Method for handling redundant switching planes in packet switche

Details Method for handling redundant switching planes in packet switche Method for handling redundant switching planes in packet switche

1995-02-15

1996-01-16

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 601, 340827, H04L 1256

Patent

active

054854539

ABSTRACT:
A switch for the transfer of data packets comprises in the conventional way input ports and output ports and parallel switching planes, which are identical to each other. The switch establishes connections between input ports and output ports through the parallel switching planes. In each output port there is for each switching plane and each established connection a buffer accommodating at least one data packet. In the output port there is in addition a logical selection device for selecting data packets from the switch and from the different planes in such a way, that a data packet stream, which is as correct as possible, is obtained from the output port, and it selects in the first place data packets from a switching plane, which is the preferred plane at each instant. The selection device comprises a quality determining unit, which at each occasion determines the preferred plane by means of quality values for each plane. These quality values are determined by means of an evaluation of earlier data packets, which have arrived to the output port.

REFERENCES:
patent: 5153578 (1992-10-01), Izawa et al.
patent: 5200950 (1993-04-01), Foglas et al.
patent: 5301184 (1994-04-01), Uriu et al.

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