This page lists research topics. In each case we identify key collaborators (if any), Ph.D. students (if any), federal funding (if any), and the years we actively published in the area.

Transmission capacity overview
Primary Collaborators:
Jeffrey G. Andrews, Gustavo de Veciana, Nihar Jindal, Xiangying Yang
Research Funding:
NSF CCF-0635003 and DARPA W911NF-07-1-0028
Years Active:
Wireless networks are becoming ever more pervasive, and the correspondingly denser deployments make interference management and spatial reuse of spectrum defining aspects of wireless network design. Understanding the fundamentals of the performance and behavior of such networks is an important theoretical endeavor, but one with only limited success to date. Information theoretic approaches have been most successfull when applied to small isolated networks, where background interference and spatial reuse are not considered. Large network approaches, typified by transport capacity scaling laws, have given considerable insight into scaling laws, but are generally unable to quantify the relative merits of candidate design choices or provide a tractable approach to analysis for spatial reuse or the SINR statistics. Our hope for the transmission capacity framework has been to develop a tractable approach to large network throughput analysis, that while falling short of information theory's ideals of inviolate upper bounds, nevertheless provides a rigorous and flexible approach to the same sort of questions, and ultimately provides the types of broad design insights that information theory has been able to achieve for small networks.
[1] Steven Weber, Jeffrey G. Andrews, "Transmission capacity of wireless networks", In Foundations and Trends in Networking, vol. 5, no. 2--3, pp. 109-281, 2012. [bibtex] [pdf]
[2] Steven Weber, Jeffrey G. Andrews, Nihar Jindal, "An overview of the transmission capacity of wireless networks", In IEEE Transactions on Communications, vol. 58, no. 12, pp. 3593-3604, 2010. [bibtex]
[3] Jeffrey G. Andrews, Radha Krishna Ganti, Martin Haenggi, Nihar Jindal, Steven Weber, "A primer on spatial modeling and analysis in wireless networks (invited article)", In IEEE Communications Magazine, 2010. [bibtex]
[4] Jeffrey G. Andrews, Steven Weber, Martin Haenggi, "Ad hoc networks: to spread or not to spread?", In IEEE Communications Magazine, vol. 45, no. 12, pp. 84-91, 2007. [bibtex]
[5] Steven Weber, Xiangying Yang, Jeffrey G. Andrews, Gustavo de Veciana, "Transmission capacity of wireless ad hoc networks with outage constraints", In IEEE Transactions on Information Theory, vol. 51, no. 12, pp. 4091-4102, 2005. [bibtex]
[6] Steven Weber, Moshe Kam, "Computational Complexity of outage probability simulations in mobile ad-hoc networks", In Proceedings of the 39th annual conference on information sciences and systems (CISS), Baltimore, MD, 2005. [bibtex]
[7] Steven Weber, Xiangying Yang, Gustavo de Veciana, Jeffrey G. Andrews, "Transmission capacity of CDMA ad-hoc networks", In Proceedings of the 8th IEEE International Symposium on Spread Spectrum Techniques and Applications (ISSSTA), Sydney, Australia, 2004. [bibtex]
Simulation and optimization of wireless networks: OMAN
Primary Collaborators:
Moshe Kam, Kapil R. Dandekar
Primary Students:
Lex Fridman, Jeffrey Wildman
Research Funding:
Years Active:
Over the past ten years, my collaborators and students and I have worked with representatives from the U.S. Army Communications-Electronics Research Development and Engineering Center (CERDEC) on the design of a software program capable of simultaneously simulating the performance of and optimizing design of large-scale mobile ad hoc networks (MANETs). The software package is called OMAN, for Optimization of Mobile Ad hoc Networks. Roughly, the idea behind the project is to combine the best aspects of simulation with the best aspects of optimization into a cohesive framework. The software is cross-layer, with extensive development of i) power control algorithms at the physical layer, ii) medium access scheduling algorithms at the MAC layer, iii) ad hoc routing algorithms at the network layer, iv) flow and flow control algorithms at the transport layer, and v) multimedia encoding algorithms at the application layer. In addition, there is extensive development of detailed terrain and channel models, as well as a variety of node group mobility algorithms. Over the course of developing this software, we have published a series of case studies illustrating its use in various large-scale design problems where the associated design optimization problem is not amenable to analytical attack, and therefore must be addressed numerically or heuristically, or both.
[1] Lex Fridman, Steven Weber, Charles Graff, David Breen, Kapil R. Dandekar, Moshe Kam, "OMAN: a mobile ad hoc network design system", In IEEE Transactions on Mobile Computing, vol. 11, no. 7, pp. 1179-1191, 2012. [bibtex]
[2] Lex Fridman, Steven Weber, Charles Graff, Moshe Kam, "Path planning for network performance", In Proceedings of the 50th Annual IEEE Global Communications Conference (Globecom), Washington, DC, 2007. [bibtex]
[3] Lex Fridman, Dan Hennessey, David Breen, Steven Weber, Moshe Kam, "Visualization of resource allocation in large-scale mobile ad hoc networks", In Advances in Visual Computing (Proceedings of the 3rd International Symposium on Visual Computing (ISVC)), Springer Lecture Notes in Computer Science (LNCS), vol. 4841, Lake Tahoe, NV, pp. 554-563, 2007. [bibtex]
[4] Lex Fridman, Steven Weber, Kapil R. Dandekar, Moshe Kam, "Cross-layer multicommodity capacity expansion on ad hoc wireless networks of cognitive radios", In Proceedings of the 42nd Conference on Information Sciences and Systems (CISS), Princeton, NJ, 2008. [bibtex]
[5] Lex Fridman, Richard Primerano, Steven Weber, Moshe Kam, "Cooperative surveillance in video sensor networks", In Proceedings of the 2nd ACM/IEEE International Conference on Distributed Smart Cameras (ICSDC), Stanford, CA, 2008. [bibtex]
[6] Lex Fridman, Steven Weber, Vijay Kumar, Moshe Kam, "Distributed path planning for connectivity under uncertainty by ant colony optimization", In Proceedings of the 27th American Control Conference (ACC), Seattle, WA, 2008. [bibtex]
[7] Lex Fridman, Pragnesh Jay Modi, Steven Weber, Moshe Kam, "Communication based motion planning", In Proceedings of the 41st Conference on Information Sciences and Systems (CISS), Baltimore, MD, 2007. [bibtex]
[8] Lex Fridman, Richard Grote, Steven Weber, Kapil R. Dandekar, Moshe Kam, "Robust optimal power control for ad hoc networks", In Proceedings of the 40th Annual Conference on Information Sciences and Systems (CISS), Princeton, NJ, 2006. [bibtex]