JP2014112779A - Data transmission controller, data transmission control method, and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique which allows for transmission of more data with no delay, without increasing the network load, by the control on the side of a device for collecting the data to be transmitted and transmitting the data to the outside.SOLUTION: A data transmission controller includes a data collection unit 11 for collecting the data to be transmitted, a buffer 12 for storing the data thus collected, a data transmission unit 13 for transmitting the data stored in the buffer 12 to the outside over a network, a buffer storage information generation unit 14 for generating the buffer storage information about the amount of data stored in the buffer 12, a network load information generation unit 15 for generating the network load information about the load of the network, and a transmission control unit 16 for controlling the bandwidth and the transmission amount of data used by the data transmission unit 13, based on the buffer storage information and network load information.

Description

  The present invention relates to a technique for controlling data transmission to the outside.

  A technique for adjusting the influence on the network load due to data transmission to the outside is known. For example, in general information processing systems, in order to monitor threats such as information leaks, system malfunctions, or unauthorized use, log data (hereinafter simply referred to as logs) in which information processing system operations and status histories are recorded Collected) and sent to an external monitoring server or the like. Such a log is generated by a component of the information processing system. One of the purposes of collecting logs is to investigate the causal relationship between threats after they are discovered. However, the log generated by the components of the information processing system generally has a huge amount. For this reason, when the information processing system transmits all the collected logs to a monitoring server or the like, there is a problem that the bandwidth of the network is used up only by transmitting the logs and the original business is affected.

  In order to cope with the above problems, a technique called traffic shaping is known. Traffic shaping is a technique for adjusting the data transmission interval and controlling the router to smooth the transfer rate so as not to exceed the limited bandwidth.

  An example of a technique using such traffic shaping is described in Patent Document 1. In the related technique described in Patent Document 1, the first transmission device that performs traffic shaping has a buffer that stores data to be transmitted, reads data from the buffer at a predetermined rate, performs traffic shaping, and performs external shaping. Send to. When the buffer resource is depleted, the first transmission device transmits data to the second transmission device that performs traffic shaping and requests traffic shaping. The second transmission device stores the data received from the first transmission device in a buffer, reads the data to be shaped from the buffer, performs traffic shaping, and transmits the data to the outside.

  An example of a technique for performing transmission control of event data generated by a terminal is described in Patent Document 2. The related technique described in Patent Document 2 assigns importance to event data, and transmits all event data to the outside when the network load is low. In addition, this related technique transmits only highly important event data to the outside when the network load is high. As a result, this related technique suppresses the influence on the network load due to event data transmission.

JP 2012-175481 A Japanese Patent Laid-Open No. 10-028151

  However, the related techniques described in Patent Document 1 and Patent Document 2 have the following problems.

  When the related technology described in Patent Document 1 is applied to an apparatus that collects and transmits data such as logs, another transmission apparatus that performs traffic shaping is required. Therefore, in this related technique, the network load accompanying data transmission cannot be adjusted only by the apparatus that collects and transmits data such as logs.

  Further, in the related technology described in Patent Document 2, when the network is congested, a log with low importance is accumulated on the terminal side. Here, consider a case where the related technology described in Patent Document 2 is applied to an apparatus that transmits a log to a server that investigates the causal relationship of a threat. In this case, on the server side, a log that seems to have little direct relationship with the detected threat or a log that is considered to be less important is often required. In such a case, it is desirable for the terminal to send as many logs as possible to the server without significant delay. However, in the related technique described in Patent Document 2, in an environment where the network load is high, a log with low importance is not easily transmitted. As a result, the threat causal investigation may be delayed.

  The present invention has been made in order to solve the above-described problems, and the control on the device side that collects data to be transmitted and transmits the data to the outside does not increase the network load and increases more without a large delay. An object of the present invention is to provide a technology capable of transmitting the data.

  A data transmission control device of the present invention includes a data collection unit that collects data to be transmitted, a buffer unit that accumulates data collected by the data collection unit, and data that is accumulated in the buffer unit via a network. A data transmission unit to be transmitted to the outside, a buffer accumulation information generation unit for generating buffer accumulation information regarding the accumulation amount of data accumulated in the buffer unit, and network load information for generating network load information regarding the load of the network A generation unit; and a transmission control unit that controls a bandwidth used by the data transmission unit and a transmission amount of data based on the buffer accumulation information and the network load information.

  Further, the data transmission control method of the present invention collects data to be transmitted and accumulates it in the buffer unit, generates buffer accumulation information relating to the accumulation amount of the data accumulated in the buffer unit, and generates a network relating to the network load. Bandwidth and data used for transmission processing based on the buffer storage information and the network load information when generating load information and transmitting the data stored in the buffer unit to the outside via the network Control the amount of transmission.

