JPH04351135A - Data communication equipment in isdn - Google Patents

Abstract

PURPOSE:To smooth data communication and to improve the man-machine interface by deciding the exchange connection system based on a transmission quantity per unit time required for a connection control section and a connection elapsed time and switching the exchange system automatically. CONSTITUTION:A fuzzy inference arithmetic section 5 receives a data quantity x1 and a storage data x2 to execute fuzzy inference and outputs a required throughput (f) to a connection control section 6. The connection control section 6 discriminates whether or not the changeover of the exchange connection system is required. After it is discriminated that the changeover is required, when a connection elapsed time (t) counted by a timer of a connection time measurement section 6a exceeds a prescribed time, the exchange connection system is selected to either the B channel packet exchange or the D channel packet exchange to reset the timer. Moreover, a connection processing section 7 selects the B channel line exchange set at present into the B channel packet exchange or the D channel packet exchange.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication device using ISDN, and particularly to a data communication device that automatically switches switching connection methods.

0002

2. Description of the Related Art Generally, in ISDN, switching connection systems such as D channel packet switching, B channel packet switching, and B channel line switching are known, and data communication equipment using ISDN is capable of connecting each of the switching connections as described above. The system is configured to perform data communication by manually selecting and switching one of the methods.

0003

[Problem to be Solved by the Invention] However, in such conventional data communication devices, data communication is performed by arbitrarily manually selecting and switching one of the switching connection methods as described above. , data communication cannot be performed smoothly.

[0004] In addition, in the past, even though conversational data, etc., which had a small amount of data and a large amount of non-communication time, was transferred, the switching connection method was incorrectly selected and B channel line switching was selected. Even though it is necessary to transfer a large amount of data at high speed, the data transfer time may be longer because the above selection was incorrect and B channel packet exchange or D channel packet exchange was selected. Problems such as delays may occur.

[0005] The present invention has been made by focusing on the above-mentioned conventional problems, and provides a system for automatically switching the switching connection method based on the currently required transmission amount per unit time and the elapsed connection time. The aim is to solve the above problems.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the invention according to claim 1 provides a method for receiving a plurality of data transmission requests sent in chronological order, and determining the amount of data received per unit time. a reception unit; a data storage unit that stores the data transmission requests and calculates an increase/decrease in the stored data; and a data transmission unit that transmits the data transmission requests in the data storage unit and calculates the amount of transmission per unit time. Based on the above-mentioned amount of reception and transmission per unit time,
A data amount calculation unit that calculates the amount of data indicating whether the amount of reception is larger than the amount of transmission, and the amount of data and the increase/decrease amount of accumulated data as input values, and the amount of transmission per unit time that is currently required as an output value. A necessary throughput calculating unit that calculates, a connection control unit that determines an exchange connection method based on the above-mentioned currently required transmission amount per unit time and elapsed connection time, and a connection that switches to the exchange connection method determined by the above-mentioned connection control unit. It is characterized by consisting of a processing section.

[0007] The invention according to claim 2 is characterized in that the required throughput calculation section is a fuzzy inference calculation section.

[0008]

[Operation] According to the present invention, the connection control unit determines the exchange connection method based on the currently required transmission amount per unit time and the elapsed connection time, while the connection processing unit determines the exchange connection method determined by the connection control unit. Switch to the connection method.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a data communication device according to the present invention will be described in detail below with reference to FIGS. 1 to 3.

As shown in FIG. 1, this data communication device has a data reception section 1, a data storage section 2, and a data transmission section 3. Receive request a and find the amount b of the request per unit time.

The data storage unit 2 temporarily stores the data transmission request a and calculates the increase/decrease x2 in the stored data. The data transmitting section 3 is configured to transmit the data transmission request a in the data storage section 2 toward a receiving terminal (not shown) and to determine its throughput, that is, the amount of transmission c per unit time.

Further, this device is provided with a data amount calculation section 4 and a fuzzy inference section 5 as a required throughput calculation section, and the data amount calculation section 4 calculates the reception amount b and transmission amount c per unit time. Based on this, the data amount x1 is determined. This data amount x1 represents whether the received amount b is larger than the transmitted amount c.

On the other hand, the fuzzy inference section 5 stores fuzzy rules as shown in FIG. 2 in advance, and
Using the above data amount x1 and accumulated data increase/decrease x2 as input values, the fuzzy inference is executed by applying the above fuzzy rules to these input values, and the output value is the currently required transmission amount f (hereinafter referred to as necessary). Throughput f) is output. The membership functions for input and output values used in this fuzzy rule are shown in Figure 3.
In the figure, (a) shows a membership function for the data amount x1, (b) shows a membership function for the accumulated data increase/decrease x2, and (c) shows a membership function for the required throughput f.

Furthermore, this device includes a connection control section 6 and a connection processing section 7, and the connection control section 6 calculates the required throughput f and the connection progress by executing the process of the flowchart shown in FIG. The exchange connection method is determined based on the time t. Here, the connection elapsed time t is counted by the timer of the connection time measuring section 6a. On the other hand, the connection processing section 7 is configured to switch the current exchange connection method to the exchange connection method determined as described above.

Next, the operation of the data communication device configured as described above will be explained using FIGS. 1 to 4.

According to this data communication device, when the data reception section 1 outputs the reception amount b per unit time and the data transmission section 3 outputs the transmission amount c per unit time to the data calculation section 3, the data amount calculation is performed. The unit 4 calculates the data amount x1 based on the reception amount b and the transmission amount c per unit time, and outputs the data amount x1 to the fuzzy inference calculation section 5. Apart from this, the data storage unit 2
2 is output to the fuzzy inference calculation section 5.

