Mechanism for arbitrating client access to a networked print ser

Details Mechanism for arbitrating client access to a networked print ser Mechanism for arbitrating client access to a networked print ser

1988-01-29

1991-05-07

Clark, David L.

Boots, shoes, and leggings

364900, G06F 312

Patent

active

050142216

ABSTRACT:
In response to a print request, a print server returns a "window" message which specifies an amount of data that the process is permitted to send to the print server. The amount of data can be zero, indicating that the printer is not available. In this case the print server queues the print request, and when the printer becomes available to service the queued request, the queued request is removed from the queue and a "window" message indicating that the printer is available is sent to the requesting device. In response, the requesting device transmits a packet of data to be printed including the amount of data specified by the window message, and the requesting device waits for an acknowledgement of the print data packet. When the printer finishes printing the data, the print server acknowledges receipt of the data packet, and repeats the window message. This procedure is repeated until the printer has printed all of the data that the requesting device would like to have printed. Then, the requesting device terminates the connection by sending a termination request, which the print server acknowledges. Finally, the requesting device returns the acknowledgement.

REFERENCES:
patent: 3593300 (1971-07-01), Driscoll et al.
patent: 3614745 (1971-10-01), Podvin et al.
patent: 4273041 (1981-06-01), Boleavage et al.
patent: 4466065 (1984-08-01), Advani et al.
patent: 4536874 (1985-08-01), Stoffel et al.
patent: 4556959 (1985-12-01), Allen et al.
patent: 4633245 (1986-12-01), Blount et al.
patent: 4658351 (1987-04-01), Teng

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