WO2017077704A1 - スループット計測装置、方法および記録媒体 - Google Patents
スループット計測装置、方法および記録媒体 Download PDFInfo
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- WO2017077704A1 WO2017077704A1 PCT/JP2016/004780 JP2016004780W WO2017077704A1 WO 2017077704 A1 WO2017077704 A1 WO 2017077704A1 JP 2016004780 W JP2016004780 W JP 2016004780W WO 2017077704 A1 WO2017077704 A1 WO 2017077704A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0876—Network utilisation, e.g. volume of load or congestion level
- H04L43/0888—Throughput
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
- H04L43/0829—Packet loss
- H04L43/0841—Round trip packet loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0852—Delays
- H04L43/0864—Round trip delays
Definitions
- the present invention relates to a throughput measuring apparatus, method, and recording medium for measuring throughput in an application layer.
- the throughput between the transmission device and the reception device is defined as a value obtained by dividing the amount of measurement data transmitted from the transmission device to the reception device by the transmission time required for transmission of the measurement data.
- the transmission time is a transmission time between the transport layers of the transmission device and the reception device (corresponding to true duration in FIG. 16).
- FIG. 16 is a diagram illustrating the time passage of measurement data transmitted from the application of the transmission device to the application of the reception device.
- a thick arrow represents a flow of transmission of measurement data output from the application layer.
- the measurement data output from the application of the transmitting device is transmitted from the transport layer of the transmitting device to the transport layer of the receiving device and passed to the application of the receiving device.
- the transmission time between the transport layers is the time from when the first packet of measurement data is transmitted from the transport layer until the last packet is received by the transport layer of the receiving device.
- the amount of measurement data needs to be sufficiently larger than the size of the transmission buffer in the transport layer of the transmission device. This is because when the measurement data is smaller than the size of the transmission buffer, the measurement data can be instantaneously transferred from the application layer to the transmission buffer in the transport layer, so that the transmission appears to be completed instantaneously from the application layer. As a result, the transmission time viewed from the application layer becomes almost zero, so that a measurement error in throughput increases.
- the throughput is theoretically calculated based on the retransmission occurrence rate, the average packet round-trip delay time, the packet loss rate, and the like.
- the throughput can be measured in a form that does not depend on the size of the measurement data.
- an error from the actual throughput may increase in an environment in which spike delay or burst loss is likely to occur, for example, in a network with a large fluctuation such as a mobile network.
- the packet loss rate in the denominator of the theoretical value calculation formula is close to 0, so the theoretical value is the actual throughput. May be larger.
- An object of the present invention is to provide a throughput measuring device, a method, and a recording medium capable of measuring the throughput with high accuracy in the application layer.
- the throughput measuring apparatus of the present invention includes a data transmitting unit that transmits data to a receiving device, a feedback receiving unit that receives feedback indicating completion of reception of the data from the receiving device, Boundary value calculating means for calculating a boundary value of a range of values that the throughput can take based on feedback and the amount of transmission data of the data; theoretical value measuring means for measuring the theoretical value of the throughput; and Output means for outputting the boundary value when the value is outside the range, and outputting the theoretical value when the theoretical value is included in the range.
- data can be transmitted to a receiving device, feedback indicating the completion of reception of the data can be received from the receiving device, and throughput can be obtained based on the feedback and the transmission data amount of the data.
- the throughput measuring program recorded on the computer-readable recording medium of the present invention receives a data transmission function for transmitting data to the receiving device and feedback indicating completion of reception of the data from the receiving device.
- a feedback reception function a boundary value calculation function that calculates a boundary value of a range of values that the throughput can take based on the feedback and the amount of transmission data of the data, a theoretical value measurement function that measures the theoretical value of the throughput,
- An output function for outputting the boundary value when the theoretical value is out of the range and outputting the theoretical value when the theoretical value is included in the range is realized.
- the throughput measuring apparatus, method, and recording medium of the present invention can measure the throughput with high accuracy in the application layer.
- FIG. 1 shows a configuration example of the throughput measuring apparatus 10 of the present embodiment.
- the throughput measuring apparatus 10 of this embodiment includes a data transmitting unit 11, a feedback receiving unit 12, a boundary value calculating unit 13, a theoretical value measuring unit 14, and an output unit 15.
- the data transmission unit 11 is a part that transmits data to the receiving device.
- the feedback receiving unit 12 is a part that receives feedback indicating completion of data reception from the receiving device.
- the boundary value calculation unit 13 is a part that calculates a boundary value within a range of values that the throughput can take based on feedback and the amount of data transmitted.
- the theoretical value measuring unit 14 is a part that measures the theoretical value of the throughput.
- the output unit 15 is a part that outputs a boundary value when the theoretical value is out of the range of values that the throughput can take, and outputs a theoretical value when the theoretical value is included in the range.
- the throughput measuring apparatus 10 By configuring the throughput measuring apparatus 10 in this way, when the theoretical value is out of the range of values that the throughput can take, a boundary value closer to the true throughput can be output as the throughput. Therefore, it becomes possible to measure the throughput with high accuracy in the application layer.
- FIG. 2 shows an example of the operation of the throughput measuring apparatus 10 of the present embodiment.
- the data transmitting unit 11 of the throughput measuring apparatus 10 transmits data to the receiving apparatus (step S101). Then, the feedback receiving unit 12 receives feedback indicating the completion of data reception from the receiving device (step S102).
- Boundary value calculation unit 13 calculates a boundary value within a range of values that the throughput can take based on feedback and the amount of data transmitted (step S103).
- the theoretical value measuring unit 14 measures the theoretical value of the throughput (step S104).
- the output unit 15 outputs a boundary value when the theoretical value is out of the range of values that the throughput can take, and outputs a theoretical value when the theoretical value is included in the range (step S105).
- the feedback indicating the completion of data reception is received from the receiving apparatus, and the boundary value of the throughput is calculated based on the feedback.
- the boundary value is output.
- the configuration example of the throughput measuring apparatus 10 is the same as that of the first embodiment. As shown in FIG. 3, the throughput measuring apparatus 10 transmits / receives data to / from the receiving apparatus 40 via the network.
- the data transmission unit 11 of the throughput measurement device 10 is a part that transmits data to the reception device 40.
- data is intermittently transmitted to the receiving device 40 by TCP (Transmission Control Protocol).
- TCP Transmission Control Protocol
- the data to be transmitted here is assumed to be data of an application whose behavior changes depending on the throughput, for example, an application such as adaptive video distribution whose image quality changes depending on the throughput.
- the feedback receiving unit 12 is a part that receives feedback indicating the completion of data reception from the receiving device 40.
- the data reception start time and reception completion time are received as feedback.
- an elapsed reception time from the data reception start time to the reception completion time may be received.
- the boundary value calculation unit 13 is a part that calculates the upper limit value of the throughput based on the feedback and the amount of transmitted data. Note that the amount of data received by the receiving device may be received as feedback, and the upper limit value may be calculated using the amount of received data instead of the amount of transmitted data.
- the theoretical value measuring unit 14 is a part that measures the theoretical value of the throughput.
- the output unit 15 is a part that outputs an upper limit value when the theoretical value is larger than the upper limit value, and outputs a theoretical value when the theoretical value is less than or equal to the upper limit value.
- the receiving device 40 includes a data receiving unit 41, a measuring unit 42, and a feedback transmitting unit 43.
- the data receiving unit 41 of the receiving device 40 is a part that receives data transmitted by the data transmitting unit 11 of the throughput measuring device 10.
- the data received by the data receiving unit 41 is received after being fragmented into the size of the reception buffer.
- the measurement unit 42 is a part that measures the data reception start time and reception completion time.
- the reception start time is the time when reception of the first data fragmented by the data receiving unit 41 is started.
