Optimal p-Persistent MAC Algorithm for Event-Driven Wireless Sensor Networks

J. Vales-Alonso, E. Egea-López, M. Bueno-Delgado, J. L. Sieiro-Lomba, J. García-Haro
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引用次数: 5

Abstract

In event-driven wireless sensor networks nodes transmit information only if the monitored physical magnitude levels have triggered an alarm. In these networks, traffic exhibits a high spatial correlation, since it is likely that neighbor nodes detect and try to notify the same events. Thus, the probability of packet collision raises up, as well as notification delay, just as opposite as required. In this work we propose to use a p- persistent mechanism in the access control layer. The aim is reducing collisions and saving energy. We compute the optimal p for a coherent network deployment and describe the experimental implementation of our proposal. Theoretical computations predict a notable improvement, specially in terms of energy, and experiments reveal that our proposal achieves up to 67% of energy saving compared against a perfect (collision-free) mechanisms.
事件驱动无线传感器网络的最优p-Persistent MAC算法
在事件驱动的无线传感器网络中,只有当被监测的物理震级触发警报时,节点才传输信息。在这些网络中,流量表现出高度的空间相关性,因为邻居节点很可能检测并尝试通知相同的事件。因此,数据包冲突的概率会增加,通知延迟也会增加,这与需要的正好相反。在这项工作中,我们建议在访问控制层使用p- persistent机制。其目的是减少碰撞和节约能源。我们计算了相干网络部署的最优p,并描述了我们建议的实验实现。理论计算预测了显著的改进,特别是在能量方面,实验表明,与完美的(无碰撞)机制相比,我们的提议实现了高达67%的节能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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