WO2019124290A1

WO2019124290A1 - Transmit data volume control device, method, and recording medium

Info

Publication number: WO2019124290A1
Application number: PCT/JP2018/046267
Authority: WO
Inventors: 徹大須賀
Original assignee: 日本電気株式会社
Priority date: 2017-12-22
Filing date: 2018-12-17
Publication date: 2019-06-27

Abstract

In order to enable communication at higher throughput and lower delay over a network in which the allocated amount of communication resources changes in accordance with the communication load, an assessment is made as to the possibility that the allocated amount of communication resources for communication with a host device will be increased as the communication load increases. When the possibility exists that the allocated amount will be increased, the amount of transmission data, which is the amount of communication data to be transmitted in communication with the host device, is increased.

Description

Transmission data amount control device, method and recording medium

The present invention relates to a transmission data amount control apparatus, method and recording medium for controlling the data amount of transmission data.

In recent years, the characteristics of communication networks and required performance requirements have diversified. For example, with the spread of smartphones and tablet terminals, single large-sized moving pictures and Web pages consisting of multiple small-sized contents are communicated via mobile networks with wide bandwidth fluctuations. There is. Moreover, voice communication IP (Internet Protocol) is used to communicate voice traffic which requires a small bandwidth but requires a short delay time. In addition, with the widespread use of various sensor devices, sensor information of a wide range of sizes can be communicated from huge numbers of sensor devices to several bytes of numerical information to video information exceeding 1 MB (megabytes).

In order to respond to these various performance requirements, in recent years, the number of networks in which the allocation amount of communication resources (such as frequency bandwidth) to data transmission devices changes according to the communication load (such as communication flow rate and congestion) increases. It is getting worse.

For example, in a Quality of Service (QoS) -oriented network such as Software Defined Network (SDN), allocation of network resources is adjusted in accordance with the flow rate of data in each communication. This can flexibly meet the required performance requirements.

Further, in carrier aggregation used in LTE (Long Term Evolution) and the like, a plurality of frequency bands are used for communication when the buffer of the base station continues to accumulate for a predetermined amount of time or more. This makes communication faster.

Similarly, in communication with the sensor device, adjust the number of channels to be used, the coding rate, etc. according to the flow rate of the communication, the error rate of the network, etc., so as to satisfy the performance requirements and the power consumption. Is possible.

On the other hand, mainly in the transport layer of communication, transmission rate control is performed in which the amount of data that can be transmitted per unit time (transmission rate) is adjusted according to the network performance. There is. A typical transmission rate control method is TCP (Transmission Control Protocol).

Many of the transmission rate control methods aim at achieving high throughput and short delay times. As shown in FIG. 8, the throughput increases as the transmission rate increases, but when the transmission rate exceeds a certain value, congestion occurs, and the throughput reaches a plateau and the delay time increases. Therefore, in order to achieve high throughput and short delay time, it is important to quickly reach the optimal transmission rate (hereinafter referred to as the optimal rate) and keep using the optimal rate for a long time.

For example, as loss based transmission rate control, there are TCP CUBIC (Non-Patent Document 1), TCP New Reno (Non-Patent Document 2), and the like. In loss-based transmission rate control, it is determined based on packet loss whether or not the network is congested while transmitting data packets, and the transmission rate is increased or decreased in a trial-and-error manner according to the determination result.

Specifically, when an acknowledgment (ACK: ACKnowledgement) packet indicating that the transmitted data packet has normally reached the data receiving apparatus is received, the data transmitting apparatus determines that the network is open and transmits it. Slowly increase the rate. In addition, when a packet loss is detected by a duplicate ACK packet or the like, the data transmission apparatus determines that the network is congested (congested) and greatly reduces the transmission rate. By doing this, the data transmission apparatus can optimize the transmission rate by increasing the transmission rate if the transmission rate is smaller than the optimum rate, and suppressing the transmission rate if the transmission rate is much larger than the optimum rate. It is controlled to stay in the vicinity of the rate.

Further, as a delay-based or performance estimation type transmission rate control method, there are TCP Vegas (Non-Patent Document 3), the methods described in Patent Document 1 to Patent Document 3, and the like. In these methods, while the data transmitting apparatus transmits data packets, it is determined whether the network is congested or not by the length of round trip time (RTT: Round Trip Time) or the length of the queue amount staying in the network. The transmission rate is increased or decreased according to the result.

Specifically, the data transmission apparatus determines that the network is open and increases the transmission rate if the queuing delay or the retention queue amount is smaller than a predetermined threshold or target value. Also, when the queuing delay or the retention queue amount is larger than a predetermined threshold or target value, the data transmission apparatus determines that the network is congested and reduces the transmission rate. By doing this, the data transmission apparatus increases the transmission rate if the transmission rate is smaller than the optimum rate, and suppresses the transmission rate if the transmission rate is larger than the optimum rate to keep the transmission rate at the optimum rate. I am in control.

International Publication No. 2017/119408 JP 2012-222380 A JP, 2006-108955, A

However, in any of the above-described methods, in a network in which the allocation amount of communication resources changes according to the communication load, the data transmission apparatus can not detect the optimum rate correctly, and control to keep the transmission rate at the optimum rate. I can not Therefore, the throughput may decrease and the delay time may increase.

For example, in loss-based transmission rate control, the data transmitting apparatus can determine that the network is free due to no packet loss, but does not know how much it is free. Therefore, the transmission rate is gradually increased by trial and error, and it takes time to reach the optimum rate. Also, even if the delay time exceeds the optimum rate, the data transmission apparatus does not judge that congestion occurs until a packet loss occurs, so the transmission rate continues to increase beyond the optimum rate. As a result, the delay time is increased (FIG. 9).

Also, in a network where the allocation amount of communication resources changes according to the communication load, the communication resources are allocated after the load is applied to the network, so the delay time may increase before the communication resources are allocated, and the throughput may peak. To become

For example, in the case of delay-based or performance estimation type transmission rate control, an increase in delay time and throughput overrun may cause the data transmission apparatus to erroneously recognize that the optimum rate has been reached, and to not further increase the transmission rate. Therefore, it is difficult for the transmission rate to reach the correct optimum rate. Also, even if the transmission rate can reach the optimum rate, if the communication load is accidentally reduced due to fluctuations in cross traffic and the amount of allocated communication resources is reduced, the delay time will increase, so the transmission rate will be further increased. It will be suppressed. As a result, the throughput is reduced (FIG. 10).

If throughput is decreased or delay time is increased, the user's quality of experience is significantly impaired, collection of sensor data is delayed and information necessary for analysis is not available, network load is increased by retransmission packets, etc. An inconvenience arises.

An object of the present invention is a transmission data amount control apparatus, method and recording medium which make it possible to realize high throughput and low delay communication in a network in which the allocation amount of communication resources changes according to communication load. It is to provide.

