University Of Peloponnese Faculty of Economy, Management and Informatics Department of Informatics and Telecommunications Loughborough (UK) Tripoli (Greece) Michael Batistatos (Laboratory Teaching Staff)
http://wmclab.uop.gr/
RF measurements
Electromagnetic Radiation Measurements
Electromagnetic Radiation Measurements - BS
Electromagnetic Radiation Measurements - Mobile No L.O.S. Τέλος Διαδρόμου με θόρυβο 800.2ΜΗz,BW:200KHz 40,00 35,00 Official Radiation Level Limit in Greece: ~ 30V/m 30,00 25,00 V/m 20,00 15,00 10,00 Radiation Level Limit (according to bionitiative report): ~ 0,618 V/m 5,00 0,00 1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 61 65 69 73 77 81 85 89 93 97 101 105 109 113 Measurement Number (0-14s) L.O.S. BASKET 800.2MHz, BW:200Mhz 12,00 10,00 8,00 V/m 6,00 4,00 2,00 0,00 1 13 25 37 49 61 73 85 97 109 121 133 145 157 169 181 193 205 217 229 Measurement Number(0-30s) Electric Field Strength measurement when the mobile phone is transmitting in GSM mode
Mobile Communications – Network Failure High capacity demand (many users, streaming service etc.) Emergency situation where the local infrastructure is damaged Remote/ underserved areas
Possible Answer to Network Failure – Flying Relays Flying relay for extending communication range Flying relay for assisting the network capacity (flying relays challenges in Appendix – slide 24)
UAV Measurement Equipment - Procedure Samsung Galaxy SIII - Nemo Handy software 1 st step: Measurement 2 nd step: Data Analysis Nemo Analyze Pro Software
LTE Air Measurements Antenna radiation pattern measurement LTE measurement above the city
LTE Air Measurements – Rural Area Status: 4G signal is not reaching the remote area (point A) Our goal: To obtain 4G signal
Received Power (RSRP) – Rural Area The UAV receives signal from the base stations above 195 meters (For further details please read slide 25 in Appendix)
LTE Air Measurements – Urban Area Status: Overloaded base station Our goal: to access more base stationsand redirect network traffic
Received Power (RSRP) – Urban Area The UAV “sees” only 3 base stations on the ground, but up to 14 when it flies (For further details please read slide 26 in Appendix)
Number of Visible Cells Vs Altitude – Urban Area The UAV “sees” only 3 base stations on the ground, but up to 14 when it flies
Flying Relays / Base Stations - Simulations Software tools for UAV-assisted-multitier-cellular-networks simulation UAVs act either as a flying base station or as a transparent relay. (For further details please read slide 27 in Appendix)
More UAV Projects – Remote Sensor Data Collection
More UAV Projects – UAV management through cellular network Solidakis, George; Tsokas, Fanourios; Batistatos, Michael; Sagias, Nikos; Tsoulos, George; Zarbouti, Dimitra; Athanasiadou, Georgia (2017): An Arduino-Based Subsystem for Controlling UAVs Through GSM . International Conference on Modern Circuits and Systems Technologies (MOCAST), Thessaloniki, Greece,2017
More UAV Projects – UAV Service-on-Demand Management Servise-on-demand user interface
More UAV Projects - Rescue Drone Rescue Drone ● Boat Detection ● Rescue Alarm ● Location Transmission ● Course Calculation (according to the wind, water currents) Boat – War Refugees ● Payload transportation Island – Base Station (water, lifejackets)
More UAV Projects – Rescue Drone : Drones4Sea
Wireless and Mobile Communications Lab Thank you !!!
Appendix - Flying Relays – Telecommunications Challenges UA V “sees” the antenna sidelobes Received Power ??? Interference Signal-to-Interference plus Noise Ratio (SINR) - QoS ??? Path loss model ???
Appendix - Signal-to-Interference over Noise Ratio (SINR) Rural Area
Appendix - Signal-to-Interference over Noise Ratio (SINR) Urban Area
Appendix – Simulation Results UAV Antenna / Steering issue Ground BS typical antenna M. C. Batistatos, D. A. Zarbouti, G. V Tsoulos, and G. E. Athanasiadou, “Flying Relays for 4G Service-on-Demand Applications,” in 10th European Conference on Antennas and Propagation (EuCAP 2016) , 2016.
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