JP5454318B2 - Band measuring device, band measuring system, band measuring program and communication device - Google Patents

Description

  The present invention relates to a bandwidth measuring device, a bandwidth measuring system, a bandwidth measuring program, and a communication device.

  2. Description of the Related Art Conventionally, in a communication line via the Internet, as one aspect, there is a full-duplex line that secures a band independently in both directions of uplink and downlink. In such a full-duplex line, bi-directional and independent bandwidth control itself becomes a factor of cost increase. Therefore, in a communication line via the Internet, as another aspect, a VPN (Virtual Private Network) router apparatus that shares a bidirectional bandwidth between upstream and downstream is used.

  By the way, in the recent Internet, network virtualization is progressing at various layers. In particular, the above router device has a problem of complicated processing and high load. In communication via the Internet, communication is performed via various devices, so the communication status changes depending on the bandwidth of the route on the route, the load on any device, and the like.

  In the first place, in order to realize efficient communication on the Internet, it is preferable that an end host device used by an end user recognizes the nature of the network and performs appropriate transmission bandwidth control. However, it is difficult for the end host device to directly acquire the traffic status from a router device or the like installed in the middle of the route because of the nature of the Internet constituted by the above-described various interconnections. For this reason, recently, there is a technique in which an end host device measures a transferable bandwidth at a bottleneck point on a path by mutual communication with another end host device.

JP 2002-152205 A

  However, the conventional technique has a problem of causing congestion on a communication path via the Internet. Specifically, in the prior art, since the bandwidth is measured independently for each one-way traffic between end host devices, it is detected whether or not the measured transferable bandwidth is the sum of both directions. Is difficult.

  For example, in the VPN router device described above, the transferable bandwidth may not satisfy the line bandwidth depending on performance constraints, and high-load encryption and decryption are shared by bidirectional processing. , One traffic affects the forwarding performance of the other traffic. In other words, when using such a device and determining the band to be used by measuring the band independently for each direction, the total used band of bidirectional traffic exceeds the transferable band. It becomes a factor that a loss occurs. As a result of packet loss, congestion is caused in the prior art.

  Therefore, the technology disclosed in the present application has been made in view of the above, and a bandwidth measuring device, a bandwidth measuring system, a bandwidth measuring program, and a bandwidth measuring program capable of preventing congestion on a communication path via the Internet, and An object is to provide a communication device.

  In order to solve the above-described problems and achieve the object, the bandwidth measuring device disclosed in the present application includes a first setting unit that sets the size of a probe packet and a response packet to the probe packet to a predetermined value. In addition, the bandwidth measuring device increases the transmission bandwidth value until the packet loss occurs with the size of the probe packet and the response packet set by the first setting unit, and sends the probe packet to the response device that transmits the response packet. It has the 1st transmission part which transmits. Further, the bandwidth measuring device has a second setting unit that sets the size of the response packet to a value smaller than a predetermined value. In addition, the bandwidth measuring device has a size of the probe packet set by the first setting unit and the response packet set by the second setting unit, and when a packet loss occurs due to the transmission of the probe packet by the first transmission unit. The second transmission unit transmits the probe packet to the response device while further increasing the transmission band value until a packet loss occurs from the transmission band value.

  One aspect of the bandwidth measuring device, the bandwidth measuring system, the bandwidth measuring program, and the communication device disclosed in the present application has an effect that congestion on a communication path via the Internet can be prevented.

FIG. 1 is a diagram illustrating a configuration example of a bandwidth measuring apparatus according to the first embodiment. FIG. 2 is a diagram illustrating a configuration example of a network including a band measuring device. FIG. 3 is a diagram illustrating a configuration example of a bandwidth measuring apparatus according to the second embodiment. FIG. 4 is a diagram illustrating an example of information held in the setting information. FIG. 5 is a diagram illustrating an example of information held in the measurement information. FIG. 6 is a diagram illustrating a format of a probe packet using an ICMP Echo message. FIG. 7 is a diagram showing the format of a response packet using the ICMP Echo Reply message. FIG. 8 is a diagram showing a format of a probe packet using UDP. FIG. 9 is a diagram illustrating a format of a response packet using UDP. FIG. 10 is a flowchart illustrating an example of the bandwidth measurement process according to the second embodiment. FIG. 11 is a diagram illustrating an example of a band measurement pattern when the bands are independent in both directions. FIG. 12 is a diagram illustrating an example of a band measurement pattern when a band is shared in both directions. FIG. 13 is a diagram illustrating a network configuration example when the bandwidth measuring device is divided into a request side and a response side. FIG. 14 is a diagram illustrating a configuration example of a request side bandwidth measuring apparatus. FIG. 15 is a diagram illustrating a configuration example of a response-side band measurement device. FIG. 16 is a diagram illustrating an example of a computer that executes a bandwidth measurement program.

