JP2016154319A - Communication system and communication control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to change a channel used for a first terminal device 111A's communication from a first channel 101 to a second channel 102, when a load on the first channel 101 is heavy.SOLUTION: A terminal side relay device 300 acquires a load value indicating the magnitude of a load applied to a first channel 101. A communication control device 200 compares the load value with a load threshold to determine whether or not the load applied to the first channel 101 is heavy. When it is determined that the load applied to the first channel 101 is heavy, the terminal side relay device 300 and a partner side relay device 400 perform channel change processing. The channel change processing is processing of changing a channel used for communication by a first terminal device 111A, a terminal device 111 identified by a target terminal identifier, from the first channel 101 to a second channel.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for controlling communication in a communication system having a plurality of lines.

Patent Document 1 discloses a technique of allocating a service having a high priority to another line when communication quality of a line used for services such as a simulation service, a stock transaction service, and a stock price information distribution service deteriorates. ing.
Patent Document 2 discloses a technique of confirming a time zone when a dedicated line is heavily loaded based on statistical information and changing the communication line from a dedicated line to a detour line before that time period.
Patent Document 3 discloses a technique for detecting abnormal traffic generated in a network.

JP 2010-187039 A Japanese Patent Laid-Open No. 2003-037668 JP 2008-079138 A

  The present invention makes it possible to change a line used for communication of a specific terminal device from the first line to the second line when the load on the first line used by a plurality of terminal devices is large. For the purpose.

The communication system of the present invention includes:
A target terminal identifier storage unit that stores a target terminal identifier for identifying any one of the plurality of terminal devices that perform communication using the first line;
A load value acquisition unit that acquires a load value indicating a load applied to the first line;
A load determination unit that determines whether the load applied to the first line is large by comparing the load value with a load threshold;
Line change processing for changing a line used for communication of the terminal device identified by the target terminal identifier from the first line to the second line when it is determined that the load on the first line is large A line changing unit for performing

  According to the present invention, when the load on the first line used by a plurality of terminal devices is large, the line used for communication of the terminal device identified by the target terminal identifier is changed from the first line to the second line. It can be changed to a line.

1 is a configuration diagram of a communication system 100 according to Embodiment 1. FIG. 2 is a functional configuration diagram of a communication control apparatus 200 according to Embodiment 1. FIG. 2 is a functional configuration diagram of a terminal-side relay device 300 according to Embodiment 1. FIG. The figure which shows the relay setting file 391 in Embodiment 1. FIG. FIG. 3 is a functional configuration diagram of a counterpart relay device 400 in the first embodiment. The figure which shows the relay setting file 491 in Embodiment 1. FIG. 3 is a flowchart of a communication control method according to Embodiment 1. FIG. 3 is a hardware configuration diagram of the communication control device 200, the terminal-side relay device 300, and the counterpart-side relay device 400 according to the first embodiment. The function block diagram of the communication control apparatus 200 in Embodiment 2. FIG. The figure which shows the object flow file 292 in Embodiment 2. FIG. The figure which shows the relay setting file 391 in Embodiment 2. FIG. The figure which shows the relay setting file 491 in Embodiment 2. FIG. The figure which shows the object flow file 292 in Embodiment 3. FIG. The figure which shows the relay setting file 391 in Embodiment 3. FIG. The figure which shows the relay setting file 491 in Embodiment 3. FIG. FIG. 10 is a functional configuration diagram of a communication control apparatus 200 according to a fourth embodiment. FIG. 10 is a functional configuration diagram of a terminal-side relay device 300 according to a fourth embodiment. 10 is a flowchart of a communication control method according to the fourth embodiment. The figure which shows the structural example of the communication system 100 in each embodiment.

Embodiment 1 FIG.
Regarding a mode in which the line used for communication of the terminal device identified by the target terminal identifier is changed from the first line to the second line when the load on the first line used by a plurality of terminal devices is large This will be described with reference to FIGS.

*** Explanation of configuration ***
Based on FIG. 1, the structure of the communication system 100 is demonstrated.
The communication system 100 includes a plurality of terminal devices 111, a terminal-side relay device 300, a partner-side relay device 400, a plurality of communication partners 121 and a communication control device 200.
The plurality of terminal devices 111 are connected to the terminal network 119 and communicate with the plurality of communication partners 121 via the terminal-side relay device 300.
The terminal network 119 is a network that connects the plurality of terminal devices 111 and the terminal-side relay device 300.

The terminal-side relay device 300 is a router that relays packets communicated between the plurality of terminal devices 111 and the plurality of communication partners 121. However, the terminal-side relay device 300 may be a relay device other than the router.
The terminal-side relay device 300 includes a first relay port 301 connected to the first line 101, a second relay port 302 connected to the second line 102, and a third relay port connected to the terminal network 119. 303.
The first line 101 is a bandwidth guaranteed line, and the second line 102 is a best effort line. However, the first line 101 and the second line 102 may be other types of lines.

The plurality of communication partners 121 are server devices. However, the plurality of communication partners 121 may be devices other than the server device.
The plurality of communication partners 121 are connected to the partner network 129 and communicate with the plurality of terminal devices 111 via the partner-side relay device 400.
The partner network 129 is a network that connects the plurality of communication partners 121, the partner-side relay device 400, and the communication control device 200.