  Further, the computer program of the present invention includes a data collection step for collecting data to be transmitted and storing it in a buffer unit, and data storage information for generating buffer storage information relating to the amount of data stored in the buffer unit Generating step, network load information generating step for generating network load information relating to network load, and when transmitting the data stored in the buffer unit to the outside via the network, the buffer storage information and the network load Based on the information, the computer apparatus is caused to execute a transmission control step for controlling a bandwidth used for transmission processing and a transmission amount of data.

  INDUSTRIAL APPLICABILITY The present invention can provide a technique capable of transmitting a large amount of data without increasing a network load by controlling on the side of a device that collects data to be transmitted and transmits the data to the outside. .

It is a functional block diagram of a data transmission control device as a 1st embodiment of the present invention. It is a flowchart explaining the data collection operation | movement of the data transmission control apparatus as the 1st Embodiment of this invention. It is a flowchart explaining the data transmission control operation | movement of the data transmission control apparatus as the 1st Embodiment of this invention. It is a functional block diagram of the data transmission control apparatus as the 2nd Embodiment of this invention. It is a flowchart explaining the data transmission control operation | movement of the data transmission control apparatus as the 2nd Embodiment of this invention. It is a flowchart explaining the detail of the data transmission control operation | movement of the data transmission control apparatus as the 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 shows a functional block configuration of a data transmission control device 1 as a first embodiment of the present invention. In FIG. 1, the data transmission control device 1 includes a data collection unit 11, a buffer unit 12, a data transmission unit 13, a buffer accumulation information generation unit 14, a network load information generation unit 15, and a transmission control unit 16. Prepare. Here, the data transmission control device 1 is a computer device having a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a storage device such as a hard disk, and a network interface. It is configurable. In this case, the data collection unit 11, the buffer accumulation information generation unit 14, the network load information generation unit 15 and the transmission control unit 16 are CPUs that read and execute computer programs and various data stored in the ROM and the storage device into the RAM. Consists of. The buffer unit 12 is configured by a RAM or a storage device. The data transmission unit 13 includes a network interface and a CPU that reads a computer program and various data stored in the ROM and the storage device into the RAM and executes them. Note that the hardware configuration of the data transmission control device 1 and each functional block thereof is not limited to the above-described configuration.

  The data transmission control device 1 is connected to the external device 90 via a network constituted by the Internet, a LAN (Local Area Network), a public line network, a wireless communication network, or a combination thereof. The external device 90 is configured by, for example, a computer device that includes a CPU, a RAM, a ROM, a storage device such as a hard disk, and a network interface. FIG. 1 shows one data transmission control device 1 and one external device 90, but the data transmission control device and the external device connected to a network to which the data transmission control device of the present invention sends data are shown. The number is not limited.

  Next, details of each functional block of the data transmission control device 1 will be described.

  The data collection unit 11 collects data to be transmitted. For example, data to be transmitted may be sequentially generated at a predetermined timing by a data generation unit (not shown) of the data transmission control device 1. The data collection unit 11 may acquire such data at a predetermined timing. Alternatively, the data collection unit 11 may collect data each time new data is generated.

  The buffer unit 12 accumulates the data collected by the data collection unit 11.

  The data transmission unit 13 transmits the data stored in the buffer unit 12 to the external device 90 via the network. At this time, the data transmission unit 13 uses the bandwidth determined by the transmission control unit 16 for the transmission amount determined by the transmission control unit 16 described later among the data stored in the buffer unit 12. To send.

The buffer accumulation information generation unit 14 generates buffer accumulation information based on the accumulation amount of data accumulated in the buffer unit 12. The buffer accumulation information may be information based on a change rate (buffer accumulation rate) of the accumulation amount (buffer accumulation amount) of data accumulated in the buffer unit 12, for example. For example, the buffer accumulation information generation unit 14 can calculate the buffer accumulation rate using the following equation (1).
[Buffer accumulation rate] = ([Size of newly collected data] + [Size of data already accumulated in the buffer unit 12 and not yet transmitted]) / [Previous buffer accumulation amount]... ( 1)
In equation (1), “/” represents division. [Previous buffer accumulation amount] represents the size of data accumulated in the buffer unit 12 at a predetermined time before the buffer accumulation rate calculation time. Further, the buffer accumulation information generation unit 14 may generate an average value of the buffer accumulation rate in the latest predetermined period as the buffer accumulation information.