  Embodiments of a bandwidth measuring device, a bandwidth measuring system, a bandwidth measuring program, and a communication device disclosed in the present application will be described below with reference to the accompanying drawings. In addition, this invention is not limited by the following examples. In addition, the embodiments can be appropriately combined within a range that does not contradict the contents.

  A configuration example of the bandwidth measuring apparatus according to the first embodiment will be described with reference to FIG. FIG. 1 is a diagram illustrating a configuration example of a bandwidth measuring apparatus according to the first embodiment. For example, as illustrated in FIG. 1, the bandwidth measuring apparatus 1 includes a first setting unit 2, a first transmission unit 3, a second setting unit 4, and a second transmission unit 5. The bandwidth measuring device 1 is a device connected to an end host device that performs communication via, for example, a router device or the Internet, and measures a transmission bandwidth between the end host devices.

  In the above configuration, the first setting unit 2 sets the probe packet and the size of the response packet to the probe packet to a predetermined value. The first transmission unit 3 increases the transmission band value until the packet loss occurs with the size of the probe packet and the response packet set by the first setting unit 2, and transmits the response packet to the response device that transmits the response packet. Send.

  The second setting unit 4 sets the response packet size to a value smaller than a predetermined value. The second transmission unit 5 transmits the probe packet to the response device with the probe packet set by the first setting unit 2 and the size of the response packet set by the second setting unit 4. In the transmission of the probe packet, the second transmission unit 5 increases the transmission band value from the transmission band value when the packet loss occurs in the transmission of the probe packet by the first transmission unit 3 until the packet loss occurs, A probe packet is transmitted.

  Note that the bandwidth measuring device 1 notifies the desired device as a measurement result of the transmission bandwidth value when the packet loss obtained by the above processing occurs, or the bandwidth that can be transferred from the transmission bandwidth value is independent in both directions. Or whether it is shared in both directions. In other words, a desired device that obtains the measurement result or determination result from the band measuring device 1 can be controlled to a suitable transmission band.

  In this way, the bandwidth measuring apparatus 1 outputs a transmission bandwidth value for determining whether the bandwidth that can be transferred in the network is independent in both directions or shared in both directions, as a measurement result. As a result, the bandwidth measuring device 1 can prevent congestion on the communication path via the Internet, as compared with the conventional technology that measures the bandwidth independently for each one-way traffic in the network.

[Network configuration]
The configuration of the network including the bandwidth measuring device will be described with reference to FIG. FIG. 2 is a diagram illustrating a configuration example of a network including a band measuring device. For example, as shown in FIG. 2, the network includes a bandwidth measuring device 1000, an end host device 2000, a router device 3000, a bandwidth measuring device 1100, an end host device 2100, and a router device 3100. Although FIG. 2 shows a network between two points by two end host devices, the number of points, the number of each device, and the like are not limited to this.

  As the network port, for example, an arbitrary link layer protocol capable of transmitting and receiving IP (Internet Protocol) packets such as Ethernet (registered trademark) is used. The bandwidth measuring apparatus 1000 and the bandwidth measuring apparatus 1100 transmit and receive packets to and from the network using an arbitrary link layer protocol. The end host device is a communication device such as a PC (Personal Computer) or a server device.

  The bandwidth measuring device 1000, the end host device 2000, and the router device 3000 form a LAN (Local Area Network). For connection between the bandwidth measuring apparatus 1000 and the end host apparatus 2000, for example, USB (Universal Serial Bus), serial transmission (Serial Transmission), or the like is used. Similarly, the bandwidth measuring device 1100, the end host device 2100, and the router device 3100 form a LAN. The connection between the bandwidth measuring device 1100 and the end host device 2100 similarly uses USB, serial transfer, or the like.

  In the above configuration, the end host device 2000 and the end host device 2100 communicate with each other via the router device 3000, the router device 3100, the Internet, and the like. At this time, the bandwidth measuring device 1000 and the bandwidth measuring device 1100 measure the transmission bandwidth between the end host device 2000 and the end host device 2100. Details of processing by the bandwidth measuring apparatus 1000 and the bandwidth measuring apparatus 1100 will be described later.