- the reception completion time is the time when reception of the last data fragmented by the data reception unit 41 is started (or completed).
- the feedback transmission unit 43 is a part that transmits feedback to the feedback reception unit 12 of the throughput measuring apparatus 10.
- the data reception start time and reception completion time are transmitted as feedback. Note that, as feedback, the reception elapsed time from the data reception start time to the reception completion time may be transmitted.
- the configuration of the theoretical value measurement unit 14 is not limited to the configuration example of FIG. 4, but in the present embodiment, as a specific example, a theoretical value is calculated from a round trip time (hereinafter referred to as RTT (RoundRTrip Time)) and a packet loss rate. A method of measuring the will be described.
- RTT Round Trip Time
- FIG. 4 is a configuration example of the theoretical value measuring unit 14 of the throughput measuring apparatus 10.
- FIG. 5 is a configuration example of the receiving device 50 when the theoretical value measurement unit 14 has the configuration example of FIG.
- the present embodiment will be described using the receiving device 50 instead of the receiving device 40.
- the theoretical value measuring unit 14 includes, for example, a theoretical value packet transmitting / receiving unit 141, a loss rate measuring unit 142, an RTT measuring unit 143, and a calculating unit 144.
- the theoretical value packet transmitting / receiving unit 141 of the theoretical value measuring unit 14 is a part that transmits / receives a theoretical value measuring packet to / from the theoretical value packet transmitting / receiving unit 54 of the receiving device 50.
- the packet loss rate and RTT necessary for the theoretical value measurement are acquired by transmitting and receiving a UDP (User Datagram Protocol) packet for theoretical value measurement.
- UDP User Datagram Protocol
- the theoretical value measurement packet can also be transmitted by a protocol other than UDP.
- the TCP transmission rate is generally several hundred kbps or more.
- the UDP packet transmission rate for theoretical value measurement can be realized at 1 kbps or less. Therefore, the influence of transmission / reception of the theoretical value measurement packet on the calculation of the upper limit value and the lower limit value is at a level that can be sufficiently ignored.
- the loss rate measuring unit 142 is a part that measures the packet loss rate of the UDP packet transmitted / received by the theoretical value packet transmitting / receiving unit 141.
- the RTT measuring unit 143 is a part that measures the RTT of the UDP packet transmitted / received by the theoretical value packet transmitting / receiving unit 141.
- the calculation unit 144 is a part that calculates the theoretical value of the throughput based on the packet loss rate measured by the loss rate measurement unit 142 and the RTT measured by the RTT measurement unit 143.
- the receiving device 50 has a configuration in which a theoretical value packet transmitting / receiving unit 54 is added to the receiving device 40.
- the theoretical value packet transmission / reception unit 54 is a part that transmits / receives a UDP packet to / from the theoretical value packet transmission / reception unit 141 of the theoretical value measurement unit 14.
- FIG. 6 shows an example of the operation of the throughput measuring apparatus 10.
- the data transmission unit 11 of the throughput measuring device 10 transmits TCP data to the data reception unit 41 of the reception device 50 (step S201).
- the relationship between the sizes di_fj_size and di_size of the data di_fj is expressed by Equation 1.
- the measurement unit 42 of the receiving device 50 feeds back the reception start time (time when di_f1 is received) di_f1_t and the reception completion time (time when di_fn is received) di_fn_t. It passes to the transmission unit 43.
- the feedback transmission unit 43 transmits the reception start time di_f1_t and the reception completion time di_fn_t to the feedback reception unit 12 of the throughput measuring apparatus 10. Then, the feedback receiving unit 12 receives feedback (step S202).
- the boundary value calculation unit 13 stores the reception elapsed time di_t of the data di, that is, the elapsed time [sec] from the reception start time di_f1_t to the reception completion time di_fn_t, and the transmission data size di_size [bit]. At this time, the relationship between the reception start time, the reception completion time, and the elapsed time is as shown in FIG.
- FIG. 7 is a diagram illustrating the passage of time of measurement data transmitted by the transmission device.
- the reception start time is the time when the application layer of the receiving apparatus starts receiving measurement data
- the reception completion time is the time when the application layer of the receiving apparatus completes reception of measurement data.
- the elapsed time of reception is the elapsed time from the reception start time to the reception completion time.
- the boundary value calculation unit 13 calculates the upper limit value of the throughput (step S205). If the feedback receiving unit 12 has received feedback m times during a predetermined time, the upper limit value can be calculated as shown in Equation 2, for example. Since the data reception elapsed time often includes an error, in this embodiment, in order to reduce the measurement error, the upper limit value is calculated from feedback for a predetermined time.
- the theoretical value measuring unit 14 of the throughput measuring apparatus 10 calculates the theoretical value of the throughput.
- a method for calculating the TCP throughput from the RTT and the packet loss rate between the throughput measuring apparatus 10 and the receiving apparatus 50 will be described.
- the theoretical value packet transmitting / receiving unit 141 of the throughput measuring apparatus 10 transmits / receives a theoretical value measuring UDP packet to / from the theoretical value packet transmitting / receiving unit 54 of the receiving apparatus 50 (step S203).
- the loss rate measurement unit 142 measures the packet loss rate
- the RTT measurement unit 143 measures the RTT (step S204).
- the calculation unit 144 calculates a theoretical value of the throughput (step S206).
- TCP window size W it is assumed that the relationship between the TCP window size W and time changes as shown in FIG. 8 in accordance with TCP New Reno.
- TCP New Reno when packet loss occurs due to congestion, the window size W is made half of the window size W0 at that time, and the window size is increased for each packet. Therefore, a W0 / 2 packet is required for the window size that has become W0 / 2 to return to W0.
- the relationship between the packet loss rate p and the window size W0 when the packet loss occurs is expressed by Equation 3.
- the output unit 15 After calculating the upper limit (step S205) and the theoretical value (step S206), the output unit 15 outputs the throughput (step S207).
- the throughput output operation of the output unit 15 is shown in FIG.
- the output unit 15 When the theoretical value is larger than the upper limit value (step S301), the output unit 15 outputs the upper limit value (step S302).
- the output unit 15 When the theoretical value is less than or equal to the upper limit value, the output unit 15 outputs the theoretical value (step S303).
- the elapsed time of reception used to calculate the upper limit of throughput is smaller than the true transmission time (true duration) as shown in FIG. Therefore, the true throughput is smaller than the upper limit value calculated in the present embodiment. Therefore, when the theoretical value is larger than the upper limit value, it can be determined that the accuracy of the theoretical value is low. Then, by outputting the upper limit value closer to the true throughput as the measurement throughput, it is possible to improve the accuracy of the measurement throughput.
- the data transmitted between the throughput measuring device 10 and the receiving device 50 is intermittently transmitted, for example, data such as a video frame in live video distribution.
- the throughput measuring device 10 transmits video data of 30 frames per second to the receiving device 50.
- the throughput measuring apparatus 10 receives a throughput output request once per second and outputs the throughput.
- the measuring unit 42 of the receiving device 50 holds the reception start time i_1_t of the fragmented video frame i_1.
- the measuring unit 42 holds the reception completion time i_n_t of the last fragmented data i_n of the video frame i.
- the feedback transmission unit 43 transmits feedback including the reception start time i_1_t and the reception completion time i_n_t to the feedback reception unit 12 of the throughput measuring apparatus 10.
- the feedback receiver 12 receives feedback from the feedback transmitter 43.
- the boundary value calculation unit 13 holds an elapsed reception time i_t from the reception start time i_1_t to the reception completion time i_n_t.
- the data amount i_size of the video frame i transmitted by the data transmission unit 11 is held.
- the boundary value calculation unit 13 calculates the upper limit value of the throughput using Expression 2.