In order to solve the above-mentioned problems, in one embodiment of the present invention, the transmission data amount control device is allocated to determine the possibility that the allocation amount of communication resources for the communication of the own device is increased according to the increase of communication load. Possibility determination means, transmission data amount determination means for increasing the transmission data amount which is the communication data amount at the time of transmission in the communication of the own device when there is the possibility that the allocation amount is increased. It is characterized by

Further, in another embodiment of the present invention, the transmission data amount control method determines the possibility that the allocation amount of communication resources for the communication of the data transmission apparatus is increased according to the increase of the communication load, and the allocation amount is increased. In the case where there is the possibility of being transmitted, the transmission data amount which is the communication data amount at the time of transmission in the communication of the data transmission apparatus is increased.

Further, in another embodiment of the present invention, the transmission data amount control program stored in the computer readable recording medium causes the computer to increase the allocation amount of communication resources for the communication of the own device according to the increase of the communication load. An assignability determination function that determines the possibility of being sent, and transmission data that increases the amount of transmission data that is the amount of communication data at the time of transmission in the communication of the own device when there is the possibility that the assignment amount is increased It is characterized in that the quantity determination function is realized.

The transmission data amount control apparatus, method, and recording medium of the present invention make it possible to realize higher throughput and lower delay communication in a network in which the allocation amount of communication resources changes according to the communication load.

It is a figure which shows the structural example of the transmission data amount control apparatus of 1st embodiment of this invention. It is a figure which shows the operation example of the transmission data amount control apparatus of 1st embodiment of this invention. It is a figure which shows the structural example of the transmission data amount control system of 2nd embodiment of this invention. It is a figure which shows the structural example of the transmission data amount control apparatus of 2nd embodiment of this invention. It is a figure which shows the operation example of the transmission data amount control apparatus of 2nd embodiment of this invention. It is a figure which shows the operation example of the transmission data amount control apparatus of 2nd embodiment of this invention. It is a figure which shows the operation example of the transmission data amount control apparatus of 2nd embodiment of this invention. It is a figure which shows the operation example of the transmission data amount control apparatus of 2nd embodiment of this invention. It is a figure showing an example of hardware constitutions of each embodiment of the present invention. It is a figure which shows the example of the relationship of a transmission rate and a throughput. FIG. 8 is a diagram showing an example of the relationship between transmission rate and throughput in a network in which the allocation amount of communication resources changes. FIG. 8 is a diagram showing an example of the relationship between transmission rate and throughput in a network in which the allocation amount of communication resources changes.

First Embodiment
A first embodiment of the present invention will be described.

FIG. 1 shows a configuration example of the transmission data amount control device 10 of the present embodiment. The transmission data amount control apparatus 10 of the present embodiment is configured of an allocatable determination unit 11 and a transmission data amount determination unit 12.

The allocation possibility determination unit 11 determines the possibility that the allocation amount of the communication resource for the communication of the own apparatus is increased according to the increase of the communication load. The transmission data amount determination unit 12 increases the transmission data amount, which is the communication data amount at the time of transmission in the communication of the own device, when there is a possibility that the allocation amount is increased.

By configuring the transmission data amount control apparatus 10 in this way, the transmission data amount control apparatus 10 may increase the allocation amount of the communication resource for the communication of the own device according to the increase of the communication load. Increase the amount of data sent. As a result, even if the allocated amount of communication resources changes according to the communication load, the possibility that the optimum rate may increase is estimated, and the transmission rate is increased when the optimum rate may increase. It becomes possible to approach the rate. Then, by bringing the transmission rate closer to the optimum rate, it is possible to realize communication with higher throughput and lower delay. Therefore, it is possible to realize higher throughput and lower delay communication in a network in which the allocation amount of communication resources changes according to the communication load.

Next, FIG. 2 shows an example of the operation of the transmission data amount control apparatus 10 of the present embodiment.

The allocation possibility determination unit 11 determines the possibility that the allocation amount of the communication resource for the communication of the own apparatus is increased according to the increase of the communication load (step S101). The transmission data amount determination unit 12 increases the transmission data amount when there is a possibility that the allocation amount is increased (step S102).

By operating in this manner, the transmission data amount control device 10 increases the transmission data amount when there is a possibility that the allocation amount of communication resources for the communication of the own device may be increased according to the increase of the communication load. Therefore, it is possible to realize higher throughput and lower delay communication in a network in which the allocation amount of communication resources changes according to the communication load.

As described above, in the first embodiment of the present invention, in the transmission data amount control device 10, there is a possibility that the allocation amount of the communication resource for the communication of the own device may be increased according to the increase of the communication load. To increase the amount of data sent. As a result, even if the allocated amount of communication resources changes according to the communication load, the possibility that the optimum rate may increase is estimated, and the transmission rate is increased when the optimum rate may increase. It becomes possible to approach the rate. Then, by bringing the transmission rate closer to the optimum rate, it is possible to realize communication with higher throughput and lower delay. Therefore, it is possible to realize higher throughput and lower delay communication in a network in which the allocation amount of communication resources changes according to the communication load.

Second Embodiment
Next, a second embodiment of the present invention will be described. In the present embodiment, the transmission data amount control apparatus of the first embodiment will be described more specifically.

FIG. 3 shows a configuration example of a transmission data amount control system using the transmission data amount control device 20 of the present embodiment.

The transmission data amount control device 20 is a data transmission device that transmits a requested data by establishing a connection such as TCP or User Datagram Protocol (UDP) to the data reception device 60. For example, a PC (Personal Computer) or a portable terminal corresponds to this.

The transmission data amount control device 20 can be, for example, a content server that holds data requested by a user. It can also be a camera or sensor device that measures information of the surrounding environment and sends the information to the server. For example, it may be a relay server device installed in a network, such as a cache server or a proxy server, which once terminates data communication between the content server and the data receiving device 60.

Note that the transmission data amount control device 20 may be disposed in the middle of the route where the content server transmits data to the data reception device 60. In that case, another network or content server may be behind the transmission data amount control device 20 as viewed from the data reception device 60.

The data receiving device 60 is a receiving device that receives data transmitted from the transmission data amount control device 20 via the network. The data receiving apparatus 60 corresponds to, for example, a PC or a portable terminal. The data receiving apparatus 60 can also be, for example, a server that collects and analyzes camera images and sensor information.

When the data receiving device 60 is a user terminal, the data receiving device 60 transmits a data request to the transmission data amount control device 20 or the content server. Further, when the data receiving device 60 receives a data packet from the transmission data amount control device 20, the data receiving device 60 transmits an ACK packet corresponding to the data packet to the transmission data amount control device 20. Then, when the requested data is distributed from the transmission data amount control device 20 or the content server, the distributed data is presented to the user.

When the data receiving apparatus 60 is a server that collects and analyzes information, the data receiving apparatus 60 transmits an ACK packet corresponding to the data packet when the data packet is received from the transmission data amount control apparatus 20. It transmits to the control device 20. Then, when a camera image or sensor information is received from the transmission data amount control device 20 or the camera or sensor device, analysis of information is performed.

Next, FIG. 4 shows a configuration example of the transmission data amount control device 20 of the present embodiment. In FIG. 4, the communication quality acquisition unit 23, the congestion degree estimation unit 24, the target congestion degree determination unit 25, and the data transmission / reception unit 26 are added to the transmission data amount control device 10 (FIG. 1).

