JP6805713B2 - Receive traffic speedup device, speedup method, and speedup program - Google Patents

Description

The present invention relates to a speed-up device, a speed-up method, and a speed-up program for received traffic, and particularly to control of reply of an acknowledgment packet.

In recent years, with the spread of high-performance and high-performance mobile terminals such as smartphones and tablet terminals, take pictures and short videos with mobile terminals and post them to SNS (Social Networking Service) and IM (Instant Messaging) services. There are an increasing number of usage scenarios in which content is uploaded from a user terminal to a server or storage on a network, such as when using a tablet or saving it in cloud storage.

Here, TCP (Transmission Control Protocol), which is a transport protocol used in many current data communications, transmits data while searching for the line performance (usable band) that can be used by congestion control. There is a disadvantage that it takes time to use up the performance. The specific behavior of TCP congestion control is as follows. In congestion control, the transmission mode is a slow start phase immediately after the start of communication or timeout, and each time an acknowledgment (ACK) packet indicating that a data packet has arrived at the data receiving device normally is received, it can be transmitted. The amount of data (cwnd: congestion window) is increased one packet at a time. In addition, after a slight congestion is detected, the transmission mode is called the congestion avoidance phase.

The method of increasing / decreasing the cwnd in the congestion avoidance phase differs depending on the congestion control. For example, in TCP NewReno of Non-Patent Document 1, every time the same number of ACK packets as the cwnd are received, the cwnd is increased by one packet. As described above, TCP congestion control operates by gradually increasing the amount of data to be transmitted while confirming that the data packet was successfully transmitted by the ACK packet. Therefore, the larger the usable band, or ACK. The larger the round-trip delay required to receive a packet, the longer it takes to use up the network performance.

Various efforts have been made to deal with this inconvenience. Most of these efforts are methods for improving the TCP algorithm of the data transmission device, such as HighSpeed TCP of Non-Patent Document 2. Non-Patent Document 2 shortens the time until the network performance is used up by increasing the rate of increase of cwd in the congestion avoidance phase as compared with Non-Patent Document 1. However, in the case of uploading content or the like, the data transmission device becomes a user terminal, so it is necessary to modify the TCP of the user terminal in order to realize these methods. Since a huge number of user terminals already exist, the above method that requires modification of each TCP is not realistic.

In addition, as another approach, improvement measures such as those in Patent Document 1 have been taken so far. Patent Document 1 increases the frequency of replying ACKs by returning ACKs from the data receiving device at regular intervals regardless of whether or not data packets are received, and the number of times TCP congestion control is performed by the data transmitting device. Is increasing, and the rate of increase of cwnd is accelerated. As a result, it is possible to speed up the traffic uploaded from the user terminal simply by modifying the data receiving device.

Japanese Patent No. 4777996 Japanese Unexamined Patent Publication No. 2004-80070

S. Floyd and T. Henderson, "The NewReno Modification to TCP's Fast Recovery Algorithm," RFC 2582, Apr. 1999. S. Floyd, "HighSpeed TCP for Large Congestion Windows," RFC 3649, Dec. 2003. S. Ha, I. Rhee, and L. Xu, "CUBIC: A New TCP-Friendly High-Speed TCP Variant," In Proc. Of ACM SIGOPS, vol.42, no.5, pp.64-74, New York, NY, USA, Jul. 2008.

However, the above-mentioned background technology has the following problems.

However, in Patent Document 1, since the frequency of returning ACK from the data receiving device is constant, there is a problem that ACK cannot be returned at the optimum frequency, resulting in excess or deficiency. Increasing the frequency of replying ACKs has the advantage that the TCP cwnd of the data transmission device increases quickly and the traffic can be speeded up, but on the other hand, the ACK traffic increases and the data traffic flowing in the same direction increases. There is a demerit of being oppressed. In the case of an ACK packet composed of only headers, the size is about 5% of the data packet, so if the frequency of returning ACK packets is doubled, for example, the throughput of data traffic flowing in the same direction will be about 5 by simple calculation. %descend. In addition, the merits obtained by increasing the frequency of ACK vary depending on the situation. For example, in the case of the slow start phase, immediately after the start of communication, the traffic can be speeded up by the amount of increasing the frequency of ACK, but the TCP cwd of the data transmission device reaches a value at which the available bandwidth can be sufficiently used up. Once reached, there is no benefit to increasing the frequency of ACKs. Further, in the case of the congestion avoidance phase, for example, when the TCP of the data transmission device is the TCP NewReno of Non-Patent Document 1, increasing the frequency of ACK as described above increases the cwnd faster. For example, when the TCP of the data transmission device is the CUBIC TCP of Non-Patent Document 3, the cwnd is calculated based on the elapsed time, so that there is little merit even if the frequency of ACK is increased. Since Patent Document 1 does not consider this merit and demerit, the amount of increase in the frequency of ACK is too small and it takes time to use up the available bandwidth, or the amount of increase in the frequency of ACK is too large and excessive. It causes ACK traffic, which causes inconveniences such as reducing the throughput of data traffic flowing in the same direction.

Patent Document 2 relates to dynamic control of the acknowledgment cycle, and it has been proposed to use the available bandwidth of the network as a criterion when determining the frequency of acknowledgments. However, in Patent Document 2, when the change is drastic, the frequency of transmitting the acknowledgment is set high, and when the change is moderate, the frequency of transmitting the acknowledgment is set low. Therefore, the above-mentioned problem to be solved by the present invention cannot be solved.

[Purpose of Invention]
The present invention accelerates the transport protocol of a data transmitter so that the available bandwidth is used up quickly, and suppresses the reply of unnecessary acknowledgment packets, a speed-up device, a speed-up method, and a speed-up of reception traffic. The purpose is to provide the program.

In order to achieve the above object, the receiving traffic speeding device according to the present invention is a receiving traffic speeding device used in a data receiving device that returns a response packet to a data packet received from a data transmitting device. ,
A target transmission speed estimation means that estimates the available bandwidth of the network based on the reception result of the data packet and estimates the target transmission speed based on the estimated usable bandwidth.
Based on the reception result of the data packet, the current transmission speed estimation means for estimating the current transmission speed at which the data packet is transmitted by the data transmission device, and the current transmission speed estimation means.
A response transmission frequency determining means for determining the transmission frequency of the response packet so that the current transmission speed approaches the target transmission speed based on the estimated target transmission speed and the estimated current transmission speed is included.

The method for speeding up reception traffic according to the present invention is a method for speeding up reception traffic used in a data receiving device that returns a response packet to a data packet received from a data transmitting device.
The available bandwidth of the network is estimated based on the reception result of the data packet, and the target transmission speed is estimated based on the estimated available bandwidth.
Based on the reception result of the data packet, the current transmission speed at which the data packet is transmitted by the data transmission device is estimated.
Based on the estimated target transmission speed and the estimated current transmission speed, the transmission frequency of the response packet is determined so that the current transmission speed approaches the target transmission speed.

