
The operator Finnish Digita selects Nevion for the renewal of its network DVB-T Los procesadores Nevion CP4400 y el software de gesti n VideoIPath aseguran un transporte de se al fiable sobre IP.
The Finnish digital terrestrial television operator Digita has selected the solutions of Nevion para la renovaci n de la red de DVB-T pasando a transportar se ales a trav s de SDH, microondas e IP. El proyecto, dise ado para lograr rentabilidad y facilitar la regionalizaci n, requer a una soluci n que garantizara el transporte fiable de se ales sobre IP.
La soluci n consiste en los procesadores para TDT Nevion Virtuoso CP4400 desplegados en la cabecera y en los 40 sitios de transmisi n. Todos los procesadores est n gestionados por el software de gesti n VideoIPath de Nevion, que Digita ya utiliza para orquestar su red de contribuci n.
En la cabecera, los CP4400 preparan la transmisi n multiplexada para 22 regiones y proporcionan la adaptaci n T2-MI e IP, as como m ltiples mecanismos de protecci n, incluyendo la correcci n de errores FEC (forward error correction) para la recuperaci n de p rdida de paquetes, SIPS (streaming intelligent packet switching) para transmisi n dual y LDO (launch delay offset) para la transmisi n dual en una sola v a. Algunos procesadores Nevion Virtuoso CP4400 tambi n proporcionan la conmutaci n continua entre los flujos redundantes de SFN.
Workflow
En cada sitio de transmisi n, los procesadores de Nevion reciben los flujos protegidos y realizan una conversi n de IP a ASI, lista para la transmisi n lo que permite la reutilizaci n de los transmisores de primera generaci n. Adem s de los flujos duales recibidos a trav s de la red IP, los procesadores tambi n reciben una se al RF de los sitios de transmisi n cercanos. Esto proporciona un nivel adicional de protecci n en caso de que el enlace IP falle completamente. Es de destacar que los equipos de Nevion pueden conmutar autom ticamente a la se al RF.
Toda la infraestructura es totalmente redundante para garantizar la m xima fiabilidad y gestionarse y supervisarse centralmente a trav s del software de gesti n de VideoIPath de Nevion. En particular, VideoIPath permite a Digita desplegar remotamente las actualizaciones de software a los CP4400 de forma planificada y organizada, sin interrumpir nunca la transmisi n.
Markus Ala-Hautala, director de operaciones de Digita, destaca que por ejemplo, gracias a la densidad y funcionalidad de la soluci n Nevion Virtuoso CP4400, pudimos alcanzar nuestros objetivos en la cabecera con menos equipamiento de lo que hubiera sido normalmente necesario. En t rminos de tiempos, logramos una mayor rapidez de lo que ser a habitual en un proyecto de TDT, pero Nevion tiene un excelente historial de entrega r pida .
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