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System for preventing cell dropout on the transmitting side using timing signal and read completion signal to control the retransmission of previous cell

  • US 5,684,958 A
  • Filed: 10/07/1996
  • Issued: 11/04/1997
  • Est. Priority Date: 09/01/1993
  • Status: Expired due to Fees
First Claim
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1. A cell dropout preventing system for use in a switched network at a transmitting side, comprising:

  • memory means for temporarily storing cells which are obtained by dividing transmitting data into cells having a fixed length;

    address generating means, coupled to said memory means, for generating a read address signal of said memory means;

    controlling means, coupled to said memory means and said address generating means, for controlling said address generating means based on a timing signal received by said controlling means from a line side, and for transmitting to said line side a cell read from said memory means by the read address signal generated from said address generating means; and

    read completion detecting means, coupled to said address generating means and said controlling means, for outputting a detection signal to said controlling means when said read completion detecting means detects that one cell is read completely from said memory means,said controlling means controlling said address generating means so that a cell which is the same as a previously read cell is read from said memory means and is transmitted to the line side when no detection signal is received from said read completion detecting means, wherein the memory means, the address generating means, the controlling means, the read completion detecting means, and the controlling means are located at the transmitting side of the cell dropout preventing system.

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