WO2015162753A1

WO2015162753A1 - Band control apparatus, network system, band control method, and computer readable nontemporary storage medium

Info

Publication number: WO2015162753A1
Application number: PCT/JP2014/061563
Authority: WO
Inventors: 英也吉内
Original assignee: 株式会社日立製作所
Priority date: 2014-04-24
Filing date: 2014-04-24
Publication date: 2015-10-29

Abstract

A band control apparatus for controlling a band used by a communication session is characterized by: holding, for the communication session, a transmission source address, a destination address, transmission source port identification information, destination port identification information, and band control information including a band value allocated to the communication session; if the communication session is established, executing a first band measurement process to measure, for a first time, the band used by the established communication session; if it is determined that the band measured in the first band measurement process is of a given value, executing a related band control information determination process to determine, on the basis of the band measured in the first band measurement process, whether the band control information related to the established communication session is held; and, if it is determined that the band control information related to the established communication session is not held, executing a second band measurement process to measure, for a second time longer than the first time, the band used by the established communication session.

Description

Band control device, network system, band control method, and computer-readable non-transitory storage medium

The present invention relates to a bandwidth control device that controls a bandwidth used by a communication session.

In communication between a plurality of bases connected via a wide area network, there are problems of packet delay and packet discard rate, and a decrease in communication efficiency due to these. As a technique for solving such a problem, a technique has been proposed in which a communication speed-up device for speeding up communication in a wide area network is arranged at each base to speed up communication between the bases. A plurality of methods are known as methods for speeding up communication by the communication speed-up device. For example, a method is known in which a communication speed-up device includes a cache and speeds up communication by shortening the time for accessing a file stored in the cache. Also known is a method of speeding up communication by reducing the time required for data transfer using TCP / IP (Transmission Control Protocol / Internet Protocol), which is one of the basic protocols of the network. Also known is a method for speeding up communication by specializing in a specific communication protocol such as HTTP (Hypertext Transfer Protocol) or CIFS (Common Internet File System).

利用 Appropriate bandwidth control is required to use a communication speedup device. The communication speed-up device controls the bandwidth of the service used by the user. There are two types of communication methods for services used by users: bulk data communication and fixed-band communication. Bulk data communication is a method in which data is communicated using all available bands. A service using bulk data communication is, for example, a file transfer service based on FTP or HTTP. In addition, fixed band communication is a method in which data is communicated using a certain band regardless of the availability of the communication path. A service that uses fixed-band communication is, for example, a streaming service (for example, a video conference service and a video service).

In order for the communication speed-up device to control the bandwidth of each service, the bandwidth control parameter for each service needs to be appropriately set in the communication speed-up device according to the usage status of each service. For services that use bulk data communication, the allocation ratio of the bandwidth that can be used for the service needs to be set as a bandwidth control parameter in the communication speed-up device, and for services that use a fixed bandwidth, the bandwidth used by the communication session The value needs to be set in the communication speed increasing device as a bandwidth control parameter. It is difficult for the bandwidth control parameters of all services used by the user to be set in the communication speed increasing device when the communication speed increasing device is introduced. Therefore, the bandwidth control parameter needs to be set appropriately according to the actual service usage status.

There is JP-A-2005-176354 (Patent Document 1) as a technique for solving this problem. This publication provides: “A method for estimating traffic contract parameters in a TM network. The method includes generating data relating to ATM cell packet arrival times of a number of cells received during a predetermined period of time; Determining SCR parameters; determining PCR parameters; generating PCR leaky bucket data and SCR leaky bucket data; determining CDVT parameters using PCR leaky bucket data; and SCR Using leaky bucket data to determine MBS parameters. "(See summary).

JP 2005-176354 A

In the method described in Patent Document 1, a communication session is monitored, a communication quality parameter is estimated, and the estimated bandwidth is assigned to a communication session using a fixed bandwidth.

However, whether or not the bandwidth used by the communication session is a fixed bandwidth needs to be monitored for a certain period of time. Processing for monitoring a communication session has a large processing load. For this reason, in a communication speedup apparatus that monitors many communication sessions, many computer resources are allocated to the communication session monitoring process, and the performance of the communication speedup apparatus deteriorates.

The present invention provides a bandwidth control device that controls bandwidth according to actual usage conditions and improves bandwidth utilization efficiency while reducing computer resources necessary for monitoring a communication session.

In order to solve the above-described problem, the present invention provides a bandwidth control device that controls a bandwidth used by a communication session, wherein the communication session is transmitted from a transmission source computer of an internal network in which the bandwidth control device is arranged. Used for data communication to a destination computer of another internal network connected to the internal network via the external network, the source address of the communication session, the destination address, the source port identification information, the destination port identification information, and A storage unit that holds bandwidth control information including a bandwidth value to be allocated to the communication session, and a first band that measures a band used by the established communication session for a first time when the communication session is established A measurement process is executed, and it is determined that the fluctuation of the band measured in the first band measurement process is within a predetermined range. If the bandwidth control information related to the established communication session is held in the storage unit based on the bandwidth value of the bandwidth control information and the bandwidth measured in the first bandwidth measurement process. When the related bandwidth control information determination process is performed and it is determined that the bandwidth control information related to the established communication session is not held in the storage unit, the established communication session uses A second band measurement process for measuring the band for a second time longer than the first time is executed, and the fluctuation of the band measured in the first band measurement process or the second band measurement process is within a predetermined range. If it is determined that it is not, the bandwidth used by the established communication session is controlled by a predetermined method, and it is determined that the fluctuation of the bandwidth measured in the second bandwidth measurement processing is within a predetermined range. When, based on the bandwidth that is measured by the second bandwidth measurement processing, characterized in that it comprises a control unit for controlling the bandwidth communication session uses are the established.

According to the present invention, it is possible to provide a bandwidth control device that controls bandwidth according to actual usage conditions and improves bandwidth utilization efficiency while reducing computer resources necessary for monitoring a communication session.

Issues, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

It is explanatory drawing of the communication system of Example 1. FIG. 1 is a hardware configuration diagram of a communication speed-up device of Embodiment 1. FIG. It is explanatory drawing of apparatus basic information DB of Example 1. FIG. It is explanatory drawing of session information DB of Example 1. FIG. It is explanatory drawing of band control information DB of Example 1. FIG. It is explanatory drawing of the band control log | history information DB of Example 1. FIG. FIG. 6 is a sequence diagram of bandwidth control processing executed by the communication speed increasing apparatus according to the first embodiment. It is explanatory drawing of the format of the data communication start message of Example 1. FIG. 3 is a flowchart of bandwidth control processing by the communication speed increasing apparatus according to the first embodiment. 3 is a flowchart of an initial band measurement process according to the first embodiment. 6 is a flowchart of bandwidth control information history update processing according to the first embodiment. It is explanatory drawing of an example of the band control log | history information DB before the update of Example 1. FIG. It is explanatory drawing of an example of the zone | band control log | history information DB after the update of Example 1. FIG. It is explanatory drawing of an example of the band control log | history information DB before the update of Example 1. FIG. It is explanatory drawing of the communication system of Example 2. FIG. 6 is a hardware configuration diagram of a bandwidth control server according to Embodiment 2. FIG. It is explanatory drawing of band control information DB of Example 2. FIG. It is explanatory drawing of band control log | history information DB of Example 2. FIG. FIG. 12 is a sequence diagram of bandwidth control history information collection processing by the bandwidth control server according to the second embodiment. It is explanatory drawing of the band control log | history information message of Example 2. FIG. It is explanatory drawing of the band control information message of Example 2. FIG. It is a flowchart of the relevance determination process of Example 2. 10 is a flowchart of address common determination processing according to the second embodiment. It is explanatory drawing of an example of the zone | band control log | history information DB of Example 2. FIG. It is explanatory drawing of an example of the zone | band control log | history information DB of Example 2. FIG. It is explanatory drawing of the band control information display screen of Example 3. FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. Moreover, in each drawing, the same code | symbol is attached | subjected to the same element and the duplication description is abbreviate | omitted as needed for clarification of description.

Hereinafter, Example 1 will be described with reference to FIGS.

FIG. 1 is an explanatory diagram of a communication system according to the first embodiment. The communication system includes bases 6A to 6N (the bases are collectively referred to as bases 6), and the bases 6 are connected to each other via the network 4. For example, the communication speed increasing device 2A, the computer 3A, and the computer 3B are disposed at the base 6A, the communication speed increasing device 2B, the computer 3C, and the computer 3D are disposed at the base 6B, and the communication speed increasing device 2C, A computer 3D and a computer 3E are arranged, and a communication speed increasing device 2N, a computer 3G, and a computer 3H are arranged at the base 6N. The communication speed-up devices 2A to 2N at each site 6 are collectively referred to as the communication speed-up device 2, and the computers 3A to 3H at each site 6 are collectively referred to as the computer 3.

The communication speed increasing device 2 is connected to the network 4 and controls the bandwidth of the communication session between the computer 3 at the base 6 where the communication speed increasing device 2 is located and the computer 3 at the base 6 connected via the network 4. To speed up communications. The communication speed-up device 2 does not have to have a function of speeding up communication over the network 4 as long as it controls the bandwidth of the communication session, and is referred to as a bandwidth control device in the claims. Details of the communication speed-up device 2 will be described with reference to FIG. In the network 4, data is communicated within a predetermined band range. The computer 3 is, for example, a computer such as a terminal or a server, and communicates with computers at other bases 6.

The number of bases 6 included in the communication system and the number of computers 3 included in each base 6 are not limited to FIG. It is sufficient that at least one communication speed-up device 2 and at least one computer 3 are arranged at the base 6.

FIG. 2 is a hardware configuration diagram of the communication speed-up device 2 according to the first embodiment. The communication speed-up device 2 includes network interfaces A20A and B20B, a control unit (CPU) 21, an external storage device 22, and an internal storage device 26. These are connected to each other via a bus 28.

The network interface A 20A is connected to the network 4, and the network interface B 20B is connected to the computer 3.

The internal storage device 26 is, for example, a memory, and the internal storage device 26 includes a communication speed-up program 261, a bandwidth control program 262, a device basic information database (DB) 263, a session information DB 265, a bandwidth control information DB 267, and bandwidth control. A history information DB 269 is stored.

The communication speed increasing program 261 is a program for causing the control unit 21 to execute processing for speeding up communication. The bandwidth control program 262 is a program that causes the control unit 21 to execute processing for controlling bandwidth (bandwidth control processing). Information related to the communication speed-up device 2 is registered in the device basic information DB 263. Details of the device basic information DB 263 will be described with reference to FIG. In the session information DB 265, information related to a communication session between the computers 3 that communicate data is registered. Details of the session information DB 265 will be described with reference to FIG. Information related to bandwidth control processing (bandwidth control information) is registered in the bandwidth control information DB 267. Details of the bandwidth control information DB 267 will be described in detail with reference to FIG. In the bandwidth control history information DB 269, information related to the actually measured bandwidth of the communication session is registered. Details of the bandwidth control history information DB 269 will be described with reference to FIG.

