Communications system between lan's of different types

Details Communications system between lan's of different types Communications system between lan's of different types

H - Electricity

04

L

H04L 12/42 (2006.01) H04L 12/46 (2006.01) H04L 12/66 (2006.01)

Patent

CA 2048685

A communications system between LANs (Local Area Network's) of different types constituted of a backbone LAN (1) and a plurality of branch LANs (7,7') connected to said backbone LAN (1) through a node (2A, 2B, 2C, 2D). A branch LAN frame (30) delivered from a terminal (8, 9, 10, 15, 18, 21) is incorporated into a backbone LAN frame (40) in the node (2A, 2B, 2C, 2D), and in response to the incorporation, the address of the adjoining node on the downstream side of its own node is given to the backbone LAN frame (40), and thus, the backbone LAN frame (40) is transmitted through the backbone LAN (1). Each node (2A, 2B, 2C, 2D), when the address in the backbone LAN frame (40) agrees with its own address, separates the branch LAN frame (30) from the backbone LAN frame (40). - 53 -

Système de communication entre des réseaux locaux (LAN) de différents types, constitué d'un LAN principal (1) et d'un certain nombre de LAN secondaires (7,7') connectés audit LAN principal (1) au moyen d'un noeud (2A, 2B, 2C, 2D). Une trame de LAN secondaire (30) transmise à partir d'un terminal (8, 9, 10, 15, 18, 21) est incorporée à une trame du LAN principal à l'intérieur du noeud (2A, 2B, 2C, 2D); l'adresse du noeud voisin en aval est alors communiquée à la trame du LAN principal (40), et ainsi, la trame du LAN principal (40) est transmise au moyen du LAN principal (1). Lorsque l'adresse contenue dans la trame du LAN principal correspond à la sienne, chaque noeud (2A, 2B, 2C, 2D) sépare la trame du LAN secondaire (30) de la trame du LAN principal (40). -53-

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