a-无线传感器网络覆盖方案

M. Lehsaini, H. Guyennet, M. Feham
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引用次数: 8

摘要

由于构成无线传感器网络的传感器具有约束能量,因此在保证兴趣区域全覆盖的同时延长系统寿命是一个非常具有挑战性的问题。在大多数应用中,系统生命周期被定义为直到最后一个传感器失效所经过的时间。但是,在一些关键的应用中,如入侵检测和监视应用中,不应使用这种评估方法,这些应用必须提高覆盖率。因此,为了成功实现为这些类型的应用部署wsn的目标,通常要求活动传感器的比率应高于某个值α -覆盖率。在本文中,我们提出了一种有效的α -覆盖方案,以最大化活传感器的比例,这是保证整个感兴趣区域覆盖所必需的。该方案是基于无线传感器网络中为延长系统寿命而提出的调度和播播方案的性能提升。仿真结果表明,与LEACH[1]和LEACH- c[2]相比,我们的方案大大延长了网络寿命。
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a-Coverage Scheme for Wireless Sensor Networks
The problem of prolonging system lifetime in wireless sensor networks (WSNs) while guaranteeing the entire coverage of the interest zone is very challenging mainly due to constraint-energy of sensors that composed these networks. In most applications, system lifetime is defined as the time elapsed until the last sensor dies. However, this evaluation should not be used in some critical applications such as intrusion detection and surveillance applications, where coverage ratio must be raised enough. Thus, to fulfill successfully the objective of deploying WSNs for these types of applications, it is often required that ratio of alive sensors should be higher than a certain value alpha-coverage. In this paper, we propose an efficient alpha-coverage scheme to maximize the ratio of alive sensors that is necessary to guarantee the entire coverage of the interest region. This scheme is based on substantial performance gains of scheduling and broad casting solutions proposed to prolong system lifetime in WSNs. Simulation results show that our scheme prolongs considerably network lifetime when compared with LEACH [1] and LEACH-C [2].
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