With the exploration of the ocean, underwater acoustic communication has attracted more and more attention in recent years. The underwater acoustic channel is considered to be one of the most complicated channels because it suffers from more serious multipath effect, fewer available bandwidths and quite complex noise. Since the signals experience a serious distortion after being transmitted…
Omnet++ Simulator
Minimizing the Communication Cost of Aggregation in Publish/Subscribe Systems
Modern applications for distributed publish/subscribe systems often require stream aggregation capabilities along with rich data filtering. When compared to other distributed systems, aggregation in pub/sub differentiates itself as a complex problem which involves dynamic dissemination paths that are difficult to predict and optimize for a priori, temporal fluctuations in publication rates, and the mixed presence…
Enabling resilient smart grid communication over the information-centric C-DAX middleware
Limited scalability, reliability, and security of todays utility communication infrastructures are main obstacles to the deployment of smart grid applications. The C-DAX project aims at providing and investigating a communication middleware for smart grids to address these problems, applying the information-centric networking and publish/subscribe paradigm. We briefly describe the C-DAX architecture, and extend it with a flexible resilience concept,…
The relationship between cultural dimensions and the quality of communication in education
Culture is the collective programming of the mind distinguishing members of one group or category of people from others [1]. Each culture is different. Therefore, there are five dimensions of culture and this article explains and explores one of these: Power Distance (PD). This paper will outline the impact of these dimensions in educational institutions.…
State Observation and Communication for Cloud Vehicle Control
In this study, a new method was developed to automate vehicles. Numerous vehicle control systems have been realized for electronic steering, driving, and braking. Higher-standard vehicle control systems have increased costs. This study focused on cloud vehicle control using roadside sensors and computers. If a high-standard vehicle control system can be realized by using vehicles…
PHY-Layer Resiliency in OFDM Communications: A Tutorial
This tutorial paper addresses the physical layer security concerns and resiliency of Orthogonal Frequency Division Multiplexing (OFDM) communications; the de facto air-interface of most modern wireless broadband standards including 3GPP Long Term Evolution (LTE) and WiMAX. The paper starts with a brief introduction to the OFDM waveform and then reviews the robustness of the existing OFDM…
Modulation rate study in spin torque oscillator based wireless communication system
Wireless transmission requires a circuitry to generate GHz range signal. Spin transfer torque devices are one of the promising candidates for generating stable signal in the GHz range through collective precession of the local spins in one of the ferromagnetic layer, known as free layer. Another ferromagnetic layer, fixed layer, acts as a medium to…
Photonic Crystal Waveguide Sources of Photons for Quantum Communication Applications
Reliable sources of photons will be required to develop many photonic quantum technologies. Current on-demand sources are lacking in brightness, compactness, and scalability. Here, we review the use of silicon photonic crystal waveguides as nonlinear photon generators in the 1550 nm band. We show that these photon sources can create strong frequency correlations, that the…
Full-duplex MAC protocol based on adaptive contention window for visible light communication
As an alternative technology to radio-frequency-based communication, visible light communication(VLC) has attracted tremendous interest from both academia and industry. For its medium access control (MAC) protocol, most existing design has focused on the half-duplex mode, which can be inefficient for two-way communications. In this paper, we propose a novel full-duplex MAC protocol for VLC networks. Different from half-duplex…
Collision-free full-duplex UWB communication based on the Standard IEEE.802.15.4a
Using UWB for wireless short range, low rate communication is attracting growing interest due to its low power consumption and very high bandwidth. Regarding these qualities, it is comprehensible that there is an interest in the automation industry to use ultra-wideband-based wireless sensor nodes to replace wired systems, to save energy and to save costs without reducing…