WO2017195357A1 - Appareil de communication, procédé de communication et programme de communication - Google Patents

Appareil de communication, procédé de communication et programme de communication Download PDF

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Publication number
WO2017195357A1
WO2017195357A1 PCT/JP2016/064326 JP2016064326W WO2017195357A1 WO 2017195357 A1 WO2017195357 A1 WO 2017195357A1 JP 2016064326 W JP2016064326 W JP 2016064326W WO 2017195357 A1 WO2017195357 A1 WO 2017195357A1
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WO
WIPO (PCT)
Prior art keywords
communication
port
communication device
transmission right
transmission
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PCT/JP2016/064326
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English (en)
Japanese (ja)
Inventor
嗣也 大石
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2016/064326 priority Critical patent/WO2017195357A1/fr
Priority to TW105118105A priority patent/TW201740705A/zh
Publication of WO2017195357A1 publication Critical patent/WO2017195357A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/42—Loop networks
    • H04L12/427—Loop networks with decentralised control
    • H04L12/433—Loop networks with decentralised control with asynchronous transmission, e.g. token ring, register insertion

Definitions

  • the present invention relates to a communication device, a communication method, and a communication program.
  • a plurality of control devices that support full-duplex communication are connected to a network for communication.
  • This communication includes regular communication that is periodically performed every communication cycle and irregular communication that is performed each time a request is made. If the control device does not recognize the position of another control device, data is transmitted from both ports during the ring configuration. Further, in the case of a ring configuration, one control device has a blocking port, that is, a port that blocks a packet from being relayed so that a broadcast storm does not occur.
  • a token passing method In the token passing method, tokens are handed over to each control device in order via the network, and only the control device that fetches the token has the right to transmit data, thereby performing transmission control that avoids data collisions. Yes.
  • CC-Link IE Fielded the amount of irregular communication that can be transmitted is limited in order to ensure the regularity of regular communication and to mix with irregular communication.
  • a link scan unit restriction method As one of the limiting methods for limiting the amount of irregular communication, there is a method in which the maximum irregular communication amount that can be transmitted while a token makes a round of each control device is determined, that is, a link scan unit restriction method.
  • An object of the present invention is to improve the transmission efficiency of regular communication and irregular communication by enabling irregular communication to be performed from other than a control device having a transmission right in a ring topology. To do.
  • a communication device is a communication system in which a plurality of communication devices each having a first port and a second port are connected in a ring shape, and a frame is transmitted between the plurality of communication devices.
  • a periodic frame including data that is transmitted when the transmission right is held in the own communication apparatus and is periodically transmitted is generated, and the periodic frame is transmitted from the first port to the own communication apparatus.
  • a port control unit that disables the first port when the transmission right is held in the next communication device.
  • the communication apparatus includes a transmission unit that transmits a periodic frame from the first port to the second port of the next communication apparatus when the transmission right is held in the own communication apparatus; And a port control unit that disables the first port when held in the communication device. Therefore, irregular communication can be performed from a communication apparatus other than the transmission right, and the transmission efficiency of regular communication and irregular communication can be improved.
  • FIG. 1 is a configuration diagram of a communication system 500 according to Embodiment 1.
  • FIG. It is an example of communication in the communication system 500 of FIG. 1, and is a diagram showing communication of a comparative example for comparison with the present embodiment.
  • 1 is a configuration diagram of a communication device 100 according to Embodiment 1.
  • FIG. FIG. 4 is a flowchart of communication method 510 of communication device 100 and communication processing S100 of communication program 520 according to the first embodiment.
  • FIG. 4 is a flowchart of communication method 510 of communication device 100 and communication processing S100 of communication program 520 according to the first embodiment.
  • FIG. 4 is a flowchart of communication method 510 of communication device 100 and communication processing S100 of communication program 520 according to the first embodiment.
  • FIG. 6 is a configuration diagram of a communication device 100 according to a modification of the first embodiment.
  • FIG. *** Explanation of configuration *** FIG. 1 is a diagram showing a communication system 500 according to the present embodiment.
  • the communication system 500 constitutes a ring topology in which a plurality of communication devices are connected in a ring shape.
  • the communication device 100_1, the communication device 100_2, the communication device 100_3, and the communication device 100_4 form a ring topology.
  • all, part, or each of the communication device 100_1, the communication device 100_2, the communication device 100_3, and the communication device 100_4 may be simply referred to as the communication device 100.
  • the communication device 100 is a control device that constitutes an FA network system.
