JP4028111B2 - Communication apparatus and recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication device and a recording medium such as a router and a modem connected to a public communication line, and in particular, a non-communication state in which communication data such as packets (including ATM cells) is not communicated after the line is connected. The present invention relates to a communication apparatus and a recording medium for automatically disconnecting a public communication line when the communication continues for a certain time or longer.
[0002]
[Prior art]
Generally, in a public communication line such as a public telephone line or an ISDN (Integrated Services Digital Network) line, a fee system is provided for charging according to the communication distance and line usage time. Therefore, the communication device connected to the public communication line has a function of automatically disconnecting the public communication line when communication data transmission / reception is not performed for a certain period of time or longer in order to reduce communication charges. ing.
[0003]
FIG. 5A is a block diagram showing a configuration of a network communication system using a conventional communication device, and FIG. 5B is a block diagram showing a configuration of a conventional communication device. As shown in FIG. 5A, a conventional communication device B includes a public communication line (WAN (Wide Area Network) line) 20 such as a public telephone line and an ISDN line, and a LAN ( A device such as a router provided between the local area network 22 and the local area network. As shown in FIG. 5B, a conventional communication apparatus B includes a routing unit 23 that relays communication data between networks, and a call control unit that performs line connection in response to a line connection request from the routing unit 23. 24 and a no-communication monitoring unit 25 that monitors a no-communication state in which communication data is not communicated after the line is connected. The no-communication monitoring unit 25 measures the no-communication continuation time in which the no-communication state continues, and when the no-communication continuation time reaches the set monitoring reference time, the call control unit 24 And disconnect the communication path.
[0004]
[Problems to be solved by the invention]
In the conventional communication device B, the monitoring reference time is fixed to a constant value, but depending on the internal information (communication content) of the communication data, it may not always be optimal. For example, when the application of internal information of communication data is UUCP (Unix to Unix Copy), the communication data is communicated between machines without an operator's instruction. Therefore, since the data continues to flow until the application ends, the line can be disconnected as soon as the data flow stops. However, since it is not disconnected until the monitoring reference time is reached, the communication fee during that time is wasted. On the other hand, when the application of the internal information of the communication data is TELNET or FTP (File Transfer Protocol), the communication data is communicated between man-machines according to the instructions of the operator. Therefore, since data flows from time to time and the interval is long, the line should not be disconnected immediately even if the data flow stops. However, when the monitoring reference time is set to a short time, there is a disadvantage that unnecessary line disconnection frequently occurs.
[0005]
Furthermore, the conventional communication apparatus B cannot set an optimum monitoring reference time based on information related to transmission / reception intervals of past communication data.
[0006]
The present invention has been made to solve the above problems, and provides a communication device and a recording medium that can realize reduction of communication charges and prevention of unnecessary line disconnection by setting a more appropriate monitoring reference time. The purpose is to do.
[0007]
[Means for Solving the Problems]
The communication device of the present invention monitors a no-communication state in which communication data is not communicated after the line is connected, and requests disconnection when the time during which the no-communication state continues reaches a monitoring reference time. In the communication apparatus including the non-communication monitoring unit, the monitoring reference time is set according to the type of communication data application.
[0008]
The non-communication monitoring unit includes a determination unit that determines internal information of communication data, a monitoring reference time setting unit that determines an application from the internal information of communication data determined by the determination unit, and sets a monitoring reference time, You may have.
[0009]
The non-communication monitoring unit is configured to store information related to transmission / reception intervals of past communication data according to an application, and to monitor reference time based on information related to transmission / reception intervals of past communication data stored in the storage unit. And a monitoring reference time setting unit for setting.
[0010]
The internal information of the communication data may be determined based on the port number of the communication data.
[0011]
The monitoring reference time may be collectively set for an application communicated in accordance with an operator's instruction and an application communicated without an operator's instruction.
