| Wireless Ad Hoc network which is operated without any infrastructure, quick deployment and easy establishment of communications has experienced the widespread used. The salient features of these networks that they can freely and dynamically self-organize into arbitrary and temporary network topologies are different from Internet wired networks and cellular mobile networks. These features also cause a problem that the capacity of networks which is confined. Multi-Channel is one of the mostly effective methods to solve the problem. Researchers have proposed some multiple access and multi-hop route protocols in recent years. But these protocols mostly focus on theoretical research and were verified through simulating on computer. So there is a need that we should set up a platform worked in a real wireless physical environment to verify performance characteristics and find problems.This article designed a new multi-channel ad hoc networks protocols and implemented a visual demonstrative experiment platform on the system of Linux based on summarized the problem of confined capacity and analyzed the present multi-channel MAC protocols of ad hoc networks. This protocol whose MAC protocol is 802.11 MAC, channel assignment method employed is dedicated control channel assignment, exchanging information of nodes and channels is achieved from the data packets, selected data channel in accordance with certain strategy has been setted up in the visual demonstrative platform of Linux. From the result of experiment, it is concluded that implemented multi-channel protocol of ad hoc networks can improve the capacity of networks and the performance of visual demonstrative experiment platform of Linux is stable and reliable. |
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