  The network load information generation unit 15 generates network load information representing the network load. Here, the network load refers to a network load connecting the data transmission control device 1 and the external device 90. For example, the network load information may be measurement information measured regarding the transmission processing by the data transmission unit 13. The measurement information may be a round trip time (RTT) or a data amount for which transmission is completed per unit time (a reception completion response is received).

  The transmission control unit 16 controls the bandwidth used by the data transmission unit 13 and the future data transmission amount based on the buffer accumulation information and the network load information. For example, the transmission control unit 16 is used for the data transmission unit 13 based on whether the network load information satisfies a predetermined congestion condition and whether the buffer storage information satisfies a predetermined accumulation excess condition. The bandwidth and transmission amount may be controlled. For example, the predetermined congestion condition may be that measurement information as network load information exceeds a threshold value. Further, for example, the predetermined excessive storage condition may be that the buffer storage rate as the buffer storage information exceeds a threshold value.

  Specifically, when the network load information does not satisfy a predetermined congestion condition and the buffer accumulation information satisfies a predetermined accumulation excess condition, the transmission control unit 16 increases a bandwidth larger than the bandwidth determined during the previous transmission process. You may decide. In this case, the transmission control unit 16 may determine a transmission amount larger than the transmission amount determined during the previous transmission process. Further, the transmission control unit 16 may not change the bandwidth applied until the previous time when the network load information does not satisfy the predetermined congestion condition and the buffer accumulation information does not satisfy the predetermined accumulation excess condition. . Moreover, the transmission control part 16 does not need to change the transmission amount applied until the last time. The transmission control unit 16 may determine a bandwidth smaller than the bandwidth determined during the previous transmission process when the network load information satisfies a predetermined congestion condition. In this case, the transmission control unit 16 may determine a transmission amount that is smaller than the transmission amount determined during the previous transmission process.

  The operation of the data transmission control device 1 configured as described above will be described with reference to FIGS.

  First, the data collection operation of the data transmission control device 1 is shown in FIG.

  In FIG. 2, first, the data collection unit 11 collects data to be transmitted (step S1).

  Next, the data collection unit 11 accumulates the collected data in the buffer unit 12 (step S2). As a result, the data stored in the buffer unit 12 without being transmitted in the later-described data transmission control operation and the data newly collected in step S1 in the current operation are stored in the buffer unit 12. The

  The data transmission control device 1 repeats the above operation at a predetermined interval or timing when new data is generated.

  Next, the data transmission control operation of the data transmission control device 1 is shown in FIG.

  In FIG. 3, first, the buffer accumulation information generation unit 14 generates buffer accumulation information based on the data accumulation amount in the buffer unit 12 (step S11). For example, as described above, the buffer accumulation information generation unit 14 may calculate the buffer accumulation rate to obtain buffer accumulation information.

  Next, the network load information generation unit 15 generates network load information (step S12). For example, as described above, the network load information generation unit 15 may measure the measurement information in the previous transmission process by the data transmission unit 13 to obtain the network load information.

  Next, the transmission control unit 16 transmits the bandwidth used by the data transmission unit 13 and the next data transmission based on the buffer accumulation information generated in step S11 and the network load information generated in step S12. The amount is determined (step S13).

  Next, the data transmission unit 13 transmits data for the transmission amount determined in step S13 among the data stored in the buffer unit 12 to the external device 90 using the determined bandwidth. (Step S14).

  The data transmission control device 1 repeats the above operation according to a predetermined interval or a predetermined schedule.

  Next, effects of the first exemplary embodiment of the present invention will be described.

  The data transmission control apparatus according to the first embodiment of the present invention is more capable of collecting data to be transmitted and transmitting the data to the outside without increasing the network load and without a large delay due to control on the apparatus side. Data can be transmitted.

  The reason is that the buffer accumulation information generation unit generates buffer accumulation information related to the amount of data accumulated in the buffer unit, the network load information generation unit generates network load information related to the network load, and the transmission control unit. Determines the next bandwidth and transmission amount based on the buffer accumulation information and the network load information, and the data transmission unit determines the data corresponding to the determined transmission amount from the data accumulated in the buffer unit. This is because the determined bandwidth is transmitted to the outside.

