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Adaptive Medium Access Control for Distributed Processing in Wireless Sensor Networks

机译:无线传感器网络中分布式处理的自适应媒体访问控制

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Signal and information processing tasks over Wireless Sensor Networks can he successfully accomplished by means of a distributed implementation among the nodes. Existing distributed schemes are commonly based on iterative strategies that imply a huge demand of one-hop transmissions, which must be efficiently processed by the lower layers of the nodes. At the link layer, general purpose medium access (MAC) policies for wireless communications usually focus on avoiding collisions. These existing approaches result in a reduction of the number of simultaneous transmissions, and an underutilization of the channel as a consequence. This leads to a decrease in the performance of the distributed tasks, since an efficient channel occupation is not generally accomplished. In this paper, we propose a new MAC protocol that, besides focusing on the reliability of the communications, provides an efficient channel occupation. While the former has a direct impact on the energy consumption of usually battery powered devices, the latter affects the performance of the distributed task executed. We include both aspects in a global utility function that the nodes, relying just on local available information, aim to increase at every communication step. Furthermore, our proposal combines in a unique framework both unicast and broadcast scenarios. Through several simulation results, we show that our adaptive protocol outperforms the related literature.
机译:通过在节点之间进行分布式实现,可以成功完成无线传感器网络上的信号和信息处理任务。现有的分布式方案通常基于迭代策略,这意味着对单跳传输的巨大需求,必须由节点的较低层有效地对其进行处理。在链路层,用于无线通信的通用媒体访问(MAC)策略通常集中在避免冲突上。这些现有方法导致同时传输的数量减少,结果是信道的利用率不足。由于通常无法实现有效的信道占用,因此这导致分布式任务的性能下降。在本文中,我们提出了一种新的MAC协议,除了关注通信的可靠性外,它还提供了有效的信道占用。前者对通常由电池供电的设备的能耗有直接影响,而后者则影响执行的分布式任务的性能。我们将这两个方面都包含在全局效用函数中,节点仅依赖于本地可用信息,旨在在每个通信步骤中增加节点。此外,我们的建议在一个独特的框架中结合了单播和广播方案。通过几个仿真结果,我们表明我们的自适应协议优于相关文献。

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