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Wireless Sensor Networks (WSNs) represent a very promising solution in the field of wireless technologies for industrial applications. However, for a credible deployment of WSNs in an industrial environment, four main properties need to be fulfilled, i.e., energy efficiency, scalability, reliability, and timeliness. In this paper, we focus on IEEE 802.15.4 WSNs and show that they can suffer from a...
In this paper, we consider a wireless sensor network in a single cell architecture, where a single hop between sensor nodes and central controller node exists. We propose a new medium access control (MAC) protocol and packet transmission scheme between sensor nodes with single antenna and central controller node with multiple antennas. Our scheme is an extension to previous work proposed by Coronel...
A Wireless sensor network (WSN) consists of a potentially large number of sensor nodes with wireless-communication capabilities that work collaboratively to achieve a common goal. While every WSN application has specific requirements, there are some common basic services that any WSN must offer in order to support applications. There are available commercial WSN nodes offering such basic services,...
This paper introduces an approach of media access control for reducing collisions in a heterogeneous wireless sensor network, which contains different types of sensor nodes so a sensor fusion technique can be barely applied. Data packets sent to a designated node can cause serious collision due to a funneling effect of network traffic. At lightly loaded networks, our approach uses traditional random...
Wireless sensor networks (WSNs) are often deployed in harsh environments with little human control, thereby necessitating self organizing and maintenance mechanisms for medium sharing and data routing. Moreover, since sensor nodes operate on energy-limited batteries, designing energy-efficient routing techniques that extend the network lifetime is of a paramount importance. In this paper, we propose...
We describe an improved version of simple polling protocol employed in a wireless sensor network proposed. Although this simple wireless sensor network works efficiently, it is very limited in computing capability. Simple polling protocol works well in situation where every sensor node shares heavy traffic. However, when a few sensor nodes contribute to the traffic, most of the time slots allocated...
In most of the MAC protocols, we only optimize sensor nodes that are within each other's communication range. In some cases this kind of optimization is the local optimization and may affect the other nodes in large scale sensor networks. Moreover, these protocols can't solve the hidden terminal problem drastically; some of them are highly rely on RTS/CTS to avoid it, but it is inefficient. In this...
Wireless sensor networking is an emerging technology that has a wide range of potential applications including environment monitoring. In this paper we present the important parameters which must be taken into account while designing MAC protocol for various wireless sensor nodes (Mica2, Mica2Dot & IMotes) based Sensor Networks.
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