Also, the communication quality acquisition unit 23 acquires the communication quality of the communication between the transmission data amount control device 20 and the data reception device 60. The congestion degree estimation unit 24 estimates the congestion degree of communication between the transmission data amount control device 20 and the data reception device 60. The target congestion degree determination unit 25 determines a target congestion degree that is a target value of the communication congestion degree. The data transmission / reception unit 26 transmits / receives data in accordance with the transmission data amount determined by the transmission data amount determination unit 12.

In the present embodiment, the transmission data amount determination unit 12 determines the transmission data amount based on the congestion degree estimated by the congestion degree estimation unit 24 and the target congestion degree determined by the target congestion degree determination unit 25. Then, the transmission data amount determination unit 12 increases the transmission data amount when there is a possibility that the allocation amount of the communication resource is increased.

In the present embodiment, as an example, a method of using the congestion degree and the target congestion degree in determining the transmission data amount before the increase (the transmission data amount when there is no possibility that the communication resource allocation amount is increased) Will be explained. However, any method can be used to determine the amount of transmission data before the increase. For example, it is possible to use the methods described in the background art.

Next, each part of the transmission data amount control device 20 will be described in more detail.

First, the communication quality acquisition unit 23 will be described. The communication quality acquisition unit 23 acquires the communication quality of the communication between the transmission data amount control device 20 and the data reception device 60. In the communication quality acquisition unit 23, communication used by at least one of the congestion degree estimation unit 24, the target congestion degree determination unit 25, the allocation possibility determination unit 11, the transmission data amount determination unit 12, and the data transmission and reception unit 26 in the latter stage. Get quality.

Specific examples of communication quality are listed below. The communication quality acquisition unit 23 acquires one or more of these pieces of information.
-Round trip time of communication between transmission data amount control unit 20 and data receiving unit 60-Time when ACK packet was received-Reception time interval of ACK packet (difference value of reception time of previous and current ACK packet)
-Amount of data newly acknowledged by ACK packet-Amount of data in transmission (data packet already transmitted and not acknowledged by ACK packet)
-Occurrence rate of duplicate ACKs indicating loss of data packet or out of order-Incidence rate of data packet loss (packet loss rate)
In addition, observation values of the above information at a specific time in the past are stored, and the accumulated value, the average value, the variance, the standard deviation, the maximum value, the minimum value, or the difference value between the maximum value and the minimum value You may get one or more pieces of information. Further, information obtained by adding statistical processing such as a filter method for removing the influence of instantaneous fluctuation to the above information or an exponential moving average may be acquired.

Next, the congestion degree estimation unit 24 will be described. The congestion degree estimation unit 24 estimates the congestion degree of communication between the transmission data amount control device 20 and the data reception device 60.

As the degree of congestion, any index may be used as long as it can estimate the size of communication congestion. For example, it is possible to determine that the communication is congested as the amount of staying data related to the data transmitted by the transmission data amount control device 20 staying in the network devices constituting the network is large. Therefore, it is possible to use the amount of stagnant data regarding the data transmitted by the transmission data amount control device 20 or the amount of increase of the amount of stagnant data as the congestion degree. In the present embodiment, the case where the amount of stagnant data is used as the degree of congestion will be described hereinafter.

Next, a method of estimating the amount of stagnant data will be described.

The stagnant data is data that is stagnated in a buffer present in a network device such as a router or switch, a gateway device, or a base station device that configures the network. Further, non-dwelling data is data transmitted through the network without staying in a buffer existing in the network devices constituting the network.

The in-transmission data amount is the data amount of data transmitted from the transmission data amount control device 20 but not yet received an ACK packet. The in-transmission data can be divided into stagnant data staying in the network device and non-dwelling data in transit without stagnating. Therefore, the amount of stagnant data can be estimated by subtracting the amount of non-dwelling data from the amount of data being transmitted.

Next, an example of a method of estimating the non-dwelling data amount will be described.

Since non-dwelling data is being transmitted, it can be considered that an ACK packet can be received by the propagation delay time. Therefore, in the congestion degree estimation unit 24 of the present embodiment, the amount of data to be received and confirmed by the propagation delay time, that is, the estimated value of the wireless band (band estimated value) and the estimated value of the propagation delay time (delay estimated amount) The amount of non-dwelling data can be estimated by calculating the product of

The wireless band is the amount of transmission data per unit time. Specifically, it can be estimated by dividing the amount of data that has been received and confirmed in a predetermined period by the elapsed time (reception time interval) required to receive the data. The predetermined period may be a predetermined time interval, or may be the number of received ACK packets.

The amount of data that has been acknowledged for reception in a predetermined period can be estimated, for example, by calculating the amount of data for which acknowledgment has been newly acknowledged by the ACK packet received in the predetermined period. Also, a value obtained by adding statistical processing such as exponential moving average to this data amount may be used as the data amount of reception confirmation.

The reception time interval can be obtained, for example, by subtracting the reception time of the oldest ACK packet from the reception time of the newest ACK packet among the ACK packets received by the data transmission / reception unit 26 in a predetermined period. Also, a value obtained by adding statistical processing such as exponential moving average to this reception time interval may be used as the reception time interval.

The propagation delay time can be estimated by calculating the minimum value or the exponential moving average value of the round trip delay time of the communication between the transmission data amount control device 20 and the data reception device 60.

In addition, a filter method that eliminates the influence of instantaneous fluctuation may be applied to the above-described band estimation value and / or delay estimation value. (Note that “A or / and B” means at least one of A and B (one or more).) Also, the band estimate value or / and the delay estimate value in the past fixed time are stored Alternatively, one or more values of cumulative value, average value, variance, standard deviation, maximum value, minimum value, or difference value between maximum value and minimum value may be used. Also, it is possible to use a value obtained by adding a band estimation value and / or a delay estimation value to a filtering method for eliminating the influence of instantaneous fluctuation or statistical processing such as exponential moving average.

The amount of stagnant data can be estimated, for example, by subtracting the amount of non-dwelling data from the amount of in-transmission data acquired by the communication quality acquisition unit 23.

In addition, it is also possible to estimate the degree of congestion as a value obtained by subtracting the amount of non-dwelling data from the amount of data transmitted in the past fixed period, with the congestion degree as the increase in the amount of transmitting data in the fixed period in the past. Also, the degree of congestion is the amount of data being transmitted, the amount of data stagnating within the past fixed period or the amount of data being transmitted, the amount of decrease in arrival frequency of ACK packets, the amount of decrease in radio bandwidth, the incidence of packet loss, or , And may be increased amounts of RTT.

Next, the target congestion degree determination unit 25 will be described. The target congestion degree determination unit 25 determines a target congestion degree that is a target value of the congestion degree based on the communication quality. As the degree of congestion here, an index of the same measure as the degree of congestion estimated by the above-mentioned degree of congestion estimation unit 24 is used. The target congestion degree is a congestion degree to be a target when the transmission data amount determination unit 12 determines the upper limit value of the transmission data amount.

An example of how to determine the target congestion degree is given below. In the present embodiment, the target congestion degree is increased as the fluctuation amount of the communication quality is larger.

