Faisal Ahmad Khan is the Dean of the Faculty of Information and Communication Technology at BUITEMS University Quetta. He is Senior Member IEEE and Fulbright fellow. Dr Khan received BS degree in Software Engineering and MS degree in Telecommunications in 2005 and 2007, respectively, from Bahria University Karachi. He received MS and Ph.D. degrees in Electrical and Computer Engineering from the Georgia Institute of Technology, USA in 2012. He has been working with the Faculty of Information and Communication Technology at BUITEMS since October 2007.
Dr. Khan has worked with the Communications Systems Center (CSC) at Georgia Institute of Technology from Fall 2009 to Spring 2013. His research at CSC focused on Vehicular Ad hoc Networks under the title Safety-Message Routing in VANETs. His research work at Bahria University focused on Radio-Wave Propagation into Buildings and Client-Server Architecture for Cellular Handheld devices. Awards and distinctions to his credit include Fulbright Ph.D. scholarship award 2009-2013, outstanding leadership award IEEE Karachi section 2015, excellence in leadership award by World Confederation of Business, Houston, Texas, 2015; best teacher award BUITEMS 2008.
Dr. Khan has been invited speaker and session chair at a number of international IEEE conferences. More recently, he has been the conference chair of the IEEE ICE Cube Conference 2016. Besides professional undertakings, he is the founder of Quetta Going Green, a citizens' movement for the promotion of environmental awareness in the city of Quetta. He is also the founder of Honesty Mart, an initiative for the promotion of trust and honesty in the society.
Towards Self-driving Cars: Guaranteed Delivery of Safety Messages in VANETs
Self-driving cars have become a reality. Safety message propagation remains the core of the entire concept. Reliability is a critical concern in disseminating safety messages in vehicular ad-hoc-networks (VANETs). Thus far, redundant broadcast (or next relay broadcast) has been used to ensure reliable transfer of safety messages. However, redundant broadcast fails to meet high-reliability requirement owing to lack of a feedback or acknowledgment (ACK) mechanism. A power controlled negative-acknowledgment (NACK) mechanism is can ensure reliable reception of safety messages. Significantly, this can cover vehicles present in transmission holes in the broadcast region. Vehicles in the immediate neighborhood detect and recover safety message for a vehicle present in the transmission hole by estimating propagation loss for the vehicle.
NACK together with hole detection and recovery mechanism nearly guarantees safety-message delivery in VANETs. Reliability of the proposed technique is formulated mathematically with packet reception ratio (PRR) as the reliability metric. Using theoretical analysis and simulation evaluation in ns-3 it can be established that the technique can guarantee safety-message reception by mitigating packet loss caused by interference from hidden nodes, and at instances where vehicles are located in the transmission holes.