wireless Mesh network

Based on the banyan-tree topology railway wireless Mesh network having the advantages of bus and star topology which makes broadband Internet to be along the railway line provides a more reasonable solution. However, unlike traditional wireless campus and enterprise networks, railway wireless Mesh network usually has the coverage of geographical span as long as hundreds of thousands of kilometers. How to make this new network form to ensure effective management for highly efficient data communications has become one of the key issues on the application of the Internet to the train.In support of users'fast-moving, railway wireless Mesh network generally realizes data communications by MAC packet forwarding program. Therefore, this paper firstly deeply analyses the basic functions of the MAC Bridge according to IEEE 802.1d-2004 protocol and based on the Linux open source codes focuses on an analysis of realization and processing of MAC packets forwarding in the Linux kernel. In the wing, by a detailed analysis of the railway wireless Mesh network structure and application requirements the author finds out the shortcomings and deficiencies of the traditional packet forwarding strategies and the network management protocol;