WO2011071127A1 - 利用可能帯域計測方法、利用可能帯域計測システム、端末装置及びコンピュータ読み取り可能な記録媒体 - Google Patents
利用可能帯域計測方法、利用可能帯域計測システム、端末装置及びコンピュータ読み取り可能な記録媒体 Download PDFInfo
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- WO2011071127A1 WO2011071127A1 PCT/JP2010/072173 JP2010072173W WO2011071127A1 WO 2011071127 A1 WO2011071127 A1 WO 2011071127A1 JP 2010072173 W JP2010072173 W JP 2010072173W WO 2011071127 A1 WO2011071127 A1 WO 2011071127A1
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- measurement
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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
- H04L43/0882—Utilisation of link capacity
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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
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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
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
Definitions
- the present invention relates to a technique for measuring an available bandwidth of a communication path in a network.
- Non-Patent Document 1 a transmission side terminal transmits a plurality of fixed-size measurement packet sequences to the reception side terminal as one unit, and the reception side terminal detects a change in the reception interval of each measurement packet.
- a method for measuring the available bandwidth has been proposed. In this technique, when the measurement packet sequence is transmitted from the transmission side terminal, the transmission interval of each measurement packet is exponentially decreased. By doing so, the transmission rate of the measurement packet increases exponentially in the measurement packet sequence.
- Patent Document 1 proposes a method for searching for an available bandwidth by repeating the operation of transmitting a measurement packet sequence having a fixed size and an equal transmission interval from the transmission side terminal to the reception side terminal a plurality of times. ing.
- a measurement packet sequence in which the transmission interval is exponentially decreased from the transmission side terminal is transmitted to the reception side terminal.
- Send On the other hand, if the reception side terminal determines that the reception interval is decreasing, the transmission side terminal transmits a measurement packet sequence in which the transmission interval is exponentially increased to the reception side terminal.
- such an operation is repeatedly performed, and the available bandwidth is searched by performing a binary search.
- FIG. 10 shows an example in which the bidirectional usable bandwidth in each communication path is measured serially.
- terminal A transmits a measurement packet sequence to terminal B.
- the terminal B calculates the available bandwidth from the reception status of the measurement packet sequence transmitted from the terminal A, and transmits the calculation result, that is, the measurement result of the available bandwidth, to the terminal A. Thereby, the terminal A can acquire the available bandwidth in the direction from the terminal A to the terminal B.
- each terminal transmits a measurement packet sequence to another terminal based on an instruction from terminal A, and measures the available bandwidth from the reception status of the measurement packet sequence transmitted from the other terminal. And the measurement result is transmitted to terminal A (steps 405 to 422). In this way, terminal A can acquire a bidirectional usable bandwidth in all communication paths.
- FIG. 11 shows an example in which the bidirectional usable bandwidth in each communication path is measured in parallel.
- the terminal A instructs each of the terminals B to D to simultaneously transmit the measurement packet sequence to all the terminals connected to the terminals (step 451).
- Each of the terminals A to D transmits the measurement packet sequence simultaneously to all the connected terminals (step 452).
- Each of the terminals A to D calculates the usable bandwidth of each communication path based on the reception status of the measurement packet sequence received from the other terminals.
- the terminals B to D transmit the measurement result of the available bandwidth in each communication path to the terminal A (step 453).
- bidirectional communication system it is important to accurately measure the bidirectional usable bandwidth for each of a plurality of communication paths.
- a system that performs real-time bidirectional communication such as an IP teleconference by connecting a plurality of terminals on an IP network with a full mesh
- the available bandwidth measurement method includes: Instructing the order of the destination terminal devices to which the measurement packet sequence should be transmitted to each of a plurality of terminal devices connected to each other via a network; Transmitting a measurement packet sequence from each of the plurality of terminal devices to the destination terminal device according to the order; And calculating a usable bandwidth of a route from the transmission source to the transmission destination of the measurement packet sequence based on the reception status of the measurement packet sequence in the terminal device of the transmission destination.
- a terminal device provides: Measurement order instruction means for notifying other terminal devices connected to each other via a network of measurement order information indicating the order of destination terminal devices to which the measurement packet sequence should be transmitted, Measurement order interpreting means for interpreting the order of transmitting the measurement packet sequence to the terminal device of the transmission destination based on the measurement order information set for the own terminal device; Measurement packet transmission means for transmitting the measurement packet sequence to the destination terminal device in the order interpreted by the measurement order interpretation means; And an available bandwidth calculating means for calculating an available bandwidth of a route from the other terminal device to the own terminal device using the measurement packet sequence received from the other terminal device.
- a computer-readable recording medium is provided.
- Measurement order information indicating the order of the destination terminal devices to which the measurement packet sequence is to be transmitted is received, and the terminal device transmits the measurement packet sequence to the destination terminal device based on the received measurement order.
- Processing to interpret the order; A process of transmitting the measurement packet sequence to the destination terminal device in the interpreted order; Using the measurement packet sequence received from another terminal device, and calculating a usable bandwidth of a route from the other terminal device to the terminal device, A program characterized by this is recorded.