  As a result, when the buffer accumulation amount increases, the data transmission control device as the present embodiment increases the next bandwidth and the transmission amount to reduce the buffer accumulation amount unless the network load is high. Is possible. If the bandwidth and the transmission amount are not changed in a situation where the buffer accumulation amount increases, the data that causes a delay until transmission increases, but in this embodiment, the bandwidth and the transmission amount increase as the buffer accumulation amount increases. It can be controlled to increase the transmission amount. Therefore, this embodiment can transmit more data without a large delay. In addition, the data transmission control device according to the present embodiment reduces network congestion by reducing the next bandwidth and transmission amount when the network load is high. If the bandwidth or transmission amount is unconditionally increased as the buffer storage amount increases, the impact on the network load may increase and the network may be congested. In this embodiment, the network is congested. In some cases, the bandwidth and transmission amount can be controlled to be reduced. Therefore, the data transmission control apparatus as the present embodiment can suppress an increase in network load. As described above, this embodiment can transmit more data without increasing a network load and without a large delay.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to the drawings. Note that, in each drawing referred to in the description of the present embodiment, the same reference numerals are given to the same configuration and steps that operate in the same manner as in the first embodiment of the present invention, and the detailed description in the present embodiment. Description is omitted. In the present embodiment, an example will be described in which, in the data transmission control device of the present invention, a log representing a history of the operation and state of the own device is applied as the data to be transmitted.

  First, FIG. 4 shows a functional block configuration of a data transmission control device 2 as a second embodiment of the present invention. 4, the data transmission control device 2 is different from the data transmission control device 1 as the first embodiment of the present invention in that a data collection unit 21 and a buffer accumulation information generation unit 14 are replaced with the data collection unit 11. Instead of the buffer accumulation information generation unit 24, the network load information generation unit 25 instead of the network load information generation unit 15, and the transmission control unit 26 instead of the transmission control unit 16.

  The data transmission control device 2 is connected to the log collection device 91 via a network constituted by the Internet, a LAN, a public line network, a wireless communication network, or a combination thereof. The log collection device 91 is configured by a computer device including, for example, a CPU, a RAM, a ROM, a storage device such as a hard disk, and a network interface, and receives a log transmitted from the data transmission control device 2. It is. 4 shows the data transmission control device 2 and the log collection device 91 one by one, the data transmission control device and log collection connected to the network to which the data transmission control device of the present invention sends data. The number of devices is not limited.

  Next, details of each functional block of the data transmission control device 2 will be described.

  The data collection unit 21 collects logs to be transmitted. The log is data in which a history of the operation and state of the device is recorded. Such a log is assumed to be sequentially generated by, for example, a log generation unit (not shown) of the data transmission control device 2.

  The buffer accumulation information generation unit 24 generates information representing the influence on the network load caused by sending the log accumulated in the buffer unit 12 as the buffer accumulation information. For example, the buffer accumulation information generation unit 24 may calculate the time required until all the logs accumulated in the buffer unit 12 at that time are transmitted as the buffer accumulation information at the communication throughput at that time. Note that the buffer accumulation information generation unit 24 can calculate such buffer accumulation information based on fluctuations in the buffer accumulation rate. Note that the buffer accumulation information generation unit 24 may add trend information indicating a trend of fluctuations in communication throughput when calculating such buffer accumulation information. Further, the buffer accumulation information generation unit 24 may acquire trend information generated by a technique such as trend analysis as such trend information.

  The network load information generation unit 25 generates information indicating whether or not the network is congested during the next transmission process by the data transmission unit 13 as the network load information. For example, the network load information generation unit 25 may generate such network load information based on a change in measurement information measured with respect to the transmission process executed by the data transmission unit 13. As described above, the measurement information may be RTT or the amount of data that has been transmitted per unit time. In this case, the network load information generation unit 25 may generate network load information based on past measurement information fluctuations by accumulating a history of measurement information.

  Specifically, the network load information generation unit 25 may generate network load information indicating that the network at the time of the next transmission processing is busy if the value of RTT as measurement information continues to increase. Good. In addition, the network load information generation unit 25 generates network load information indicating that the network at the time of the next transmission process is busy if the transmission completion data amount per unit time as measurement information continues to increase. May be.

  The transmission control unit 26 determines whether to perform communication exceeding the usable bandwidth based on the buffer accumulation information and the network load information, and based on the determination result, the bandwidth used by the data transmission unit 13 And determine the amount of log transmission in the future. Here, the usable bandwidth is a bandwidth that is limited in advance to be usable for log transmission processing by the data transmission unit 13. For example, the usable bandwidth may be determined based on the usable bandwidth that is predetermined for the entire log transmission process in all the data transmission control devices 2 connected to the log collection device 91. For example, consider a case where one log collection device 91 and ten data transmission control devices 2 are connected to a network having a bandwidth of 100 Mbps (megabit per second). In this case, it is assumed that a bandwidth of 10 Mbps corresponding to 10% of the entire log transmission processing by all the data transmission control devices 2 is defined. In this case, the usable bandwidth allowed for the log transmission processing of one data transmission control device 2 is 1 Mbps. It should be noted that the percentage of the total usable bandwidth of the entire log transmission process is determined based on the actual bandwidth information used in the past in the network. It is assumed that a value that does not overflow the bandwidth of the entire network is determined even when is used. For example, when the past average of the bandwidth used in the network is 80%, it is unlikely that congestion will occur even if the usable bandwidth of the entire log transmission process is set to 10%. If set, congestion is likely to occur. In this case, the usable bandwidth of the entire log transmission process is set to 10% in advance.

