Multiplex communications – Wide area network – Packet switching
Patent
1991-12-12
1994-03-29
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 61, H04L 1256
Patent
active
052991911
ABSTRACT:
The invention is a method of controlling asynchronous time-division communications. Cells received from an in-coming time division multiplex system are delivered to an out-going asynchronous time division multiplex system. Each in-coming cell is stored in a buffer memory at an address that corresponds to its re-sending time. At the time when the next cell of a particular communication arrives, the number of previously stored cells for that particular communication, that are stored in the buffer memory, is compared with a maximal number assigned to the particular communication. If the first number exceeds the second number, the next in-coming cell is not re-sent. Besides the buffer memory, the system includes a status memory and an arithmetic and logic unit. The status memory is divided into zones, each zone having two sections. When the next cell is received, a first number of cells stored in the first section of the particular communication which were stored in the buffer memory and which have not yet been sent, is compared with the maximal number stored in the second zone. The arithmetic and logic unit makes the comparison and inhibits the re-sending of the next in-coming cell, if the first number exceeds the maximal number.
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J. Bauwens and T. Van Landegem, "Architecture of the Local Exchange in the Belgian Broadband Experiment", Revue HF, vol. 14, No. 5/6, Nov. 1989, Ophain Be, pp. 155-164.
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Boyer Pierre
Rouaud Yvon
Servel Michel
Marcelo Melvin
Olms Douglas W.
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