LonWorks网络技术研究

【作者】 蔡潋滟；

【导师】 吴燮华； 吴建德；

【作者基本信息】 浙江大学 ， 电力电子与电力传动， 2003， 硕士

【摘要】 本文从设计小区智能化管理网络系统这一应用出发，详细介绍了Lon Works节点的设计过程，包括软硬件的设计，并给出已经获得成功的应用例子；提出了多种Lon Works网络与其他网络互连的方案并进行比较；通过一个简单例子介绍了DDE原理以及PC机应用软件的设计。对EIA-709标准进行了介绍，详细分析了各层协议原理，尤其是可预测p坚持CSMA、带身份验证的请求——应答服务等，并分别与TCP／IP协议的各层进行比较。并在此基础上，提出了优化Lon Works应用的多种新方法：Lon Works中多个定时器值的计算、Lon Works节点网络映象的修改、自安装节点的设计以及自行组建Lon Works网络方案。经过实验证实，采用这些方法，可以降低Lon Works的设计开发和组建的费用，有效地解决了Lon Works应用成本较高这一问题，同时给Lon Works应用带来了很大灵活性。更多还原

【Abstract】 This paper starts with the application of intelligent control of residence zone, explains how to design a LonWorks node in details, including the design of software and hardware, with some successful examples. It also presents a series of way to connect LonWorks network with other networks and explains them with comparison. With a simple example, it introduces the DDE and the design of application software. Furthermore, this paper focuses on the EIA-709 standard, explains each layers of it at length, especially the predictive p-persistent CSMA, Request-Response with authentication etc, and compares EIA-709 with TCP/IP. Based on the above, the paper gives some techniques to use LonWorks much better: calculating the value of the timers, modifying the network image of a LonWorks node, designing a selfjnstalled node and constructing the LonWorks network without the tools such as LonMaker. Approved by the experiments, these techniques can reduce the expenditure of design and construction, solve the high_cost problem of LonWorks application, and also improve the flexibility of LonWorks at the same time.更多还原