Multiplex communications – Wide area network – Packet switching
Patent
1980-03-07
1982-05-25
Britton, Howard
Multiplex communications
Wide area network
Packet switching
370104, H04J 316, H04Q 1104
Patent
active
043320260
ABSTRACT:
A multiple data rate digital switch for a TDMA communications controller is disclosed which can service a plurality of input/output ports having many different data rates on a time divided basis, either between ports connected to the same controller or between ports connected to different, geographically remote controllers. A transmit burst buffer and a receive burst buffer are connected between the local ports and a TDMA communication link and an intranodal buffer is connected between local ports. All three buffers are accessed by a switch control memory which stores n.sub.i control words for each of the ports which are scanned m times per TDMA frame, there being a frame rate of f frames per second. Thus, the ports are selected and their data is buffered at a rate R.sub.i which is equal to the product of n.sub.i times m times f. In this manner, ports having a variety of data rates can be serviced on a time interleaved basis with maximum connectivity.
REFERENCES:
patent: 3825899 (1974-07-01), Haeberle
patent: 4168401 (1979-09-01), Molleron
patent: 4206322 (1980-06-01), Lurtz
Alvarez, III Joseph A.
Brennen John F.
Krug Robert W.
Britton Howard
Hoel John E.
IBM Corporation
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