The reception traffic acceleration program according to the present invention is a reception traffic acceleration program used in a data receiving device that returns a response packet to a data packet received from a data transmitting device.
On the computer
Target transmission speed estimation processing that estimates the available bandwidth of the network based on the reception result of the data packet and estimates the target transmission speed based on the estimated available bandwidth.
Based on the reception result of the data packet, the current transmission speed estimation process for estimating the current transmission speed for transmitting the data packet by the data transmission device, and the current transmission speed estimation process.
Based on the estimated target transmission speed and the estimated current transmission speed, the response transmission frequency determination process for determining the transmission frequency of the response packet so that the current transmission speed approaches the target transmission speed is executed. ..

According to the present invention, a receive traffic speeding device, a speeding method, and a method for accelerating the transport protocol of a data transmitting device to quickly use up the available bandwidth and suppressing the reply of unnecessary acknowledgment packets. A high-speed program can be provided.

It is a block diagram for demonstrating the high-speed reception traffic apparatus of embodiment of the superordinate concept of this invention. It is a block diagram for demonstrating the high-speed reception traffic apparatus of 1st Embodiment of this invention. It is a flowchart for demonstrating operation of the speed-up apparatus of reception traffic of 1st Embodiment of this invention. It is a block diagram for demonstrating the high-speed reception traffic apparatus of the 2nd Embodiment of this invention. It is a flowchart for demonstrating the operation of the high-speed reception traffic apparatus of the 2nd Embodiment of this invention. (A) is a block diagram for explaining a receiving traffic speeding-up device of another embodiment of the present invention, and (b) is an information processing device used for a receiving traffic speeding up device of another embodiment. It is a block diagram which shows an example.

Before explaining the preferred embodiment of the present invention, the device for speeding up the reception traffic and the method for speeding up the speed of the receiving traffic according to the embodiment of the superordinate concept of the present invention will be described. FIG. 1 is a block diagram for explaining a speed-up device for receiving traffic according to an embodiment of the superordinate concept of the present invention.

The reception traffic speed-up device 200 of FIG. 1 includes a target transmission speed estimation means 201, a current transmission speed estimation means 202, and a response transmission frequency determination means 203.

The target transmission speed estimation means 201 estimates the available bandwidth of the network based on the reception result of the data packet, and estimates the target transmission speed based on the estimated usable bandwidth. The current transmission speed estimation means 202 estimates the current speed of transmitting the data packet based on the reception result of the data packet. The response transmission frequency determining means 203 determines the transmission frequency of the response packet. The transmission frequency of this response packet is determined based on, for example, one or more information of the target transmission speed estimated by the target transmission speed estimation means 12 and the current transmission speed estimated by the current transmission speed estimation means 13. ..

According to the present embodiment, the usable band of the network is estimated based on the reception result of the data packet, and the target transmission speed is estimated based on the estimated usable band. Also, based on the data packet reception result, the current speed of sending the data packet is estimated. Then, the transmission frequency of the response packet is determined based on one or more pieces of information of the estimated target transmission speed and the estimated current transmission speed. In particular, based on the estimated target transmission speed and the estimated current transmission speed, the transmission frequency of the response packet is determined so that the current transmission speed approaches the target transmission speed. This estimates the available bandwidth, determines how fast and how fast the amount of data that can be transmitted by the transport protocol of the data transmitter increases based on the estimation result, and changes the reply frequency of the acknowledgment packet. .. As a result, it is possible to accelerate the use of the available bandwidth quickly and suppress the reply of unnecessary acknowledgment packets. Hereinafter, more specific embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
A speed-up device for receiving traffic and a method for speeding up the reception traffic according to the first embodiment of the present invention will be described. FIG. 2 is a block diagram for explaining a speed-up device for receiving traffic according to the first embodiment of the present invention. FIG. 3 is a flowchart for explaining the operation of the speed-up device for receiving traffic according to the first embodiment of the present invention.

[Description of configuration]
The present embodiment is a case where the speed-up device for receiving traffic and the speed-up method are applied to the data receiving device 1 that receives the data packet transmitted from the data transmitting device 2 via the network 4.

The data receiving device 1 and the data transmitting device 2 of the system of FIG. 2 are, for example, a PC (Personal Computer) or a mobile terminal when the user downloads the content, or a server or cloud storage when the user uploads the content. And so on.

The data receiving device 1 of the system of FIG. 2 receives the data packet transmitted from the data transmitting device 2 and sends a response packet to the data transmitting device 2 depending on whether or not the data packet can be received normally or at regular intervals. It is a data receiving device 1 to transmit to.

The data transmitting device 2 of the system of FIG. 2 may be, for example, a server or cloud storage when the user downloads the content, or a PC or mobile terminal when the user uploads the content, and is a data receiving device. When a data packet is transmitted to 1 and a response packet corresponding to the data packet is received from the data receiving device 1, the response packet corresponding to the data packet is simultaneously received without confirming normal reception according to the information described in the response packet. The data transmitting device 2 determines the amount of data packets that can be transmitted and transmits the data packets to the data receiving device 1 according to the amount of the data packets that can be transmitted.

Further, the system of FIG. 2 includes a network 4 connecting the data receiving device 1 and the data transmitting device 2.

Here, when the protocol used for communication between the data receiving device 1 and the data transmitting device 2 is TCP, the response packet corresponds to an ACK packet, and the amount of the data packet that can be transmitted corresponds to cwnd. To do. However, the present invention is not limited to this, and for example, a program operating in the data receiving device 1 or the data transmitting device 2 may transmit its own response packet or determine the amount of data packet that can be transmitted independently. good.

The data receiving device 1 of the present embodiment includes a data transmission / reception means 11, a target transmission speed estimation means 12, a current transmission speed estimation means 13, a transmission control state estimation means 14, and a response transmission frequency determination means 15. Each of these means operates as follows.

The data transmission / reception means 11 receives the data packet transmitted from the data transmission device 2 via the network 4, and transmits a response packet indicating whether or not the data packet can be normally received, which is determined by the response transmission frequency determination means 15. Is transmitted to the above data transmission device 2.

The target transmission speed estimation means 12 estimates the usable band of the network 4 based on the reception result of the data packet by the data transmission / reception means 11, and estimates the target transmission speed based on the estimated usable band.

The current transmission speed estimation means 13 estimates the current speed at which the data transmission device 2 transmits the data packet based on the reception result of the data packet by the data transmission / reception means 11.

The transmission control state estimation means 14 estimates what kind of determination method is used when determining the amount of data packets that can be transmitted. In the estimation of this determination method, the data transmission device 2 also determines the content and reception status of the response packet based on the reception result of the data packet by the data transmission / reception means 11 and the current transmission speed estimated by the current transmission speed estimation means 13. This is done when determining the amount of data packets that can be sent to and from.

The response transmission frequency determining means 15 determines the transmission frequency of the response packet transmitted by the data transmitting / receiving means 11 to the data transmitting device 2. The transmission frequency is determined by the target transmission speed estimated by the target transmission speed estimation means 12, the current transmission speed estimated by the current transmission speed estimation means 13, and the transmittable data packet estimated by the transmission control state estimation means 14. It is based on one or more of the methods for determining the amount. In particular, based on the estimated target transmission speed and the estimated current transmission speed, the transmission frequency of the response packet is determined so that the current transmission speed approaches the target transmission speed.

