Linux-Box: DVB and VoD streaming over local area networks

Aquest treball tracta sobre un projecte comú anomenat Linux-Box portat a terme per diferents persones al departament de Telecomunicacions (IET) de la Universitat de Pisa. Linux-Box és un sistema dotat amb targetes TDT (DVB-T) i de televisió per satèl·lit (DVB-S) que permet transmetre aquests senyals fins a un àmbit domèstic. Més endavant podria ser utilitzat en àmbits privats com les cases de clients o en institucions públiques com escoles, universitats, biblioteques i també seria possible en àmbits empresarials. El projecte està dividit en 4 apartats: 1. Ubuntu 6.06 LTS. Explica perquè s’utilitza Ubuntu en el projecte. A més també s’explica de forma breu que és Linux i les distribucions més utilitzades. 2. Multimedia Network Protocols: s’expliquen els diferents protocols desde la capa de xarxa fins la capa d’aplicació que s’utilitzen en el projecte Linux-Box. Aquests protocols són utilitzats tant en streaming, com en anunciació, unicast/multicast, encapsulat de vídeo i codecs. Els diversos temes tractats aquí es fan amb el propòsit de comparar i no només com a recerca teòrica. A la fi es veuen els programes utilitzats en el projecte per analitzar el tràfic de la xarxa. 3. Linux-Box: s’explica el funcionament i els objectius globals del projecte. Es dedica un sub-apartat a “VideoLan - VLC” part important a nivell de sofware. Més endavant es parla de les característiques de la Linux-Box de forma acurada: streaming de VoD i senyals de TV i s’analitzen els problemes coneguts i les seves solucions proposades. A la fi s’enumeren els llenguatges de programació utilitzats al projecte i en quina part s’utilitzen. Observarem que és una aplicació on diversos llenguatges de programació estan contínuament solapats. 4. Developed Part: es posa en pràctica la teoria estudiada a la resta del treball. Està dividida en 4 seccions: Desenvolupar una aplicació en codi C per convertir la llista de Canals (tant terrestre com de satèl·lit) en format XML. Una secció dedicada al streaming de Canals de TV a la pàgina web principal. Un anàlisis profund dels paquets creats per la Linux-Box i la seva activitat a la xarxa. Finalment s’analitzen els diferents scripts i les seves configuracions. Alguns són útils per a un futur desenvolupament i d’altres s’utilitzen en seccions prèvies. 5. Conclusions: conté les conclusions i línies futures. El projecte compta amb diverses opcions que encara poden ser implementades i estudiades. Aquí exposem les nostres interpretacions i possibles línies futures d’estudi

Linux-Box: DVB and VoD streaming over local area networks

Aquest treball tracta sobre un projecte comú anomenat Linux-Box portat a terme per diferents persones al departament de Telecomunicacions (IET) de la Universitat de Pisa. Linux-Box és un sistema dotat amb targetes TDT (DVB-T) i de televisió per satèl·lit (DVB-S) que permet transmetre aquests senyals fins a un àmbit domèstic. Més endavant podria ser utilitzat en àmbits privats com les cases de clients o en institucions públiques com escoles, universitats, biblioteques i també seria possible en àmbits empresarials. El projecte està dividit en 4 apartats: 1. Ubuntu 6.06 LTS. Explica perquè s’utilitza Ubuntu en el projecte. A més també s’explica de forma breu que és Linux i les distribucions més utilitzades. 2. Multimedia Network Protocols: s’expliquen els diferents protocols desde la capa de xarxa fins la capa d’aplicació que s’utilitzen en el projecte Linux-Box. Aquests protocols són utilitzats tant en streaming, com en anunciació, unicast/multicast, encapsulat de vídeo i codecs. Els diversos temes tractats aquí es fan amb el propòsit de comparar i no només com a recerca teòrica. A la fi es veuen els programes utilitzats en el projecte per analitzar el tràfic de la xarxa. 3. Linux-Box: s’explica el funcionament i els objectius globals del projecte. Es dedica un sub-apartat a “VideoLan - VLC” part important a nivell de sofware. Més endavant es parla de les característiques de la Linux-Box de forma acurada: streaming de VoD i senyals de TV i s’analitzen els problemes coneguts i les seves solucions proposades. A la fi s’enumeren els llenguatges de programació utilitzats al projecte i en quina part s’utilitzen. Observarem que és una aplicació on diversos llenguatges de programació estan contínuament solapats. 4. Developed Part: es posa en pràctica la teoria estudiada a la resta del treball. Està dividida en 4 seccions:  Desenvolupar una aplicació en codi C per convertir la llista de Canals (tant terrestre com de satèl·lit) en format XML.  Una secció dedicada al streaming de Canals de TV a la pàgina web principal.  Un anàlisis profund dels paquets creats per la Linux-Box i la seva activitat a la xarxa.  Finalment s’analitzen els diferents scripts i les seves configuracions. Alguns són útils per a un futur desenvolupament i d’altres s’utilitzen en seccions prèvies. 5. Conclusions: conté les conclusions i línies futures. El projecte compta amb diverses opcions que encara poden ser implementades i estudiades. Aquí exposem les nostres interpretacions i possibles línies futures d’estudi

The Rising Preference to Real-Time Broadcasting Effects upon Traditional Multi-Media Broadcasting Solutions