- Equation 2 when m is 30, di_size is i_size, and di_t is i_t, the upper limit value can be calculated.
- the upper limit value is calculated as 2.1 Mbps.
- the theoretical value packet transmitting / receiving unit 141 of the theoretical value measuring unit 14 of the throughput measuring apparatus 10 transmits and receives a UDP packet to and from the theoretical value packet transmitting / receiving unit 54 of the receiving apparatus 50 to measure the RTT and the packet loss rate. To do.
- Any method can be used as a method for measuring the RTT and the packet loss rate.
- FIG. 10 is a diagram illustrating a time lapse of packets transmitted and received between the transmission side and the reception side and a sequence number of each packet.
- the theoretical value packet transmission / reception unit 141 holds the sequence number u of the received UDP packet and transmits the UDP packet with the sequence number u + 1.
- the theoretical value packet transmitting / receiving unit 54 transmits a UDP packet having the same sequence number as the received UDP packet.
- the loss rate measuring unit 142 can determine the presence or absence of packet loss by comparing the sequence number of the received UDP packet with the sequence number of the UDP packet received immediately before. In the case of the example in FIG. 10, when the packet with the sequence number u + 2 is received, it is possible to determine that a packet loss has occurred because the sequence number of the packet received immediately before is u.
- the RTT measuring unit 143 can measure the difference between the transmission time of the UDP packet with the sequence number u and the reception time of the UDP packet with the sequence number u as the RTT.
- the theoretical value measurement unit 14 calculates a theoretical value using, for example, Equation 5.
- the theoretical value is calculated as 2.6 Mbps.
- the output unit 15 After measuring the upper limit value and the theoretical value, the output unit 15 outputs the upper limit value when the theoretical value is larger than the upper limit value, and outputs the theoretical value when the theoretical value is less than or equal to the upper limit value.
- the upper limit value since the upper limit value is 2.1 Mbps and the theoretical value is 2.6 Mbps, the upper limit value of 2.1 Mbps is output.
- the feedback regarding the data reception time is received from the receiving apparatus, and the upper limit value of the throughput is calculated based on the feedback.
- the upper limit value is output.
- the upper limit value can be output as the throughput. Therefore, it becomes possible to measure the throughput with high accuracy in the application layer.
- the upper limit value is calculated as the boundary value.
- the case where the lower limit value is calculated as the boundary value in the throughput measuring apparatus 10 will be specifically described.
- the configuration example of the throughput measuring apparatus 10 is the same as that of the first embodiment (FIG. 1). Similar to the throughput measurement apparatus 10 of the first embodiment, the throughput measurement apparatus 10 transmits and receives data to and from the reception apparatus 40 via a network as shown in FIG.
- the data transmission unit 11 of the throughput measurement device 10 is a part that transmits data to the reception device 40.
- data is intermittently transmitted to the receiving device 40 by TCP.
- the feedback receiving unit 12 is a part that receives feedback indicating the completion of data reception from the receiving device 40.
- the boundary value calculation unit 13 is a part that calculates the lower limit value of the throughput based on the data transmission start time, the feedback reception time when the feedback is received, and the data transmission data amount.
- the theoretical value measuring unit 14 is a part that measures the theoretical value of the throughput.
- the output unit 15 is a part that outputs a lower limit value when the theoretical value is smaller than the lower limit value, and outputs a theoretical value when the theoretical value is greater than or equal to the lower limit value.
- the receiving device 40 includes a data receiving unit 41, a measuring unit 42, and a feedback transmitting unit 43.
- the data receiving unit 41 of the receiving device 40 is a part that receives data transmitted by the data transmitting unit 11 of the throughput measuring device 10.
- the data received by the data receiving unit 41 is received after being fragmented into the size of the reception buffer.
- the measurement unit 42 is a part that notifies the feedback transmission unit 43 of the completion of reception when data reception is completed.
- the feedback transmission unit 43 is a part that transmits feedback to the feedback reception unit 12 of the throughput measuring apparatus 10 when reception of data is completed.
- any method can be used as the method for measuring the theoretical value of the throughput of the present embodiment.
- the theoretical value can be measured from the RTT and the packet loss rate by the theoretical value measuring unit 14 in FIG. 4 and the receiving device 50 in FIG.
- the present embodiment will be described using the theoretical value measurement unit 14 in FIG. 4 as the theoretical value measurement unit 14 and the reception device 50 in FIG. 5 instead of the reception device 40.
- the throughput measuring device 10 and the receiving devices (40, 50) in this manner, when the theoretical value falls below the lower limit value, it is possible to output a lower limit value closer to the true throughput as the measured throughput. Become. Therefore, it becomes possible to measure the throughput with high accuracy in the application layer.
- the data transmission unit 11 transmits TCP data to the reception device 50 (step S201).
- the measurement unit 42 of the reception device 50 notifies the feedback transmission unit 43 of the completion of reception.
- the feedback transmission unit 43 transmits feedback indicating the completion of reception to the feedback reception unit 12 of the throughput measuring apparatus 10. Then, the feedback receiving unit 12 receives feedback (step S202).
- the boundary value calculation unit 13 calculates di_rtt that is the RTT of the data di from the time di_start at which transmission of the data di is started and the time di_end at which feedback information on the data di is received. Then, RTT di_rtt and data size di_size [bit] of the data di are stored.
- FIG. 11 shows the relationship between transmission start time, feedback reception time, and transmission elapsed time (RTT).
- FIG. 11 is a diagram illustrating the passage of time of the measurement data transmitted by the transmission device.
- the transmission start time is the time when the application layer of the transmission apparatus starts transmitting measurement data
- the feedback reception time is the time when the application layer of the transmission apparatus receives feedback transmitted from the reception apparatus.
- the application layer of the receiving device transmits feedback to the transmitting device when the reception of the measurement data is completed.
- the elapsed time of transmission is the elapsed time from the transmission start time to the feedback reception time.
- the boundary value calculation unit 13 calculates a lower limit value of the throughput (step S205). If the feedback receiving unit 12 has received feedback m times during a predetermined time, the lower limit value can be calculated as shown in Equation 6, for example. Since the data transmission elapsed time often includes an error, in this embodiment, in order to reduce the measurement error, the lower limit value is calculated from feedback for a predetermined time.
- the base station performs buffering for scheduling packets. Therefore, when the amount of feedback data is small, the propagation delay of feedback increases due to the influence of buffering, and di_rtt may be larger than true duration. At this time, if the lower limit value is calculated by Equation 6, the lower limit value approaches 0. Therefore, in a network in which the propagation delay of feedback is assumed to be large, di_rtt is made closer to true duration by using, as di_rtt, a value obtained by subtracting the minimum time required for feedback transmission from di_rtt. Can be considered.
- the RTT measured by the theoretical value measurement unit 14 is assumed as the minimum time required for transmission of feedback. It is also possible to use half the time.
- the theoretical value measuring unit 14 of the throughput measuring apparatus 10 calculates the theoretical value of the throughput.
- the theoretical value packet transmitting / receiving unit 141 of the throughput measuring apparatus 10 transmits / receives theoretical value measuring UDP data to / from the theoretical value packet transmitting / receiving unit 54 of the receiving apparatus 50 (step S203).
- the loss rate measurement unit 142 measures the packet loss rate
- the RTT measurement unit 143 measures the RTT (step S204).
- the calculation unit 144 calculates a theoretical value of the throughput (step S206).
- omitted is abbreviate
- the output unit 15 After calculating the boundary value (lower limit value) (step S205) and the theoretical value (step S206), the output unit 15 outputs the throughput (step S207).
- the throughput output operation of the output unit 15 is shown in FIG.
