JP4832828B2 - Communications system - Google Patents

Description

  The present invention relates to a technique for performing communication between a large number of nodes.

  In recent years, vehicles are equipped with a large number of in-vehicle devices such as in-vehicle cameras and navigation devices, and these various in-vehicle devices are connected to each other so as to be capable of data communication.

  Usually, different communication standards are used for connection of each vehicle-mounted device depending on the contents of communication data. Conventionally, each in-vehicle device is connected by a plurality of types of communication lines conforming to respective communication standards.

  As a prior art related to the invention of the present application, for example, there is one described in Patent Document 1.

JP 2002-152244 A

  However, in the above prior art, since it is necessary to use a large number of communication lines, there is a problem that the work of installing and connecting the communication lines is difficult and the vehicle weight is also increased.

  Accordingly, an object of the present invention is to enable data transmission or reception between a large number of nodes with a smaller number of transmission paths.

The present invention is a communication system in which at least one intermediate communication device is connected between a first communication device and a second communication device, wherein the first communication device includes a plurality of input units, A plurality of data of different communication standards input via each input unit is latched, and this is continuously output in a predetermined order to generate serial data arranged in time series. A serial data generation unit; and a transmission unit that outputs serial data generated by the serial data generation unit. The intermediate communication device includes an intermediate reception unit that receives serial data; and at least one intermediate input unit; , wherein the serial data received at the intermediate receiver latches the data inputted via the intermediate input section, time series by successively output in a predetermined order that is determined this advance An intermediate serial data generation unit that generates serial data arranged; and an intermediate transmission unit that outputs the serial data generated by the intermediate serial data generation unit, wherein the second communication device receives the serial data. wherein a receiving unit, together with the return serial data received by the receiving unit to the data the with the received serial data via an intermediate input unit input with said intermediate receiving unit, a serial data returned here to A standard data generation unit that returns data of a plurality of different communication standards input via each input unit, and a plurality of output units that output data according to each communication standard.

The present invention is also a communication system in which at least one intermediate communication device is connected between the first communication device and the second communication device, wherein the second communication device includes a plurality of input units. Chronologically by latching a plurality of data of different communication standards inputted via a part of the input parts of the respective input parts and continuously outputting the data in a predetermined order. Serial data arranged serially at the same time, and the generated serial data and the data input through the other input units among the input units are latched, and this is predetermined. A serial data generation unit that generates serial data serially arranged in time series by continuously outputting in order, and a transmission unit that outputs serial data generated by the serial data generation unit, Through Apparatus, an intermediate receiver for receiving serial data, corresponding to the intermediate receiver received at the other input via an input the original communication standards among the respective input unit based on the serial data An intermediate data generation unit for returning data and serial data generated based on a plurality of different communication standard data input via some of the input units; and the intermediate data generation unit An intermediate output unit that outputs the generated data according to the original communication standard; and an intermediate transmission unit that outputs the serial data generated by the intermediate data generation unit, the first communication device, a receiver for receiving serial data, the serial data received by the receiving unit, standard data generation returning the data corresponding to each communication standard input via a part of the input portion of the input section When those having a plurality of outputs for outputting data corresponding to each communication standard.

  Further, when the two communication systems are combined, an optical fiber may be used as a signal transmission path through which a relatively large amount of data is transmitted, and a metal cable may be used as a signal transmission path through which a relatively small amount of data is transmitted.

