| Summary: | 碩士 === 國立成功大學 === 電機工程學系碩博士班 === 91 === Node mobility not only keeps the topology of a mobile ad hoc network changing but also complicates the routing. A previous e ective routing path may become useless due to the movement of nodes in the path. Many protocols have been proposed to solve the routing problem in mobile ad hoc networks, such as DSR, AODV, and DSDV.
These routing protocols were measured in the environments where only single-channel communication was available. Neighboring nodes cannot transmit data at the same time due to signal interference. In many other wireless environments using multiple channels,neighboring nodes are able to transfer messages simultaneously if di erent channels are used. Therefore, the least hop count is not the only factor to determine a good routing path. Reducing the number of shared intermediate transmission nodes is also important. This thesis describes an implementation of the IEEE 802.11 MAC layer with the multi-channel capability on NS2. In addition, an on-demand route algorithm for multi-channel
wireless environments was developed. Experimental results show that the ODMC algorithm improved the transmission performance in multi-channel mobile ad hoc networks.
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