Flow control method

Details Flow control method Flow control method

1994-08-22

1996-07-23

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 60, H04L 1256

Patent

active

055397476

ABSTRACT:
A flow control device constructed at a switch device for connecting a plurality of ring networks for exchanging data of a cell among the ring networks. A user device for transmitting a cell carrying data is connected to each ring network, and it can transmit cells within a window counter number. Such flow control device comprises a buffer monitoring unit for monitoring the number of data in an output buffer, a regulation judging unit for comparing the number of data in each buffer with a first threshold value representing state of the buffer which is in danger of overflow, with a second threshold value representing state of the buffer which is not in danger of overflow, and outputting a regulation notice when the data number is grater than the first threshold value while outputting a regulation notice when the data number is smaller than the second threshold value, and a plurality of traffic controlling units for transmitting to the respective ring network a reset cell at a first interval when no regulation notice is received or the release notice is received while transmitting a reset cell at a second interval which is longer than the first interval when the regulation notice is received.

REFERENCES:
patent: 4955016 (1990-09-01), Eng et al.
Evaluation of GFC Protocol at the ATM-UNI, 1992 (with Partial Translation), pp. 1-7, Morita et al.

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