The location of the distorted signal can be found within 10cm.
You can immediately check the location of communication distortion signals throughout the entire building.

What causes mobile communication delays inside a building?

The Electronics and Telecommunications Research Institute (ETRI) has succeeded in developing a technology capable of accurately locating the source of communication distortion signals occurring in communication lines installed on building ceilings or walls.

Mobile carriers provide mobile services by sharing communication lines within buildings with other carriers to reduce costs. When signals from two or more different frequency bands are transmitted over a single line, the water-conducting elements—components connecting the lines—deteriorate, resulting in distorted signals.

With the 'High-Precision Distortion Signal (PIMD) Measurement Device' developed by ETRI, the location of distortion signals occurring in aging communication lines can be found within an error range of 10 cm.

Existing distortion signal measurement devices were designed to operate only in a single frequency band, so to detect distortion signals occurring across the entire mobile communication band, a separate measurement device had to be manufactured for each frequency band.

The high-precision distortion signal measuring device allows for the immediate identification of the location of communication distortion signals throughout the entire building by connecting the measuring device to the communication cable in the building's network equipment room. In addition, it supports features that allow direct input, saving, and loading of building communication line diagrams.

Choi Hyung-do, Project Leader at ETRI’s Radio and Satellite Research Division, explained, “To accelerate the application of frequency efficiency enhancement technology, which is essential for solving rapidly increasing communication demand, it is important to reduce the rate of distorted signals in each building. The distortion signal measurement device will improve the efficiency of frequency utilization, which is a limited resource.”

ETRI plans to proceed with additional technology transfers to mobile telecommunications operators and radio measurement equipment manufacturers, and the technology is ready for immediate commercialization. In addition, the research team explained that the device size can be manufactured to approximately 20% of the original size depending on the requirements of commercial companies.