- the output unit 15 When the theoretical value is smaller than the lower limit value (step S401), the output unit 15 outputs the lower limit value (step S402).
- the output unit 15 When the theoretical value is greater than or equal to the lower limit value, the output unit 15 outputs the theoretical value (step S403).
- the elapsed time of transmission used to calculate the lower limit value of the throughput is longer than the true transmission time (true duration) as shown in FIG. Therefore, the true throughput is larger than the lower limit value calculated in the present embodiment. Therefore, when the theoretical value is smaller than the lower limit value, it can be determined that the accuracy of the theoretical value is low. By outputting the lower limit value closer to the true throughput as the measurement throughput, it is possible to improve the accuracy of the measurement throughput.
- the data transmitted between the throughput measuring device 10 and the receiving device 50 is intermittently transmitted, for example, data such as a video frame in live video distribution.
- the throughput measuring device 10 transmits video data of 30 frames per second to the receiving device 50.
- the throughput measuring apparatus 10 receives a throughput output request once per second and outputs the throughput.
- the measurement unit 42 of the reception device 50 notifies the feedback transmission unit 43 of the completion of reception. Then, the feedback transmission unit 43 transmits the feedback to the feedback reception unit 12 of the throughput measurement device 10.
- the feedback receiver 12 receives feedback from the feedback transmitter 43. Then, the boundary value calculation unit 13 holds the transmission elapsed time i_rtt from the transmission start time f_i_start of the video frame i to the time f_i_end when the feedback is received. The data amount i_size of the video frame i transmitted by the data transmission unit 11 is held.
- the boundary value calculation unit 13 calculates the lower limit value of the throughput using Expression 6.
- Equation 6 when m is 30, di_size is i_size, and di_rtt is i_rtt, the lower limit value can be calculated.
- the lower limit value is calculated as 1.7 Mbps.
- the theoretical value packet transmitting / receiving unit 141 of the theoretical value measuring unit 14 of the throughput measuring apparatus 10 transmits / receives a UDP packet with the theoretical value packet transmitting / receiving unit 54 of the receiving apparatus 50, and measures the RTT and the packet loss rate. Then, the theoretical value measurement unit 14 calculates a theoretical value.
- the method for measuring the RTT and the packet loss rate and the method for calculating the theoretical value are the same as in the second embodiment. Here, it is assumed that the theoretical value is calculated as 2.6 Mbps.
- the output unit 15 After measuring the lower limit value and the theoretical value, the output unit 15 outputs the lower limit value when the theoretical value is smaller than the lower limit value, and outputs the theoretical value when the theoretical value is greater than or equal to the lower limit value.
- the lower limit value is 1.7 Mbps and the theoretical value is 2.6 Mbps, the theoretical value 2.6 Mbps is output.
- the feedback indicating the completion of data reception is received from the receiving device, and the lower limit of the throughput is determined based on the data transmission start time, the feedback reception time, and the transmission data amount. Calculate the value.
- the lower limit value is output.
- the lower limit value can be output as the throughput. Therefore, it becomes possible to measure the throughput with high accuracy in the application layer.
- the boundary value calculation unit performs both the calculation of the upper limit value of the throughput and the calculation of the lower limit value.
- the configuration example of the throughput measuring apparatus 10 of this embodiment is the same as that shown in FIG.
- the throughput measuring apparatus 10 includes a data transmitting unit 11, a feedback receiving unit 12, a boundary value calculating unit 13, a theoretical value measuring unit 14, and an output unit 15.
- the data transmission unit 11 is a part that transmits data to the receiving device.
- data is intermittently transmitted to the receiving device by TCP.
- the feedback receiving unit 12 is a part that receives feedback related to the data reception time from the receiving device.
- the data reception start time and reception completion time are received as feedback.
- the boundary value calculation unit 13 is a part for calculating the upper limit value and the lower limit value of the throughput.
- the upper limit value of the throughput is calculated based on the feedback and the amount of transmitted data.
- the lower limit value of the throughput is calculated based on the data transmission start time, the feedback reception time when the feedback is received, and the data transmission data amount.
- the theoretical value measuring unit 14 is a part that measures the theoretical value of the throughput.
- the output unit 15 outputs an upper limit value when the theoretical value is greater than the upper limit value, outputs a lower limit value when the theoretical value is smaller than the lower limit value, and outputs a theoretical value when the theoretical value is less than or equal to the upper limit value and greater than or equal to the lower limit value.
- the throughput measuring apparatus 10 By configuring the throughput measuring apparatus 10 in this way, it becomes possible to measure the throughput with high accuracy in the application layer.
- the upper limit value and the lower limit value are calculated in step S205, and any one of the upper limit value, the lower limit value, and the theoretical value is output in step S207.
- the reception start time and the reception completion time are received by feedback. Then, an upper limit value of the throughput is calculated from the reception start time, the reception completion time, and the transmission data amount. Further, the lower limit value of the throughput is calculated from the transmission start time at which data transmission is started, the feedback reception time at which feedback is received, and the transmission data amount.
- step S501 when the theoretical value is larger than the upper limit value (step S501), the output unit 35 outputs the upper limit value (step S502). When the theoretical value is smaller than the lower limit value (step S503), the output unit 35 outputs the lower limit value (step S504). When the theoretical value is not less than the lower limit value and not more than the upper limit value, the output unit 35 outputs the theoretical value (step S505).
- FIG. 14 is a diagram illustrating an elapsed time of transmission.
- the elapsed time from the transmission start time to the feedback reception time is the transmission elapsed time
- the transmission elapsed time is from the transmission start time to the reception completion time.
- the reception completion time can be received by being included in the feedback, and is received for calculating the upper limit value in the present embodiment.
- the transmission elapsed time is affected by the clock error, so that the throughput measurement accuracy is lowered.
- the transmission elapsed time can be calculated without being affected by the clock error.
- the feedback regarding the data reception time is received from the receiving apparatus, and the upper limit value of the throughput is calculated based on the feedback.
- the upper limit value is output.
- the upper limit value can be output as the throughput.
- feedback indicating the completion of data reception is received from the receiving apparatus, and a lower limit value of the throughput is calculated based on the data transmission start time, the feedback reception time, and the transmission data amount.
- the lower limit value is output. As a result, when the theoretical value becomes smaller than the true throughput due to disturbance, the lower limit value can be output as the throughput. Therefore, it becomes possible to measure the throughput with high accuracy in the application layer.
- the throughput measuring apparatus 10 may be realized using at least two information processing apparatuses physically or functionally. Further, the throughput measuring device 10 may be realized as a dedicated device. Further, only some functions of the throughput measuring apparatus 10 may be realized using an information processing apparatus.
- FIG. 15 is a diagram schematically illustrating a hardware configuration example of an information processing apparatus capable of realizing the throughput measurement apparatus according to each embodiment of the present invention.
- the information processing device 70 includes a communication interface 71, an input / output interface 72, an arithmetic device 73, a storage device 74, a nonvolatile storage device 75, and a drive device 76.
- the communication interface 71 is a communication means for the throughput measuring device 10 of each embodiment to communicate with an external device by wire or / and wirelessly.
- the apparatuses may be connected so as to be able to communicate with each other via the communication interface 71.
- the input / output interface 72 is a man-machine interface such as a keyboard that is an example of an input device and a display as an output device.
- the calculation device 73 is a calculation processing device such as a general-purpose CPU (Central Processing Unit) or a microprocessor.
- the arithmetic device 73 can read out various programs stored in the nonvolatile storage device 75 to the storage device 74 and execute processing according to the read programs.
- the storage device 74 is a memory device such as a RAM (Random Access Memory) that can be referred to from the arithmetic device 73, and stores programs, various data, and the like.
- the storage device 74 may be a volatile memory device.
