AREP: An asymmetric link-based reverse routing protocol for underwater acoustic sensor networks
AREP: An asymmetric link-based reverse routing protocol for underwater acoustic sensor networks
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DOI：
10.1016/j.jnca.2017.01.009
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发表时间：
2017-08
期刊：
影响因子：
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通讯作者：
Guangjie Han;Li Liu;Na Bao;Jinfang Jiang;Wenbo Zhang;J. Rodrigues
中科院分区：
文献类型：
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作者：
Guangjie Han;Li Liu;Na Bao;Jinfang Jiang;Wenbo Zhang;J. Rodrigues
路由协议设计是水声传感器网络的基本要求之一。然而，传统的水下路由协议只关注水下环境的特殊性，而忽略了影响路由建立的水下节点的特征。在这项研究中，水下节点的定向波束宽度对通信链路的影响进行了充分的探讨。研究结果表明，在定向天线波束宽度固定的情况下，相邻节点的相对位置变化容易产生非对称链路。为了保证源节点和目的节点之间的双向数据通信，提出了一种基于非对称链路的反向路由（AREP）。在AREP中，每个节点维护一个邻居表，其中的项用于分析链路状态。路由路径是通过优先利用对称链路来建立的。当需要在路由路径中引入非对称链路时，为了便于反向路由搜索，将建立一条三跳约束的迂回路由。在AREP中，通过消除空节点来解决路由空问题。周期性地进行路由更新以动态地调整先前的路由路径以适应由节点移动性引起的网络拓扑的改变。仿真结果表明，AREP提高了网络的传输延迟，分组投递率，以及能量消耗方面的性能。
Routing protocol design is one of the fundamental requirements of Underwater Acoustic Sensor Networks (UASNs). However, traditional underwater routing protocols focus on the particularities of underwater environment, while ignoring the features of underwater nodes that influence route establishment. In this study, the impact of the directional beam width of underwater nodes on communication links was fully explored. The presented case studies indicate that for fixed beam width of directional antennas, the relative position change of two geographically adjacent nodes is prone to generate asymmetric links. To ensure bidirectional data communication between source nodes and destination nodes, an asymmetric link-based reverse routing (AREP) is proposed. In AREP, each node maintains a neighbor table in which items are used to analyze the link state. Routing paths are established by prioritizing the utilization of symmetric links. When an asymmetric link is required to be introduced into a routing path, a three-hop-constrained circuitous route will be established for ease of reverse routing search. The routing void problem is addressed in AREP through eliminating void nodes. A routing update is periodically conducted to dynamically adjust previous routing paths to the change of network topology caused by node mobility. Simulation results demonstrated that AREP improves network performance in terms of transmission delay, packet delivery ratio, as well as energy consumption.