The counterpart relay device 400 is a router that relays packets communicated between the plurality of communication partners 121 and the plurality of terminal devices 111. However, the counterpart relay device 400 may be a relay device other than the router.
The counterpart relay device 400 includes a first relay port 401 connected to the first line 101, a second relay port 402 connected to the second line 102, and a third relay port connected to the counterpart network 129. 403.

  When the load on the first line 101 is not large, communication between the plurality of terminal apparatuses 111 and the plurality of communication partners 121 is performed using the first line 101.

The communication control device 200 instructs to change the line used for communication of the first terminal device 111A from the first line 101 to the second line 102 when the load on the first line 101 is large. The change command is transmitted to the terminal side relay device 300 and the counterpart side relay device 400.
The terminal-side relay device 300 and the partner-side relay device 400 perform line change processing for changing the line used for communication of the first terminal apparatus 111A from the first line 101 to the second line 102 in accordance with the line change command. Do.
After the line change process is performed, communication between the first terminal device 111A and the plurality of communication partners 121 is performed using the second line 102.

Based on FIG. 2, the functional configuration of the communication control apparatus 200 will be described.
The communication control apparatus 200 includes a load value receiving unit 210, a load determination unit 220, a line change command unit 230, and a target terminal identifier storage unit 290.
The load value receiving unit 210 receives a load value that represents the magnitude of the load applied to the first line 101.
The load determination unit 220 determines whether the load applied to the first line 101 is large by comparing the load value with a load threshold.
When it is determined that the load on the first line 101 is large, the line change command unit 230 transmits a line change command to the terminal-side relay device 300 and the partner-side relay device 400. This line change command is a packet including the target terminal identifier 291. The target terminal identifier 291 is IP _X1 used as an IP address for identifying the first terminal device 111A.
The target terminal identifier storage unit 290 stores a target terminal identifier 291 that identifies any one of the plurality of terminal devices 111 that perform communication using the first line 101.

Based on FIG. 3, the functional configuration of the terminal-side relay device 300 will be described.
The terminal-side relay device 300 includes a load value acquisition unit 310, a line change command reception unit 320, a line change unit 330, a packet relay unit 380, and a relay setting file storage unit 390.
The load value acquisition unit 310 acquires a load value that represents the magnitude of the load applied to the first line 101.
The line change command receiving unit 320 receives a line change command including the target terminal identifier 291.
The line change unit 330 performs line change processing when a line change command is accepted. This line change process is a process for changing the line used for communication of the terminal device 111 identified by the target terminal identifier 291 from the first line 101 to the second line 102.
The packet relay unit 380 relays the packet based on the relay setting file 391 for selecting a line used for communication between the plurality of terminal apparatuses 111 and the plurality of communication partners 121.
The relay setting file storage unit 390 stores a relay setting file 391.

The relay setting file 391 will be described with reference to FIG.
The relay setting file 391 includes a relay setting record corresponding to one line in the figure.
The relay setting record includes a relay setting identifier, a transmission source address, and an output port number.
The relay setting identifier is an identifier for identifying a relay setting record.
The source address is the IP address of the source.
The relay port number is an identifier for identifying the relay port.

The first relay setting record whose relay setting identifier is 1 includes IP _X1 that is the IP address of the first terminal device 111A as a transmission source address, and 1 that is the port number of the first relay port 301 is the relay port. Includes as a number.
The second relay setting record whose relay setting identifier is 2 includes IP _X2 , which is the IP address of the second terminal device 111B, as a transmission source address, and 1 which is the port number of the first relay port 301 is the relay port. Includes as a number.

The operation of the packet relay unit 380 will be described based on FIG. 4 and FIG.
In FIG. 1, when the first terminal device 111 </ b> A transmits a packet including IP _X <b> 1 as a transmission source address, the packet relay unit 380 receives this packet at the third relay port 303.
Next, the packet relay unit 380 selects the first relay setting record including IP _X1 as the transmission source address from the relay setting file 391 in FIG.
Then, the packet relay unit 380 transmits the received packet from the first relay port 301 identified by the relay port number included in the first relay setting record. As a result, this packet is communicated using the first line 101.

In FIG. 1, when the second terminal device 111 </ b> B transmits a packet including IP _X2 as a transmission source address, the packet relay unit 380 receives this packet at the third relay port 303.
Next, the packet relay unit 380 selects a second relay setting record including IP _X2 as a transmission source address from the relay setting file 391 in FIG.
Then, the packet relay unit 380 transmits the received packet from the first relay port 301 identified by the relay port number included in the second relay setting record. As a result, this packet is communicated using the first line 101.

Based on FIG. 5, the functional configuration of the counterpart relay device 400 will be described.
The counterpart relay apparatus 400 includes a line change command receiving unit 420, a line change unit 430, a packet relay unit 480, and a relay setting file storage unit 490.
The line change command receiving unit 420 receives a line change command including the target terminal identifier 291.
The line change unit 430 performs line change processing when a line change command is accepted. This line change process is a process for changing the line used for communication of the terminal device 111 identified by the target terminal identifier 291 from the first line 101 to the second line 102.
The packet relay unit 480 relays the packet based on the relay setting file 491 for selecting a line used for communication between the plurality of terminal apparatuses 111 and the plurality of communication partners 121.
The relay setting file storage unit 490 stores a relay setting file 491.

The relay setting file 491 will be described with reference to FIG.
The relay setting file 491 includes a relay setting record corresponding to one line in the figure.
The relay setting record includes a relay setting identifier, a transmission destination address, and an output port number.
The transmission destination address is the IP address of the transmission destination.

