142 research outputs found
Deliverable DJRA1.2. Solutions and protocols proposal for the network control, management and monitoring in a virtualized network context
This deliverable presents several research proposals for the FEDERICA network, in different subjects, such as monitoring, routing, signalling, resource discovery, and isolation. For each topic one or more possible solutions are elaborated, explaining the background, functioning and the implications of the proposed solutions.This deliverable goes further on the research aspects within FEDERICA. First of all the architecture of the control plane for the FEDERICA infrastructure will be defined. Several possibilities could be implemented, using the basic FEDERICA infrastructure as a starting point. The focus on this document is the intra-domain aspects of the control plane and their properties. Also some inter-domain aspects are addressed. The main objective of this deliverable is to lay great stress on creating and implementing the prototype/tool for the FEDERICA slice-oriented control system using the appropriate framework. This deliverable goes deeply into the definition of the containers between entities and their syntax, preparing this tool for the future implementation of any kind of algorithm related to the control plane, for both to apply UPB policies or to configure it by hand. We opt for an open solution despite the real time limitations that we could have (for instance, opening web services connexions or applying fast recovering mechanisms). The application being developed is the central element in the control plane, and additional features must be added to this application. This control plane, from the functionality point of view, is composed by several procedures that provide a reliable application and that include some mechanisms or algorithms to be able to discover and assign resources to the user. To achieve this, several topics must be researched in order to propose new protocols for the virtual infrastructure. The topics and necessary features covered in this document include resource discovery, resource allocation, signalling, routing, isolation and monitoring. All these topics must be researched in order to find a good solution for the FEDERICA network. Some of these algorithms have started to be analyzed and will be expanded in the next deliverable. Current standardization and existing solutions have been investigated in order to find a good solution for FEDERICA. Resource discovery is an important issue within the FEDERICA network, as manual resource discovery is no option, due to scalability requirement. Furthermore, no standardization exists, so knowledge must be obtained from related work. Ideally, the proposed solutions for these topics should not only be adequate specifically for this infrastructure, but could also be applied to other virtualized networks.Postprint (published version
Methodology for avionics integration optimisation
Every state-of-art aircraft has a complex distributed systems of avionics Line
Replaceable Units/Modules (LRUs/LRMs), networked by several data buses.
These LRUs are becoming more complex because of the increasing number of
new avionics functions need to be integrated in an avionics LRU. The evolution
of avionics data buses and architectures have moved from distributed analogue
and federated architecture to digital Integrated Modular Avionics (IMA). IMA
architecture allows suppliers to develop their own LRUs/LRMs capable of specific
features that can then be offered to Original Equipment Manufacturers (OEMs)
as Commercial-Off-The-Shelf (COTS) products. In the meantime, the aerospace
industry has been investigating new solutions to develop smaller, lighter and
more capable avionics LRUs to be integrated into avionics architecture.
Moreover, the complexity of the overall avionics architecture and its impact on
cable length, weight, power consumption, reliability and maintainability of
avionics systems encouraged manufacturers to incorporate efficient avionics
architectures in their aircraft design process. However, manual design cannot
concurrently fulfil the complexity and interconnectivity of system requirements
and optimality. Thus, developing computer-aided design (CAD), Model Based
System Engineering (MBSE) tools and mathematical modelling for optimisation
of IMA architecture has become an active research area in avionics systems
integration.
