×

Adjusting data transmission rate based on received signal quality

  • US 4,606,044 A
  • Filed: 03/05/1984
  • Issued: 08/12/1986
  • Est. Priority Date: 03/09/1983
  • Status: Expired due to Term
First Claim
Patent Images

1. A data transmission control method for allowing remote transceiver stations to transmit data via an analog transmission line through modems which selectively use a plurality of transmission rates, said method comprising the steps of:

  • (a) transmitting test training data comprised of data bursts in phase modulated form including a plurality of vectors transmitted at a plurality of data rates from a transmit station to a receive station;

    (b) training a modem of said receive station in response to said test training data;

    (c) selecting a transmission rate adequate for communication between the transmit and receive stations by measuring deviation of the vectors of the test training data received by the receive station from ideal predetermined values, said measuring having a degree of accuracy which is sufficient to discriminate among the deviations of test training data vectors which are all closer to the same ideal predetermined value than to any other ideal predetermined value;

    (d) notifying said selected transmission rate from the receive station to the transmit station; and

    (e) transmitting data from the transmit station at said notified transmission rate.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×