Statistical multiplexing system for computer communications

Details Statistical multiplexing system for computer communications Statistical multiplexing system for computer communications

1977-02-22

1978-04-04

Stewart, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

179 15BW, 3401461BA, H04J 600

Patent

active

040829227

ABSTRACT:
A statistical multiplexing system is provided which includes two microprocessors with independent local memories, the microprocessors being designated as the "send microprocessor" and the "receive microprocessor," respectively. Communication between the two microprocessors is provided by an interprocess communication facility which comprises a first-in-first-out memory, and such communication is initiated by interrupt signals to the respective microprocessors. The send microprocessor assembles characters from different terminals, echos characters back to the different terminals in accordance with a local echoing function, collects characters from the same terminal into data sub-blocks with block time-out interrupts, multiplexes the data sub-blocks, forms the data sub-blocks into data blocks and transmits the data blocks to remote stations according to data destination addresses in the data blocks. The receive microprocessor handles received multiplexed data blocks and initiates positive and negative acknowledgment signals; and it then demultiplexes the correctly received multiplexed data blocks and passes them on to the appropriate output terminals.

REFERENCES:
patent: 3680045 (1972-07-01), Meidan
patent: 3729713 (1973-04-01), Irwin
patent: 3979719 (1976-09-01), Tooley
patent: 3997729 (1976-12-01), Costales

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