一种低开销无线HART路由策略

A Low Overhead Routing Strategy for WirelessHART

无线HART协议是一种新兴的适用于工业领域的高可靠性无线传感器协议规范。基于无线HART网络特点,提出一种低开销的路由策略,其基本思想是将全网Graph拓扑结构转化为双树拓扑结构,上行路由采用无线HART协议中提出的Graph路由方式,而下行路由采用多路径方式。此策略简化了Graph路由方式,降低网络管理器的Graph拓扑以及节点的路由存储开销,同时降低全网络的路由维护开销。测试表明,此策略在保证网络通信可靠性的基本条件下有效的降低了路由开销。

WirelessHART communication protocol is an emerging wireless sensor network communication protocol specification, which is applied to the industrial field because of its high reliability. According to the characteristics of wirelessHART data stream, a double-tree structure is used for original network topology. On the basis of it, the paper proposes a routing strategy for the wirelessHART network. The basic idea of the strategy is that the full-redundance routing method proposed in the WirelessHART specification is reserved for upstream routing, while the multi-path routing method is used for downstream routing. The strategy simplifies Graph routing, thus reducing the storage overhead of the network manager and device nodes, as well as routing maintenance overhead of whole network. Experimental results show that our algorithm is effective to reduce the routing overhead, while still keeping basic reliability of communication.