Delay aware reliable transport in wireless sensor networks
Delay aware reliable transport in wireless sensor networks
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DOI：
10.1002/dac.869
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发表时间：
2007-10-01
影响因子：
2.1
通讯作者：
Akan, Oezguer B.
中科院分区：
文献类型：
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作者：
Gungor, Vehbi C.;Akan, Oezguer B.
无线传感器网络 (WSN) 是基于事件的系统，依赖于多个传感器节点的集体努力。接收器处的可靠事件检测基于传感器节点提供的集体信息，而不是任何单独的传感器数据。因此，传统的端到端可靠性定义和解决方案在WSN体系中不适用，只会导致稀缺传感器资源的浪费。此外，无线传感器网络的可靠性目标必须在应用程序造成的一定实时延迟范围内实现。因此，WSN 范式需要集体延迟约束的事件到接收器可靠性概念，而不是传统的端到端可靠性方法。据我们所知，还没有一种传输协议解决方案能够同时满足无线传感器网络的可靠性和实时延迟限制要求。本文提出了针对无线传感器网络的延迟感知可靠传输（DART）协议。 DART 协议的目标是以最小的能耗及时、可靠地将事件特征从传感器场传输到接收器。在这方面，DART 协议同时解决了 WSN 中的拥塞控制和及时事件传输可靠性目标。除了高效的拥塞检测和控制算法之外，它还结合了时间关键事件优先（TCEF）调度机制，以满足汇聚节点的特定于应用程序的延迟界限。重要的是，DART协议的算法主要运行在资源丰富的接收节点上，在资源有限的传感器节点上所需的功能最少。此外，DART 协议可以适应无线传感器领域中多个并发事件的发生。通过仿真实验进行的性能评估表明，DART协议在WSN的实时通信要求、可靠的事件检测和能耗方面均达到了较高的性能。版权所有 (c) 2007 John Wiley & Sons, Ltd.
Wireless sensor networks (WSN) are event-based systems that rely on the collective effort of several sensor nodes. Reliable event detection at the sink is based on collective information provided by the sensor nodes and not on any individual sensor data. Hence, conventional end-to-end reliability definitions and solutions are inapplicable in the WSN regime and would only lead to a waste of scarce sensor resources. Moreover, the reliability objective of WSN must be achieved within a certain real-time delay bound posed by the application. Therefore, the WSN paradigm necessitates a collective delay-constrained event-to-sink reliability notion rather than the traditional end-to-end reliability approaches. To the best of our knowledge, there is no transport protocol solution which addresses both reliability and real-time delay bound requirements of WSN simultaneously.In this paper, the delay aware reliable transport (DART) protocol is presented for WSN. The objective of the DART protocol is to timely and reliably transport event features from the sensor field to the sink with minimum energy consumption. In this regard, the DART protocol simultaneously addresses congestion control and timely event transport reliability objectives in WSN. In addition to its efficient congestion detection and control algorithms, it incorporates the time critical event first (TCEF) scheduling mechanism to meet the application-specific delay bounds at the sink node. Importantly, the algorithms of the DART protocol mainly run on resource rich sink node, with minimal functionality required at resource constrained sensor nodes. Furthermore, the DART protocol can accommodate multiple concurrent event occurrences in a wireless sensor field. Performance evaluation via simulation experiments show that the DART protocol achieves high performance in terms of real-time communication requirements, reliable event detection and energy consumption in WSN. Copyright (c) 2007 John Wiley & Sons, Ltd.