[Configuration of Bandwidth Measuring Apparatus According to Second Embodiment]
Next, the configuration of the bandwidth measuring apparatus according to the second embodiment will be described with reference to FIG. FIG. 3 is a diagram illustrating a configuration example of a bandwidth measuring apparatus according to the second embodiment. 3 is an example of the bandwidth measuring device 1, the bandwidth measuring device 1000, the bandwidth measuring device 1100, and the like.

  For example, as shown in FIG. 3, the bandwidth measuring apparatus 100 includes setting information 111 and measurement information 112. In addition, the bandwidth measuring apparatus 100 includes a control communication unit 121, a device control unit 122, a probe packet generation unit 123, a packet transmission unit 124, a packet reception unit 125, a packet determination unit 126, and a response packet generation unit 127. And a packet loss detection unit 128.

  Among these, the setting information 111 and the measurement information 112 are, for example, a semiconductor memory device such as a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory (Flash Memory), or a storage device such as a hard disk or an optical disk. It is. The control communication unit 121 to the packet loss detection unit 128 are integrated circuits such as an ASIC (Application Specific Integrated Circuit) and an FPGA (Field Programmable Gate Array). Alternatively, the control communication unit 121 to the packet loss detection unit 128 are electronic circuits such as a CPU (Central Processing Unit) and an MPU (Micro Processing Unit).

  Here, the information held in the setting information 111 will be described with reference to FIG. FIG. 4 is a diagram illustrating an example of information held in the setting information 111. For example, as illustrated in FIG. 4, the setting information 111 includes a “source address” indicating an end host device to be measured and a “destination address” indicating an end host device that is a communication destination device of the end host device. And hold. In addition, the setting information 111 holds a “next hop address” indicating a router device connected to the Internet and a “route MTU (Maximum Transmission Unit) value” indicating the maximum value of data that can be transmitted at one time. . Note that the setting information 111 holds the above various types of information in association with “index”.

  As an example of information held in the setting information 111, the setting information 111 includes “index: 1”, “source address: 192.0.10.1”, and “destination address: 192.0.2”. .20 ”in association with each other. In addition, the setting information 111 holds “index: 1”, “next hop address: 192.0.1.1”, and “route MTU value: 1500 B (Byte)” in association with each other.

  In addition, information held in the measurement information 112 will be described with reference to FIG. FIG. 5 is a diagram illustrating an example of information held in the measurement information 112. For example, as shown in FIG. 5, the measurement information 112 includes a “measurement state” indicating a time series of band measurement, and “transmission band value 1” and “transmission band value 2” indicating transmission bands at the time of band measurement. Hold. In addition, the measurement information 112 includes a “probe size setting value” indicating the size of the probe packet transmitted for bandwidth measurement, and a “response size” indicating the size of the response packet requested to the transmission destination apparatus with respect to the probe packet. "Required value" is held. In addition, the measurement information 112 holds a “sequence number” and a “packet loss rate”. Note that the measurement information 112 holds the above various types of information in association with “index”.

  As an example of information held in the measurement information 112, the measurement information 112 includes “index: 2”, “measurement state: phase 2”, “transmission band value 1: 5 Mbps”, and “transmission band value 2”. : 5 Mpbs ”in association with each other. In addition, the measurement information 112 holds “probe size setting value: 1480B”, “response size request value: 26B”, “sequence number: 4000”, and “packet loss rate: 1%” in association with each other. To do.

  Returning to the description of FIG. 3, the control communication unit 121 controls, for example, communication with the end host device performed via the control communication port. In communication with the end host device, the control communication unit 121 sets the setting information 111 based on a control signal from the end host device. The control signal from the end host device includes, for example, “source address”, “destination address”, “next hop address”, and “route MTU value”.

  For example, the device control unit 122 controls the entire band measurement device 100. Specifically, the device control unit 122 secures an entry of the measurement information 112 and performs initialization, and sets the index value of the setting information 111 as the index of the measurement information 112. Then, the device control unit 122 sets the “probe size setting value” of the measurement information 112 so that the size of the probe packet becomes the maximum reachable value according to the “route MTU value” held in the setting information 111. The maximum value at which the probe packet size can be reached is, for example, a value obtained by subtracting about 20 B from the “route MTU value” that is the maximum value of data. The value to be subtracted will be described later.

