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control device

A technology of a control device and a controller, which is applied to secure communication devices, data exchange through path configuration, bus network, etc., can solve problems such as time-consuming communication relays

Active Publication Date: 2021-10-22
HITACHI ASTEMO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case where the communication of the electronic control unit spans multiple networks, the relay of the communication is sometimes time-consuming, so that the rapid communication is required

Method used

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no. 1 Embodiment approach -

[0029] Below, refer to Figure 1 to Figure 11 , the first embodiment of the control device of the present invention will be described. The control unit is connected to at least 2 networks. In this embodiment, the description is made in the form of connection to six networks.

[0030] (hardware configuration)

[0031] figure 1 It is a hardware configuration diagram of the control device 1 . The control device 1 is connected to a plurality of networks, that is, six first to sixth networks. The six networks are, for example, CAN (Controller Area Network), TCP / IP, and LIN (Local Interconnect Network). However, the communication protocol used in each network is not limited to this, and MOST (Media Oriented System Transport) and FlexRay can also be connected. In addition, the communication protocol used in each network may be the same. In addition, the control device 1 may be connected to two to five networks, or may be connected to seven or more networks.

[0032] The contr...

Deformed example 1

[0078] In the first embodiment described above, a retransmission target flag is added to each frame stored in the MPFO buffer 11, and whether or not it is a retransmission target frame is determined based on the value of the flag. However, the management of the information indicating whether or not it is a retransmission object is not limited to this, and various methods can be used. For example, a table for managing retransmission target frames may be provided.

[0079] Figure 12 It is a diagram showing an example of the retransmission management table 18 for managing retransmission target frames. The retransmission management table 18 stores, for each frame ID, information indicating whether or not it is a retransmission target, for example, "Yes" or "No". Figure 12 The shown example shows the case where only the frame ID "10" is subject to retransmission. Reissue management table 18 in Figure 10 Write "Yes" in the processing in S340, in Figure 11 "No" is written in...

Deformed example 2

[0081] The routing control unit 10 may include a buffer sorting unit that deletes untransmitted frames that have passed a predetermined time or more since reception. Figure 13 It is a flowchart showing the operation of the buffer sorting unit. The buffer sorting unit is executed every predetermined time, for example, every 100 ms by Figure 13 Programs that demonstrate actions.

[0082] Figure 13 In S361, first, the buffer sorting unit judges whether or not a frame whose predetermined time or more has elapsed since reception is stored in the MPFO buffer 11 . When it is determined that the MPFO buffer 11 stores a frame whose reception has elapsed for a predetermined time or more, the buffer sorting unit proceeds to S362, and if it determines that there is no frame in the MPFO buffer 11 for which a predetermined time has elapsed since the reception. In the case of frames, end by Figure 13 Programs that demonstrate actions. In S362, the buffer sorting unit deletes the cor...

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Abstract

The present invention can realize transfer with less waiting time. The control device of the present invention includes a routing control unit, a transmission queue, and a plurality of controllers. The routing control unit includes: a buffer; The transmission queue of the corresponding controller, and when the controller corresponding to the transfer destination network is in a full state where no more frames can be stored in the transmission queue, the input frame is designated as a retransmission target frame and Stored in the buffer; and a signal handling part, when receiving a release signal indicating that the full state has been released from any one of the plurality of controllers, the signal handling part will use the control that sent the release signal The retransmission object frame corresponding to the network as the transfer destination is output to the transmission queue of the controller that sent the release signal, and when the full state is released, the controller sends the release signal to the signal handling unit.

Description

technical field [0001] The invention relates to a control device. Background technique [0002] A vehicle is equipped with a plurality of electronic control units, and each electronic control unit communicates via a network. In the case where the communication of the electronic control unit spans a plurality of networks, the relay of the communication may be time-consuming, and rapid communication is required. [0003] Patent Document 1 discloses a data relay device, which is connected to a plurality of multi-communication lines for transmitting data, outputs each data transmitted to each multi-communication line to other multi-communication lines, and includes: a receiving buffer set , which is composed of a plurality of buffers temporarily holding data received via the relay source multiplex communication line; the main buffer group, which is composed of a plurality of buffers that temporarily hold The device has transferred the data from the receiving buffer group, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/40H04L12/46H04L13/08H04L29/06H04L45/74H04L47/32
CPCH04L47/245H04L49/9084H04L9/40H04L49/90H04L45/745H04L1/08H04L47/24H04L47/32
Inventor 山本尚幸长田健一金子周平川口仁
Owner HITACHI ASTEMO LTD
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