- the nonvolatile storage device 75 is a nonvolatile storage device such as a ROM (Read Only Memory) or a flash memory, and can record various programs and data.
- the drive device 76 is, for example, a device that processes reading and writing of data with respect to a recording medium 77 described later.
- the recording medium 77 is an arbitrary recording medium capable of recording data, such as an optical disk, a magneto-optical disk, and a semiconductor flash memory.
- the throughput measuring apparatus 10 is configured by the information processing apparatus 70 illustrated in FIG. 15, and a program capable of realizing the functions described in each of the above embodiments is provided for this throughput measuring apparatus. You may implement
- the embodiment can be realized by the arithmetic device 73 executing the program supplied to the throughput measuring device. It is also possible to configure some of the functions of the information processing device 70 instead of all of the throughput measuring device.
- the program may be recorded in the recording medium 77 so that the program is appropriately stored in the nonvolatile storage device 75 at the shipment stage or the operation stage of the throughput measuring apparatus.
- a method of installing in a throughput measuring apparatus using an appropriate jig may be employed in a manufacturing stage before shipment or an operation stage.
- the program supply method may employ a general procedure such as a method of downloading from the outside via a communication line such as the Internet.
- (Appendix 1) Data transmitting means for transmitting data to the receiving device; Feedback receiving means for receiving feedback indicating completion of reception of the data from the receiving device; Boundary value calculation means for calculating a boundary value of a range of values that throughput can take based on the feedback and the amount of transmission data of the data; A theoretical value measuring means for measuring the theoretical value of the throughput; An output means for outputting the boundary value when the theoretical value is out of the range, and outputting the theoretical value when the theoretical value is included in the range;
- the boundary value includes an upper limit value
- the boundary value calculating means calculates the upper limit value based on the feedback and the transmission data amount of the data,
- the throughput measuring apparatus according to appendix 1, wherein the output means outputs the upper limit value when the theoretical value is larger than the upper limit value.
- the feedback includes a reception start time and a reception completion time when the receiving device receives the data,
- the throughput measurement apparatus according to appendix 2 wherein the boundary value calculation means calculates the upper limit value based on a reception elapsed time from the reception start time to the reception completion time and the transmission data amount.
- the feedback includes an elapsed reception time from a reception start time to a reception completion time when the receiving device receives the data,
- the throughput measurement apparatus according to appendix 2, wherein the boundary value calculation means calculates the upper limit value based on the elapsed reception time and the amount of transmission data.
- the feedback includes an amount of received data when the receiving device receives the data, The throughput measurement device according to any one of appendix 2 to appendix 4, wherein the boundary value calculation unit calculates the upper limit value based on the received data amount instead of the transmission data amount.
- the boundary value includes a lower limit value
- the boundary value calculating means calculates a lower limit value of the throughput based on a transmission start time at which transmission of the data is started, a transmission completion time, and the transmission data amount,
- the throughput measuring apparatus according to any one of appendix 1 to appendix 5, wherein the output means outputs the lower limit value when the theoretical value is smaller than the lower limit value.
- Appendix 7 The throughput measuring apparatus according to appendix 6, wherein the transmission completion time is a feedback reception time when the feedback is received.
- the feedback includes a reception completion time when the reception device has completed reception of the data, The throughput measuring apparatus according to appendix 6, wherein the transmission completion time is the reception completion time.
- Appendix 10 The throughput measuring apparatus according to any one of appendix 1 to appendix 9, wherein the transmission unit transmits the data by TCP (Transmission Control Protocol).
- TCP Transmission Control Protocol
- a receiving apparatus comprising:
- the measuring means measures the data reception completion time; The receiving apparatus according to appendix 12, wherein the feedback includes the reception completion time.
- the measuring means measures the reception start time of the data; The receiving apparatus according to appendix 13, wherein the feedback includes the reception start time.
- the measuring means calculates a reception elapsed time by measuring a reception start time and a reception completion time of the data, The receiving apparatus according to appendix 12 or appendix 13, wherein the feedback includes the elapsed reception time.
- the measuring means measures the amount of received data of the data, The receiving apparatus according to any one of appendix 12 to appendix 15, wherein the feedback includes the amount of received data.
- Appendix 17 The receiving apparatus according to any one of appendix 12 to appendix 16, further comprising: a theoretical value packet transmission / reception unit configured to transmit / receive a theoretical value measurement packet to / from the throughput measurement apparatus.
- Appendix 18 The throughput measuring device according to any one of appendix 1 to appendix 11, and the receiving device according to appendix 12,
- the data transmitting means transmits the data to the data receiving means;
- the throughput measuring system wherein the feedback receiving unit receives the feedback from the feedback transmitting unit.
- the throughput measuring device according to appendix 3 or appendix 8 and the receiving device according to appendix 13 are provided.
- the data transmitting means transmits the data to the data receiving means;
- the throughput measuring system wherein the feedback receiving unit receives the feedback from the feedback transmitting unit.
- the throughput measuring device according to appendix 3 and the receiving device according to appendix 14 are provided.
- the data transmitting means transmits the data to the data receiving means;
- the throughput measuring system wherein the feedback receiving unit receives the feedback from the feedback transmitting unit.
- the throughput measuring device according to appendix 4 and the receiving device according to appendix 15 are provided,
- the data transmitting means transmits the data to the data receiving means;
- the throughput measuring system wherein the feedback receiving unit receives the feedback from the feedback transmitting unit.
- the throughput measuring apparatus according to appendix 5 and the receiving apparatus according to appendix 16 are provided.
- the data transmitting means transmits the data to the data receiving means;
- the throughput measuring system wherein the feedback receiving unit receives the feedback from the feedback transmitting unit.
- the throughput measuring device according to appendix 11, and the receiving device according to appendix 17,
- the data transmitting means transmits the data to the data receiving means;
- the feedback receiving means receives the feedback from the feedback transmitting means;
- the theoretical value packet transmitting / receiving means of the throughput measuring device transmits / receives the theoretical value measuring packet to / from the theoretical value packet transmitting / receiving means of the receiving device.
- (Appendix 24) Transmitting data to the receiving device, receiving feedback indicating completion of reception of the data from the receiving device, calculating a boundary value of a range of values that the throughput can take based on the feedback and the transmission data amount of the data; Measuring the theoretical value of the throughput, outputting the boundary value when the theoretical value is out of the range, and outputting the theoretical value when the theoretical value is included in the range. Throughput measurement method.
- the boundary value includes an upper limit value, 25.
- the feedback includes a reception start time and a reception completion time when the receiving device receives the data,
- the feedback includes an elapsed reception time from a reception start time to a reception completion time when the receiving device receives the data,
- the feedback includes an amount of received data when the receiving device receives the data,
- the throughput measurement method according to any one of appendix 25 to appendix 27, wherein the throughput measurement method calculates the upper limit value based on the reception data amount instead of the transmission data amount.
- the boundary value includes a lower limit value
- the throughput measurement method calculates a lower limit value of the throughput based on a transmission start time at which transmission of the data is started, a transmission completion time, and the transmission data amount, and sets the lower limit value when the theoretical value is smaller than the lower limit value.
- the throughput measuring method according to any one of appendix 24 to appendix 28, wherein the throughput is output.
- Appendix 30 The throughput measurement method according to appendix 29, wherein the transmission completion time is a feedback reception time when the feedback is received.
- the feedback includes a reception completion time when the reception device has completed reception of the data, The throughput measurement method according to appendix 29, wherein the transmission completion time is the reception completion time.
- Appendix 33 The throughput measuring method according to any one of appendix 24 to appendix 32, wherein the transmission unit transmits the data by TCP (Transmission Control Protocol).