For example, the variance, standard deviation, or the difference between the maximum value and the minimum value in the past fixed period of the congestion degree estimated by the congestion degree estimation unit 24 is set as the variation amount, and the product of the variation amount and the predetermined coefficient is set as the target congestion degree Can. By doing this, it becomes possible to index the fluctuation amount of communication quality and to increase the target congestion degree according to the increase of the fluctuation amount.

Further, after removing an abnormal value (a value largely deviated) by the existing statistical processing from the value in the past fixed period of the congestion degree estimated by the congestion degree estimation unit 24, the difference between the variance, standard deviation or maximum value and minimum value The variation amount may be calculated by calculating In addition, the target congestion degree may be calculated based on a value obtained by calculating the index moving average on the variation calculated a plurality of times.

Further, the variance, the standard deviation, or the difference between the maximum value and the minimum value in the past fixed period of the ACK packet reception interval may be used as the variation amount. For example, starting from a predetermined initial value, the increase in the target congestion degree is increased as the fluctuation amount is larger, and the increase in the target congestion degree is reduced as the fluctuation is smaller (the target congestion degree may be reduced). The target congestion degree may be determined according to the broad monotonous increasing function. In this way, the target congestion degree can be determined based on the amount of change in the reception interval of the ACK packet.

Also, by analyzing the degree of stability of temporal change of congestion degree from the tendency or correlation of multiple congestion degrees in a fixed period in the past, the fluctuation amount of congestion degree is calculated, and the target congestion degree is determined by the stability degree (variation amount) You may. For example, the target congestion degree is determined according to a predetermined broad monotonous decreasing function that the target congestion degree is reduced as the stability degree is smaller (the variation amount is smaller) and the target congestion degree is increased as the stability degree is smaller (the variation amount is larger). It is good. Also, the degree of stability may be calculated, for example, according to an existing method of testing for stationarity such as unit root test, cointegration test, analysis of autocovariance, and the like.

In addition, the target congestion degree may be determined based on communication quality such as RTT or packet loss rate, instead of the fluctuation amount of communication quality. For example, starting from a predetermined initial value, the larger the RTT or packet loss rate, the smaller the increase in target congestion (which may decrease the target congestion), and the smaller the increase in target congestion, the smaller the target congestion. The target congestion degree may be determined according to a predetermined broad monotonous decreasing function. In this method, when the delay and the packet loss rate are large, the target congestion degree is reduced by regarding it as a state in which the possibility of lowering the quality of sensation increases. Therefore, it is possible to improve the quality of experience of the user.

Next, the assignment possibility determination unit 11 will be described.

The assignability determination unit 11 determines the possibility (assignability) that the assignment amount of the communication resource for the communication of the own device is increased according to the increase of the communication load. As described above, there is a network that changes the allocation amount of communication resources allocated to a communication session according to the communication load. The allocatable determination unit 11 estimates the possibility of increasing the allocation amount of communication resources for the communication session of the own device in such a network.

The allocation amount of the communication resource is the capacity of the transmission path allocated to the communication session, and is, for example, frequency bandwidth, number of channels, number of paths, number of bearers, transmission speed, communication performance, and the like. Communication resources may be shared by multiple communication sessions. However, in this case, the allocated amount of the communication resource is not the amount excluding the communication resource used by the other communication session but the amount including the communication resource shared with the other communication session.

In a network in which the allocation amount of communication resources changes according to the communication load, the allocation amount of communication resources is increased when the communication load increases. Therefore, the allocatable availability determination unit 11 determines the allocatable availability when the communication load increases beyond a predetermined value. More specifically, when the congestion degree estimated by the congestion degree estimation unit 24 is equal to or higher than a predetermined threshold value, the allocation possibility determination unit 11 determines the allocation possibility.

Next, a method of determining the assignment possibility will be described. The method of determining the assignment possibility is roughly divided into the following two methods.
(1) The determination is made based on the maximum value of the communication resource allocation amount and the current allocation amount (current value).
(2) A determination is made based on a phenomenon specific to a network in which the allocation amount of communication resources changes according to the communication load.
The assignment possibility determination unit 11 may use one of the methods (1) and (2), or may use both methods in combination.

First, (1) (a method of determining based on the maximum value and the current value of the allocation amount of communication resources) will be described.

The allocated amount of communication resources is likely to be increased if the communication load is high and there are remaining communication resources that can be allocated. Therefore, in the method of (1), whether the allocatable communication resource remains or not is determined by the difference between the maximum value of the allocatable communication resource and the current value of the allotment amount of the communication resource. Determine based on. More specifically, the allocatable determination unit 11 determines that the difference between the maximum value of the allocatable communication resources and the current value of the allocation amount of communication resources, or the ratio of the difference to the maximum value is equal to or more than a predetermined value. , It is determined that there is a possibility of assignment.

The assignability determination unit 11 can determine, for example, the maximum value of the allocatable communication resources based on the specification of the communication scheme being used. For example, in the case of the carrier aggregation scheme of LTE, 150 Mbps (bits per second) or three channels, and in the case of LoRa (registered trademark), about 22 kbps or five channels are the maximum values. The maximum value of allocatable communication resources is stored in a memory or the like mounted on the transmission data amount control device 20, and can be acquired by reading from the memory or the like.

Alternatively, the allocatable availability determination unit 11 can also estimate the maximum value of allocatable communication resources, for example, based on the history of allocation amounts in a predetermined period. For example, it is possible to estimate the maximum value of the allocation amount in a predetermined period as the maximum value of communication resources that can be allocated. Note that the allocation possibility determination unit 11 estimates the maximum value of the allocatable communication resources after adding statistical processing such as a filter method for eliminating the influence of instantaneous fluctuations to the history of allocation amounts. good.

Further, with regard to the current value of the allocation amount, when the lower layer (the layer lower than the hierarchy of the allocation possibility determination portion 11) recognizes the current value of the allocation amount, the allocation possibility determination portion 11 It is possible to get directly from the layer.

Alternatively, the allocatable determination unit 11 can also estimate the current value of the allocated amount based on the communication quality measured by the communication quality acquisition unit 23. The assignment possibility determination unit 11 can estimate the current value of the assignment amount, for example, based on the measured throughput and statistical information of the throughput.

Alternatively, the allocatable determination unit 11 can estimate the current value of the allocation amount based on the result of reordering in the lower layer. In the case where the lower layer divides the data packet into constituent units smaller than the packet size and transmits using a plurality of bearers, if there is a bearer with a bad communication status, data passing through the bearer will be delayed or lost. When a delay or loss occurs in the received data, the receiving device re-arranges the data after waiting for the delayed data or the missing data to arrive. Since the tendency of occurrence of delay or loss differs for each bearer, the number of bearers can be estimated by observing the tendency. Therefore, for example, it is possible to measure the number of data arriving at the receiving side collectively, the number of data in which an order error has occurred, etc., and estimate the number of bearers (or the number of channels, the number of routes, etc.) based on the measurement result. It is.

Alternatively, the allocatable determination unit 11 can transmit a probe packet to estimate the current value of the allotment amount. In this case, for example, the assignability determination unit 11 causes the data transmission / reception unit 26 to transmit a plurality of probe packets with small packet sizes. Then, as in the case of reordering, it is possible to estimate the number of bearers and the like based on the number of packets arriving at the receiving side collectively and the number of packets in which an order error has occurred.