  Similarly, the device control unit 122 sets the “response size request value” of the measurement information 112 so that the size of the response packet becomes the maximum reachable value. Subsequently, the apparatus control unit 122 sets a sufficiently small value as the initial value for the “transmission band value 1” of the measurement information 112 and changes the measurement state to “measurement state: phase 1”. Note that the initial value set to “transmission band value 1” is preferably equal to or less than a quarter of the maximum transmission band value.

  The probe packet generator 123 performs, for example, probe packet generation processing. Specifically, based on the measurement information 112, the probe packet generation unit 123 generates a probe packet with a transmission rate corresponding to “transmission band value 1” and a size set to “probe size setting value”. Further, the probe packet generator 123 adds information requesting a response packet with the size set in the “sequence number” and the “response size request value” to the probe packet.

  For example, the packet transmission unit 124 transmits the probe packet generated by the probe packet generation unit 123 via the network port. Further, the packet transmission unit 124 transmits, for example, the response packet generated by the response packet generation unit 127 via the network port. As a protocol of the probe packet and the response packet, IPv4 (Internet Protocol version 4), ICMP (Internet Control Message Protocol), or the like is used as one aspect. In addition, the protocol of the probe packet and the response packet uses IPv6 as an alternative to IPv4 and UDP (User Datagram Protocol) as an alternative to ICMP, as another aspect.

  Here, the format of the probe packet using the ICMP Echo message will be described with reference to FIG. FIG. 6 is a diagram illustrating a format of a probe packet using an ICMP Echo message.

  For example, as shown in FIG. 6, the Echo message of the probe packet includes “type (8)” indicating a request notification of a response packet, “code (1)” indicating a mode for measuring a bandwidth, “ Checksum ". In addition, the Echo message has a “response size” and a “sequence number” added as described above. It should be noted that any content may be stored in the “data” area of the Echo message. The size of the “data” is, for example, a size obtained by subtracting the size of the ICMP header from the size of the probe packet.

  Next, the format of a response packet using an ICMP Echo Reply message will be described with reference to FIG. FIG. 7 is a diagram showing the format of a response packet using the ICMP Echo Reply message.

  For example, as shown in FIG. 7, the Echo Reply message of the response packet includes “type (0)” indicating the notification of the response packet, “code (1)” indicating the band measurement mode, “ Checksum ". In addition, the Echo Reply message has a “response size” and a “sequence number” added as described above. It should be noted that any content may be stored in the “data” area of the Echo Reply message. The size of such “data” is, for example, a size obtained by subtracting the size of the ICMP header from the size of the response packet.

  Next, a probe packet format using UDP will be described with reference to FIG. FIG. 8 is a diagram showing a format of a probe packet using UDP.

  For example, as shown in FIG. 8, a probe packet using UDP has a “transmission source port” indicating the transmission source of the probe packet, a “destination port” indicating the transmission destination of the probe packet, and the entire size of the data. It has a “data size” and a “checksum”. In addition, the probe packet using UDP has “response size” and “sequence number” added as described above. Note that the “data” size of the probe packet using UDP is, for example, a size obtained by subtracting the size of the UDP header from the size of the probe packet.

  Next, the format of a response packet using UDP will be described with reference to FIG. FIG. 9 is a diagram illustrating a format of a response packet using UDP.

  For example, as shown in FIG. 9, a response packet using UDP includes a “transmission source port” indicating the transmission source of the response packet, a “destination port” indicating the transmission destination of the response packet, and the overall size of the data. It has a “data size” and a “checksum”. In addition, a response packet using UDP has a “response size” and a “sequence number” added as described above. The size of “data” included in the response packet using UDP is, for example, a size obtained by subtracting the size of the UDP header from the size of the response packet.

  Returning to the description of FIG. 3, the packet receiving unit 125 receives a probe packet or a response packet via, for example, a network port. For example, the packet determination unit 126 determines whether the packet received by the packet reception unit 125 is a probe packet or a response packet. Then, when the received packet is a probe packet, the packet determination unit 126 outputs the probe packet to the response packet generation unit 127. On the other hand, when the received packet is a response packet, the packet determination unit 126 outputs the response packet to the packet loss detection unit 128.

