Atm communications equipment

Details Atm communications equipment Atm communications equipment

H - Electricity

04

L

H04L 12/56 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2178556

The ATM communications equipment unit comprises at its terminals input-side and output-side multiplex equipment units designed for a statistical multiplexing of message cells. Input queues, which can be individually allocated to the output-side multiplex equipment unit, are controlled in the input-side multiplex equipment unit for storing message cells to be transmitted. In addition, indications concerning the current usage of the bandwidth available at the respective terminal are respectively retained in these input-side and output- side multiplex equipment units. For the transmission of message cells from an input-side multiplex equipment unit to an allocated output-side multiplex equipment unit, a flow control is carried out such that a request message is respectively transmitted by the input-side multiplex equipment to the output-side multiplex equipment unit for a request of a determined bandwidth. If no free bandwidth is currently available at the output side, the individual request messages are inserted into a request queue that is processed as bandwidth becomes free. As bandwidth becomes free, a determined bandwidth is offered to the respective input-side multiplex equipment unit by means of an offer message. This offer message is acknowledged with an indication of the actually required bandwidth.

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