement Control for Downlink-Only Cells
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Solution Overview
Problem
Inefficient collection of information for optimal area design in downlink-only cells due to unnecessary measurements by UE in Immediate MDT, leading to interference and resource wastage.
Innovation Solution
A system where a base station transmits reporting condition information to a terminal apparatus, enabling the determination of initiation or termination of MDT measurements for downlink-only cells based on measurement thresholds, ensuring that measurements are only conducted within the cell's coverage area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If UE performs Immediate MDT measurements in downlink-only cells, then coverage information can be collected, but unnecessary measurements are performed outside the cell coverage area leading to resource wastage and interference
Solution Approach 1:
The patent applies local quality by making the MDT measurement configuration cell-specific. The base station determines whether to configure Immediate MDT measurements based on whether the UE is actually within the cell coverage area. This localized approach ensures measurements are only performed where relevant (within coverage) rather than universally across all cells, thereby eliminating unnecessary resource consumption while maintaining effective coverage information collection.
2Loss of information
If UE performs measurements in downlink-only cells, then area design information can be obtained, but interference with other cells may occur due to unnecessary coverage extension
Solution Approach 1:
The patent implements preliminary anti-action by having the base station proactively determine whether the UE is within its coverage area before configuring Immediate MDT measurements. This preemptive check prevents the UE from performing measurements that would extend into other cells' coverage areas, thereby preventing interference before it occurs. The base station uses uplink signal detection to verify UE location and only enables measurements when appropriate, counteracting potential interference issues in advance.
3Extent of automation
If Immediate MDT measurements are configured for downlink-only cells, then MDT functionality can be implemented, but unnecessary periodic measurements and event trigger measurements are performed
Solution Approach 1:
The patent applies partial action by selectively enabling Immediate MDT measurements only when the UE is determined to be within the cell coverage area. Instead of configuring measurements unconditionally for all downlink-only cells, the base station performs a partial configuration based on actual UE location. This selective approach maintains full MDT functionality where needed while avoiding excessive measurements elsewhere, thereby improving overall measurement collection efficiency.
Data Source
AI summary
To enable more efficient collection of information for optimal area design targeting a downlink only cell. An apparatus in the present invention includes: an information acquisition unit configured to acquire reporting condition information regarding a condition of reporting performed by a terminal apparatus to a base station; and a communication processing unit configured to transmit the reporting condition information to the terminal apparatus. The reporting is reporting to be used for determining initiation or termination of Minimization of Drive Tests (MDT) measurements for a downlink only cell.