MDT Log Reporting via RRC Reconfiguration Indication
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Solution Overview
Problem
In existing Minimization Drive Test (MDT) systems, unreported MDT log results can delay the reporting process, especially during handovers or connection reestablishments, leading to incomplete or delayed log reporting, which hinders timely network environment monitoring and resource allocation.
Innovation Solution
The method involves transmitting a log availability indication in RRC Connection Reconfiguration Complete or RRC Connection Reestablishment Complete messages to instruct the target cell to obtain unreported MDT log results from the UE, ensuring timely reporting by notifying the target cell of stored log availability upon handover or reconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE reports MDT log result only in RRC Connection Setup Complete message, then the network can obtain log information in initial connection, but the target cell cannot know whether the UE has log to report during handover or connection reestablishment, causing delay in log reporting
Solution Approach 1:
The patent applies preliminary action by having the UE proactively indicate log availability in RRC Connection Reconfiguration Complete and RRC Connection Reestablishment Complete messages before the network requests the log data. This advance indication ensures the target cell is immediately aware of available logs during handover or reestablishment scenarios, eliminating the delay that would otherwise occur while the network discovers log availability.
2Adaptability or versatility
If the UE stores MDT log configuration after RRC connection release, then the UE can perform measurement in idle mode, but the network cannot access or transport the MDT context between network nodes
Solution Approach 1:
The patent uses the RRC Connection Reconfiguration Complete and RRC Connection Reestablishment Complete messages as intermediaries to bridge the gap between UE-stored log data and network accessibility. These messages carry the log availability indication from the UE to the target cell, enabling the network to access MDT context information without requiring continuous connection or direct transport between network nodes during idle mode measurements.
Data Source
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AI summary
A method, a device and a system for reporting a Minimization Drive Test (MDT) log result are disclosed by the present invention for ensuring that the MDT log result can be reported in time. The method includes: after a User Equipment (UE) is re-accessed to a target cell from a original cell, if the UE still stores locally an unreported MDT log result, a log available indication can be sent to the target cell by the UE itself or by an Evolved Node Base station (eNB) managing the original cell, and a managing device of the target cell is notified to request the unreported MDT log result from UE. Therefore, the MDT log result is continued reporting in the target cell, and the target cell obtains the log available indication of the UE in time, initiates an acquiring request for the MDT log result to the UE timely and obtains the reported MDT log result in time, thus the collection for the environment information of a network is completed and the environment information is obtained exactly.