Experience with fibre channel in the environment of the ATLAS DAQ protoype "-1" project

Fibre Channel equipment has been evaluated in the environment of the ATLAS DAQ prototype "-1". Fibre Channel PCI and PMC cards have been tested on PwerPC-based VME processor boards running LynxOS and on Pentium-based personal computers running Windows NT. The performance in terms of overhead and bandwidth has been measured in point-to-point, arbitrated loop and fabric configuration with a Fibre Ch annel switch. The possible used of the equipment for event building in the ATLAS DAQ prototype "-1" has been studied

Service management for multi-domain Active Networks

The Internet is an example of a multi-agent system. In our context, an agent is synonymous with network operators, Internet service providers (ISPs) and content providers. ISPs mutually interact for connectivity's sake, but the fact remains that two peering agents are inevitably self-interested. Egoistic behaviour manifests itself in two ways. Firstly, the ISPs are able to act in an environment where different ISPs would have different spheres of influence, in the sense that they will have control and management responsibilities over different parts of the environment. On the other hand, contention occurs when an ISP intends to sell resources to another, which gives rise to at least two of its customers sharing (hence contending for) a common transport medium. The multi-agent interaction was analysed by simulating a game theoretic approach and the alignment of dominant strategies adopted by agents with evolving traits were abstracted. In particular, the contention for network resources is arbitrated such that a self-policing environment may emerge from a congested bottleneck. Over the past 5 years, larger ISPs have simply peddled as fast as they could to meet the growing demand for bandwidth by throwing bandwidth at congestion problems. Today, the dire financial positions of Worldcom and Global Crossing illustrate, to a certain degree, the fallacies of over-provisioning network resources. The proposed framework in this thesis enables subscribers of an ISP to monitor and police each other's traffic in order to establish a well-behaved norm in utilising limited resources. This framework can be expanded to other inter-domain bottlenecks within the Internet. One of the main objectives of this thesis is also to investigate the impact on multi-domain service management in the future Internet, where active nodes could potentially be located amongst traditional passive routers. The advent of Active Networking technology necessitates node-level computational resource allocations, in addition to prevailing resource reservation approaches for communication bandwidth. Our motivation is to ensure that a service negotiation protocol takes account of these resources so that the response to a specific service deployment request from the end-user is consistent and predictable. To promote the acceleration of service deployment by means of Active Networking technology, a pricing model is also evaluated for computational resources (e.g., CPU time and memory). Previous work in these areas of research only concentrate on bandwidth (i.e., communication) - related resources. Our pricing approach takes account of both guaranteed and best-effort service by adapting the arbitrage theorem from financial theory. The central tenet for our approach is to synthesise insights from different disciplines to address problems in data networks. The greater parts of research experience have been obtained during direct and indirect participation in the 1ST-10561 project known as FAIN (Future Active IP Networks) and ACTS-AC338 project called MIAMI (Mobile Intelligent Agent for Managing the Information Infrastructure). The Inter-domain Manager (IDM) component was integrated as an integral part of the FAIN policy-based network management systems (PBNM). Its monitoring component (developed during the MIAMI project) learns about routing changes that occur within a domain so that the management system and the managed nodes have the same topological view of the network. This enabled our reservation mechanism to reserve resources along the existing route set up by whichever underlying routing protocol is in place

Integration of Mission Control System, On-board Computer Core and spacecraft Simulator for a Satellite Test Bench: Integration of Mission Control System,On-board Computer Core and spacecraft Simulator for a Satellite Test Bench

The satellite avionics platform has been developed in cooperation with Airbus and is called „Future Low-cost Platform“ (FLP). It is based on an Onboard Computer (OBC) with redundant processor boards based on SPARC V8 microchips of type Cobham Aeroflex UT699. At the University of Stuttgart a test bench with a real hardware OBC and a fully simulated satellite is available for testing real flight scenarios with the Onboard Software (OBSW) running on representative hardware. The test bench as later the real flying satellite "Flying Laptop" – is commanded from a real Ground Control Centre (GCC). The main challenges in the FLP project were - Onboard computer design, - Software design and - Interfaces between platform and payloads In the course of industrialization of this FLP platform technology for later use in satellite constellations, Airbus has started to set up an in-house test bench where all the technologies shall be developed. The initial plan is to get first core elements of the FLP OBSW ported to the new dual-core processor and the new Space Wire(SpW) routing network. The plan also has an inclusion of new Mission Control Software with which one can command the OBC. The new OBC has a dual core processor Cobham Gaisler GR712 and hence, all the payload and related functionality are to be implemented only in a second core which involves a lot of low-level task distribution. The consequent SpW router network application and dual-core platform/payload OBSW sharing are entirely new in the field of satellite engineering

Ground equipment for the support of packet telemetry and telecommand

This paper describes ground equipment for packet telemetry and telecommand which has been recently developed by industry for the European Space Agency. The architectural concept for this type of equipment is outlined and the actual implementation is presented. Focus is put on issues related to cross support and telescience as far as they affect the design of the interfaces to the users of the services provided by the equipment and to the management entities in charge of equipment control and monitoring

Supervisión de la Instalación y Montaje de los Sistemas de Comunicaciones Voz, Data, CCTV y CATV con la Tecnología CAT7A en el Nuevo Hospital San Juan de Dios de la Ciudad de Pisco

