Carrier-Sense Multiple Access with Transmission Acquisition and Channel-Access Prioritization

Wednesday, November 13th, 2019 at 6:30 PM

TI Auditorium

PROGRAM

6:30 - 7:00 PM Networking & Refreshments
7:00 - 8:00 PM Talks
8:00 - 8:30 PM Panel Session
8:30 - 8:45 PM Speaker Appreciation & Adjournment

Chair: Behnam Dezfouli
Organizer: Comsoc
    

Session Abstract:See below for details...

Refreshments are FREE for this event.

Speaker: Dr. Marcelo M. Carvalho

Bio: Marcelo M. Carvalho received his Ph.D. degree in Computer Engineering from the University of California Santa Cruz (2006), and the M.Sc. degree in Electrical and Computer Engineering from the University of California Santa Barbara (2003). Before that, he also received an M.Sc. degree in Electrical Engineering from the State University of Campinas (1998), and his B.Sc. degree in Electrical Engineering from the Federal University of Pernambuco (1995). Currently, he is an Assistant Professor in the Department of Electrical Engineering at the University of Brasília (UnB). Dr. Carvalho was a Visiting Research Scholar in the Erik Jonsson School of Engineering and Computer Science at the University of Texas at Dallas (2018-2019), and at CONNECT, Trinity College Dublin (2012). He is the co-recipient of the Best Paper Award at IFIP/IEEE Wireless Days 2018, the Strategy Award at MANIAC Challenge 2013, and runner-up for Best Paper Award at ICCCN 2004. He is the Area Co-Chair of Hot Topics in Networking of ICCCN 2020, and he has served as Program Co-Chair of IEEE MASS 2019, and as General Co-Chair of IEEE MASS 2016 and IEEE CARTOON 2014. He has served in the TPC of many IEEE/ACM conferences, and as a reviewer for many journals. In 2010, he was recognized as an Exemplary Reviewer of IEEE Communications Letters. His research interests are in the fields of wireless and mobile networking, Internet of Things, and multimedia communications. He is a member of the IEEE and ACM societies.

Title: Carrier-Sense Multiple Access with Transmission Acquisition and Channel-Access Prioritization

Abstract: Carrier-Sense Multiple Access with Transmission Acquisition (CSMA/TA) and channel-access prioritization will be presented. CSMA/TA is intended for wireless local area networks of stations endowed with half-duplex transceivers and single antennas. It leverages the small turnaround times of current half-duplex radios to increase the likelihood of having the last transmission from a group of overlapping transmissions succeed, especially if turnaround times are smaller or slightly larger than propagation delays. In CSMA/TA, a station senses the channel before sending a pilot and waits for a short time after sending its pilot before sensing the channel again. If the channel is
sensed idle again, the station transmits its data packet. By using appropriate pilot lengths, CSMA/TA allows traffic prioritization at the channel-access level, which supplements traditional output traffic prioritization at stations. It is shown that non-priority CSMA/TA can surpass the performance of such protocols as CSMA, FAMA-PJ, and CSMA/CD if turnaround times are larger than propagation delays, but not too much larger. In addition, it is shown that CSMA/TA can improve traffic prioritization significantly across different traffic classes, under different traffic load proportions, compared to CSMA under the same conditions.