In this way, when the data amount x1 and the accumulated data increase/decrease amount x2 are output to the fuzzy inference calculation section 5, the fuzzy inference operation section 5 takes the data amount x1 and the accumulated data increase/decrease amount x2 as input values, Fuzzy inference is executed by applying fuzzy rules to these input values, and the required throughput f is output to the connection control unit 6 as an output value.

Furthermore, as shown in FIG. 4, the connection control unit 6 determines whether or not it is necessary to switch the exchange connection method based on the required throughput f (step 100).
). In other words, such a judgment is based on, for example, when B channel circuit switching is selected and conversational data with a small amount of data and a large amount of non-communication time is transferred, the required throughput f is as shown in FIG. 3(c). If the number of units falls within the range of "considerably reduced", the above B channel line exchange will be
It is determined that it is necessary to switch to channel packet exchange or D channel packet exchange (Yes).

After determining that it is necessary to switch as described above, it is determined whether the elapsed connection time t counted by the timer of the connection time measuring section 6a has exceeded a certain period of time (3 minutes, etc.) (step 102). ), here, if it is determined that a certain period of time has been exceeded (No), the exchange connection method is selected and determined as either B channel packet exchange or D channel packet exchange (step 104), and the above-mentioned timer is reset (step 104). 106). In this way,
When the switching connection method is determined, the connection processing unit 7 switches the currently set B channel line switching to B channel packet switching or D channel packet switching as described above.

[0020] Also, in step 101 above, when it is determined that there is no need to switch the exchange connection method (No.
), data continues to be transferred using the currently selected exchange connection method. In addition, although it is determined in step 101 that it is necessary to switch the exchange connection method (Yes
), even when it is determined in step 102 that the connection elapsed time t does not exceed a certain time (No), data is transferred using the currently selected exchange connection method.

By the way, in step 100, B
When channel packet switching is selected and a large amount of data is to be transferred, if the required throughput f falls within the range of "considerable increase" on the set of units shown in Figure 3(c), B channel packet switching is selected. It is determined that it is necessary to switch to B-channel circuit switching.

Therefore, according to the data communication device as described above, the connection control section determines the exchange connection method based on the required throughput, that is, the currently required transmission amount per unit time and the elapsed connection time, and Since the connection processing unit switches to the exchange connection method, the exchange connection method can be automatically selected according to the amount of communication data.

[0023] In particular, with the above device, when transferring conversational data etc. that have a small amount of data and a large amount of non-communication time,
Even if the switched connection method is set to, for example, circuit switching, it can be automatically switched to packet switching, reducing idle time and unnecessary communication charges. Even if the switching connection method is set to packet switching, for example, it is automatically switched to circuit switching, so data can be transferred at high speed.

Moreover, in the above device, since the connection time measuring section recognizes the elapsed connection time, it is possible to suppress the increase in charges for circuit switched connections due to frequent switching.

In this embodiment, a fuzzy inference calculation unit is used as the required throughput calculation unit, but such a required throughput calculation unit takes the amount of data and the increase/decrease in accumulated data as input values, and calculates the output value. The present invention is not limited to a fuzzy inference calculation unit, as long as it can calculate the amount of transmission per unit time that is actually required.

[0026]

Effects of the Invention As described above, in the data communication device according to the present invention, the connection control unit determines the exchange connection method based on the currently required transmission amount per unit time and the elapsed connection time, and the determined exchange connection Since the connection processing unit switches between the exchange and connection methods, the exchange connection method can be automatically selected in accordance with the amount of communication data, resulting in smoother data communication and improved man-machine interface.

In particular, with this device, when transferring conversational data, etc., which has a small amount of data and a large amount of non-communication time,
Even if the switched connection method is set to, for example, circuit switching, it can be automatically switched to packet switching, reducing idle time and unnecessary communication charges. Even if the switching connection method is set to packet switching, for example, it is automatically switched to circuit switching, so data can be transferred at high speed.

Moreover, in this device, since the connection time measuring unit recognizes the elapsed connection time, it is possible to suppress the increase in fees for circuit switched connections due to frequent switching. Moreover, the same effect as above can be obtained also in the invention according to claim 2.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a data communication device according to the present invention.

FIG. 2 is an explanatory diagram showing the relationship between input/output values and fuzzy rules in a fuzzy inference section.

FIG. 3: Membership functions for input and output values used in fuzzy rules.

FIG. 4 is a flowchart illustrating processing operations of a connection control unit.

[Explanation of symbols]

1 Data reception section 2 Data storage section 3 Data transmission section 4 Data amount calculation section 5 Fuzzy inference calculation section (required throughput calculation section)
6 Connection control unit 7 Connection processing unit a Data transmission request b Reception amount per unit time c Transmission amount per unit time f Required throughput (currently required transmission amount per unit time) t Connection elapsed time x1 Data amount x2 Accumulated data increase/decrease

Claims (2)

[Claims] Claim 1: A data reception unit that receives a plurality of data transmission requests sent in chronological order and calculates the amount of data received per unit time; and a data reception unit that stores the data transmission requests and calculates an increase or decrease in the stored data. a data storage unit that sends a data transmission request in the data storage unit and calculates the transmission amount per unit time, and a data transmission unit that calculates the transmission amount based on the reception amount and transmission amount per unit time. It is necessary to have a data amount calculation unit that calculates the amount of data indicating whether the received amount is large or not, and to use the above data amount and accumulated data increase/decrease as input values, and calculate the currently required amount of transmission per unit time as an output value. a throughput calculation unit; a connection control unit that determines an exchange connection method based on the currently required transmission amount per unit time and the elapsed connection time; and a connection processing unit that switches to the exchange connection method determined by the connection control unit. A data communication device in ISDN characterized by comprising: 2. The IS according to claim 1, wherein the required throughput calculation section is a fuzzy inference calculation section.
Data communication device in DN.