An ATM transmission system with a variable transmission rate

Claim 2

The ATM variable rate transmission system as set forth in claim 1, wherein the number of transmitted cells is decreased according to a frequency of the occurrence of discarded cells based on said discard cell information provided by said receiving terminal when the cell discard occurs more than predetermined times.

Claim 3

The ATM variable rate transmission system as set forth in claim 1, wherein the number of transmitted cells is decreased according to a frequency of the occurrence of discarded cells based on said discard cell information provided by said receiving terminal when the cell discard occurs less than predetermined times.

Claim 4

The ATM variable rate transmission system as set forth in claim 1, wherein the minimum and maximum values of the cell transmission rate can be determined to any value within a limited variable range .

Claim 5

An ATM transmission system wherein said cell discard detecting means comprising: a counter means for updating a count using a clock obtained from the cell sending rate, thereby producing a time stamp period signal, a controlling means for controlling the restart of a read clock by setting a no-discard signal provided by said discard detecting means to NO by confirming the value matching among: a time stamp comparing means for generating a discard indicating signal by comparing the time stamp period signal with said time stamp read from said buffer means, means for stopping a read clock of said buffer means when said discard indicating signal indicates the occurrence of a discard.

Claim 6

An ATM transmission unit according to claim 1, wherein a cell discard is detected and a cell transmission rate is controlled in a receiving route as well as in a transmission route, thereby forming two-way transmission system.

Claim 7

An ATM transmission system according to claim 1, wherein only a requested cell sending rate CR signal is provided in a receiving line, thereby forming oneway transmission system.

Claim 8

An ATM image transmission system according to claim 1, wherein the amount of data produced from a codec is increased or decreased according to the cell transmission rate where time-sequential information of voice and images are transmitted through the ATM transmission line.

Claim 9

An ATM system for transmitting cell information from a transmitting side to a receiving side through a two-way ATM transmission line, said system comprising: a multiplexing section provided in said transmitting side sending a cell comprising cell sending rate, requested cell sending rate discard, time stamp and data, to said receiving side through said ATM transmission line, a demultiplexing means provided in said receiving side for separating cells received from said two-way ATM transmission line, cell discard detecting means for detecting a discarded cell from the time stamp for defining the cell sending sequence, and generating discarded cell information, means for transmitting the requested cell sending rate determined based on the cell sending rate and discarded cell information, cell sending rate determining means for determining a cell sending rate and an encoding rate according to said requested cell sending rate received from said receiving side, and a variable rate encoder for encoding data to be sent to said multiplexing means according to said encoding rate.

Claim 10

An ATM transmission system for transmitting cell information from a transmitting side to a receiving side through a two-way ATM transmission line, said system comprising: a demultiplexing means provided in said receiving side for isolating cells received from said two-way ATM transmission line, cell discard detecting means for detecting a discarded cell from a time stamp for defining the cell sending sequence, and generating discarded cell information, a multiplexing section provided in said transmitting side comprising a cell of said discarded cell information, said sending time stamp and data, and for sending said cell to said receiving side through said asynchronous transmission line, encoding rate determining means for determining an encoding rate by said discarded cell information received from said receiving side, a variable rate encoder for encoding data to be sent to said multiplexing means according to said encoding rate, time series processing means for inserting a dummy cell into said discarded cell to absorb a time difference caused by said discarded cell when said discarded cell detecting section detects a cell discarded from received data, and a variable rate decoder for decoding received data after adjusting said time difference.

Claim 11

An ATM transmission system provided on its transmitting side: an encoding section for encoding an analog data signal to a digital data signal, a multiplexing means for multiplexing digital data, a cell transmission rate, a requested cell transmission rate obtained from the frequency of cell discard, and a time stamp based on a cell format, a transmitting means for transmitting multiplexed cells to an ATM transmission network according to a timing signal generated by said cell transmission rate CS which is determined based on said requested cell transmission rate.

Claim 12

An ATM transmission system provided on its receiving side: a receiving means for receiving a cell, a demultiplexing means for separating said cell into cell sending rate CS, a requested cell transmission sending rate CR, a time stamp TS, and data, according to a cell format of a received cell, a buffer means for storing a time stamp TS and data according to a write clock, a decoder for reading data from said buffer and decoding said data from said data by said cell sending rate, a controlling means for generating said requested cell transmission rate CR to be sent to an opposite terminal based on the frequency of the cell discard detected by a comparison with said time stamp TS read from said buffer.