In this thesis, a general method and tool are developed for optimisation of
avionics architecture and improving its operational capability. The tool has three
main parts including a database of avionics LRUs, mathematical modelling of the
architectures and optimisation algorithms. The developed avionics database
includes avionics LRUs with their technical specifications and operational
capabilities for each avionics function. A MCDM method, SAW, is used to quantify
and rank each avionics LRU’s operational capability. Based on the existing
avionics LRUs in the database and aircraft level avionics requirements two
avionics architectures are proposed i.e. AFCS architecture (SSA) and avionics
architecture (LSA). The proposed avionics architectures are then modelled using mathematical programming. Further, the allocation of avionics LRUs to avionics
architecture and mapping the avionics LRUs to their installation locations are
defined as an assignment problem in Integer Programming (IP) format. The
defined avionics architecture optimisation problem is to optimise avionics
architecture in terms of mass, volume, power consumption, MTBF and
operational capability. The problems are solved as both single-objective and
multi-objective optimisation using the branch-and-bound algorithm, weighted sum
method and Particle Swarm Optimisation (PSO) algorithm. Finally, the tool
provides a semi-automatic optimisation of avionics architecture. This helps
avionics system architects to investigate and evaluate various architectures in the
early stage of design from an LRU perspective. It can also be used to upgrade a
legacy avionics architecture.Aerospac
Advances in Grid Computing
This book approaches the grid computing with a perspective on the latest achievements in the field, providing an insight into the current research trends and advances, and presenting a large range of innovative research papers. The topics covered in this book include resource and data management, grid architectures and development, and grid-enabled applications. New ideas employing heuristic methods from swarm intelligence or genetic algorithm and quantum encryption are considered in order to explain two main aspects of grid computing: resource management and data management. The book addresses also some aspects of grid computing that regard architecture and development, and includes a diverse range of applications for grid computing, including possible human grid computing system, simulation of the fusion reaction, ubiquitous healthcare service provisioning and complex water systems
Telecommunications Networks
This book guides readers through the basics of rapidly emerging networks to more advanced concepts and future expectations of Telecommunications Networks. It identifies and examines the most pressing research issues in Telecommunications and it contains chapters written by leading researchers, academics and industry professionals. Telecommunications Networks - Current Status and Future Trends covers surveys of recent publications that investigate key areas of interest such as: IMS, eTOM, 3G/4G, optimization problems, modeling, simulation, quality of service, etc. This book, that is suitable for both PhD and master students, is organized into six sections: New Generation Networks, Quality of Services, Sensor Networks, Telecommunications, Traffic Engineering and Routing
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Contextually and identity aware 5G services
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University LondonThe fifth generation (5G) mobile networks aim to be ten times faster than the existing 4G connection, whilst providing low latency, and flexibility. Hence, various alterations are planned to the existing network infrastructure to be able to reach the 5G expected performance levels. The main technologies that were used, to ensure high performance, flexible network, and efficient resource allocation, are Software Defined Network and Network Function Virtualization. As these technologies are replacing the device-based architecture with, a service-based architecture.
This thesis provides a design of location database interactive web interface and interactive mobile application. The implementation of real time video streaming location server, the streaming system's performance parameters demonstrated a high level of QoS (0.07ms jitter and 9.53ms delay). In regard to experimental examination, it measured the localisation coverage, accuracy measurements and a highly scalable security solution. The localisation coverage and accuracy measurements were achieved through the mmWave and VLC link transmitters. The proposed simulated annealing algorithm aimed at data optimisation for location measurements accuracy showed results of the average location error of x and y which showed significant improvement from x= 22.5 and y=21.6 to x=11.09 and y= 11.63.
The proposed indoor location security solution showed significant results, as it provides a high scalability solution using the VNF. The solution showed that it was not 100% effective, as some of the fake discover packets still reached the DHCP server. This was due to the high load of traffic passing through the network. Nonetheless, 90% of the fake DHCP discover packets never reached the DHCP server because the scripts began blocking all fake discover packets after realising it was an attack. This conveys that the proposed system was able to run successfully without crashing or overloading the controller.
Overall, the main challenges facing 5G have been addressed with their proposed solutions, which showed promising results. Conclusively showing that there is a lot more space for technological advancements to support the future of mobile networks.European Union’s Horizon 2020 research program - the Internet of Radio-Light (IoRL) project H2020-ICT 761992
Modelling, Dimensioning and Optimization of 5G Communication Networks, Resources and Services
This reprint aims to collect state-of-the-art research contributions that address challenges in the emerging 5G networks design, dimensioning and optimization. Designing, dimensioning and optimization of communication networks resources and services have been an inseparable part of telecom network development. The latter must convey a large volume of traffic, providing service to traffic streams with highly differentiated requirements in terms of bit-rate and service time, required quality of service and quality of experience parameters. Such a communication infrastructure presents many important challenges, such as the study of necessary multi-layer cooperation, new protocols, performance evaluation of different network parts, low layer network design, network management and security issues, and new technologies in general, which will be discussed in this book
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