LoRaWAN is a low-power wireless technology that provides long-range connectivity to battery-powered Internet of things (IoT) devices. To minimize the energy consumption IoT nodes, networks use for uplink pure non-slotted ALOHA multiple access scheme. Since devices are not synchronized in time, collisions between packets main source errors when number nodes becomes important. improve reliability...

State estimation is one of the main challenges in microgrids, due to complexity system dynamics and limitations communication network. In this regard, a novel real-time event-based optimal state estimator introduced article, which uses proposed adaptive send-on-delta (SoD) nonuniform sampling method over wireless sensors networks. The requires low bandwidth incurs lower computational resource c...

An efficient cluster head selection algorithm in wireless sensor networks is proposed in this paper. The implementation of the proposed algorithm can improve energy which allows the structured representation of a network topology. According to the residual energy, number of the neighbors, and the centrality of each node, the algorithm uses Fuzzy Inference Systems to select cluster head. The alg...

the monitoring of epileptic seizures is mainly done by means of eeg (electroencephalogram) monitoring. although this method is accurate, it is not comfortable for the patient as the eeg-electrodes have to be attached to the scalp which hampers the patient’s movement. this makes long term home monitoring not feasible. in this paper the aim is to propose a seizure detection system based on accele...

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Simultaneous routing and resource allocation has been considered in wireless networks for its performance improvement. In this paper we propose a cross-layer optimization framework for worst-case queue length minimization in some type of FDMA based wireless networks, in which the the data routing and the power allocation problem are jointly optimized with Fuzzy distributed H∞ control strategy ....

Low-Power Wide-Area Network (LPWAN) is a new type of wireless technology that offers long range communication for devices in the Internet Things (IoT) and LoRaWAN one main technologies currently available to enable LPWAN environments. In architecture, Join Server key component responsible security tasks, such as authentication management. However, acts Single Point Failure (SPOF) since all encr...