期刊名称：International Journal of Computer Information Systems and Industrial Management Applications
印刷版ISSN：2150-7988
电子版ISSN：2150-7988
出版年度：2012
卷号：4
页码：522-529
出版社：Machine Intelligence Research Labs (MIR Labs)
摘要：Wireless sensor networks (WSNs) have wide variety of applications and provide limitless future potentials. Nodes in WSNs are prone to be failure due to energy depletion, hardware failure, communication link errors, malicious attack, and so on. Therefore, fault tolerance is one of the critical issues in WSNs. Directed diffusion is a classic data-centric routing protocol in Wireless Sensor Networks (WSNs). However, the communication cost and energy balance over the whole WSNs have not been paid enough attention. Hybrid PUSH-PULL data Diffusion (LOHD) is a data dissemination algorithm for data-centric sensor networks. LOHD works well in a wide range of networks and source/sink settings. It adaptively selects an ultra-node through a well- controlled flooding and the ultra-node maintains the gradients from sources to sinks. In this paper we intend to improve energy consumption and data delivery ratio. In former we use the hybrid Push-Pull and in the latter we use the fault tolerant mechanisms. The most commonly used technique for fault recovery is replication or redundancy of components that are prone to be failure. In this paper we improve the LOHD with considering energy parameter in order to extend the lifetime of the sensor network, and we introduce fault tolerant method in order to increase the reliability and data delivery ratio. Simulation results show that our proposed protocols are outperforms directed diffusion in energy efficiency, energy balance over WSNs, and delivery ratio.
关键词：Wireless Sensor Networks; Fault tolerant; ; Directed diffusion; Energy efficient