[0012]
The recording medium of the present invention monitors a non-communication state in which communication data is not communicated after the line is connected, and performs line disconnection processing when the non-communication state continues for a monitoring reference time. In a recording medium recording a non-communication monitoring program to be performed, a program for causing a computer to execute a process for setting a monitoring reference time according to the type of application of communication data is recorded.
[0013]
According to the present invention, it is possible to set an optimal monitoring reference time according to internal information of communication data and information related to transmission / reception intervals of past communication data.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are explanatory diagrams for explaining the first embodiment of the present invention.
[0015]
As shown in FIG. 1A, a communication apparatus A of the present invention includes a routing unit 1 that relays communication data between networks, and call control that performs line connection in response to a line connection request from the routing unit 1. And a non-communication monitoring unit 3 that monitors a non-communication state in which communication of communication data after line connection is not performed. The no-communication monitoring unit 3 measures the no-communication continuation time during which the no-communication state continues, and when the no-communication continuation time reaches the set monitoring reference time, the no-communication monitoring unit 3 issues a line disconnection request to the call control unit 2. And disconnect the communication path. Here, the no-communication continuation time differs depending on the type of application such as whether the application being communicated is TELNET or UUCP.
[0016]
Therefore, the non-communication monitoring unit 3 determines the application from the determination unit 4 that determines the internal information of the communication data, and the internal information of the communication data determined by the determination unit 4, and sets the monitoring reference time. And a time setting unit 5.
[0017]
When the communication data to be communicated is an IP (Internet Protocol) datagram, the determination unit 4 determines the internal information of the communication data (packet) D based on the port number P as shown in the frame of FIG. . For example, when the port number is 540, it is determined that the application of the internal information of the communication data is UUCP. When the port number is 23, the application of the internal information of the communication data is TELNET. If the port number is 21, it is determined that the application of the internal information of the communication data is FTP. Thus, it is preferable to use the port number of the communication data for determining the application because the application can be determined efficiently only by processing within the communication device.
[0018]
The monitoring reference time setting unit 5 sets the monitoring reference time of the communication data of the application communicated by the operator's instruction to a time longer than the monitoring reference time of the communication data of the application communicated without the instruction of the operator. Set. This is because the former communication data is communicated between man-machines, so even if the data flow stops, the line should not be disconnected immediately, whereas the latter communication data is communicated between machines. Therefore, the line may be disconnected as soon as the data flow stops. For example, as shown in the table of FIG. 2A, in the case of UUCP communication data communicated without an operator's instruction, the monitoring reference time is set to 10 seconds, and communication is performed according to the operator's instruction. In the case of TELNET or FTP communication data, the monitoring reference time is set to 180 seconds (3 minutes). Note that the monitoring reference time may be a constant value in many cases even in the case of an application communicated by an operator's instruction and in the case of an application communicated without an operator's instruction. There are no operational problems. Therefore, it is preferable to set each of them collectively, which is convenient, and it is also possible to prevent an erroneous setting due to an operator's mistake or the like (refer to the table in FIG. 2B).
[0019]
The no-communication monitoring unit 3 of the present invention may also include a storage unit 6 for storing information related to transmission / reception intervals of past communication data, as shown in the table of FIG. In this case, the monitoring reference time setting unit 5 sets an optimal monitoring reference time (for example, an average value or a maximum value) based on information related to the transmission / reception interval of past communication data stored in the storage unit 6. The information in the storage unit 6 is preferably updated as needed. Note that the monitoring reference time setting unit 5 may set the optimum monitoring reference time only with information related to the past transmission / reception interval, regardless of the internal information of the communication data, or the internal information of the communication data and the past transmission / reception. An optimal monitoring reference time may be set for each piece of internal information of communication data based on information about the interval.
[0020]
FIG. 3 is a flowchart for explaining the operation of the present invention. First, when communication data to be routed is generated in the routing unit 1 and line connection is necessary, the routing unit 1 makes a line connection request to the call control unit 2. In response to the line connection request, the call control unit 2 performs line connection (step S1).