- the bidirectional usable bandwidth between a plurality of terminals can be accurately measured in a short time.
- FIG. 7 is a diagram showing the contents of measurement order information corresponding to each of terminal A to terminal D. It is a figure which shows the structure of measurement result information. It is a flowchart which shows the process sequence of a master terminal. It is a flowchart which shows the process sequence of a slave terminal.
- FIG. 2 is a diagram showing a configuration of an available bandwidth measurement system according to an embodiment of the present invention.
- this available bandwidth measuring system is composed of one master terminal (terminal A101) and a plurality of slave terminals (terminal B102, terminal C103 and terminal D104). Are connected to each other.
- terminals (not shown) other than the terminal A101, terminal B102, terminal C103, and terminal D104 may be connected to the network 105, and cross traffic may flow between these terminals (not shown).
- the terminal A101 functioning as a master terminal instructs each slave terminal (terminal B102, terminal C103, and terminal D104) the transmission order of the measurement packet sequence for measuring the available bandwidth, and performs measurement at each slave terminal. Collected available bandwidth.
- Each slave terminal transmits a measurement packet sequence to each terminal (all slave terminals other than the master terminal and its own terminal) in the order instructed by the master terminal.
- each slave terminal transmits the measurement result of the available bandwidth in the communication path with other terminals to the master terminal.
- the terminal A101, the terminal B102, the terminal C103, and the terminal D104 for example, a personal computer, a portable information terminal, a mobile phone, a smartphone, a landline telephone, a street multimedia terminal, an in-vehicle terminal, a TV with a network connection function, and a network connection function
- a set top box, a game machine, a printer with a network connection function, a scanner with a network connection function, or the like can be exemplified.
- the terminal A101, the terminal B102, the terminal C103, and the terminal D104 may be other similar devices having a function of exchanging information with the outside.
- FIG. 3 is a block diagram showing a functional configuration of each terminal.
- the terminal A101 includes a measurement order instruction unit A110, a measurement order interpretation unit A111, a measurement packet transmission unit A112, an available bandwidth calculation unit A113, a transmission / reception unit A114, and a measurement data storage unit A115.
- the terminal B102 includes a measurement order instruction unit B110, a measurement order interpretation unit B111, a measurement packet transmission unit B112, an available bandwidth calculation unit B113, a transmission / reception unit B114, and a measurement data storage unit B115.
- the terminal C103 includes a measurement order instruction unit C110, a measurement order interpretation unit C111, a measurement packet transmission unit C112, an available bandwidth calculation unit C113, a transmission / reception unit C114, and a measurement data storage unit C115.
- the terminal D104 includes a measurement order instruction unit D110, a measurement order interpretation unit D111, a measurement packet transmission unit D112, an available bandwidth calculation unit D113, a transmission / reception unit D114, and a measurement data storage unit D115.
- the measurement order instruction unit A110 instructs each slave terminal (terminal B102, terminal C103, and terminal D104) the order of the destination terminals to which the measurement packet sequence should be transmitted. Specifically, the measurement order instruction unit A110 transmits the measurement order information including the measurement receiving terminal list in which the transmission order of the measurement packet sequence is set to each slave terminal, thereby transmitting the measurement packet sequence transmission destination terminal. Notify the order. In addition, the measurement order instruction unit A110 supplies measurement order information for the own terminal (that is, the terminal A101) to the measurement order interpretation unit A111. Details of the measurement order information will be described later.
- the measurement order interpretation unit A111 (first measurement order interpretation unit) analyzes the measurement order information supplied from the measurement order instruction unit A110, and interprets the order in which the terminal A101 transmits the measurement packet sequence to other terminals.
- Measurement packet transmitter A112 transmits a measurement packet sequence to another terminal.
- the measurement packet for example, an IP (Internet Protocol) packet, a UDP (User Dataram Protocol) packet, an RTP (Real-time Transport Protocol) packet, a TCP (Transmission Control Protocol) packet, or the like can be used.
- the measurement packet may be a packet of a protocol other than these.
- the transmission / reception unit A114 performs transmission of measurement order information, transmission / reception of a measurement packet sequence, reception of information (measurement result information) about a measurement result of an available bandwidth, and the like.
- the measurement data storage unit A115 stores measurement order information and measurement result information.
- the functions of the components of the terminal B102, the terminal C103, and the terminal D104 are the same as the functions of the components of the terminal A101, except for a part. Note that since the measurement order instruction unit (measurement order instruction means) only needs to be provided in the terminal A101 that is the master terminal, the terminal B102, the terminal C103, and the terminal D104 that are the slave terminals respectively include the measurement order instruction unit B110, The measurement order instruction unit C110 and the measurement order instruction unit D110 are not necessarily provided.
- the measurement order interpretation unit B111, the measurement order interpretation unit C111, and the measurement order interpretation unit D111 respectively analyze the received measurement order information from the terminal A101, and the own terminal is another terminal.