The data transmission / reception means 11 receives the data packet when the data packet is transmitted from the data transmission device 2. Further, when the response transmission frequency determining means 15 determines the transmission frequency of the response packet, the response packet indicating whether or not the data packet can be normally received is transmitted to the data transmission device 2 at the determined transmission frequency. To do.

Here, the method of transmitting the response packet at the transmission frequency is, for example, a method of adjusting the number of transmissions of the response packet so as to be in line with the transmission frequency. Specifically, for example, when the response transmission frequency determining means 15 determines that the response packet is transmitted at a frequency 1/5 times the arrival frequency of the data packet, the data transmitting / receiving means 11 receives every five data packets. Send one response packet. Further, for example, when the response transmission frequency determining means 15 determines that the response packet is transmitted at a frequency five times the arrival frequency of the data packet, the data transmitting / receiving means 11 receives five response packets for each data packet received. Send.

Further, the method is not limited to the above-mentioned transmission method, and for example, a method of adjusting the transmission time interval of the response packet so as to meet the above-mentioned transmission frequency may be used. Specifically, for example, when the response transmission frequency determining means 15 determines that the response packet is transmitted at a frequency five times the arrival frequency of the data packet, the data transmitting / receiving means 11 determines the reception time interval of the data packet or its statistical value. The calculation is performed, and the response packet is transmitted at a time interval obtained by multiplying the calculated value by 1/5.

Further, for example, when the response transmission frequency determining means 15 determines that the response packet is transmitted at a frequency 1/5 times the arrival frequency of the data packet, the data transmitting / receiving means 11 responds at a time interval obtained by multiplying the calculated value by 5 times. Send a packet. Here, when the protocol used for communication between the data receiving device 1 and the data transmitting device 2 is TCP, duplicate ACKs are used when transmitting two or more response packets for one data packet. In order to prevent the data packet from becoming, the next sequence number is described in the response packet and transmitted as if the sequence number in the middle of the data packet has been received.

Specifically, for example, when one data packet having a sequence number of 10001 to 11400 is received and five response packets are transmitted to the data packet, the data transmission / reception means 11 has, for example, a request sequence number. The response packets described as 10281, 10561, 10841, 11121, and 11401 are transmitted to the data transmission device 2. Further, the sequence number described in the response packet may be sequentially described with a value larger than 1 and the smallest sequence number among unreceived sequences may be described in the last response packet. As a result, there is no restriction to increase the sequence number evenly as in the above example. For example, the response packets in which the requested sequence numbers are 10002, 10003, 10004, and 11401 are sent to the data transmission device 2. You may send it.

The target transmission speed estimation means 12 estimates the usable band of the network 4 based on the reception result of the data packet by the data transmission / reception means 11 when the data transmission / reception means 11 receives the data packet or at regular intervals. The target transmission speed is estimated based on the above usable band. Here, the method of estimating the usable band is, for example, a method of estimating the size of the data packet or its statistical value divided by the reception interval of the data packet in the data transmitting / receiving means 11 or the statistical value thereof as the usable band. ..

Further, not limited to the above estimation method, for example, a data packet whose reception interval in the data transmission / reception means 11 is equal to or less than a predetermined threshold is regarded as one packet group, and the size of the packet group or its statistical value is set as the packet group. A method of estimating the usable band by dividing the time required for receiving the data or its statistical value may be used.

Further, the method of estimating the target transmission speed here is, for example, a method of estimating the estimated usable band as it is as the target transmission speed. Further, the method is not limited to the above estimation method, and for example, the round-trip delay time between the data transmitting device 2 and the data receiving device 1 is calculated using a time stamp value or the like, and the round-trip delay time or its statistical value is estimated. A method of estimating the target transmission speed by multiplying the value obtained by multiplying the available bandwidth may be used.

At present, the transmission speed estimation means 13 is currently used by the data transmission device 2 based on the data packet reception result by the data transmission / reception means 11 when the data transmission / reception means 11 receives the data packet or at regular time intervals. Estimate the current transmission speed at which packets are sent. Here, in the method of estimating the current transmission speed, for example, the round-trip delay time between the data transmission device 2 and the data reception device 1 is calculated using a time stamp value or the like, and data is obtained during the round-trip delay time. This is a method of estimating the size of the data packet received by the transmission / reception means 11 or its statistical value as the current transmission speed.

Further, the present invention is not limited to the above estimation method, and for example, the size of the data packet received by the data transmission / reception means 11 during the round trip delay time or its statistical value is divided by the round trip delay time or its statistical value. It may be a method of estimating the transmission speed.

The transmission control state estimation means 14 receives data by the data transmission / reception means 11 when the data transmission / reception means 11 receives a data packet, or when the current transmission speed estimation means 13 estimates the current transmission speed, or at regular time intervals. When the data transmission device 2 determines the amount of data packets that can be transmitted based on the content of the response packet and the reception status based on the packet reception result and the current transmission speed estimated by the current transmission speed estimation means 13. In addition, the transmission control state of what kind of determination method is used is estimated.

Here, in the method of estimating the transmission control state, for example, when the protocol used for communication between the data receiving device 1 and the data transmitting device 2 is TCP, is the TCP of the data transmitting device 2 in the slow start phase? This is a method of estimating whether or not the vehicle is in the congestion avoidance phase. Specifically, when the data transmission / reception means 11 transmits the response packets having the same requested sequence number three times in a row, or the current transmission speed estimated by the current transmission speed estimation means 13 is set to the previous value in advance. Congestion avoidance when it is smaller than the value obtained by multiplying the predetermined constant α, or when the current transmission speed estimated by the current transmission speed estimation means 13 is smaller than the value obtained by adding the predetermined constant β to the previous value. It is presumed that the phase has shifted, and it is presumed that the slow start phase has been entered immediately after the start of communication or when the current transmission speed estimated by the current transmission speed estimation means 13 is smaller than a predetermined threshold.

Further, not limited to the above estimation method, for example, even if the protocol used for communication between the data receiving device 1 and the data transmitting device 2 is other than TCP, the determination algorithm is known or notified in advance. A method of estimating the transmission control state may be used in the same manner by setting the discrimination conditions according to the behavior of the deterministic algorithm.

The response transmission frequency determining means 15 determines the current transmission speed when the data transmission / reception means 11 receives the data packet, the target transmission speed estimation means 12 estimates the target transmission speed, or the current transmission speed estimation means 13 determines the current transmission speed. When estimated, when the transmission control state estimating means 14 estimates the transmission control state, or at regular intervals, the target transmission speed estimated by the target transmission speed estimating means 12 and the current transmission speed estimating means 13 estimate. The data transmission / reception means 11 transmits the data to the data transmission device 2 based on the current transmission speed and one or more of the methods for determining the amount of data packets that can be transmitted estimated by the transmission control state estimation means 14. Determines how often response packets are sent.

