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Since our research to study mobility, we noted that the best way to represent the mobility of sensor nodes is to follow a mobility model. Numerous models have been proposed in the literature, they are commonly used as a data source in all kinds of studies, including motion in several networks. To this end, we propose to exploit this mobility, which results in the proposal of a new approach based on...
In the latest communication system protocols, the Error Vector Magnitude (EVM) become the most significant measurement for evaluating power amplifier performance. It determines the modulator performance and how much error free signal is modulated, represented by the transmit signal phase and amplitude [1]. The main focus of this work is to design a transmission chain for Wireless Sensor Network (WSN)...
Cell phones and all radio transmitters become unavoidable in our daily life. Several debates held on the effects of the waves emitted by these equipment on human health especially that emitted by base stations. Therefore several studies have estimated the electric field emitted by stations in order to analyze the specific absorption rate on the human body of these waves. But the problematic is that...
Rescue tasks in coal mines are fundamental but often suppose the loss of rescuers lives, as currently they are carried out only by humans. TeleRescuer project expects to make this activity safer by developing a robot to be driven by rescuers from a safe area. It offers virtual teleportation providing to the operator an environment where he can interact with the reality perceived by the robot. In this...
Color and texture have been proven to be very discriminant attributes in image analysis across many works. This paper proposes a color texture analysis method based on the graph theory, in which we convert the texture in question into an undirected weighted graph and explore the shortest paths between four pairs of pixels according to different scales and orientations of the image. Basically, we extend...
The sector of telecommunications is undergoing a rapid change due to the diversity of technologies, competition between different operators, and the increasing request of services of video on demand (VoD). In this regard, the Next Generation Network (NGN) proves to be the tendency of several operators. Thus, each operator is forced to make his network more efficient to ensure the loyalty of his customers...
Virtual laboratories are fully interactive simulations in which students conduct experiments, collect data and answer questions to assess their understanding. The primary objective of virtual cloud-based lab solutions is to provide customized IT environments for users. In today's information, networks and security training, time and location are one of the crucial elements for participants. Many universities...
The increasing data demand of mobile users in the rural environment makes the provision of the Internet access quite challenging. Specialized relay stations can help to enhance the network coverage, but in geographically difficult terrains with users being widely scattered, their usage becomes economically and operationally difficult. In this paper, we propose to utilize the ordinary mobile users...
In the near future some of mobile communication prime objectives need to be improved, including increased capacity, higher data rate, low latency, and better quality of service. To respond to these growing demands, a modification should be done at the physical layer in terms of waveforms adopted. Flexible waveforms have been proposed to meet the challenges faced in current generation systems such...
Several wireless and mobile access technologies such as LTE, 3G, 802.11, WiMaX, etc, are omnipresent in the mobile terminal environment and offer different flows (e.g. data, voice and video). This heterogeneous environment requires the integration of different technologies in order to exploit their complementary characteristics and provide the mobile terminal with the best connectivity anywhere and...
Many researches and standardization work on the challenges that 5th networks generation raised from the radio perspective while employing advanced techniques such as massive MIMO (Multiple-Input-Multiple-Output) and CoMP (Cooperative Multi-points Processes). However the backhaul problems such as bottlenecks has emerged due to the deployment of ultradense and heavy traffic that should be connected...
In this article, we investigate energy efficient power control for the uplink of an OFDMA single-cell communication system. The user equipments decide freely their power level on the available subcarriers of the system in order to maximize their EE (Energy Efficiency) while respecting minimum normalized rate requirements. We use the non-cooperative Game theory to demonstrate that users will end by...
A non-orthogonal multicarrier signal, termed spectrally efficient frequency division multiplexing (SEFDM), is investigated in this work. It improves spectral efficiency by compressing sub-carrier spacing below the symbol rate at the cost of self-created inter carrier interference (ICI). Sphere decoding (SD) is an efficient method to recover signals approaching maximum likelihood (ML) performance....
In order to keep up with countless emerging applications requirements, cellular systems have to embed new flexible aspects, with the aim of satisfying future wireless environments expectations. In this context, we consider a cellular system based a full-duplex amplify-and-forward cooperative communication over Nakagami-m channel. We assume the direct link between the source and the destination is...
Recently an extensive deployment of small cell Networks (SCNs) called two tier-heterogeneous networks have been proposed, especially for dense urban zone. Therefore, Macro Cell Networks containing a hyper density of SCNs distributed randomly within it will emerge the field. The benefits of two tier Heterogeneous Networks (HetNets) are realized through the traffic flooding via small cells. To enhance...
Text spotting, i.e., the localization and recognition of text occurrences in natural images and videos, is a challenging problem in computer vision. Important applications of text spotting are: video indexing, retrieval and search, the support of blind persons in finding their way in unknown environments and reading street and shop signs for autonomously driving vehicles or car license plate recognition...
Once a company is located on several sites, the communication between these sites would be critical for its activity, regardless of its size. VPN technology allows the connection between these different sites, while giving the user the benefit of the security. New Generation VPN technologies allow to create multiple virtual tunnels between various devices in a fast, automatic and dynamic manner. However,...
This paper presents a secure protocol for authenticating Electronic Control Units (ECUs) in the Controller Area Network (CAN) bus and establishing session keys between them. These keys are used to introduce message source authentication for the CAN network. Our method is based on the elliptic curve cryptography (ECC) which is more suitable for embedded systems where computational power and memory...
In this paper, we investigate the combinatorial design of a new class of One-Step Majority-Logic Decodable (OSMLD) codes, based on Balanced Incomplete Block Designs of type Oval, which are derived from finite geometry. We show that the constructed OSMLD codes provides high rates in addition to good correction capacities. Simulation results shows that the proposed codes converge well under iterative...
Collaboration between organization changes dynamically and spreads rapidly through a Collaborative Network (CN). Developing methods for handling such networks of collaboration on a real scale requires modeling social interactions between different actors in order to share, analyze, and suggest improvements for a collaboration perspective. This paper describes a new tool for collaboration modeling...
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