Revisión de experiencias de T-learning

El presente artículo presenta una revisión de proyectos y propuestas en torno a la Televisión Digital Interactiva (TVDI) y su aplicación en diversos escenarios de aprendizaje. Se ha realizado una exploración bibliográfica que ha permitido tener un primer estadío de experiencias en relación a la temática de tlearning. Los autores han definido una serie de criterios de análisis para considerar en cada uno de los proyectos explorados, de manera tal de facilitar su comparación y revisión. Se detallan las experiencias analizadas y una serie de conclusiones vinculadas al estudio realizado que se cree permitirán ofrecer un panorama de la situación actual del t-learning. Esto constituye un aporte al área de aprendizaje mediado por TVDI, que se encuentra aún en pleno desarrollo e investigación, en particular en los países latinoamericanos.The present article presents a review of projects concerning the Interactive Television (ITV) and its application in diverse scenes of learning. A bibliographical exploration has been realized which has allowed us to have the first review of experiences in relation to t-learning. The authors have defined a series of criteria of analysis to be considered in each of the explored projects, in a such way of facilitating the comparison and review. The analyzed experiences and a series of conclusions are presented that will offer a panorama of the current situation of t-learning. This constitutes a contribution to the area of learning mediated by IDTV, which is in active research and development, particularly in Latin-American countries.Facultad de Informátic

Revisión de experiencias de T-learning

El presente artículo presenta una revisión de proyectos y propuestas en torno a la Televisión Digital Interactiva (TVDI) y su aplicación en diversos escenarios de aprendizaje. Se ha realizado una exploración bibliográfica que ha permitido tener un primer estadío de experiencias en relación a la temática de tlearning. Los autores han definido una serie de criterios de análisis para considerar en cada uno de los proyectos explorados, de manera tal de facilitar su comparación y revisión. Se detallan las experiencias analizadas y una serie de conclusiones vinculadas al estudio realizado que se cree permitirán ofrecer un panorama de la situación actual del t-learning. Esto constituye un aporte al área de aprendizaje mediado por TVDI, que se encuentra aún en pleno desarrollo e investigación, en particular en los países latinoamericanos.The present article presents a review of projects concerning the Interactive Television (ITV) and its application in diverse scenes of learning. A bibliographical exploration has been realized which has allowed us to have the first review of experiences in relation to t-learning. The authors have defined a series of criteria of analysis to be considered in each of the explored projects, in a such way of facilitating the comparison and review. The analyzed experiences and a series of conclusions are presented that will offer a panorama of the current situation of t-learning. This constitutes a contribution to the area of learning mediated by IDTV, which is in active research and development, particularly in Latin-American countries.Facultad de Informátic

Revisión de experiencias de T-learning

El presente artículo presenta una revisión de proyectos y propuestas en torno a la Televisión Digital Interactiva (TVDI) y su aplicación en diversos escenarios de aprendizaje. Se ha realizado una exploración bibliográfica que ha permitido tener un primer estadío de experiencias en relación a la temática de tlearning. Los autores han definido una serie de criterios de análisis para considerar en cada uno de los proyectos explorados, de manera tal de facilitar su comparación y revisión. Se detallan las experiencias analizadas y una serie de conclusiones vinculadas al estudio realizado que se cree permitirán ofrecer un panorama de la situación actual del t-learning. Esto constituye un aporte al área de aprendizaje mediado por TVDI, que se encuentra aún en pleno desarrollo e investigación, en particular en los países latinoamericanos.The present article presents a review of projects concerning the Interactive Television (ITV) and its application in diverse scenes of learning. A bibliographical exploration has been realized which has allowed us to have the first review of experiences in relation to t-learning. The authors have defined a series of criteria of analysis to be considered in each of the explored projects, in a such way of facilitating the comparison and review. The analyzed experiences and a series of conclusions are presented that will offer a panorama of the current situation of t-learning. This constitutes a contribution to the area of learning mediated by IDTV, which is in active research and development, particularly in Latin-American countries.Facultad de Informátic

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

Network-aware video streaming for future media Internet

272 p

QoE-Centric Control and Management of Multimedia Services in Software Defined and Virtualized Networks