  For example, the response packet generation unit 127 acquires the “source address” and the “response size request value” from the field of the probe packet output by the packet determination unit 126. Then, the response packet generation unit 127 generates a response packet having a size corresponding to the “response size request value” based on the setting information 111 and transmits the response packet to the “transmission source address” to the packet transmission unit 124. Output.

  The packet loss detection unit 128, for example, inspects the missing “sequence number” from the field of the response packet output by the packet determination unit 126, and detects the packet loss. Then, the packet loss detection unit 128 performs statistical processing on the number of detected packet losses, and stores it as the packet loss rate in the measurement information 112.

  Regarding the above processing, the bandwidth measuring apparatus 100 transmits the probe packet while increasing the “transmission bandwidth value 1” until the packet loss rate exceeds the threshold. Thereafter, the device control unit 122 sets the “response size request value” of the measurement information 112 so that the size of the response packet becomes the minimum reachable value when the packet loss rate exceeds a predetermined threshold.

  Subsequently, the apparatus control unit 122 sets “transmission band value 1” of the measurement information 112 to “transmission band value 2”, and transitions the measurement state to “measurement state: phase 2”. That is, the bandwidth measuring apparatus 100 transmits a probe packet while further increasing the transmission rate from “transmission bandwidth value 1” which is a transmission bandwidth value when packet loss occurs, and performs processing when the packet loss rate exceeds a threshold value. Exit. After the above process is completed, the bandwidth measuring device 100 transmits information including “transmission bandwidth value 1” and “transmission bandwidth value 2” held in the measurement information 112 to the end host device as control signals. To do.

[Bandwidth Measurement Processing According to Second Embodiment]
Next, band measurement processing according to the second embodiment will be described with reference to FIG. FIG. 10 is a flowchart illustrating an example of the bandwidth measurement process according to the second embodiment. In FIG. 10, processing after the setting information 111 is set by the control communication unit 121 will be described.

  For example, as illustrated in FIG. 10, the apparatus control unit 122 secures and initializes the entry of the measurement information 112, and sets the index value of the setting information 111 as the index of the measurement information 112 (step S101). Then, the device control unit 122 sets the probe packet size of the measurement information 112 to the maximum value in accordance with the “route MTU value” of the setting information 111 (step S102). Similarly, the device control unit 122 sets the response packet size of the measurement information 112 to the maximum value (step S103).

  Subsequently, the apparatus control unit 122 sets a sufficiently small value as “initial value” for “transmission band value 1” of the measurement information 112 (step S104), and transitions the measurement state to “measurement state: phase 1” (step S105). ). Thereafter, based on the measurement information 112, the probe packet generator 123 generates a probe packet with a transmission rate corresponding to “transmission band value 1” and a size set to “probe size setting value”. At this time, the probe packet generator 123 adds information requesting a response packet with the size set in the “sequence number” and the “response size request value” to the probe packet. Then, the packet transmitter 124 transmits the probe packet generated by the probe packet generator 123 to the destination address (step S106).

  Further, the bandwidth measuring apparatus that has received the probe packet acquires the “source address” and the “response size request value” from the probe packet, and sends the response packet having a size corresponding to the “response size request value” to the source. Send to address.

  Subsequently, the packet loss detection unit 128 determines whether or not the packet loss rate exceeds the threshold based on the response packet received by the packet reception unit 125 (step S107). Thereafter, when the packet loss rate does not exceed the threshold (No at Step S107), the packet loss detection unit 128 increases the “transmission band value 1” (Step S108), and executes the process of Step S106 again.

  On the other hand, when the packet loss detection unit 128 determines that the packet loss rate has exceeded the threshold (Yes at Step S107), the device control unit 122 sets the size of the response packet of the measurement information 112 to the minimum value (Step S107). S109). Then, the device control unit 122 sets “transmission band value 1” when packet loss occurs in “transmission band value 2” of the measurement information 112 (step S110), and sets the measurement state to “measurement state: phase 2”. "(Step S111).

  Subsequently, based on the measurement information 112, the probe packet generation unit 123 generates a probe packet with a transmission rate corresponding to “transmission band value 2” and a size set to “probe size setting value”. At this time, the probe packet generator 123 adds information requesting a response packet with the size set in the “sequence number” and the “response size request value” to the probe packet. Thereafter, the packet transmitter 124 transmits the probe packet generated by the probe packet generator 123 to the transmission destination address (step S112).