The first relay setting record whose relay setting identifier is 1 includes IP _X1 which is the IP address of the first terminal device 111A as a transmission destination address, and 1 which is the port number of the first relay port 401 is the relay port. Includes as a number.
The second relay setting record whose relay setting identifier is 2 includes IP _X2 , which is the IP address of the second terminal device 111B, as a transmission destination address, and 1 which is the port number of the first relay port 401 is the relay port. Includes as a number.

The operation of the packet relay unit 480 will be described based on FIG. 6 and FIG.
In FIG. 1, when any one of communication partners 121 transmits a packet including IP _X1 as a transmission destination address, the packet relay unit 480 receives this packet at the third relay port 403.
Next, the packet relay unit 480 selects the first relay setting record including IP _X1 as the transmission destination address from the relay setting file 491 in FIG.
Then, the packet relay unit 480 transmits the received packet from the first relay port 401 identified by the relay port number included in the first relay setting record. As a result, this packet is communicated using the first line 101.

In FIG. 1, when any one of communication partners 121 transmits a packet including IP _X2 as a transmission destination address, the packet relay unit 480 receives this packet at the third relay port 403.
Next, the packet relay unit 480 selects the second relay setting record including IP _X2 as the transmission destination address from the relay setting file 491 in FIG.
Then, the packet relay unit 480 transmits the received packet from the first relay port 401 identified by the relay port number included in the second relay setting record. As a result, this packet is communicated using the first line 101.

*** Explanation of operation ***
Based on FIG. 7, the process of the communication control method will be described.

S110 is a load value acquisition process.
In S110, the load value acquisition unit 310 of the terminal-side relay device 300 acquires the communication amount, the response time, and the packet loss amount on the first line 101. These values are load values representing the magnitude of the load applied to the first line 101.
The communication amount is a data amount of a packet transmitted / received via the first relay port 301 by the packet relay unit 380. The amount of communication is also called bandwidth.
The response time is the time from when the response request packet is transmitted to the counterpart relay device 400, the communication control device 200, or the communication counterpart 121 until the response packet is received. As a technique for measuring the response time, there is a PING command of ICMP (Internet Control Message Protocol).
The packet loss amount is the number of response request packets in which a timeout has occurred in which a response packet is not received even after a waiting time elapses among a plurality of response request packets.
After S110, the process proceeds to S120.

S120 is a load value notification process and a load value reception process.
In S120, the load value acquisition unit 310 generates a load notification that is a packet including the communication amount, the response time, and the packet loss amount, and transmits the load notification to the communication control apparatus 200.
And the load value reception part 210 of the communication control apparatus 200 receives a load notification.
After S120, the process proceeds to S130.

S130 is a load determination process.
In S130, the load determination unit 220 of the communication control device 200 compares the communication amount included in the load notification with the communication amount threshold, compares the response time included in the load notification with the response time threshold, and includes the packet included in the load notification. The amount of loss is compared with a packet loss amount threshold. The traffic threshold, response time threshold, and packet loss threshold are load thresholds.
Here, at least one of the case where the communication amount is larger than the communication amount threshold, the case where the response time is longer than the response time threshold, and the case where the packet loss amount is larger than the packet loss amount threshold, Is greater than the load threshold. When the load value is larger than the load threshold, it can be determined that the load applied to the first line 101 is large.
If the load value is greater than the load threshold (YES), the process proceeds to S140.
If the load value is less than or equal to the load threshold (NO), the processing of the communication control method ends.

S140 is a line change command process and a line change command reception process.
In S140, the line change command unit 230 of the communication control apparatus 200 generates a line change command that is a packet including IP _X1 that is the target terminal identifier 291 and sends the line change command to the terminal-side relay device 300 and the partner-side relay device. 400.
Then, the line change command accepting unit 320 of the terminal-side relay device 300 and the line change command accepting unit 420 of the counterpart relay device 400 receive the line change command.
After S140, the process proceeds to S150.

S150 is a line change process.
In S150, the line change command accepting unit 320 selects a first relay setting record from the relay setting file 391 in FIG. 4 for the same source address as IP _X1 included in the line change command.
Then, the line change command reception unit 320 changes the relay port number included in the selected first relay setting record to 2 that is the port number of the second relay port 302.

Also, the line change command reception unit 420 selects the first relay setting record including the same destination address as the IP _X1 included in the line change command from the relay setting file 491 in FIG.
Then, the line change command receiving unit 420 changes the relay port number included in the selected first relay setting record to 2 which is the port number of the second relay port 402.
After S150, the process of the communication control method ends.

Due to S150 of the communication control method, the relay port number included in the first relay setting record is changed to 2 which is the port number of the second relay port 302 in FIG.
Therefore, when the packet relay unit 380 of the terminal-side relay device 300 receives a packet including IP _X1 as a transmission source address, the packet relay unit 380 transmits the received packet from the second relay port 302. As a result, this packet is communicated using the second line 102.

By the communication control method S150, the relay port number included in the first relay setting record is changed to 2 which is the port number of the second relay port 402 in FIG.
Therefore, when the packet relay unit 480 of the counterpart relay device 400 receives a packet including IP _X1 as the transmission destination address, the packet relay unit 480 transmits the received packet from the second relay port 402. As a result, this packet is communicated using the second line 102.