  For example, when the network load information does not satisfy a predetermined congestion condition and the buffer accumulation information satisfies a predetermined accumulation excess condition, the transmission control unit 26 exceeds the usable bandwidth defined for the data transmission unit 13. And the amount of transmission may be determined based on the determined bandwidth.

  Here, in the present embodiment, the network load information is information indicating whether or not the network is congested during the next transmission process. Therefore, in the present embodiment, the predetermined congestion condition may be that the network load information indicates network congestion. Further, in the present embodiment, the buffer accumulation information is information (for example, the time required for transmission) indicating the influence on the network load due to the transmission of the log accumulated in the buffer unit 12. Therefore, in the present embodiment, the predetermined accumulation excess condition may be that the above-described required time or the like as the buffer accumulation information exceeds a threshold value.

  Specifically, the transmission control unit 26 is predetermined as a bandwidth that exceeds the usable bandwidth when the network load information does not satisfy a predetermined congestion condition and the buffer storage information satisfies a predetermined excessive storage condition. A predetermined bandwidth may be determined. For example, when the usable bandwidth of the data transmission unit 13 is defined as 1 Mbps, the transmission control unit 26 determines 2 Mbps as the bandwidth exceeding the usable bandwidth, and determines the transmission amount that can be transmitted at 2 Mbps. May be. In this case, the transmission control unit 26 may determine the transmission amount to be increased step by step for each transmission process while the network load information does not satisfy a predetermined congestion condition.

  In addition, the transmission control unit 26, when the network load information does not satisfy the congestion condition, and the buffer accumulation information does not satisfy the excessive accumulation condition, the bandwidth that does not exceed the usable bandwidth defined in the data transmission unit 13 The transmission amount may be determined based on the determined bandwidth. If the bandwidth that exceeds the usable bandwidth has been determined in the previous transmission process of the data transmitting unit 13, the transmission control unit 26 newly determines a bandwidth that does not exceed the usable bandwidth. If the bandwidth that does not exceed the usable bandwidth has been determined in the previous transmission process of the data transmission unit 13, the transmission control unit 26 does not need to change the bandwidth. Also in this case, the transmission control unit 26 may determine the transmission amount to be increased step by step for each transmission process while the network load information does not satisfy a predetermined congestion condition.

  Further, when the network load information satisfies a predetermined congestion condition, the transmission control unit 26 determines a bandwidth that does not exceed the usable bandwidth and is smaller than the current bandwidth, and performs the transmission based on the determined bandwidth. The amount may be controlled. For example, when the usable bandwidth is 1 Mbps and the previously used bandwidth is 1 Mbps, the transmission control unit 26 may determine a bandwidth of 0.1 Mbps. In this case, the transmission control unit 26 may dynamically determine the transmission amount to be transmitted with the determined bandwidth using trend analysis or the like. For example, the transmission control unit 26 predicts the network load at the time of the next transmission process using the trend information by trend analysis, so that the transmission amount smaller than the current time is dynamically changed according to the predicted network load level. You may decide. Or the transmission control part 26 may determine the transmission amount (for example, 1 byte) of the predetermined small size predetermined in such a case.

  The operation of the data transmission control device 2 configured as described above will be described.

  First, the log collection operation of the data transmission control device 2 will be described. The log collection operation of the data transmission control device 2 is substantially the same as the data collection operation of the data transmission control device 1 as the first embodiment of the present invention described with reference to FIG. However, in the present embodiment, the data collection unit 21 collects, as data, a log in which a history of the operation and state of the data transmission control device 2 is recorded and accumulates it in the buffer unit 12.

  Next, the log transmission control operation of the data transmission control device 2 will be described with reference to FIGS.

  In FIG. 5, first, the buffer accumulation information generation unit 24 is a buffer that represents the influence on the network load caused by sending the log accumulated in the buffer unit 12 based on the fluctuation of the log accumulation rate in the buffer unit 12. Accumulated information is generated (step S21). For example, as described above, the buffer accumulation information generation unit 24 may generate buffer accumulation information indicating the time required for all the logs accumulated in the buffer unit 12 to be sent to the network at the current communication throughput. .

