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In Wireless Sensor Network (WSN), sensor nodes are densely deployed over the region to monitor the environmental conditions like Temperature, Pressure, Sound, Vibration and Light. These networks are widely used in various fields such as medical, industrial monitoring, building and home automation or military surveillance. Sensor nodes in WSN continuously transfer the sensed information to Base Station...
The Wireless Sensor Networks (WSNs) are composed of small sensor nodes capable of sensing (collecting), processing and transmitting data related to some phenomenon in the environment. However, the sensor nodes have severe constraints, such as: low network bandwidth, short wireless communication range, and limited CPU processing capacity, memory storage and power supply. Therefore, maximizing the benefits...
Sensor deployment is one of the key topics addressed in Wireless Sensor Network (WSN). This paper proposes a new deployment technique of sensor nodes for WSN called as Quasi Random Deployment (QRD). The novel approach to deploy sensor nodes in QRD fashion is to improve the energy efficiency of the WSN in order to increase the network life time and coverage. The QRD produces highly uniform coordinates...
Data gathering is one of the most popular energy-efficient routing protocols in Wireless Sensor Networks (WSNs). In this research, we introduce a Dynamic Balanced Spanning Tree (DBST) for data aggregation in WSNs which considers several criteria to balance the energy consumption between sensor nodes. A cost function is presented which can follow the conditions of network. It considers various factors...
Inter-cluster communication technique is drawing immense research interest in recent wireless sensor network (WSN) applications. Since sensor nodes are very much constrained in power supply, extending lifetime of these sensors is essential. On the other hand, it is difficult to provide reliable data transfer in WSNs because of their unreliable link quality and congestion at a cluster head (CH) node...
PEGASIS, a chain-based protocol, forms chains from sensor nodes so that each node transmits and receives from a neighbor. In this way, only one node (known as a HEAD) is selected from that chain to transmit to the sink. Although PEGASIS is able to balance the workload among all of the nodes by selecting the HEAD node in turn, a considerable amount of energy may be wasted when nodes which are far away...
The most important element of Wireless Sensor Networks technologies is energy efficiency. When we design network protocols for Wireless Sensor Networks, we should consider duplicate messages. We can achieve the goal of energy efficiency as reducing duplicate packets. Directed Diffusion is one of the energy efficient routing protocols. It selects one reinforced path from source to destination and then...
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