The control unit 21 executes a communication speeding up program 261 and a bandwidth control program 262 stored in the internal storage device 26. The external storage device 22 is, for example, an HDD (Hard Disk Disk Drive) or the like. Various databases stored in the internal storage device 26 may be stored in the external storage device 22 according to the scale of the base 6 where the communication speed-up device 2 is arranged, the processing performance of the communication speed-up device 2, or the like. .

FIG. 3 is an explanatory diagram of the device basic information DB 263 according to the first embodiment.

The device basic information DB 263 is a database that manages basic information of the communication speed-up device 2 that holds the device basic information DB 263. The device basic information DB 263 includes device identification information 301, device address 302, device bandwidth 303, initial bandwidth measurement time 304, fixed bandwidth measurement time 305, bandwidth measurement cycle 306, and fixed bandwidth dispersion threshold 307.

In the device identification information 301, the identification information of the communication speed increasing device 2 is registered. In the device address 302, the management address of the communication speed-up device 2 is registered. In the device band 303, a band that can be used by the communication speed-up device 2 is registered. In the initial bandwidth measurement time 304, an initial bandwidth measurement time for first measuring the bandwidth of the communication session in the bandwidth control processing shown in FIG. 8 is registered. Note that the bandwidth measured by the initial bandwidth measurement time is used to determine whether the communication session is bulk data communication or not.

In the fixed bandwidth measurement time 305, the fixed bandwidth measurement time for measuring in detail the bandwidth of a communication session that is not bulk data communication is registered in the bandwidth control information update process shown in FIG. The bandwidth measured in detail is used to determine whether the communication session is fixed bandwidth communication. In the bandwidth measurement cycle 306, a cycle in which the communication speed-up device 2 acquires the bandwidth of the communication session during the initial bandwidth measurement time or the fixed bandwidth measurement time is registered. In the fixed bandwidth distribution threshold 307, a threshold for determining whether or not the bandwidth used by the communication session is a fixed value is registered.

FIG. 4 is an explanatory diagram of the session information DB 265 of the first embodiment.

The session information DB 265 is a database that manages information related to a communication session that passes through the communication speed-up device 2. The session information DB 265 includes session identification information 401, an external address 402, an internal address 403, an external port number 404, an internal port number 405, and a communication band 406.

In the session identification information 401, communication session identification information is registered. In the external address 402, the address of the computer 3 on the external network of the communication speed increasing device 2 is registered. In the internal address 403, the address of the computer 3 in the internal network of the communication speed increasing device 2 is registered. In the external port number 404, the port number of the computer 3 of the external network of the communication speed increasing device 2 is registered. In the internal port number 405, the port number of the computer 3 in the internal network of the communication speed increasing device 2 is registered. In the communication band 406, a band assigned to the communication session is registered.

External network and internal network will be described with reference to FIG. A case where data is transmitted from the computer 3A at the base 6A to the computer 3C at the base 6B will be described as an example. A communication session is established in the direction from the computer 3A to the computer 3B. The communication speedup device 2A speeds up communication from the communication speedup device 2A to the communication speedup device 2B. The communication speed increasing device 2A regards the base 6A as an internal network and regards the base 6B connected via the network 4 as an external network. For this reason, in the communication speed-up device 2A, the address of the computer 3A is regarded as an internal address, and the port number of the computer 3A is regarded as an internal port number. Further, in the communication speed-up device 2B, the address of the computer 3B is regarded as an external address, and the port number of the computer 3B is regarded as an external port number. On the other hand, the communication speed increasing device 2B regards the base 6B as an internal network and regards the base 6A as an external network.

FIG. 5 is an explanatory diagram of the bandwidth control information DB 267 according to the first embodiment.

The bandwidth control information DB 267 is a database that manages information related to bandwidth control processing for communication sessions. The bandwidth control information DB 267 includes bandwidth control information identification information 501, external address 502, internal address 503, external port number 504, internal port number 505, bandwidth control method 506, bandwidth control setting value 507, and related history information 508.

In the bandwidth control information identification information 501, identification information of bandwidth control information is registered. In the external address 502, the address of the computer 3 in the external network of the communication session to which the bandwidth control information is applied is registered. In the internal address 503, the address of the computer 3 in the internal network of the communication session to which the bandwidth control information is applied is registered. In the external port number 504, the port number of the computer 3 of the external network of the communication session to which the bandwidth control information is applied is registered. In the internal port number 505, the port number of the computer 3 in the internal network of the communication session to which the bandwidth control information is applied is registered.

In the bandwidth control method 506, information indicating a bandwidth control method performed for the communication session is registered. In general, there are two types of data communication, bulk data communication or fixed band communication. Bulk data communication is a communication method represented by file transfer using FTP (File （Transfer Protocol) or HTTP, and communicates data using the largest possible band. In fixed band communication, data is communicated using a certain band regardless of network conditions, such as video stream distribution. Therefore, information indicating whether the bandwidth control method performed for the communication session is a method for bulk data communication or a method for fixed bandwidth communication is registered in the bandwidth control method 506. .

In the bandwidth control setting value 507, a bandwidth allocation ratio is registered in a communication session in which bandwidth control for bulk data communication is performed, and a maximum bandwidth is registered in a communication session in which bandwidth control for fixed bandwidth communication is performed. In bulk data communication, a communication session uses all available bandwidth, and data is communicated. For this reason, when a plurality of communication sessions for bulk data communication pass through one communication speed-up device 2, the communication sessions contend for the available bandwidth of the communication speed-up device 2. In order to prevent this, a bandwidth allocation ratio is registered in the bandwidth control setting value 507 of the communication session for bulk data communication. Since the bandwidth allocation ratio with respect to all the bands that can be used by the communication speed-up device 2 is set for the communication session of bulk data communication, the bandwidth that can be used by the communication speed-up device 2 is determined according to the bandwidth allocation ratio. Assigned to other communication sessions.

On the other hand, in fixed band communication, the band used by the communication session is a fixed value. For this reason, the maximum bandwidth is registered in the bandwidth control setting value 507 of the communication session for fixed bandwidth communication, and the bandwidth is excessively allocated to the communication session by setting the maximum bandwidth for each communication session for fixed bandwidth communication. Can be prevented.

The bandwidth control information DB 267 may be set manually by an administrator when the system is started, or may be automatically set based on a communication history. In the related history information 508, information that can specify related bandwidth control history information when registered automatically is registered.

FIG. 6 is an explanatory diagram of the bandwidth control history information DB 269 according to the first embodiment.

When the bandwidth of the established communication session is measured by the detailed bandwidth measurement process, the communication speedup device 2 registers the bandwidth control history information including the bandwidth of the communication session in the bandwidth control history information DB 269.

The bandwidth control history information DB 269 includes history information identification information 601, an external address 602, an internal address 603, an external port number 604, an internal port number 605, a used bandwidth 606, a detection count 607, a registration date and time 609, and an expiration date 610.

In the history information identification information 601, identification information of band control history information is registered. Registered in the external address 502 is the address of the computer 3 in the external network of the communication session whose bandwidth has been measured in the detailed bandwidth measurement process. Registered in the internal address 603 is the address of the computer 3 in the internal network of the communication session whose bandwidth has been measured in the detailed bandwidth measurement process. Registered in the external port number 604 is the port number of the computer 3 in the external network of the communication session whose bandwidth has been measured in the detailed bandwidth measurement process. Registered in the internal port number 605 is the port number of the computer 3 in the internal network of the communication session whose bandwidth has been measured in the detailed bandwidth measurement process.

In the use band 606, the value of the band measured in the detailed band measurement process is registered. In the detection count 607, the detected count of the communication session is registered. In the detection frequency threshold 608, a threshold for the detection frequency for registering the bandwidth control history information of the communication session as bandwidth control information in the bandwidth control information DB 267 is registered. In the registration date / time 609, date / time information in which history information is registered in the bandwidth control history information DB 269 is registered. In the expiration date 610, time limit information for deleting the bandwidth control history information from the bandwidth control history information DB 269 is registered.

FIG. 7 is a sequence diagram of bandwidth control processing executed by the communication speed increasing device 2 according to the first embodiment. Although FIG. 7 illustrates an example in which data is transmitted from the computer 3A at the base 6A to the computer 3C at the base 6B, the present invention is not limited to this.

First, the communication speed increasing device 2A receives a data communication start message from the computer 3A arranged at the same base 6A (S101). The data communication start message will be described with reference to FIG. FIG. 8 is an explanatory diagram of a format of a data communication start message according to the first embodiment.

The data communication start message includes a source address 801, a destination address 802, a packet type 803, a source port number 804, and a destination port number 805.

In the transmission source address 801, the address of the computer 3A that transmitted the data communication start message is registered. In the destination address 802, the address of the computer 3C that is the destination of the data communication start message is registered. In the packet type 803, information indicating that it is a data communication start message is registered. In the transmission source port number 804, the identification information of the port that transmitted the data communication start message of the computer 3A that transmitted the data communication start message is registered. In the destination port number 805, the identification information of the destination port of the data communication start message of the computer 3C that is the destination of the data communication start message is registered.

The data communication start message is, for example, a SYN packet that is a TCP session establishment message. The communication speed increasing device 2A transmits the received data communication start message to the computer 3C via the communication speed increasing device 2B, and the computer 3C transmits a response message corresponding to the data communication start message to the computer 3A. When a response message is received, a response message to the response message is transmitted to the computer 3C to establish a communication session between the computer 3A and the computer 3C, and data communication is performed between the computer 3A and the computer 3C. It becomes possible (S104). A communication session may be established when the computer 3A receives a response message from the computer 3C.

Further, when receiving the data communication start message, the communication speed increasing device 2A determines whether or not the bandwidth control information corresponding to the communication session established by the received data communication start message is registered in the bandwidth control information DB 267. (S102). In this case, the communication speed increasing device 2A uses the address of the computer 3A registered in the transmission source address 801 of the data communication start message as an internal address, and uses the address of the computer 3C registered in the destination address 802 of the data communication start message as an external address. The identification information of the port of the computer 3A registered in the transmission port number 804 of the data communication start message as the internal port number and the identification information of the port of the computer 3C registered in the destination port number 805 of the data communication start message Is searched for the bandwidth control information DB 267. Specifically, the communication speed increasing device 2A registers the address of the computer 3C registered in the destination address 802 of the received data communication start message in the external address 502 of the bandwidth control information DB 267, and receives it in the internal address 503. The address of the computer 3A registered in the transmission source address 801 of the received data communication start message is registered, and the identification information of the port of the computer 3C registered in the destination port number 805 of the received data communication start message is registered in the external port number 504 Is registered in the bandwidth control information DB 267 in the internal port number 505, and the identification information of the port of the computer 3A registered in the transmission source port number 804 of the received data communication start message is registered. Determine whether.