  Next, the network load information generation unit 25 generates network load information indicating whether or not the network is congested during the next transmission process based on the variation in measurement information related to the previous transmission process by the data transmission unit 13. (Step S22).

  Next, the transmission control unit 26, based on the buffer accumulation information generated in step S21 and the network load information generated in step S22, uses the bandwidth and log transmission amount to be used next time by the data transmission unit 13. Is determined (step S23). Details of this step will be described later.

  Next, the data transmission unit 13 transmits logs for the transmission amount determined in step S <b> 23 among the logs accumulated in the buffer unit 12 to the log transmission device 91 using the determined bandwidth. (Step S24).

  The data transmission control device 2 repeats the above operation according to a predetermined interval or a predetermined schedule.

  Next, details of the operation in step S23 are shown in FIG.

  In FIG. 6, first, the transmission control unit 26 determines whether or not the network load information generated in step S22 satisfies a predetermined congestion condition (step S31). That is, the transmission control unit 26 determines whether or not the network load information indicates that the network is congested.

  Here, when it is determined that the predetermined congestion condition is satisfied, the transmission control unit 26 determines a smaller bandwidth within a range not exceeding the usable bandwidth, and determines a transmission amount based on the determined bandwidth. (Step S32). For example, if the usable bandwidth is 1 Mbps, the transmission control unit 26 may determine 0.1 Mbps as a smaller bandwidth within a range not exceeding the usable bandwidth. And the transmission control part 26 may determine the transmission amount of 1 byte as a transmission amount of the log transmitted with a bandwidth of 0.1 Mbps.

  On the other hand, when it is determined that the predetermined congestion condition is not satisfied, the transmission control unit 26 determines whether or not the buffer storage information generated in step S21 satisfies a predetermined excessive storage condition (step S33). That is, the transmission control unit 26 determines whether the value indicated by the buffer accumulation information exceeds the threshold value.

  Here, when it is determined that the predetermined excess storage condition is satisfied, the transmission control unit 26 determines a bandwidth that exceeds the usable bandwidth, and determines a transmission amount based on the determined bandwidth (step S34). . For example, if the usable bandwidth is 1 Mbps, the transmission control unit 26 may determine 2 Mbps as the bandwidth exceeding the usable bandwidth. In this case, while the network load information does not satisfy the predetermined congestion condition and the buffer accumulation information satisfies the predetermined accumulation excess condition, the transmission control unit 26 increases the transmission stepwise every time step S34 is executed. The amount may be determined.

  On the other hand, when it is determined that the predetermined accumulation excess condition is not satisfied, the transmission control unit 26 determines the transmission amount so as not to exceed the usable bandwidth (step S35). For example, if the available bandwidth is 1 Mbps, the transmission control unit 26 may determine 1 Mbps as the bandwidth that does not exceed the available bandwidth. In this case, the transmission control unit 26 increases the network load information stepwise each time step S35 is executed while the network load information does not satisfy the predetermined congestion condition and the buffer accumulation information does not satisfy the predetermined accumulation excess condition. The transmission amount may be determined.

  This is the end of the detailed description of the transmission amount control operation in step S23.

  Next, the effect of the second exemplary embodiment of the present invention will be described.

  The data transmission control device as the second embodiment of the present invention is a device that collects a log to be transmitted and transmits it to the outside when a usable bandwidth for log transmission processing is set. Control allows more logs to be sent without increasing network load and without significant delay.

  The reason is that the transmission control unit determines whether to perform communication exceeding the usable bandwidth based on the buffer accumulation information and the network load information, and based on the determination result, determines whether the next bandwidth and transmission This is because the amount is determined.

  As a result, the data transmission control device according to the present embodiment exceeds the usable bandwidth if the buffer accumulation amount is increased and the network load during the next transmission processing is expected not to be high. By increasing the bandwidth and transmission amount used in the next transmission processing, the buffer accumulation amount can be reduced. As a result, according to the present embodiment, it is possible to reduce logs in which a delay occurs between collection and transmission. In addition, the data transmission control device according to the present embodiment suppresses network congestion by reducing the bandwidth and transmission amount used in the next transmission processing regardless of buffer accumulation information when the network load is high. To do. As described above, according to the present embodiment, even if the usable bandwidth for log transmission processing is set, it is possible to transmit more logs without increasing the network load without increasing the network load.

  In addition, the data transmission control apparatus as the second embodiment of the present invention judges the network load situation and the buffer accumulation situation with higher accuracy, and does not increase the network load, and more logs without a large delay. Can be sent.

