Idle Mode MDT Terminal Channel Measurement Reporting
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Solution Overview
Problem
Conventional drive tests in mobile communication systems are time-consuming and labor-intensive, requiring manual data collection and increasing costs, while existing Minimization of Drive Test (MDT) technologies do not effectively utilize terminal measurements in idle mode for efficient radio network optimization.
Innovation Solution
A method and terminal that perform measurements in idle mode and report logged channel status information, including supplementary data such as CSG cell measurements, in-device interference indicators, and priority frequency information, to enhance MDT functionality and facilitate cell area optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional drive tests are performed manually with test apparatuses on vehicles, then comprehensive radio environment information can be collected, but the process becomes time-consuming and labor-intensive
Solution Approach 1:
The terminal device performs self-measurement of radio channel information in idle mode without requiring external test apparatuses or manual operations. The terminal autonomously collects serving cell and neighbor cell measurement information, and reports it to the base station, eliminating the need for drive test personnel and vehicles while maintaining comprehensive measurement capabilities
Solution Approach 2:
The patent replaces the mechanical drive test system (vehicles, test apparatuses, manual operations) with an electronic measurement system where terminal devices perform automated radio channel measurements using their built-in capabilities. This substitution transforms a labor-intensive mechanical process into an automated electronic measurement and reporting system
2Productivity
If terminal devices perform MDT measurements in connected mode only, then measurement reporting can be done immediately, but measurements in idle mode are not utilized effectively
Solution Approach 1:
The patent enables terminal devices to perform MDT measurements in both connected mode and idle mode, making the measurement system universal and adaptable to different operational states. The terminal can collect measurement information regardless of its RRC state, and the base station can configure different measurement scenarios appropriate for each mode, maximizing the utilization of terminal measurement capabilities
Solution Approach 2:
The patent introduces dynamic measurement reporting mechanisms where the terminal adapts its measurement and reporting behavior based on its current RRC state. In connected mode, immediate reporting is enabled, while in idle mode, the terminal logs measurements and reports when transitioning to connected mode or when configured to do so, creating a flexible and dynamic measurement system
3Reliability
If additional supplementary information is collected during MDT measurements, then radio network optimization is enhanced, but the complexity of data collection and processing increases
Solution Approach 1:
The patent segments the measurement information into distinct categories: serving cell measurement information, neighbor cell measurement information, and supplementary information. Each category is independently collected and reported, allowing the base station to process different types of data separately and improving overall system manageability despite the increased information volume
Solution Approach 2:
The patent enables terminal devices to pre-log measurement information during idle mode before transitioning to connected mode. This preliminary collection of measurement data ensures that comprehensive information is available immediately when the terminal becomes active, enhancing optimization accuracy without requiring complex real-time data collection mechanisms
Data Source
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AI summary
A method of measuring channel information using a terminal in a communication system, according to an embodiment of the present invention, includes the steps of: receiving channel measurement setup information from a base station; entering an idle mode in the state of communication with the base station; measuring information indicating according to the channel measurement setup information; and transmitting a signal including the measured information to the base station. In addition, a terminal for measuring channel information according to another embodiment of the present invention includes: a transmitting/receiving unit for receiving channel measurement setup information from a base station; and a control unit for controlling the terminal so that the terminal enters an idle mode in the state of communication with the base station and measures information indicating according to the channel measurement setup information, wherein the transmitting receiving unit transmits a signal including the measured information to the base station. According to an embodiment of the present invention, it is easier to identify a channel state by using an MDT measurement result by further reporting various pieces of information when measuring MDT. In addition, it is possible to perform a report on MDT measurement by using a terminal and thus the need for a drive test may be reduced.