Based on FIG. 8, the hardware configuration of the communication control device 200, the terminal-side relay device 300, and the partner-side relay device 400 will be described.
The communication control device 200, the terminal-side relay device 300, and the partner-side relay device 400 are computers that include an arithmetic device 901, an auxiliary storage device 902, a main storage device 903, a communication device 904, and an input / output device 905.
The arithmetic device 901, auxiliary storage device 902, main storage device 903, communication device 904, and input / output device 905 are connected to the bus 909.

The arithmetic device 901 is a CPU (Central Processing Unit) that executes a program.
The auxiliary storage device 902 is, for example, a ROM (Read Only Memory), a flash memory, or a hard disk device.
The main storage device 903 is, for example, a RAM (Random Access Memory).
The communication device 904 performs communication via the Internet, a LAN (local area network), a telephone line network, or other networks in a wired or wireless manner.
The input / output device 905 is, for example, a mouse, a keyboard, or a display device.

The program is stored in the auxiliary storage device 902.
For example, an operating system (OS) is stored in the auxiliary storage device 902. In addition, a program that realizes the function described as “˜unit” is stored in the auxiliary storage device 902.
The program is stored in the auxiliary storage device 902, loaded into the main storage device 903, read into the arithmetic device 901, and executed by the arithmetic device 901.

  Information, data, files, signal values, or variable values indicating results of processing such as determination, determination, extraction, detection, setting, registration, selection, generation, input, and output are stored in the main storage device 903 or the auxiliary storage device 902. The

*** Explanation of effects ***
When the load on the first line 101 used by the plurality of terminal apparatuses 111 is large, the communication system 100 sets the first line used for communication of the first terminal apparatus 111A identified by the target terminal identifier 291. The line 101 can be changed to the second line 102. That is, the line can be switched for each terminal device 111. As a result, the load on the first line 101 is reduced.

Embodiment 2. FIG.
In the line change process described in the first embodiment, the line used for communication between the terminal device identified by the target terminal identifier and the communication partner identified by the target partner identifier is changed from the first line to the second line. The form which is the process to change is demonstrated based on FIGS. 9-12.
Matters that are not described in the second embodiment are the same as those in the first embodiment.

*** Explanation of configuration ***
The configuration of the communication system 100 is the same as the configuration described in Embodiment 1 with reference to FIG.

Based on FIG. 9, the functional configuration of the communication control apparatus 200 will be described.
The communication control apparatus 200 includes a load value receiving unit 210, a load determination unit 220, a line change command unit 230, and a target terminal identifier storage unit 290.
The functions of the load value reception unit 210 and the load determination unit 220 are the same as those described in Embodiment 1 with reference to FIG.
When it is determined that the load on the first line 101 is large, the line change command unit 230 sends a line change command including the target terminal identifier and the target partner identifier to the terminal-side relay device 300 and the partner-side relay device 400. Send to.
The target terminal identifier storage unit 290 stores a target flow file 292 including a target terminal identifier and a target partner identifier.
The target partner identifier identifies one of the plurality of communication partners 121.

The target flow file 292 will be described based on FIG.
The target flow file 292 includes a target flow record corresponding to one line in the figure.
The target flow record includes a target flow identifier, a target terminal identifier, and a target partner identifier. The target flow identifier identifies a target flow record.

The first target flow record whose target flow identifier is 1 includes IP _X1 that is the IP address of the first terminal device 111A as the target terminal identifier, and targets IP _Y1 that is the IP address of the first communication partner 121A. It is included as a partner identifier.

A functional configuration of the terminal-side relay device 300 will be described.
The terminal-side relay device 300 includes a load value acquisition unit 310, a line change command reception unit 320, a line change unit 330, and a relay setting file storage unit 390, as in FIG.
The function of the load value acquisition unit 310 is the same as that of the first embodiment.
The line change command receiving unit 320 receives a line change command including the target terminal identifier and the target partner identifier.
The line change unit 330 performs line change processing when a line change command is accepted. In this line change process, the line used for communication between the terminal device 111 identified by the target terminal identifier and the communication partner 121 identified by the target partner identifier is changed from the first line 101 to the second line 102. It is processing.
The relay setting file storage unit 390 stores the relay setting file 391 as in the first embodiment. However, the relay setting file 391 is different from the first embodiment as follows.

The relay setting file 391 will be described with reference to FIG.
The relay setting record provided in the relay setting file 391 includes a transmission destination address that is an IP address of the transmission destination in addition to the relay setting identifier, the transmission source address, and the output port number.
The first relay setting record includes IP _Y1 , which is the IP address of the first communication partner 121A, as the transmission destination address.
The second relay setting record includes IP _Y2 , which is the IP address of the second communication partner 121B, as the transmission destination address.

A functional configuration of the counterpart relay apparatus 400 will be described.
The counterpart relay apparatus 400 includes a line change command receiving unit 420, a line change unit 430, and a relay setting file storage unit 490, as in FIG. 5 in the first embodiment.
The line change command reception unit 420 receives a line change command including the target terminal identifier and the target partner identifier.
The line change unit 430 performs line change processing when a line change command is accepted. In this line change process, the line used for communication between the terminal device 111 identified by the target terminal identifier and the communication partner 121 identified by the target partner identifier is changed from the first line 101 to the second line 102. It is processing.
The relay setting file storage unit 490 stores the relay setting file 491 as in the first embodiment. However, the relay setting file 491 is different from the first embodiment as follows.