FIG. 7 illustrates a case where it is determined in the process of S102 that the bandwidth control information of the communication session established by the received data communication start message is not registered in the bandwidth control information DB 267. When the bandwidth control information of the communication session is not registered in the bandwidth control information DB 267, the communication speedup device 2A cannot grasp how to control the bandwidth of the communication session, and the communication session is not bulk data communication. Or whether it is fixed band communication. For this reason, the communication speed increasing device 2A starts monitoring the communication session in order to measure the use band of the communication session used for determining whether or not the established communication session is bulk data communication (S103). .

Specifically, in the communication speedup device 2A, the identification information of the communication speedup device 2A is registered in the device identification information 301 of the device basic information DB 263, and the address of the communication speedup device 2A is registered in the device address 302. The initial bandwidth measurement time registered in the initial bandwidth measurement time 304 of the record is acquired. Then, the communication speed increasing device 2A monitors the established communication session during the acquired initial bandwidth measurement time. During the monitoring of the communication session, the communication speed increasing device 2A measures the band used by the communication session at the period registered in the band measurement period 306 of the record.

Next, the communication speed increasing device 2A determines whether or not the communication session is bulk data communication based on the measurement result of the communication session in the process of S103, that is, the band used by the communication session (S105). If the bandwidth used by the communication session is a constant value, the communication acceleration device 2A determines that the communication session is likely to be fixed-band communication, and if the bandwidth used by the communication session is not a constant value, It is determined that the communication session is bulk data communication.

For example, the communication speedup device 2A calculates the average and variance of the bandwidth used by the communication session, and determines whether the calculated variance is equal to or less than a predetermined value. The communication speed increasing device 2A determines that the bandwidth used by the communication session is a constant value if the variance is less than or equal to a predetermined value, and if the variance is greater than the predetermined value, the bandwidth used by the communication session is not a constant value. judge.

As another example of determining whether or not the bandwidth used by the communication session is a constant value, the communication speedup device 2A determines whether or not the bandwidth used by the communication session is within a predetermined range from the constant value. Determine. The communication speed increasing device 2A determines that the bandwidth used by the communication session is a constant value if the bandwidth used by the communication session is within a predetermined range from the constant value, and the bandwidth used by the communication session is determined from the constant value. If it is outside the predetermined range, it is determined that the bandwidth used by the communication session is not a constant value.

In FIG. 7, in the process of S105, it is determined that the bandwidth used by the communication session is a constant value, and there is a high possibility that the communication session is fixed-band communication. During a long fixed bandwidth measurement time, the bandwidth of the communication session is measured, and it is determined whether or not the communication session is fixed bandwidth communication. Specifically, the communication speed increasing device 2A measures the bandwidth used by the communication session during the fixed bandwidth measurement time, and determines that the communication session is fixed bandwidth communication when the bandwidth is a constant value. Based on the measurement result, the bandwidth control history information DB 269 is updated (S106).

First, the communication speedup device 2A has a record in which the identification information of the communication speedup device 2A is registered in the device identification information 301 of the device basic information DB 263 and the address of the communication speedup device 2A is registered in the device address 302. The fixed bandwidth measurement time registered in the fixed bandwidth measurement time 305, the cycle registered in the bandwidth measurement cycle 306, and the threshold registered in the fixed bandwidth dispersion threshold 307 are acquired.

Then, the communication speed-up device 2A acquires the bandwidth used by the communication session in the acquired cycle during the acquired fixed bandwidth measurement time. Next, the communication speed increasing device 2A determines whether or not the acquired bandwidth is a constant value. Specifically, similarly to the process of S105, the communication speedup apparatus 2A calculates the average and variance of the acquired bandwidth, and determines whether or not the calculated variance is equal to or less than the acquired threshold value. The communication speed increasing device 2A determines that the obtained bandwidth is a constant value if the calculated variance is equal to or less than the threshold value, that is, the communication session is fixed bandwidth communication. The determined bandwidth is not a constant value, that is, the communication session is determined to be bulk data communication. When it is determined that the communication session is fixed band communication, the communication speedup device 2A updates the band control history information DB 269 based on the acquired band.

When the number registered in the detection count 607 of the bandwidth control history information DB 269 is equal to or greater than the threshold registered in the detection count threshold 608, the bandwidth control history information registered in the bandwidth control history information DB 269 is used as the bandwidth control information. Register in the bandwidth control information DB 267. As a result, when the same or similar bandwidth control history information is detected many times, the communication speed-up device 2 assumes that there is a communication session using a certain bandwidth between the two bases 6, and thereafter the communication session Bandwidth measurement processing is simplified and bandwidth control is performed using bandwidth control information.

FIG. 9 is a flowchart of the bandwidth control process performed by the communication speed-up device 2 according to the first embodiment. The bandwidth control process is executed when the control unit 21 of the communication speed increasing device 2 executes the bandwidth control program 262.

First, the communication speed-up device 2 receives a data communication start message from the computers 3 arranged at the same base 6 (F101). The process of F101 corresponds to the process of S101 illustrated in FIG. As described in the processing of S104 shown in FIG. 7, when the communication speed increasing device 2 receives a predetermined response, a communication session is established between the computer 3 that is the transmission source of the data communication start message and the computer 3 that is the destination. Established and data communication is started.

Next, the communication speed-up device 2 determines whether or not the bandwidth control information corresponding to the communication session established by the received data communication start message is registered in the bandwidth control information DB 267 (F102). Since the details of the processing of F102 have been described in the processing of S102 shown in FIG. 7, detailed description thereof is omitted.

When it is determined in the processing of F102 that the bandwidth control information corresponding to the established communication session is registered in the bandwidth control information DB 267, the communication speedup device 2 determines based on the bandwidth control information corresponding to the communication session. Bandwidth control is performed (F103), and the bandwidth control process is terminated.

On the other hand, when it is determined in the processing of F102 that the bandwidth control information corresponding to the established communication session is not registered in the bandwidth control information DB 267, the communication speedup device 2 determines that the established communication session is a bulk data communication In order to determine whether or not, an initial bandwidth measurement process for measuring the bandwidth used by the established communication session is executed (F104). The initial bandwidth measurement process will be described in detail with reference to FIG. The time for measuring the bandwidth in the initial bandwidth measurement processing (initial bandwidth measurement time) is set to a value shorter than the time for measuring the bandwidth in the detailed bandwidth measurement processing executed in the processing of F110 (fixed bandwidth measurement time). . A band measured by the initial band measurement process is referred to as an initial band.

Next, the communication speed-up device 2 determines whether or not the initial bandwidth measured in the process of F104 is a constant value (F105). Specifically, the communication speed increasing device 2 determines whether or not the fluctuation of the initial band measured in the process of F104 is within a predetermined range.

In the process of F105, when it is determined that the initial bandwidth measured in the process of F104 is not a constant value, the communication session to be established is bulk data communication, and there is no bandwidth control information for the communication session. The control device 2 performs bandwidth control based on the default bandwidth control information (F106), and ends the bandwidth control processing. As the default bandwidth control information, for example, a method for evenly assigning bandwidth to all communication sessions for which bandwidth control information is not registered in the bandwidth control information DB 267 is registered.

On the other hand, in the process of F105, when it is determined that the initial bandwidth measured in the process of F104 is a constant value, the source address 801, the destination address 802, the source port number 804, and Since the bandwidth control information that matches the destination port number 805 is not registered in the bandwidth control information DB 267, the communication speedup device 2 relaxes the condition of whether or not the bandwidth control information corresponds to the communication session than the processing of F102. Thus, it is determined whether or not the bandwidth control information corresponding to the communication session is registered in the bandwidth control information DB 267. That is, the communication speed-up device 2 refers to the bandwidth control information DB 267, the bandwidth value of the bandwidth control information DB 267 matches the initial bandwidth value measured in the process of F104, and the address or port number has been received. It is determined whether or not bandwidth control information having the same address or port number included in the data communication start message is registered (F107). In the processing of F107, the communication speed increasing device 2 determines whether or not the bandwidth control information related to the communication session for which the initial bandwidth is measured is registered in the bandwidth control information DB 267.

Specifically, the communication speed-up device 2 matches the band value registered in the band control setting value 507 of the band control information DB 267 with the initial band value measured in the process of F104, and It is determined whether or not bandwidth control information that satisfies at least one of the first condition to the fourth condition is registered in the bandwidth control information DB 267. The first condition is a condition that the address of the computer 3 registered in the external address 502 matches the address of the computer 3 registered in the destination address 802 of the received data communication start message. The second condition is a condition that the address of the computer 3 registered in the internal address 503 matches the address of the computer 3 registered in the transmission source address 801 of the received data communication start message. The third condition is a condition that the port identification information registered in the external port number 504 matches the port identification information registered in the destination port number 805 of the received data communication start message. The fourth condition is a condition that the port identification information registered in the internal port number 505 matches the port identification information registered in the transmission source port number 804 of the received data communication start message.

In the process of F107, when it is determined that the bandwidth control information corresponding to the communication session is registered in the bandwidth control information DB 267 under conditions that are more relaxed than the process of F102, the communication speedup device 2 uses the bandwidth control information. Then, band control is performed (F108). Then, the communication speed-up device 2 determines whether or not the increase or decrease amount of the data capacity stored in the transmission buffer before and after the band control is performed in the process of F108 is greater than or equal to a predetermined value (F109).

In the process of F107, there is a case where the band control information that does not correspond to the communication session due to erroneous measurement of the initial band is erroneously determined as the band control information corresponding to the communication session. For example, the erroneous measurement of the initial band may be a case where the band used by the communication session increases or decreases after the band measurement is completed in the initial band measurement process of F104. Whether or not the bandwidth control information corresponding to the communication session is appropriate can be determined based on a change in the data capacity stored in the transmission buffer of the communication speed-up device 2. The bandwidth of the internal network is a bandwidth for the computer 3 arranged at the same base 6 as the communication speed increasing device 2 to transmit data, and the bandwidth of the external network is a bandwidth allocated to the communication session. When there is a difference between these two bands, the data capacity stored in the transmission buffer of the communication speed-up device 2 changes significantly. For example, when the bandwidth of the internal network is larger than the bandwidth of the external network, data is rapidly accumulated in the transmission buffer of the communication speed increasing device 2, and the data capacity of the transmission buffer increases. On the other hand, when the bandwidth of the internal network is smaller than the bandwidth of the external network, the data in the transmission buffer of the communication speed-up device 2 is depleted, and the data capacity of the transmission buffer decreases. For this reason, the communication speed-up device 2 determines whether or not the band control information determined to correspond to the communication session is appropriate by executing the process of F109.

In the process of F109, when it is determined that the increase or decrease of the data capacity stored in the transmission buffer before and after the band control is performed in the process of F108 is greater than or equal to a predetermined value, the communication speedup device 2 It is determined that the bandwidth control information determined to correspond to is not appropriate, the processing proceeds to F106, bandwidth control is performed based on the default bandwidth control information, and the bandwidth control processing ends.

On the other hand, in the process of F109, when it is determined that the increase or decrease of the data capacity stored in the transmission buffer before and after the band control is performed in the process of F108 is less than a predetermined value, the communication speedup device 2 The bandwidth control information determined to correspond to the session is determined to be appropriate, and the bandwidth control process is terminated in order to continue the bandwidth control based on the bandwidth control information.

