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RFID has become an enabling technology for IoT implementation. In dynamic RFID scenarios, such as smart shops or industrial surroundings, it is crucial to identify every good, with an applied RFID tag, before it leaves the interrogation area. Currently, commercial reader solutions adopt DFSA protocol as a simple MAC that manages the communication between a reader and multiple tags. To increase DFSA...
Incorporating 1) the ubiquitous data gathering ability of wireless sensor networks (WSNs) and 2) the powerful data storage and data processing capabilities of cloud computing (CC), Sensor-Cloud (SC) is attracting increasing attention from both academia and industry. In this paper, focusing on improving the quality of service (QoS) of SC for users to obtain sensory data from the cloud, we propose Trust-Assisted...
Over the past ten years, many solutions have been proposed to address the problem of access point selection in IEEE 802.11 Wi-Fi networks. The standard, which recommends that user devices select an access point based on received signal strength (RSS) has many shortcomings and leads to poor performance. Many of the solutions proposed lead to better performance under some circumstances and with a particular...
In this paper, we aim at the optimal use of the scarce energy collected by a node powered by human energy harvesting in order to improve the provided Quality of Service (QoS). To achieve this goal, we have developed a Power-QoS control scheme, called PEH-QoS. PEH-QoS is composed of three sub-modules that interact with each other in order to make optimal use of energy and get the best possible QoS...
Cross-layer design has been widely used in wireless sensor networks, especially to improve the network lifetime, as can be seen in the literature. In this paper, a cross-layer solution is combined to a transmission advertisement scheme to improve a slotted ALOHA-based wireless sensor network throughput and lifetime. This medium access method scheme has been chosen because it does not add protocol...
This paper proposes a probabilistic approach for planning a WLAN. A measurement technique was used to collect data from a real WLAN network. The data collected were power and quality of service (QoS) metrics like, delay, jitter, packet loss, throughput and PMOS. They were analyzed through deductive statistical method. Finally, to optimize the QoS parameters to find the best distance from the AP to...
The spread use of wireless sensor networks (WSNs) in a variety of fields, ranging from the military to environmental protection, has drawn the attention of researchers to this type of networks. Despite their use in interesting applications, such as healthcare and surveillance, many shortcomings derived from their small size and constrained batteries limit their use, calling for solutions to enhance...
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