- TCP Transmission Control Protocol
- Appendix 34 The throughput measurement method according to any one of appendix 24 to appendix 33, wherein the reception device transmits and receives a theoretical value measurement packet.
- a data receiver for receiving data from the throughput measuring device; A measurement unit for detecting completion of reception of the data; After the reception is completed, a feedback transmission unit that transmits feedback indicating the reception completion to the throughput measuring device; A receiving method comprising:
- the reception method measures the reception completion time of the data, The reception method according to attachment 35, wherein the feedback includes the reception completion time.
- the reception method measures the reception start time of the data, 37.
- the reception method calculates a reception elapsed time by measuring a reception start time and a reception completion time of the data, 37.
- the reception method according to appendix 35 or appendix 36, wherein the feedback includes the elapsed reception time.
- the reception method measures a received data amount of the data, The reception method according to any one of appendix 35 to appendix 38, wherein the feedback includes the received data amount.
- Appendix 40 The reception method according to any one of appendix 35 to appendix 39, wherein the throughput measurement device transmits and receives theoretical value measurement packets.
- a data transmission function for transmitting data to the receiving device;
- a feedback receiving function for receiving feedback indicating completion of reception of the data from the receiving device;
- a boundary value calculation function for calculating a boundary value of a range of values that the throughput can take based on the feedback and the transmission data amount of the data;
- a theoretical value measuring function for measuring the theoretical value of the throughput;
- a throughput measurement program that realizes an output function that outputs the boundary value when the theoretical value is out of the range and outputs the theoretical value when the theoretical value is included in the range.
- the boundary value includes an upper limit value
- the boundary value calculation function calculates the upper limit value based on the feedback and the transmission data amount of the data,
- the throughput measurement program according to appendix 41 wherein the output function outputs the upper limit value when the theoretical value is greater than the upper limit value.
- the feedback includes a reception start time and a reception completion time when the receiving device receives the data
- the feedback includes an elapsed reception time from a reception start time to a reception completion time when the receiving device receives the data,
- the feedback includes an amount of received data when the receiving device receives the data,
- the throughput measurement program according to any one of appendix 42 to appendix 44, wherein the boundary value calculation function calculates the upper limit value based on the received data amount instead of the transmission data amount.
- the boundary value includes a lower limit value
- the boundary value calculation function calculates a lower limit value of the throughput based on a transmission start time at which transmission of the data is started, a transmission completion time, and the transmission data amount,
- the throughput measurement program according to any one of appendix 41 to appendix 45, wherein the output function outputs the lower limit value when the theoretical value is smaller than the lower limit value.
- the feedback includes a reception completion time when the reception device has completed reception of the data, 47.
- Appendix 49 The throughput measurement program according to any one of appendix 41 to appendix 8, wherein the theoretical value measurement function measures the theoretical value based on an RTT (Round Trip Time) and a packet loss rate.
- Appendix 50 The throughput measurement program according to any one of appendix 41 to appendix 49, wherein the transmission function transmits the data using a transmission control protocol (TCP).
- TCP transmission control protocol
- Appendix 51 The throughput measurement program according to any one of appendix 41 to appendix 50, wherein the theoretical value measurement function transmits and receives theoretical value measurement packets to and from the receiving device.
- the receiving program characterized by realizing.
- the measurement function measures the reception completion time of the data, 53.
- the measurement function measures the reception start time of the data, 54.
- the reception program according to appendix 53, wherein the feedback includes the reception start time.