  • the communication device 100 has a first port 101 and a second port 102. As shown in FIG. 1, in the communication system 500, the first port 101 of the communication device 100 and the second port of the adjacent communication device 100 are connected. As an example, the first port of the communication device 100_1 is connected to the second port of the communication device 100_2, and the second port of the communication device 100_1 is connected to the first port of the communication device 100_4.
  • the transmission path that connects the communication apparatuses 100 may be any transmission path such as wired, wireless, or the like.
  • the communication system 500 sequentially moves transmission rights for transmitting frames among a plurality of communication devices.
  • the transmission right is a token.
  • the transmission right rotates in the order of the communication device 100_1, the communication device 100_2, the communication device 100_3, the communication device 100_4, the communication device 100_1, the communication device 100_2, the communication device 100_3,.
  • the direction in which the transmission right moves is referred to as a transmission right direction 501.
  • the input port is the second port 102 and the output port is the first port 101.
  • the reverse direction of the transmission right direction 501 is defined as an irregular communication direction 502.
  • FIG. 2 is an example of communication in the communication system 500 of FIG. 1 and is a diagram illustrating communication of a comparative example for comparison with the present embodiment.
  • FIG. 2 shows an example in which irregular communication is no longer possible from the communication device 100_4 as a result of performing irregular communication from the communication device 100_3.
  • the numbers of the communication device 100_1, the communication device 100_2, the communication device 100_3, and the communication device 100_4 are 1, 2, 3, and 4.
  • a frame including the transmission right 200 of the communication device 100_2 is transmitted to all the communication devices.
  • a frame including the transmission right 200 is referred to as a token frame.
  • the transmission right 200 is given an identifier for identifying each of the plurality of communication devices.
  • the number of the communication device is assigned to the transmission right 200 as an identifier.
  • the transmission right 200 to which the communication device number is assigned may be referred to as the transmission right 200 of the communication device.
  • the communication apparatus holds the transmission right 200.
  • a token frame including the transmission right 200 of the communication device 100_3 is transmitted to all the communication devices.
  • communication device 100 is a computer.
  • the communication device 100 includes a processor 910 and other hardware such as a storage device 920, a first port 101, and a second port 102.
  • the storage device 920 includes a memory 921 and an auxiliary storage device 922.
  • the communication device 100 includes a transmission right control unit 110, a transmission unit 120, a direction determination unit 130, a port control unit 140, and a storage unit 150 as functional configurations.
  • the transmission unit 120 includes a frame generation unit 121 and a frame transmission unit 122.
  • the transmission right control unit 110, the frame generation unit 121, the frame transmission unit 122, the direction determination unit 130, and the port control unit 140 in the communication device 100 are functioned as “units” of the communication device 100. That's it.
  • the function of “unit” of the communication apparatus 100 is realized by software.
  • the storage unit 150 is realized by the storage device 920.
  • the storage unit 150 includes a reception buffer 151, a relay buffer 152, a transmission direction 153, and a control target port 154.
  • the reception buffer 151 is a buffer that holds a received frame.
  • the relay buffer 152 is a buffer that holds a frame to be relayed when the received frame is not addressed to the own communication device.
  • the reception buffer 151 and the relay buffer 152 are provided for each port.
  • the processor 910 is connected to other hardware via a signal line, and controls these other hardware.
  • the processor 910 is an IC (Integrated Circuit) that performs processing.
  • the processor 910 is a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), or the like.
  • the storage device 920 includes a memory 921 and an auxiliary storage device 922.
  • the auxiliary storage device 922 is a ROM (Read Only Memory), a flash memory, or an HDD (Hard Disk Drive).
  • the memory 921 is a RAM (Random Access Memory).
  • the storage unit 150 is realized by the memory 921.
  • the storage unit 150 may be realized by the auxiliary storage device 922, or may be realized by the memory 921 and the auxiliary storage device 922. A method for realizing the storage unit 150 is arbitrary.
  • Each of the first port 101 and the second port 102 is a port that transmits and receives a frame.
  • the auxiliary storage device 922 stores a program that realizes the function of “unit”. This program is loaded into the memory 921, read into the processor 910, and executed by the processor 910.
  • the auxiliary storage device 922 also stores an OS (Operating System). At least a part of the OS is loaded into the memory 921, and the processor 910 executes a program that realizes the function of “unit” while executing the OS.
  • OS Operating System
  • the communication device 100 may include a plurality of processors that replace the processor 910.
  • the plurality of processors share the execution of a program that realizes the function of “unit”.
