33 research outputs found
LTE Spectrum Sharing Research Testbed: Integrated Hardware, Software, Network and Data
This paper presents Virginia Tech's wireless testbed supporting research on
long-term evolution (LTE) signaling and radio frequency (RF) spectrum
coexistence. LTE is continuously refined and new features released. As the
communications contexts for LTE expand, new research problems arise and include
operation in harsh RF signaling environments and coexistence with other radios.
Our testbed provides an integrated research tool for investigating these and
other research problems; it allows analyzing the severity of the problem,
designing and rapidly prototyping solutions, and assessing them with
standard-compliant equipment and test procedures. The modular testbed
integrates general-purpose software-defined radio hardware, LTE-specific test
equipment, RF components, free open-source and commercial LTE software, a
configurable RF network and recorded radar waveform samples. It supports RF
channel emulated and over-the-air radiated modes. The testbed can be remotely
accessed and configured. An RF switching network allows for designing many
different experiments that can involve a variety of real and virtual radios
with support for multiple-input multiple-output (MIMO) antenna operation. We
present the testbed, the research it has enabled and some valuable lessons that
we learned and that may help designing, developing, and operating future
wireless testbeds.Comment: In Proceeding of the 10th ACM International Workshop on Wireless
Network Testbeds, Experimental Evaluation & Characterization (WiNTECH),
Snowbird, Utah, October 201
Building the Future Internet through FIRE
The Internet as we know it today is the result of a continuous activity for improving network communications, end user services, computational processes and also information technology infrastructures. The Internet has become a critical infrastructure for the human-being by offering complex networking services and end-user applications that all together have transformed all aspects, mainly economical, of our lives. Recently, with the advent of new paradigms and the progress in wireless technology, sensor networks and information systems and also the inexorable shift towards everything connected paradigm, first as known as the Internet of Things and lately envisioning into the Internet of Everything, a data-driven society has been created. In a data-driven society, productivity, knowledge, and experience are dependent on increasingly open, dynamic, interdependent and complex Internet services. The challenge for the Internet of the Future design is to build robust enabling technologies, implement and deploy adaptive systems, to create business opportunities considering increasing uncertainties and emergent systemic behaviors where humans and machines seamlessly cooperate
Building the Future Internet through FIRE
The Internet as we know it today is the result of a continuous activity for improving network communications, end user services, computational processes and also information technology infrastructures. The Internet has become a critical infrastructure for the human-being by offering complex networking services and end-user applications that all together have transformed all aspects, mainly economical, of our lives. Recently, with the advent of new paradigms and the progress in wireless technology, sensor networks and information systems and also the inexorable shift towards everything connected paradigm, first as known as the Internet of Things and lately envisioning into the Internet of Everything, a data-driven society has been created. In a data-driven society, productivity, knowledge, and experience are dependent on increasingly open, dynamic, interdependent and complex Internet services. The challenge for the Internet of the Future design is to build robust enabling technologies, implement and deploy adaptive systems, to create business opportunities considering increasing uncertainties and emergent systemic behaviors where humans and machines seamlessly cooperate
Integração de funções de rede virtualizadas e funções de rede físicas
Network Functions Virtualization (NFV) and Software Defined Networking (SDN)
have been in the center of network evolution, promising a more flexible and efficient
way of managing networks through the on-demand instantiation of network
functions (NFs) and reconfigurability of the network as necessary. Nevertheless,
as new mechanisms are developed, such technologies require testing before their
adoption into real-world deployments. This is where this dissertation contributes,
by proposing and evaluating a system architecture that integrates a physical wireless
testbed with a cloud-based environment. This allows physical wireless nodes to
become part of the cloud environment, enabling its use and configuration as virtual
NFs (VNFs). Results showcased the system feasibility, with the testbed being able
to instantiate on-demand virtual and physical NFs, in the physical wireless nodes
and in an OpenStack data-center.A Virtualização de Funções de Rede e as Redes Definidas por Software têm estado
no centro da evolução das redes, prometendo uma forma mais flexível e eficiente
de as gerenciar através da instanciação on-demand de Funções de Rede e da sua
reconfiguração conforme o necessário. No entanto, à medida que novos mecanismos
são desenvolvidos, é também necessário a realização de testes sobre estas
tecnologias antes destas serem adotadas em implementações em contexto real.
É aqui que esta dissertação contribui, propondo e avaliando uma arquitetura de
sistema que integra um testbed físico sem fios, com um ambiente baseado em
nuvem. Isto permite que os nós sem fios físicos se tornem parte do ambiente de
nuvem, permitindo o seu uso e configuração como Funções de Rede Virtuais. Os
resultados demonstraram a viabilidade do sistema, dada a capacidade da testbed
em instanciar Funções de Rede virtuais e físicas quando requisitadas tanto nos nós
sem fios físicos quanto no servidor OpenStack.Mestrado em Engenharia Eletrónica e Telecomunicaçõe