  The reason is that the buffer accumulation information generation unit generates buffer accumulation information that represents the effect on the network load when the log accumulated in the buffer unit is sent to the network. This is because network load information indicating whether or not the network load during the next transmission process is high is generated based on the measurement information in the transmission process. As a result, the transmission control unit can more accurately determine whether or not the network load status during the next transmission process is congested, and whether or not the buffer storage status has a great influence on the network load. It becomes possible to determine more accurately. As a result, the transmission control unit can more accurately determine whether or not to perform transmission processing exceeding the usable bandwidth.

  In the embodiment of the present invention, the example in which the data to be transmitted by the data transmission control device is a log has been mainly described. However, the present embodiment is also applicable to the case where other data is to be transmitted. Applicable.

  In each of the embodiments of the present invention described above, the data transmission control device performs the data transmission control operation (operation for determining the bandwidth to be used and the transmission amount) every time the data transmission processing to the outside is executed. Alternatively, one transmission control operation may be performed for a plurality of transmission processes. For example, in the case where the execution interval of transmission processing is long or in an environment where the load situation of the entire network changes frequently, the data transmission control device of each embodiment performs the data transmission control operation every time the data transmission processing is executed. It is desirable. Also, in the case where the execution interval of transmission processing is short or in an environment where the load situation of the entire network does not change much, the data transmission control device of each embodiment performs one transmission control operation for a plurality of transmission processing. May be.

  In each of the embodiments of the present invention described above, the operation of the data transmission control device described with reference to each flowchart is stored in a storage device (storage medium) of the computer device as a computer program of the present invention. The CPU may read and execute the computer program. In such a case, the present invention is constituted by the code of the computer program or a storage medium.

  Moreover, each embodiment mentioned above can be implemented in combination as appropriate.

  The present invention is not limited to the above-described embodiments, and can be implemented in various modes.

A part or all of each of the above-described embodiments can be described as in the following supplementary notes, but is not limited thereto.
(Appendix 1)
A data collection unit that collects data to be transmitted;
A buffer unit for accumulating data collected by the data collection unit;
A data transmission unit for transmitting data accumulated in the buffer unit to the outside via a network;
A buffer storage information generation unit that generates buffer storage information related to the amount of data stored in the buffer unit;
A network load information generation unit for generating network load information related to the network load;
A transmission control unit that controls a bandwidth used by the data transmission unit and a transmission amount of data based on the buffer accumulation information and the network load information;
A data transmission control device comprising:
(Appendix 2)
The transmission control unit determines whether to perform data transmission over an available bandwidth predetermined for the data transmission unit based on the buffer accumulation information and the network load information, and based on the determination result The data transmission control device according to attachment 1, wherein the bandwidth and the transmission amount are controlled.
(Appendix 3)
The transmission control unit determines the bandwidth and the transmission amount based on whether the network load information satisfies a predetermined congestion condition and whether the buffer storage information satisfies a predetermined excessive storage condition. The data transmission control device according to appendix 1 or appendix 2, wherein the data transmission control device is controlled.
(Appendix 4)
The transmission control unit determines a bandwidth that exceeds the usable bandwidth when the network load information does not satisfy a predetermined congestion condition and the buffer accumulation information satisfies a predetermined accumulation excess condition, and determines the determined bandwidth 4. The data transmission control device according to appendix 3, wherein the transmission amount is controlled based on the above.
(Appendix 5)
The transmission control unit determines and determines a bandwidth that does not exceed the usable bandwidth when the network load information does not satisfy a predetermined congestion condition and the buffer accumulation information does not satisfy a predetermined accumulation excess condition. The data transmission control device according to appendix 3 or appendix 4, wherein the transmission amount is controlled based on a bandwidth.
(Appendix 6)
The transmission control unit determines a bandwidth that does not exceed the usable bandwidth and is smaller than the current bandwidth when the network load information satisfies a predetermined congestion condition, and the transmission amount based on the determined bandwidth The data transmission control device according to any one of appendix 3 to appendix 5, wherein the data transmission control device is controlled.
(Appendix 7)
The buffer accumulation information generation unit generates, as the buffer accumulation information, information based on a buffer accumulation rate that represents a rate of change in the accumulation amount of data in the buffer unit. The data transmission control device according to one.
(Appendix 8)
The buffer accumulation information generation unit generates, as the buffer accumulation information, information representing an influence on a network load due to transmission of data accumulated in the buffer unit based on a change in the buffer accumulation rate. The data transmission control device according to appendix 7, characterized by:
(Appendix 9)
The network load information generation unit generates, as the network load information, information based on measurement information measured regarding transmission processing by the data transmission unit, according to any one of appendix 1 to appendix 8 Data transmission control device.
(Appendix 10)
The network load information generation unit generates, as the network load information, information indicating whether or not the network is congested during the next data transmission by the data transmission unit based on a change in the measurement information. And the data transmission control device according to appendix 9.
(Appendix 11)
11. The data transmission control device according to appendix 9 or appendix 10, wherein the network load information generation unit measures a round trip time in transmission processing by the data transmission unit as the measurement information.
(Appendix 12)
The data transmission control device according to appendix 9 or appendix 10, wherein the network load information generation unit measures the amount of data transmitted per unit time by the data transmission unit as the measurement information.
(Appendix 13)
Collect data to be sent and store it in the buffer.
Generating buffer accumulation information related to the accumulation amount of data accumulated in the buffer unit;
Generate network load information about network load,
When transmitting data accumulated in the buffer unit to the outside via the network, the bandwidth used for transmission processing and the transmission amount of data are controlled based on the buffer accumulation information and the network load information. Data transmission control method.
(Appendix 14)
A data collection step for collecting data to be transmitted and storing it in a buffer unit;
A data storage information generation step for generating buffer storage information related to the amount of data stored in the buffer unit;
A network load information generation step for generating network load information relating to the network load;
When transmitting data accumulated in the buffer unit to the outside via the network, the bandwidth used for transmission processing and the transmission amount of data are controlled based on the buffer accumulation information and the network load information. A transmission control step;
Is a computer program that causes a computer device to execute.

