Multiplex communications – Wide area network – Packet switching
Patent
1993-08-24
1996-04-30
Kim, Ken S.
Multiplex communications
Wide area network
Packet switching
370 601, 39518315, 39520011, 39520012, 39520013, 39520001, G06F 15173
Patent
active
055133215
ABSTRACT:
A multiprocessor system containing a networking apparatus and a plurality of processors for transferring data through the networking apparatus from one to another of the plurality of processors. At least one receiving-side processor transmits a transfer allowance signal to the networking apparatus when the processor is ready to receive data, and transmits an on-line/off-line signal to the networking apparatus, where the on-line/off-line signal indicates whether the second processor is in an on-line state or off-line state. The networking apparatus includes a data transfer control unit, provided on each route for transferring data, for receiving data transferred from one of transmitting-side processors, temporarily storing the data, and transferring the data to one of the receiving-side processor when the data transfer control unit receives the transfer allowance signal from the second processor; and an off-line state detecting unit for outputting a data discharge control signal to the data transfer control unit when the on-line/off-line signal indicates that the second processor is in the off-line state. The data transfer control unit further contains a data discharge unit for discharging the data temporarily stored in the data transfer control unit in response to the data discharge control signal, regardless of the transfer allowance signal.
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Fujitsu Limited
Kim Ken S.
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