According to the communication system of the present invention, a communication system in which at least one intermediate communication device is connected between a first communication device and a second communication device, wherein the first communication device has a plurality of inputs. And serial data arranged in time series by latching a plurality of data of different communication standards input via the respective input units and continuously outputting the data in a predetermined order. A serial data generation unit that generates data; and a transmission unit that outputs serial data generated by the serial data generation unit, wherein the intermediate communication device includes at least one intermediate reception unit that receives serial data; an intermediate input unit, the latches and data input via the serial data received by the intermediate receiving portion of the intermediate input unit, out continuously in a predetermined order that is determined this advance An intermediate serial data generation unit for generating a series in ordered serial data when by, and an intermediate transmission section for outputting the serial data generated by the intermediate serial data generation unit, the second communication apparatus includes a receiver for receiving serial data, the return serial data received by the receiving unit to the data input via the received serial data to said intermediate input unit in the intermediate receiver, wherein A standard data generation unit for returning the returned serial data to a plurality of data of different communication standards input via the input units; and a plurality of output units for outputting data corresponding to the communication standards. Therefore, the data can be transmitted to the second communication system with the data added by the intermediate communication device on the way. As a result, data can be transmitted from a large number of nodes with fewer transmission paths.

According to another communication system of the present invention, there is provided a communication system in which at least one intermediate communication device is connected between the first communication device and the second communication device, wherein the second communication device includes: A plurality of input units and a plurality of different communication standard data inputted via a part of the input units, and successively latching the data in a predetermined order. The serial data arranged serially in time series is generated by outputting, and the generated serial data and the data input through the other input units among the input units are latched, a serial data generation unit for generating a serial data arranged serially in time series by successively output in a predetermined a predetermined order, feeding and outputs the serial data generated by the serial data generation section The intermediate communication device is configured to input an intermediate receiving unit that receives serial data and another input unit among the input units based on the serial data received by the intermediate receiving unit. intermediate data generation back to the serial data generated based on the data of a part of the input unit via the input a plurality of different communication standards of the data and the respective input unit in accordance with the original communication standards that are An intermediate output unit that outputs data according to the original communication standard generated by the intermediate data generation unit, and an intermediate transmission unit that outputs serial data generated by the intermediate data generation unit The first communication device includes: a receiving unit that receives serial data; and the serial data received by the receiving unit, each communication standard that is input via a part of the input units. Depending on A standard data generator back to the data, since it has a plurality of output unit for outputting data corresponding to each communication standard, a node connected to the intermediate communication device retrieves the data at an intermediate communication device on the way Can be given data. As a result, data can be received by a large number of nodes with fewer transmission paths.

  In addition, a relatively large amount of data can be transmitted by using an optical fiber as a signal transmission path, while a metal cable is used as a signal transmission path through which a relatively small amount of data is transmitted. Cable laying work can be easily performed.

  Hereinafter, a communication system according to an embodiment of the present invention will be described. Here, an example in which the communication system is applied to a vehicle will be described. However, the communication system is a communication system that connects many nodes such as a LAN in the field of OA (office automation) and FA (factory automation). Applicable.

  FIG. 1 is an overall configuration diagram showing a communication system mounted on a vehicle.

  In this communication system, at least one (here, one) intermediate communication device 30 is connected between the first communication device 10 and the second communication device 20. The first communication device 10, the second communication device 20, and the intermediate communication device 30 are distributed at appropriate positions in the vehicle, and nearby nodes are connected to each. Here, the first communication device 10 is provided on the front left side of the vehicle, the intermediate communication device 30 is provided on the front right side of the vehicle, and the second communication device 20 is provided on the rear part of the vehicle.

  Examples of nodes connected to the communication devices 10, 20, and 30 include a front monitoring camera that images the front of the vehicle, an indoor camera, a rear camera, a camera display that displays a monitoring image from each camera, a navigation display, and a rear display. , A sound device such as a DVD player, a hard disk device (storage device) storing navigation map information, a navigation control unit, an audio amplifier, and the like, a device for driving assistance, a device for multimedia, and the like. Furthermore, devices related to operation control such as an engine control unit, a brake control unit, and an electric power steering control unit may be connected to each of the communication devices 10, 20, and 30 as nodes.