The relay setting file 491 will be described with reference to FIG.
The relay setting record included in the relay setting file 491 includes a transmission source address that is the IP address of the transmission source in addition to the relay setting identifier, the transmission destination address, and the output port number.
The first relay setting record includes IP _Y1 , which is the IP address of the first communication partner 121A, as the transmission source address.
The second relay setting record includes IP _Y2 , which is the IP address of the second communication partner 121B, as the transmission source address.

*** Explanation of operation ***
The processing flow of the communication control method is the same as the processing flow described with reference to FIG. 7 in the first embodiment. However, S140 and S150 differ from the first embodiment as follows.

In S140 and S150, the line change command includes IP _Y1 that is the target partner identifier in addition to IP _X1 that is the target terminal identifier.

In S150, the relay setting record selected from the relay setting file 391 in FIG. 11 includes IP _X1 included in the line change command as a transmission source address, and IP _Y1 included in the line change command as a transmission destination address. It is a first relay setting record.
Further, the relay setting record selected from the relay setting file 491 in FIG. 12 includes the IP _X1 included in the line change command as a transmission destination address and the IP _Y1 included in the line change command as a transmission source address. 1 relay setting record.

By the communication control method S150, the relay port number included in the first relay setting record is changed to 2 which is the port number of the second relay port 302 in FIG.
Therefore, when the packet relay unit 380 of the terminal-side relay device 300 receives a packet including IP _X1 as a transmission source address and IP _Y1 as a transmission destination address, the packet relay unit 380 transmits the received packet from the second relay port 302. To do. As a result, this packet is communicated using the second line 102.

By the communication control method S150, the relay port number included in the first relay setting record is changed to 2 which is the port number of the second relay port 402 in FIG.
Therefore, when receiving a packet including IP _X1 as the transmission destination address and IP _Y1 as the transmission source address, the packet relay unit 480 of the counterpart relay apparatus 400 transmits the received packet from the second relay port 402. To do. As a result, this packet is communicated using the second line 102.

*** Explanation of effects ***
The communication system 100 changes the line used for communication between the first terminal device 111A identified by the target terminal identifier and the first communication partner 121A identified by the target partner identifier from the first line 101 to the second terminal. The line 102 can be changed. That is, the line can be switched for each combination of the terminal device 111 and the communication partner 121.

Embodiment 3 FIG.
The line changing process described in the first and second embodiments changes the line used for communication using the target terminal port number and the target partner port number from the first line to the second line. The form in the case of being is demonstrated based on FIGS. 13-15.
Matters that are not described in the third embodiment are the same as those in the first and second embodiments.

*** Explanation of configuration ***
The configuration of the communication system 100 is the same as the configuration described in Embodiment 1 with reference to FIG.

As in FIG. 9 in the second embodiment, the communication control apparatus 200 includes a load value reception unit 210, a load determination unit 220, a line change command unit 230, and a target terminal identifier storage unit 290.
The functions of load value reception unit 210 and load determination unit 220 are the same as those in the first and second embodiments.
When it is determined that the load applied to the first line 101 is large, the line change command unit 230 outputs a line change command including the target terminal identifier, the target terminal port number, the target partner identifier, and the target partner port number to the terminal. It transmits to the side relay apparatus 300 and the other party relay apparatus 400.
The target terminal identifier storage unit 290 stores the target flow file 292 as in the second embodiment. However, the target flow file 292 is different from the second embodiment as follows.

The target flow file 292 will be described with reference to FIG.
The target flow record provided in the target flow file 292 includes a target terminal port number and a target partner port number in addition to the target flow identifier, the target terminal identifier, and the target partner identifier. The target terminal port number is a port number used by the terminal device 111 identified by the target terminal identifier. The target partner port number is a port number used by the communication partner 121 identified by the target partner identifier.
The first target flow record includes 80 as the target terminal port number and target partner port number.

A functional configuration of the terminal-side relay device 300 will be described.
The terminal-side relay device 300 includes a load value acquisition unit 310, a line change command reception unit 320, a line change unit 330, and a relay setting file storage unit 390, as in FIG.
The function of the load value acquisition unit 310 is the same as that of the first embodiment.
The line change command receiving unit 320 receives a line change command including a target terminal identifier, a target terminal port number, a target partner identifier, and a target partner port number.
The line change unit 330 performs line change processing when a line change command is accepted. This line change process is used for communication using the target terminal port number and the target partner port number among the communications between the terminal device 111 identified by the target terminal identifier and the communication partner 121 identified by the target partner identifier. In this process, the line to be changed is changed from the first line 101 to the second line 102.
The relay setting file storage unit 390 stores the relay setting file 391 as in the second embodiment. However, the relay setting file 391 differs from the second embodiment as follows.

The relay setting file 391 will be described with reference to FIG.
The relay setting record provided in the relay setting file 391 includes a transmission source port number and a transmission destination port number in addition to the relay setting identifier, the transmission source address, the transmission destination address, and the output port number.
The first relay setting record includes 80 as the transmission source port number and the transmission destination port number.
The second relay setting record includes 81 as the transmission source port number and the transmission destination port number.

A functional configuration of the counterpart relay apparatus 400 will be described.
The counterpart relay apparatus 400 includes a line change command receiving unit 420, a line change unit 430, and a relay setting file storage unit 490, as in FIG. 5 in the first embodiment.
The line change command receiving unit 420 receives a line change command including a target terminal identifier, a target terminal port number, a target partner identifier, and a target partner port number.
The line change unit 430 performs line change processing when a line change command is accepted. This line change process is used for communication using the target terminal port number and the target partner port number among the communications between the terminal device 111 identified by the target terminal identifier and the communication partner 121 identified by the target partner identifier. In this process, the line to be changed is changed from the first line 101 to the second line 102.
The relay setting file storage unit 490 stores the relay setting file 491 as in the second embodiment. However, the relay setting file 491 is different from the second embodiment as follows.