Here, the transmission frequency represents a magnification value greater than 0, which is how many response packets are transmitted for one data packet. As a specific process, the response transmission frequency determination means 15 determines whether to use one of two different transmission frequency determination methods, a high frequency determination method and a low frequency determination method, and further determines the determination transmission frequency. The frequency of sending response packets is determined using the determination method of. Here, as a method of determining whether to use either the high frequency determination method or the low frequency determination method, for example, the current transmission speed estimated by the current transmission speed estimation means 13 is the target transmission estimated by the target transmission speed estimation means 12. This method determines that the high frequency determination method is used when the speed is smaller than the value obtained by multiplying the velocity by a predetermined constant γ, and determines that the low frequency determination method is used in other cases.

Further, not limited to the above determination method, when the transmission control state estimation means 14 estimates that the TCP of the data transmission device 2 is in the slow start phase, for example, it determines that the high frequency determination method is used, and the data transmission device 2 When it is estimated that TCP in the above is in the congestion avoidance phase, it may be a method of determining that the low frequency determination method is used.

Further, as a method of determining the transmission frequency of the response packet, there is a method of determining that the transmission frequency determined by the high frequency determination method is higher than the transmission frequency determined by the low frequency determination method. As a specific determination method, the transmission frequency determination method in the high frequency determination method is, for example, that the larger the target transmission speed estimated by the target transmission speed estimation means 12, the higher the transmission frequency, or the current transmission speed estimation. This is a method of determining the transmission frequency by using a function in which the transmission frequency decreases as the current transmission speed estimated by the means 13 increases.

More specifically, when the target transmission speed is A, the current transmission speed is B, and the predetermined constants are δ (positive real number) and ε (real number), the transmission frequency is (A / B). It is a method determined by ^ (1 / δ) -ε. Further, the method is not limited to the above determination method, and for example, the transmission frequency may be determined by (A / B) × (1 / δ) −ε, and for example, any of the above determination methods may be used. A method may be used in which the calculation is performed only once immediately after the shift to the frequency determination method or immediately after the start of communication, and the same transmission frequency is continuously used until the shift to the low frequency determination method.

For example, when the low frequency determination method determines the transmission frequency lower than that of the TCP of the background technique, the method may determine the transmission frequency to be the same as that of the TCP of the background technique. Here, δ indicates how quickly the target transmission speed is reached. For example, when the target transmission speed is reached in about 5 times the round-trip delay time, it is desirable to set δ = 5. Further, ε is a numerical value for adjusting the transmission frequency, and it is desirable that ε = 1 or ε = 1 / δ. However, the present invention is not limited to the above numerical example, and another numerical value may be set.

The transmission frequency determination method in the low frequency determination method is, for example, a method of determining the transmission frequency by using a function in which the transmission frequency decreases as the current transmission speed increases. More specifically, when a predetermined constant is ζ (positive real number) and η (real number), the transmission frequency is determined by ζ / B−η. Further, the method is not limited to the above determination method, and is, for example, a method of determining the transmission frequency to a predetermined constant θ. Further, the method is not limited to the above determination method. For example, when the high frequency determination method determines the transmission frequency higher than that of the TCP of the background technology, the transmission frequency may be the same as that of the TCP of the background technology. .. Here, ζ indicates how many response packets are to be transmitted. For example, when about 10 response packets are transmitted within the round-trip delay time, it is desirable to set ζ = 10. Further, η is a numerical value for adjusting the transmission frequency, and it is desirable that η = 0. However, the present invention is not limited to the above numerical example, and another numerical value may be set.

In the response transmission frequency determining means 15, the target transmission speed estimated by the target transmission speed estimating means 12, the current transmission speed estimated by the current transmission speed estimating means 13, and the transmission possible estimated by the transmission control state estimating means 14. Use one or more of the methods for determining the amount of data packets. However, when some of the above information is not used, the response transmission frequency determining means 15 may have a configuration that does not include the estimation means corresponding to the above information that is not used in the first embodiment.

[Explanation of operation]
Next, the operation of the first embodiment of the present invention will be described with reference to FIGS. 2 and 3.

First, the data transmission / reception means 11 receives the data packet when the data packet is transmitted from the data transmission device 2 via the network 4 (step S11).

The target transmission speed estimation means 12 estimates the usable band of the network 4 based on the reception result of the data packet by the data transmission / reception means 11 when the data transmission / reception means 11 receives the data packet or at regular intervals. Further, the target transmission speed estimation means 12 estimates the target transmission speed based on the usable band thus estimated (step S12).

At present, the data transmission device 2 is currently performing data on the transmission speed estimation means 13 based on the data packet reception result by the data transmission / reception means 11 when the data transmission / reception means 11 receives the data packet or at regular intervals. The current transmission speed at which the packet is transmitted is estimated (step S13).

Data by the data transmission / reception means 11 when the transmission control state estimation means 14 receives a data packet by the data transmission / reception means 11, or when the current transmission speed estimation means 13 estimates the current transmission speed, or at regular time intervals. When the data transmission device 2 determines the amount of data packets that can be transmitted based on the content of the response packet and the reception status based on the packet reception result and the current transmission speed estimated by the current transmission speed estimation means 13. In addition, the transmission control state of what kind of determination method is used is estimated (step S14).

Next, the response transmission frequency determining means 15 determines the transmission frequency of the response packet transmitted by the data transmitting / receiving means 11 to the data transmitting device 2 (step S15). The transmission frequency of this response packet includes the target transmission speed estimated by the target transmission speed estimation means 12, the current transmission speed estimated by the current transmission speed estimation means 13, and the transmittable data packet estimated by the transmission control state estimation means 14. It is determined based on the information of one or more of the methods for determining the amount of. In particular, based on the estimated target transmission speed and the estimated current transmission speed, the transmission frequency of the response packet is determined so that the current transmission speed approaches the target transmission speed. Further, the transmission frequency of the response packet is determined when the data transmission / reception means 11 receives the data packet, the target transmission speed estimation means 12 estimates the target transmission speed, or the current transmission speed estimation means 13 currently determines the transmission frequency. This is performed when the transmission speed is estimated, or when the transmission control state estimation means 14 estimates the transmission control state, or at regular time intervals.

Next, when the data transmission / reception means 11 receives the data packet or at regular intervals, the response transmission frequency determining means 15 determines the transmission frequency of the response packet indicating whether or not the data packet can be normally received. Is transmitted to the data transmission device 2 (step S16).

[Explanation of effect]
According to the present embodiment, the data transmission / reception means 11 is based on one or more information of the estimated target transmission speed, the estimated current transmission speed, and the estimated transmission amount of data packets. The response transmission frequency determining means 15 determines the transmission frequency of the response packet transmitted by the data transmission device 2.

As a result, the available bandwidth is estimated, and based on the estimation result, it is determined how much and how quickly the amount of data that can be transmitted by the transport protocol of the data transmission device 2 increases, and the reply frequency of the acknowledgment packet is changed. To do. As a result, it is possible to accelerate the use of the available bandwidth quickly and suppress the reply of unnecessary acknowledgment packets.

