Y. Abdelmalek

CUNY Graduate Center, New York City, New York, United States

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Publications (7)0 Total impact

  • Y. Abdelmalek, A.A. El Al, T. Saadawi
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    ABSTRACT: In this paper, we address the problem of collaborative video caching in ad hoc mobile networks. We consider network portraying static video server with wired interface to gateway node that is equipped with wireless interfaces, other nodes are requiring access to the video streams that is stored at video server. In order to reduce the average access latency as well as enhance the video accessibility, efficient video caching placement and replacement strategies are crucial at some of the distributed intermediate nodes across the network. Virtual backbone caching nodes will be elected by executing caching placement algorithm after running the routing protocol phase. The simulation results indicate that the proposed collaborative aggregate cache mechanism can significantly improve the video QoS in terms of packet loss and average packet delay.
    Integrated Network Management, 2009. IM '09. IFIP/IEEE International Symposium on; 07/2009
  • Y.M. Abdelmalek, T.N. Saadawi
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    ABSTRACT: In this paper, we propose Destination-Assisted Routing Enhancement (DARE) module as a generic add-on middleware to mobile ad-hoc networks (MANETs) routing protocols. The goal of DARE is to assist the routing protocol to establish a path between the source and destination quickly with high reachability probability by generating destination beacon packets, while considering the dynamic characteristic of MANET and the need for low routing control overhead. These beacon packets act like trail packets to aid in finding the destination. A simplified mathematical model as a proof of concept is presented. We prove that the probability of finding the path between the source and destination using DARE outperforms the same probability using the traditional routing technique. The simulation results show the potential of adding DARE middleware to DSR protocol; for an instance of on-demand ad-hoc routing protocols, to achieve higher network performance in terms of throughput, route discovery time, and connection setup probability. A route discovery time was reported to be 20% less than the original DSR in mobile ad-hoc nodes with minimum overhead.
    Sarnoff Symposium, 2009. SARNOFF '09. IEEE; 05/2009
  • Y. Abdelmalek, A. Abdelal, T. Saadawi
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    ABSTRACT: Video transmission is becoming an increasingly essential part of the current Internet; however before the high video quality at the client side becomes a reality, the best effort model has to adapt the video characteristic to the network conditions. In this paper, we are proposing a media middleware component that can be added to the edge routers in DiffServ network in order to have the responsibility to enhance QoS at the receivers' side. Passing such video frames to differentiated service network increases the video quality and treats the video frames based on their priorities. The media aware sub-layer has the responsibility to cache high priority video frames. We demonstrate through network simulation that the proposed technique decreases the average packet delay, and the packet loss, which yields a better video quality at the clients compared to existing techniques.
    Consumer Communications and Networking Conference, 2009. CCNC 2009. 6th IEEE; 02/2009
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    Y. Abdelmalek, A. Abd, T. Saadawi
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    ABSTRACT: In this paper, we study a mechanism which allows the sender application to mark video packets based on its importance in reconstructing the video. Passing such video frames to differentiated service (DiffServ) network increases the video quality and treats the video frames based on their priorities. A media aware sub-layer has been added to the edge routers in DiffServ network. The media aware sub-layer has the responsibility to cache high priority video frames. We demonstrate through simulation that the proposed mechanism decreases the average packet delay, and the packet loss. This in turn produces a better video quality at the clients than produced under the existing techniques.
    Military Communications Conference, 2008. MILCOM 2008. IEEE; 12/2008
  • Y. Abdelmalek, O. Hussien, T. Saadawi
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    ABSTRACT: A simplified receiver assisted routing enhancement (S-RARE) protocol is proposed. The S-RARE technique is a generic add-on middleware to MANET routing algorithms. A simplified mathematical model is presented using the probabilistic technique. In this paper, we used the principle of the biologically inspired ant routing technique as example to implement the S- RARE algorithm. The similarities and differences between S-RARE and the traditional ant technique have been highlighted. The S-RARE quickly finds a path between the source and destination with low overhead. S-RARE technique performs better in highly dynamic network topology. The performance of the proposed S-RARE is simulated and compared to the traditional ant in radio network model (random graph model). The simulation results show the significant improvement when S-RARE technique is set up as add-on module on top of traditional ant work.
    Telecommunications, 2008. AICT '08. Fourth Advanced International Conference on; 07/2008
  • Y. Abdelmalek, O. Hussien, T. Saadawi
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    ABSTRACT: This paper shows a novel technique for routing protocol in ad hoc network, namely simplified receiver assisted routing enhancement (RARE). Simplified mathematical model has been explained to analyze the performance of RARE algorithm. In this algorithm, we use the principle of the biologically inspired ant routing technique to evolutionally maintain the routing information. The similarities and differences of RARE and the traditional ant technique have been highlighted. The RARE concept is implemented to increase the probability to find the destination and decrease the connection set up time between the source and the destination. The performance of the proposed RARE is simulated and compared to the traditional ant [1]–[2] in radio network model (random graph model). The simulation result shows the potential of RARE to achieve higher probabilities to find the destination. More, the RARE can be used as an add-on module to many ad hoc routing protocols.
    Bio-Inspired Models of Network, Information and Computing Systems, 2007. Bionetics 2007. 2nd; 01/2008
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    ABSTRACT: There has been a surge of interest in the delivery of real-time applications to heterogeneous receivers over the Army network in the recent years. The real-time applications such as imagery and video when transmitted in a multicast environment are still challenging. The challenges are mainly due to the potential for a large number of receivers with different heterogeneous capabilities such as reception rate, client's buffers, processing speed rate, etc and the sensitivity of the real-time media, in terms of average packet delay, packet loss, etc. In an attempt to improve the real-time media at the receivers' side, we propose a mechanism that gives the receiver dynamic ability to move from one multicast group to another based on the receiver capabilities and the network conditions. We demonstrate through simulation that the proposed mechanism enforces fairness between the receivers and that the video quality adaptation is smooth so that the impact on the perceptual quality at the client is minimal.
    Military Communications Conference, 2007. MILCOM 2007. IEEE; 12/2007