The relay setting file 491 will be described with reference to FIG.
The relay setting record included in the relay setting file 491 includes a transmission source port number and a transmission destination port number in addition to the relay setting identifier, transmission destination address, transmission source address, and output port number.
The first relay setting record includes 80 as the transmission source port number and the transmission destination port number.
The second relay setting record includes 81 as the transmission source port number and the transmission destination port number.

*** Explanation of operation ***
The processing flow of the communication control method is the same as the processing flow described with reference to FIG. 7 in the first embodiment. However, S140 and S150 differ from the first embodiment as follows.

In S140 and S150, the line change command includes the target terminal port number and the target partner port number 80 in addition to the target terminal identifier IP _X1 and the target partner identifier IP _Y1 . Here, the target terminal identifier, the target terminal port number, the target partner identifier, and the target partner port number included in the line change command are denoted as (IP _X1 , 80, IP _Y1 , 80).

In S150, the relay setting record selected from the relay setting file 391 in FIG. 14 includes (IP _X1 , 80, IP _Y1 , 80) included in the line change command as the transmission source address, transmission source port number, transmission destination address, and It is the 1st relay setting record included as a transmission destination port number.
Further, the relay setting record selected from the relay setting file 491 in FIG. 15 includes (IP _X1 , 80, IP _Y1 , 80) included in the line change command as the transmission destination address, transmission destination port number, transmission source address, and transmission. It is the 1st relay setting record included as a former port number.

Due to S150 of the communication control method, the relay port number included in the first relay setting record is changed to 2 which is the port number of the second relay port 302 in FIG.
Therefore, the packet relay unit 380 of the terminal-side relay device 300 includes IP _X1 as the source address, includes 80 as the source port number, includes IP _Y1 as the destination address, and includes 80 as the destination port number. When the packet is received, the received packet is transmitted from the second relay port 302. As a result, this packet is communicated using the second line 102.

Due to S150 of the communication control method, the relay port number included in the first relay setting record is changed to 2 which is the port number of the second relay port 402 in FIG.
Therefore, the packet relay unit 480 of the counterpart relay device 400 includes IP _X1 as the transmission destination address, includes 80 as the transmission destination port number, includes IP _Y1 as the transmission source address, and includes 80 as the transmission source port number. When the packet is received, the received packet is transmitted from the second relay port 402. As a result, this packet is communicated using the second line 102.

*** Explanation of effects ***
In the communication between the first terminal device 111A and the first communication partner 121A, the communication system 100 uses the first line 101 as a line used for communication using the target terminal port number and the target partner port number. To the second line 102. That is, the line can be switched for each combination of the terminal device 111, the port number of the terminal device 111, the communication partner 121, and the port number of the communication partner 121.

Embodiment 4 FIG.
FIG. 16 shows a mode in which a line used for communication of a terminal apparatus having a large amount of communication among a plurality of terminal apparatuses that perform communication using the first line is changed from the first line to the second line. This will be described with reference to FIG.
Matters that are not described in the fourth embodiment are the same as those in the first to third embodiments.

*** Explanation of configuration ***
The configuration of the communication system 100 is the same as the configuration described in Embodiment 1 with reference to FIG.

Based on FIG. 16, the functional configuration of the communication control apparatus 200 will be described.
The communication control apparatus 200 includes a communication amount receiving unit 240, a communication amount determining unit 250, and a line change command unit 230.
The communication amount receiving unit 240 receives the communication amount for each terminal device 111 that performs communication using the first line.
The communication amount determination unit 250 determines the terminal device 111 having a large communication amount by comparing the communication amount for each terminal device 111 with a communication amount threshold.
The line change command unit 230 transmits a line change command including a target terminal identifier for identifying the terminal device 111 having a large communication volume to the terminal-side relay device 300 and the partner-side relay device 400.

Based on FIG. 17, the functional configuration of the terminal-side relay device 300 will be described.
The terminal-side relay device 300 includes a communication amount acquisition unit 340, a line change command reception unit 320, a line change unit 330, a packet relay unit 380, and a packet relay unit 380.
The communication amount acquisition unit 340 acquires the communication amount for each terminal device 111 that performs communication using the first line 101.
The functions of the line change command receiving unit 320, the line change unit 330, the packet relay unit 380, and the relay setting file storage unit 390 are the same as those in the first embodiment.

  The functional configuration of counterpart relay apparatus 400 is the same as the functional configuration described in Embodiment 1 with reference to FIG.

*** Explanation of operation ***
Based on FIG. 18, the process of the communication control method will be described.

S210 is a communication amount acquisition process.
In S210, the communication amount acquisition unit 340 of the terminal-side relay device 300 acquires the communication amount for each terminal device 111. This communication amount is the data amount of the packet transmitted / received by the packet relay unit 380 via the first relay port 301. The amount of communication is also called bandwidth.
After S210, the process proceeds to S220.

S220 is a communication amount notification process and a communication amount reception process.
In S <b> 220, the communication amount acquisition unit 340 generates a communication amount notification that is a packet including the terminal identifier and the communication amount for each terminal device 111, and transmits the communication amount notification to the communication control device 200.
Then, the traffic volume receiving unit 240 of the communication control apparatus 200 receives the traffic volume notification.
After S220, the process proceeds to S230.

