Michael Batistatos (Laboratory Teaching Staff) - - PowerPoint PPT Presentation

University Of Peloponnese

Faculty of Economy, Management and Informatics Department of Informatics and Telecommunications

Michael Batistatos

(Laboratory Teaching Staff)

Tripoli (Greece) Loughborough (UK)

http://wmclab.uop.gr/

RF measurements

Electromagnetic Radiation Measurements

Electromagnetic Radiation Measurements - BS

No L.O.S. Τέλος Διαδρόμου με θόρυβο 800.2ΜΗz,BW:200KHz

0,00 5,00 10,00 15,00 20,00 25,00 30,00 35,00 40,00 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) V/m

L.O.S. BASKET 800.2MHz, BW:200Mhz

0,00 2,00 4,00 6,00 8,00 10,00 12,00 1 13 25 37 49 61 73 85 97 109 121 133 145 157 169 181 193 205 217 229 Measurement Number(0-30s) V/m

Electric Field Strength measurement when the mobile phone is transmitting in GSM mode

Electromagnetic Radiation Measurements - Mobile

Official Radiation Level Limit in Greece: ~ 30V/m Radiation Level Limit (according to bionitiative report): ~ 0,618 V/m

Mobile Communications – Network Failure

High capacity demand (many users, streaming service etc.) Remote/ underserved areas Emergency situation where the local infrastructure is damaged

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

1st step: Measurement 2nd 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

Rescue Drone

More UAV Projects - Rescue Drone

Island – Base Station Boat – War Refugees

• Boat Detection
• Rescue Alarm
• Location Transmission
• Course Calculation

(according to the wind, water currents)

• Payload transportation

(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

UAV Antenna / Steering issue Ground BS typical antenna

Appendix – Simulation Results

• 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.