JP2884894B2 - ATM terminal equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ATM terminal device, and more particularly to a supercomputer, a high-speed mainframe, a disk array, a high-speed workstation and the like.
The present invention relates to an ATM terminal device for transferring burst data which is connected and networked by a TM switch network.

[0002]

2. Description of the Related Art A conventional ATM terminal device includes a transmitting terminal for outputting a data transmission request signal and burst data, and a receiving terminal for outputting a transmission permission signal and receiving burst data when receiving a data transmission request signal. , The data transmission request signal and the burst data from the transmitting terminal are converted to cells and transmitted to the ATM network, and
A transmitting adapter for restoring a cellized transmission permission signal received from a network and outputting the signal to a transmitting terminal;
And a receiving adapter for restoring a data transmission request signal and burst data from the network and outputting the burst data to the receiving terminal, and for converting the transmission permission signal from the receiving terminal into cells and transmitting the signal to the ATM network. .

The operation of the above conventional example will be described with reference to a timing chart of FIG. However, a case where the receiving side has three types of buffers will be described as an example.

The transmitting terminal outputs a data transmission request signal to the transmitting adapter ((1) in FIG. 3).

[0005] The transmitting adapter converts the data transmission request signal from the transmitting terminal into a cell and outputs the cell to the ATM network ((2) in FIG. 3).

[0006] In the ATM network, the cellized data transmission request signal is input to the receiving adapter via a previously routed path ((3) in FIG. 3).

The receiving adapter restores the cellized data transmission request signal received from the ATM network and outputs it to the receiving terminal ((4) in FIG. 3).

When the receiving terminal receives the data transmission request signal from the receiving adapter, it secures a built-in receiving buffer and outputs a transmission permission signal to the first buffer to the receiving adapter (see (5) in FIG. 3). )).

The receiving adapter converts the transmission permission signal into a cell and outputs the cell to the ATM network ((6) in FIG. 3).

[0010] In the ATM network, the cellized transmission permission signal is input to the transmission-side adapter via a previously routed path ((7) in FIG. 3).

[0011] When the transmission adapter receives the cellized transmission permission signal from the ATM network, it restores and outputs it to the transmission terminal ((8) in FIG. 3).

The receiving terminal outputs a transmission permission signal to the second buffer to the receiving adapter ((9) in FIG. 3).

The receiving adapter converts the transmission permission signal into a cell and outputs the cell to the ATM network ((10) in FIG. 3).

In the ATM network, the cellized transmission permission signal is input to the transmission-side adapter via a previously routed path ((11) in FIG. 3).

When the transmission-side adapter receives the cellized transmission permission signal from the ATM network, it restores and outputs the signal to the transmission-side terminal ((12) in FIG. 3).

The receiving terminal outputs a transmission permission signal to the third buffer to the receiving adapter (see (1) in FIG. 3).
3)).

The receiving adapter converts the transmission permission signal into cells and outputs the cells to the ATM network ((14) in FIG. 3).

In the ATM network, the cellized transmission permission signal is input to the transmission adapter via a previously routed path ((15) in FIG. 3).

When the transmitting adapter receives the cellized transmission permission signal from the ATM network, it restores it and outputs it to the transmitting terminal ((16) in FIG. 3).

Upon receiving the transmission permission signal, the transmitting terminal outputs burst data to the transmitting adapter ((17) in FIG. 3).

The transmitting adapter converts the burst data from the transmitting terminal into cells and outputs the cells to the ATM network ((18) in FIG. 3).

In an ATM network, burst data converted into cells is input to a receiving adapter via a previously routed path ((1) in FIG. 3).
9)).

The receiving adapter restores the cellized burst data received from the ATM network and outputs it to the receiving terminal.

[0024]

However, in the above conventional example, the burst data is transmitted after the transmission terminal receives a plurality of transmission permission signals transmitted in advance according to the buffer state of the reception terminal. Therefore, overflow control of the buffer of the transmission adapter cannot be performed, and there is a disadvantage that a buffer as large as the buffer of the receiving terminal must be prepared in the transmission adapter.

Further, if the number of continuous transmission of the transmission permission signal is limited in order to solve the above-mentioned inconvenience, control for optimizing the throughput throughout the system becomes complicated, and the transfer capability of the system is maximized. There was a problem that it could not be demonstrated.

