Networking and Communication Engineering

S. EL-Rabaie ¹, D. Nabil ², R. Mahmoud ², Mohammed A. Alsharqawy ²

Affiliations
1 Dept. of Communication Engineering, 32952 Menouf, EG
2 Egyptian Radio & Television Union (ERTU), Cairo, EG

Abstract

Underwater wireless sensor networks (UWSNs) are becoming popular everyday due to their important role in different applications, such as offshore search and underwater monitoring. Underwater wireless sensor networks face unique conditions. Therefore, particular routing protocols are needed to route the packets from a source to a destination. Moreover, numerous UWSN’s applications require deploying the security issue; which routing protocols don’t take in consideration. A survey on UWSN architectural view and the routing protocols used for UWSNs are given in this paper. The routing protocols studied and compared with respect to packet delivery ratio, packet delay, energy consumption. Priority and drawbacks of each routing protocol are listed. In addition, a survey of the security issue for UWSNs is presented, and the security requirements in order to secure communication medium in this environment are listed.

Keywords

WSN, UWSN, Application, Design, Geographical Routing, Security.

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E. M. El-Bakary ¹, O. Zahran ², S. EL-Rabaie ³, F. E. Abd El-Samie ⁴

Affiliations
1 Department of Electronics and Electrical Communications, Menoufia University, Menouf 32952, EG
2 University of Liverpool, GB
3 Electronics and Communications Eng., Menoufia University, EG
4 Menoufia University, EG

Abstract

This paper presents a chaotic interleaving approach for efficient video transmission with orthogonal frequency division multiplexing (OFDM) with equalization over fading channels. The SPIHT compressed video is converted to luminance and chrominance approach and converted to binary data. The binary data is interleaved with the proposed approach prior to the modulation step. The chaotic Baker map is used in the proposed interleaving approach. In addition to reducing the channel effects on the transmitted data, the proposed chaotic interleaving approach adds a degree of encryption to the transmitted data. The performance of the proposed approach is tested by the transmission of SPIHT compressed video frames over Rayleigh fading channels with chaotic interleaving. Experimental results show that video frames are received with higher peak signal-to-noise ratios (PSNRs) if chaotic interleaving is applied. We also propose an efficient technique to reduce the effects of both multiple access interference (MAI) and intersymbol interference (ISI) in wireless OFDM systems. A hybrid scheme comprising randomization of SPIHT video frames at the transmitter and a regularized equalizer at the receiver unit is suggested and studied. Then, the regularized equalizer is used to reduce the effect of ISI and provide a better estimate of the data. The performance of the proposed scheme is studied and compared with traditional schemes. Our simulation results show a noticeable performance improvement by using the proposed scheme.

Keywords

Video Processing, SPIHT Video Compression, OFDM, and Chaotic Map.

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