  • Each processor is an IC that performs processing in the same manner as the processor 910.
  • Information, data, signal values, and variable values indicating the results of processing by the function of “unit” are stored in the memory 921, the auxiliary storage device 922, or a register or cache memory in the processor 910.
  • an arrow connecting each unit and the storage unit 150 indicates that each unit stores the processing result in the storage unit 150 or that each unit reads information from the storage unit 150.
  • arrows connecting the respective parts represent the flow of control.
  • the program for realizing the function of “part” may be stored in a portable recording medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a Blu-ray (registered trademark) disk, or a DVD (Digital Versatile Disc).
  • a portable recording medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a Blu-ray (registered trademark) disk, or a DVD (Digital Versatile Disc).
  • the communication program 520 which is also referred to as a communication program 520, that realizes the function of “part” is a program that realizes the function described as “part”.
  • what is called a communication program product is a storage medium and storage device in which the communication program 520 is recorded, and is loaded with a computer-readable program regardless of the appearance format.
  • step S101 the direction determination unit 130 determines whether or not the data transmission direction of the communication apparatus having the transmission right and the data transmission direction of the communication apparatus not having the transmission right are determined.
  • a data transmission direction of a communication apparatus having a transmission right is a transmission right direction 501
  • a data transmission direction of a communication apparatus having no transmission right is an irregular communication direction 502.
  • the direction determination unit 130 refers to the transmission direction 153 stored in the storage unit 150 and determines whether the transmission right direction 501 and the irregular communication direction 502 are determined. For example, when an input port and an output port are set in the transmission direction 153, it is determined that the transmission right direction 501 and the irregular communication direction 502 are determined.
  • the second port 102 is set as the input port
  • the first port 101 is set as the output port. That is, the direction of the communication device 100_1, the communication device 100_2, the communication device 100_3, the communication device 100_4, the communication device 100_1,. Further, the direction of the communication device 100_1, the communication device 100_4, the communication device 100_3, the communication device 100_2, the communication device 100_1,...
  • the direction determination unit 130 proceeds to step S102. When it is determined that the direction is not determined, the direction determination unit 130 repeats the process until it is determined. Usually, it is assumed that an input port and an output port are set in advance in the transmission direction 153 of the storage unit 150.
  • the transmission right control unit 110 determines whether or not a port to be enabled or disabled is recognized after the transmission right is moved.
  • a port to be enabled or disabled after the transmission right is moved is set as a control target port.
  • the transmission right control unit 110 refers to the control target port 154 stored in the storage unit 150 and determines whether or not the control target port is recognized. For example, if the first port 101 or the second port 102 is set in the control target port 154, the transmission right control unit 110 determines that the control target port is recognized. In the present embodiment, the first port 101 is set as the control target port 154. The transmission right control unit 110 recognizes the first port 101 as a control target port.
  • the process proceeds to step S103. If the transmission right control unit 110 determines that the control target port is not recognized, the transmission right control unit 110 repeats the process until it is recognized. Normally, it is assumed that a control target port is set in advance in the control target port 154 of the storage unit 150.
  • step S103 the transmission right control unit 110 detects which communication device holds the transmission right.
  • the transmission right control unit 110 determines whether or not the transmission right has moved in the communication system 500. If it is determined that the transmission right has moved, the process proceeds to step S104. If the transmission right 200 has not moved, the process is repeated until the transmission right 200 moves.
  • step S104 the transmission right control unit 110 determines whether or not the own communication device holds the transmission right. If it is determined that the own communication apparatus holds the transmission right, the process proceeds to step S105. If it is determined that the communication apparatus does not hold the transmission right, the process proceeds to step S110.
  • the communication apparatus 100 broadcasts a token frame including the transmission right of the next communication apparatus to all other communication apparatuses.
  • the transmission right control unit 110 of each communication apparatus determines that the transmission right has moved. Also, the transmission right control unit 110 of each communication device determines that the own communication device has held the transmission right if the transmission right included in the received token frame is the transmission right of the own communication device. On the other hand, if the transmission right included in the received token frame is the transmission right of any communication device, the transmission right control unit 110 of each communication device determines that the communication device has held the transmission right.
  • the transmission right control unit 110 determines which communication device is the transmission right based on the identifier assigned to the transmission right, that is, the number of the communication device. As described above, the transmission right control unit 110 can determine which communication apparatus has the current transmission right 200. Further, the transmission right control unit 110 can also determine whether the previous transmission right 200 was in the own communication device or whether the previous transmission right 200 was in the own communication device.
