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Design and Implement of Multi-Port Network Communication Platform

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Tutor: YangXiaoZong
School: Harbin Institute of Technology
Course: Computer Science and Technology
Keywords: Sensor network,Ad Hoc network,Multi-port network platform,Dynamic Access
CLC: TN929.5
Type: Master's thesis
Year:  2008
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Abstract:
At present, our country is in the period of history during which information is constructed. All departments and units have built networks in their respective fields, including Sensor network, Ethernet and Ad Hoc network, etc. However, these networks cannot interconnected because of their different categories and interfaces. Firstly, we need to solve the problem of different interfaces based on the wireless protocols, communication equipment and interface protocols of current networks, and then implement the interconnection between wireless networks (such as Sensor network) and wired networks (such as Ethernet). Secondly, we propose a dynamic access strategy based on the multi-gateway, which can achieve load balancing of wireless sensor networks and the Internet connection.The chapter II and chapter III of this paper proposed a multi-port network communication. The platform can transform different protocols of four different networks based on the source address and destination address of the node. In this way, Ad Hoc using AODV protocol, wireless sensor networks using SPIN, the interconnection of different networks is realized. In our design, we paid high attention on the different data form at each node, and wireless LAN and Internet using IP protocol which has become a standard today, the gateway module composited by the frame format conversion sub-module, subnet judgment sub-module and the address learned database sub-module. we paid high attention on the different data form at each node, and then chose the most suitable data form to transform and transmit. Focus on four different networks, this paper presented a detailed design of protocol transformation and simulated on OPNET. What is more, by measuring the transmission delay between two nodes (the average time cost of data transmission from source node to destination node), Load, and positive data transmission rate (ratio between the number of actually arrived data packages and the number of expected data packages), we proved the stability of the transmission which indicates the feasibility of our multi-port network platform. The chapter IV and Chapter V of this article propose a dynamic access strategy. Based on the strategy, we can achieve load balancing of wireless sensor networks and the Internet connection. In the strategy, we have the detailed design to select the best of Sink nodes and agent nodes, and the data packets and the routing tables of data structure, and sensor node data access process. We also simulated on OPNET. By measuring the transmission delay between two nodes, throughput and Internet access time, which is the time when the energy of agent node depletion, wireless sensor networks and Internet do not communicate.
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