- the order in which the measurement packet sequence is transmitted to is interpreted.
- FIG. 4 is a diagram showing the configuration of the measurement order information 120.
- the measurement order information 120 includes an instruction receiving terminal ID 121 and a measurement receiving terminal list.
- the instruction receiving terminal ID 121 indicates an identifier of a terminal that transmits a measurement packet sequence according to the measurement order information 120.
- the measurement receiving terminal list stores an identifier (measurement receiving terminal ID 122) of a partner terminal (measurement receiving terminal) to which the measurement packet sequence is to be transmitted. In other words, the measurement receiving terminal list stores the IDs of terminals other than the own terminal among a plurality of terminals connected to the network.
- the arrangement order of the measurement receiving terminal ID 122 in the measurement receiving terminal list is the transmission order of the measurement packet sequence, that is, the order of the terminals that measure the available bandwidth in the communication path with the terminal (terminal indicated by the instruction receiving terminal ID).
- the measurement reception terminal ID 122 stored in the i-th measurement reception terminal list (i is a natural number equal to or less than N-1 where N is the number of terminals connected to the network) is used to measure the available bandwidth. This represents the ID of the terminal that receives the i th measurement packet sequence.
- the IP address, MAC address, SIP address, telephone number, host name, etc. of the terminal can be used.
- FIG. 5 is a diagram showing four pieces of measurement order information 120 corresponding to the terminals A101, B102, C103, and D104, respectively.
- the measurement data storage unit A115 of the terminal A101 that is the master terminal stores four pieces of measurement order information 120 corresponding to the terminal A101, the terminal B102, the terminal C103, and the terminal D104.
- measurement order information 120 for the terminal A101 having the ID of the terminal A101 as the instruction receiving terminal ID121 In the measurement data storage unit A115, measurement order information 120 for the terminal A101 having the ID of the terminal A101 as the instruction receiving terminal ID121, measurement order information 120 for the terminal B102 having the ID of the terminal B102 as the instruction receiving terminal ID121, Stores four pieces of measurement order information 120 including measurement order information 120 for the terminal C103 having the ID of the terminal C103 as the instruction receiving terminal ID121 and measurement order information 120 for the terminal D104 having the ID of the terminal D104 as the instruction receiving terminal ID121. is doing.
- the measurement receiving terminal list of the four measurement order information 120 includes three measurement receiving terminal IDs 122, respectively. That is, in each measurement order information 120, the measurement receiving terminal ID 122 has a terminal identified by the instruction receiving terminal ID 121 among the four terminals (terminal A101, terminal B102, terminal C103, and terminal D104) connected to the network 105. IDs of other terminals are stored.
- the arrangement order of the measurement receiving terminal IDs 122 in the measurement receiving terminal list of each measurement order information 120 is such that a plurality of terminals do not transmit a measurement packet sequence simultaneously to a certain terminal, that is, at the same timing.
- a certain terminal is set not to receive a measurement packet sequence from a plurality of terminals simultaneously (at the same timing).
- the order of the measurement receiving terminal IDs 122 in the measurement order information 120 for the terminal A101 is the order of the terminal B102 ID, the terminal D104 ID, and the terminal C103 ID.
- the arrangement order of the measurement receiving terminal IDs 122 in the measurement order information 120 for the terminal B102 is the order of the ID of the terminal C103, the ID of the terminal A101, and the ID of the terminal D104.
- the arrangement order of the measurement receiving terminal IDs 122 in the measurement order information 120 for the terminal C103 is the order of the ID of the terminal D104, the ID of the terminal B102, and the ID of the terminal A101.
- the arrangement order of the measurement receiving terminal IDs 122 in the measurement order information 120 for the terminal D104 is the order of the ID of the terminal A101, the ID of the terminal C103, and the ID of the terminal B102.
- FIG. 6 is a diagram showing the configuration of the measurement result information 130.
- the measurement result information 130 includes a measurement transmission terminal ID 131, a measurement reception terminal ID 132, and an available bandwidth 133.
- the measurement transmission terminal ID 131 indicates the identifier of the transmission source terminal of the measurement packet sequence.
- the measurement receiving terminal ID 132 indicates the identifier of the terminal that is the transmission destination of the measurement packet sequence, that is, the terminal that has received the measurement packet sequence.
- the available bandwidth 133 represents the measurement result of the available bandwidth in the direction from the terminal specified by the measurement transmission terminal ID 131 to the terminal specified by the measurement reception terminal ID 132.
- the measurement order instructing unit A110 of the terminal A101 reads out the measurement order information 120 (see FIGS. 4 and 5) for the own terminal and each slave terminal from the measurement data storage unit A115 (step S201). That is, the measurement order instruction unit A110 reads the measurement order information 120 in which the IDs of the terminal A110, the terminal B102, the terminal C103, and the terminal D104 are stored as the instruction receiving terminal ID 121 from the measurement data storage unit A115.
