Networking and Communication Engineering

Ayman E. A. Abdelaal ¹, Fathi E. Abd El-Samie ², Moawad I. Dessouky ¹

Affiliations
1 Menoufia University, EG
2 Department of Electronics and Electrical Communications, Menoufia University, Menouf, EG

Abstract

The demand on high bandwidth internet connections and applications is growing very fast due to the variety of internet arising usage either on business or entertainment. The Internet Service Providers (ISPs) have to enhance their internal networks in terms of bandwidth utilization and resources management. Two different technologies have been provided to help in solving the bandwidth utilization issues inside the ISPs networks, the diffserv Quality of Service (diffserv-QoS) and the Multi-Protocol Label Switching-Traffic Engineering (MPLS-TE). In this paper, the two technologies are used in conjunction with each other to get the highest performance, the best resources management and the efficient bandwidth utilization.

Keywords

MPLS-TE, Diffserv-QoS, VPN.

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Rania A. Ghazy ¹, El-Sayed M. El-Rabaie ², Moawad I. Dessouky ², Nawal A. El-Feshawy ³, Fathi E. Abd El-Samie ³

Affiliations
1 Department of Electronics and Communications, Menoufia University, Menouf, EG
2 Department of Electronics and Communications, Menoufia University, Menouf-32952, EG
3 Department of Electronics and Communications, Menoufia University, Menouf-32952, EG

Abstract

Intrusions and attacks have become a very serious problem in network world. This paper presents a statistical characterization of packet counts that can be used for network intrusion detection. The main idea is based on detecting any suspicious behavior in computer networks depending on the comparison between the correlation results of control and data planes in the presence and absence of attacks using histogram analysis. Signal processing tools such as median filtering, moving average filtering, and local variance estimators are exploited to help in developing network anomaly detection approaches. Therefore, detecting dissimilarity can indicate an abnormal behavior.

Keywords

Anomaly Detection, Statistics, Network Intrusion Detection Systems (NIDS).

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Rania A. Ghazy ¹, El-Sayed M. El-Rabaie ², Moawad I. Dessouky ², Nawal A. El-Feshawy ², Fathi E. Abd El-Samie ²

Affiliations
1 Menoufia University, Menouf, EG
2 Department of Electronics and Communications, Menoufia University, Menouf-32952, EG

Abstract

This Paper proposes a network based intrusion detection approach using anomaly detection in the presence of Denial of Service attacks (DoS). Flood based attacks are a common class of DoS attacks. DoS detection mechanisms that aim at detecting floods mainly look for sudden changes in the traffic and mark them anomalous. In this approach, network traffic is decomposed into control and data planes to study the relationship between them. As the data traffic generation is based on control traffic, the behavior of the two planes is expected to be similar during normal behavior. Therefore, detecting dissimilarity between the traffic of the two planes can indicate an abnormal behavior. Toward that objective, an Auto Regressive (AR) model has been used. Simulation results show that both the accuracy of the detection and less false positives.

Keywords

Auto Regressive (AR), Denial-of-Service (DoS), Network Intrusion Detection Systems (NIDS).

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Emad. A. Elaty ¹, Abd-Elnaby Mohammed ², Sami A. El-Doli ³, Fathi E. Abd El-Samie ³

Affiliations
1 Department of Electronics and Electrical Communications, Higher Institute of Engineering, El Shorouk Academy, El Shorouk City, EG
2 Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University, Menouf, EG
3 Department of Electronics and Electrical Communications, Menoufia University, Menouf, EG

Abstract

In the helicopter-Satellite Communication (H-SATCOM) the periodic blockage of the received signal due to rotor blades and carrier frequency fluctuation due to Doppler shift are two dominant impairments. This paper investigates the performance of a Helicopter–Satellite communications system from an analytical view point under conditions such as the periodic blockage due to rotor blades, time diversity transmission technique, and Viterbi decoding technique. Bit Error Probability is considered as the performance metric. The deduced mathematical expressions for periodic blockage, time diversity transmission technique, and Viterbi decoding are matched well with those resulting from simulations. Hence our analysis can be considered as a theoretical platform for further modification, development, and guidance for originating application. Also it gives precision, direction for problem solution, and system control.

Keywords

Helicopter-Satellite Communication (H-SATCOM), Bit Error Rate (BER).

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