Coverage overlapping problems in applications of IEEE 802.15.4 wireless sensor networks
Coverage overlapping problems in applications of IEEE 802.15.4 wireless sensor networks
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DOI：
10.1109/wcnc.2013.6555280
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
Chao Ma;Jianhua He;Hsiao-Hwa Chen;Zuoyin Tang
中科院分区：
文献类型：
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作者：
Chao Ma;Jianhua He;Hsiao-Hwa Chen;Zuoyin Tang
IEEE 802.15.4标准是为低功耗、低数据速率的无线传感器网络而设计的一种相对较新的标准，在环境监测、电子健康、家庭和工业自动化等领域有着广泛的应用。本文研究了IEEE 802.15.4无线传感器网络覆盖范围内的隐藏设备问题，当多个802.15.4无线传感器网络紧密和独立部署时，可能会出现隐藏设备的问题。我们考虑了两个802.15.4无线传感器网络部分覆盖重叠的典型场景，并提出了一个基于马尔可夫链的分析模型来揭示由于覆盖重叠而导致的隐藏设备的性能下降。模拟了隐藏设备和网络休眠模式对饱和吞吐量和能耗的影响。通过仿真对分析模型进行了验证，为多个802.15.4无线传感器网络紧密部署时的网络设计和规划提供了依据。
IEEE 802.15.4 standard is a relatively new standard designed for low power low data rate wireless sensor networks (WSN), which has a wide range of applications, e.g., environment monitoring, e-health, home and industry automation. In this paper, we investigate the problems of hidden devices in coverage overlapped IEEE 802.15.4 WSNs, which is likely to arise when multiple 802.15.4 WSNs are deployed closely and independently. We consider a typical scenario of two 802.15.4 WSNs with partial coverage overlapping and propose a Markov-chain based analytical model to reveal the performance degradation due to the hidden devices from the coverage overlapping. Impacts of the hidden devices and network sleeping modes on saturated throughput and energy consumption are modeled. The analytic model is verified by simulations, which can provide the insights to network design and planning when multiple 802.15.4 WSNs are deployed closely.