Multimedia services consumption has increased tremendously since the deployment of 4G/LTE networks. Mobile video services (e.g., YouTube and Mobile TV) on smart devices are expected to continue to grow with the emergence and evolution of future networks such as 5G. The end user’s demand for services with better quality from service providers has triggered a trend towards Quality of Experience (QoE) - centric network management through efficient utilization of network resources. However, existing network technologies are either unable to adapt to diverse changing network conditions or limited in available resources. This has posed challenges to service providers for provisioning of QoE-centric multimedia services. New networking solutions such as Software Defined Networking (SDN) and Network Function Virtualization (NFV) can provide better solutions in terms of QoE control and management of multimedia services in emerging and future networks. The features of SDN, such as adaptability, programmability and cost-effectiveness make it suitable for bandwidth-intensive multimedia applications such as live video streaming, 3D/HD video and video gaming. However, the delivery of multimedia services over SDN/NFV networks to achieve optimized QoE, and the overall QoE-centric network resource management remain an open question especially in the advent development of future softwarized networks. The work in this thesis intends to investigate, design and develop novel approaches for QoE-centric control and management of multimedia services (with a focus on video streaming services) over software defined and virtualized networks. First, a video quality management scheme based on the traffic intensity under Dynamic Adaptive Video Streaming over HTTP (DASH) using SDN is developed. The proposed scheme can mitigate virtual port queue congestion which may cause buffering or stalling events during video streaming, thus, reducing the video quality. A QoE-driven resource allocation mechanism is designed and developed for improving the end user’s QoE for video streaming services. The aim of this approach is to find the best combination of network node functions that can provide an optimized QoE level to end-users through network node cooperation. Furthermore, a novel QoE-centric management scheme is proposed and developed, which utilizes Multipath TCP (MPTCP) and Segment Routing (SR) to enhance QoE for video streaming services over SDN/NFV-based networks. The goal of this strategy is to enable service providers to route network traffic through multiple disjointed bandwidth-satisfying paths and meet specific service QoE guarantees to the end-users. Extensive experiments demonstrated that the proposed schemes in this work improve the video quality significantly compared with the state-of-the- art approaches. The thesis further proposes the path protections and link failure-free MPTCP/SR-based architecture that increases survivability, resilience, availability and robustness of future networks. The proposed path protection and dynamic link recovery scheme achieves a minimum time to recover from a failed link and avoids link congestion in softwarized networks

Real-time neural network based video super-resolution as a service: design and implementation of a real-time video super-resolution service using public cloud services

Despite the advancements in video streaming, we still find limitations when there is the necessity to stream real-time video in a higher resolution (e.g., in super- resolution) through mobile devices with limited resources. This thesis work aims to give an option to address this challenge through a cloud service. There were two main code components to create this service. The first component was aiortc (e.g., the WebRTC python version), the streaming protocol. The second component was the Efficient Sub-Pixel Convolutional Neural Network (ESPCN)-model, one of the outstanding methods to upscale video at the present time. These two code components were implemented in a virtual machine in the Microsoft Azure cloud environment with a customized configuration. Qualitative as well as quantitative results of this work were obtained and analyzed. To obtain the qualitative results two versions of the ESPCN-model were developed and for the quantitative outcomes three different configurations of HW/SW codecs and CPU/GPU utilization were produced and analyzed. Besides finding and defining the code components mentioned before as optimal to create an efficient real-time video super-resolution service based on the cloud, an- other conclusion of this project is that sending or receiving information (frames) from the CPU to the GPU and vice-versa has a very big negative impact in the efficiency of the whole service. Hence, to limit this CPU-GPU interaction or to only use GPU (e.g., with the NVIDIA Virtual Processing Framework [VPF]) is critical for an efficient service. This issue can be avoided, as the quantitative results show, if a codec that only makes use of the GPU (e.g., a NVIDIA HW codec) is employed. Furthermore, the Azure cloud environment component, enables an efficient execution of the service in diverse mobile devices. In future, the quality measure of the video super-resolution done by the ESPCN- model is suggested as a next step to do

The Communicating Home - Definition, Evaluation and Business Opportunities for TeliaSonera in a 3-5 years perspective

The communicating home concept has been defined by identifying the dominating communication technologies to/from and in the homes, the most important customer behavior and user needs, the dominating products and the dominating actors of the industry. The evaluation of the communicating home industry has been performed with a five forces framework analysis and theories regarding value migration and value structures of industries. It has been concluded that actors of communication technologies, goods and access services will compete fiercely. The barriers of entry will however be high. When it comes to content services the situation is completely different. These actors will, to the largest extent, meet lower competition and low barriers of entry. As a consequence a value migration from communication technologies, goods and access services to content services will occur. TeliaSonera is suggested to develop a content service portal. It should, in its first version, contain IPTV, music on demand, video on demand, data security, online storing and online gaming in the first place. The TeliaSonera group has the right prerequisites to implement and capitalize on a content service portal. In addition to the content service portal some other business opportunities have also been addressed in the business model

Reducing Internet Latency : A Survey of Techniques and their Merit

Bob Briscoe, Anna Brunstrom, Andreas Petlund, David Hayes, David Ros, Ing-Jyh Tsang, Stein Gjessing, Gorry Fairhurst, Carsten Griwodz, Michael WelzlPeer reviewedPreprin

ACUTA Journal of Telecommunications in Higher Education

In This Issue President\u27s Message From the ACUTA CEO Advertiser Index Cables and the Cloud Snapshot: Spending Update High Expectations for the Campus Network NMSU Builds a Better VoIP LAN Harvard Turns to Technology for Teacher Evaluations Online Education: Interesting but Not Transformational? Campus Innovation and the lnternet of Things Face lt...Google Glass ls Coming Your Way Bandwidth 101 2013 lnstitutional Excellence Awar