  Here, for convenience of explanation, an example in which the next node is connected to each communication device 10, 20, 30 will be described. That is, the first communication device 10 is connected with a side camera 10a that images one side of the vehicle as a node, and the intermediate communication device 30 is connected with a side camera 30a that images the other side of the vehicle. Has been. Further, the second communication device 20 performs predetermined image processing and predetermined peripheral monitoring processing based on the captured images from the side cameras 10a and 30a, and also performs the processing on the side cameras 10a and 30a. A camera control unit 20b for giving an operation command such as power on / off is connected.

  The first communication device 10 and the intermediate communication device 30 are connected so as to be able to transmit data via a transmission line 40, and the intermediate communication device 30 and the second communication device 20 can be transmitted via a transmission line 42. It is connected. Here, a case will be described in which each of the transmission lines 40 and 42 includes a pair of shielded twisted pair cables (STP) 40a and 40b or 42a and 42b. However, as the transmission path 42, various transmission paths such as an optical fiber can be used as will be described later.

  FIG. 2 is an explanatory diagram showing an example of the flow of data in the communication system. That is, in order to transmit the data communication generated between the nodes as described above to each other between the communication devices 10, 20, and 30, various video data, audio data, other multimedia data, Control data related to the operation of the vehicle is transmitted.

  Here, the data input to the first communication device 10 is transmitted in the uplink direction. Data input to the first communication device 10 is, for example, image data of the side camera 10a. For example, when the image data has a resolution of XGA and 30 frames / second, it needs to be transmitted at a transmission rate of 1024 dots × 768 dots × 24 bit gradation × 30 frames / second = 556 Mbps or more. For convenience of explanation, the direction of the second communication device 20 from the first communication device 10 that is one of the two directions of data transmission between the first communication device 10 and the second communication device 10 is uplinked. The direction from the second communication device 20 on the other side to the first communication device 10 is referred to as a downlink direction.

  The intermediate communication device 30 adds the data input to the intermediate communication device 30 and sends it to the second communication device 20. The data input to the intermediate communication device 30 is, for example, image data of the other side camera 30a. For example, when the image data has a resolution of XGA and 30 frames / second, as described above, the image data from both side cameras 10a and 30a must be transmitted at a transmission speed of 556 Mbps or more. In the second communication device 20, the data from the first communication device 10 and the data from the intermediate communication device 30 are received and output to each node.

  Further, data input to the second communication device 20 (for example, control data such as on / off of both side cameras 10a and 30a) is transmitted in the downlink direction. Then, the intermediate communication device 30 takes out data related to the node connected to the intermediate communication device 30 (for example, data related to the control of the side camera 30a) and gives it to the node connected to the intermediate communication device 30. At the same time, the remaining data is further transmitted in the downlink direction, and the first communication apparatus 10 receives the remaining data (for example, data related to the control of the side camera 10a) and provides it to a predetermined node.

  FIG. 3 is a block diagram showing the communication system. In FIG. 3, a node group (side cameras 10a, 30a, etc.) connected to each communication device 10, 20, 30 generates and outputs data according to each standard, and accepts data according to each standard. ) Are shown as one functional block as each of the processing devices 51, 52, and 53.

  First, a configuration related to the uplink direction will be described.

  The first communication device 10 includes a plurality of input units 11a, 11b, and 11c, a serializer 12, and a transmission interface 13.

  Each input unit 11 a, 11 b, 11 c is connected to the processing device 51, receives data inputs output from the processing device 51 as different standards, and gives them to the serializer 12. Here, each data input to the input units 11a, 11b, and 11c is, for example, data output in a format according to each standard.

  The serializer 12 is an element that functions as a serial data generation unit that generates serial data based on a plurality of standard data input via the input units 11a, 11b, and 11c. , 11c, an IC (semiconductor integrated circuit) including a multiplexer and a multiplexer. The serializer 12 receives a synchronization clock signal from a synchronization circuit (not shown). The serializer 12 latches each data input via the input units 11a, 11b, and 11c in the device, and outputs the data continuously in a predetermined order, thereby determining the data in advance. Generate serial data of the specified array.