[0026]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the disadvantages of the prior art, and in particular to reduce the amount of buffer required for the transmitting side ATM terminal adapter, and to optimize the throughput throughout the system according to the amount of buffer. An object of the present invention is to provide an ATM terminal device capable of controlling transmission so as to be as follows.

[0027]

Means for Solving the Problems] Therefore, in the present invention, de
Data transmission request signal and burst data to an ATM network.
Transmitting terminal to receive data transmission request signal
And outputs a transmission permission signal in accordance with
Receiving terminal that receives burst data transmitted from the end
An ATM terminal device having an ATM network
The transmitting side according to the cellized transmission permission signal from the
Sender terminal adapter that grants transmission permission to terminal and ATM
Cellular data transmission request signal from the network,
When the burst data is restored and output to the receiving terminal,
The transmission permission signal from the receiving terminal is converted into a cell and AT
And a receiving terminal adapter for outputting to the M network.
ing. In addition, the transmitting terminal adapter is connected to the transmitting terminal.
Cell transmission request signal and burst data from the end
Burst data cell output to ATM network
Means for receiving a transmission permission signal from the ATM network
Counting, and the burst data
Receiving a burst data transmission completion signal from the
An up-down counter that counts down with
The count value from the drop-down counter is 1 or more,
And a transmission permission signal is output from the burst data cell forming means.
If it is output, a transmission permission signal is sent to the transmitting side terminal.
And a transmission permission signal generating means for outputting . This aims to achieve the above-mentioned object.

[0028]

The transmitting terminal outputs a data transmission request signal to the transmitting terminal adapter. The transmitting terminal adapter converts the data transmission request signal from the transmitting terminal into a cell and outputs the cell to the ATM network. In an ATM network, a cellized data transmission request signal is input to a receiving terminal adapter via a previously routed path.
The receiving terminal adapter restores the cellized data transmission request signal received from the ATM network and outputs it to the receiving terminal. Upon receiving the data transmission request signal from the receiving terminal adapter, the receiving terminal secures a built-in receiving buffer and outputs a transmission permission signal to a plurality of buffers to the receiving terminal adapter.

The receiving terminal adapter converts each transmission permission signal into a cell and outputs the cell to the ATM network. In the ATM network, each of the cellized transmission permission signals is input to a transmitting terminal adapter via a previously routed path. The transmitting terminal adapter counts the number of receptions upon receiving each of the cellized transmission permission signals from the ATM network. Further, the transmitting terminal adapter outputs a transmission permission signal to the transmitting terminal. Upon receiving the transmission permission signal, the transmitting terminal outputs burst data to the transmitting terminal adapter. The transmitting terminal adapter converts burst data from the transmitting terminal into cells and outputs the cells to the ATM network. In an ATM network, burst data converted into cells is input to a receiving-side terminal adapter via a previously routed path. The receiving terminal adapter restores the cellized burst data received from the ATM network and outputs it to the receiving terminal.

When the transmitting terminal adapter outputs the cellized burst data, it counts down the counter, and outputs a transmission permission signal to the transmitting terminal if the count value is not 0. Upon receiving the transmission permission signal, the transmitting terminal outputs burst data to the transmitting terminal adapter. This burst data is transmitted to the receiving terminal according to the procedure described above. The transmitting terminal adapter outputs a transmission permission signal to the transmitting terminal until the count value becomes zero.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The embodiment shown in FIG.
A transmitting terminal 10 that outputs a data transmission request signal or burst data, a receiving terminal 20 that outputs a transmission permission signal when receiving a data transmission request signal and receives burst data, and a data from the transmitting terminal 10. The transmission request signal and the burst data are converted into cells and output to the ATM network 50, and at the same time, the cellized transmission permission signal from the ATM network 50 is restored to confirm that the transmission buffer is empty, and the transmission terminal 10 is permitted to transmit. The transmitting-side terminal adapter 30 and the receiving-side terminal 2 which restores the cellized burst data from the ATM network 50 and
And a receiving terminal adapter 40 that outputs the signal to the ATM network 50 while outputting the transmission permission signal from the receiving terminal 20 to the cell.

Here, the transmission-side terminal adapter 30 has a burst data celling means 31 for converting the data transmission request signal and the burst data from the transmission-side terminal 10 into cells and outputting them to the ATM network 50, and a transmission permission signal from the ATM network 50. , An up / down counter 33 that counts up when it receives a burst data transmission completion signal from the burst data celling means 31 and counts down from the up / down counter 33 is 1 or more, and outputs a burst data cell. The transmission permission signal generating means 32 outputs a transmission permission signal to the transmitting terminal 10 when the local transmission permission signal is output from the means 31.