When it is determined in the process of F107 that the bandwidth control information corresponding to the communication session is not registered in the bandwidth control information DB 267 under the conditions relaxed than the process of F102, the communication session is a fixed-band communication and the communication session There is no bandwidth control information corresponding to. For such a communication session, the communication speed-up device 2 executes a detailed bandwidth measurement process for measuring the bandwidth of the established communication session for a fixed bandwidth measurement time longer than the initial bandwidth measurement time (F110). Details of the detailed band measurement process will be described with reference to FIG. 10 together with details of the initial band measurement process. Even if the bandwidth used by the communication session is constant during the initial bandwidth measurement time, the bandwidth used by the communication session increases or decreases after the initial bandwidth measurement time ends, and the bandwidth is no longer constant. Therefore, the communication speed-up device 2 measures the bandwidth used by the communication session for a detailed bandwidth measurement time longer than the initial bandwidth measurement time. If the measured bandwidth is a constant value, the communication session is a fixed bandwidth. Judged as communication.

Next, the communication speed-up device 2 determines whether or not the detailed bandwidth measured in the processing of F110 is a constant value (F111). Specifically, the communication speed-up device 2 determines whether or not the change in the detailed band measured by the processing of F111 is within a predetermined range.

In the processing of F111, when it is determined that the detailed bandwidth measured in the processing of F110 is not a constant value, the communication session to be established is bulk data communication, and there is no bandwidth control information for the communication session. The information processing apparatus 2 proceeds to the processing of F106, performs bandwidth control based on the default bandwidth control information, and ends the bandwidth control processing.

On the other hand, in the processing of F111, when it is determined that the detailed bandwidth measured in the processing of F110 is a constant value, the communication speedup device 2 stores the bandwidth control history information DB 269 based on the measurement result of the detailed bandwidth measurement processing. Update the bandwidth control history information update processing for performing bandwidth control based on the optimal bandwidth control information (F112), and terminate the bandwidth control processing.

FIG. 10 is a flowchart of the initial bandwidth measurement process of the first embodiment.

First, the communication speed-up device 2 has the initial bandwidth measurement time 304 and the bandwidth measurement cycle of the record in which its own identification information is registered in the device identification information 301 of the device basic information DB 263 and its own address is registered in the device address 302. The value registered in 306 is acquired, and the processes of F202 to F204 are repeatedly executed until the acquired initial bandwidth measurement time elapses (F201).

Next, the communication speed-up device 2 measures the data capacity transmitted in the established communication session for each acquired bandwidth measurement period, and divides the measured data capacity by the bandwidth measurement period, thereby obtaining the bandwidth measurement period. The bandwidth is calculated (F202).

Next, the communication speed-up device 2 calculates the average and variance of the bands based on the bands in the band measurement period calculated in the process of F202 and the bands in other band measurement periods calculated within the same initial band measurement time. Is calculated (F203).

Next, the communication speed-up device 2 acquires the threshold value registered in the fixed bandwidth distribution threshold value 307 of the record corresponding to itself in the device basic information DB 263, and the variance calculated in the process of F203 is equal to or less than the acquired threshold value. Whether or not (F204).

On the other hand, in the process of F204, when it is determined that the variance calculated in the process of F203 is larger than the threshold, it is determined that the fluctuation of the band is not within the predetermined range and the band is not a constant value, and the initial band measurement time has elapsed. Even if not, the initial band measurement process is terminated. For this reason, when it is determined once that the bandwidth is not a constant value, the communication speed-up device 2 ends the initial bandwidth measurement process, so that the processing load for measuring the bandwidth can be reduced.

In the process of F204, when it is determined that the variance calculated in the process of F203 is equal to or less than the threshold, the communication speedup device 2 determines whether or not the initial bandwidth measurement time has elapsed. If the initial bandwidth measurement time has not elapsed, the communication speedup device 2 returns to the process of F202 and measures the bandwidth of the communication session at the bandwidth measurement cycle. When the initial band measurement time has elapsed, the communication speedup device 2 ends the initial band measurement process. In the process of F204, if the variance calculated in the process of F203 is not determined to be larger than the threshold value, and the initial band measurement time has elapsed, the communication speedup device 2 indicates that the band fluctuation is within a predetermined range. It is determined that the bandwidth is a constant value.

In the initial bandwidth measurement process, the communication speedup device 2 measures the bandwidth of the communication session for the time registered in the initial bandwidth measurement time 304 of the device basic information DB 263. The bandwidth of the communication session is measured for the time registered in the fixed bandwidth measurement time 305. Since the fixed bandwidth measurement time is set longer than the initial bandwidth measurement time, the communication speed-up device 2 can measure the bandwidth of the communication session in detail in the detailed bandwidth measurement processing. The initial bandwidth measurement time is set to a value in the range of 1 to 2 seconds, for example, while the fixed bandwidth measurement time is set to a value of about 10 seconds, for example.

In the bandwidth control processing shown in FIG. 9, it is determined in the processing of F102 that the bandwidth control information corresponding to the communication session is not registered in the bandwidth control information DB 267, and in the processing of F105, it is determined that the initial bandwidth is not a constant value. In the process of F107, when it is determined that the band control information corresponding to the communication session is not registered in the band control information DB 267 under the conditions relaxed than the process of F102, the detailed band measurement process is executed. On the other hand, conventionally, detailed bandwidth measurement processing has been executed for all communication sessions. Therefore, in this embodiment, it is possible to reduce the computer resources of the communication speed-up device 2 necessary for measuring the communication session, compared to the conventional case.

FIG. 11 is a flowchart of bandwidth control information history update processing according to the first embodiment.

First, the communication speed-up device 2 determines whether or not the bandwidth control history information corresponding to the communication session is registered in the bandwidth control history information DB 269 (F301). The communication speedup device 2 registers the address of the computer 3 registered in the destination address 802 of the received data communication start message in the external address 602 of the bandwidth control history information DB 269 and starts the received data communication in the internal address 603. The address of the computer 3 registered in the source address 801 of the message is registered, and the identification information of the port of the computer 3 registered in the destination port number 805 of the received data communication start message is registered in the external port number 604. In the internal port number 605, the identification information of the port of the computer 3 registered in the transmission source port number 804 of the received data communication start message is registered, and the value of the band registered in the use band 606 is measured by the processing of F110. A record matching the bandwidth value registered is registered in the bandwidth control history information DB 269. And determines whether or not.

Here, the determination process of whether or not the band value registered in the use band 606 matches the band value measured in the process of F110 will be described. First, the communication speed-up device 2 calculates the detailed bandwidth by dividing the data capacity measured by the processing of F110 by the fixed bandwidth measurement time. Then, the communication speed-up device 2 uses the difference between the bandwidth value registered in the used bandwidth 606 and the calculated detailed bandwidth value when it is equal to or smaller than the fixed bandwidth dispersion threshold of its own record in the device basic information DB 263. It is determined that the band value registered in the band 606 matches the value of the detailed band.

When it is determined in the processing of F301 that the bandwidth control history information corresponding to the communication session is registered in the bandwidth control history information DB 269, the communication speedup device 2 determines that the bandwidth control history information is the established communication session. The bandwidth control history information and the reproducibility are judged to be high, and the control history information is registered in the bandwidth control information DB 267 (F302).

Specifically, the communication speed increasing device 2 adds a new record to the bandwidth control information DB 267, and sets the external address 502 of the added record to the address of the computer 3 registered in the external address 602 of the bandwidth control history information. The address of the computer 3 registered in the internal address 603 of the bandwidth control information is registered in the internal address 503, and the port identification information registered in the external port number 604 of the bandwidth control history information is registered in the external port number 504. And the identification information of the port registered in the internal port number 605 of the bandwidth control history information is registered in the internal port number 505. Further, the communication speed-up device 2 registers information indicating that the fixed-band communication is performed in the bandwidth control method 506 of the added record, and the bandwidth registered in the bandwidth 606 of the bandwidth control history information in the bandwidth control setting value 507. And the identification information registered in the history information identification information 601 of the bandwidth control history information is registered in the related history information 508. Further, the communication speed-up device 2 generates unique identification information indicating the added record, and registers the generated identification information in the bandwidth control information identification information 501 of the added record.

Next, the communication speed-up device 2 performs band control based on the band control information newly registered in the band control information DB 267 in the process of F302 (F303), and ends the band control history information update process.

On the other hand, when it is determined in the process of F301 that the bandwidth control history information corresponding to the communication session is not registered in the bandwidth control history information DB 269, the communication speedup device 2 sets the used bandwidth 606 in the bandwidth control history information DB 269. The bandwidth control history information in which the registered bandwidth value matches the detailed bandwidth value and the address or port number of the communication session (established communication session) in which the detailed bandwidth is measured matches in the bandwidth control history information DB 269. It is determined whether it is registered (F304). In other words, in the process of F304, the communication speedup device 2 determines whether or not the bandwidth control history information related to the communication session for which the detailed bandwidth is measured is held. Specifically, the communication speed-up device 2 determines that the band value registered in the used band 606 of the band control history information DB 269 matches the detailed band value, and the first condition similar to the process of F107 shown in FIG. To determine whether at least one of the fourth conditions is satisfied.

In the process of F304, when it is determined that the bandwidth control history information that matches the bandwidth and the address or port number of the communication session in which the detailed bandwidth is measured is not registered in the bandwidth control history information DB 269, the communication speed is increased. The device 2 newly registers the bandwidth control history information of the established communication session in the bandwidth control history information DB 269 (F305), and proceeds to the processing of F306.

Specifically, the communication speed increasing device 2 adds a new record to the bandwidth control history information DB 269, generates unique identification information of the added record, and history information identification information of the record to which the generated identification information is added. 601 is registered. Further, the communication speed increasing device 2 registers the address of the computer 3 registered in the destination address 802 of the received data communication start message in the external address 602 of the added record, and receives it in the internal address 503 of the added record. The address of the computer 3 registered in the transmission source address 801 of the data communication start message is registered. In addition, the communication speed increasing device 2 registers the identification information of the port of the computer 3 registered in the destination port number 805 of the received data communication start message in the external port number 604 of the added record. In the port number 605, the identification information of the port of the computer 3 registered in the transmission source port number 804 of the received data communication start message is registered.

In addition, the communication speed-up device 2 registers the detailed bandwidth of the communication session established in the used bandwidth 606 of the added record. Further, since the communication speed-up device 2 is the first detection, “1” is registered in the added record detection count 607, and the date and time information of the timing of adding the record is added to the registration date and time 609 of the added record. A preset value is registered in the expiration date 610 of the added record.

Next, the communication speed-up device 2 assigns the band registered in the use band 606 of the band history information to the established communication session, performs band control (F306), and ends the band control history information update process. .

On the other hand, when it is determined in the process of F304 that the bandwidth control history information having the same bandwidth and the same address or port number of the communication session whose detailed bandwidth is measured is registered in the bandwidth control history information DB 269, the communication The speed-up device 2 associates the bandwidth control history information of the established communication session with the bandwidth control history information related to the bandwidth control history information and registers it in the bandwidth control history information DB 269 (F307).