Alternatively, the allocatable determination unit 11 models the distribution of delay time and loss rate for each number of parallel paths in the lower layer, compares the observed delay time and loss rate distribution with the model, and It is also possible to estimate the current value. As a whole, the measured values of delay time and loss rate appear to be smaller (stable) as the number of paths increases. Therefore, it is possible to estimate the number of paths by modeling in advance the relationship between the number of paths and the distribution of delay times and loss rates, and comparing the observed distribution of delay and loss rates with the model. .

Next, (2) (a method of determining based on a phenomenon specific to a network in which the allocation amount of communication resources changes according to the communication load) will be described.

In a network where the allocated amount of communication resources changes according to the communication load, the allocated amount of communication resources is reduced when the communication load decreases, but when the communication load increases due to the decreased allocated amount of communication resources , The allocation of communication resources is increased. At this time, although the transmission data amount control device 20 reduces the transmission rate due to the reduction of the communication load, a phenomenon occurs in which the delay time rapidly increases due to the reduction of the allocation amount of the communication resource. Therefore, the allocation possibility determination unit 11 can determine that there is an allocation possibility when the delay time increases when the transmission rate is reduced.

Alternatively, when the decrease in throughput and the increase in delay time occur, the assignability determination unit 11 can also determine that there is a possibility of assignment if the time variation of the subsequent throughput and delay time is small. .

As described above, in a network in which the allocation amount of communication resources changes according to the communication load, the allocation amount of communication resources is reduced when the communication load decreases, but the communication load is reduced due to the reduction of the communication resource allocation amount. In the case of an increase, the allocated amount of communication resources is increased. At this time, although the throughput decreases as the transmission data amount control device 20 reduces the transmission rate due to the decrease of the communication load, the phenomenon that the delay time rapidly increases due to the reduction of the allocation amount of the communication resource occurs. Therefore, when a decrease in throughput and an increase in delay time occur, it can be considered that the allocation possibility is high.

However, when there are other communication devices sharing the allocated communication resources, the time fluctuation of throughput and delay time becomes large because of the influence of cross traffic. Therefore, when the time variation of throughput and delay time is large, even if the decrease in throughput and the increase in delay time occur, the cause may be the influence of cross traffic, not the reduction of communication resource allocation. Is high. On the contrary, when the throughput decreases and the delay time increases, and the time variation of the throughput or the delay time is small, the allocated amount of communication resources is likely to be increased. Therefore, the allocatable possibility determination unit 11 can determine that there is an allocatable possibility when the decrease in throughput and the increase in delay time occur and the time variation of the throughput and the delay time is small.

Next, the transmission data amount determination unit 12 will be described. The transmission data amount determination unit 12 determines the transmission data amount based on the congestion degree, the target congestion degree, and the possibility (allocation possibility) that the allocation amount of communication resources is increased. In the present embodiment, the transmission data amount determination unit 12 first determines the transmission data amount based on the congestion degree and the target congestion degree. Then, when there is a possibility of allocation, the amount of transmission data is increased.

The transmission data amount can be, for example, an upper limit value of the transmission data amount, such as a congestion window size (cwnd). The upper limit value is the set value (SO_SNDBUF) of the transmission buffer size of the communication connection, the memory size usable for communication set as a system parameter (tcp_wmem), and the reception window size (RWIN) notified by the ACK packet. It is good. Hereinafter, the case of determining the upper limit value of the transmission data amount as the transmission data amount will be described.

An example of the method of determining the amount of transmission data based on the congestion degree and the target congestion degree will be described below. The degree of communication congestion increases as the amount of transmission data increases. Therefore, the congestion degree can be made close to the target congestion degree by increasing the transmission data amount when the congestion degree is smaller than the target congestion degree and reducing the transmission data amount when the congestion degree is larger than the target congestion degree.

For example, a value obtained by subtracting the congestion degree from the target congestion degree is multiplied by a predetermined coefficient (or raised by a predetermined index), and a value added to the current upper limit value is determined as a new upper limit value. In this way, it is possible to reduce the upper limit value of the transmission data amount when the congestion degree is larger than the target congestion degree, and to increase the upper limit value when the congestion degree is smaller than the target congestion degree.

Alternatively, the sum of one or more past histories of values obtained by subtracting the congestion degree from the target congestion degree may be multiplied by a predetermined coefficient, and a value obtained by adding to the current upper limit may be used as a new upper limit. Further, a value obtained by subtracting the degree of congestion from the target degree of congestion calculates the number of calculations or unit change amount per time between the latest value and the predetermined number of times of calculation or the past value and multiplies the predetermined coefficient A value added to the current upper limit may be used as a new upper limit. Also, a new upper limit may be determined by combining any two or more of the above-described upper limit determination methods.

Also, for example, when the upper limit value is cwnd, it may be combined with the existing TCP cwnd increase / decrease method such as CUBIC TCP (Non-Patent Document 1) or TCP New Reno (Non-Patent Document 2). For example, a function may be added to the existing increase / decrease method so as to increase the amount of increase in cwnd and decrease the amount of decrease as the value obtained by subtracting or dividing the degree of congestion from the target degree of congestion increases. By doing this, it is possible to bring the degree of congestion closer to the target degree of congestion more quickly.

Next, an example of a method of increasing the amount of transmission data when there is an allocation possibility will be described below. The amount of transmission data when there is no allocatable is the amount of transmission data determined based on the congestion degree and the target congestion degree. The assignment possibility determination unit 11 increases the amount of transmission data when there is an assignment possibility.

When the increase in the allocation is known in advance, such as when the increase in allocation is performed in units of channels, the allocation possibility determination unit 11 increases the allocation by the amount of transmission data when there is no allocation possibility. It is good to determine the amount of transmission data when there is a possibility of allocation by adding.

When the increase amount of the allocation amount is unknown, the allocation possibility determination unit 11 determines the transmission data amount when there is no allocation possibility that the difference between the maximum value of the allocation amount and the current value is multiplied by a predetermined ratio. It may be added to the transmission data amount when there is a possibility of allocation. At this time, the predetermined ratio may be a predetermined value or may be a value that fluctuates depending on the current value of the allocation amount. Also, the predetermined ratio is 0 or more, but may be a value exceeding 1 (100%).

When the allocation possibility determination method is (2), the transmission rate and throughput can be allocated by the above method with the maximum value before the phenomenon occurs and the current value after the phenomenon occurs. The amount of transmission data in a given case may be determined.

In the present embodiment, the method of increasing the transmission data amount determined by the transmission data amount determination unit 12 when there is an allocation possibility has been described. However, the transmission data amount control device 20 may be configured to increase the target congestion degree determined by the target congestion degree determination unit 25 when there is an allocation possibility.

Next, the data transmission / reception unit 26 will be described. The data transmission / reception unit 26 transmits / receives data in accordance with the transmission data amount (the amount of transmittable data packets) determined by the transmission data amount determination unit 12. The data transmitting / receiving unit 26 transmits a data packet to the data receiving apparatus 60 via the network, and receives an acknowledgment (ACK) packet.