- the measurement order instruction unit A110 transmits the read measurement order information 120 for each slave terminal to the terminal B102, the terminal C103, and the terminal D104 via the transmission / reception unit A114 (step S202). Further, the measurement order instruction unit A110 supplies the read measurement order information 120 for the own terminal to the measurement order interpretation unit A111.
- the measurement order instructing unit A110 may be configured to dynamically generate the measurement order information 120 for each slave terminal according to the number of slave terminals connected to the network 105.
- the measurement order interpretation unit A111 extracts the measurement receiving terminal list from the measurement order information 120 supplied from the measurement order instruction unit A110.
- the measurement order interpretation unit A111 sequentially extracts the measurement reception terminal ID 122 from the top of the extracted measurement reception terminal list and supplies the measurement reception terminal ID 122 to the measurement packet transmission unit A112.
- the measurement order interpretation unit A111 updates the content of the measurement order information 120 so that the measurement receiving terminal ID 122 extracted from the measurement order information 120 can be known. For example, the most significant bit of the extracted measurement receiving terminal ID 122 stored in the measurement order information 120 is set (set to 1) or the like.
- the measurement packet transmitter A112 transmits a measurement packet sequence to the terminal specified by the supplied measurement receiving terminal ID 122 (step S203).
- the transmission / reception unit A114 When the transmission / reception unit A114 receives data from another terminal (step S204; YES), the transmission / reception unit A114 supplies the data to the available bandwidth calculation unit A113.
- the available bandwidth calculation unit A113 determines the type of the supplied data (step S205). As a result, when the data is a measurement packet sequence (step S205; YES), the available bandwidth calculation unit A113 calculates an available bandwidth using the supplied measurement packet sequence (step S206).
- the available bandwidth calculation unit A113 generates measurement result information 130 (see FIG. 6) based on the calculation result (measurement result) (step S207).
- the available bandwidth calculation unit A113 stores the generated measurement result information 130 in the measurement data storage unit A115 (step S208).
- the available bandwidth calculation unit A113 stores the measurement result information 130 in the measurement data storage unit A115 (Ste S209).
- step S204 When the transmission / reception unit A114 has not received data from another terminal (step S204; NO), the processing of the terminal A101 proceeds to step S210.
- step S210 the measurement order interpreter A111 determines whether or not the transmission of the measurement packet sequence has been completed for all the terminals specified in the measurement receiving terminal list (step S210). As a result, when transmission of the measurement packet sequence has not been completed for all terminals (step S210; NO), the measurement order interpreter A111 uses the measurement reception terminal ID 122 stored next in the measurement reception terminal list. This is supplied to the measurement packet transmitter A112. And measurement packet transmission part A112 transmits a measurement packet sequence with respect to the terminal specified by supplied measurement receiving terminal ID122 (step S203).
- each slave terminal terminal B102, terminal C103, and terminal D104
- a transmission / reception unit B114 for example.
- each slave terminal when the power is turned on, the processing program stored in advance in a predetermined memory is started. Thereafter, the processing shown in the following flowchart is repeatedly executed according to this program.
- the transmission / reception unit B114 or the like determines the type of the received data (step S302).
- the transmission / reception unit B114 and the like supply the measurement order information 120 to the measurement order interpretation unit B111 and the like, and set the packet transmission flag to ON.
- the packet transmission flag is set to ON until transmission of the measurement packet sequence is completed for all terminals specified in the measurement receiving terminal list of the measurement order information 120.
- the packet transmission flag is developed in a memory (not shown) such as a RAM (Random Access Memory) provided in the terminal, and is managed on the memory.
- the measurement packet transmission unit B112 and the like transmits a measurement packet sequence to the terminal specified by the supplied measurement reception terminal ID 122 (step S304).
- the transmission / reception unit B114 and the like supply the measurement packet sequence to the available bandwidth calculation unit B113 and the like.
- the available bandwidth calculation unit B113 and the like calculate the available bandwidth using the supplied measurement packet sequence (step S305).
- the available bandwidth calculation unit B113 and the like generate measurement result information 130 (see FIG. 6) based on the calculation result (measurement result) (step S306).
- the ID of the transmission source terminal of the measurement packet sequence is stored as the measurement transmission terminal ID 131
- the ID of the terminal that is, the own terminal
- the usable bandwidth 133 the calculation result of the usable bandwidth is stored.
- the measurement order interpreter B111 and the like determine whether or not the transmission of the measurement packet sequence has been completed for all the terminals specified in the measurement reception terminal list (step S308). As a result, when transmission of the measurement packet sequence is not completed for all terminals (step S308; NO), the processing of the slave terminal returns to step S301. On the other hand, when transmission of the measurement packet sequence is completed for all terminals (step S308; YES), the measurement order interpreter B111 and the like turn off the packet transmission flag (step S309).
- the available bandwidth calculation unit B113 and the like transmit the measurement result information 130 stored in the measurement data storage unit B115 and the like to the master terminal (terminal A101) via the transmission and reception unit B114 and the like (step S310). Thereafter, the processing of the slave terminal returns to step S301.