  For example, when data “A00”, “A01”, and “A02” are input from the input units 11a, 11b, and 11c, as shown in FIG. 4, serial data in which each of these data is serially arranged in time series Is generated. When no data is input to any of the input units 11a, 11b, and 11c, predetermined dummy data is inserted at a position where the data is to be inserted.

  The transmission interface 13 is an interface for outputting generated serial data to the outside. For example, based on a communication standard such as LVDS (low voltage differential communication), the transmission interface 13 transmits the serial data to the outside through a transmission path 40a. .

  The intermediate communication device 30 includes at least one (here, one) intermediate reception interface 31 as an intermediate reception unit, a serializer 32 as an intermediate serial data generation unit, and an intermediate transmission interface 33 as an intermediate transmission unit. And an input unit 34.

  The intermediate reception interface 31 receives serial data transmitted through the transmission path 40 a and provides the serial data to the serializer 32.

  A processing device 52 is connected to the intermediate input unit 34, and input data from the processing device 52 is given to the serializer 32 via the intermediate input unit 34. That is, the serializer 32 is supplied with serial data given from the first communication device 10 and input data of a predetermined standard from the processing device 52. In other words, the serializer 32 is provided with data according to different standards from the intermediate reception interface 31 and the intermediate input unit 34.

  The serializer 32 is realized by the same configuration as the serializer 12 described above, and serial data based on a plurality of standard data including serial data received by the intermediate reception interface and data input via the intermediate input unit 34. Is generated.

  For example, in the above example, if data “B00” is input to the intermediate input unit, serial data including “A00”, “A01”, “A02” and data “B00” are stored as shown in FIG. Serial data arranged in series is generated.

  The intermediate transmission interface 33 is an interface for outputting generated serial data to the outside. For example, based on a communication standard such as LVDS (low voltage differential communication), the intermediate transmission interface 33 sends the serial data to the outside through a transmission line 42a. To do.

  The second communication device 20 includes a reception interface 21 that receives serial data, deserializers 22 and 23 as standard data generation units, and a plurality of output units 24a, 24b, 24c, and 24d.

  The reception interface 21 receives the serial data transmitted through the transmission path 42 a and gives it to the deserializers 22 and 23.

  Each of the deserializers 22 and 23 is configured by an IC (semiconductor integrated circuit) including a demultiplexer and a latch circuit corresponding to each output. Then, the deserializers 22 and 23 generate serial data received by the reception interface 21 into data according to each standard.

  More specifically, serial data received by the reception interface 21 is first given to the deserializer 22. In the deserializer 22, processing reverse to that of the transmission source serializer 32, that is, the serial data received by the reception interface 21 is returned to a plurality of data according to the arranged order. In the above example, the input serial data is input via the intermediate input unit 34 with serial data (serial data including data “A00”, “A01”, “A02”) received by the intermediate reception interface 31. Return to data (data "B00").

  Then, the data (“B00” in the above example) input via the intermediate input unit 34 is given to the output unit 24a as it is. On the other hand, the serial data is given to the deserializer 23.

  In the deserializer 23, the data of each standard (“A00”, “A01”, “A02 in the above example”) is processed in the reverse order of the serializer 12 of the transmission source, that is, in the order in which the serial data given from the deserializer 22 is arranged. To each data).

  In this way, by sequentially performing deserialization processing opposite to the original serialization processing on the data serialized multiple times, each output unit of the second communication apparatus 20 Data according to the standard (“B00”, “A01”, “A02”, “A03” in the above example) is output via the output units 24 a, 24 b, 24 c, 24 d and provided to the processing device 52.

  Next, a configuration related to the downlink direction will be described.

  The second communication device 20 includes a plurality of input units 25a, 25b, and 25c, serializers 26 and 27 as serial data generation units, and a transmission interface 28.

  Each input unit 25 a, 25 b, 25 c is connected to the processing device 52, receives data input output from the processing device 52 as a different standard, and provides it to the serializer 26.

