Radio Terminal Measurement Log Collection via Network Request
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Solution Overview
Problem
Conventional drive tests for radio environment measurement and collection in mobile communication systems are costly and labor-intensive, and there is a risk of unanticipated errors due to the potential deletion of measurement logs by radio terminals after a predetermined time, which can lead to loss of valuable data.
Innovation Solution
A radio base station and method that transmit a measurement configuration message to a radio terminal to store a measurement log, and then request the log for transmission, even if it is not stored, to prevent data loss and ensure accurate data reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the radio terminal automatically deletes the measurement log after a predetermined time, then the storage space is freed and device resources are managed, but the network side may experience unanticipated errors due to potential deletion of valuable data
Solution Approach 1:
The radio terminal provides feedback to the network about the storage status of measurement logs through log storing information. This feedback mechanism allows the network to understand whether the log is currently stored in the terminal, enabling the network to make informed decisions about data retrieval and preventing unanticipated errors.
Solution Approach 2:
The network transmits a log transmission request before the terminal deletes the measurement log. By performing this preliminary action, the network ensures that data is retrieved while still available in the terminal, preventing data loss that would occur if retrieval happened after automatic deletion.
2Reliability
If the radio terminal retains the measurement log indefinitely, then data integrity is maintained, but the device consumes excessive storage space and resources
Solution Approach 1:
The radio terminal is configured to automatically delete measurement logs after a predetermined time period. This periodic action frees up storage space and device resources while the network can still retrieve logs during the retention period by sending transmission requests before deletion occurs.
Solution Approach 2:
The network performs preliminary retrieval of measurement logs by transmitting log transmission requests before the terminal's automatic deletion occurs. This ensures data is captured during the retention window without requiring indefinite storage in the terminal.
3Measurement precision
If conventional drive tests are used for radio environment measurement, then comprehensive data collection is achieved, but large man-hours and high costs are required
Solution Approach 1:
The radio terminal autonomously performs measurement logging of the radio environment according to configuration received from the network. The terminal independently stores measurement results in measurement logs without requiring external intervention, thereby eliminating the need for manual drive tests while maintaining measurement quality.
Solution Approach 2:
The measurement logging function is extracted from the network infrastructure and implemented in the radio terminal itself. This extraction enables distributed, autonomous measurement capabilities at the terminal level, replacing centralized manual drive tests and significantly improving measurement efficiency.
Data Source
AI summary
A radio base station is operable to transmit to a radio terminal a measurement configuration message for causing the radio terminal to perform a logging process of storing a measurement log including a measurement result of a radio environment, and to acquire the measurement log stored by the radio terminal. The radio base station includes a receiver configured to receive, from the radio terminal, log storing information indicating that the measurement log is stored in the radio terminal, and a transmitter configured to transmit, to the radio terminal, a log transmission request to request a transmission of the measurement log on the basis of the log storing information. The receiver is configured to receive, from the radio terminal, a log transmission response for carrying the measurement log and the log transmission response even when the measurement log is not stored in the radio terminal.