  Further, the bandwidth measuring apparatus that has received the probe packet acquires the “source address” and the “response size request value” from the probe packet, and sends the response packet having a size corresponding to the “response size request value” to the source. Send to address.

  Then, the packet loss detection unit 128 determines whether or not the packet loss rate exceeds the threshold based on the response packet received by the packet reception unit 125 (step S113). Subsequently, when the packet loss rate does not exceed the threshold (No at Step S113), the packet loss detection unit 128 increases the “transmission band value 2” (Step S114), and executes the process at Step S112 again. . On the other hand, when the packet loss detection unit 128 determines that the packet loss rate exceeds the threshold (Yes in step S113), the packet loss detection unit 128 ends the process.

  The bandwidth measuring apparatus 100 that has executed the bandwidth measuring process notifies the end host device of “transmission bandwidth value 1” and “transmission bandwidth value 2” when packet loss obtained as a measurement result occurs. Whether the end host device that is notified of the measurement result is independent of the bandwidth in both directions, or is sharing the bandwidth in both directions, regarding the status of the bottleneck point on the communication path with the communication destination end host device Determine. When the end host device detects that the bottleneck point shares a transferable bandwidth in both directions, the end host device can perform suitable transmission bandwidth control by the end host device.

[Measured bandwidth pattern]
Next, the measured band pattern will be described with reference to FIGS. 11 and 12. FIG. 11 is a diagram illustrating an example of a band measurement pattern when the bands are independent in both directions. FIG. 12 is a diagram illustrating an example of a band measurement pattern when a band is shared in both directions. In FIGS. 11 and 12, the vertical axis represents “transmission band” and the horizontal axis represents “phase”.

  For example, as shown in FIG. 11, when the bands are independent in both directions, “transmission band value 2” is substantially equal to “transmission band value 1”. 11A shows detection of packet loss, and FIG. 11B shows that packet loss continues.

  For example, as shown in FIG. 12, when a band is shared in both directions, “transmission band value 2” is larger than “transmission band value 1”. Also, (C) and (D) of FIG. 12 show detection of packet loss. The “transmission band value 2” can be used as an approximate value of a transferable band.

[Effects of Example 2]
As described above, the bandwidth measuring apparatus 100 outputs information for detecting that a transferable bandwidth is shared bidirectionally at a bottleneck point in communication via the Internet. As a result, the bandwidth measuring device 100 provides information for implementing a suitable transmission bandwidth control by the end host device, so that congestion on a communication path via the Internet can be prevented.

  Although the embodiments of the band measuring device disclosed in the present application have been described so far, the present invention may be implemented in various different forms other than the embodiments described above. Therefore, different embodiments will be described in (1) the role of the band measuring device, (2) band determination, (3) device configuration, and (4) program.

(1) Role of Bandwidth Measuring Device In the above embodiment, a case has been described where a plurality of bandwidth measuring devices having the same function are provided in the network. Anyway. Therefore, in the following, a case will be described in which the bandwidth measuring device is divided into roles on the packet requesting side and the response side.

  The configuration of the network when the bandwidth measuring device is divided into the request side and the response side will be described with reference to FIG. FIG. 13 is a diagram illustrating a network configuration example when the bandwidth measuring device is divided into a request side and a response side. In the following, for each device shown in FIG. 13, those having the same functions as those in FIG. 2 are denoted by the same reference numerals, and description thereof is omitted.

  For example, as illustrated in FIG. 13, the network includes a request side bandwidth measuring device 1000 a, an end host device 2000, a router device 3000, a response side bandwidth measuring device 1100b, an end host device 2100, and a router device 3100. Although FIG. 13 shows a network between two points by two end host devices, the number of points is not limited to this.

  In the above configuration, the request side bandwidth measuring device 1000a and the response side bandwidth measuring device 1100b measure the transmission bandwidth between the end host device 2000 and the end host device 2100. Details of processing by the request side bandwidth measuring apparatus 1000a and the response side bandwidth measuring apparatus 1100b will be described later.

  Next, the configuration of the request side bandwidth measuring apparatus will be described with reference to FIG. FIG. 14 is a diagram illustrating a configuration example of a request side bandwidth measuring apparatus. Note that the request side bandwidth measuring apparatus 100a shown in FIG. 14 is an example of the request side bandwidth measuring apparatus 1000a. In FIG. 14, components having the same functions as those of the bandwidth measuring apparatus 100 shown in FIG. 3 are denoted by the same reference numerals, and description thereof is omitted.

