Throughput and Network Lifetime Maximization in Dual-Radio Sensor Networks Integrated Into the Internet of Things

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Wireless sensor networks (WSNs) constitute a main component of Internet of Things (IoT) that is emerging as an attractive paradigm. In this paper, we propose a novel dual-radio architecture by adding a high-bandwidth radio on every sensor node. In WSNs, each sensor is equipped with two radio interfaces: the low-power IEEE 802.15.4 radio used on all sensors to transmit data within the network and the high-bandwidth 3G /LTE radio activated only on a subset of sensors, referred to as gateways, for sending data to the IoT. given the traffic demand for each sensor nodes, the number of gateways to deploy and the interference model, we propose a novel deployment method for placing optimal number of gateways in the WSNs where sensor nodes can join the IoT through the network’s gateway, such that the lifetime and total throughput that can be supported is maximized while it also ensure a fairness among all sensor nodes. Due to the NP-hardness of the problem, we then propose a novel heuristic by decomposing the problem into two sub-problems and solving them separately. From our extensive simulation conducted, using ns-2, we identified that our model improves network performance, including the network lifetime prolongation, throughput maximization, network scalability improvement, the average data delivery delay reduction and lead a high traffic load to meet the diverse application needs of WSNs.
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Wireless Sensor Networks; Internet of Things; Throughput Optimization; 3G; Gateway; IEEE 802.15.4

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