摘要
数据链路层将来自网络层的数据可靠地传输到目的节点的网络层,从而实现安全、可靠的网络通信,以降低节点能耗为目标提出一种无线HART数据链路层的设计方法。采用符合工业现场环境的层状拓扑结构,利用时分多址媒介接入技术和跳频技术,在实现全网时钟同步的基础上,以绝对时隙和地址类型为核心实现数据链路层的通信调度,以状态机位模型实现节点的状态转换。实验结果表明该方法能够达到30μs的时钟同步精度,降低了节点能耗,满足工业现场要求。
The data link layer transports the network layer＇s data from the source to the destination node to form a safe reliable communication network. The paper designed and implemented the wireless Hart data link layer from the point of reducing energy consumption. It takes TDMA media access, channel-hoping technology and a layer topology achieving the node state machine and communication scheduling based on the ASN and address, in the realization of the all-network time synchronization. An adapter node＇s network had been form, and the data of experiment show that the method has a high accuracy of 30 microseconds of time synchronization and low energy consumption,it meets the industrial field reauirements.
出处
《电子设计工程》
2010年第6期68-70,75,共4页
Electronic Design Engineering
