Pervasive Communication Systems Research Articles

Optimization of received signal strength in visible light communication using the combination of heuristic algorithms

SummaryLEDs are a prominent technique for a pervasive communication system using visible light communication (VLC), since LED includes long life expectancy, fast switching, and being visible light and is less expensive, which is safe for the human body, though still many technical problems presented to be addressed, especially in an indoor environment. Due to this, the major aim of this task is to afford a hybridized optimization algorithm that is highly suitable for enabling the signal to noise ratio (SNR) and received signal strength (RSS) maximization in VLC. Here, the coordinate of each point of the receiver photo detector in the VLC system is tuned by the new hybridized algorithm. The fusion of two optimization algorithms like Deer Hunting Optimization Algorithm (DHOA) and Dragonfly Algorithm (DA) termed as Fitness‐oriented Dragonfly‐based DHOA (FD‐DHOA) is used to attain the objective concerning the RSS or received power and SNR. The proposed model tries to attain maximum RSS and SNR at the receiver instead of calculating it at every angle. Moreover, the experimental analysis proves that the developed model validates the orientation that generates an optimum RSS and SNR value at the receiver.

Simultaneous 10 Gbps data and clock transmission for smart power grid application utilizing the optical fibre and VCSEL technology

The study seeks to design a communication system for a power grid, that will ensure real-time and low-latency communication and automation between the utility and the end users. The performance characterization of the VCSEL in G.655 non-zero dispersion shifted fibre transmitting at 1550 nm is experimentally and theoretically analysed. The experiment reported the various evaluations of BER and eye diagrams using a VCSEL and a DFB laser as light sources. There was the successful achievement of 10 Gbps in 25 and 50 km for VCSEL and DFB respectively. In simultaneous data and clock transmission, 0.4 GHz and 10 Gbps over 25 km was successfully achieved using a VCSEL. The study is significant in the establishment of a pervasive communication system as the backbone of smart power grid design technology.

D2D pervasive communication system with out-of-band control autonomous to 5G networks

D2D (device-to-device) communication is one of the developments of 5G networks (5th generation mobile networks) that reduce mobile traffic load, reduce energy consumption and effectively use the available electrical radio spectrum. An increase in the number of mobile devices might, in theory, promote D2D communications to 5G networks; however, in practice, the D2D communications technologies, such as Wi-Fi Ad-Hoc, Bluetooth and Wi-Fi Direct, are not available or require human interaction. To overcome these limitations, a middleware based on Wi-Fi infrastructure mode, which establishes connections and performs data exchange without human interaction, is presented. Practical proofs of the concept demonstrate that the middleware enables transparent D2D communications for 5G applications.

Wireless World 2020: Radio Interface Challenges and Technology Enablers

Future pervasive communication system requirements for two to three orders of magnitude capacity improvement, flexible, fast deployment, and cost/energy efficiency are expected to revolutionize the way we design and use wireless networks. From a network infrastructure perspective, the emphasis is placed on achieving ubiquitous, real-time high data rate communications ?anytime-anywhere,? including at cell-edge, through Small Cell Network architectures and Heterogeneous Cellular Networks (HetNets). From a pervasive systems? perspective, the vision of the Internet of Things suggests the integration between ubiquitous computing and wireless communications targeting a reliable connectivity of things, i.e., computers, sensors, and everyday objects equipped with transceivers. From a backhaul bandwidth, network resource sharing, and optimization perspective, cloud-based processing and radio access network virtualization provide a revolutionary approach toward balancing the degree of centralization of physical and virtual resources management. In this article we analyze these three trends, present key technology enablers, and assess suitable performance merits in an effort to set the scene for the wireless evolution in the era beyond 2020.

Special issue on “security and privacy in pervasive and ubiquitous computing and communication systems”

Special issue on “security and privacy in pervasive and ubiquitous computing and communication systems”

An application-level framework for information dissemination and collection in vehicular networks

Mobility of wireless network nodes is increasingly regarded as a fundamental resource for future pervasive communication systems. In this paper, we leverage the movement of communication-enabled vehicles to implement an original Application-level Role Mobility (ARM) framework. ARM allows nodes to share a generic assignment, by handing each other the associated application-level role. The handover of the role is performed according to the mobility patterns of the vehicles, following rules that are specific to the objective of the application. We employ the ARM framework for two different tasks: dissemination of information to traveling cars, and data collection from road-side sensors. For each application, we provide dedicated role handover rules and show, via simulation, that ARM can successfully perform the required operations in a lightweight, fully distributed way.

An integrated communications framework for context aware continuous monitoring with body sensor networks

This paper deals with a wireless pervasive communication system to support advanced healthcare applications. The proposed system is based on an ad hoc interaction of mobile body sensor networks with independent wireless sensor networks already deployed within the environments in order to allow a continuous and context aware health monitoring for patients along their daily life scenarios with an unprecedented precision and flexibility of sensing. After an accurate protocol characterization, simulation results are provided, underlining remarkable performance with respect to existing solutions, for different mobility models and node density values.

Call for Papers: Special issue on security and privacy in pervasive and ubiquitous computing and communication systems (security and communication networks)

Call for Papers: Special issue on security and privacy in pervasive and ubiquitous computing and communication systems (security and communication networks)

Supporting Relationship Maintenance for Elders and Family Living Abroad

A user-centered design approach based on ethnographic interviews and prototype evaluations, our research group envisioned a home-based pervasive communication system. The Electronic Family Newspaper (EFN) facilitates communication between elders and their families living abroad. The system is a blogging tool that operates on a tablet PC. Family members can access the system through any Web browser. The EFN lets users share messages, attach pictures, and create news sections, and elders can play the included memory game (based on revealing pairs of pictures).