The receiving-side terminal adapter 40 is an ATM terminal.
A burst data restoring means 41 for restoring a cellized data transmission request signal or burst data from the network 50 and outputting the signal to the receiving terminal 20, and a transmission permission signal from the receiving terminal 20 to be cellified and output to the ATM network 50. The transmission permission signal celling means 42 is provided.

Next, the operation of this embodiment will be described with reference to the timing chart of FIG. However, a case where the receiving side has three types of buffers a, b, and c will be described as an example.

The transmitting terminal 10 outputs a data transmission request signal to the burst data celling means 31 ((1) in FIG. 2).

The burst data celling means 31 converts the data transmission request signal from the transmitting terminal 10 into cells,
Output to the network 50 ((2) in FIG. 2).

In the ATM network 50, the cellized data transmission request signal is input to the burst data restoration means 41 via a previously routed path ((3) in FIG. 2).

The burst data restoring means 41 restores the cellized data transmission request signal received from the ATM network 50 and outputs it to the receiving terminal 20 ((4) in FIG. 2).

When receiving the data transmission request signal from the burst data restoring means 41, the receiving side terminal 20 secures a built-in reception buffer and transmits a transmission permission signal a to the buffer a.
Is output to the transmission permission signal celling means 42 ((5) in FIG. 2).

The transmission permission signal celling means 42 converts the transmission permission signal a into a cell and outputs the cell to the ATM network 50 ((6) in FIG. 2).

In the ATM network 50, the cellized transmission permission signal a is input to the up / down counter 33 via a previously routed path ((7) in FIG. 2).

The up / down counter 33 counts up when receiving the cellized transmission permission signal a from the ATM network 50. Further, the up / down counter 33 outputs the count value to the transmission permission signal generating means 32. Here, the count value N is 1.

The transmission permission signal generating means 32 transmits the transmission permission signal since the count value from the up / down counter 33 is 1 or more and the local transmission permission signal from the burst data cell conversion means 31 indicates the transmission permission. The signal A is generated and output to the transmitting terminal 10 ((8) in FIG. 2).

The receiving terminal 20 outputs the transmission permission signal b to the buffer b to the transmission permission signal celling means 42 ((9) in FIG. 2).

The transmission permission signal celling means 42 converts the transmission permission signal b into cells and outputs the cells to the ATM network 50 ((10) in FIG. 2).

In the ATM network 50, the cellized transmission permission signal b is input to the up / down counter 33 via a previously routed path ((11) in FIG. 2).

The up / down counter 33 counts up when receiving the cellized transmission permission signal b from the ATM network 50. Further, the up / down counter 33 outputs the count value to the transmission permission signal generating means 32. Here, the count value N is 2.

The receiving terminal 20 outputs the transmission permission signal c to the buffer c to the transmission permission signal celling means 42 ((12) in FIG. 2).

The transmission permission signal celling means 42 converts the transmission permission signal c into a cell and outputs the cell to the ATM network 50 ((13) in FIG. 2).

In the ATM network 50, the cellized transmission permission signal c is input to the up / down counter 33 via a previously routed path ((14) in FIG. 2).

The up / down counter 33 counts up when receiving the cellized transmission permission signal c from the ATM network 50. Further, the up / down counter 33 outputs the count value to the transmission permission signal generating means 32. Here, the count value N is 3.

Upon receiving the transmission permission signal A, the transmitting terminal 10 outputs burst data to the burst data celling means 31 ((15) in FIG. 2).

The burst data celling means 31 converts the burst data from the transmitting terminal 10 into cells and outputs the cells to the ATM network 50 ((16) in FIG. 2).

In the ATM network 50, the burst data converted into cells is input to the burst data restoring means 41 via a previously routed path ((17) in FIG. 2).

The burst data restoring means 41 restores the cellized burst data received from the ATM network 50 and outputs it to the receiving terminal 20 ((1 in FIG. 2).
8)).

Upon receiving the burst data transmission completion signal from the burst data celling means 31, the up / down counter 33 counts down and outputs the count value to the transmission permission signal generating means 32. Here, the count value N is 2.

The transmission permission signal generating means 32 transmits the transmission permission signal since the count value from the up / down counter 33 is 1 or more and the local transmission permission signal from the burst data celling means 31 indicates transmission permission. A signal B is generated and output to the transmitting terminal 10 ((1) in FIG.
9)).