  For example, as shown in FIG. 14, the request side bandwidth measuring apparatus 100 a includes setting information 111 and measurement information 112. Further, the request side bandwidth measuring apparatus 100a includes a control communication unit 121, a device control unit 122, a probe packet generation unit 123, a packet transmission unit 124, a packet reception unit 125, and a packet loss detection unit 128.

  That is, the request side bandwidth measuring apparatus 100a requests a response packet in the bandwidth measuring apparatus 100 described above, and performs a process of detecting a packet loss based on the response packet.

  Next, the configuration of the response side band measuring apparatus will be described with reference to FIG. FIG. 15 is a diagram illustrating a configuration example of a response-side band measurement device. Note that the response-side band measuring device 100b illustrated in FIG. 15 is an example of the response-side band measuring device 1100b. In FIG. 15, components having the same functions as those of the bandwidth measuring apparatus 100 shown in FIG.

  For example, as illustrated in FIG. 15, the response-side band measurement device 100 b includes setting information 111 and measurement information 112. The response-side band measuring device 100b includes a control communication unit 121, a device control unit 122, a packet transmission unit 124, a packet reception unit 125, and a response packet generation unit 127.

  That is, the response-side band measuring device 100b performs a process of receiving the probe packet in the band measuring device 100, generating a response packet based on information included in the probe packet, and transmitting the response packet. It is.

(2) Band Determination In the above embodiment, the case where the end host device determines whether the band is independent or shared using the band measurement result measured by the band measuring device 100 has been described. However, it may be determined whether the band is independent or shared and output to the end host device.

(3) Device configuration Information including processing procedures, control procedures, specific names, various data, parameters, and the like shown in the document and drawings (for example, “information included in setting information 111”) About can be changed arbitrarily unless otherwise specified.

  The constituent elements of the illustrated bandwidth measuring apparatus 100 are functionally conceptual, and need not be physically configured as illustrated. In other words, the specific form of distribution / integration of each device is not limited to the one shown in the figure, and all or a part thereof may be functionally or physically distributed or arbitrarily distributed in arbitrary units according to various burdens or usage conditions. Can be integrated. For example, the packet transmission unit 124 and the packet reception unit 125 may be integrated as a “packet transmission / reception processing unit” that transmits probe packets and receives response packets.

  In the above embodiment, the band measuring apparatus 100 when connected to the end host apparatus has been described. However, the function of the band measuring apparatus 100 may be incorporated in the end host apparatus.

(4) Program In the above embodiment, the case where various processes are realized by hardware logic has been described. However, it may be realized by executing a program prepared in advance by a computer. Therefore, in the following, an example of a computer that executes a bandwidth measurement program having the same function as that of the bandwidth measurement apparatus 1 shown in the above embodiment will be described with reference to FIG. FIG. 16 is a diagram illustrating an example of a computer that executes a bandwidth measurement program.

  As shown in FIG. 16, the computer 11 as the bandwidth measuring device 1 includes an HDD 13, a CPU 14, a ROM 15, a RAM 16, and the like connected by a bus 18.

  The ROM 15 stores in advance a bandwidth measurement program that exhibits the same function as the bandwidth measurement device 1 shown in the above embodiment. That is, as shown in FIG. 16, the ROM 15 stores in advance a first setting program 15a, a first transmission program 15b, a second setting program 15c, and a second transmission program 15d. Note that these programs 15a to 15d may be appropriately integrated or distributed in the same manner as each component of the bandwidth measuring apparatus 1 shown in FIG.

  Then, the CPU 14 reads these programs 15a to 15d from the ROM 15 and executes them. Accordingly, as illustrated in FIG. 16, the programs 15a to 15d function as a first setting process 14a, a first transmission process 14b, a second setting process 14c, and a second transmission process 14d. The processes 14a to 14d correspond to the first setting unit 2, the first transmission unit 3, the second setting unit 4, and the second transmission unit 5 illustrated in FIG. Then, the CPU 14 executes a bandwidth measurement program based on the data recorded in the RAM 16.

  Note that the programs 15a to 15d are not necessarily stored in the ROM 15 from the beginning. For example, each program may be stored in a “portable physical medium” such as a flexible disk (FD), a CD-ROM, a DVD disk, a magneto-optical disk, or an IC card inserted into the computer 11. Further, for example, each program may be stored in a “fixed physical medium” such as an HDD provided inside or outside the computer 11. Further, for example, each program may be stored in “another computer (or server)” connected to the computer 11 through a public line, the Internet, a LAN, a WAN, or the like. Then, the computer 11 may read and execute each program from now on.

