Design of Interactive Visualizations for Next-Generation Ultra-Large Communication Networks

© 2013 IEEE. With the increasing size and complexity of next-generation communication networks, it is critical to utilize interactive visualizations to support the monitoring, planning, and management of networks. Effectively visualizing large-scale networks is difficult with traditional methods because of the high link density and complex node relationships. Given the limited screen space, to assist Internet Service Provider\u27s (ISP) network planning and management activities, investigating how to present ultra-large-scale network data efficiently is crucial. This paper presents a real-Time interactive visualization system that combines the design strategies of progressive disclosure and multiple panels to elegantly visualize the large-scale networks and avoid the information-overload problem. The system also visualizes the configuration of the network elements and provides the network performance information, including the port-level Quality of Service (QoS) metrics. Furthermore, the system enables navigation through the port-level connection and provides different modes for multiple purposes

Design of Interactive Visualizations for Next-Generation Ultra-Large Communication Networks

With the increasing size and complexity of next-generation communication networks, it is critical to utilize interactive information visualization to support the network monitoring, planning, and management. Effectively visualizing large-scale networks has been considered difficult with traditional methods because of the high link density and complicated node relationship. Given the limited screen space, it is essential to explore how to present ultra-large-scale network data efficiently that can assist Internet Service Provider’s (ISP) network planning and management activities. This work proposes a design of the real-time interactive visualization system that combines the idea of progressive disclosure and multiple panels to elegantly visualize the large-scale network and avoid the information-overloaded problem. The system also visualizes the configuration of the network elements and provides the network performance information, including the port-level Quality of Service (QoS) metrics. Additionally, the system enables navigation through the port-level connection and provides different modes for multiple purposes

Self-configuration and self-optimization process with Taguchi method in hybrid optical wireless network

In this paper, an alternative improvement is proposed which is the adaptive wireless access networks-based optical backhaul convergence that will greatly promote to use the existing resource of MANET (mobile ad hoc network). However, these characteristics itself acts as a drawback to the MANET applications such as the random distribution of nodes and continuously changing topology. MiNiTab statistical software was used to model the effect of the parameter variation to predict the field quality through the design of experiments while OMNeT++ network simulation was created to visualize the effect of QoS performance study in response with varying speed scenario. The result shows that the proposed ESCMDR scheme can obtain robustness and outperformed compared to the nonTaguchi previous study when it is used in random waypoint mobility model in any speed of sources. The work is based on Packet Delivery Ratio (PDR) and Packet Loss Probability (PLP) metric under the varying speed scenario. It results in better QoS network PDR of 28.9% improvement, with 83.56% improvement on average PLP. The paper shows that the MANET QoS performance constrained can be addressed with the self-configured data rate of integrated optimization with Taguchi method on AODV-UU (Adhoc On Demand Distance Vector-Uppsala University) routing technique

Analysis, evaluation and improvement of RT-WMP for real-time and QoS wireless communication: Applications in confined environments

