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In a smart grid environment, wireless sensor networks (WSNs) perform a significant role in supervising and taking control decisions based on the data transferred from source to destination. The work in this paper is aimed to develop a cross-layer multi-channel MAC (CMCMAC) protocol for interference mitigation between ZigBee and WiFi operating in common 2.4GHz frequency band. In this protocol, to avoid...
Energy consumption is an important consideration in sensor networks for sensing, computation, and communication. For any sensor network, either ad hoc or distributed, controlled or self-organized, energy management is crucial since the lifetime of a sensor node depends exclusively on its limited battery capacity (except for physical damage and system failures), hence, it is extremely important to...
WSNs hold the promise of many new applications that require the network to handle traffic with different priority levels and QoS requirement in an energy efficient way while avoiding collisions and interference. In this paper, we investigate several aspects related to the application requirements and the network states and resources in order to provide multi-QoS routing protocol for WSNs. We propose...
The priority scheduling algorithm briefly describes inter-node data transmission of the body area networks which based on L-MAC protocol in wireless sensor networks, and it proposes to transfer emergent data prior by using a scheduling algorithm which based on dealing with emergent data prior and sending emergent data prior. Applying this method can improve the rate of emergent data transmission and...
This paper presents a new data transmission protocol in Delay Tolerant Mobile Wireless Sensor Networks, which divides the data transmission process into two phases: data reception phase and data forwarding phase, mainly fulfilling through analyzing the state of mobile nodes and using Hand up mechanism. Simulation result shows that, through the implementation of two phases, we can obtain a higher message...
In Wireless Sensors and Actuators Networks (WSANs), actuator nodes are nodes richer in resources (processing capacity, power transmission and energy storage) and better suited than sensor nodes to process the data, make decisions based on sensed values and perform appropriate actions. In addition, in order to provide timely action, coordination between sensors and actuators is necessary. Thus, in...
In this paper, we are interested in minimizing the delay and maximizing the lifetime of event-driven wireless sensor networks for which events occur infrequently. In such systems, most of the energy is consumed when the radios are on, waiting for a packet to arrive. Sleep-wake scheduling is an effective mechanism to prolong the lifetime of these energy-constrained wireless sensor networks. However,...
In this paper, a novel routing technology based on circle and wedge trained for wireless sensor networks is proposed to extend network lifetime and to reduce transmission delay. The routing protocol based on hierarchical architecture called CWR protocol need not the routing table, which saves lots of energy and cache of the sensor, also reduces the delay of looking for routing information. To solve...
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