- the measurement function calculates a reception elapsed time by measuring a reception start time and a reception completion time of the data, 54.
- the reception program according to appendix 52 or appendix 53, wherein the feedback includes the elapsed reception time.
- the measurement function measures the amount of received data of the data, The reception program according to any one of appendix 52 to appendix 55, wherein the feedback includes the amount of received data.
- Appendix 58 A computer-readable recording medium on which the throughput measurement program according to any one of appendix 41 to appendix 51 is recorded.
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Abstract
Description
本発明の第一の実施の形態について説明する。
次に、本発明の第二の実施の形態について説明する。
次に、本発明の第三の実施の形態について説明する。
次に、本発明の第四の実施の形態について説明する。
上述した本発明の各実施形態におけるスループット計測装置10を、一つの情報処理装置(コンピュータ)を用いて実現するハードウェア資源の構成例について説明する。なお、スループット計測装置10は、物理的または機能的に少なくとも二つの情報処理装置を用いて実現してもよい。また、スループット計測装置10は、専用の装置として実現してもよい。また、スループット計測装置10の一部の機能のみを情報処理装置を用いて実現しても良い。
データを受信装置へ送信するデータ送信手段と、
前記受信装置から前記データの受信完了を示すフィードバックを受信するフィードバック受信手段と、
前記フィードバックと前記データの送信データ量に基づいてスループットが取り得る値の範囲の境界値を算出する境界値算出手段と、
前記スループットの理論値を計測する理論値計測手段と、
前記理論値が前記範囲を外れているとき、前記境界値を出力し、前記理論値が前記範囲に含まれるとき、前記理論値を出力する出力手段と
を備えることを特徴とするスループット計測装置。
前記境界値は上限値を含み、
前記境界値算出手段は、前記フィードバックと前記データの送信データ量に基づいて前記上限値を算出し、
前記出力手段は、前記理論値が前記上限値より大きいとき前記上限値を出力する
ことを特徴とする付記1に記載のスループット計測装置。
前記フィードバックは、前記受信装置が前記データを受信した際の受信開始時刻および受信完了時刻を含み、
前記境界値算出手段は、前記受信開始時刻から前記受信完了時刻までの受信経過時間と前記送信データ量に基づいて前記上限値を算出する
ことを特徴とする付記2に記載のスループット計測装置。
前記フィードバックは、前記受信装置が前記データを受信した際の受信開始時刻から受信完了時刻までの受信経過時間を含み、
前記境界値算出手段は、前記受信経過時間および前記送信データ量に基づいて前記上限値を算出する
ことを特徴とする付記2に記載のスループット計測装置。
前記フィードバックは、前記受信装置が前記データを受信した際の受信データ量を含み、
前記境界値算出手段は、前記送信データ量の代わりに前記受信データ量に基づいて前記上限値を算出する
ことを特徴とする付記2から付記4のいずれかに記載のスループット計測装置。
前記境界値は下限値を含み、
前記境界値算出手段は、前記データの送信を開始した送信開始時刻、送信完了時刻および前記送信データ量に基づき前記スループットの下限値を算出し、
前記出力手段は、前記理論値が前記下限値より小さいとき前記下限値を出力する
ことを特徴とする付記1から付記5のいずれかに記載のスループット計測装置。
前記送信完了時刻は、前記フィードバックを受信したフィードバック受信時刻である
ことを特徴とする付記6に記載のスループット計測装置。
前記フィードバックは、前記受信装置が前記データの受信を完了した受信完了時刻を含み、
前記送信完了時刻は、前記受信完了時刻である
ことを特徴とする付記6に記載のスループット計測装置。
前記理論値計測手段は、RTT(Round Trip Time)とパケットロス率により前記理論値を計測する
ことを特徴とする付記1から付記8のいずれかに記載のスループット計測装置。
前記送信手段は前記データをTCP(Transmission Control Protocol)で送信する
ことを特徴とする付記1から付記9のいずれかに記載のスループット計測装置。
前記理論値計測手段は前記受信装置と理論値計測用パケットを送受信する
ことを特徴とする付記1から付記10のいずれかに記載のスループット計測装置。
スループット計測装置からデータを受信するデータ受信手段と、
前記データの受信完了を検出する計測手段と、
前記受信完了後、前記受信完了を示すフィードバックを前記スループット計測装置へ送信するフィードバック送信手段と、
を備えることを特徴とする受信装置。
前記計測手段は、前記データの受信完了時刻を計測し、
前記フィードバックは、前記受信完了時刻を含む
ことを特徴とする付記12に記載の受信装置。
前記計測手段は、前記データの受信開始時刻を計測し、
前記フィードバックは、前記受信開始時刻を含む
ことを特徴とする付記13に記載の受信装置。
前記計測手段は、前記データの受信開始時刻と受信完了時刻を計測して受信経過時間を算出し、
前記フィードバックは、前記受信経過時間を含む
ことを特徴とする付記12あるいは付記13に記載の受信装置。
前記計測手段は、前記データの受信データ量を計測し、
前記フィードバックは、前記受信データ量を含む
ことを特徴とする付記12から付記15のいずれかに記載の受信装置。
前記スループット計測装置と理論値計測用パケットを送受信する理論値用パケット送受信手段
を備えることを特徴とする付記12から付記16のいずれかに記載の受信装置。
付記1から付記11のいずれかに記載のスループット計測装置と
付記12に記載の受信装置と
を備え、
前記データ送信手段は前記データ受信手段へ前記データを送信し、
前記フィードバック受信手段は前記フィードバック送信手段から前記フィードバックを受信する
ことを特徴とするスループット計測システム。
付記3あるいは付記8に記載のスループット計測装置と
付記13に記載の受信装置と
を備え、
前記データ送信手段は前記データ受信手段へ前記データを送信し、
前記フィードバック受信手段は前記フィードバック送信手段から前記フィードバックを受信する
ことを特徴とするスループット計測システム。
付記3に記載のスループット計測装置と
付記14に記載の受信装置と
を備え、
前記データ送信手段は前記データ受信手段へ前記データを送信し、
前記フィードバック受信手段は前記フィードバック送信手段から前記フィードバックを受信する
ことを特徴とするスループット計測システム。
付記4に記載のスループット計測装置と
付記15に記載の受信装置と
を備え、
前記データ送信手段は前記データ受信手段へ前記データを送信し、
前記フィードバック受信手段は前記フィードバック送信手段から前記フィードバックを受信する
ことを特徴とするスループット計測システム。
付記5に記載のスループット計測装置と
付記16に記載の受信装置と
を備え、
前記データ送信手段は前記データ受信手段へ前記データを送信し、
前記フィードバック受信手段は前記フィードバック送信手段から前記フィードバックを受信する
ことを特徴とするスループット計測システム。
付記11に記載のスループット計測装置と
付記17に記載の受信装置と
を備え、
前記データ送信手段は前記データ受信手段へ前記データを送信し、
前記フィードバック受信手段は前記フィードバック送信手段から前記フィードバックを受信し、
前記スループット計測装置の前記理論値用パケット送受信手段は前記受信装置の理論値用パケット送受信手段と前記理論値計測用パケットを送受信する
ことを特徴とするスループット計測システム。
データを受信装置へ送信し、前記受信装置から前記データの受信完了を示すフィードバックを受信し、前記フィードバックと前記データの送信データ量に基づいてスループットが取り得る値の範囲の境界値を算出し、前記スループットの理論値を計測し、前記理論値が前記範囲を外れているとき、前記境界値を出力し、前記理論値が前記範囲に含まれるとき、前記理論値を出力する
ことを特徴とするスループット計測方法。
前記境界値は上限値を含み、
前記スループット計測方法は、前記フィードバックと前記データの送信データ量に基づいて前記上限値を算出し、前記理論値が前記上限値より大きいとき前記上限値を出力する
ことを特徴とする付記24に記載のスループット計測方法。
前記フィードバックは、前記受信装置が前記データを受信した際の受信開始時刻および受信完了時刻を含み、
前記スループット計測方法は、前記受信開始時刻から前記受信完了時刻までの受信経過時間と前記送信データ量に基づいて前記上限値を算出する
ことを特徴とする付記25に記載のスループット計測方法。
前記フィードバックは、前記受信装置が前記データを受信した際の受信開始時刻から受信完了時刻までの受信経過時間を含み、
前記スループット計測方法は、前記受信経過時間および前記送信データ量に基づいて前記上限値を算出する
ことを特徴とする付記25に記載のスループット計測方法。
前記フィードバックは、前記受信装置が前記データを受信した際の受信データ量を含み、
前記スループット計測方法は、前記送信データ量の代わりに前記受信データ量に基づいて前記上限値を算出する
ことを特徴とする付記25から付記27のいずれかに記載のスループット計測方法。
前記境界値は下限値を含み、
前記スループット計測方法は、前記データの送信を開始した送信開始時刻、送信完了時刻および前記送信データ量に基づき前記スループットの下限値を算出し、前記理論値が前記下限値より小さいとき前記下限値を出力する
ことを特徴とする付記24から付記28のいずれかに記載のスループット計測方法。
前記送信完了時刻は、前記フィードバックを受信したフィードバック受信時刻である
ことを特徴とする付記29に記載のスループット計測方法。
前記フィードバックは、前記受信装置が前記データの受信を完了した受信完了時刻を含み、
