×

Process for the management of concurrent access and device for practicing the same

  • US 5,936,540 A
  • Filed: 12/13/1996
  • Issued: 08/10/1999
  • Est. Priority Date: 12/13/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. Process for the management of concurrent access between a master emitter/reader device (1) and plural receiver/transmitter slave devices (2) entering successively into or remaining in the field of action of the master device adapted to guarantee the bidirectional transmission of data between the master device and each of the slave devices present, in a coherent manner, comprising the steps of:

  • a. Emission by the master device (1) at a predetermined frequency of a heading (5) whose structure comprises at least two temporary address values, NEXT (N) and ACTU (A) of which the value is different;

    b. Entry of a slave device (2) into the field of action of the master device (1) and actuation of this latter;

    c. Reception by the slave device (2) of the heading emitted at step a., decoding and saving the value of NEXT in an internal register;

    d. Emission of an acknowledgement of reception by the slave device to the master device;

    e. Counting up the value of NEXT (N) by the master device (1) upon reception of the acknowledgement of inscription;

    f. Emission by the master device (1) of a screen by utilizing the value of ACTU (A) at a corresponding value to an inscribed slave device and to which a command is directed;

    g. Comparison by the slave device of the transmitted value ACTU (A) to that saved in its register and decoding and executing the command only in case of equality of these values; and

    h. Repetition of steps a. to f. until the emission of an end of dialogue command by the master device (1).

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