Publications Repository - Gdańsk University of Technology

The Internet of Things (IoT) networks concept implies their presence in a various and untypical locations, usually with a disturbed radio signals propagation. In the presented paper an investigation of an additional path loss observed in an underground environment was described. The proposed measurement locations correspond to the operation areas of rapidly growing narrowband IoT (NBIoT) networks, the ones using the Long Term Evolution (LTE) network resources. During the measurement campaign the received signal power (RSP) in an outdoor-to-indoor (OUT2IN) and outdoor-to-outdoor radio link was measured. After analysis of the measurement results obtained in the building floors and in a basement, it was possible to derive an assessment of the observed additional 11.4 dB - 18.3 dB attenuation of the RSP in the outdoor-to-basement communication regarding the typical signal reception on a building floor (OUT2IN).

Authors

• dr inż. Piotr Rajchowski link open in new tab ,
• dr hab. inż. Jarosław Sadowski link open in new tab ,
• mgr inż. Olga Błaszkiewicz link open in new tab ,
• dr inż. Krzysztof Cwalina link open in new tab ,
• mgr inż. Alicja Olejniczak link open in new tab