By configuring the transmission data amount control device 20 in this way, the transmission data amount control device 20 may increase the allocation amount of the communication resource for the communication of the own device according to the increase of the communication load. Increase the amount of data sent. As a result, even if the allocated amount of communication resources changes according to the communication load, the possibility that the optimum rate may increase is estimated, and the transmission rate is increased when the optimum rate may increase. It becomes possible to approach the rate. Then, by bringing the transmission rate closer to the optimum rate, it is possible to realize communication with higher throughput and lower delay. Therefore, it is possible to realize higher throughput and lower delay communication in a network in which the allocation amount of communication resources changes according to the communication load.

Next, FIG. 5A to FIG. 5C and FIG. 6 show an operation example of the transmission data amount control device 20 of the present embodiment. FIG. 6 is a more specific operation example of step S204 of FIG. 5B.

First, the communication quality acquiring unit 23 acquires the communication quality of the network when the data transmitting / receiving unit 26 receives an ACK packet from the data receiving apparatus 60 or at regular intervals (step S201 in FIG. 5A).

The congestion degree estimation unit 24 estimates the congestion degree when the data transmission / reception unit 26 receives an ACK packet from the data reception device 60 or at regular intervals (step S202 in FIG. 5B).

Further, the target congestion degree determining unit 25 determines the target congestion degree based on the communication quality when the data transmitting / receiving unit 26 receives an ACK packet from the data receiving apparatus 60 or at regular intervals (step S203).

Then, the transmission data amount determination unit 12 determines the transmission data amount based on the congestion degree and the target congestion degree when the congestion degree estimation unit 24 estimates the congestion degree or at regular intervals (step S204).

When the data transmitting / receiving unit 26 receives a data request message from the data receiving apparatus 60, it transmits a packet of requested data to the data receiving apparatus 60 according to the transmission data amount determined by the transmission data amount determining unit 12 (see FIG. 5C step S205).

Here, when the transmission data amount control device 20 is a content server, the data transmission / reception unit 26 transmits data according to the transmission data amount determined by the transmission data amount determination unit 12 since all the original data is held by itself. Can. When the transmission data amount control device 20 is a relay server device, it is preferable to store the original data as a cache in advance in its own storage area or to temporarily store the data stream received from the origin server in a buffer. By doing this, the data transmission / reception unit 26 transmits data according to the transmission data amount determined by the transmission data amount determination unit 12 without depending on the network throughput between the origin server and the transmission data amount control device 20. It becomes possible.

Further, in step S204, the transmission data amount control device 20 determines the transmission data amount as follows.

First, the transmission data amount determination unit 12 determines the transmission data amount based on the congestion degree and the target congestion degree (step S301 in FIG. 6).

In addition, when the congestion degree estimated in step S202 is equal to or higher than the threshold (YES in step S302), the allocation possibility determination unit 11 determines the possibility that the allocation amount of communication resources is increased (step S303).

Then, when there is a possibility that the allocation amount of communication resources may be increased (YES in step S304), the transmission data amount determination unit 12 increases the increase amount determined in step S301 (step S305).

Steps S302 and S303 may be performed before the execution of step S301.

More specifically, first, the allocation possibility determination unit 11 determines the possibility that the allocation amount of communication resources is increased when the congestion degree estimated in step S202 is equal to or higher than the threshold (YES in step S302). (Step S303). Further, when the congestion degree is less than the threshold (NO in step S302), the allocatable availability determination unit 11 determines that there is no allocatable. Then, the transmission data amount determination unit 12 determines the transmission data amount based on the congestion degree and the target congestion degree (step S301), and increases the transmission data amount when there is an allocation possibility (YES in step S304) S305).

Alternatively, first, when the degree of congestion estimated in step S202 is equal to or higher than the threshold (YES in step S302), the allocatable availability determination unit 11 determines the possibility that the allocated amount of communication resources is increased (step S303). ). Then, when there is an allocation possibility (YES in step S304), the transmission data amount determination unit 12 determines the transmission data amount based on the congestion degree and the target congestion degree (step S301), and increases the transmission data amount (step S301) S305). When the degree of congestion is less than the threshold (NO in step S302) or when there is no possibility of congestion (NO in step S304), the transmission data amount determination unit 12 transmits data based on the degree of congestion and the target degree of congestion The amount is determined (step S301).

By operating in this manner, the transmission data amount control device 20 increases the amount of transmission data when there is a possibility that the allocation amount of communication resources for the communication of the own device may be increased according to the increase of the communication load. Therefore, it is possible to realize higher throughput and lower delay communication in a network in which the allocation amount of communication resources changes according to the communication load.

The above description is based on the assumption that the protocol of the transport layer is TCP. However, the transmission data amount control device of the present embodiment is also applicable to a transmission data amount control device using a protocol different from TCP such as UDP.

As described above, in the second embodiment of the present invention, in the transmission data amount control device 20, there is a possibility that the allocation amount of the communication resource for the communication of the own device may be increased according to the increase of the communication load. To increase the amount of data sent. As a result, even if the allocated amount of communication resources changes according to the communication load, the possibility that the optimum rate may increase is estimated, and the transmission rate is increased when the optimum rate may increase. It becomes possible to approach the rate. Then, by bringing the transmission rate closer to the optimum rate, it is possible to realize communication with higher throughput and lower delay. Therefore, it is possible to realize higher throughput and lower delay communication in a network in which the allocation amount of communication resources changes according to the communication load.

[Hardware configuration example]
A configuration example of hardware resources for realizing the transmission data amount control device (10, 20) in each embodiment of the present invention described above using one information processing device (computer) will be described. Note that the transmission data amount control device may be realized physically or functionally using at least two information processing devices. Also, the transmission data amount control device may be realized as a dedicated device. Further, only a part of the function of the transmission data amount control device may be realized using the information processing device.

FIG. 7 is a view schematically showing an example of the hardware configuration of an information processing apparatus capable of realizing the transmission data amount control apparatus of each embodiment of the present invention. The information processing device 90 includes a communication interface 91, an input / output interface 92, an arithmetic device 93, a storage device 94, a non-volatile storage device 95, and a drive device 96.

The communication interface 91 is communication means for the transmission data amount control device of each embodiment to communicate with an external device in a wired or / and wireless manner. When the transmission data amount control device is realized using at least two information processing devices, those devices may be connected so as to be able to mutually communicate via the communication interface 91.

The input / output interface 92 is a man-machine interface such as a keyboard as an example of an input device or a display as an output device.

The arithmetic unit 93 is an arithmetic processing unit such as a general-purpose central processing unit (CPU) or a microprocessor. Arithmetic unit 93 can, for example, read various programs stored in nonvolatile storage device 95 into storage device 94 and execute processing in accordance with the read program.

The storage device 94 is a memory device such as a random access memory (RAM) that can be referred to from the arithmetic device 93, and stores programs, various data, and the like. The storage device 94 may be a volatile memory device.

The non-volatile storage device 95 is, for example, a non-volatile storage device such as a read only memory (ROM) or a flash memory, and can store various programs, data, and the like.