1, 2 Data transmission control device 11, 21 Data collection unit 12 Buffer unit 13 Data transmission unit 14, 24 Buffer accumulation information generation unit 15, 25 Network load information generation unit 16, 26 Transmission control unit 90 External device 91 Log collection device

Claims (10)

A data collection unit that collects data to be transmitted;
A buffer unit for accumulating data collected by the data collection unit;
A data transmission unit for transmitting data accumulated in the buffer unit to the outside via a network;
A buffer storage information generation unit that generates buffer storage information related to the amount of data stored in the buffer unit;
A network load information generation unit for generating network load information related to the network load;
A transmission control unit that controls a bandwidth used by the data transmission unit and a transmission amount of data based on the buffer accumulation information and the network load information;
A data transmission control device comprising:   The transmission control unit determines whether to perform data transmission over an available bandwidth predetermined for the data transmission unit based on the buffer accumulation information and the network load information, and based on the determination result The data transmission control device according to claim 1, wherein the bandwidth and the transmission amount are controlled.   The transmission control unit determines the bandwidth and the transmission amount based on whether the network load information satisfies a predetermined congestion condition and whether the buffer storage information satisfies a predetermined excessive storage condition. The data transmission control device according to claim 1, wherein the data transmission control device controls the data transmission control device.   The transmission control unit determines a bandwidth that exceeds the usable bandwidth when the network load information does not satisfy a predetermined congestion condition and the buffer accumulation information satisfies a predetermined accumulation excess condition, and determines the determined bandwidth The data transmission control device according to claim 3, wherein the transmission amount is controlled based on the data.   5. The buffer accumulation information generation unit generates information based on a buffer accumulation rate that represents a rate of change in the amount of data accumulated in the buffer unit as the buffer accumulation information. The data transmission control device according to claim 1.   The buffer accumulation information generation unit generates, as the buffer accumulation information, information representing an influence on a network load due to transmission of data accumulated in the buffer unit based on a change in the buffer accumulation rate. The data transmission control device according to claim 5.   The said network load information generation part produces | generates the information based on the measurement information measured regarding the transmission process by the said data transmission part as said network load information, The any one of Claims 1-6 characterized by the above-mentioned. A data transmission control device according to claim 1.   The network load information generation unit generates, as the network load information, information indicating whether or not the network is congested at the next data transmission by the data transmission unit based on a change in the measurement information. The data transmission control device according to claim 7. Collect data to be sent and store it in the buffer.
Generating buffer accumulation information related to the accumulation amount of data accumulated in the buffer unit;
Generate network load information about network load,
When transmitting data accumulated in the buffer unit to the outside via the network, the bandwidth used for transmission processing and the transmission amount of data are controlled based on the buffer accumulation information and the network load information. Data transmission control method. A data collection step for collecting data to be transmitted and storing it in a buffer unit;
A data storage information generation step for generating buffer storage information related to the amount of data stored in the buffer unit;
A network load information generation step for generating network load information relating to the network load;
When transmitting data accumulated in the buffer unit to the outside via the network, the bandwidth used for transmission processing and the transmission amount of data are controlled based on the buffer accumulation information and the network load information. A transmission control step;
Is a computer program that causes a computer device to execute.

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