[0021]
Next, the routing unit 1 notifies the non-communication monitoring unit 3 of the internal information of the communication data during routing (step S2).
[0022]
Next, the determination unit 4 of the non-communication monitoring unit 3 that has received the above notification determines internal information of the communication data based on the port number of the communication data (step S3).
[0023]
Next, the monitoring reference time setting unit 5 of the non-communication monitoring unit 3 sets the monitoring reference time based on internal information of communication data and information on transmission / reception intervals of past communication data (step S4).
[0024]
Next, the no-communication monitoring unit 3 determines whether or not the no-communication continuation time in which the no-communication state in which communication data is not communicated after the line connection has continued has reached the monitoring reference time (step S5). .
[0025]
When the non-communication duration has reached the monitoring reference time, the call control unit 2 is requested to disconnect the line (step S6). If the no-communication continuation time has not reached the monitoring reference time, it is determined whether or not communication of communication data has been completed (step S7). If not, the process returns to step S5.
[0026]
According to the present invention, since it is possible to set an optimal monitoring reference time according to internal information of communication data and information related to transmission / reception intervals of past communication data, it is possible to reduce communication charges and uselessly It is possible to prevent frequent disconnection of the line.
[0027]
FIG. 4 is a block diagram showing a configuration according to the second embodiment of the present invention. The second embodiment includes a recording medium 10 that records a program (non-communication monitoring process program) that causes a computer to execute the non-communication monitoring process described above. The recording medium 10 may be a magnetic disk, a CD-ROM, a semiconductor memory, or other recording medium.
[0028]
The non-communication monitoring processing program is read from the recording medium 10 into the non-communication monitoring unit 3, and the non-communication monitoring unit 3 determines the internal information of the communication data according to the non-communication monitoring processing program, and the determined communication data The monitoring reference time setting process for setting the monitoring reference time is executed according to the internal information.
[0029]
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical matters described in the claims.
[0030]
【The invention's effect】
According to the present invention, since it is possible to set an optimal monitoring reference time according to internal information of communication data and information related to transmission / reception intervals of past communication data, it is possible to reduce communication charges and uselessly It is possible to prevent frequent disconnection of the line.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram for explaining a first embodiment of the present invention;
FIG. 2 is an explanatory diagram for explaining a first embodiment of the present invention.
FIG. 3 is a flowchart for explaining the operation of the present invention.
FIG. 4 is a block diagram showing a configuration according to a second embodiment of the present invention.
5A is a block diagram showing a configuration of a network communication system using a conventional communication device, and FIG. 5B is a block diagram showing a configuration of a conventional communication device.
[Explanation of symbols]
A: Communication device 1: Routing unit 2: Call control unit 3: No communication monitoring unit 4: Discriminating unit 5: Monitoring reference time setting unit 6: Storage unit 10: Recording medium

Claims (2)

Equipped with a no-communication monitoring unit that monitors the no-communication state where communication data is not communicated after the line is connected, and requests disconnection when the time during which the no-communication state continues reaches the monitoring reference time In the communication device
The non-communication monitoring unit determines an application from a determination unit that determines internal information of communication data, and internal information of the communication data determined by the determination unit, and sets the monitoring reference time according to the type of application A monitoring reference time setting unit, and a storage unit that stores information related to transmission / reception intervals of past communication data according to the application,
The monitoring reference time setting unit sets a monitoring reference time of communication data of an application communicated by an operator's instruction to a time longer than a monitoring reference time of communication data of an application communicated without an instruction of the operator. And setting an optimal monitoring reference time for each piece of internal information of communication data based on the internal information of the communication data determined by the determination unit and the information related to the past transmission / reception interval stored in the storage unit To
A communication device.   The communication apparatus according to claim 1, wherein internal information of the communication data is determined based on a port number of the communication data.

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