In particular, the transmission frequency of the response packet transmitted by the data transmission / reception means 11 to the data transmission device 2 is set so that the current transmission speed approaches the target transmission speed based on the estimated target transmission speed and the estimated current transmission speed. By determining the transmission frequency of the response packet, the transmission frequency of the response packet can be optimized, and the reception traffic can be further speeded up.

[Second Embodiment]
Next, a device for speeding up reception traffic and a method for speeding up the reception traffic according to the second embodiment of the present invention will be described. FIG. 4 is a block diagram for explaining the speed-up device for receiving traffic according to the second embodiment of the present invention. FIG. 5 is a flowchart for explaining the operation of the speed-up device for receiving traffic according to the second embodiment of the present invention. The elements similar to those of the reception traffic speed-up device of the first embodiment are designated by the same reference numbers, and detailed description thereof will be omitted.

[Description of configuration]
The present embodiment is a case where the first embodiment is applied to a system including a relay server 3 that once terminates data communication between the data transmitting device 2 and the data receiving device 1. In other words, the present embodiment is a case where the above-described reception traffic speed-up device and speed-up method are applied to the relay server 3 that once terminates the data communication between the data transmission device 2 and the data reception device 1. ..

With reference to FIG. 4, a second embodiment of the present invention has a data transmission device 2 and a data reception device 1 as opposed to the first embodiment, such as a cache server, a proxy server, and a MEC (Mobile Edge Computing) server. Includes a relay server 3 that is installed between and terminates data communication between the data transmitting device 2 and the data receiving device 1 once. In the present embodiment, in the network 4 of the first embodiment, the section between the data transmission device 2 and the relay server 3 is the transmission side network 41, and the section between the relay server 3 and the data reception device 1 is the reception side network. Let it be 42.

Each of these means operates as follows.

The data receiving device 1 may have the same configuration as the data receiving device 1 of the first embodiment, or may have the same configuration as the data receiving device of the background technology without having a special configuration.

The relay server 3 is a data transmission / reception means (reception side) that transmits a data packet received from the data transmission device 2 to the data reception device 1 via the reception side network 42 to the data reception device 1 of the first embodiment. 112 is further included. Further, the relay server 3 includes a data transmission / reception means (transmission side) 111 instead of the data transmission / reception means 11 of the first embodiment.

In addition to the operation of the data transmission / reception means 11 of the first embodiment, the data transmission / reception means (transmission side) 111 transmits the data packet to the data transmission / reception means (reception side) 112 when the data packet is received from the data transmission device 2. Transfer to.

When the data packet is transferred from the data transmission / reception means (transmission side) 111, the data transmission / reception means (reception side) 112 transmits the data packet to the data reception device 1 via the reception side network 42. Then, when the response packet corresponding to the data packet is received from the data receiving device 1, the data packet that can be simultaneously transmitted without confirming normal reception according to the information described in the response packet. The amount is determined, and the data packet is transmitted to the data receiving device 1 according to the amount of the data packet that can be transmitted.

In addition to the operation of the target transmission speed estimation means 12 of the first embodiment, the target transmission speed estimation means 12 transmits / receives data when the data transmission / reception means (reception side) 112 receives a response packet or at regular time intervals. The usable band of the receiving side network 42 is estimated based on the reception result of the response packet by the means (receiving side) 112, and the usable side network 41 is estimated in the same manner as the target transmission speed estimating means 12 of the first embodiment. The target transmission speed is estimated based on the band and the available band on the receiving side. Here, the method of estimating the usable band on the receiving side is, for example, the size of data newly confirmed to have normally arrived at the data receiving device 1 by the response packet received by the data transmitting / receiving means (receiving side) 112, or the size thereof. This is a method of estimating the available bandwidth of the receiving side by dividing the statistical value by the receiving interval of the response packet data transmission / reception means (reception side) 112 or the statistical value thereof. Further, not limited to the above estimation method, for example, a response packet whose reception interval in the data transmission / reception means (reception side) 112 is equal to or less than a predetermined threshold is regarded as a group of response packets, and the data reception device is based on the response packet group. A method of estimating the usable band on the receiving side by dividing the size of the data newly confirmed to have normally arrived at 1 or its statistical value by the time taken to receive the response packet group or the statistical value. The data packet size in the relay server 3, that is, the data packet that has been received by the data transmitting / receiving means (transmitting side) 111 and has not yet been transmitted by the data transmitting / receiving means (receiving side) 112. The transmission side network 41 that measures the size and estimates the increase rate of the retained data size (when it decreases, it is regarded as the increase rate of the negative value) in the same manner as the target transmission speed estimation means 12 of the first embodiment. A method of estimating the value subtracted from the usable band of the above as the usable band of the receiving side may be used, or the data packet received by the data transmitting / receiving means (transmitting side) 111 is temporarily retained in the relay server 3. Even in a method in which the accumulated data packets are collectively transmitted from the data transmitting / receiving means (reception side) 112, and the throughput obtained by transmitting the retained data packets is estimated as the usable band on the receiving side. It is good, and assuming that the usable band on the receiving side does not change suddenly, the maximum usable band or throughput obtained in the previous communication session between the relay server 3 and the data receiving device 1 is defined as the usable band on the receiving side. It may be an estimation method. Further, here, in the method of estimating the target transmission speed, for example, the value of either the usable band of the transmitting side network 41 or the usable band of the receiving side network 42, or the smaller value is estimated as the target transmission speed. How to do it. Further, the method is not limited to the above estimation method, and for example, the round-trip delay time between the data transmission device 2 and the relay server 3 (round-trip delay time of the transmitting network 41) and the relay server 3 using a time stamp value or the like are used. The round-trip delay time to and from the data receiving device 1 (round-trip delay time of the receiving network 42) was calculated, and the round-trip delay time of the transmitting network 41 or its statistical value was multiplied by the available band of the transmitting network 41. A method of estimating the target transmission speed by either the value and the round-trip delay time of the receiving network 42 or the statistical value thereof multiplied by the available band of the receiving network 42, or the smaller value. There may be.

[Explanation of operation]
Next, the operation of the second embodiment of the present invention will be described with reference to FIGS. 4 and 5.

First, when the data transmission / reception means (transmission side) 111 of the relay server 3 receives the data packet from the data transmission device 2 via the transmission side network 41, the data packet is received and the data packet is data. Transfer to the transmission / reception means (reception side) 112 (step S21).

When the data transmission / reception means (reception side) 112 of the relay server 3 transfers a data packet from the data transmission / reception means (transmission side) 111, the data packet is transmitted to the data reception device 1 via the reception side network 42. (Step S22).

The target transmission speed estimation means 12 transmits the data packet when the data transmission / reception means (transmission side) 111 receives the data packet, or at regular intervals based on the reception result of the data packet by the data transmission / reception means (transmission side) 111. Estimate the available bandwidth of the side network 41. Further, the target transmission speed estimation means 12 is based on the reception result of the response packet by the data transmission / reception means (reception side) 112 when the data transmission / reception means (reception side) 112 receives the response packet or at regular intervals. Estimate the available bandwidth of the receiving network 42. The target transmission speed estimation means 12 estimates the target transmission speed based on the usable band on the transmitting side and the estimated usable band on the receiving side (step S23).

