ATM communication system with interrogation of output port serve

Details ATM communication system with interrogation of output port serve ATM communication system with interrogation of output port serve

1994-05-02

1995-09-05

Hsu, Alpus

Multiplex communications

Wide area network

Packet switching

370 61, 370 942, 370118, H04L 1256

Patent

active

054485592

ABSTRACT:
An ATM communication system has an ATM switch having a plurality of input ports and a plurality of output ports, each of the input ports being fed from an input port server and each of the output ports being arranged to feed an output port server. The input port servers each have a plurality of buffer stores, one for each of the output ports to which output port data is transmitted through the switch. Each buffer store in the input port servers is arranged to interrogate the output port server with which it communicates by a bandwidth request before the transmission of data. This determines whether output port server data handling capacity is available, whereby ATM switch operation during periods of peak traffic is facilitated. The system includes a queuing arrangement for bandwidth requests received during periods when there is no available bandwidth capacity, the arrangement being such that requests are released in a predetermined order when capacity becomes available.

REFERENCES:
patent: 5128931 (1992-07-01), Yamanaka et al.
patent: 5179556 (1993-01-01), Turner
patent: 5285445 (1994-02-01), Lehnert et al.
patent: 5291481 (1994-03-01), Doshi et al.
patent: 5303078 (1994-04-01), Brackett et al.
"Token Ring Access Method and Physical Layer Specifications", IEEE 802.5, 1989, pp. 31-39.

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