Specifically, the communication speed-up device 2 adds a new record to the bandwidth control history information DB 269, and the bandwidth control history determined to be related to the history information identification information 601 of the added record by the process of F304. The identification information registered in the history information identification information 601 of information is registered. As a result, the communication speed-up device 2 can associate the bandwidth control history information of the established communication session and the bandwidth control history information related to the bandwidth control history information in association with each other and register them in the bandwidth control history information DB 269. Control history information can be managed as the same group. Note that the method for updating the other columns of the added record is the same as the processing in F305, and thus description thereof is omitted.

Next, the communication speed increasing device 2 registers the total number of detection times of the bandwidth control history information registered in the bandwidth control history information DB 269 as the same group as the bandwidth control history information of the established communication session in the detection frequency threshold 608. It is determined whether or not the threshold value is greater than or equal to (F308). Specifically, the communication speed-up device 2 is registered in the number of detection times 607 of all the bandwidth control history information that matches the identification information registered in the history information identification information 601 of the bandwidth control history information of the established communication session. It is determined whether or not the sum of the number of times is equal to or greater than a threshold value registered in the detection frequency threshold value 608.

In the processing of F308, the sum of the detection counts of the bandwidth control history information registered in the bandwidth control history information DB 269 as the same group as the bandwidth control history information of the established communication session is equal to or greater than the threshold registered in the detection count threshold 608. If it is determined, the communication speedup apparatus 2 proceeds to the process of F302, registers the bandwidth control history information registered in the bandwidth control history information DB 269 as the same group in the bandwidth control information DB 267, and proceeds to the process of F303. In this case, the communication speed-up device 2 may register all the bandwidth control history information registered in the bandwidth control history information DB 269 as the same group in the bandwidth control information DB 267. Further, the communication speed increasing device 2 may register only the matching columns in the bandwidth control information DB 267 among all the bandwidth control history information registered in the bandwidth control history information DB 269 as the same group.

The communication speed-up device 2 proceeds to the processing of F303 after the processing of F302 is completed, performs bandwidth control based on the bandwidth control information newly registered in the bandwidth control information DB 267, and ends the bandwidth control history information update processing. .

On the other hand, in the process of F308, the total number of detection times of the bandwidth control history information registered in the bandwidth control history information DB 269 as the same group as the bandwidth control history information of the established communication session is less than the threshold registered in the detection frequency threshold 608. If it is determined that the communication speed-up device 2 proceeds to the process of F306, the bandwidth registered in the bandwidth 606 used for the bandwidth control history information is assigned to the established communication session, and bandwidth control is performed. The bandwidth control history information update process is terminated.

Next, the bandwidth control history information update process shown in FIG. 11 will be described using the specific examples of FIGS. 12A to 12C. FIG. 12A is an explanatory diagram of an example of the bandwidth control history information DB 269 before update according to the first embodiment. FIG. 12B is an explanatory diagram of an example of the updated bandwidth control history information DB 269 according to the first embodiment. FIG. 12C is an explanatory diagram of an example of the bandwidth control history information DB 269 before being updated according to the first embodiment.

It is assumed that the following communication session is detected.
External address: 192.168.2.101
Internal address: 192.168.3.10.
External port number: 10100
Internal port number: 20100
・ Communication bandwidth: 5.0 Mbps

The records in the first and second lines of the bandwidth control history information DB 269 shown in FIG. 12A match the external session, the internal address, and the bandwidth, but the external port number and the internal port number do not match the communication session. Therefore, in the process of F301, it is determined that the band control history information corresponding to the communication session is not registered in the band control history information DB 269, and the process proceeds to F304.

In the process of F304, the records in the first and second lines of the bandwidth control history information DB 269 shown in FIG. 12A indicate that the bandwidth value registered in the used bandwidth 606 matches the bandwidth value of the communication session, Since the address registered in the internal address also matches the external address and internal address of the communication session, the process proceeds to F307.

In the process of F307, the communication speedup device 2 updates the bandwidth control history information DB 269 based on the detected bandwidth control history of the communication session. Specifically, the communication speed-up device 2 adds a record in the third row, and relates to the bandwidth control history information (the first and second rows shown in FIG. 12A) in the history information identification information 601 of the added record. 1) “history 1” registered in the history information identification information 601 is registered, “192.168.2.101” is registered in the external address 602 of the added record, and “ "192.168.3.10" is registered, "10100" is registered in the external port number 604 of the added record, "20100" is registered in the internal port number 605 of the added record, and the used bandwidth of the added record “5.0 Mbps” is registered in 606, “1” is registered in the detection count 607 of the added record, and “10” is registered in the detection count threshold 608 of the added record. And registered in the registration date and time 609 of the record added to the "11/5 9:30", to register the "one week" to the expiration date 610 of the added record.

When the bandwidth control history information DB 269 is updated in the process of F307, the process proceeds to the process of F308. In the processing of F308, the communication speedup device 2 determines whether or not the total number of detections of the band control history information of the same group as the detected communication session is equal to or greater than the detection number threshold.

In the bandwidth control history information DB 269 in FIG. 12B, the total number of detections of the bandwidth control history information of the same group as the detected communication session is “3”, which is less than the detection frequency threshold “10”. move on.

Here, a case where the detection frequency threshold is “3” and it is determined in the process of F308 that the total number of detections of the bandwidth control history information of the same group as the detected communication session is greater than or equal to the detection frequency threshold will be described. . In this case, the communication speed-up device 2 proceeds to the process of F302, and registers the three bandwidth control history information of the bandwidth control history information DB 269 illustrated in FIG. 12B in the bandwidth control information DB 267. The communication speed-up device 2 may register all three band control history information in the band control information DB 267, or may register only a common column among the three band control history information in the band control information DB 267. . For example, in the bandwidth control history information DB 269 illustrated in FIG. 12B, the external address 602 and the internal address 603 are common, so in the processing of F302, the communication speedup device 2 sets “192.168.168” in the external address 502 of the bandwidth control information DB 267. .2.101 ”,“ 192.168.3.10 ”is registered in the internal address 503,“ 5.0 Mbps ”is registered in the bandwidth control setting value 507, and“ history 1 ”is registered in the related history information 508. Register.

In FIG. 12A, the bandwidth control history information DB 269 in which the external address and the internal address match with the established communication session has been described, but in FIG. 12C, the bandwidth control in which the established communication session matches the external port number and the internal port number. The history information DB 269 is shown.

In the present embodiment, the communication speed-up device 2 measures the initial bandwidth based on the initial bandwidth when it is determined that the initial bandwidth measured in the initial bandwidth measurement processing (first bandwidth measurement processing) is a constant value. It is determined whether or not bandwidth control information related to the transmitted communication session is held. If the bandwidth control information related to the communication session in which the initial bandwidth is measured is held, the communication speedup device 2 performs bandwidth control based on the bandwidth control information, and the communication in which the initial bandwidth is measured. If the bandwidth control information related to the session is not held, the detailed bandwidth measurement process (second bandwidth measurement process) is executed. In the prior art, in order to determine whether or not the bandwidth used by the communication session is a constant value, a detailed bandwidth measurement process is executed every time the communication session is established. If there is related bandwidth control information, the detailed bandwidth measurement process is not executed, so that it is possible to reduce computer resources necessary for measuring a communication session. In addition, since the bandwidth control information related to the communication session is bandwidth control information based on the initial bandwidth, there is a high possibility that it corresponds to the bandwidth used by the communication session, and the bandwidth utilization efficiency can be improved.

In this embodiment, as a method for determining whether or not the bandwidth control information is related to the communication session for which the initial bandwidth is measured, the communication speed-up device 2 is within a predetermined range from the initial bandwidth, It is determined whether at least one of the source address, destination address, source port identification information, and destination port identification information of the communication session whose bandwidth has been measured in the bandwidth measurement processing matches. Accordingly, bandwidth control can be performed with bandwidth control information highly relevant to a communication session, and bandwidth utilization efficiency can be improved.

Also, in this embodiment, when bandwidth control is performed based on bandwidth control information related to a communication session, the communication speed-up device has the data capacity stored in the transmission buffer for a predetermined time before and after bandwidth control. If the increase amount or the decrease amount is equal to or greater than the predetermined value, the bandwidth control based on the bandwidth control information is stopped. The communication speed-up device 2 can grasp that the bandwidth control information related to the communication session does not correspond to the communication session, and can stop the bandwidth control based on the bandwidth control information.

Also, in this embodiment, when it is determined that the detailed bandwidth is a constant value, the communication speed-up device 2 is within a predetermined range from the detailed bandwidth, and the transmission source address of the communication session in which the detailed bandwidth is measured, When the bandwidth control history information in which at least one of the destination address, the source port identification information, and the destination port identification information matches is held, the bandwidth control history information of the communication session in which the bandwidth control history information and the detailed bandwidth are measured And as the same group. Then, when the total number of times that the bandwidth control history information held as the same group is detected is equal to or greater than a threshold, the communication speedup device 2 displays the bandwidth control history information held as the same group as the bandwidth control information. Hold as. As a result, the related bandwidth control history information whose number of detections is equal to or greater than the threshold value becomes the bandwidth control information, and the number of bandwidth control information increases, so that the possibility of executing the detailed bandwidth measurement process can be reduced.

In this embodiment, the communication speed-up device 2 facilitates management of the bandwidth control history information of the same group by adding the same identification information to the bandwidth control history information of the same group.

Example 2 will be described with reference to FIGS. 13 to 22C.

In Example 1, the communication speed-up device 2 measures the bandwidth of the communication session and updates the bandwidth control information based on the measured bandwidth. When the communication speed-up device 2 is placed at many locations 6, the bandwidth control server collectively manages the bandwidth control information and the bandwidth control history information of the communication speed-up devices 2 placed at many locations 6. Therefore, more appropriate band control information can be selected.

FIG. 13 is an explanatory diagram of the communication system according to the second embodiment.

The bandwidth control server 7 is connected to the network 4. The bandwidth control server 7 transmits / receives bandwidth control information and bandwidth control history information to / from the communication speed-up device 2 arranged at each site 6.

FIG. 14 is a hardware configuration diagram of the bandwidth control server 7 according to the second embodiment. The bandwidth control server 7 includes a network interface 70, a control unit (CPU) 71, an external storage device 72, and an internal storage device 76. These are connected to each other via a bus 78.

The network interface 70 is connected to the network 4. The internal storage device 76 is, for example, a memory, and the internal storage device 76 stores a device management program 761, a bandwidth control program 762, a device basic information DB 763, a bandwidth control information DB 767, and a bandwidth control history information DB 769.

The device management program 761 is a program that causes the control unit 71 to execute processing for managing the communication speed increasing device 2. The bandwidth control program 762 is a program that causes the control unit 71 to execute bandwidth control processing, similarly to the bandwidth control program 262.