  The serializers 26 and 27 are realized by the same configuration as the serializer 12, and generate serial data based on data of a plurality of standards input via the input units 25a, 25b, and 25c.

  That is, the serializer 26 holds data of a plurality of standards input via the input units 25a and 25b, and outputs the data in a predetermined order so that serial data in a predetermined array is obtained. Is generated and given to the serializer 27.

  Subsequently, the serializer 27 holds the serial data input from the serializer 26 and the data input via the input unit 25c, and outputs the data in a predetermined order. Generate serial data for the array.

  As a result, data serialized multiple times is obtained.

  For example, when data “C00”, “C01”, and “D00” are input in parallel from the input units 25a, 25b, and 25c, the serializer 26 receives the data “C00” and “C01” as shown in FIG. Generate serial data arranged serially in series. Next, as shown in FIG. 5, the serializer 27 generates serial data in which the data shown in FIG. 4 and the data “D00” are serially arranged in time series. When no data is input to any of the input units 25a, 25b, 25c, predetermined dummy data is inserted at a position where the data is to be inserted.

  The transmission interface 28 is an interface for outputting the generated serial data to the outside. For example, based on a communication standard such as LVDS (low voltage differential communication), the transmission interface 28 transmits the serial data supplied from the serializer 27 to the transmission line 42b. To send to the outside.

  The intermediate communication device 30 includes an intermediate reception interface 36 as an intermediate reception unit, a deserializer 37 as an intermediate data generation unit, an intermediate transmission interface 39 as an intermediate transmission unit, and at least one (here, one) intermediate output. Part 38.

  The intermediate reception interface 36 receives serial data transmitted through the transmission path 42 b and provides the serial data to the deserializer 37.

  The deserializer 37 has the same configuration as that of the deserializer 22, and generates serial data received by the intermediate reception interface 36 as data corresponding to each standard.

  More specifically, the serial data received by the intermediate reception interface 36 is given to the deserializer 37, and the deserializer 37 performs processing opposite to that of the serializer 27, that is, serial data received by the intermediate reception interface 36. , Serial data including data serialized by the serializer 26 (in the above example, serial data including “C00” and “C01”) and data not serialized by the serializer 26 (in the above example) Then, the data is returned to the data "D00").

  Then, the latter data is provided to the intermediate output unit 38 and output to the processing device 53. On the other hand, the former serial data is given to the intermediate transmission interface 39.

  The intermediate transmission interface 39 is an interface for outputting generated serial data to the outside. For example, based on a communication standard such as LVDS (low voltage differential communication), the intermediate transmission interface 39 sends the serial data to the outside through a transmission line 40b. To do.

  The first communication device 10 includes a reception interface 15 that receives serial data, a deserializer 16 as a standard data generation unit, and a plurality of output units 17a and 17b.

  The reception interface 15 receives the serial data transmitted through the transmission path 40 b and gives it to the deserializer 16.

  The deserializer 16 has the same configuration as the deserializer 22 and generates serial data received by the reception interface 15 into data according to each standard.

  More specifically, the deserializer 22 performs processing opposite to that of the serializer 26, that is, serial data received by the reception interface 15 is converted into data according to each standard according to the arranged order (“C00” in the above example). , “C01”, and it is given to the output units 17a and 17b in parallel.

  As a result, data according to each standard is output from the output units 17 a and 17 b of the first communication device 10 and is provided to the processing device 52.

  As described above, since a plurality of serialization processes are first performed and the deserialization process is performed by the communication apparatuses 20 and 10, the data can be appropriately output from the communication apparatuses 20 and 10.

  According to the communication system configured as described above, the first communication device 10 generates serial data based on data of a plurality of standards, and transmits this to the second communication device 20. In the middle of the transmission path, the intermediate communication device 30 can add the data to the serial data and transmit it to the second communication device 20. As a result, data can be transmitted from a larger number of nodes connected to the first communication device 10 and the intermediate communication device 30 to the second communication device, and data can be transmitted from a larger number of nodes with fewer transmission paths. It can be sent.

