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Communication device, communication system and communication method

A technology of a communication device and a communication method, applied in the field of communication systems and communication devices, can solve the problems of complicated wiring and rising cost.

Inactive Publication Date: 2014-07-30
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not easy to select the communication data transmitted on only one bus
In order to realize this option, it is necessary to add another set of CAN bus and a circuit connected to the CAN bus, which will increase the cost and complicate the wiring.

Method used

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  • Communication device, communication system and communication method
  • Communication device, communication system and communication method
  • Communication device, communication system and communication method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0058] Figure 1 to Figure 9 A communication system including a communication device embodying the first embodiment of the present application will be described.

[0059] The communication system of the present embodiment is basically configured as a CAN (Control Area Network) communication network. On the other hand, this communication system is a communication system that performs communication based on so-called frequency division multiplexing. In order to increase the communication capacity, the communication standard of CAN is utilized, and the communication bus 21 that is a communication line is simultaneously used in different ways. The frequency band transmits multiple communication signals based on the CAN protocol.

[0060] figure 1 as well as figure 2 The outline of the communication system according to this embodiment will be described.

[0061] Such as figure 1 As shown, the vehicle 90 is equipped with a communication system as a network system for the veh...

no. 2 Embodiment approach

[0122] Figure 11 A second embodiment in which a communication system including the communication device of the present application is embodied will be described.

[0123] The communication system of this embodiment differs from the communication system of the first embodiment in that the first to twelfth ECUs 1 to 12 are all configured to be able to communicate in the first to third frequency bands F1 to F3, and on the other hand, no GW is provided. , and other configurations are the same, and therefore the same reference numerals are assigned to the same configurations, and detailed description thereof will be omitted.

[0124] The configurations of the first to twelfth ECUs 1 to 12 are the same as those of the GW 20 in the first embodiment. In the processing units 30 of the first to twelfth ECUs 1 to 12, the program for transfer processing provided in the processing unit 30 of the GW 20 in the first embodiment is not provided, but a program providing a predetermined contro...

no. 3 Embodiment approach

[0128] Figure 12 to Figure 16 A third embodiment in which a communication system including the communication device of the present application is embodied will be described.

[0129] The communication system of this embodiment differs from the communication system of the first embodiment in that a standard frequency band F10 based on CAN protocol signal changes is used instead of the first frequency band F1 of the first embodiment, and the configuration is the same except that, Therefore, the same reference numerals are assigned to the same components, and detailed description thereof will be omitted.

[0130] Figure 12 and Figure 13 The outline of the communication system will be described.

[0131] Such as Figure 12 As shown, the first to ninth ECUs 1a to 9a, the tenth to twelfth ECUs 10 to 12, and the GW20A are connected to the communication bus 21 of the communication system so as to be able to transmit and receive communication signals based on the CAN protocol. ...

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PUM

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Abstract

Provided is a communication device for readily increasing the communication capacity of communication data based on a given protocol, without increasing the number of wired connections. The communication device sends and receives communication data through a communication line (21). A communication section (60) sends a communication signal (TS1) of modulated communication data (S1) to the communication line (21). A receiving section (50) demodulates a communication signal (TR1) received from the communication line (21), to obtain communication data (R1). The communication section (60) modulates the communication data (S1) on the basis of a frequency that varies dynamically within a predetermined transmission frequency range (F1). The receiving section (50) demodulates the received modulated communication signal corresponding to the transmission frequency range (F1), to obtain the communication data (R1).

Description

technical field [0001] The present application relates to a communication device connected to a communication network, for example, a communication network mounted on a vehicle. The communication device communicates via a communication network. The present application relates to a communication system using a communication device, and also relates to a communication method for the communication device. Background technique [0002] As is well known, a plurality of electronic control units (ECUs) mounted on a vehicle are often connected to each other through a network to form a vehicle network system. information. One of the communication systems constituting such a vehicle network system is a control area network (CAN). CAN is a bus-type network that connects multiple nodes on a bus. For example, the specification of high-speed CAN is stipulated as: the transmission rate is 500kbps, the maximum bus length is 40m, and the maximum number of connected nodes is 16. However, ...

Claims

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Application Information

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IPC IPC(8): H04L27/02H04B3/50H04L12/413
CPCH04L12/40189H04L2012/40215H04B3/548H04B2203/5416H04B2203/547H04B2203/5408H04L5/06H04L5/1423H04L27/02H04L27/10
Inventor 后藤英树饭山真一安田孝高桥佳吾柴田伝幸
Owner TOYOTA JIDOSHA KK
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