Radio Map Gap Detection and Targeted Measurement Update
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Solution Overview
Problem
Existing radio frequency fingerprinting-based systems for generating and updating radio maps in wireless networks face precision issues, leading to degraded network performance due to gaps in radio frequency measurements.
Innovation Solution
An apparatus and method that acquire a radio map, detect gaps, and request additional radio frequency measurements from terminal devices within specific geographical coordinates, updating the map with received measurement data to enhance precision and reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional radio frequency measurements are collected across the entire area to improve radio map accuracy, then measurement precision improves, but signaling overhead and system complexity increase
Solution Approach 1:
The system divides the service area into multiple geographical regions and identifies specific gap areas where measurements are needed. Instead of collecting measurements across the entire area, the network node segments the measurement collection process to target only the identified gaps, reducing unnecessary signaling overhead while maintaining radio map accuracy.
Solution Approach 2:
The system applies local quality by requesting additional measurements specifically at gap locations rather than uniformly across the entire area. The measurement collection is localized to where it is most needed, optimizing the distribution of measurement efforts and reducing overall signaling overhead while improving radio map precision where it matters most.
2Measurement precision
If radio frequency measurements are performed continuously across all areas, then measurement precision improves, but loss of time and energy consumption increase
Solution Approach 1:
The system performs preliminary analysis of existing radio map data to identify gap areas before requesting additional measurements. By pre-processing the data to locate deficiencies, the system avoids unnecessary measurement collection in areas that already have sufficient data, thereby reducing the time required for radio map updates while maintaining accuracy where needed.
Solution Approach 2:
Instead of performing exhaustive measurements across the entire area, the system applies partial action by collecting measurements only in identified gap regions. This selective approach reduces the time and resources required for measurement collection while still achieving the necessary level of radio map accuracy through targeted data gathering.
3Reliability
If comprehensive radio frequency measurements are collected from all terminal devices, then reliability of radio map improves, but quantity of measurements and processing load increase
Solution Approach 1:
The system extracts and isolates only the specific measurement data needed from terminal devices located in gap areas. Rather than collecting comprehensive measurements from all devices across the entire service area, the network node selectively requests and processes only the relevant measurement data from devices in identified gap regions, reducing processing load while maintaining radio map reliability.
Solution Approach 2:
The measurement data collection process is segmented by geographical location and device position. The system divides the terminal device population into groups based on their location relative to identified gaps, and only requests measurements from devices within or near gap areas. This segmentation reduces the total quantity of measurement data that needs to be collected and processed while preserving radio map reliability through targeted data collection.
Data Source
AI summary
Disclosed is a solution for managing a radio map based on radio fingerprinting measurements. A method comprises: acquiring a radio map of an area, the radio map based on radio frequency measurements performed between at least one access node of a wireless network and terminal devices within the area; detecting at least one gap in the radio map and determining geographical coordinates of the at least one gap; causing transmission of a message comprising at least one information element requesting for additional measurements and comprising the geographical coordinates of the at least one gap; in response to the message, receiving at least one radio frequency measurement report related to at least one terminal device and comprising radio frequency measurement data and at least one measurement location where the radio frequency measurement data has been measured; and updating the radio map on the basis of the radio frequency measurement data.