  Further, the second communication device 20 generates serial data based on a plurality of standard data and transmits the serial data to the first communication device. On the way, the intermediate communication device 30 extracts the data included in the serial data and gives the data to the node connected to the intermediate communication device. As a result, data can be transmitted from the second communication device 20 to a larger number of nodes connected to the first communication device 10 and the intermediate communication device 30, and to a larger number of nodes with fewer transmission paths. To send data.

  In the above-described embodiment, a description has been given of a configuration using shielded twisted pair cables (STP) 40a, 40b or 42a, 42b as the transmission lines 40, 42, but this is not necessarily required. That is, as the transmission paths 40 and 42, a twisted pair cable, a coaxial cable, a metal wire such as a telecommunication cable, an optical fiber, a radio wave, or the like can be used.

  More specifically, as shown in FIG. 8, optical fibers 140a, 142a, 140b, and 142b may be used for bidirectional transmission paths. In this case, as the reception interfaces 160a and 162b, an interface having a light receiving element such as a photodiode and a transimpedance amplifier circuit and the like is used, and an optical signal is converted into an electric signal, and as the transmission interfaces 162a and 160b, light emission such as a laser diode is used. A circuit that includes an element, a driver circuit thereof, and the like and converts an electrical signal into an optical signal may be used.

  Alternatively, as shown in FIG. 9, each transmission path is composed of a single optical fiber 240, 242, and in each transmission path, a single optical fiber is used for bidirectional light in the uplink and downlink directions. A signal may be transmitted. In this case, it is preferable to transmit the optical signal by wavelength division multiplexing so that the wavelength of light is different in each direction. In this case, optical signals are appropriately branched or coupled using optical couplers 244 or the like at the ends of the optical fibers 240 and 242, and the optical signals are converted into electrical signals as the reception interfaces 260a and 262b as in FIG. A circuit that converts an electrical signal into an optical signal may be used as the transmission interfaces 262a and 260b.

  Furthermore, as shown in FIG. 10, optical fibers 340a and 342a may be used for one of the downlink transmission line and the uplink transmission line, and metal wires 340b and 342b such as a twisted pair cable may be used for the other. Good. In this case, as the interfaces 360a and 362a for transmitting and receiving signals to and from the metal wires 340b and 342b, those having the same configuration as the transmission interface 13 and the intermediate reception interface 31 are used, and optical signals to the optical fibers 340b and 342b are used. As the interfaces 360b and 362b for transmitting and receiving, similar to the interfaces 160a and 162a, etc., a conversion circuit that converts an optical signal into an electric signal or vice versa is used.

  In the case of the example shown in FIG. 10, for example, comparison including image data, audio data, and the like using optical fibers 340a and 340b for the transmission path for uplink and using metal wires 340b and 342b for the transmission path for downlink. It is preferable to use an optical fiber suitable for high-speed communication as a transmission line for transmitting a large amount of data.

  As described above, by using the optical fibers 340a and 340b as signal transmission paths through which a relatively large amount of data is transmitted, the large amount of data can be transmitted at a high speed, and a relatively small amount of data is transmitted. By using a metal cable as the road, the cable laying work in the vehicle can be easily performed.

  Of course, depending on the amount of data to be transmitted, an optical fiber and a metal cable may be selectively used in the middle of the uplink transmission path or the downlink transmission path. For example, when data is transmitted from the first communication device 10 to the intermediate communication device 30 using a metal cable and a large amount of data is added by the intermediate communication device 30, the intermediate communication device 30 performs the second communication. Data may be transmitted to the apparatus 20 via an optical fiber.

  Two or more intermediate communication devices 30 may be provided. In this case, a process for generating serial data in each intermediate communication device and a process for restoring the corresponding serial data on the downstream side, or a process for generating serial data on the upstream side of the data transmission path It is preferable that the serial data is returned to the forward dimension data in each intermediate communication device by performing the above-mentioned multiple times.

