期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2013
卷号：2
期号：6
页码：2348
出版社：S&S Publications
摘要：Medium Access control(MAC) protocol is the most widely used protocol for Adhoc networks. However, in practice,deafness, hidden-terminal, and exposed terminal problems are exaggerated with directional antennas, and they cause thedegradation of the overall network performance. Although there are several random-access-based medium-access control (MAC)protocols being proposed in the literature for networks with directional antennas, the deafness, hidden-terminal, and exposedterminal problems have yet to be fully solved. In this paper, we present a new MAC protocol called the DSDMAC Protocol for wirelessmulti hop Ad Hoc Networks using Directional Antennas. Different from existing protocols, the DSDMAC protocol relies on the dualsensingstrategy to identify deafness, resolve the hidden-terminal problem, and avoid unnecessary blocking. The integrity of theDSDMAC protocol is verified and validated using NS-2, which is a formal protocol network simulation tool. We further develop aanimation scenario to quantify the performance of the DSDMAC protocol and conduct extensive simulations, which verify theaccuracy of the analysis. The protocol verification, analysis, and simulation results show the robustness and superior performanceof the DSDMAC protocol, which can achieve a much higher network throughput and lower delay utilizing the spatial multiplexinggain of the directional antennas. The results presented in this paper show that the proposed DSDMAC protocol can substantiallyoutperform the state-of-the-art protocols.
关键词：Access protocols; ad hoc networks; computer simulation; directional antennas; multiple access; system analysis and;design.