S230 is a traffic determination process.
In S230, the communication amount determination unit 250 of the communication control device 200 compares the communication amount for each terminal device 111 included in the communication amount notification with a communication amount threshold value.
Here, when the communication amount of the terminal device 111 is larger than the communication amount threshold, it can be determined that the communication amount of the terminal device 111 is large.
If the traffic volume is greater than the traffic threshold (YES), the process proceeds to S240.
When the traffic volume is equal to or smaller than the traffic volume threshold (NO), the processing of the communication control method ends.

S240 is a line change command process and a line change command reception process.
In S240, the line change command unit 230 of the communication control device 200 generates a line change command that is a packet including the terminal identifier of the terminal device 111 having a large communication amount as the target terminal identifier, and the line change command is transmitted to the terminal-side relay device 300. And transmitted to the counterpart relay device 400.
Then, the line change command accepting unit 320 of the terminal-side relay device 300 and the line change command accepting unit 420 of the counterpart relay device 400 receive the line change command.
In the second embodiment, the target terminal identifier included in the line change command is IP _X1 used as the IP address of the first terminal apparatus 111A.
After S240, the process proceeds to S250.

S250 is a line change process.
The contents of S250 are the same as the line change process of S150 in the first embodiment. That is, in FIG. 4, the relay port number included in the first relay setting record of the relay setting file 391 is changed to 2 that is the port number of the second relay port 302. In FIG. 6, the relay port number included in the first relay setting record of the relay setting file 491 is changed to 2, which is the port number of the second relay port 402.
After S250, the process of the communication control method ends.

*** Explanation of application examples ***
The line change process is a process for changing the line used for communication of a combination having a large communication volume among the combinations of the terminal device 111 and the communication partner 121 from the first line 101 to the second line 102. Also good. In this case, the fourth embodiment is as follows.
The communication amount acquisition unit 340 acquires the communication amount for each combination of the terminal device 111 and the communication partner 121. The communication amount notification includes, for each combination of the terminal device 111 and the communication partner 121, the terminal identifier of the terminal device 111, the partner identifier of the communication partner 121, and the communication amount.
The traffic determination unit 250 compares the traffic for each combination of the terminal device 111 and the communication partner 121 with a traffic threshold.
The line change command includes the target terminal identifier as a terminal identifier of a combination with a large amount of communication and includes a target partner identifier as a partner identifier of a combination with a large amount of communication.
The relay setting file 391 and the relay setting file 491 are the same as those in the second embodiment.
The operations of line changing unit 330 and line changing unit 430 are the same as those in the second embodiment.

Furthermore, the combination of the terminal device 111 and the communication partner 121 may be a combination of the terminal device 111, the communication partner 121, the terminal port number, and the partner port number. The terminal port number is a port number used by the terminal device 111, and the partner port number is a port number used by the communication partner 121. In this case, the fourth embodiment is as follows.
The communication amount acquisition unit 340 acquires the communication amount for each combination of the terminal device 111, the communication partner 121, the terminal port number, and the partner port number. The communication amount notification includes a terminal identifier, a partner identifier, a terminal port number, a partner port number, and a communication amount for each combination of the terminal device 111, the communication partner 121, the terminal port number, and the partner port number.
The traffic determination unit 250 compares the traffic for each combination of the terminal device 111, the communication partner 121, the terminal port number, and the partner port number with a traffic threshold.
The line change command includes a target terminal identifier, a target partner identifier, a target terminal port number, and a target partner port number as a combination of a terminal identifier, a partner identifier, a terminal port number, and a partner port number having a large communication amount.
The relay setting file 391 and the relay setting file 491 are the same as those in the third embodiment.
The operations of line changing unit 330 and line changing unit 430 are the same as those in the third embodiment.

*** Explanation of effects ***
The communication system 100 uses a first line 101 to a second line that is used for communication of a terminal apparatus 111 having a large communication volume among a plurality of terminal apparatuses 111 that perform communication using the first line 101. The line 102 can be changed.
That is, the line can be switched for each terminal device 111. Furthermore, the line can be switched for each combination of the terminal device 111 and the communication partner 121 or for each combination of the port number of the terminal device 111 and the terminal device 111 and the port number of the communication partner 121 and the communication partner 121.

In each embodiment, the communication system 100 may be a system such as the following (1) to (3).
(1) When the terminal-side relay device 300 or the counterpart-side relay device 400 includes the functional configuration of the communication control device 200, the communication system 100 may not include the communication control device 200.
(2) When the communication system 100 includes a load value acquisition device that acquires the load value of the first line 101, the terminal-side relay device 300 may not include the load value acquisition unit 310.
(3) The load value may be any one or two of a communication amount, a response time, and a packet loss amount. The load value may be another value. For example, the load value may be a value calculated using a communication amount, a response time, and a packet loss amount.

