Simulations University of Brescia
Department of Electronics for the Automation A. Flammini, D. Marioli, G. Mazzoleni, E. Sisinni, A. Taroni Email: {alessandra.flammini,giuseppe.mazzoleni,daniele.marioli,emiliano.sisinni,andrea.taroni}@ing.unibs.it Web Site: http://www.ing.unibs.it/~wsnlab/ On-line Coordinator floor noise monitoring (RSSI) in a 2 active channels architecture
Channel selection
Few retries for a fast reconnect time
STAR network topology: isochronous time slots alloca
Simulations University of Brescia
Department of Electronics for the Automation A. Flammini, D. Marioli, G. Mazzoleni, E. Sisinni, A. Taroni Email: {alessandra.flammini,giuseppe.mazzoleni,daniele.marioli,emiliano.sisinni,andrea.taroni}@ing.unibs.it Web Site: http://www.ing.unibs.it/~wsnlab/ On-line Coordinator floor noise monitoring (RSSI) in a 2 active channels architecture
Channel selection
Few retries for a fast reconnect time
STAR network topology: isochronous time slots allocation with ACK (Si)
Simulated Traffic: channel occupation Power spectrum estimation “Sniffer” WUSB
RF section power consumption (@3.3V):
TX: 69mA, RX:60mA
Sleep: µA, Idle: 2.5mA Rshunt=1.5Ω INA110
G=100 LeCroy LT374 Tek
RSA3408A Test Bench:
802.15.4 Coordinator RF consumption
802.15.4 Sensor RF consumption RSSI as evaluated by RF transceivers COORDINATOR COORDINATOR COORDINATOR BPS BPS BPS BPS: battery powered sensor BPS BPS Low transfer rate (tens bps)
Low cycle time (tens s)
Few sensors (Point to Point, Star Topology)
Several insulated star networks Power supply / wired link S1 D Sn D S1 D Sn D Tcycle Additional transceiver to scan all available channels
Reserved “diagnostic” time slot (D) where coordinator computes channels energy
Coordinator dynamically sorts channels according t...
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