Multiplex communications – Wide area network – Packet switching
Patent
1992-02-12
1994-03-15
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 60, 370 941, H04L 1256, H04Q 1104
Patent
active
052951375
ABSTRACT:
A packet switch with a plurality of processing modules (PMs) interconnected via a shared transmission medium is provided with a flat distributed architecture by which each of the PMs has the capability of exclusive control of establishing a path for a user connection through the switch when a call request (CR) packet is received at one of its input transmission lines to the switch, and in which the exclusive control is exercised by selecting the best available line among all of the output transmission lines from the switch whether that output transmission line is one of its own or one of those of another PM in the switch, so that the path for the user call connection through the switch established in response to a given CR packet at any given time is a single hop via the shared transmission medium between the source PM which established the path and the destination PM which has the selected output transmission line, except where a single PM is both the source and the destination PM because its own output transmission line is selected as the best currently available choice. Virtual trunk lines are generated internally of the switch and used for high speed switching and inter-PM communication, but not in the routing algorithm of CR packet processing.
REFERENCES:
patent: 4331834 (1982-05-01), Ganz et al.
patent: 4592048 (1986-05-01), Beckner et al.
patent: 4713806 (1987-12-01), Oberlander et al.
patent: 5040171 (1991-08-01), Osaki
patent: 5042027 (1991-08-01), Takase et al.
Hsu Alpus H.
Olms Douglas W.
Sprint International Communications Corp.
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