En los ultimos años, la innovación tecnológica, la característica de flexibilidad y el rápido despligue de las redes inalámbricas, han favorecido la difusión de la redes móviles ad-hoc (MANETs), capaces de ofrecer servicios para tareas específicas entre nodos móviles. Los aspectos relacionados al dinamismo de la topología móvil y el acceso a un medio compartido por naturaleza hacen que sea preciso enfrentarse a clases de problemas distintos de los relacionados con la redes cableadas, atrayendo de este modo el interés de la comunidad científica. Las redes ad-hoc suelen soportar tráfico con garantía de servicio mínimo y la mayor parte de las propuestas presentes en literatura tratan de dar garantías de ancho de banda o minimizar el retardo de los mensajes. Sin embargo hay situaciones en las que estas garantías no son suficientes. Este es el caso de los sistemas que requieren garantías mas fuertes en la entrega de los mensajes, como es el caso de los sistemas de tiempo real donde la pérdida o el retraso de un sólo mensaje puede provocar problemas graves. Otras aplicaciones como la videoconferencia, cada vez más extendidas, implican un tráfico de datos con requisitos diferentes, como la calidad de servicio (QoS). Los requisitos de tiempo real y de QoS añaden nuevos retos al ya exigente servicio de comunicación inalámbrica entre estaciones móviles de una MANET. Además, hay aplicaciones en las que hay que tener en cuenta algo más que el simple encaminamiento de los mensajes. Este es el caso de aplicaciones en entornos subterráneos, donde el conocimiento de la evolución de propagación de la señal entre los diferentes nodos puede ser útil para mejorar la calidad de servicio y mantener la conectividad en cada momento. A pesar de ésto, dentro del amplio abanicos de propuestas presente en la literatura, existen un conjunto de limitaciones que van de el mero uso de protocolos simulados a propuestas que no tienen en cuenta entornos no convencionales o que resultan aisladas desde el punto de vista de la integración en sistemas complejos. En esta tesis doctoral, se propone un estudio completo sobre un plataforma inalámbrica de tiempo real, utilizando el protocolo RT-WMP capaz de gestionar trafíco multimedia al mismo tiempo y adaptado al entorno de trabajo. Se propone una extensión para el soporte a los datos con calidad de servicio sin limitar las caractaristícas temporales del protocolo básico. Y con el fin de tener en cuenta el efecto de la propagación de la señal, se caracteriza el entorno por medio de un conjunto de restricciones de conectividad. La solución ha sido desarrollada y su validez ha sido demostrada extensamente en aplicaciones reales en entornos subterráneos, en redes malladas y aplicaciones robóticas

Visualização de mobilidade e multihoming em redes sem fios

Engenharia Eletrónica e TelecomunicaçõesNos últimos anos, as pessoas têm-se tornado cada vez mais dependentes do uso de dispositivos móveis pessoais. Desta forma, tornouse indispensável fornecer acesso à Internet aos dispositivos dos utilizadores, em qualquer lugar e em qualquer altura. Estes utilizadores estão em constante movimento, logo a mobilidade apresenta um fator chave nas comunicações nos dias de hoje. A utilização de Hostmultihoming permite que os dispositivos dos utilizadores, que possuam várias interfaces de rede, passam estar ligados simultaneamente a várias redes de acesso. Com esta abordagem é possível aproveitar melhor os recursos que se encontram ao alcance do utilizador e fornecer uma ligação mais fiável. Com a integração de mobilidade e multihoming em redes sem fios é possível satisfazer as exigências cada vez mais elevadas dos utilizadores e oferecer uma melhor experiência de utilização. Com estes mecanismos implementados na rede é agora importante apresentar as suas características e funcionalidades. A forma mais intuitiva e interessante de perceber as mudanças que ocorrem na rede é através de uma plataforma de visualização. Para demonstrar as funcionalidades é necessário interagir com os nós da rede e despoletar remotamente eventos na rede. Estes eventos também devem ser visualizados de modo a perceber as mudanças que ocorrem na rede. O objetivo desta dissertação é desenvolver uma plataforma de visualização capaz de visualizar mobilidade e multihoming na rede, e interagir com a rede para despoletar remotamente eventos na mesma. Para atingir este objetivo, desenvolveu-se e integrou-se uma framework num protocolo de mobilidade com suporte para multihoming. De forma a demonstrar as funcionalidades da plataforma desenvolvida, implementaram-se duas testbeds em ambiente laboratorial, e de seguida realizaram-se testes para verificar as funcionalidades implementadas e o seu desempenho.In the last years we have witnessed that people are becoming increasingly dependent on the use of personal mobile devices. Providing Internet access to users’ devices while maintaining Quality-of-service has become indispensable. The users are constantly moving, and mobility presents a key factor in today’s communications. Host-multihoming allows end-user devices equipped with multiple network interfaces to be simultaneously connected to multiple access networks. This can optimally leverage the resources that are in the range of the end-user device and provide a greater sense of connection reliability. Implementing both mobility and multihoming in wireless networks can accommodate the increasing demands of the users and provide better user experience and network utilization. When these mechanisms are implemented in the network, it is important to present their features and demonstrate their functionalities. Visualization provides an intuitive and interesting way of understanding the changes that occur in the network. In order to demonstrate the functionalities, it is necessary to interact with the network nodes and remotely trigger network actions. These actions should also be visualized to understand the changes that happened in the network. The objective of this Dissertation is to develop a visualization platform able both to visualize mobility and multihoming in the network, and interact with the network to remotely trigger network actions. For this purpose, a framework has been developed and integrated in a mobility protocol with multihoming support. To demonstrate the functionalities of the developed platform, a testbed has been deployed in the laboratory environment and tests were performed to verify the implemented functionalities and evaluate its performance. The results show that the platform is able to visualize both mobility and multihoming in real-time. Also, the platform can interact with the network nodes in order to trigger network related actions, and visualize the result of these actions