- the available bandwidth calculation unit B113 or the like may transmit the measurement result information 130 one by one to the master terminal, or may transmit it as a single data.
- step S301 the transmission / reception unit B114 or the like determines whether or not the packet transmission flag is ON (step S311). If the packet transmission flag is ON (step S311; YES), the slave terminal process proceeds to step S304. At this time, in step S304, the measurement order interpretation unit B111 and the like supply the measurement reception terminal ID 122 stored next in the measurement reception terminal list to the measurement packet transmission unit B112 and the like. And measurement packet transmission part B112 grade
- the master terminal can acquire both usable bands in all communication paths by the process of the master terminal (available band collection process) and the process of each slave terminal.
- a certain terminal for example, terminal B102
- Another terminal for example, terminal C103
- band can be performed in a short time.
- measurement packets are transmitted to other terminals in a predetermined order, so that each terminal transmits a measurement packet sequence to all other terminals simultaneously in parallel (see FIG. 11).
- the available bandwidth can be calculated accurately.
- the present invention can balance the trade-off between short-time measurement and accurate measurement.
- each terminal sequentially transmits a measurement packet sequence one by one in accordance with a preset measurement order, and simultaneously (same timing) to a plurality of terminals. ) Do not send the measurement packet sequence. Furthermore, a plurality of terminals do not transmit a measurement packet sequence to a certain terminal at the same time (at the same timing), in other words, a certain terminal satisfies a condition that a measurement packet sequence is not simultaneously received from a plurality of terminals.
- the measurement order of each terminal is set.
- Each terminal transmits a measurement packet sequence to other terminals in accordance with the measurement order set in this way, so that each terminal transmits two or more measurement packet sequences simultaneously in parallel. Packet sequences do not collide or interfere. Therefore, according to the available bandwidth measurement system of the present embodiment, the bidirectional available bandwidth can be accurately measured in a short time for each communication path between a plurality of terminals connected in a full mesh.
- each slave terminal transmits the calculated measurement result of the usable bandwidth to the master terminal. By doing in this way, all the measurement results can be collected in one terminal in a plurality of terminals.
- the available bandwidth measurement system of the present embodiment can be applied to a system that performs IP telephone conference and IP video conference by connecting a plurality of terminals with a full mesh.
- the bidirectional usable bandwidth can be accurately measured in a short time, and therefore, if the bandwidth consumed by one voice or video is a known fixed value, IP teleconference or IP television
- FIG. 9 shows how measurement packet sequences are transmitted and received and measurement results are transmitted and received when the number of terminals is 3 to 6.
- terminal A instructs terminals B and C in the measurement order.
- Terminal A transmits a measurement packet sequence to terminal B according to the measurement order.
- Terminal B transmits a measurement packet sequence to terminal C according to the measurement order instructed from terminal A.
- Terminal C transmits a measurement packet sequence to terminal A according to the measurement order instructed from terminal A (step 61).
- Each of terminal A to terminal C calculates the available bandwidth using the received measurement packet sequence.
- terminal A transmits a measurement packet sequence to terminal C
- terminal B transmits a measurement packet sequence to terminal A
- terminal C transmits a measurement packet sequence to terminal B (step 62).
- Each of terminal A to terminal C calculates the available bandwidth using the received measurement packet sequence.
- each of the terminal B and the terminal C transmits the measurement result of the available bandwidth calculated by the own terminal to the terminal A (step 63). In this way, the terminal A can grasp the bidirectional usable bandwidth for each communication path between the terminals even when the number of terminals is three.
- terminal A instructs terminal B to terminal D in the measurement order.
- Terminal A first transmits a measurement packet sequence to terminal B, which is the first terminal, in accordance with the measurement order.
- Terminal B transmits a measurement packet sequence to terminal C.
- Terminal C transmits a measurement packet sequence to terminal D, and terminal D transmits a measurement packet sequence to terminal A (step 71).
- Terminals A to D each calculate an available bandwidth using the received measurement packet sequence.
- Terminal A transmits a measurement packet sequence to terminal D, which is the second terminal specified in the measurement order.
- Terminal B transmits a measurement packet sequence to terminal A.
- Terminal C transmits a measurement packet sequence to terminal B, and terminal D transmits a measurement packet sequence to terminal C (step 72).
- Terminals A to D each calculate an available bandwidth using the received measurement packet sequence.
- Terminal A transmits a measurement packet sequence to terminal C, which is the third terminal specified in the measurement order.
- Terminal B transmits a measurement packet sequence to terminal D.
- Terminal C transmits a measurement packet sequence to terminal A, and terminal D transmits a measurement packet sequence to terminal B (step 73).
- Terminals A to D each calculate an available bandwidth using the received measurement packet sequence.
- each of terminal B to terminal D transmits the measurement result of the available bandwidth calculated by itself to terminal A (step 74). In this way, the terminal A can grasp the bidirectional usable bandwidth for each communication path between the terminals even when the number of terminals is four.
- terminal A instructs terminal B to terminal E in the measurement order.