In the device basic information DB 763, device basic information of the communication speed-up device 2 operating at each site 6 is registered. The configuration of the device basic information DB 763 is the same as the configuration of the device basic information DB 263 of the first embodiment, and a description thereof will be omitted. The bandwidth control information DB 767 and the bandwidth control history information DB 769 are the same as the bandwidth control information DB 267 and the bandwidth control history information DB 269 of the first embodiment except that they differ in managing the identification information of the communication speed-up device 2.

FIG. 15 is an explanatory diagram of the bandwidth control information DB 767 according to the second embodiment. Of the configuration of the bandwidth control information DB 767, the same configuration as the bandwidth control information DB 267 of the first embodiment is given the same reference numeral, and the description thereof is omitted.

The bandwidth control information DB 767 includes device identification information 1501, bandwidth control information identification information 501, external address 502, internal address 503, external port number 504, internal port number 505, bandwidth control method 506, bandwidth control setting value 507, and related history. Information 508 is included. In the device identification information 1501, identification information of the communication speed-up device 2 is registered.

FIG. 16 is an explanatory diagram of the bandwidth control history information DB 769 according to the second embodiment. Of the configuration of the bandwidth control history information DB 769, the same configuration as the bandwidth control history information DB 269 of the first embodiment is given the same reference numeral, and the description thereof is omitted.

The bandwidth control history information DB 769 includes history information identification information 601, device identification information 1601, external address 602, internal address 603, external port number 604, internal port number 605, used bandwidth 606, detection count 607, registration date and time 609, and valid Includes deadline 610. In the device identification information 1601, identification information of the communication speed-up device 2 is registered.

FIG. 17 is a sequence diagram of bandwidth control history information collection processing by the bandwidth control server 7 according to the second embodiment. The bandwidth control server 7 centrally manages the bandwidth control history information of the communication speedup device 2 at each site 6.

First, the communication speed increasing device 2A updates the bandwidth control history information DB 269 by the processing of F305 or F307 shown in FIG. 11 (S201). A bandwidth control history information message including the updated bandwidth control information is transmitted to the bandwidth control server 7 (S202). The bandwidth control history information message will be described with reference to FIG. FIG. 18 is an explanatory diagram of a bandwidth control history information message according to the second embodiment.

The bandwidth control history information message includes a transmission source address 1801, a destination address 1802, a packet type 1803, device identification information 1804, and a bandwidth control history information list 1805.

In the transmission source address 1801, the address of the communication speed-up device 2 that transmits the bandwidth control history information message is registered. In the destination address 1802, the address of the bandwidth control server 7 that is the destination of the bandwidth control history information message is registered. In the packet type 1803, information indicating that it is a bandwidth control history information message is registered. In the device identification information 1804, identification information of the communication speed-up device 2 that transmits the bandwidth control history information message is registered. Updated bandwidth control history information is registered in the bandwidth control history information list 1805. In the bandwidth control history information list 1805, not only the updated bandwidth control history information but also information registered in the updated bandwidth control history information DB 269 may be registered.

When the bandwidth control history information message is received, the bandwidth control server 7 registers the information registered in the bandwidth control history information list 1805 included in the received bandwidth control history information message in the bandwidth control history information DB 769. Specifically, the bandwidth control server 7 matches the device identification information 1804 of the received bandwidth control history information message with the device identification information 1601 of the bandwidth control history information DB 769, and the history information identification information of the bandwidth control history information DB 769. If there is a record in the bandwidth control history information DB 769 that matches the history information identification information 601 of the information registered in the bandwidth control history information list 1805 of the bandwidth control history information message received by 601, the record is included in the bandwidth control history information list. Update based on the information registered in 1805. On the other hand, if the record does not exist in the bandwidth control history information DB 769, the bandwidth control server 7 adds a new record to the bandwidth control history information DB 769 and receives the bandwidth control history information message received in the device identification information 1601 of the added record. Device identification information 1804 is registered, and the information registered in each column of the bandwidth control history information list 1805 is registered in the other columns.

Also, when the bandwidth control history information DB 269 is updated by the processing of F305 or F307 (S203), the other communication speedup device 2B also transmits a bandwidth history information message to the bandwidth control server 7 (S204).

When the bandwidth control history information DB 769 is updated, the bandwidth control server 7 executes relevance determination processing for determining relevance of the bandwidth control history information (S205). In the relevance determination process, the bandwidth control server 7 calculates the sum of the detection counts of the relevant bandwidth control history information. If the calculated sum is equal to or greater than the threshold, the bandwidth control server 7 uses the bandwidth control history information as bandwidth control information to perform bandwidth control. Register in the information DB 767. The relevance determination process will be described in detail with reference to FIG.

When the bandwidth control server 7 updates the bandwidth control information DB 767 in the relevance determination process, the bandwidth control server 7 transmits a bandwidth control information message including the updated bandwidth control information DB 767 to the communication speed-up

devices

2A and 2B (S206, S207).

The bandwidth control information message will be described with reference to FIG. FIG. 19 is an explanatory diagram of a bandwidth control information message according to the second embodiment.

The bandwidth control information message includes a transmission source address 1901, a destination address 1902, a packet type 1903, device identification information 1904, and a bandwidth control information list 1905. In the transmission source address 1901, the address of the bandwidth control server 7 that is the transmission source of the bandwidth control information message is registered. Registered in the destination address 1902 is the address of the communication speed-up device 2 that is the destination of the bandwidth control information message. In the packet type 1903, information indicating that it is a bandwidth control information message is registered. In the device identification information 1904, the identification information of the communication speed-up device 2 that is the destination of the bandwidth control information message is registered. Also, updated bandwidth control information is registered in the bandwidth control information list 1905. In the band control information list 1905, not only the updated band control information but also information registered in the updated band control information DB 767 may be registered.

When the communication speed-up device 2 receives the bandwidth control information message, the communication speedup device 2 updates the bandwidth control information DB 267 based on the bandwidth control information list 1905 of the received bandwidth control information message.

Further, for example, when the new communication speed increasing device 2C registers new bandwidth control information in the bandwidth control information DB 267 in the process of F302 shown in FIG. 11 (S208), a new bandwidth control information message including the new bandwidth control information is sent. It transmits to the bandwidth control server 7 (S209). When the bandwidth control server 7 receives the new bandwidth control information message, the bandwidth control server 7 registers it in the received bandwidth control information DB 767.

FIG. 20 is a flowchart of relevance determination processing according to the second embodiment. The relevance determination process is executed when the bandwidth control server 7 receives the bandwidth control history information message and updates the bandwidth control history information DB 769 based on the received bandwidth control history information message.

First, the bandwidth control server 7 determines that the used bandwidth included in the received bandwidth control history information message matches the used bandwidth 606 of the bandwidth control history information DB 769 and the external port number included in the received bandwidth control history information message is It is determined whether or not the bandwidth control history information that matches the external port number 604 is registered in the bandwidth control history information DB 769 (F401).

In the processing of F401, the used bandwidth included in the received bandwidth control history information message matches the used bandwidth 606 of the bandwidth control history information DB 769, and the external port number included in the received bandwidth control history information message is the external port number. If it is determined that the bandwidth control history information that matches 604 is not registered in the bandwidth control history information DB 769, the processing proceeds to F402. In the process of F402, the communication speedup device 2 uses the bandwidth control history information in which the used bandwidth included in the received bandwidth control history information message matches the used bandwidth 606 of the bandwidth control history information DB 769 and the address is common. It is determined whether it is registered in the information DB 769 (F402). Here, the bandwidth control history information having a common address is a path from the computer 3 identified by the internal address of the bandwidth control history information included in the received bandwidth control history information message to the computer 3 identified by the external address. This is band control history information of a communication session connecting these computers 3 through different paths. Details of the processing of F402 (address common determination processing) will be described in detail with reference to FIG.

In the processing of F402, the used bandwidth included in the received bandwidth control history information message matches the used bandwidth 606 of the bandwidth control history information DB 769, and the bandwidth control history information having the same address is not registered in the bandwidth control history information DB 769. If it is determined, the bandwidth control server 7 determines that there is no related bandwidth control history information, and ends the process.

On the other hand, in the process of F401, the bandwidth control history information in which the values registered in the used bandwidth 606 match and the port identification information registered in the external port number 604 matches is registered in the bandwidth control history information DB 769. Or the processing registered in the bandwidth control history information DB 769 that matches the values registered in the used bandwidth 606 and has the same address. In this case, the bandwidth control server 7 determines that there is related bandwidth control history information, and proceeds to the processing of F403.

In the processing of F403, the bandwidth control server 7 updates a record of related bandwidth control history information (F403). Specifically, the bandwidth control server 7 registers the identification information of the same bandwidth control history information in the history information identification information 601 of the related bandwidth control history information record. As the identification information of the same band control history information, unique identification information may be newly generated, or the identification information of one band control history information among related band control history information may be used.

Next, the bandwidth control server 7 calculates the sum of the times registered in the number of detection times 607 of the record of the related bandwidth control history information updated in the process of F403, and the calculated sum is registered in the detection frequency threshold 608. It is determined whether or not it is equal to or greater than the threshold value (F404).

If it is determined in the process of F404 that the total number of times registered in the detection count 607 of the related band control history information record is greater than or equal to the threshold registered in the detection count threshold 608, the related bandwidth control history Band control information is generated based on the information, and the generated band control information is registered in the band control information DB 767 (F405). Details of the processing of F405 are the same as the processing of F302 shown in FIG.

Next, the bandwidth control server 7 transmits a bandwidth control information message including the updated bandwidth control information DB 767 to the communication speed-up device 2 (F406), and ends the relevance determination processing.

FIG. 21 is a flowchart of address common determination processing according to the second embodiment.

First, the bandwidth control server 7 selects, from the bandwidth control history information DB 769, bandwidth control history information that matches the used bandwidth of the bandwidth control history information included in the received bandwidth control history information message (F501).

Next, the bandwidth control server 7 has the bandwidth control history information of the external address that matches the internal address of the bandwidth control history information included in the received bandwidth control history information message in the bandwidth control history information selected in the process of F501. Whether or not (F502).

When it is determined in the processing of F502 that the bandwidth control history information does not exist, the bandwidth control server 7 determines that there is no bandwidth control history information with a common address, and ends the processing.

On the other hand, when it is determined in the process of F502 that the bandwidth control history information of the external address that matches the internal address of the bandwidth control history information included in the received bandwidth control history information message exists, the bandwidth control history information is received. It is determined whether or not the bandwidth control history information is included in the bandwidth control history information message (F503).

In the processing of F503, it is determined that the bandwidth control history information included in the received bandwidth control history information message is not the bandwidth control history information included in the bandwidth control history information message. In this case, the bandwidth control server 7 selects the bandwidth control history information as an address common candidate (F504), and returns to the processing of F502. In the processing of F502, the bandwidth control server 7 has other bandwidth control history information in which the internal address of the address common candidate selected in the processing of F504 matches the external address in the bandwidth control history information selected in the processing of F501. It is determined whether or not.