  • the transmission unit 120 In the transmission processing S10 from step S105 to step S108, the transmission unit 120 generates a periodic frame 210 that includes data that is transmitted when the transmission right is held in the communication device and that is transmitted periodically.
  • the periodic frame 210 is transmitted from the first port 101 to the second port 102 of the communication device next to the communication device. That is, the transmission unit 120 transmits the regular frame 210 in the transmission right direction.
  • the regular frame 210 is also referred to as a regular communication frame.
  • the transmission unit 120 performs irregular communication in the transmission right direction when irregular communication is possible and there is data to be transmitted by irregular communication.
  • step S105 the frame generation unit 121 generates a regular frame 210 including data to be transmitted periodically.
  • the frame transmission unit 122 transmits the regular frame 210 to the next communication device via the first port 101. That is, the frame transmission unit 122 transmits the regular frame 210 in the transmission right direction 501.
  • step S106 the frame transmission unit 122 determines whether or not irregular communication is possible. Specifically, the frame transmission unit 122 can perform irregular communication if the own communication device holds the transmission right and has not been transmitted up to the maximum irregular communication amount (also referred to as irregular communication possible amount). Judge that there is. If irregular communication is possible, the frame transmission unit 122 proceeds to step S107. If irregular communication is not possible, the frame transmission unit 122 proceeds to step S109.
  • step S107 the frame transmission unit 122 determines whether there is data to be transmitted by irregular communication. That is, the frame transmission unit 122 determines whether or not irregular communication is necessary. If irregular communication is necessary, the frame transmission unit 122 proceeds to step S108. If irregular communication is not necessary, the frame transmission unit 122 proceeds to step S109.
  • step S108 the frame generation unit 121 generates an irregular frame 220 including data for irregular communication.
  • the frame transmission unit 122 transmits the irregular frame 220 to the next communication device via the first port 101. That is, the frame transmission unit 122 transmits the irregular frame 220 in the transmission right direction 501.
  • step S109 the transmission right control unit 110 generates a token frame including the transmission right of the next communication device and broadcasts it to all other communication devices. Thereafter, the process returns to step S103.
  • step S110 the transmission right control unit 110 determines whether or not the transmission right is held in the next communication device. That is, the transmission right control unit 110 determines whether the own communication apparatus has held the transmission right last time. If the transmission right is held in the next communication device, the process proceeds to step S111. Otherwise, the process proceeds to step S114.
  • step S111 the port control unit 140 performs a port control process S20 that invalidates the first port 101 when the transmission right is held in the next communication device. Disabling a port means preventing input / output from that port. Disabling a port is also called blocking a port.
  • step S112 to step S113 when the first port 101 is invalidated by the port control unit 140, the transmission unit 120 is data that is transmitted when the transmission right is not held in the own communication device. It is determined whether there is data to be transmitted periodically. When there is data to be transmitted irregularly, the transmission unit 120 generates an irregular frame 220 including the data transmitted irregularly. The transmission unit 120 transmits the irregular frame 220 from the second port 102 to the first port 101 of the communication device in front of the own communication device. That is, the transmission unit 120 transmits the irregular frame 220 in the irregular communication direction opposite to the transmission right direction.
  • step S112 the frame transmission unit 122 determines whether there is data to be transmitted by irregular communication. That is, the frame transmission unit 122 determines whether or not irregular communication is necessary. If irregular communication is necessary, the frame transmission unit 122 proceeds to step S113. If irregular communication is not necessary, the process returns to step S103.
  • step S113 the frame generation unit 121 generates an irregular frame 220 including data for irregular communication. The frame transmission unit 122 transmits the irregular frame 220 to the previous communication device via the second port 102. That is, the frame transmission unit 122 transmits the irregular frame 220 in the irregular communication direction 502.
  • step S114 the transmission right control unit 110 determines whether or not the transmission right is held in the next communication device. That is, the transmission right control unit 110 determines whether the own communication device has held the transmission right two times before. If the transmission right is held in the next communication device, the process proceeds to step S115. Otherwise, the process proceeds to step S116.
  • step S115 the port control unit 140 performs processing for enabling the first port 101 when the transmission right is held in the next communication device. Enabling a port means enabling input / output from that port. Enabling a port is also referred to as releasing port blocking.
  • the communication device receives the irregular frame 220 transmitted from the second port 102 of the next communication device through the first port 101.
