Alhussein Abouzeid Research:



Systems: Communication Networks; Wireless Ad Hoc and Sensor Networks; Peer-to-Peer Networks.

Applied Theory: Stochastic Processes; Algorithm and Protocol Complexity; Multi-layer Optimization; Information Theory; Queuing Theory.



Project "Transport": Transport and Congestion Control in Hybrid and Wireless Ad Hoc Networks


TCP is the predominant Transport Control Protocol in the Internet, reportedly responsible for carrying 95% of Internet traffic. However, the wireless mobile network environment introduces two new components that were not considered in the design of TCP [30] for previous traditional wired networks; mobility and wireless communications. The problems that hinder TCP performance over wireless mobile networks can be traced to a mismatch between the inherent assumptions in the design of TCP and actual conditions of operation in the wireless mobile network environment. I have worked extensively on TCP-related problems. The work can be categorized depending on the attributes of the networking environment to (i) Wireless Access: situations where a possibly mobile user accesses an infrastructure network using a last-hop wireless link. (ii) Wired Infrastructure Network: Analysis of the interaction between multiple competing TCP and non-TCP flows over a network of traditional as well as Active Queue Management routers, with multiple transport-layer differentiated service classes. (iii) Mobile Wireless Network: Analysis of TCP with abrupt RTT changes. This work resulted in key new insights and analytical modeling contributions to the area of TCP modeling.

Key Publications:

A.A. Abouzeid and S. Roy, Stochastic Modeling of TCP in Networks with Abrupt Delay Variations, Wireless Networks, vol. 9, no.5 pp. 509-524, September 2003.

A.A. Abouzeid, S. Roy and M. Azizoglu, Comprehensive Performance Analysis of a TCP Session over a Wireless Fading Link with Queuing, IEEE Transactions on Wireless Communications, vol. 2, no. 2, pp. 344-356, March 2003.

A.A. Abouzeid and S. Roy, Modeling Random Early Detection in a Differentiated Services Network, Computer Networks, vol. 40, no. 4 pp.537-556, November 2002.