Currently, the transmission speed estimation means 13 receives a data packet by the data transmission / reception means (transmission side) 111, or at regular intervals, based on the reception result of the data packet by the data transmission / reception means (transmission side) 111. The current transmission speed is estimated (step S24). This current transmission speed is the transmission speed at which the data transmission device 2 transmits a data packet at this time.

A transmission control state in which the transmission control state estimation means 14 uses a determination method when the data transmission device 2 determines the amount of data packets that can be transmitted based on the content of the response packet and the reception status. Is estimated (step S25). The amount of data packets that can be transmitted is determined when the data transmission / reception means (transmitting side) 111 receives the data packet, or when the current transmission speed estimation means 13 estimates the current transmission speed, or at regular time intervals. To do.

Next, the response transmission frequency determining means 15 can transmit the target transmission speed estimated by the target transmission speed estimation means 12, the current transmission speed estimated by the current transmission speed estimation means 13, and the transmission control state estimation means 14 estimated. Based on one or more pieces of information in the method for determining the amount of data packets, the data transmission / reception means (transmitting side) 111 determines the transmission frequency of the response packet to be transmitted to the data transmission device 2 (step S26). In particular, based on the estimated target transmission speed and the estimated current transmission speed, the transmission frequency of the response packet is determined so that the current transmission speed approaches the target transmission speed. The transmission frequency is determined when the data transmission / reception means (transmitting side) 111 receives the data packet, the target transmission speed estimation means 12 estimates the target transmission speed, or the current transmission speed estimation means 13 currently determines the transmission frequency. This is performed when the transmission speed is estimated, or when the transmission control state estimation means 14 estimates the transmission control state, or at regular time intervals.

Next, when the data transmitting / receiving means (transmitting side) 111 receives the data packet, or at regular intervals, the response transmitting frequency determining means 15 sends a response packet indicating whether or not the data packet can be normally received. The data is transmitted to the data transmission device 2 at a determined transmission frequency (step S27).

[Explanation of effect]
According to the present embodiment, data transmission / reception means (based on one or more information of an estimated target transmission speed, an estimated current transmission speed, and an estimated method for determining the amount of transmittable data packets). The response transmission frequency determining means 15 determines the transmission frequency of the response packet transmitted by the transmitting side) 111 to the data transmission device 2.

As a result, the available bandwidth is estimated, and based on the estimation result, it is determined how much and how quickly the amount of data that can be transmitted by the transport protocol of the data transmission device 2 increases, and the reply frequency of the acknowledgment packet is changed. To do. As a result, it is possible to accelerate the use of the available bandwidth quickly and suppress the reply of unnecessary acknowledgment packets.

In particular, the current transmission speed is the target transmission based on the estimated target transmission speed and the estimated current transmission speed of the transmission frequency of the response packet transmitted by the data transmission / reception means (transmission side) 111 to the data transmission device 2. By determining the transmission frequency of the response packet so as to approach the speed, the transmission frequency of the response packet can be optimized, and the reception traffic can be further increased.

Further, in the present embodiment, the target transmission speed estimation means 12 of the relay server 3 estimates the target transmission speed based on the reception result of the data packet and the reception result of the response packet. As a result, even in a system including a relay server 3 that terminates data communication between the data transmitting device 2 and the data receiving device 1 once, the available bandwidth is accelerated so as to be used up quickly, and unnecessary acknowledgment packets are returned. Can be suppressed.

[Other Embodiments]
The speed-up device for receiving traffic according to each embodiment of the present invention described above can also be realized by an information processing device capable of executing a program that realizes such a configuration or operation. For example, the reception traffic speed-up device of the present invention may be realized by having the information processing device read and execute a program for executing the speed-up method described above. This program may be distributed in the form of computer-readable recording media. By reading the program recorded on such a recording medium and executing it in the information processing apparatus, the function of the present embodiment may be realized by software.

FIG. 6A is a block diagram for explaining a receiving traffic speeding device according to another embodiment of the present invention, and FIG. 6B is used for a receiving traffic speeding device according to another embodiment. It is a block diagram which shows an example of the information processing apparatus. The information processing device 300 of FIG. 6B includes a CPU (Central Processing Unit) 301 and a memory 302. With the information processing device 300 having such a hardware configuration, the device for increasing the speed of reception traffic according to the above-described embodiment of the present invention can be realized. That is, the CPU 301 can execute the target transmission speed estimation process, the current transmission speed estimation process, the response transmission frequency determination process, and the like, estimate the available bandwidth, and transmit the transport protocol of the data transmission device based on the estimation result. It may be configured to change the reply frequency of the acknowledgment packet by determining how much and how quickly the amount of data increases. A program that executes such processing can be distributed in the form of a recording medium on which the program is recorded. This program is a general-purpose semiconductor recording device such as CF (Compact Flash (registered trademark)) and SD (Secure Digital), a magnetic recording medium such as a flexible disk, or a CD-ROM (Compact Disc Read Only Memory). ), Etc., can be distributed in the form of an optical recording medium or the like.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited thereto. It goes without saying that various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention.