- Terminal A first transmits a measurement packet sequence to terminal B, which is the first terminal, according to the measurement order.
- Terminal B transmits a measurement packet sequence to terminal C
- terminal C transmits a measurement packet sequence to terminal D
- terminal D transmits a measurement packet sequence to terminal E
- terminal E measures to terminal A
- a packet sequence is transmitted (step 81).
- Each of terminal A to terminal E calculates an available bandwidth using the received measurement packet sequence.
- Terminal A transmits a measurement packet sequence to terminal E, which is the second terminal specified in the measurement order.
- Terminal B transmits a measurement packet sequence to terminal A
- terminal C transmits a measurement packet sequence to terminal B
- terminal D transmits a measurement packet sequence to terminal C
- terminal E measures to terminal D A packet sequence is transmitted (step 82).
- Each of terminal A to terminal E calculates an available bandwidth using the received measurement packet sequence.
- Terminal A transmits a measurement packet sequence to terminal C, which is the third terminal specified in the measurement order.
- Terminal B transmits a measurement packet string to terminal D
- terminal C transmits a measurement packet string to terminal E
- terminal D transmits a measurement packet string to terminal A
- terminal E measures to terminal B
- the packet sequence is transmitted (step 83).
- Each of terminal A to terminal E calculates an available bandwidth using the received measurement packet sequence.
- terminal A transmits a measurement packet sequence to terminal D, which is the fourth terminal specified in the measurement order.
- Terminal B transmits a measurement packet string to terminal E
- terminal C transmits a measurement packet string to terminal A
- terminal D transmits a measurement packet string to terminal B
- terminal E measures to terminal C
- the packet sequence is transmitted (step 84).
- Each of terminal A to terminal E calculates an available bandwidth using the received measurement packet sequence.
- each of the terminals B to E transmits the measurement result of the available bandwidth calculated by the own terminal to the terminal A (step 85). In this way, the terminal A can grasp the bidirectional usable bandwidth for each communication path between the terminals even when the number of terminals is five.
- terminal A instructs terminal B to terminal F in the measurement order.
- Terminal A first transmits a measurement packet sequence to terminal B, which is the first terminal, according to the measurement order.
- Terminal B transmits a measurement packet sequence to terminal C
- terminal C transmits a measurement packet sequence to terminal D
- terminal D transmits a measurement packet sequence to terminal E
- terminal E measures to terminal F
- the packet sequence is transmitted, and the terminal F transmits the measurement packet sequence to the terminal A (step 91).
- Each of terminal A to terminal F calculates an available bandwidth using the received measurement packet sequence.
- Terminal A transmits a measurement packet sequence to terminal F, which is the second terminal specified in the measurement order.
- Terminal B transmits a measurement packet sequence to terminal A
- terminal C transmits a measurement packet sequence to terminal B
- terminal D transmits a measurement packet sequence to terminal C
- terminal E measures to terminal D
- the packet sequence is transmitted
- the terminal F transmits the measurement packet sequence to the terminal E (step 92).
- Each of terminal A to terminal F calculates an available bandwidth using the received measurement packet sequence.
- Terminal A transmits a measurement packet sequence to terminal D, which is the third terminal specified in the measurement order.
- Terminal B transmits a measurement packet string to terminal F
- terminal C transmits a measurement packet string to terminal E
- terminal D transmits a measurement packet string to terminal B
- terminal E measures to terminal A
- the packet sequence is transmitted, and the terminal F transmits the measurement packet sequence to the terminal C (step 93).
- Each of terminal A to terminal F calculates an available bandwidth using the received measurement packet sequence.
- Terminal A transmits a measurement packet sequence to terminal E, which is the fourth terminal specified in the measurement order.
- Terminal B transmits a measurement packet sequence to terminal D
- terminal C transmits a measurement packet sequence to terminal F
- terminal D transmits a measurement packet sequence to terminal A
- terminal E measures measurement packet sequence to terminal C
- the packet sequence is transmitted
- the terminal F transmits the measurement packet sequence to the terminal B (step 94).
- Each of terminal A to terminal F calculates an available bandwidth using the received measurement packet sequence.
- each of the terminals B to F transmits the measurement result of the available bandwidth calculated by the own terminal to the terminal A (step 96).
- the terminal A can grasp the bidirectional available bandwidth for each communication path between the terminals even when the number of terminals is six. Even when the number of terminals is 7 or more, the measurement packet sequence is transmitted in the order according to the above description and the content shown in FIG. 9, and the bi-directional usable bandwidth of each communication path is calculated. May be transmitted to the terminal A which is the master terminal.
- each terminal does not necessarily have an available bandwidth calculation unit (available bandwidth calculation means).
- an available bandwidth calculation unit is provided in a device other than the terminal, and information necessary for calculating the available bandwidth is transmitted from each terminal to the device, and the available bandwidth calculation result transmitted from the device. May be configured to be received by the terminal.
