Multiplex communications – Wide area network – Packet switching
Patent
1989-01-13
1990-07-03
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 942, 370 4, H04J 326
Patent
active
049397214
ABSTRACT:
A node for a fast packet-switching network in optical-electrical technology comprises an optical switching matrix and electrical control equipment which processes the signalling and the information packet headers. More particularly, the control equipment updates the label and, depending on such a label, searches for the routing through the node. A centralized node controller processes the signalling, while a distributed processing system processes the packet headers and routes the packets through the network. For all communications in progress, the distributed processing system periodically forwards routing requests to an electrical self-routing switching matrix associated with the optical matrix. When a connection path has been found between an input and an output of the electrical matrix, the same path is reproduced in the optical matrix and the packets are transferred to the node output through the optical matrix.
REFERENCES:
patent: 4397016 (1983-08-01), Broussaud
patent: 4696059 (1987-09-01), MacDonald et al.
patent: 4731878 (1988-03-01), Vaidya
patent: 4736462 (1988-04-01), Joel, Jr.
patent: 4829512 (1989-05-01), Nakai et al.
patent: 4837855 (1989-06-01), Hajikano et al.
CSELT - Centro Studi e Laboratori Telecommunicazioni SpA
Dubno Herbert
Jung Min
Olms Douglas W.
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