Some or all of the above embodiments may also be described, but not limited to:
(Appendix 1) A device for speeding up reception traffic used in a data receiving device that returns a response packet to a data packet received from a data transmitting device.
A target transmission speed estimation means that estimates the available bandwidth of the network based on the reception result of the data packet and estimates the target transmission speed based on the estimated usable bandwidth.
Based on the reception result of the data packet, the current transmission speed estimation means for estimating the current transmission speed of transmitting the data packet by the data transmission device, and
Receiving including a response transmission frequency determining means for determining the transmission frequency of the response packet so that the current transmission speed approaches the target transmission speed based on the estimated target transmission speed and the estimated current transmission speed. A high-speed device for traffic.
(Appendix 2) The response transmission frequency determining means determines which of the first transmission frequency determination method and the second transmission frequency determination method is used to determine the transmission frequency of the response packet according to the conditions. ,
The transmission frequency of the response packet determined by the first transmission frequency determination method is set to be higher than the transmission frequency of the response packet determined by the second transmission frequency determination method. The described receive traffic acceleration device.
(Appendix 3) When the response transmission frequency determination means uses the first transmission frequency determination method, the higher the target transmission speed, the higher the transmission frequency of the response packet, or the higher the current transmission speed, the higher the response packet. The high-speed reception traffic device according to Appendix 2, wherein the transmission frequency of the response packet is determined by using a function that reduces the transmission frequency of.
(Appendix 4) When the response transmission frequency determination means uses the first transmission frequency determination method, the value obtained by dividing the target transmission speed by the current transmission speed is multiplied by the first constant power or the first constant. Then, the reception traffic speeding-up device according to Appendix 2 or Appendix 3, wherein the transmission frequency of the response packet is determined by using the value obtained by subtracting the second constant.
(Appendix 5) When the second transmission frequency determination method is used, the response transmission frequency determination means uses a function in which the transmission frequency of the response packet decreases as the current transmission speed increases, and the transmission frequency of the response packet increases. The speed-up device for receiving traffic according to any one of Supplementary note 2 to Supplementary note 4, which determines.
(Appendix 6) The response transmission frequency determination means determines that the first transmission frequency determination method is used when the current transmission speed is smaller than the value obtained by multiplying the target transmission speed by the third constant. The speed-up device for receiving traffic according to any one of Supplementary note 2 to Supplementary note 5, wherein it is determined that the second transmission frequency determination method is used in cases other than the above.
(Appendix 7) When the protocol used for communication between the data transmitting device and the data receiving device is TCP (Transmission Control Protocol).
Further equipped with a transmission control state estimation means for estimating whether the congestion control state in the data transmission device is slow start or congestion avoidance based on the reception status of the data packet and the current transmission speed.
When the transmission control state estimating means estimates that the congestion control state is slow start, the response transmission frequency determining means determines that the first transmission frequency determining method is used, and determines that congestion avoidance is achieved. The speed-up device for receiving traffic according to any one of Supplementary note 2 to Supplementary note 5, which determines that the second transmission frequency determination method is used when it is estimated.
(Appendix 8) It is applied to a relay server installed between the data transmitting device and the data receiving device.
The target transmission speed estimation means estimates the first usable band in the network between the data transmission device and the relay server based on the reception status of the data packet from the data transmission device, and receives the data. The second usable band in the network between the relay server and the data receiving device is estimated based on the reception status of the response packet from the device or the rate of change in the amount of data accumulated in the relay server. The device for increasing the speed of reception traffic according to any one of Supplementary note 1 to Supplementary note 7, wherein the target transmission speed is estimated based on the first usable band and the second usable band.
(Appendix 9) A method for increasing the speed of reception traffic used in a data receiving device that returns a response packet to a data packet received from the data transmitting device.
The available bandwidth of the network is estimated based on the reception result of the data packet, and the target transmission speed is estimated based on the estimated available bandwidth.
Based on the reception result of the data packet, the current transmission speed at which the data packet is transmitted by the data transmission device is estimated.
A method for increasing the speed of reception traffic, in which the transmission frequency of a response packet is determined so that the current transmission speed approaches the target transmission speed based on the estimated target transmission speed and the estimated current transmission speed.
(Appendix 10) In determining the transmission frequency of the response packet, which of the first transmission frequency determination method and the second transmission frequency determination method is used to determine the transmission frequency of the response packet according to the conditions. Judge,
The transmission frequency of the response packet determined by the first transmission frequency determination method is set to be higher than the transmission frequency of the response packet determined by the second transmission frequency determination method. The method for speeding up the received traffic described.
(Appendix 11) When the first transmission frequency determination method is used, a function is provided in which the higher the target transmission speed, the higher the transmission frequency of the response packet, or the higher the current transmission speed, the lower the transmission frequency of the response packet. The method for increasing the speed of reception traffic according to Appendix 10, wherein the response packet transmission frequency is determined by using the method.
(Appendix 12) When the first transmission frequency determination method is used, the value obtained by dividing the target transmission speed by the current transmission speed is multiplied by the first constant power or the first constant, and then the second constant is obtained. The method for increasing the speed of reception traffic according to Appendix 10 or Appendix 11, wherein the frequency of transmission of the response packet is determined using the subtracted value.
(Appendix 13) When the second transmission frequency determination method is used, the transmission frequency of the response packet is determined by using a function in which the transmission frequency of the response packet decreases as the current transmission speed increases. The method for speeding up reception traffic according to any one of 12.
(Appendix 14) When the current transmission speed is smaller than the value obtained by multiplying the target transmission speed by the third constant, it is determined that the first transmission frequency determination method is used, and in other cases, the second transmission speed is used. The method for increasing the speed of reception traffic according to any one of Supplementary note 10 to Supplementary note 13, which is determined to use the transmission frequency determination method.
(Appendix 15) When the protocol used for communication between the data transmitting device and the data receiving device is TCP (Transmission Control Protocol).
Based on the data packet reception status and the current transmission speed, it is estimated whether the congestion control status in the data transmission device is slow start or congestion avoidance.
When it is estimated that the congestion control state is slow start, it is determined that the first transmission frequency determination method is used, and when it is estimated that congestion avoidance is used, the second transmission frequency determination method is used. The method for speeding up reception traffic according to any one of Supplementary note 10 to Supplementary note 13, which is determined to be used.
(Appendix 16) It is applied to a relay server installed between the data transmitting device and the data receiving device.
Based on the reception status of the data packet from the data transmission device, the first usable band in the network between the data transmission device and the relay server is estimated, and the reception status of the response packet from the data reception device. Alternatively, the second usable band in the network between the relay server and the data receiving device is estimated based on the rate of change in the amount of data stored in the relay server, and the first usable band is used. The method for increasing the speed of reception traffic according to any one of Supplementary note 9 to Supplementary note 15, wherein the target transmission speed is estimated based on the second usable band.
(Appendix 17) A program for speeding up reception traffic used in a data receiving device that returns a response packet to a data packet received from the data transmitting device.
On the computer
Target transmission speed estimation processing that estimates the available bandwidth of the network based on the reception result of the data packet and estimates the target transmission speed based on the estimated available bandwidth.
Based on the reception result of the data packet, the current transmission speed estimation process for estimating the current transmission speed of transmitting the data packet by the data transmission device, and the current transmission speed estimation process.
Based on the estimated target transmission speed and the estimated current transmission speed, a response transmission frequency determination process for determining the transmission frequency of the response packet so that the current transmission speed approaches the target transmission speed is executed. Incoming traffic acceleration program.
(Appendix 18) In the response transmission frequency determination process, it is determined which of the first transmission frequency determination method and the second transmission frequency determination method is used to determine the transmission frequency of the response packet according to the conditions. ,
The transmission frequency of the response packet determined by the first transmission frequency determination method is set to be higher than the transmission frequency of the response packet determined by the second transmission frequency determination method. The described receive traffic acceleration program.
(Appendix 19) In the response transmission frequency determination process, when the first transmission frequency determination method is used, the higher the target transmission speed, the higher the transmission frequency of the response packet, or the higher the current transmission speed, the higher the response packet. The high-speed reception traffic program according to Appendix 18, which determines the transmission frequency of the response packet by using a function that reduces the transmission frequency of.
(Appendix 20) In the response transmission frequency determination process, when the first transmission frequency determination method is used, the value obtained by dividing the target transmission speed by the current transmission speed is multiplied by the first constant power or the first constant. The reception traffic acceleration program according to Appendix 18 or Appendix 19, wherein the frequency of transmission of the response packet is determined by using a value obtained by subtracting the second constant.
(Appendix 21) In the response transmission frequency determination process, when the second transmission frequency determination method is used, the transmission frequency of the response packet is transmitted by using a function in which the transmission frequency of the response packet decreases as the current transmission speed increases. The high-speed receiving traffic program according to any one of Supplementary note 18 to Supplementary note 20, which determines.
(Appendix 22) In the response transmission frequency determination process, when the current transmission speed is smaller than the value obtained by multiplying the target transmission speed by the third constant, it is determined that the first transmission frequency determination method is used. The high-speed reception traffic program according to any one of Supplementary note 18 to Supplementary note 21, wherein it is determined that the second transmission frequency determination method is used in cases other than the above.
(Appendix 23) When the protocol used for communication between the data transmitting device and the data receiving device is TCP (Transmission Control Protocol).
Further, the computer is made to execute a transmission control state estimation process for estimating whether the congestion control state in the data transmission device is slow start or congestion avoidance based on the reception status of the data packet and the current transmission speed. ,
In the response transmission frequency determination process, when the congestion control state is estimated to be a slow start by the transmission control state estimation process, it is determined that the first transmission frequency determination method is used, and congestion avoidance is determined. The high-speed receiving traffic program according to any one of Supplementary note 18 to Supplementary note 21, which determines that the second transmission frequency determination method is used when it is estimated.
(Appendix 24) It is applied to a relay server installed between the data transmitting device and the data receiving device.
In the target transmission speed estimation process, the first usable band in the network between the data transmission device and the relay server is estimated based on the reception status of the data packet from the data transmission device, and the data reception is performed. The second usable band in the network between the relay server and the data receiving device is estimated based on the reception status of the response packet from the device or the rate of change in the amount of data stored in the relay server. The reception traffic acceleration program according to any one of Supplementary note 17 to Supplementary note 23, which estimates the target transmission speed based on the first usable band and the second usable band.