- the program it is possible to cause an existing portable information terminal or the like to function as the terminal device according to the present invention. That is, the above-mentioned program for the master terminal and the program for the slave terminal are installed in an existing portable information terminal or the like, and the CPU or the like of the portable information terminal or the like executes the program so that the portable information terminal or the like is installed. It becomes possible to function as a terminal device according to the present invention.
- Such a program distribution method is arbitrary, for example, a computer-readable recording medium such as a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card. It may be stored and distributed in a network, or distributed via a communication network such as the Internet.
- a computer-readable recording medium such as a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card. It may be stored and distributed in a network, or distributed via a communication network such as the Internet.
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Abstract
Description
ネットワークを介して相互に接続された複数の端末装置のそれぞれに対し、計測パケット列を送信すべき送信先の端末装置の順序を指示するステップと、
前記順序に従って、前記複数の端末装置のそれぞれから前記送信先の端末装置へ計測パケット列を送信するステップと、
前記送信先の端末装置における前記計測パケット列の受信状況に基づいて、計測パケット列の送信元から送信先までの経路の利用可能帯域を計算するステップと、を有する、ことを特徴とする。
ネットワークを介して相互に接続されたマスタ端末装置と複数のスレーブ端末装置とを備え、
前記マスタ端末装置は、
前記スレーブ端末装置に対し、計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を通知する計測順番指示手段と、
当該マスタ端末装置用に設定された前記計測順番情報に基づいて、前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する第1の計測順番解釈手段と、
前記第1の計測順番解釈手段が解釈した順序で、前記送信先の端末装置に前記計測パケット列を送信する第1の計測パケット送信手段と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から当該マスタ端末装置までの経路の利用可能帯域を計算する第1の利用可能帯域計算手段と、を備え、
前記スレーブ端末装置は、
前記マスタ端末装置から通知された前記計測順番情報に基づいて、当該スレーブ端末装置が前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する第2の計測順番解釈手段と、
前記第2の計測順番解釈手段が決定した順序で、前記送信先の端末装置に前記計測パケット列を送信する第2の計測パケット送信手段と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から当該スレーブ端末装置までの経路の利用可能帯域を計算する第2の利用可能帯域計算手段と、を備える、ことを特徴とする。
ネットワークを介して相互に接続された他の端末装置に対し、計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を通知する計測順番指示手段と、
自端末装置用に設定された前記計測順番情報に基づいて、前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する計測順番解釈手段と、
前記計測順番解釈手段が解釈した順序で、前記送信先の端末装置に前記計測パケット列を送信する計測パケット送信手段と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から自端末装置までの経路の利用可能帯域を計算する利用可能帯域計算手段と、を備える、ことを特徴とする。
計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を受信し、該受信した計測順番情報に基づいて、自端末装置が前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する計測順番解釈手段と、
前記計測順番解釈手段が決定した順序で、前記送信先の端末装置に前記計測パケット列を送信する計測パケット送信手段と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から自端末装置までの経路の利用可能帯域を計算する利用可能帯域計算手段と、を備える、ことを特徴とする。
コンピュータに、
ネットワークを介して相互に接続された他の端末装置に対し、計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を通知する処理と、
自端末装置用に設定された前記計測順番情報に基づいて、前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する処理と、
前記解釈された順序で、前記送信先の端末装置に前記計測パケット列を送信する処理と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から自端末装置までの経路の利用可能帯域を計算する処理と、を実行させる、
ことを特徴とするプログラムを記録している。
コンピュータに、
計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を受信し、該受信した計測順番に基づいて、自端末装置が前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する処理と、
前記解釈された順序で、前記送信先の端末装置に前記計測パケット列を送信する処理と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から自端末装置までの経路の利用可能帯域を計算する処理と、を実行させる、
ことを特徴とするプログラムを記録している。
105 ネットワーク
A110~D110 計測順番指示部A~D
A111~D111 計測順番解釈部A~D
A112~D112 計測パケット送信部A~D
A113~D113 利用可能帯域計算部A~D
A114~D114 送受信部A~D
A115~D115 計測データ記憶部A~D
120 計測順番情報
121 指示受信端末ID
122 計測受信端末ID
130 計測結果情報
131 計測送信端末ID