1 is an overall configuration diagram showing a communication system mounted on a vehicle. It is explanatory drawing which shows the flow of the data in a communication system. It is a block diagram which shows a communication system. It is a figure which shows the structural example of the serial data in an uplink direction. It is a figure which shows the other structural example of the serial data in an uplink direction. It is a figure which shows the structural example of the serial data in a downlink direction. It is a figure which shows the other structural example of the serial data in a downlink direction. It is a figure which shows the modification of the transmission line in a communication system. It is a figure which shows the other modification of the transmission line in a communication system. It is a figure which shows the further another modification of the transmission line in a communication system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 1st communication apparatus 11a, 11b, 11c Input part 12 Serializer 13 Transmission interface 15 Reception interface 16 Deserializer 17a, 17b Output part 20 2nd communication apparatus 21 Reception interface 22, 23 Deserializer 24a, 24b, 24c, 24d Output part 25a, 25b, 25c Input unit 26, 27 Serializer 28 Transmission interface 30 Intermediate communication device 31 Intermediate reception interface 32 Serializer 33 Intermediate transmission interface 34 Intermediate input unit 36 Intermediate reception interface 37 Deserializer 38 Intermediate transmission interface 39 Intermediate output unit 40, 42 Transmission Road

Claims (3)

A communication system in which at least one intermediate communication device is connected between a first communication device and a second communication device,
The first communication device latches a plurality of input units and data of a plurality of different communication standards input via the input units, and outputs them in a predetermined order. A serial data generation unit that generates serial data arranged in time series by, and a transmission unit that outputs the serial data generated by the serial data generation unit,
The intermediate communication device latches an intermediate reception unit that receives serial data, at least one intermediate input unit, serial data received by the intermediate reception unit, and data input through the intermediate input unit. The serial data generated by the intermediate serial data generating unit and the intermediate serial data generating unit that generates serial data arranged in time series by continuously outputting the data in a predetermined order. An intermediate transmission unit for outputting
The second communication device includes: a receiving unit that receives serial data; and the serial data received by the receiving unit is converted into serial data received by the intermediate receiving unit and data input via the intermediate input unit. A standard data generation unit for returning the serial data returned here to data of a plurality of different communication standards input via the input units, and a plurality of output units for outputting data corresponding to the communication standards And a communication system. A communication system in which at least one intermediate communication device is connected between a first communication device and a second communication device,
The second communication apparatus latches data of a plurality of different communication standards input via a plurality of input units and a part of the input units , and the predetermined data is predetermined. Generate serial data arranged serially in time series by continuously outputting in a predetermined order, and the generated serial data and data input via the other input units of the input units, A serial data generation unit that generates serial data arranged serially in time series by continuously outputting the data in a predetermined order, and the serial data generated by the serial data generation unit A transmission unit for outputting data,
The intermediate communication device includes an intermediate receiving unit that receives serial data, and an original communication standard that is input via another input unit among the input units based on the serial data received by the intermediate receiving unit. An intermediate data generation unit for returning data corresponding to the data and serial data generated based on a plurality of data of different communication standards input via some of the input units, and the intermediate data An intermediate output unit that outputs data according to the original communication standard generated by the generation unit, and an intermediate transmission unit that outputs serial data generated by the intermediate data generation unit,
The first communication device includes: a receiving unit that receives serial data; and serial data received by the receiving unit in accordance with each communication standard that is input via a part of the input units. A communication system comprising: a standard data generation unit that returns data according to the data; and a plurality of output units that output data according to each communication standard. A communication system combining the communication system according to claim 1 and the communication system according to claim 2,
An optical fiber is used as a signal transmission path through which a relatively large amount of data is transmitted.
A communication system using a metal cable as a signal transmission path through which a relatively small amount of data is transmitted.

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