作　　者： ; ; ;

机构地区： 广东工业大学

出　　处： 《计算机应用研究》 2014年第5期1539-1542,共4页

摘　　要： 针对物联网系统数据分发机制的缺陷,提出了一种新的自适应实时数据分发机制(ARTDDM)。它以发布/订阅模型为基础,采用两种机制相结合的方法,提供及时可靠的数据传输机制。首先利用语义感知通信机制减少计算和通信开销,使得订阅者在网速缓慢或网络不稳定时也能及时访问数据;其次在系统中加入了前馈—反馈控制,随着网络负载变化,系统能自适应动态调整传感器模型的精度,保证服务质量。仿真结果表明,ARTDDM不仅在数据传输效率和可靠性上有较大改善,而且对可变网络负载具有较强的适应性。 Based on the problems of the data distribution mechanism, this paper presented a novel adaptive real-time data dis- tribution mechanism （ARTDDM）, which was based on the publish and subscribe architecture. In particular, it focused on two mechanisms of ARTDDM that enable timely and reliable sensor data dissemination under highly unpredictable environments. First, it used the semantics-aware communication mechanism that not only reduced the computation and communication over- head, but also enabled the subscribers to access data in a timely and reliable manner when the network was slow or unstable. Further, it added proactive control and reactive control into the system. This integrated control loop provided quality-of-service guarantees by dynamically adjusting the accuracy of the sensor models. The experimental results show that ARTDDM achieved highly efficient and reliable sensor data dissemination as well as robustness against unpredictable workloads.

关 键 词： 信息物理融合系统 物联网 语义感知 数据分发 自适应控制

领　　域： [自动化与计算机技术] [自动化与计算机技术]