基于双树结构的无线HART调度策略  

Double-tree structure based scheduling strategy for wireless HART

作　　者：董利达[1,2] 黄聪[2] 管林波[2] 

机构地区：[1]杭州师范大学杭州国际服务工程学院,浙江杭州311121 [2]浙江大学信息与电子工程学系,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2014年第3期391-397,共7页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学资金资助项目(61071062);浙江省自然科学资金资助项目(Y12F02030)

摘　　要：为了解决全局网络调度过程中的网络通信资源调度和维护复杂性的问题,根据无线可寻址远程传感器高速通道(HART)数据流特点,将原始网络拓扑结构简化表达为双树结构,基于此提出一种适用于规模已知而且最大深度确定的无线HART网络的调度策略.其核心思想是当网络拓扑发生变化时,根据双树结构搜索拓扑变化区域,仅针对该变化区域进行调度,而不影响双树结构中其他未发生变化的区域.测试和分析表明:该策略不仅能够有效地进行动态局部区域调度,而且能够保证网络通信的可靠性、流畅性以及网络数据的较小延时.To resolve the problem of the complexity of the scheduling and maintenance of communication resources during global network scheduling,according to the characteristics of wireless highway addressable remote transducer（HART）data stream,a double-tree structure was used to simplify the original network topology.On this basis,a communication resources scheduling strategy for the wireless HART network with determined size and inmost depth was proposed.The basic idea is that when the network topology changes,the changed region of topology will be searched along with its double-tree structure, which will be reallocated for communication resources,and other unchanged region of topology will not be affected.Experimental and analytical results show that the strategy not only is effective to dynamically schedule but also ensure the high reliability,fluency and small delay of data.

关 键 词：无线传感器网络 无线HART 调度策略 双树 

分 类 号：TN92[电子电信—通信与信息系统]