En este trabajo – informe de experiencia profesional haremos llegar una descripción de los sistemas de comunicación (DATA, VOZ, CCTV Y CATV) instalados en el Hospital San Juan de Dios de la ciudad de Pisco. El sistema consta de una red de Cableado Estructurado Categoría 7A, y de un backbone de Fibra Óptica Multimodo 50/125 um. El Cableado Estructurado que fue implementado fue diseñado conforme a los Estándares ANSI/TIA/EIA e ISO 11801. Estos Estándares definen la estructura del Sistema de Cableado de la siguiente manera: Facilidades de Entrada Cuarto de Equipos Cableado Backbone Cuarto de Telecomunicaciones Cableado Horizontal Área de Trabajo Finalmente se realizará una descripción de las pruebas de certificación de cableado estructurado de fibra óptica y la red de cobre (Cable Categoría 7A). PALABRAS CLAVES Cableado estructurado, fibra óptica, data, voz, cctv y catv

Operational support systems for satellite communications

The role of satellite communications is changing from providing bandwidth linking network operators interconnections towards providing IP enabled communications to end users. This migration from few high-value routes towards many low-value routes means that integration and automation of processes with terrestrial networks becomes critical in driving down unit costs. Integration and automation is necessary on all planes: user, control and management. In satellite communications, management aspects, underpinned by Operational Support Systems (OSS) have received the least research attention, making this a valuable topic for study. In most areas, OSS for satellite systems are similar to other domains. However there are some notable areas of difference which have been the focus of this research. The eTOM business framework, developed by the TMF, has been used to highlight aspects of OSS unique to satellite. Since satellite capacity represents the highest operational cost of a satellite route, effective management while minimising the overhead traffic is critical. The transmission of IP packets is assumed and the real-time measurement of QoS parameters such as packet delay and loss emerged as the most important differences. A number of approaches to QoS measurement are feasible, however the use of trace packets is most promising especially for high network loads. An experiment compares the results from simulations, mathematical models and from a test network, using Poisson and self-similar traffic flows. The relationship between measurement accuracy and trace packet intensity is explored and the measurement response time to steps in traffic load is estimated. It is discovered that measurement accuracy improves as the queue load increases, in contrast to alternative approaches such as sampling of user packets. The response time to steps depends upon the degree of self-similarity and is generally longer than the times recommended by standards. A pragmatic approach to management of different modes is proposed where the measurement method is changed depending on the load

Individual Professional Practice in the Company

Bakalářská práce shrnuje absolvování individuální odborné praxe ve společnosti Pramet Tools, s.r.o. na oddělení informatiky na pozici síťového správce. Mým úkolem bude řešit každodenní problémy a požadavky uživatelů, řešit problémy vzniklé expanzí počítačové sítě. Jako hlavní dlouhodobý předmět práce jsem dostal výběr a následnou implementaci systému pro monitorování a hlášení chyb komplexní výpočetní a komunikační infrastruktury podniku. K hlavnímu úkolu praxe chci, díky jeho obsáhlosti, přistupovat systematicky a řešení rozdělit do několika etap: seznámení s místní síťovou infrastrukturou, průzkum dostupných monitorovacích systémů, výběr systému, implementace systému, test základní funkcionality, přidání monitorovaných zařízení, grafické zobrazení měřených veličin, měření a vyhodnocení zatížení sítě a prostředků vzniklé přidáním monitorovacího systému. Jako výsledek mé práce by měl vzniknout robustní, komplexní a centrální monitorovací systém, který bude spuštěný jako služba na serveru a který nahradí stávající separátní monitorovací aplikace. Systém bude schopný informovat administrátora o vzniklém problému.The bachelor thesis summarizes the completion of individual professional practice in Pramet Tools, s.r.o. in the IT department as a computer network administrator. My task will be to solve everyday problems and user requirements, to solve the problems caused by the expansion of the computer network. The main long-term subject of my thesis is to select and implement the system for monitoring and reporting errors of complex computing and communication infrastructure of the company. I want to separate the main task into several stages: to discover local network infrastructure, survey available monitoring systems, system selection, system implementation, basic functionality test, addition of monitored devices, graphical representation of measured values, measurement and assessing the network load and resources generated by adding a monitoring system. As a result of my work, a robust, comprehensive and central monitoring system should be created, which will run as a service on the server and replace the existing separate monitoring applications. The system will be able to inform the administrator of a problem.440 - Katedra telekomunikační technikyvýborn

Diseño De Red De Comunicación De Datos Para La Institución Educativa Privada Emilio Soyer Cabero Ubicado En El Distrito De Chorrillos, Lima, Perú

El presente trabajo de investigación lleva por título “DISEÑO DE RED DE COMUNICACIÓN DE DATOS PARA LA INSTITUCIÓN EDUCATIVA PRIVADA EMILIO SOYER CABERO UBICADA EN EL DISTRITO DE CHORRILLOS, LIMA, PERÚ”, para optar el título de Ingeniero Electrónico y Telecomunicaciones, presentado por el alumno Jhaset Raúl Ortega Cubas. En primer lugar se aborda la realidad problemática observada relacionada con la importancia y necesidad de diseñar una Red de Comunicación de Datos con el fin de dotar a la Institución Educativa Privada Emilio Soyer Cabero de un sistema de transmisión de información mediante la comunicación de todos los dispositivos de red que ésta maneje para ventaja de los trabajadores, docentes y alumnos. La estructura que hemos seguido en este proyecto se compone de 3 capítulos. El primer capítulo comprende el planteamiento del problema, el segundo capítulo el desarrollo del marco teórico y el tercer capítulo corresponde al desarrollo del diseño