Dr. Hosam El-Ocla, P. Eng.

Computer communications, networks, and protocols. Electromagnetic waves propagation and scattering in random media. Software programming and simulation.

My research in the fields of computer networks and protocols has been focused on the call admission control (CAC) techniques in ATM networks. I have integrated the problem of CAC together with the bandwidth and buffer allocation. I developed two models for admission control module in ATM networks nodes based on the queuing theory. Using the network performance parameters including cell loss probability (CLP), channel capacity, and call duration, the models find a "best" route, if it exists, that is able to meet the quality of service (QoS) constraints imposed by the user. Further research on the other different internetworking protocols such as TCP/IP networks will be considered.

For the radar detection of a conducting target of finite size in random medium, I have used a method that solves the problem of wave scattering from targets as a boundary value problem. This method is based on general results of both the separate studies on wave scattering from a conducting body in free space and on wave propagation and scattering in random media. Also, this method is useful for obtaining the scattered wave from the conducting targets and to show effects of random media on the scattered waves by estimating the current on the whole target's surface and not only on the illumination region as in the physical optics method. Using this method, results and numerical analysis have been presented, in my different publications, for the angular correlation function, radar cross-section (RCS), and backscattering enhancement of convex and partially convex targets.

Programming simulation is used to evaluate the performance of different techniques and parameters in my research.