System for preventing cell dropout on the transmitting side using timing signal and read completion signal to control the retransmission of previous cell
First Claim
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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Abstract
A cell dropout preventing system includes a memory for temporarily storing cells which are obtained by dividing transmitting data into cells having a fixed length, an address generating part for generating a read address signal of the memory, a controlling part for controlling the address generating part based on a timing signal received from a line side and for transmitting to the line side the cell read from the memory by the read address signal generated from the address generating part, and a read completion detecting part for outputting a detection signal when it is detected that one cell is read completely from the memory. The controlling part controls the address generating part so that a cell which is the same as a previous cell is read from the memory and transmitted to the line side when no detection signal is received from the read completion detecting part.
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Citations
8 Claims
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1. A cell dropout preventing system for use in a switched network at a transmitting side, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification