MDT Data Reporting Segmentation for PDCP Capacity Limits
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Solution Overview
Problem
The existing Minimization Drive Test (MDT) measurement systems face issues with reporting MDT measurement result data due to the data amount exceeding the capacity of the Packet Data Convergence Protocol (PDCP) module, leading to failures in security protection and transmission of signaling.
Innovation Solution
A method where the user equipment receives an instruction to report MDT measurement results in multiple data packets, each packet's size not exceeding the PDCP module's capacity, with optional inclusion of a serial number or report progress information to indicate further data, allowing the base station to determine if additional reporting is needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the UE reports all MDT measurement result data in a single PDCP message, then the reporting is complete, but the data amount exceeds the PDCP module capacity causing transmission failure
Solution Approach 1:
The patent divides the MDT measurement result data into multiple segments, each fitting within the PDCP module capacity. The UE transmits these segmented data packets sequentially, with each packet containing a portion of the total measurement data. This segmentation resolves the contradiction by ensuring each transmission is reliable (within capacity) while collectively achieving complete data reporting.
2Reliability
If the UE transmits MDT data in multiple packets, then the PDCP capacity constraint is satisfied, but the base station cannot determine whether additional reporting is needed
Solution Approach 1:
The patent implements a feedback mechanism where the UE includes reporting status information in each transmitted packet, indicating whether more data packets follow. The base station uses this feedback to determine if additional reporting is needed and can send appropriate acknowledgment or request messages. This resolves the contradiction by providing the base station with the information needed to manage the multi-packet reporting process effectively.
3Device complexity
If the UE waits for base station instruction before reporting, then the network controls the reporting process, but the reporting efficiency is reduced due to multiple round-trip communications
Solution Approach 1:
The patent applies preliminary action by having the UE proactively transmit the first MDT data packet without waiting for a base station instruction. The UE autonomously initiates the reporting process, and the base station responds with acknowledgment or additional requests. This reduces the number of round-trip communications needed to start the reporting process while maintaining network control through the feedback mechanism, thus resolving the contradiction between network control and reporting efficiency.
Data Source
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AI summary
Disclosed are a minimization of drive test (MDT) method, system, and device, relating to the technical field of radio communications for solving the problem that the MDT measurement data fails to be reported because the data volume of MDT measurement data reported by a user equipment (UE) exceeds the volume of data capable of being stored by a PDCP module. In the present invention, a UE receives a notification, sent from a base station, of reporting an MDT measurement result; and when a total data volume of the stored MDT measurement result data to be reported is greater than the volume of data capable of being stored by a PDCP module, the UE reports the MDT measurement result data to the base station in one or more times, the total data volume of MDT measurement result data reported each time being not greater than the volume of data capable of being stored by the PDCP module. With the present invention, the problem that the MDT measurement data fails to be reported because the data volume of MDT measurement data reported by the UE exceeds the volume of data capable of being stored by the PDCP module can be solved.