BACnet/IP基于UDP的技术解析

The Technology Analyse of Choosing UDP in BACnet/IP

BACnet标准是用于楼宇自控网络的数据通信协议,其作用是使不同厂商的楼宇自控设备能够实现互操作。BACnet/IP则是基于IP技术的BACnet标准,它将IP网络作为自己的局域网来构建大型BACnet网络。BACnet/IP技术的体系结构中构架于IP协议之上的是UDP协议,而不是TCP或自定义的IP协议包,这是与IP网络自身特点、BACnet标准的特点以及TCP和自定义IP协议包的特征限制等因素分不开的。本文通过技术分析说明了只有采用UDP协议,BACnet/IP技术才能够成功并高效地实现将BACnet网络构建于IP网络之上。

BACnet is 'a Data Communication Protocol for Building Automation and Control Network. 'It can enable building automation devices and systems from different manufacturers to implement cooperation. BACnet/IP is BAC- net standard based on IP technology,and it uses IP network as its own LAN to construct large-scale BACnet net- work. In the BACnet/IP infrastructure,there is UDP,but isn't TCP or the definition of a new IP packet type,on IP layer. The reason of choosing UDP is associated with the character limitations of the IP network,BACnet standard, TCP and the definition of a new IP packet type. Under the analyse,this paper illuminates that BACnet/IP technology can implement BACnet network over IP network effectively only when UDP is used.