Radio Terminal Cell Logging for Coverage Hole Diagnosis
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Solution Overview
Problem
Current communication systems fail to accurately identify the cause of radio coverage holes, leading to inappropriate handling and unresolved inter-cell interference issues, as they cannot distinguish between lack of coverage and interference problems.
Innovation Solution
A radio communication system where a radio terminal logs information on both allowed and not allowed cells, allowing the network to determine the cause of coverage holes by reporting the presence of not allowed cells, enabling adjustments to reduce interference or optimize coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a radio terminal only logs information on allowed cells, then the logging process is simple, but the network cannot accurately identify the cause of coverage holes
Solution Approach 1:
The patent segments the cell information logging into two distinct parts: information on allowed cells and information on not allowed cells. This segmentation allows the network to differentiate between coverage holes caused by lack of allowed cells versus those caused by interference from not allowed cells, thereby improving measurement precision while maintaining manageable complexity through structured data collection
Solution Approach 2:
The radio terminal acts as an intermediary that collects and reports cell information from both allowed and not allowed cells. By having the terminal gather this comprehensive data and transmit it to the network, the system achieves accurate coverage hole cause identification without requiring complex network-side measurement capabilities
2Loss of information
If a radio terminal logs information on both allowed and not allowed cells, then the network can accurately identify coverage hole causes, but the logging and reporting process becomes more complex
Solution Approach 1:
The radio terminal performs preliminary action by proactively logging information on both allowed and not allowed cells during idle mode operations. This advance data collection ensures that when coverage holes occur, the network receives complete diagnostic information immediately, avoiding the need for complex on-demand measurements and reducing overall system complexity
3Reliability
If the network performs complex analysis without additional terminal measurements, then the processing is centralized, but the network cannot distinguish between coverage and interference issues
Solution Approach 1:
The patent implements feedback by having the radio terminal measure and report cell information on both allowed and not allowed cells to the network. This feedback mechanism provides the network with reliable data to accurately determine coverage hole causes, transforming an undetectable interference problem into a measurable and actionable diagnostic process
Data Source
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AI summary
Provided are a system and method that enable identification of a cause of failure in radio coverage detected by a radio terminal (UE) on a radio network side, and that enable determination and execution of a countermeasure in response to a result of the identification. The radio terminal (UE), which acquires measurement instruction information from a radio station, measures and records in accordance with the measurement instruction information, and reports to the radio station. The radio terminal, in case of a first condition on selection or detection of a first cell (allowed cell) in which the radio terminal is allowed to be served for a predetermined service being satisfied, and a second condition on measurement or logging being satisfied, logs information on a second cell (not allowed cell) in which the radio terminal is not allowed to be served for the predetermined service.