PhD Defense: "Delay, Reliability and Trust in Mobile Ad Hoc Networks: A Space-Centric Approach to Routing"

Amir Aminzadeh Gohari

January 6th (Thursday), 4:00pm
Harold Frank Hall (HFH), Rm 4164

In this talk, we establish methodologies for handling high node mobility in wireless ad hoc networks. We present a spatial design framework for the development of scalable ad hoc routing protocols that are capable of providing QoS guarantees (delay, reliability and trust) in high-mobility regime of operation.

In the first part of this talk, we consider the problem of providing delay guarantees by ad hoc routing protocols in high mobility scenarios. The novel aspect of our approach is the attribution of network and MAC layer congestion to space, which enables congestion-aware routing and provides delay guarantees over a much longer duration than that achieved by traditional ad hoc routing protocols. We show that over the duration that the node density and the offered traffic pattern remain roughly invariant, the spatial congestion of the network approximately remains invariant. We present an accurate method for spatial delay estimation between distinct locations, namely “path integration” and derive an upper bound for its estimation error. Furthermore, based on this idea, we develop a congestion-aware routing protocol to enable delay-optimized routing of real-time applications.

In the second part of this talk, we investigate the problem of reliable and trustworthy routing in mobile ad hoc networks. We consider the implications of applying our spatially-based approach to improve the routing reliability through difficult terrains with possibly untrustworthy regions in tactical mobile ad hoc networks. The proposed approach provides maps of spatial reliability and trust, which reflects the probabilities for finding/establishing trustworthy routes between distinct locations and, hence, enables the best possible decisions for selecting a route on demand. We discuss a routing protocol, named “Reliability Map Routing” (RMR), which discovers routes over spatial cells whose local reliability and trust metric are distributed throughout the network via a fast dissemination algorithm.

About Amir Aminzadeh Gohari:

Amir Aminzadeh Gohari is a PhD candidate in the department of electrical and computer engineering at the University of California, Santa Barbara. He received his B.S. and M.S. degrees from Sharif University of Technology, Tehran, Iran. His research interests include MAC layer and routing protocols design and optimization, and quality of service in mobile ad hoc networks.

Hosted by: Professor Volkan Rodoplu