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D2D communications facilitate proximal devices to directly communicate with each other, bypassing cellular base stations or access points, and bring many benefits such as improvement in both spectral efficiency and energy efficiency. Among existing D2D enabling techniques, the recently released WiFi Direct is one promising protocol that offers high data rate D2D communications in local areas. However,...
Prolonging the network lifetime, scalability and balancing are very important requirements when implementing a wireless sensor network (WSN). Clustering is a technique that has been widely applied for achieving these goals. However, there exists the energy hole problem which causes an unbalanced energy consumption in equally formed clusters. More specifically, nodes near the base station (BS) die...
In recent years, Because of rapid advancement of semiconductor fabrication technology, electronic devices have been becoming smaller, cheaper, and requiring less power for its operation every year. One of the fields, which have benefited by the technological advancement, is the field of WSNs. Recently, a lot of researched related WSNs have been conducted and people have been realizing its unlimited...
Indoor Wireless sensor networks require a highly dynamic, adaptive routing scheme to deal with the high rate of topology changes due to fading of indoor wireless channels. Besides that, energy consumption rate needs to be consistently distributed among sensor nodes and efficient utilization of battery power is essential. If only the link reliability metric is considered in the routing scheme, it may...
Because of sensor nodes have limited capabilities, especially the energy reserve and processing ability, routing protocols in wireless sensor networks are a crucial challenge. These routing protocols should be simple, energy-efficient, and robust to deal with a very large number of nodes. They should also be self-configurable to node failures and changes of the network topology dynamically. The most...
In this paper, we propose a distributed cluster-based (DCB) algorithm for a long-lived sensor network. DCB achieves good performance in terms of network lifetime by using a efficient energy saving mechanism, which can banlance the energy load to the proper nodes. Simulation results show that DCB outperformances HEED in terms of networks lifetime.
Expected growth in use and implementation of wireless sensor networks (WSNs) in different environments and for different applications creates new security challenges. In WSNs, a malicious node may initiate incorrect path information, change the contents of data packets, and even hijack one or more genuine network nodes. As the network reliability completely depends on individual nodespsila presence...
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