Enhancing video transmission in MANETs utilizing multiple interfaces and multiple channels per node C. Bouras 1,2 , A. Gkamas 4 , V. Kapoulas 1 , D. Politaki 2 , and E. Tsanai 2 1 Computer Technology Institute and Press “Diophantus”, Patras, Greece 2 Computer Engineering and Informatics Dept., University of Patras, Patras, Greece 4 University Ecclesiastical Academy of Vella, Ioannina, Greece {bouras, kapoulas}@cti.gr, gkamas@aeavellas.gr {politaki, tsanai}@ceid.upatras.gr Abstract. Mobile Ad hoc NETworks (MANETs) are becoming more essential to wireless communications due to growing popularity of mobile devices. MANETs are also essential in Emergency Response situation where network information flow between deployed units is vital. In such cases voice and video transmission is essential to form a global view of the situation and decide on action. However, MANETs do not seem to effectively support multimedia applications and especially video transmission. In this work we propose a simple and efficient channel selection mechanism for enhancing Video Transmission in MANETS that have nodes with multiple interfaces, and can utilize multiple channels at the same time. The mechanism is implemented and tested in the ns-2 network simulator. Simulation results indicate that the mechanism improves the networks capacity for video transmission and reduces the video streams’ packet delay. Keywords. MANETs, Multi-interfaces and Multi-channels, Video transmission. 1 Introduction Disaster management and direct response in emergency situations are currently one of the most important fields of Mobile Ad-hoc Network (MANET) technology and has been under study for the last few years ([1], [2]). This technology has increasingly drawn the attention of communications research communities over the past years and encouraged the attempts of applying it to real time situations. MANETs have significant advantages over traditional telecommunication networks. They are decentralized, self-organized, and capable of restoring communications without depending on any infrastructure. Big catastrophes, over the past few years, have shown that wired telecommunications and common static wireless infrastructures are vulnerable and not efficient for usage when disasters take place. With MANETs, each device equipped with wireless modules can act as a node that may communicate with any other node in the network area over wireless channels supporting multi-hop connections and covering great distances. In addition, compared to traditional telecommunication networks, they are cheaper, because they do not require any infrastructure and more robust, because of their non-hierarchical structure