DESCRIPTION OF SYMBOLS 100 Bandwidth measuring device 111 Setting information 112 Measurement information 121 Control communication part 122 Device control part 123 Probe packet generation part 124 Packet transmission part 125 Packet reception part 126 Packet discrimination | determination part 127 Response packet generation part 128 Packet loss detection part

Claims (6)

A first setting unit that sets a probe packet and a size of a response packet to the probe packet to a predetermined value;
A first transmitter that transmits a probe packet to a response device that transmits the response packet while increasing the transmission band value until a packet loss occurs with the size of the probe packet and the response packet set by the first setting unit When,
A second setting unit for setting the size of the response packet to a value smaller than the predetermined value;
Transmission band value when packet loss occurs in probe packet transmission by the first transmission unit with the size of the probe packet set by the first setting unit and the response packet set by the second setting unit And a second transmitter for transmitting a probe packet to the response device while further increasing the transmission bandwidth value until packet loss occurs. The first setting unit sets the size of the probe packet and the response packet to a maximum value,
The band measuring device according to claim 1, wherein the second setting unit sets the size of the response packet to a minimum value.   A communication device connected to the own device based on the transmission band value raised until packet loss occurs by the first transmission unit and the transmission band value raised until packet loss occurs by the second transmission unit; The band measurement device according to claim 1, further comprising a determination unit that determines whether a band is independent or shared in both directions with the communication device connected to the response device. . A bandwidth measurement system comprising: a request side bandwidth measurement device that requests a response packet for a probe packet to be transmitted; and a response side bandwidth measurement device that transmits the response packet,
The request side bandwidth measuring device includes:
A first setting unit that sets a size of the probe packet and the response packet to a predetermined value;
A first transmission unit configured to transmit a probe packet to the response-side band measuring device while increasing a transmission band value until a packet loss occurs with the size of the probe packet and the response packet set by the first setting unit;
A second setting unit for setting the size of the response packet to a value smaller than the predetermined value;
Transmission band value when packet loss occurs in probe packet transmission by the first transmission unit with the size of the probe packet set by the first setting unit and the response packet set by the second setting unit A second transmission unit that transmits a probe packet to the response side bandwidth measuring device while further increasing the transmission bandwidth value until packet loss occurs from
The response side band measuring device is:
A first response packet transmitter that transmits a response packet according to a setting value of a size of a response packet included in the probe packet transmitted by the first transmitter to the request side bandwidth measuring device;
A second response packet transmitter configured to transmit a response packet corresponding to a set value of a size of a response packet included in the probe packet transmitted by the second transmitter to the request side bandwidth measuring device. Bandwidth measurement system. A first setting procedure for setting a probe packet and a size of a response packet to the probe packet to a predetermined value;
A first transmission procedure for transmitting a probe packet to a response device that transmits the response packet while increasing the transmission band value until a packet loss occurs with the size of the probe packet and the response packet set by the first setting procedure When,
A second setting procedure for setting the size of the response packet to a value smaller than the predetermined value;
Transmission band value when packet loss occurs in probe packet transmission by the first transmission procedure with the size of the probe packet set by the first setting procedure and the response packet set by the second setting procedure And a second transmission procedure for transmitting a probe packet to the response device while further increasing the transmission band value until packet loss occurs. A communication device that transmits and receives data to and from a communication destination device.
A first setting unit that sets a probe packet and a size of a response packet to the probe packet to a predetermined value;
A probe packet is transmitted to the communication destination device that transmits the response packet while increasing the transmission bandwidth value until the packet loss occurs with the size of the probe packet and the response packet set by the first setting unit. A transmission unit;
A second setting unit for setting the size of the response packet to a value smaller than the predetermined value;
Transmission band value when packet loss occurs in probe packet transmission by the first transmission unit with the size of the probe packet set by the first setting unit and the response packet set by the second setting unit A second transmission unit for transmitting a probe packet to the communication destination device while further increasing the transmission band value until packet loss occurs from
Based on the transmission band value raised until packet loss occurs by the first transmission unit and the transmission band value raised until packet loss occurs by the second transmission unit, the own device and the communication destination device And a determination unit that determines whether the bandwidth is independent or shared in both directions.

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