Omer Mahmoud

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One of the causes of congestion in computer networks is the inherent burstiness of network traffic. Traffic includes unpredictable file or web page transfers as well as variable rate media streams. Traffic shaping means to smooth the traffic as a function of time. Shaping and congestion control is very important especially in cases where Variable Bit Rate(More)
When a mobile node moves and changes its connectivity from one RER to another, the new RER does not have the context unless it is transferred from the old RER. We conducted a study considering a diffserv domain where RERs run TSW scheme to meter the flows and mark the packets. In this paper we present the results of this study, which shows that by(More)
There is a growing interest in providing Internet services to the mobile nodes. When mobile nodes travel from one router's service area to another, the time-sensitive applications may see degradation in service. We investigate into the effects of handoff on service quality of mobile nodes. Several experiments are conducted using various packet-metering(More)
Multicast routing is a key technology for modern communication networks. It sends a single copy of a message from a source to multiple receivers over a communication link that is shared by the paths to the receivers. This is especially appropriate in wireless environments where bandwidth is scarce and many users are sharing the same wireless channels. In(More)
The advantages offered by Image Guided Surgery (IGS) to medical professionals during a minimally-invasive surgical operation are overwhelming. Although a sophistication growth in imaging techniques can provide the surgeon with high quality guidance but there is still a need for more improvement in IGS application such as: computational time which impedes(More)
Femtocell network is a new technology that uses the advantage of an Internet backbone to enhance the cellular coverage in residential or small business areas. However, due to the expected random deployment of the femtocell access point (FAPs), there is a strong probability of interference among the femtocell nodes and between the femtocells and the(More)
Quality of Service (QoS) is the ability of network elements (e.g. application, host and router) to provide some level of assurance for consistent network data delivery. Within a few past decades, QoS is certainly not supported over the IP-based networks. The Internet Protocol offers Best-Effort services to its applications, i.e. there is no QoS commitment(More)
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