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Recent technological advancements in the field of nanotechnology have increased the computation power of the wireless nodes while adhering to the energy constraints. This has made the use of the Wireless Sensor Networks (WSNs), more widespread, used in applications such as area monitoring, industrial monitoring, vehicle detection or military monitoring. Sensor nodes have made it possible to collect...
This In the Parallel itinerary based KNN query processing we have routing phase, KNN boundary estimation and spatial irregularity which uses the routing protocol called Greedy Perimeter Stateless Routing (GPSR). This GPSR offers routing support for Wireless Sensor Network (WSN). However GPSR was designed for the symmetric links (bidirectional reachable), but sensor networks are often asymmetric in...
Low-latency data delivery is an important requirement for achieving effective monitoring through wireless sensor networks. When sensor nodes employ duty cycling, sending a message along the shortest path, however, does not necessarily result in minimum delay. In this paper, we first study the lowest latency path problem, i.e., the characteristics of a path with minimum delay that connects a source...
Inexpensive sensors capable of significant computation and wireless communication with limited energy resources are available. Once deployed, the small sensor nodes are usually inaccessible to the user, and thus replacement of the energy source is not feasible. Hence, energy efficiency is a key design issue that needs to be enhanced in order to improve the life span of network. Several network layer...
Providing an efficient communication for the underwater wireless sensor networks is a significant problem due to the unique characteristics of such environments. Radio signal cannot propagate well in deep water, and we have to replace this with the acoustic channel. This replacement results in many issues like high latency due to less propagation speeds, low bandwidths and high error probability....
ZigBee is a standard that is suitable for wireless sensor networks. In ZigBee, sensor nodes can be connected by a tree topology called distributed address assignment mechanism (DAAM). It has the merits as follows: 1) it is easy to implement; 2) it simplifies the task of routing. It restricts the number of children and the depth of the network by setting a topological parameter set, which is defined...
Although commonly used sensor nodes are resource-limited devices, enabling cooperation among these devices can help building very powerful systems. Besides other characteristics, storage capabilities of individual sensor nodes have to be considered as this might be very small compared to the collected sensor data. The temporal availability of sink nodes or the importance of collected data are not...
A primary criterion of designing wireless sensor networks is energy efficiency. Focused on the energy problem of routing protocol in wireless sensor networks, we must mention to the clustering routing protocol. LEACH is one of the first clustering routing algorithms for sensor networks, and it is able to increase the network lifetime. However, it selects a cluster head based on random probability...
Presently available schemes for data centric storage in sensor networks usually use geographical routing protocols to communicate data between sensor nodes. However, sensor nodes are required to know their locations for them to use geographical routing protocols. In this paper, we propose a new routing protocol that does not rely on location information, and thus can be used for data centric storage...
A wireless sensor network consists of a large number of sensor nodes that are randomly deployed. This network is formed to perform the critical mission. The essential elements for the wireless sensor network are a source and sink. Source senses stimulus initiating a critical mission and transmits collected data to a sink. In the wireless network, the environment where a single sink and a large number...
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