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The goal of this paper is to design and implement an efficient data dissemination algorithm for wireless sensor networks. The proposed approach requires nodes in a network to publish their characteristics to their neighboring nodes. Each node selects its parent node for data forwarding using a method similar to natural selection. Fitness score for selection is locally calculated considering several...
The 6LoWPAN layer was recently introduced as a means to enable the transmission of IPv6 datagrams over Low-power and Lossy Networks (LLNs). That layer provides schemes for fragmenting the network-layer datagrams and reassembling link-layer fragments. However, the loss of one fragment of the original datagram will lead to the loss of the latter, and eventually the retransmission of all the fragments,...
Though power allocation has been studied extensively in the literature, as energy efficiency becomes more important in “green” wireless communication, we revisit to study the differences in SNR vs BER-based power allocation (PA) for relay communication when the direct link is severely faded. The average SNR and average BER expressions are first derived for an amplify-and-forward relaying protocol...
In this paper, the problem of mobility handling in wireless sensor network (WSN) is studied with a simple priority backoff technique. To incorporate this technique for stationary and mobile sensor nodes, a novel hybrid MAC protocol called VMAC is designed with a fixed frame length. VMAC combines the advantages of schedule-based MAC for energy savings and contention-based MAC for short transmission...
Cooperative communication is an effective approach for increasing the spectral efficiency and/or the coverage of cellular networks as well as reducing the cost of network deployment. However, it remains to be seen how energy efficient it is. In this paper, we assess the energy efficiency of the conventional Amplifyand- forward (AF) scheme in an in-building relaying scenario. This scenario simplifies...
With the exponential growth of internet communications and the rise to prominence of environmental concerns, the energy consumption of the Information Communications Technology industry has become an issue of major importance. One area that has not been yet fully explored is the evaluation of the computational loads required in the processing and forwarding of traffic. While significant work has been...
This paper describes the application of Real-Time Physical Systems (RTPS) as a novel approach to model the physical process of Cyber-Physical Systems (CPS), with specific focus on Cyber-Physical Energy Systems (CPES). The proposed approach is based on the real-time scheduling theory which is nowadays developed to manage concurrent computing tasks on processing platforms. Therefore, the physical process...
Cooperative spectrum sensing, which can profoundly improve the ability of discovering the spectrum opportunities, is regarded as an enabling mechanism for Cognitive Radio Networks (CRNs). One of the most fundamental problems in cooperative spectrum sensing is how to assign Secondary Users (SUs) to sense different primary channels such that SUs can achieve a good balance between sensing accuracy and...
In wireless sensor networks, one of the key challenge is to achieve minimum energy consumption in order to maximize network lifetime. In fact, lifetime depends on many parameters: the topology of the sensor network, the data aggregation regime in the network, the channel access schemes, the routing protocols, and the energy model for transmission. In this paper, we tackle the routing challenge for...
The use of wireless sensor networks is essential for implementation of information and control technologies in precision agriculture. We present our design of network stack for such an application where sensor nodes periodically collect data from fixed locations in a field. Our design of the physical (PHY) layer consists of multiple power modes in both the receive and transmit operations for the purpose...
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