The drive device 96 is, for example, a device that processes reading and writing of data to a recording medium 97 described later.

The recording medium 97 is any recording medium capable of recording data, such as an optical disc, a magneto-optical disc, a semiconductor flash memory, and the like.

In each embodiment of the present invention, for example, the transmission data amount control device is configured by the information processing device 90 illustrated in FIG. 7, and the function described in each embodiment can be realized for this transmission data amount control device. It may be realized by supplying the following program.

In this case, it is possible to realize the embodiment by the arithmetic device 93 executing the program supplied to the transmission data amount control device. Further, not all of the transmission data amount control devices but some of the functions can be configured by the information processing device 90.

Furthermore, the program may be recorded in the recording medium 97, and the program may be appropriately stored in the non-volatile storage device 95 at the shipping stage or operation stage of the transmission data amount control apparatus. In this case, as the method of supplying the program, a method of installing in the transmission data amount control apparatus using an appropriate jig at the manufacturing stage or the operation stage before shipping may be adopted. Further, the program supply method may adopt a general procedure such as a method of downloading from the outside via a communication line such as the Internet.

Some or all of the above embodiments may be described as in the following appendices, but are not limited to the following.

(Supplementary Note 1)
Allocation possibility determination means for determining the possibility that the allocation amount of the communication resource for the communication of the own device is increased according to the increase of the communication load;
Transmission data amount determining means for increasing the amount of transmission data, which is the amount of communication data at the time of transmission in the communication of the own device, when there is the possibility that the allocated amount is increased Quantity control device.

(Supplementary Note 2)
The transmission data amount control device according to claim 1, wherein the assignability determination means determines the possibility when the communication load of the communication is equal to or more than a predetermined value.

(Supplementary Note 3)
The transmission data amount control device according to appendix 1 or 2, wherein the assignability judging means judges that the possibility exists when the delay time increases when the transmission rate is lowered. .

(Supplementary Note 4)
The assignment possibility determination unit determines that there is a possibility when a decrease in throughput and an increase in delay time occur and the time variation of the throughput or / and the delay time is small. The transmission data amount control device according to any one of supplementary notes 3 to 3.

(Supplementary Note 5)
The allocatable determination unit determines whether the difference between the maximum value of the allocatable communication resources and the current value of the allotment amount of the communication resources, or the ratio of the difference to the maximum value is a predetermined value or more. The transmission data amount control device according to any one of appendixes 1 to 4, wherein it is determined that the possibility exists.

(Supplementary Note 6)
The amount of transmission data according to claim 5, wherein the allocatable determination unit determines the maximum value based on any one or more of a specification of a communication scheme of the communication and a history of the allotment amount. Control device.

(Appendix 7)
The assignability determination means models distribution of delay time and loss rate for each number of parallel paths as a result of transmission of a probe packet as a result of communication quality of the communication and reordering in a lower layer. The transmission data amount control apparatus according to any one of appendices 5 and 6, wherein the current value is determined based on one or more of them.

(Supplementary Note 8)
When increasing the transmission data amount, the transmission data amount determination means multiplies the transmission data amount before the increase by a predetermined ratio of the increase amount of the allocation amount and the difference between the maximum value of the allocation amount and the current value. The transmission data amount control apparatus according to any one of appendices 1 to 7, wherein one of the transmission rate and the reduction rate of the transmission rate or the throughput multiplied by a predetermined rate is added.

(Appendix 9)
Determine the possibility that the allocation amount of communication resources for the communication of the data transmission apparatus may be increased as the communication load increases.
A transmission data amount control method comprising: increasing a transmission data amount which is a communication data amount at the time of transmission in the communication of the data transmission apparatus, when there is the possibility that the allocation amount is increased.

(Supplementary Note 10)
The transmission data amount control method according to appendix 9, wherein the possibility is determined when the communication load of the communication is equal to or more than a predetermined value.

(Supplementary Note 11)
The transmission data amount control method according to appendix 9 or 10, wherein it is determined that the possibility exists when the delay time increases when the transmission rate is lowered.

(Supplementary Note 12)
It is determined that the possibility exists when a decrease in throughput and an increase in delay time occur and the time variation of the throughput or / and the delay time is small. Quantity control method.

(Supplementary Note 13)
It is determined that the possibility exists when the difference between the maximum value of the allocatable communication resources and the current value of the allocation amount of the communication resources or the ratio of the difference to the maximum value is equal to or more than a predetermined value. 20. A transmission data amount control method according to any one of appendices 9 to 12, characterized in that

(Supplementary Note 14)
The transmission data amount control method according to appendix 13, wherein the maximum value is determined based on one or more of a specification of a communication method of the communication and a history of the allocation amount.

(Supplementary Note 15)
The communication quality of the communication, the result of reordering in the lower layer, and as a result of transmission of probe packets, the distribution of delay time and loss rate for each parallel path number are modeled based on any one or more of the above The transmission data amount control method according to appendix 13 or 14, characterized in that a current value is determined.

(Supplementary Note 16)
When increasing the amount of transmission data, the amount of transmission data before the increase is the amount of increase of the allocation amount, the difference between the maximum value of the allocation amount and the difference between the current value and the predetermined value, a reduction of the transmission rate or throughput The transmission data amount control method according to any one of appendices 9 to 15, wherein one of an amount and a product of a predetermined ratio is added.

(Supplementary Note 17)
On the computer
An assignability determination function that determines the possibility that the allocation amount of the communication resource for the communication of the own device is increased according to the increase of the communication load;
Transmission data amount determining function of increasing the amount of transmission data, which is the amount of communication data at the time of transmission in the communication of the own device, when there is the possibility that the allocation amount is increased A computer readable recording medium recording a data amount control program.

(Appendix 18)
The computer-readable transmission data amount control program according to claim 17, wherein the assignability determination function determines the possibility when the communication load of the communication is equal to or more than a predetermined value. recoding media.

(Appendix 19)
The transmission data amount control program according to appendix 17 or 18, wherein the assignability judging function judges that the possibility exists when the delay time increases when the transmission rate is lowered. A computer readable recording medium recorded with

(Supplementary Note 20)
The assignment possibility determination function determines that the possibility exists when a decrease in throughput and an increase in delay time occur and the time variation of the throughput or / and the delay time is small. 20. A computer-readable recording medium recording the transmission data amount control program according to any one of appendices 19 to 19.

(Supplementary Note 21)
The allocatable determination function determines whether the difference between the maximum value of the allocatable communication resources and the current value of the allotment amount of the communication resources or the ratio of the difference to the maximum value is equal to or more than a predetermined value. 20. A computer-readable recording medium storing the transmission data amount control program according to any one of appendixes 17 to 20, which determines that the possibility exists.

(Supplementary Note 22)
The transmission data amount according to appendix 21, wherein the assignment possibility determination function determines the maximum value based on any one or more of a specification of a communication method of the communication and a history of the assignment amount. A computer readable storage medium storing a control program.