The present invention can be applied to a data receiving device such as a user terminal at the time of data download and a server at the time of data upload. In addition, it can be applied to a relay server device that is installed in the middle of a data transmission / reception route and transfers packets communicated between data transmission / reception devices.

1 Data receiving device 11 Data transmitting / receiving means 111 Data transmitting / receiving means (transmitting side)
112 Data transmission / reception means (reception side)
12, 201 Target transmission speed estimation means 13, 202 Current transmission speed estimation means 14 Transmission control state estimation means 15, 203 Response transmission frequency determination means 2 Data transmission device 3 Relay server 4 Network 41 Transmission side network 42 Reception side network 200 Reception traffic Speed-up device 300 Information processing device 301 CPU
302 memory

Claims (9)

It is a high-speed receiving traffic device used in a data receiving device that returns a response packet to a data packet received from a data transmitting device.
A target transmission speed estimation means that estimates the available bandwidth of the network based on the reception result of the data packet and estimates the target transmission speed based on the estimated usable bandwidth.
Based on the reception result of the data packet, the current transmission speed estimation means for estimating the current transmission speed of transmitting the data packet by the data transmission device, and
Based on the current transmission rate and the estimated target transmission rate to the estimated, seen including and a response transmission frequency determining means for the current transmission rate to determine the transmission frequency of the response packet to approach to the target transmission rate ,
The response transmission frequency determination means determines which of the first transmission frequency determination method and the second transmission frequency determination method is used to determine the transmission frequency of the response packet according to the conditions.
The transmission frequency of the response packet determined by the first transmission frequency determination method is set to be higher than the transmission frequency of the response packet determined by the second transmission frequency determination method of the reception traffic. Acceleration device. When the response transmission frequency determining means uses the first transmission frequency determining method, the higher the target transmission speed, the higher the transmission frequency of the response packet, or the higher the current transmission speed, the higher the transmission frequency of the response packet. using smaller function, determines the transmission frequency of the response packet, optimization device of the received traffic according to claim 1. When the first transmission frequency determination method is used, the response transmission frequency determination means divides the target transmission speed by the current transmission speed, multiplies the value by the first constant power or the first constant, and then the first. The speed-up device for receiving traffic according to claim 1 or 2 , wherein the transmission frequency of the response packet is determined by using a value obtained by subtracting a constant of 2. When the second transmission frequency determination method is used, the response transmission frequency determining means determines the transmission frequency of the response packet by using a function in which the transmission frequency of the response packet decreases as the current transmission speed increases. optimization device for receiving traffic according to any one of claims 1 to 3. The response transmission frequency determination means determines that the first transmission frequency determination method is used when the current transmission speed is smaller than the value obtained by multiplying the target transmission speed by the third constant, and in other cases. the second determines that use of the transmission frequency determining method, optimization device for receiving traffic according to any one of claims 1 to 4. When the protocol used for communication between the data transmitting device and the data receiving device is TCP (Transmission Control Protocol),
Further equipped with a transmission control state estimation means for estimating whether the congestion control state in the data transmission device is slow start or congestion avoidance based on the reception status of the data packet and the current transmission speed.
When the transmission control state estimating means estimates that the congestion control state is slow start, the response transmission frequency determining means determines that the first transmission frequency determining method is used, and determines that congestion avoidance is achieved. when it is estimated, it is determined that the use of the second transmission frequency determining method, high-speed device of the received traffic according to any one of claims 1 to 4. It is applied to a relay server installed between the data transmitting device and the data receiving device.
The target transmission speed estimation means estimates the first usable band in the network between the data transmission device and the relay server based on the reception status of the data packet from the data transmission device, and receives the data. The second usable band in the network between the relay server and the data receiving device is estimated based on the reception status of the response packet from the device or the rate of change in the amount of data accumulated in the relay server. The device for increasing the speed of reception traffic according to any one of claims 1 to 6 , wherein the target transmission speed is estimated based on the first usable band and the second usable band. A method for speeding up reception traffic used in a data receiving device that returns a response packet to a data packet received from a data transmitting device.
The available bandwidth of the network is estimated based on the reception result of the data packet, and the target transmission speed is estimated based on the estimated available bandwidth.
Based on the reception result of the data packet, the current transmission speed at which the data packet is transmitted by the data transmission device is estimated.
Based on the estimated target transmission speed and the estimated current transmission speed, the transmission frequency of the response packet is determined so that the current transmission speed approaches the target transmission speed .
In the determination of the transmission frequency of the response packet, it is determined which of the first transmission frequency determination method and the second transmission frequency determination method is used to determine the transmission frequency of the response packet according to the conditions.
Transmission frequency of the response packet is determined by said first transmission frequency determination method, the it is configured to be larger than the transmission frequency of the second response packet that is determined by the transmission frequency determining method, the received traffic How to speed up. A reception traffic acceleration program used in a data receiving device that returns a response packet to a data packet received from a data transmitting device.
On the computer
Target transmission speed estimation processing that estimates the available bandwidth of the network based on the reception result of the data packet and estimates the target transmission speed based on the estimated available bandwidth.
Based on the reception result of the data packet, the current transmission speed estimation process for estimating the current transmission speed of transmitting the data packet by the data transmission device, and the current transmission speed estimation process.
Based on the estimated target transmission speed and the estimated current transmission speed, a response transmission frequency determination process for determining the transmission frequency of the response packet so that the current transmission speed approaches the target transmission speed is executed. Is a thing
In the response transmission frequency determination process, it is determined which of the first transmission frequency determination method and the second transmission frequency determination method is used to determine the transmission frequency of the response packet according to the conditions.
The transmission frequency of the response packet determined by the first transmission frequency determination method is set to be higher than the transmission frequency of the response packet determined by the second transmission frequency determination method of the reception traffic. Acceleration program.

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