前記送信完了時刻は、前記受信完了時刻である
ことを特徴とする付記29に記載のスループット計測方法。
前記理論値計測部は、RTT(Round Trip Time)とパケットロス率により前記理論値を計測する
ことを特徴とする付記24から付記31のいずれかに記載のスループット計測方法。
前記送信部は前記データをTCP(Transmission Control Protocol)で送信する
ことを特徴とする付記24から付記32のいずれかに記載のスループット計測方法。
前記受信装置と理論値計測用パケットを送受信する
ことを特徴とする付記24から付記33のいずれかに記載のスループット計測方法。
スループット計測装置からデータを受信するデータ受信部と、
前記データの受信完了を検出する計測部と、
前記受信完了後、前記受信完了を示すフィードバックを前記スループット計測装置へ送信するフィードバック送信部と、
を備えることを特徴とする受信方法。
前記受信方法は、前記データの受信完了時刻を計測し、
前記フィードバックは、前記受信完了時刻を含む
ことを特徴とする付記35に記載の受信方法。
前記受信方法は、前記データの受信開始時刻を計測し、
前記フィードバックは、前記受信開始時刻を含む
ことを特徴とする付記36に記載の受信方法。
前記受信方法は、前記データの受信開始時刻と受信完了時刻を計測して受信経過時間を算出し、
前記フィードバックは、前記受信経過時間を含む
ことを特徴とする付記35あるいは付記36に記載の受信方法。
前記受信方法は、前記データの受信データ量を計測し、
前記フィードバックは、前記受信データ量を含む
ことを特徴とする付記35から付記38のいずれかに記載の受信方法。
前記スループット計測装置と理論値計測用パケットを送受信する
ことを特徴とする付記35から付記39のいずれかに記載の受信方法。
コンピュータに、
データを受信装置へ送信するデータ送信機能と、
前記受信装置から前記データの受信完了を示すフィードバックを受信するフィードバック受信機能と、
前記フィードバックと前記データの送信データ量に基づいてスループットが取り得る値の範囲の境界値を算出する境界値算出機能と、
前記スループットの理論値を計測する理論値計測機能と、
前記理論値が前記範囲を外れているとき、前記境界値を出力し、前記理論値が前記範囲に含まれるとき、前記理論値を出力する出力機能と
を実現させることを特徴とするスループット計測プログラム。
前記境界値は上限値を含み、
前記境界値算出機能は、前記フィードバックと前記データの送信データ量に基づいて前記上限値を算出し、
前記出力機能は、前記理論値が前記上限値より大きいとき前記上限値を出力する
ことを特徴とする付記41に記載のスループット計測プログラム。
前記フィードバックは、前記受信装置が前記データを受信した際の受信開始時刻および受信完了時刻を含み、
前記境界値算出機能は、前記受信開始時刻から前記受信完了時刻までの受信経過時間と前記送信データ量に基づいて前記上限値を算出する
ことを特徴とする付記42に記載のスループット計測プログラム。
前記フィードバックは、前記受信装置が前記データを受信した際の受信開始時刻から受信完了時刻までの受信経過時間を含み、
前記境界値算出機能は、前記受信経過時間および前記送信データ量に基づいて前記上限値を算出する
ことを特徴とする付記42に記載のスループット計測プログラム。
前記フィードバックは、前記受信装置が前記データを受信した際の受信データ量を含み、
前記境界値算出機能は、前記送信データ量の代わりに前記受信データ量に基づいて前記上限値を算出する
ことを特徴とする付記42から付記44のいずれかに記載のスループット計測プログラム。
前記境界値は下限値を含み、
前記境界値算出機能は、前記データの送信を開始した送信開始時刻、送信完了時刻および前記送信データ量に基づき前記スループットの下限値を算出し、
前記出力機能は、前記理論値が前記下限値より小さいとき前記下限値を出力する
ことを特徴とする付記41から付記45のいずれかに記載のスループット計測プログラム。
前記送信完了時刻は、前記フィードバックを受信したフィードバック受信時刻である
ことを特徴とする付記46に記載のスループット計測プログラム。
前記フィードバックは、前記受信装置が前記データの受信を完了した受信完了時刻を含み、
前記送信完了時刻は、前記受信完了時刻である
ことを特徴とする付記46に記載のスループット計測プログラム。
前記理論値計測機能は、RTT(Round Trip Time)とパケットロス率により前記理論値を計測する
ことを特徴とする付記41から付記8のいずれかに記載のスループット計測プログラム。
前記送信機能は前記データをTCP(Transmission Control Protocol)で送信する
ことを特徴とする付記41から付記49のいずれかに記載のスループット計測プログラム。
前記理論値計測機能は前記受信装置と理論値計測用パケットを送受信する
ことを特徴とする付記41から付記50のいずれかに記載のスループット計測プログラム。
コンピュータに、
スループット計測装置からデータを受信するデータ受信機能と、
前記データの受信完了を検出する計測機能と、
前記受信完了後、前記受信完了を示すフィードバックを前記スループット計測装置へ送信するフィードバック送信機能と、
を実現させることを特徴とする受信プログラム。
前記計測機能は、前記データの受信完了時刻を計測し、
前記フィードバックは、前記受信完了時刻を含む
ことを特徴とする付記52に記載の受信プログラム。
前記計測機能は、前記データの受信開始時刻を計測し、
前記フィードバックは、前記受信開始時刻を含む
ことを特徴とする付記53に記載の受信プログラム。
前記計測機能は、前記データの受信開始時刻と受信完了時刻を計測して受信経過時間を算出し、
前記フィードバックは、前記受信経過時間を含む
ことを特徴とする付記52あるいは付記53に記載の受信プログラム。
前記計測機能は、前記データの受信データ量を計測し、
前記フィードバックは、前記受信データ量を含む
ことを特徴とする付記52から付記55のいずれかに記載の受信プログラム。
前記スループット計測装置と理論値計測用パケットを送受信する理論値用パケット送受信機能
を前記コンピュータに実現させることを特徴とする付記52から付記56のいずれかに記載の受信プログラム。
付記41から付記51のいずれかに記載のスループット計測プログラムを記録した、コンピュータ読み取り可能な記録媒体。
付記52から付記57のいずれかに記載の受信プログラムを記録した、コンピュータ読み取り可能な記録媒体。
11 データ送信部
12 フィードバック受信部
13 境界値算出部
14 理論値計測部
141 理論値用パケット送受信部
142 ロス率計測部
143 RTT計測部
144 計算部
15 出力部
40、50 受信装置
41 データ受信部
42 計測部
43 フィードバック送信部
54 理論値用パケット送受信部
70 情報処理装置
71 通信インタフェース
72 入出力インタフェース
73 演算装置
74 記憶装置
75 不揮発性記憶装置
76 ドライブ装置
77 記録媒体
Claims (10)
- データを受信装置へ送信するデータ送信手段と、
前記受信装置から前記データの受信完了を示すフィードバックを受信するフィードバック受信手段と、
前記フィードバックと前記データの送信データ量に基づいてスループットが取り得る値の範囲の境界値を算出する境界値算出手段と、
前記スループットの理論値を計測する理論値計測手段と、
前記理論値が前記範囲を外れているとき、前記境界値を出力し、前記理論値が前記範囲に含まれるとき、前記理論値を出力する出力手段と
を備えることを特徴とするスループット計測装置。 - 前記境界値は上限値を含み、
前記境界値算出手段は、前記フィードバックと前記データの送信データ量に基づいて前記上限値を算出し、
前記出力手段は、前記理論値が前記上限値より大きいとき前記上限値を出力する
ことを特徴とする請求項1に記載のスループット計測装置。 - 前記フィードバックは、前記受信装置が前記データを受信した際の受信開始時刻および受信完了時刻を含み、
前記境界値算出手段は、前記受信開始時刻から前記受信完了時刻までの受信経過時間と前記送信データ量に基づいて前記上限値を算出する
ことを特徴とする請求項2に記載のスループット計測装置。 - 前記境界値は下限値を含み、
前記境界値算出手段は、前記データの送信を開始した送信開始時刻、送信完了時刻および前記送信データ量に基づき前記スループットの下限値を算出し、
前記出力手段は、前記理論値が前記下限値より小さいとき前記下限値を出力する
ことを特徴とする請求項1から請求項3のいずれかに記載のスループット計測装置。 - 前記送信完了時刻は、前記フィードバックを受信したフィードバック受信時刻である
ことを特徴とする請求項4に記載のスループット計測装置。 - 前記フィードバックは、前記受信装置が前記データの受信を完了した受信完了時刻を含み、
前記送信完了時刻は、前記受信完了時刻である
ことを特徴とする請求項4に記載のスループット計測装置。 - 前記理論値計測手段は前記受信装置と理論値計測用パケットを送受信する
ことを特徴とする請求項1から請求項6のいずれかに記載のスループット計測装置。 - 請求項1から請求項7のいずれかに記載のスループット計測装置と、
スループット計測装置からデータを受信するデータ受信手段と、
前記データの受信完了を検出する計測手段と、
前記受信完了後、前記受信完了を示すフィードバックを前記スループット計測装置へ送信するフィードバック送信手段と、
を備える受信装置
を備え、
前記データ送信手段は前記データ受信手段へ前記データを送信し、
前記フィードバック受信手段は前記フィードバック送信手段から前記フィードバックを受信する
ことを特徴とするスループット計測システム。 - データを受信装置へ送信し、前記受信装置から前記データの受信完了を示すフィードバックを受信し、前記フィードバックと前記データの送信データ量に基づいてスループットが取り得る値の範囲の境界値を算出し、前記スループットの理論値を計測し、前記理論値が前記範囲を外れているとき、前記境界値を出力し、前記理論値が前記範囲に含まれるとき、前記理論値を出力する
ことを特徴とするスループット計測方法。 - コンピュータに、
データを受信装置へ送信するデータ送信機能と、
前記受信装置から前記データの受信完了を示すフィードバックを受信するフィードバック受信機能と、
前記フィードバックと前記データの送信データ量に基づいてスループットが取り得る値の範囲の境界値を算出する境界値算出機能と、
前記スループットの理論値を計測する理論値計測機能と、
前記理論値が前記範囲を外れているとき、前記境界値を出力し、前記理論値が前記範囲に含まれるとき、前記理論値を出力する出力機能と
を実現させることを特徴とするスループット計測プログラムを記録した、コンピュータ読み取り可能な記録媒体。
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