Qosmotec Reveals Cause of Call Drops in Tunnels

08. November 2010

Qosmotec Reveals Cause of Mysterious Call Drops in Tunnels

One major European UMTS operator was plagued by unexplained drops of data calls inside railway tunnels equipped with radio repeaters. The problem only occurred inside high-speed trains, despite the fact that their network had passed all standard 3GPP high-speed train tests in the lab with no difficulty.

Learn how Qosmotec was able to solve the puzzle with their QPER channel emulator in this article, recently published in a special issue^* by the German radio technology business magazine Funkschau (scroll down for English version).

^*Funkschau-Sonderpublikation Case Study 02/2010, November 5, 2010, WEKA FACHMEDIEN GmbH