A configuration example of the communication system 100 will be described based on FIG. In each embodiment, the configuration of the communication system 100 may be as shown in FIG.
The communication system 100 includes a terminal-side representative relay device 130, a first terminal-side relay device 131, a second terminal-side relay device 132, a partner-side representative relay device 140, a first partner-side relay device 141, and a second partner. A side relay device 142 is provided.
The terminal-side representative relay device 130 is the same as the terminal-side relay device 300, and the counterpart-side representative relay device 140 is the same as the counterpart-side relay device 400.
The first terminal-side relay device 131 is connected to the first line 101, and the terminal-side representative relay device 130 is connected to the first line 101 via the first terminal-side relay device 131.
The second terminal side relay device 132 is connected to the second line 102, and the terminal side representative relay device 130 is connected to the second line 102 via the second terminal side relay device 132.
The first counterpart relay device 141 is connected to the first line 101, and the counterpart representative relay device 140 is connected to the second line 102 via the first counterpart relay device 141.
The second partner relay device 142 is connected to the second line 102, and the partner representative relay device 140 is connected to the second line 102 via the second partner relay device 142.
The communication system 100 does not include at least one of the first terminal-side relay device 131, the second terminal-side relay device 132, the first partner-side relay device 141, and the second partner-side relay device 142. May be.

  In each embodiment, “to part” can be read as “to process”, “to process”, “to program”, and “to apparatus”.

  100 communication system, 101 first line, 102 second line, 111 terminal device, 119 terminal network, 121 communication partner, 129 partner network, 130 terminal side representative relay device, 131 first terminal side relay device, 132 2 terminal-side relay device, 140 partner-side representative relay device, 141 first partner-side relay device, 142 second partner-side relay device, 200 communication control device, 210 load value receiving unit, 220 load determining unit, 230 line Change command unit, 240 communication amount reception unit, 250 communication amount determination unit, 290 target terminal identifier storage unit, 291 target terminal identifier, 292 target flow file, 300 terminal side relay device, 301 first relay port, 302 second Relay port, 303 Third relay port, 310 Load value acquisition unit, 320 Line change command Appendix, 330 Line change unit, 340 Traffic volume acquisition unit, 380 Packet relay unit, 390 Relay setting file storage unit, 391 Relay setting file, 400 Counterpart relay device, 401 First relay port, 402 Second relay port 403 Third relay port 420 Line change command accepting unit 430 Line change unit 480 Packet relay unit 490 Relay setting file storage unit 491 Relay setting file 901 Arithmetic unit 902 Auxiliary storage unit 903 Main storage unit , 904 communication device, 905 input / output device, 909 bus.

Claims (8)

A target terminal identifier storage unit that stores a target terminal identifier for identifying any one of the plurality of terminal devices that perform communication using the first line;
A load value acquisition unit that acquires a load value indicating a load applied to the first line;
A load determination unit that determines whether the load applied to the first line is large by comparing the load value with a load threshold;
Line change processing for changing a line used for communication of the terminal device identified by the target terminal identifier from the first line to the second line when it is determined that the load on the first line is large A communication system comprising a line changing unit for performing The target terminal identifier storage unit stores a target partner identifier for identifying any one of a plurality of communication partners communicating with a terminal device identified by the target terminal identifier;
In the line change process, a line used for communication between a terminal device identified by the target terminal identifier and a communication partner identified by the target partner identifier is changed from the first line to the second line. The communication system according to claim 1, wherein the communication system performs processing. The target terminal identifier storage unit includes a target terminal port number that is a port number used by a terminal device identified by the target terminal identifier and a target partner that is a port number used by a communication partner identified by the target partner identifier. Remember the port number,
In the communication between the terminal device identified by the target terminal identifier and the communication partner identified by the target partner identifier, the line change process uses the target terminal port number and the target partner port number. The communication system according to claim 2, wherein the communication line is a process of changing the line used for the first line to the second line. A target terminal identifier storage unit stores a target terminal identifier for identifying any one of a plurality of terminal devices that perform communication using the first line;
A load value acquisition unit acquires a load value indicating a load applied to the first line;
The load determination unit determines whether the load applied to the first line is large by comparing the load value with a load threshold,
When the line changing unit determines that the load on the first line is large, the line used for communication of the terminal device identified by the target terminal identifier is changed from the first line to the second line. A communication control method for performing line change processing to be changed. A communication amount acquisition unit that acquires a communication amount for each terminal device that performs communication using the first line;
A communication amount determination unit that determines a terminal device with a large communication amount by comparing the communication amount for each terminal device with a communication amount threshold;
A communication system comprising: a line change unit that performs a line change process for changing a line used for communication of a terminal device having a large communication amount from the first line to the second line. The communication amount acquisition unit acquires a communication amount for each combination of a terminal device and a communication partner,
The communication amount determination unit determines a combination having a large amount of communication among combinations of the terminal device and the communication partner by comparing the communication amount for each combination of the terminal device and the communication partner with a communication amount threshold,
The communication system according to claim 5, wherein the line change process is a process of changing a line used for a combination communication having a large communication amount from the first line to the second line. The communication amount acquisition unit acquires a communication amount for each combination of a terminal port number that is a port number used by a terminal device, a communication partner and a terminal device, and a partner port number that is a port number used by the communication partner,
The communication amount determination unit compares the communication amount for each combination of the terminal device, the communication partner, the terminal port number, and the partner port number with a communication amount threshold value, thereby determining the terminal device, the communication partner, the terminal port number, and the partner port number. The communication system according to claim 6, wherein a combination with a large amount of communication is determined among the combinations. The traffic volume acquisition unit acquires the traffic volume of each terminal device that performs communication using the first line,
The traffic volume determination unit determines a terminal device with a large traffic volume by comparing the traffic volume of each terminal device with a traffic volume threshold,
A communication control method for performing a line change process in which a line change unit changes a line used for communication of a terminal device having a large amount of communication from the first line to the second line.

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