  • step S116 the transmission unit 120 determines whether there is data destined for the communication device that holds the transmission right and is transmitted irregularly. If there is data addressed to the communication device holding the transmission right, the transmission unit 120 proceeds to step S117. If there is no data addressed to the communication device holding the transmission right, the transmission unit 120 returns the process to step S103.
  • step S117 the frame generation unit 121 generates an irregular frame 220 including data addressed to the communication device holding the transmission right and transmitted irregularly.
  • the frame transmission unit 122 transmits the irregular frame 220 to the previous communication device via the second port 102. That is, the frame transmission unit 122 transmits the irregular frame 220 in the irregular communication direction 502 opposite to the transmission right direction 501.
  • step S116 and step S117 the processing in the case where the communication device holding the transmission right is not the own communication device, the next communication device, or the next next communication device, that is, NO in step S103, and Processing in the case of NO in step S110 and NO in step S114 is included.
  • the irregular frame 220 is transmitted in the irregular communication direction 502 opposite to the transmission right direction 501.
  • FIG. 7 is a diagram showing communication using the communication process S10 of the communication system 500 according to the present embodiment.
  • FIG. 8 is a schematic diagram showing the phase (1) in FIG.
  • FIG. 9 is a schematic diagram showing the phase (2) in FIG.
  • FIG. 10 is a schematic diagram showing the phase (3) in FIG.
  • FIG. 11 is a schematic diagram illustrating the phase (4) in FIG. 7.
  • the communication using the communication process S100 of the communication system 500 according to the present embodiment will be specifically described with reference to FIGS.
  • the communication device 100_4 wants to perform a large amount of irregular communication with the communication device 100_3.
  • each communication device 100 transmits the transmission right direction 501 that is the data transmission direction of the communication device having the transmission right 200 and the irregular transmission time that is the data transmission direction of the communication device that does not have the transmission right 200.
  • a communication direction 502 is determined. Further, each communication device 100 determines a control target port to be enabled or disabled after the transmission right is transferred.
  • the irregular communication possible amount n indicates the maximum amount that can be irregularly transmitted in one cycle as described above. Here, as an example, the maximum amount that can be transmitted irregularly in one cycle is described as one frame.
  • step S11 of FIG. 7 the communication device 100_2 holding the transmission right 200 transmits the regular frame 210 in the transmission right direction 501. The communication device 100_2 broadcasts the regular frame 210.
  • the communication device 100_4 broadcasts a token frame including the transmission right of the communication device 100_1.
  • the state of the port of each communication device at the start of the phase (2) in FIG. 7 is that the first port 101 of the communication device 100_3 holding the previous transmission right 200 is invalid. Yes.
  • the communication device 100_4 disables the first port 101, and the communication device 100_3 enables the first port 101.
  • the communication device 100_2 and the communication device 100_3 can perform irregular communication in the irregular communication direction 502 with respect to the communication device 100_1 holding the transmission right 200. Become.
  • the communication device 100_4 can perform irregular communication in the irregular communication direction 502 with respect to all the communication devices 100. Further, the communication device 100_1 can perform regular communication and irregular communication in the transmission right direction 501 as usual. Thereafter, the communication system 500 repeats the communication cycle while circulating the transmission right 200 to the four communication devices 100.
  • two ports are provided as the ports for transmitting and receiving frames.
  • two or more ports may be provided.
  • the following input interface, output interface, and communication device may be provided.
  • the first port 101 and the second port 102 may be provided as part of the input interface, the output interface, and the communication device.
  • the input interface is a port connected to an input device such as a mouse, a keyboard, or a touch panel.
  • the input interface is a USB terminal.
  • the input interface may be a port connected to a LAN (Local Area Network).
  • the output interface is a port to which a cable of a display device such as a display device is connected.
  • the output interface 940 is a USB terminal or a HDMI (registered trademark) (High Definition Multimedia Interface) terminal.
  • the display device is an LCD (Liquid Crystal Display).
  • the output interface may be connected to an output device such as a printer device.
  • the communication device includes a receiver and a transmitter.
  • the communication device is a communication chip or a NIC (Network Interface Card).
  • the communication device functions as a communication unit that communicates data.
  • the receiver is a receiving device that receives data
  • the transmitter is a transmitting device that transmits data.
  • the function of “unit” of communication device 100 is realized by software. However, as a modification, the function of “unit” of communication device 100 may be realized by hardware.
  • the configuration of communication apparatus 100 according to a modification of the present embodiment will be described using FIG. As illustrated in FIG. 12, the communication device 100 includes hardware such as a first port 101 and a second port 102.
