H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
344/28
H04Q 3/42 (2006.01) H04J 3/24 (2006.01) H04L 12/56 (2006.01) H04Q 3/47 (2006.01)
Patent
CA 2000811
ABSTRACT A label switching and control interface for asynchronous fast packet switching consisting of a set of label switching and cell processing units controlled by a control unit; the units operate at each multiplex level in real time through using microprogrammed logic requiring control processor intervention only at connection set-up and release. The units implement low level flow control algorithms to exploit the advantages of this configuration. A label becomes indicative of a virtual circuit which is allotted only locally to a cell, thus removing the necessity for very complex labels, while the parameters which characterize the connection which uses a particular label are stored in the unit itself. Each unit switches the label characterizing the connection at the node input multiplex with the label characterizing it at the output multiplex. At the same time it associates, with each cell, the information necessary for multiplex switching which is then carried out in a self-routing network; the cells processed in this way by each unit of the set are statistically multiplexed asynchronously and sent to a connection network termination. This termination in turn serves other asynchronous multiplexes, which can operate at different frequencies. Label switching units do not have their own operating frequency, but automatically assume that of the asynchronous multiplexer to which they are connected.
Demichelis Carlo
Mattone Paolo
Zapplorto Alessandro
Cselt - Centro Studi E. Laboratori Telecommunicazioni S.p.a.
Ridout & Maybee Llp
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