Internet of Moving Things using Full Duplex Mesh Networks

SriramVishwanathWirelessNetworkingand

Communica8onsGroup(WNCG)ECE,UTAus8n

Self Interference in Full Duplex

Tx

Rx

ScaBers

Received Signal

Transmit Signal

Reflected Signal DirectPath

x -> received signal z - > transmit signal w-> noise signal

True Full Duplex Radios

•  Possiblethroughself-interferenceisola8onandcancella8on– 110+dBofisola8on/cancella8onnecessary

•  Enableslisten-while-talking– Muchmoreefficientmobilemeshing

•  Cancella8onofselfinterference–  Usingdiscretecomponents

–  110dB•  Singleantenna•  WorkswellwithMIMO

RF Cancellation

Digital Non Linear DF Filter

60-70 dB

50 dB

DSP

Digital Cancell

ation

BB TX

BB RX

DAC

Analog Filters AD

C

RF –Cancellation

Our prototype: 2.4G, 20 MHz, 100 Mbps

Advantages of Full Duplex

Internet of Moving Things (IoMT)

•  Fullduplex+mobilemeshing– Marriagemadeinheaven–  Lowoverhead,highthroughputmeshing

•  Connectpeopleanddevicesastheymove– Astheymove– Discovery,rou8ng,handoffefficient

Testing over actual paths Structured&RandomMovement

Scalable Testing – Great Results