Multiplex communications – Wide area network – Packet switching
Patent
1990-07-03
1992-06-02
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
370 941, H04J 324, H04Q 1104
Patent
active
051193698
ABSTRACT:
In a packet network which includes a plurality of packet switching stations and in which a packet including in its header portion a VPI (Virtual Path Indentifier) for identifying one of logical paths multipliexed on a transmission line and a VCI (Virtual Connection Identifier) for identifying one of logical connections multiplexed on one logical path is communicated between the switching stations, each switching station preliminarily designates a VCI to be given to a packet directed to that station when a logical connection is to be set up between that station and another station. When receiving an information packet from the other station, the each station makes access to header label conversion tables on the basis of a VCI included in the received packet to read internal routing information necessary for a packet switching operation and a VCI to be given to a packet to be delivered.
REFERENCES:
patent: 4494230 (1985-01-01), Turner
patent: 4884263 (1989-11-01), Suzuki
patent: 4890280 (1989-12-01), Hirata
patent: 4907220 (1990-03-01), Rau et al.
patent: 4920531 (1990-04-01), Isono et al.
patent: 4964119 (1990-10-01), Endo et al.
Gohara Shinobu
Kawakita Kenji
Tanabe Shirou
Hitachi , Ltd.
Kizou H.
Safourek Benedict V.
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