When the transmitting terminal 10 receives the transmission permission signal B, it outputs burst data to the burst data celling means 31 ((20) in FIG. 2).

The burst data celling means 31 converts the burst data from the transmitting terminal 10 into cells and outputs the cells to the ATM network 50 ((21) in FIG. 2).

In the ATM network 50, the burst data converted into cells is input to the burst data restoring means 41 via a previously routed path ((22) in FIG. 2).

The burst data restoring means 41 restores the cellized burst data received from the ATM network 50 and outputs the burst data to the receiving terminal 20 ((2 in FIG. 2).
3)).

When receiving the burst data transmission completion signal from the burst data celling means 31, the up / down counter 33 counts down and outputs the count value to the transmission permission signal generating means 32. Here, the count value N is 1.

The transmission permission signal generating means 32 determines whether the count value from the up / down counter 33 is 1 or more and the local transmission permission signal from the burst data cellizing means 31 indicates transmission permission. A signal C is generated and output to the transmitting terminal 10 ((2 in FIG. 2).
4)).

When the transmitting terminal 10 receives the transmission permission signal C, it outputs burst data to the burst data celling means 31 ((25) in FIG. 2).

The burst data celling means 31 converts the burst data from the transmitting terminal 10 into cells and outputs the cells to the ATM network 50 ((26) in FIG. 2).

In the ATM network 50, the burst data converted into cells is input to the burst data restoring means 41 via a previously routed path ((27) in FIG. 2).

The burst data restoring means 41 restores the cellized burst data received from the ATM network 50 and outputs it to the receiving terminal 20 ((2 in FIG. 2).
8)).

Upon receiving the burst data transmission completion signal from the burst data celling means 31, the up / down counter 33 counts down and outputs the count value to the transmission permission signal generating means 32. Here, the count value N is 0.

The transmission permission signal generating means 32 does not generate a transmission permission signal because the count value from the up / down counter 33 is 0.

In the above description, the burst data celling means 3
This is an example in which one buffer has only one burst data, and the transmission permission signal is not transmitted until the transmission of the burst data is completed. Means 3
1, the transmission permission signal can be exchanged without waiting for the completion of the transmission of the burst data.

[0072]

Since the present invention is constructed and functions as described above, according to this, it is possible to control the overflow of the buffer of the ATM terminal adapter on the transmitting terminal side. It is possible to provide an unprecedented superior ATM terminal adapter device that can reduce the required buffer amount and can control transmission so as to optimize the throughput throughout the system according to the buffer amount.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a timing chart for explaining the operation of the embodiment of FIG. 1;

FIG. 3 is a timing chart for explaining the operation of the conventional example.

[Explanation of symbols]

 10: Transmitting terminal 20: Receiving terminal 30: Transmitting terminal adapter 31: Burst data cell forming means 32: Transmission permission signal generating means 33: Up / down counter 40: Receiving terminal adapter 41: Burst data restoring means 42: Transmission Permission signal celling means 50: ATM network

Claims (2)

(57) [Claims] 1. A data transmission request signal and burst data are transmitted.
A sending terminal for outputting to an ATM network,
Output a transmission permission signal in response to receiving a transmission request signal.
Receiving burst data transmitted from the transmitting terminal.
An ATM terminal device having a receiving terminal for receiving the transmission permission signal from the ATM network.
A transmitting end for giving transmission permission to the transmitting terminal in accordance with the signal
Adapter and cellized from ATM network
Restore the data transmission request signal and burst data and receive
Output to the receiving terminal and permitting transmission from the receiving terminal.
Receiving side that converts enable signal into cells and outputs it to ATM network
A transmission adapter for transmitting a data transmission request signal or burst data from the transmission terminal into cells and outputting the cells to an ATM network;
An up / down counter that counts up when a transmission permission signal is received from the M network and counts down when a burst data transmission completion signal is received from the burst data celling means; and a count value from the up / down counter is 1 or more; A transmission permission signal generating means for outputting a transmission permission signal to the transmitting terminal when a transmission permission signal is output from the burst data cell forming means.
TM terminal device. 2. The receiving terminal adapter, wherein burst data restoring means for restoring a cellized data transmission request signal or burst data from an ATM network and outputting the burst data to the receiving terminal, and transmission from the receiving terminal. 2. A transmission permission signal cellizing means for cellifying a permission signal and outputting the cell to an ATM network.
The ATM terminal device according to claim 1.