(Supplementary Note 23)
The assignability determination function models distribution of delay time and loss rate for each number of parallel paths as a result of transmission of probe packets as a result of communication quality of the communication, reordering in a lower layer, or any of 24. A computer readable recording medium recording the transmission data amount control program according to appendix 21 or appendix 22, wherein the present value is determined based on one or more of them.

(Supplementary Note 24)
When the transmission data amount determination function increases the transmission data amount, the transmission data amount before the increase is multiplied by an increase amount of the allocation amount, and a difference between the maximum value of the allocation amount and the current value by a predetermined ratio. Appendix, a computer-readable storage medium storing the transmission data amount control program according to any one of appendixes 17 to 23, which adds one of the transmission rate and the reduction rate of the transmission rate or the throughput multiplied by a predetermined rate. Possible recording medium.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. The configurations and details of the present invention can be modified in various ways that can be understood by those skilled in the art within the scope of the present invention.

This application claims priority based on Japanese Patent Application No. 2017-245656 filed on Dec. 22, 2017, the entire disclosure of which is incorporated herein.

10, 20 Transmission data amount control device 11 Allocatable possibility determination unit 12 Transmission data amount determination unit 23 Communication quality acquisition unit 24 Congestion degree estimation unit 25 Target congestion degree determination unit 26 Data transmission and reception unit 60 Data reception device 90 Information processing device 91 Communication Interface 92 Input / output interface 93 Arithmetic unit 94 Storage unit 95 Non-volatile storage unit 96 Drive unit 97 Recording medium

Claims

Allocation possibility determination means for determining the possibility that the allocation amount of the communication resource for the communication of the own device is increased according to the increase of the communication load;
Transmission data amount determining means for increasing the amount of transmission data, which is the amount of communication data at the time of transmission in the communication of the own device, when there is the possibility that the allocated amount is increased Quantity control device.
The transmission data amount control device according to claim 1, wherein the assignability determination unit determines the possibility when the communication load of the communication is equal to or more than a predetermined value.
The amount of transmission data according to claim 1 or 2, wherein said assignability determining means determines that there is the possibility when the delay time increases when the transmission rate is lowered. Control device.
The invention is characterized in that the allocatable determination unit determines that the possibility exists when a decrease in throughput and an increase in delay time occur and the time variation of the throughput or / and the delay time is small. The transmission data amount control apparatus according to any one of claims 1 to 3.
The allocatable determination unit determines whether the difference between the maximum value of the allocatable communication resources and the current value of the allotment amount of the communication resources, or the ratio of the difference to the maximum value is a predetermined value or more. The transmission data amount control device according to any one of claims 1 to 4, wherein it is determined that the possibility exists.
The transmission data according to claim 5, wherein the allocatable determination means determines the maximum value based on one or more of a specification of a communication system of the communication and a history of the allotment amount. Quantity control device.
The assignability determination means models distribution of delay time and loss rate for each number of parallel paths as a result of transmission of a probe packet as a result of communication quality of the communication and reordering in a lower layer. The transmission data amount control device according to claim 5 or 6, wherein the current value is determined based on one or more of them.
When increasing the transmission data amount, the transmission data amount determination unit multiplies the transmission data amount before the increase by a predetermined ratio by the difference between the allocation amount and the maximum value of the allocation amount and the current value. The transmission data amount control apparatus according to any one of claims 1 to 7, wherein one of the transmission rate or the reduction amount of the transmission rate or the throughput multiplied by a predetermined rate is added.
Determine the possibility that the allocation amount of communication resources for the communication of the data transmission apparatus may be increased as the communication load increases.
A transmission data amount control method comprising: increasing a transmission data amount which is a communication data amount at the time of transmission in the communication of the data transmission apparatus, when there is the possibility that the allocation amount is increased.
10. The transmission data amount control method according to claim 9, wherein the possibility is determined when the communication load of the communication is equal to or more than a predetermined value.
The transmission data amount control method according to claim 9 or 10, wherein if the delay time increases when the transmission rate is lowered, it is determined that the possibility exists.
It is determined that the possibility exists when a decrease in throughput and an increase in delay time occur and the time variation of the throughput or / and the delay time is small. Transmission data amount control method.
It is determined that the possibility exists when the difference between the maximum value of the allocatable communication resources and the current value of the allocation amount of the communication resources or the ratio of the difference to the maximum value is equal to or more than a predetermined value. The transmission data amount control method according to any one of claims 9 to 12, characterized in that:
The transmission data amount control method according to claim 13, wherein the maximum value is determined based on at least one of a specification of a communication method of the communication and a history of the allocation amount.
The communication quality of the communication, the result of reordering in the lower layer, and as a result of transmission of probe packets, the distribution of delay time and loss rate for each parallel path number are modeled based on any one or more of the above The transmission data amount control method according to claim 13 or 14, wherein the current value is determined.
When increasing the amount of transmission data, the amount of transmission data before the increase is the amount of increase of the allocation amount, the difference between the maximum value of the allocation amount and the difference between the current value and the predetermined value, a reduction of the transmission rate or throughput The transmission data amount control method according to any one of claims 9 to 15, wherein any one of the amount and a predetermined ratio is added.
On the computer
An assignability determination function that determines the possibility that the allocation amount of the communication resource for the communication of the own device is increased according to the increase of the communication load;
Transmission data amount determining function of increasing the amount of transmission data, which is the amount of communication data at the time of transmission in the communication of the own device, when there is the possibility that the allocation amount is increased A computer readable recording medium recording a data amount control program.
The computer-readable transmission data amount control program according to claim 17, wherein the assignability determination function determines the possibility when the communication load of the communication is equal to or more than a predetermined value. Recording media.
The transmission data amount according to claim 17 or 18, wherein the assignability determination function determines that the possibility exists when the delay time increases when the transmission rate is lowered. A computer readable storage medium storing a control program.
The assignability determination function determines that the possibility exists when a decrease in throughput and an increase in delay time occur and the time variation of the throughput or / and the delay time is small. 20. A computer readable recording medium storing the transmission data amount control program according to any one of claims 17 to 19.
The allocatable determination function determines whether the difference between the maximum value of the allocatable communication resources and the current value of the allotment amount of the communication resources or the ratio of the difference to the maximum value is equal to or more than a predetermined value. The computer-readable recording medium which recorded the transmission data amount control program in any one of Claim 17 to 20 which determines that there exists said possibility.
22. The transmission data according to claim 21, wherein the assignability determination function determines the maximum value based on any one or more of a specification of a communication method of the communication and a history of the assignment amount. A computer readable recording medium storing a quantity control program.
The assignability determination function models distribution of delay time and loss rate for each number of parallel paths as a result of transmission of probe packets as a result of communication quality of the communication, reordering in a lower layer, or any of The computer-readable recording medium recording the transmission data amount control program according to claim 21 or 22, wherein the current value is determined based on one or more of them.
When the transmission data amount determination function increases the transmission data amount, the transmission data amount before the increase is multiplied by an increase amount of the allocation amount, and a difference between the maximum value of the allocation amount and the current value by a predetermined ratio. The transmission data amount control program according to any one of claims 17 to 23, wherein one of the transmission rate and the reduction rate of the transmission rate or the throughput multiplied by a predetermined rate is added. Computer readable storage medium.