SDN-Based Application Framework for Wireless Sensor and Actor Networks
SDN-Based Application Framework for Wireless Sensor and Actor Networks
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基于 SDN 的无线传感器和参与者网络应用框架
DOI：
10.1109/access.2016.2547890
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发表时间：
2016-03
期刊：
影响因子：
3.9
通讯作者：
Li Wenxiang
中科院分区：
文献类型：
--
作者：
Zhou Jianguo;Jiang Hao;Wu Jing;Wu Lihua;Zhu Chunsheng;Li Wenxiang
无线传感器与执行节点网络（WSAN）是一个由多个传感器节点和执行节点组成的可协同处理复杂任务的网络，是实现各种应用的理想平台。然而，节点的移动性、容量的异构性、拓扑结构和能耗等问题给WSAN的高效运行带来了严峻的挑战。目前，软件定义网络（SDN）作为一种新的方法出现，是有效的管理和优化网络在一个可编程的和集中的模式。本文研究了SDN方法在WSAN中的应用框架和相关方法，旨在提高网络的效率和可扩展性。该框架的细节包括三层结构、相关系统实体、增强的协议栈以及用于WSAN节点间协作通信和任务执行的可编程消息类型。在此基础上，从移动性、节能、可靠性维护和拓扑结构构建等多个方面探讨了有效的系统管理所面临的挑战和机制。本文还提出了一种将分解后的任务调度到相关节点的优化方法，并用遗传算法实现了一个实例。接下来，本文展示了典型的应用场景，包括军事，工业，交通和环境灾害监测。最后，通过室内和室外两个应用场景，说明了SDN辅助通信切换的应用。最后，讨论了SDN在WSAN中的未来发展趋势和技术挑战。
As a promising platform for implementing various applications, a wireless sensor and actor network (WSAN) consists of many sensor and actor nodes that can cooperatively handle complex tasks. However, many issues, including nodes' mobility, the heterogeneity of capacity, topology, and energy consumption, may bring severe challenges to efficient WSAN operation. Currently, the software defined network (SDN) appears as a novel approach that is effective to manage and optimize networks in a programmable and centralized pattern. This paper studies the application framework and relevant methods for applying the SDN approach in a WSAN, with the objective of improving network's efficiency and scalability. The details of the framework include a three-layer structure, the relevant system entities, the enhanced protocol stack, and the programmable message types for cooperative communication and task execution among WSAN nodes. Based on this framework, this paper explores the relevant challenges and mechanisms for effective system management from many aspects, including mobility, energy saving, reliability maintenance, and topology construction. This paper also proposes an optimization method for scheduling decomposed tasks to relevant nodes, with an example implemented by the genetic algorithm. Next, this paper demonstrates the typical application scenarios, including military, industry, transportation, and environmental disaster monitoring. Moreover, an indoor application scenario and an outdoor application scenario are presented to demonstrate the application of the SDN-assisted communication handoff. Finally, the future trends and technical challenges for SDN in WSAN are discussed.
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作者：
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DOI：
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