A Survey on Information Visualization for Network and Service Management

Network and service management encompasses a set of activities, methods, procedures, and tools whose ultimate goal is to guarantee the proper functioning of a networked system. Computational tools are essential to help network administrators in their daily tasks, and information visualization techniques are of great value in such context. In essence, information visualization techniques associated to visual analytics aim at facilitating the tasks of network administrators in the process of monitoring and maintaining the network health. This paper surveys the use of information visualization techniques as a tool to support the network and service management process. Through a Systematic Literature Review (SLR), we provide a historical overview and discuss the current state of the art in the field. We present a classification of 285 articles and papers from 1985 to 2013, according to an information visualization taxonomy as well as a network and service management taxonomy. Finally, we point out future research directions and opportunities regarding the use of information visualization in network and service management

SIMULATION AND ANALYSIS OF VEHICULAR AD-HOC NETWORKS IN URBAN AND RURAL AREAS

According to the American National Highway Traffic Safety Administration, in 2010, there were an estimated 5,419,000 police-reported traffic crashes, in which 32,885 people were killed and 2,239,000 people were injured in the US alone. Vehicular Ad-Hoc Network (VANET) is an emerging technology which promises to decrease car accidents by providing several safety related services such as blind spot, forward collision and sudden braking ahead warnings. Unfortunately, research of VANET is hindered by the extremely high cost and complexity of field testing. Hence it becomes important to simulate VANET protocols and applications thoroughly before attempting to implement them. This thesis studies the feasibility of common mobility and wireless channel models in VANET simulation and provides a general overview of the currently available VANET simulators and their features. Six different simulation scenarios are performed to evaluate the performance of AODV, DSDV, DSR and OLSR Ad-Hoc routing protocols with UDP and TCP packets. Simulation results indicate that reactive protocols are more robust and suitable for the highly dynamic VANET networks. Furthermore, TCP is found to be more suitable for VANET safety applications due to the high delay and packet drop of UDP packets.fi=Opinnäytetyö kokotekstinä PDF-muodossa.|en=Thesis fulltext in PDF format.|sv=Lärdomsprov tillgängligt som fulltext i PDF-format

A LoRaWAN Architecture for Communications in Areas without Coverage: Design and Pilot Trials

This research was partially funded by the Andalusian Knowledge Agency (projects A-TIC-241-UGR18 and B-TIC-568-UGR20), the Spanish Ministry of Science and Innovation (project PID2019-108713RB-C53), the Spanish Ministry of Economic Affairs and Digital Transformation (project TSI-063000-2021-28) and the Spanish Ministry of Universities (FPU Grant Number: 20/02621).This article proposes a system based on a long-distance communications system with low economic and energy costs that allows connectivity to be carried out independently from the existing cellular coverage in the area. In addition, it describes the design, development, implementation and analysis of an Internet of Things (IoT) architecture based on Long-RangeWide-Area Network (LoRaWAN). Moreover, the system has been deployed as a prototype, and the behavior and scope of the system have been analyzed in various real environments: urban, rural and natural. The results obtained from the analysis show that the system is suitable for working in areas without coverage such as mountains.Andalusian Knowledge Agency A-TIC-241-UGR18 B-TIC-568-UGR20Spanish Government PID2019-108713RB-C53Spanish Ministry of Economic Affairs and Digital Transformation TSI-063000-2021-28Spanish Ministry of Universities (FPU) 20/0262