| 摘要: |
| 事件驱动的无线传感器网络中,数据传输呈现典型的漏斗效应,对事件可靠性带来负面影响.利用事件传输模型所固有的报文冗余特性,提出一种根据报文的到达次序,为同一事件的多份报文设定不同优先级并进行区分调度的传感网发送队列管理机制,详细介绍了其队列模型、报文优先级划分策略以及转发事件表维护算法.实验结果表明,该队列管理机制可有效提高事件检测率和准确率,并显著降低事件延迟. |
| 关键词: 无线传感器网络 事件传输模型 漏斗效应 优先级队列 事件可靠性 |
| DOI： |
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| 基金项目:国家自然科学基金(61272532); 计算机网络和信息集成教育部重点实验室开放基金(K93-9-2010-26) |
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| Differentiated Priority Queue Management in Event-Driven Wireless Sensor Networks |
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YANG Qi1, DONG Yong-Qiang1,2
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1.School of Computer Science and Engineering, Southeast University, Nanjing 211189, China;2.Key Laboratory of Computer Network and Information Integration of Ministry of Education (Southeast University), Nanjing 211189, China
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| Abstract: |
| In event-driven wireless sensor networks, many redundant packets flow from monitored sites through the network and to the sink, resulting in a typical funnel effect which affects event reliability, negatively. Taking this transport property into account, a differentiated priority queue management scheme is presented, in which the packets with same event identification are prioritized according to their arrival sequence, and scheduled differentially. The queue model, packet prioritization strategy and event table maintaining methods are examined in detail. Simulation results show that the queue management scheme can improve event reliability of event-driven sensor networks in terms of event detection ratio, accuracy ratio, and event delay efficiently. |
| Key words: wireless sensor network event-driven transport model funnel effect priority queue event reliability |