132 計測受信端末ID
133 利用可能帯域
Claims (13)
- ネットワークを介して相互に接続された複数の端末装置のそれぞれに対し、計測パケット列を送信すべき送信先の端末装置の順序を指示するステップと、
前記順序に従って、前記複数の端末装置のそれぞれから前記送信先の端末装置へ計測パケット列を送信するステップと、
前記送信先の端末装置における前記計測パケット列の受信状況に基づいて、計測パケット列の送信元から送信先までの経路の利用可能帯域を計算するステップと、を有する、
ことを特徴とする利用可能帯域計測方法。 - 前記順序は、各端末装置において、同一のタイミングで複数の端末に対して計測パケット列を送信せず、且つ、複数の端末装置が、同一の端末装置に対して同一のタイミングで計測パケット列を送信しないという条件を満たすように設定されている、
ことを特徴とする請求項1に記載の利用可能帯域計測方法。 - 前記計測パケット列を送信するステップでは、前記複数の端末装置は、並列的に前記計測パケット列を送信する、
ことを特徴とする請求項1又は2に記載の利用可能帯域計測方法。 - 前記順序を指示するステップでは、前記複数の端末装置のそれぞれに対して、当該端末装置を除く他の端末装置の識別子を前記順序に従って複数個並べたリストを含む計測順番情報を通知する、
ことを特徴とする請求項1乃至3の何れか1項に記載の利用可能帯域計測方法。 - 前記計測パケット列を送信するステップでは、各端末装置は、前記通知された計測順番情報の先頭側から、未処理の端末装置の識別子を1つずつ取り出し、該取り出した端末装置の識別子で特定される端末装置に前記計測パケット列を送信する、
ことを特徴とする請求項4に記載の利用可能帯域計測方法。 - 前記複数の端末装置のうちの一つがマスタ端末装置で残りがスレーブ端末装置であり、前記順序を指示するステップでは、前記マスタ端末装置は、前記スレーブ端末装置に対して、各スレーブ端末装置に対応する前記計測順番情報を送信する、
ことを特徴とする請求項4又は5に記載の利用可能帯域計測方法。 - 前記スレーブ端末装置が、前記計算した利用可能帯域を前記マスタ端末装置に送信するステップを更に有する、
ことを特徴とする請求項6に記載の利用可能帯域計測方法。 - 前記マスタ端末装置は、前記スレーブ端末装置に対して、前記計測順番情報と前記計測パケット列とを同一のタイミングで送信する、
ことを特徴とする請求項6又は7に記載の利用可能帯域計測方法。 - ネットワークを介して相互に接続されたマスタ端末装置と複数のスレーブ端末装置とを備え、
前記マスタ端末装置は、
前記スレーブ端末装置に対し、計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を通知する計測順番指示手段と、
当該マスタ端末装置用に設定された前記計測順番情報に基づいて、前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する第1の計測順番解釈手段と、
前記第1の計測順番解釈手段が解釈した順序で、前記送信先の端末装置に前記計測パケット列を送信する第1の計測パケット送信手段と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から当該マスタ端末装置までの経路の利用可能帯域を計算する第1の利用可能帯域計算手段と、を備え、
前記スレーブ端末装置は、
前記マスタ端末装置から通知された前記計測順番情報に基づいて、当該スレーブ端末装置が前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する第2の計測順番解釈手段と、
前記第2の計測順番解釈手段が決定した順序で、前記送信先の端末装置に前記計測パケット列を送信する第2の計測パケット送信手段と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から当該スレーブ端末装置までの経路の利用可能帯域を計算する第2の利用可能帯域計算手段と、を備える、
ことを特徴とする利用可能帯域計測システム。 - ネットワークを介して相互に接続された他の端末装置に対し、計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を通知する計測順番指示手段と、
自端末装置用に設定された前記計測順番情報に基づいて、前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する計測順番解釈手段と、
前記計測順番解釈手段が解釈した順序で、前記送信先の端末装置に前記計測パケット列を送信する計測パケット送信手段と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から自端末装置までの経路の利用可能帯域を計算する利用可能帯域計算手段と、を備える、
ことを特徴とする端末装置。 - 計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を受信し、該受信した計測順番情報に基づいて、自端末装置が前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する計測順番解釈手段と、
前記計測順番解釈手段が決定した順序で、前記送信先の端末装置に前記計測パケット列を送信する計測パケット送信手段と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から自端末装置までの経路の利用可能帯域を計算する利用可能帯域計算手段と、を備える、
ことを特徴とする端末装置。 - コンピュータに、
ネットワークを介して相互に接続された他の端末装置に対し、計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を通知する処理と、
自端末装置用に設定された前記計測順番情報に基づいて、前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する処理と、
前記解釈された順序で、前記送信先の端末装置に前記計測パケット列を送信する処理と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から自端末装置までの経路の利用可能帯域を計算する処理と、を実行させる、
ことを特徴とする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。 - コンピュータに、
計測パケット列を送信すべき送信先の端末装置の順序を示す計測順番情報を受信し、該受信した計測順番に基づいて、自端末装置が前記送信先の端末装置へ前記計測パケット列を送信する順序を解釈する処理と、
前記解釈された順序で、前記送信先の端末装置に前記計測パケット列を送信する処理と、
他の端末装置から受信した前記計測パケット列を用いて、当該他の端末装置から自端末装置までの経路の利用可能帯域を計算する処理と、を実行させる、
ことを特徴とする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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Also Published As
Publication number | Publication date |
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JP5741446B2 (ja) | 2015-07-01 |
US9059914B2 (en) | 2015-06-16 |
EP2512074A1 (en) | 2012-10-17 |
EP2512074B1 (en) | 2015-04-29 |
US20120307661A1 (en) | 2012-12-06 |
EP2512074A4 (en) | 2013-12-25 |
JPWO2011071127A1 (ja) | 2013-04-22 |
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