  • the processing circuit 909 is a dedicated electronic circuit that realizes the function of the “unit” and the storage unit 150 described above. Specifically, the processing circuit 909 includes a single circuit, a composite circuit, a programmed processor, a processor programmed in parallel, a logic IC, a GA (Gate Array), an ASIC (Application Specific Integrated Circuit), or FPGA (Field-Programmable / Gate / Array).
  • the communication apparatus 100 may include a plurality of processing circuits that replace the processing circuit 909. As a whole, the function of “unit” is realized by the plurality of processing circuits.
  • Each processing circuit is a dedicated electronic circuit, like the processing circuit 909.
  • the function of the communication device 100 may be realized by a combination of software and hardware. That is, some functions of the communication device may be realized by dedicated hardware, and the remaining functions may be realized by software.
  • the processor 910, the storage device 920, and the processing circuit 909 are collectively referred to as a “processing circuit”. That is, regardless of the configuration of the communication device shown in FIGS. 3 and 12, the function of “unit” and the storage unit 150 are realized by a processing circuit.
  • Part may be read as “Process”, “Procedure” or “Process”. Further, the function of “unit” may be realized by firmware.
  • the control target port to be blocked is determined based on the transfer of the transmission right.
  • a transmission right direction that is a transmission direction of data (periodic communication, irregular communication) of a communication device having a transmission right and an irregular communication direction of a communication device that does not have the transmission right are determined. Therefore, a communication device having a prokking port can perform irregular communication in an irregular communication direction with respect to all communication devices on the communication system path. Therefore, it is possible to improve the transmission efficiency of regular communication and irregular communication in the communication system.
  • a communication device having a blocking port is a terminal communication device because the communication system has a ring topology. Therefore, the partner communication device always exists on the route, and data can be transmitted reliably. Therefore, this method can be realized even if each control device does not know the position of another control device.
  • the first embodiment of the present invention has been described. However, only one of those described as “parts” in the description of this embodiment may be adopted, or some arbitrary combinations may be adopted. It may be adopted. That is, the functional block of the communication device is arbitrary as long as the functions described in the above embodiments can be realized.
  • the communication apparatus may be configured with any combination of these functional blocks or with an arbitrary block configuration. Further, the communication device may be composed of a plurality of devices instead of a single device.
  • Embodiment 1 was demonstrated, you may implement combining several parts among this Embodiment. Alternatively, one part of this embodiment may be implemented. In addition, this embodiment may be implemented in any combination as a whole or in part. In addition, said embodiment is an essentially preferable illustration, Comprising: It does not intend restrict
  • 100, 100_1, 100_2, 100_3, 100_4 communication device 101 first port, 102 second port, 110 transmission right control unit, 120 transmission unit, 121 frame generation unit, 122 frame transmission unit, 130 direction determination unit, 140 Port control unit, 150 storage unit, 151 reception buffer, 152 relay buffer, 153 transmission direction, 154 controlled port, 200 transmission right, 210 periodic frame, 220 irregular frame, 500 communication system, 501 transmission right direction, 502 irregular Communication direction, 510 communication method, 520 communication program, 909 processing circuit, 910 processor, 920 storage device, 921 memory, 922 auxiliary storage device, S100 communication processing, S10 transmission processing, S20 port control processing

Abstract

Selon la présente invention, un appareil de communication (100) est inclus dans un système de communication dans lequel une pluralité d'appareils de communication présentant chacun un premier port (101) et un second port (102) sont connectés en forme d'anneau, et dans lequel un droit de transmission permettant de transmettre une trame est transféré dans un ordre parmi la pluralité d'appareils de communication. L'appareil de communication (100) est pourvu d'une unité de transmission (120) permettant de générer une trame périodique comprenant des données qui sont périodiquement transmises lorsque le droit de transmission est maintenu dans ledit appareil de communication, et de transmettre la trame périodique du premier port (101) au second port (102) d'un appareil de communication suivant dans l'ordre dudit appareil de communication. De plus, l'appareil de communication (100) est pourvu d'une unité de commande de port (140) qui invalide le premier port (101) lorsque le droit de transmission est maintenu par l'appareil de transmission suivant dans l'ordre.
PCT/JP2016/064326 2016-05-13 2016-05-13 Appareil de communication, procédé de communication et programme de communication WO2017195357A1 (fr)

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TW105118105A TW201740705A (zh) 2016-05-13 2016-06-08 通信裝置、通信方法以及通信程式產品

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