On the other hand, in the processing of F503, the bandwidth control in which the bandwidth control history information included in the bandwidth control history information message received by the bandwidth control history information of the external address that matches the internal address in the processing of F503 is included in the bandwidth control history information message. If it is determined that the history information is the history information, the bandwidth control server 7 relates the bandwidth control history information selected as the address common candidate in the process of F504 to the bandwidth control history information included in the received bandwidth control history information message. It is determined that there is, and the process ends.

In FIG. 21, it is determined in the process of F502 whether there is other bandwidth control history information in which the internal address of the bandwidth control information matches the external address. However, the external address and internal address of the bandwidth control information are It may be determined whether there is other matching band control history information.

Thereby, communication for connecting these computers 3 through a route different from the route from the computer 3 identified by the internal address of the bandwidth control history information included in the received bandwidth control history information message to the computer 3 identified by the external address. Session bandwidth control history information is selected.

Next, the relevance determination processing shown in FIG. 20 will be described using the specific examples of FIGS. 22A and 22B. FIG. 22A is an explanatory diagram of an example of the bandwidth control history information DB 769 according to the second embodiment. FIG. 22B is an explanatory diagram of an example of the bandwidth control history information DB 769 according to the second embodiment.

Assume that the bandwidth control server 7 receives a bandwidth control history information message including the bandwidth control history information indicated by the record in the third row of the bandwidth control history information DB 769 shown in FIG. 22A. In this case, the bandwidth control history information included in the received bandwidth control history message and the records of the first and second rows of the bandwidth control history information DB 769 shown in FIG. Match at about 5 Mbps. Therefore, the bandwidth control server 7 uses the bandwidth control history information included in the received bandwidth control history information message and the bandwidth because the used bandwidth and the external port number match in the process of F401 shown in FIG. The control history information DB 769 is determined to be related to the records on the first line and the second line, and the process proceeds to F403. In the process of F403, the bandwidth control server 7 adds the record in the third row shown in FIG. 22A, and registers the bandwidth control history information included in the received bandwidth control history information message. In this case, the identification information registered in the history information identification information 601 of the records in the first and second rows is registered in the history information identification information 601 of the added record. Thereby, the three bandwidth control history information is managed as the same group.

When using a specific service with a plurality of communication acceleration devices, the internal port number is selected randomly in the established communication session, but the external port number may be a certain port number. Since such communication sessions are related in that the same service is used, the bandwidth control server 7 uses the bandwidth control history information in which the used bandwidth and the external port number match in the processing of F401. Considered as history information.

Further, it is assumed that the bandwidth control server 7 has received a bandwidth control history information message including the bandwidth control history information indicated by the record in the third row of the bandwidth control history information DB 769 shown in FIG. 22B. In this case, the bandwidth control server 7 determines that the internal address of the bandwidth control history information included in the received bandwidth control history message shown in FIG. 21 and the external address of the record in the first row of the bandwidth control history information DB 769 shown in FIG. In the processing of F503, it is determined that the record in the first row is not the bandwidth control history information of the received bandwidth control history information message. In the processing of F504, the bandwidth control server 7 uses the record in the first row as the common address. It selects as a candidate and returns to the process of F502.

In the process of F502, the bandwidth control server 7 matches the internal address of the record in the first row of the bandwidth control history information DB 769 shown in FIG. 22B with the external address of the record in the second row. It is determined that the record in the second row is not the bandwidth control history information of the received bandwidth control history information message, and in the process of F504, the bandwidth control server 7 selects the record in the second line as an address common candidate, and the process of F502 Return to.

In the process of F502, the bandwidth control server 7 matches the internal address of the record in the second row of the bandwidth control history information DB 769 shown in FIG. 22B with the external address of the bandwidth control history information of the received bandwidth control history message. In the process of F503, it is determined that the record in the second row is the bandwidth control history information of the received bandwidth control history information message. In the process of F505, the bandwidth control server 7 is included in the received bandwidth control history information message. It is determined that there is a relationship between the bandwidth control history information to be recorded and the records in the first and second rows of the bandwidth control history information DB 769.

Next, in the process of F403, the bandwidth control server 7 adds the record in the third row shown in FIG. 22B, and registers the bandwidth control history information included in the received bandwidth control history information message. In this case, the identification information registered in the history information identification information 601 of the records in the first and second rows is registered in the history information identification information 601 of the added record. Thereby, the three bandwidth control history information is managed as the same group.

In the example shown in FIG. 22B, the internal address “192.168.2.101” of the communication session of the bandwidth control history information of the record in the third row is the external address “192.168.4.50” from the computer 3. The route to the computer 3 includes two communication session routes of the bandwidth control history information of the first row record and the second row record in addition to the communication session route of the bandwidth control history information of the third row record. is there. These two paths are routed from the computer 3 being “192.168.2.101” to the computer 3 being “192.168.4.50” via the computer 3 being “192.168.3.10”. It is a route to reach.

When there is related bandwidth control history information as described above, the bandwidth control server 7 assigns the same identification information to the related bandwidth control history information, and collectively manages the related bandwidth control history information. Further, the bandwidth control server 7 calculates the sum of the number of times registered in the number of detections 607 of the related bandwidth control history information, and determines whether the calculated sum is equal to or greater than the threshold registered in the detection number threshold 608. judge. In FIGS. 22A and 22B, the total number of detections is “4”, which is less than “10” registered in the detection number threshold 608. Therefore, the bandwidth control server 7 does not proceed to the process of F405 shown in FIG. The sex determination process ends. If the total number of detections is equal to or greater than the detection frequency threshold, the bandwidth control server 7 proceeds to the process of F405 and updates the bandwidth control information DB 767 based on the related bandwidth control history information.

As described above, in this embodiment, the bandwidth control server (bandwidth control management device) 7 holds the bandwidth control history information of the plurality of communication speedup devices 2 and is related to the bandwidth control history information received from the communication speedup devices. A certain bandwidth control history information is managed as the same group. If the total number of detections of the bandwidth control history information of the same group is equal to or greater than the detection frequency threshold, the bandwidth control server 7 retains the bandwidth control history information as bandwidth control information, and transmits the bandwidth control information to the communication high speed. Is transmitted to the conversion apparatus 2.

Thereby, even if the number of detection times of the bandwidth control history information of each communication speed-up device 2 is less than the detection frequency threshold, the bandwidth control server 7 is related from the bandwidth control history information of the plurality of communication speed-up devices 2. By detecting the bandwidth control history information, the bandwidth control information can be set early in the plurality of communication speed-up devices 2.

Further, when determining whether or not the bandwidth control history information related to the bandwidth control history information received from the communication speed-up device 2 is retained, the bandwidth control server 7 uses the received bandwidth control history information from the used bandwidth. It is determined that the bandwidth control history information that is within a predetermined range and matches the external port number (destination port identification information) included in the received bandwidth control history information is related to the received bandwidth control history information.

As a result, the internal port number of the communication session to be established is selected at random, and the bandwidth control history information of the communication session that uses the service in which the port number having a constant external port number is selected is related to the related bandwidth control history information. It can be.

Further, when determining whether or not the bandwidth control history information related to the bandwidth control history information received from the communication speed-up device 2 is retained, the bandwidth control server 7 uses the received bandwidth control history information from the used bandwidth. Based on the bandwidth control history information within a predetermined range, based on the internal address and the external address, the bandwidth control history information of the communication session that constitutes a route different from the route from the internal address to the external address of the received bandwidth control history information. It is determined that the received bandwidth control history information is related.

As a result, the bandwidth of the communication session connecting these computers via a route different from the route from the computer identified by the internal address of the bandwidth control history information included in the received bandwidth control history information message to the computer identified by the external address. The control history information can be related bandwidth control history information.

Next, Example 3 will be described with reference to FIG. In the third embodiment, the communication speedup device 2 displays the bandwidth control information display screen 2300 on a display device (not shown) so that the administrator can confirm the bandwidth control information.

FIG. 23 is an explanatory diagram of the bandwidth control information display screen 2300 according to the third embodiment.

If the bandwidth control information is automatically set by the communication speed-up device 2 or the bandwidth control server 7, bandwidth control information not intended by the administrator may be set in the communication speed-up device 2, and the communication session There is a possibility that inappropriate bandwidth control information is set in the communication speed-up device 2 due to erroneous measurement of the used bandwidth. For this reason, the communication speed-up device 2 displays the bandwidth control information display screen 2300 to clearly show the bandwidth control information automatically set and the bandwidth control information manually set by the administrator to the administrator. Make it distinguishable.

The bandwidth control information display screen 2300 includes an external address 2301, an internal address 2302, an external port number 2303, an internal port number 2304, a communication type 2305, a bandwidth control parameter 2306, and a setting method 2307.

In the external address 2301, the address of the computer 3 registered in the external address 502 of the bandwidth control information DB 267 is displayed. In the internal address 2302, the address of the computer 3 registered in the internal address 503 of the bandwidth control information DB 267 is displayed. In the external port number 2303, port identification information registered in the external port number 504 of the bandwidth control information DB 267 is displayed. In the internal port number 2304, port identification information registered in the internal port number 505 of the bandwidth control information DB 267 is displayed. In the communication type 2305, information registered in the bandwidth control method 506 of the bandwidth control information DB 267 is displayed.

In the bandwidth control parameter 2306, information registered in the bandwidth control setting value 507 of the bandwidth control information DB 267 is displayed. In the setting method 2307, information indicating whether the bandwidth control information is set automatically or manually is displayed. Specifically, when the identification information of the bandwidth control history information is registered in the related history information 508 of the bandwidth control information DB 267, the communication speed-up device 2 indicates that the bandwidth control information is automatically set. In the setting method 2307, a bandwidth control information link that can display the bandwidth control history information registered in the related history information 508 is displayed. When the bandwidth control information link displayed in the setting method 2307 is operated, the communication speedup device 2 displays details of the bandwidth control history information registered in the related history information 508.

As described above, the administrator can check whether the bandwidth control information is automatically set or manually set. Therefore, the administrator can check whether the automatically set bandwidth control information is appropriate, and can set unnecessary bandwidth control information. Can be deleted.

In addition, this invention is not limited to the above-mentioned Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Also, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

In addition, each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.

