Process and device for high speed polling

Details Process and device for high speed polling Process and device for high speed polling

1989-06-26

1990-07-17

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

34082508, H04J 324

Patent

active

049425722

ABSTRACT:
A process is disclosed for efficiently polling low rate data terminals attached to communicate with a central station via a high speed channel. The process is based on the use of a dual rate polling mechanism involving first polling by using a high rate pseudo random sequence; monitoring the messages received back from the terminals; checking said messages for validity, and upon detecting an invalid message possibly indicating collision between terminal messages, then switching back into the first generated sequence at a lower conventional rate.

REFERENCES:
patent: 3755781 (1973-08-01), Haas et al.
patent: 3755782 (1973-08-01), Haas et al.
patent: 4000378 (1976-12-01), Caplan
patent: 4340961 (1982-07-01), Capel et al.
patent: 4638313 (1987-01-01), Sherwood, Jr. et al.
patent: 4667193 (1987-05-01), Cotie et al.
patent: 4742335 (1988-05-01), Vogt

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