Utilización de arquitecturas multiprocesadoras para la nueva red de teleinformática de la SNCF

• Jean Pierre Duthoit ^[1]
  1. [1] Société Nationale des Chemins de Fer (SNCF)
• Localización: Revista A.I.T., ISSN 0378-3294, Nº. 41, 1981 (Ejemplar dedicado a: Simposio ORE sobre microprocesadores, 2ª parte), págs. 20-28
• Idioma: español
• Títulos paralelos:
  • Use of multiprocessing architecture for the new teleinformatique network of the SNCF
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• Resumen

  • The new Railway Teleinformatique Network (RETIF) which is realized by SNCF is constituted for a packets commutation rack destined to secure the transport functions of the information and for a distribution network of the information towards the terminals.

    The commutation network is constituted for commutes material elements of packets interconnected (CP) and transmission lines, and form programs implanted in the CP and in the computers connected to the CP (terminal and central or frontal computers) directly. It secure a transport service in packets of information took for a virtual circuit.

    The interchange procedures and the protocols of guiding of packets are agree with the X25 communique of the CCITT (Telegraphic and Telephonic International Consultative Committee).

    The distribution network is constituted for material and logical elements called connection units (UR), joined to the CP directly, which have for mission the physical and logical connection of the terminals. By the way, the group of functions associated to its management. It is secured the CP and the UR are reliable computers; the cost, safety, flexibility, exploitation facility and extension possibilities criterions, have orientated the selection of the SNCF to multicroprocessing architecture more than to classic solutions supported on minicomputers.

    Two choices are fundamental in the definition of a multiprocessing architecture: the functional distribution; assignment of a treatment to each microprocessing and the intermicroprocessing dialogue. The architectures of the CP and the UR are the best that satisfy each one of these criterions.