Originally the Internet was a research-based arena but today the applications available are greatly diversified and extremely advanced. Media broadcasting on a real time basis is that which characterizes many providers business base in service, applications, soft and hardware needs. Today\u27s engineers are driven toward making provisions of new and superior applications to make the Internet stronger and more serviceable. Along with the new dimension of today\u27s Internet come new challenges. Videoconferencing and video broadcasting are mainstream entrant applications. These applications specifically those of videoconferencing and broadcasting place previously unheard of demands on the response-load of the network effecting data in terms of efficiency and effectiveness in data delivery. The new analog type delivery used today has opened the Internet up for new usefulness. This work explores the changes and the new technologies unleashed as well as observing how other advantages in IP networks still need to be realized, making determination of the roadblocks in achieving a competitive advantage in IP networks and evaluate the developments in broadcasting; determining other resources that need to be realized and identifying the chances that traditional broadcasting technology will revolutionize and catch up with IP broadcasting. Finally this work will assess what it would take to achieve the development of broadcasting technologies

Development and standardization of an embedded Linux based triple-play IP settop box

Thesis (Master)--Izmir Institute of Technology, Electronics and Communication Engineering, Izmir, 2007Includes bibliographical references (leaves: 46-48)Text in English; Abstract: Turkish and Englishix, 57 leavesWith the recent enhancements to the delivery of IP services and of the video codecs such as h.264, transmission of television through IP-based communication systems has been a viable option. An IP settop box (IPSTB) constructs a bridge between a television set and a broadband IP network such as DSL, cable modem, powerline or wireless broadband. IPSTB brings new challenges for the system designers, especially in the areas of inherently organized home networking systems, protocols, and architectures. Future IPSTB products are candidate to converge the information and entertainment technologies. This thesis suggests newly developed device and service discovery methods for the design of an IPSTB software structure that is compatible with the Universal Plug and Play (UPnP) audio video (AV) device descriptions. At the design process, it suggests optimized communication schemes between the servers that are in the control of service providers, and the consumer IPSTBs. As a newly developed technology, since there is not any standardization for most parts of the overall IPTV system, this thesis takes proven mechanisms as basis and adapts them to the overall design that consists of the hardware drivers, middleware, and the additional programs which helps the middleware to handle the external components of the system connected via USB or serial interfaces. Being an innovative idea, we have used a control system called Virtual Bus Manager so as to communicate between the aforementioned system components. Some system components such as web browser is based on the X Windows architecture, so cross compiling the X system for the embedded platform has also been a challenge for the feasibility of the final design. Being the second part of the Triple-Play system, Voice over IP application has also been included and based on the compilation of open source software for the corresponding embedded system. Finally, the web browser itself has been based on the popular Gecko web-core that is derived from Firefox

Design and Performance Analysis of Functional Split in Virtualized Access Networks

abstract: Emerging modular cable network architectures distribute some cable headend functions to remote nodes that are located close to the broadcast cable links reaching the cable modems (CMs) in the subscriber homes and businesses. In the Remote- PHY (R-PHY) architecture, a Remote PHY Device (RPD) conducts the physical layer processing for the analog cable transmissions, while the headend runs the DOCSIS medium access control (MAC) for the upstream transmissions of the distributed CMs over the shared cable link. In contrast, in the Remote MACPHY (R-MACPHY) ar- chitecture, a Remote MACPHY Device (RMD) conducts both the physical and MAC layer processing. The dissertation objective is to conduct a comprehensive perfor- mance comparison of the R-PHY and R-MACPHY architectures. Also, development of analytical delay models for the polling-based MAC with Gated bandwidth alloca- tion of Poisson traffic in the R-PHY and R-MACPHY architectures and conducting extensive simulations to assess the accuracy of the analytical model and to evaluate the delay-throughput performance of the R-PHY and R-MACPHY architectures for a wide range of deployment and operating scenarios. Performance evaluations ex- tend to the use of Ethernet Passive Optical Network (EPON) as transport network between remote nodes and headend. The results show that for long CIN distances above 100 miles, the R-MACPHY architecture achieves significantly shorter mean up- stream packet delays than the R-PHY architecture, especially for bursty traffic. The extensive comparative R-PHY and R-MACPHY comparative evaluation can serve as a basis for the planning of modular broadcast cable based access networks.Dissertation/ThesisDoctoral Dissertation Electrical Engineering 201

SDN/NFV-enabled satellite communications networks: opportunities, scenarios and challenges

In the context of next generation 5G networks, the satellite industry is clearly committed to revisit and revamp the role of satellite communications. As major drivers in the evolution of (terrestrial) fixed and mobile networks, Software Defined Networking (SDN) and Network Function Virtualisation (NFV) technologies are also being positioned as central technology enablers towards improved and more flexible integration of satellite and terrestrial segments, providing satellite network further service innovation and business agility by advanced network resources management techniques. Through the analysis of scenarios and use cases, this paper provides a description of the benefits that SDN/NFV technologies can bring into satellite communications towards 5G. Three scenarios are presented and analysed to delineate different potential improvement areas pursued through the introduction of SDN/NFV technologies in the satellite ground segment domain. Within each scenario, a number of use cases are developed to gain further insight into specific capabilities and to identify the technical challenges stemming from them.Peer ReviewedPostprint (author's final draft

Wireless communication, identification and sensing technologies enabling integrated logistics: a study in the harbor environment

In the last decade, integrated logistics has become an important challenge in the development of wireless communication, identification and sensing technology, due to the growing complexity of logistics processes and the increasing demand for adapting systems to new requirements. The advancement of wireless technology provides a wide range of options for the maritime container terminals. Electronic devices employed in container terminals reduce the manual effort, facilitating timely information flow and enhancing control and quality of service and decision made. In this paper, we examine the technology that can be used to support integration in harbor's logistics. In the literature, most systems have been developed to address specific needs of particular harbors, but a systematic study is missing. The purpose is to provide an overview to the reader about which technology of integrated logistics can be implemented and what remains to be addressed in the future