Also, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

Claims

A bandwidth control device for controlling a bandwidth used by a communication session,
The communication session is used for data communication from a source computer of an internal network where the bandwidth control device is arranged to a destination computer of another internal network connected to the internal network via an external network,
A storage unit that holds bandwidth control information including a source address, a destination address, source port identification information, destination port identification information, and a bandwidth value assigned to the communication session of the communication session;
When the communication session is established, a first bandwidth measurement process is performed for measuring a bandwidth used by the established communication session for a first time;
When it is determined that the fluctuation of the band measured in the first band measurement process is within a predetermined range, based on the band value of the band control information and the band measured in the first band measurement process, Performing related bandwidth control information determination processing for determining whether or not bandwidth control information related to the established communication session is held in the storage unit;
When it is determined that the bandwidth control information related to the established communication session is not held in the storage unit, the bandwidth used by the established communication session is set for a second time longer than the first time. Execute the second band measurement process to measure,
When it is determined that the fluctuation of the band measured in the first band measurement process or the second band measurement process is not within a predetermined range, the band used by the established communication session is controlled by a predetermined method. When it is determined that the fluctuation of the band measured in the second band measurement process is within a predetermined range, the established communication session is used based on the band measured in the second band measurement process. And a control unit that controls a band to be transmitted.
The bandwidth control device according to claim 1,
The controller is
In the related band control information determination process, a communication session in which the band value of the band control information is within a predetermined range from the band measured in the first band measurement process, and the band is measured in the first band measurement process If the bandwidth control information in which at least one of the transmission source address, destination address, transmission source port identification information, and destination port identification information matches is stored in the storage unit, the stored bandwidth control information is established. Bandwidth control information related to the communication session
When it is determined that the bandwidth control information related to the established communication session is held in the storage unit, the established communication session is based on the bandwidth value included in the held bandwidth control information. A bandwidth control device that controls a bandwidth used by the device.
The bandwidth control device according to claim 2,
A transmission buffer for temporarily storing information to be transmitted to the external network;
The controller is
When the band used by the established communication session is controlled based on the band value included in the band control information related to the established communication session, the transmission during a predetermined time before and after the control of the band Determine whether the amount of change in the capacity of the information stored in the buffer is greater than or equal to a predetermined value,
When it is determined that the amount of change in the capacity of the information stored in the transmission buffer is greater than or equal to a predetermined value, control of the band based on the band value included in the band control information related to the established communication session is stopped. A bandwidth control apparatus characterized by that.
The bandwidth control device according to claim 1,
The storage unit includes a bandwidth value measured in the second bandwidth measurement process, a transmission source address, a destination address, a transmission source port identification information, and a destination port of a communication session whose bandwidth is measured in the second bandwidth measurement process. Band control history information including identification information is retained,
The controller is
When it is determined that the fluctuation of the band measured in the second band measurement process is within a predetermined range, the band value of the band control history information is a predetermined range from the band measured in the second band measurement process. The bandwidth control history information in which at least one of the source address, destination address, source port identification information, and destination port identification information of the communication session whose bandwidth has been measured in the second bandwidth measurement process matches is stored in the storage Determine whether it is held in the
If it is determined that the bandwidth control history information is retained in the storage unit, the retained bandwidth control history information and the bandwidth control history information of the communication session whose bandwidth is measured in the second bandwidth measurement process; Are stored in the storage unit as the same group,
When the total number of times that the bandwidth control history information held in the storage unit as the same group is detected is equal to or greater than a threshold, the bandwidth control history information held as the same group is used as the bandwidth control information as the storage unit. The bandwidth control device is characterized in that:
The bandwidth control apparatus according to claim 4, wherein
The bandwidth control history information further includes identification information that uniquely identifies the bandwidth control history information,
The control unit is a transmission source of a communication session in which a band value of the band control history information is within a predetermined range from a band measured by the second band measurement process, and a band is measured by the second band measurement process When it is determined that the bandwidth control history information in which at least one of the address, the destination address, the source port identification information, and the destination port identification information matches is held in the storage unit, the held bandwidth control history information The same identification information is added to the bandwidth control history information including the bandwidth value measured in the second bandwidth measurement process, and the bandwidth control history information is held in the storage unit as the same group. A band control device characterized by the above.
The bandwidth control device according to claim 5,
When the control unit holds the bandwidth control history information held as the same group in the storage unit as the bandwidth control information, the held bandwidth control information is added to the bandwidth control history information held as the same group. A band control device characterized by including identification information.
The bandwidth control apparatus according to claim 6, wherein
The control unit manually generates band control information that does not include the identification information of the band control history information, and that the band control information including the identification information of the band control history information is automatically generated band control information. A bandwidth control apparatus that displays a bandwidth control information display screen including the fact that the bandwidth control information has been set.
A plurality of bandwidth control devices for controlling the bandwidth used by the communication session;
A network system comprising: a bandwidth control management device connected to the plurality of bandwidth control devices;
The communication session is used for data communication from a source computer of an internal network where the bandwidth control device is arranged to a destination computer of another internal network connected to the internal network via an external network,
The bandwidth control device includes:
Band control information including a source address, a destination address, source port identification information, destination port identification information, and a band value assigned to the communication session of the communication session;
Bandwidth control history including the bandwidth value measured in the second bandwidth measurement process, the transmission source address, the destination address, the transmission source port identification information, and the destination port identification information of the communication session whose bandwidth is measured in the second bandwidth measurement processing A first storage unit for storing information;
When the communication session is established, a first bandwidth measurement process is performed for measuring a bandwidth used by the established communication session for a first time;
When it is determined that the fluctuation of the band measured in the first band measurement process is within a predetermined range, based on the band value of the band control information and the band measured in the first band measurement process, Performing related bandwidth control information determination processing for determining whether or not bandwidth control information related to the established communication session is held in the first storage unit;
If it is determined that the bandwidth control information related to the established communication session is not held in the first storage unit, the bandwidth used by the established communication session is set to a second time longer than the first time. Performing the second band measurement process for measuring during
When it is determined that the fluctuation of the band measured in the first band measurement process or the second band measurement process is not within a predetermined range, the band used by the established communication session is controlled by a predetermined method. ,
When it is determined that the fluctuation of the band measured in the second band measurement process is within a predetermined range, the band value of the band control history information is a predetermined range from the band measured in the second band measurement process. The bandwidth control history information in which at least one of the source address, destination address, source port identification information, and destination port identification information of the communication session whose bandwidth has been measured in the second bandwidth measurement processing is identical is 1 Determine whether it is held in the storage unit,
When it is determined that the bandwidth control history information is retained in the first storage unit, the retained bandwidth control history information and the bandwidth control history of the communication session in which the bandwidth is measured in the second bandwidth measurement process Holding the information as the same group in the first storage unit,
When the total number of times that the bandwidth control history information held in the first storage unit as the same group is detected is equal to or greater than a threshold, the bandwidth control history information held as the same group is used as the bandwidth control information. 1 in the storage unit,
Based on the bandwidth value of the bandwidth control history information held in the first storage unit as the bandwidth control information, the bandwidth used by the established communication session is controlled,
When the bandwidth control history information is newly stored in the first storage unit, the newly stored bandwidth control history information is transmitted to the bandwidth control management device,
A first control unit that transmits the newly stored bandwidth control information to the bandwidth control management device when the bandwidth control information is newly stored in the first storage unit;
The bandwidth control management device includes:
A second storage unit for storing the received bandwidth control history information and the received bandwidth control information;
When the bandwidth control history information is received, the bandwidth control history information related to the received bandwidth control history information is based on the bandwidth value of the bandwidth control history information and the bandwidth included in the received bandwidth control history information. It is determined whether or not it is held in the second storage unit,
When it is determined that the bandwidth control history information related to the received bandwidth control history information is held in the second storage unit, the received bandwidth control history information and the related bandwidth history information are grouped together. Held in the second storage unit,
When the total number of times that the bandwidth control history information held as the same group is detected is equal to or greater than a threshold value, the bandwidth control history information held as the same group is held in the second storage unit as the bandwidth control information And
A second control unit that transmits the newly held bandwidth control information to the bandwidth control device,
The network system according to claim 1, wherein the first control unit of the bandwidth control device holds the received bandwidth control information in the first storage unit when the bandwidth control information is received.
The network system according to claim 8, wherein
The second control unit of the bandwidth control management device includes a bandwidth value of the bandwidth control history information within a predetermined range from a bandwidth included in the received bandwidth control history information, and is included in the received bandwidth control history information. When the bandwidth control information that matches the destination port identification information is stored in the second storage unit, the stored bandwidth control history information is used as the bandwidth control history information related to the received bandwidth control history information. A network system characterized by
The network system according to claim 9, wherein
The second control unit of the bandwidth control management device includes the bandwidth control history information in which the bandwidth value is within a predetermined range from the bandwidth included in the received bandwidth control history information, and the bandwidth control history information included in the received bandwidth control history information. Based on the source address and the destination address, select the bandwidth control history information of the communication session that forms a route different from the route from the source address to the destination address of the received bandwidth control history information, and the selected bandwidth control history A network system characterized in that information is bandwidth control history information related to the received bandwidth control history information.
A bandwidth control method for controlling a bandwidth used by the communication session in a bandwidth control device that controls a bandwidth used by the communication session,
The communication session is used for data communication from a source computer of an internal network where the bandwidth control device is arranged to a destination computer of another internal network connected to the internal network via an external network,
The bandwidth control device retains bandwidth control information including a source address, a destination address, source port identification information, destination port identification information, and a bandwidth value assigned to the communication session of the communication session,
The method
When the communication session is established, the bandwidth control device executes a first bandwidth measurement process for measuring a bandwidth used by the established communication session for a first time,
When it is determined that the band variation measured in the first band measurement process is within a predetermined range, the band control device measures the band value of the band control information and the first band measurement process. Based on the bandwidth, the related bandwidth control information determination process for determining whether or not the bandwidth control information related to the established communication session is held,
If the bandwidth control device determines that the bandwidth control information related to the established communication session is not retained, the bandwidth used by the established communication session is set to a second time longer than the first time. Execute the second band measurement process to measure during
If the bandwidth control device determines that the fluctuation of the bandwidth measured in the first bandwidth measurement processing or the second bandwidth measurement processing is not within a predetermined range, the established communication session is determined in a predetermined manner. Control the bandwidth used,
When it is determined that the fluctuation of the band measured in the second band measurement process is within a predetermined range, the band control device is established based on the band measured in the second band measurement process. A bandwidth control method for controlling a bandwidth used by a communication session.
A computer-readable non-transitory storage medium for storing a program for causing a processor included in a bandwidth control device to execute processing for controlling a bandwidth used by a communication session,
The communication session is used for data communication from a source computer of an internal network where the bandwidth control device is arranged to a destination computer of another internal network connected to the internal network via an external network,
The bandwidth control device retains bandwidth control information including a source address, a destination address, source port identification information, destination port identification information, and a bandwidth value assigned to the communication session of the communication session,
In the process,
When the communication session is established, the bandwidth control device executes a first bandwidth measurement process for measuring a bandwidth used by the established communication session for a first time,
When it is determined that the band variation measured in the first band measurement process is within a predetermined range, the band control device measures the band value of the band control information and the first band measurement process. Based on the bandwidth, the related bandwidth control information determination process for determining whether or not the bandwidth control information related to the established communication session is held,
If the bandwidth control device determines that the bandwidth control information related to the established communication session is not retained, the bandwidth used by the established communication session is set to a second time longer than the first time. Execute the second band measurement process to measure during
If the bandwidth control device determines that the fluctuation of the bandwidth measured in the first bandwidth measurement processing or the second bandwidth measurement processing is not within a predetermined range, the established communication session is determined in a predetermined manner. Control the bandwidth used,
When it is determined that the fluctuation of the band measured in the second band measurement process is within a predetermined range, the band control device is established based on the band measured in the second band measurement process. A computer-readable non-transitory storage medium characterized by controlling a bandwidth used by a communication session.