CN110933527A

CN110933527A - Vehicle-mounted 8-port exchanger

Info

Publication number: CN110933527A
Application number: CN201911277318.3A
Authority: CN
Inventors: 刘晨曦; 杜振环; 席赫
Original assignee: CRRC Dalian R&D Co Ltd
Current assignee: CRRC Dalian R&D Co Ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-03-27
Anticipated expiration: 2039-12-12
Also published as: CN110933527B; WO2021114641A1

Abstract

The invention provides a vehicle-mounted 8-port exchanger, which comprises: the system comprises a switch circuit, a switch mode configuration circuit, an Ethernet interface expansion circuit, an Ethernet backboard interface 3-8 circuit, an Ethernet front panel interface 3-8 circuit, an Ethernet interface 1-8 communication state indicator lamp circuit, an Ethernet front panel interface 1/2 circuit and a power supply circuit; the switch mode configuration circuit is used for configuring the working mode of the switch, and the working mode comprises an adaptive mode configuration and an auto-negotiation mode configuration; the Ethernet interface expansion circuit is used for expanding 6-path Ethernet interface to the Ethernet communication of the back plate or the front plate. The invention effectively solves the problem of Ethernet communication between vehicle-mounted devices, and provides a stable, reliable and low-cost solution for Ethernet data exchange and vehicle control between the devices.

Description

Vehicle-mounted 8-port exchanger

Technical Field

The invention relates to the technical field of switches, in particular to a vehicle-mounted 8-port switch.

Background

In China, urban rail transit trains generally adopt a form that Ethernet running through the whole train and a traditional train communication network coexist and are relatively independent. The industrial Ethernet technology is applied to the train communication network and has the characteristics of high communication rate, good compatibility, strong resource sharing capability and great sustainable development potential. A certain type of domestic tramcar applies Canopen and Ethernet parallel networks, when a vehicle runs, Ethernet communication is preferentially used, and the Canopen network is used as an Ethernet redundant line, so that the communication stability of the vehicle is improved. The Ethernet communication between the devices in the vehicle is completed through the switch, and the invention describes a switch which can be simultaneously connected with 8 Ethernet devices and adopts a CSMA/CD medium access control mechanism to support 10/100M self-adaption.

Disclosure of Invention

In light of the technical problems set forth above, a vehicle-mounted 8-port exchanger is provided. The invention mainly utilizes a vehicle-mounted 8-port exchanger, which is characterized by comprising the following components: the switch comprises a switch circuit, a switch mode configuration circuit, an Ethernet interface expansion circuit, an Ethernet backboard interface 3-8 circuit, an Ethernet front panel interface 3-8 circuit, an Ethernet interface 1-8 communication state indicator lamp circuit, an Ethernet front panel interface 1/2 circuit and a power supply circuit.

Further, the switch mode configuration circuit is configured to configure an operation mode of the switch, where the operation mode includes an adaptive mode configuration and an auto-negotiation mode configuration; the Ethernet interface expansion circuit is used for expanding 6 paths of Ethernet interfaces of the back panel to front panel Ethernet communication.

Furthermore, the switch is 8 10/100M Ethernet physical layer transceivers in an 8-port integrated switch mode, and the switch is a non-network management type device and adopts a KSZ8999 model chip.

Further, the switch supports the 10BaseT, 100BaseT, and 100BaseFX transmission modes specified by IEEE 802.3; the frame buffer is 128 kbytes, 2.0Gbps stores bandwidth, 1K MAC address table.

Furthermore, the switch adopts a 3U4TE structure board card, is simultaneously connected with 8 Ethernet devices, and has a front panel M12 interface, supports 2-path Ethernet communication, and can be expanded to 8 paths at most according to actual needs; the backplane is powered by 5V, and is protected from overload and reverse connection, and the backplane supports 6 paths of Ethernet communication.

Furthermore, the working temperature of the exchanger is-40 ℃ to +85 ℃.

Further, the exchanger storage temperature is-40 ℃ to +85 ℃.

Compared with the prior art, the invention has the following advantages:

the invention effectively solves the problem of Ethernet communication between vehicle-mounted devices, and provides a stable, reliable and low-cost solution for Ethernet data exchange and vehicle control between the devices.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a functional block diagram of a switch of the present invention.

Fig. 2 is a schematic diagram of the switch of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1-2, an on-vehicle 8-port exchanger includes: switch circuitry, switch mode configuration circuitry, ethernet interface extension circuitry, ethernet backplane interface 3-8 circuitry, ethernet front panel interface 3-8 circuitry, ethernet interface 1-8 communication status indicator light circuitry, ethernet front panel interface 1/2 circuitry, and power supply circuitry, as shown in fig. 1. Preferably, in the present application, the interface of the device includes an ethernet front panel interface circuit, an ethernet backplane interface circuit, and an expansion interface circuit. The Ethernet interface circuit is used for connecting Ethernet communication of external equipment, and the expansion interface circuit is used for Ethernet interface expansion.

As a preferred embodiment, in the present application, the switch mode configuration circuit is configured to configure an operation mode of the switch, where the operation mode includes an adaptive mode configuration and an auto-negotiation mode configuration; the Ethernet interface expansion circuit is used for expanding the 6-path Ethernet interface of the back panel to the front panel Ethernet communication.

As an embodiment of the present application, the switch has 8 10/100M ethernet physical layer transceivers in an 8-port integrated switch mode, and the switch is a non-network management type device and adopts a KSZ8999 model chip.

As shown in fig. 2, is a general block diagram, among which

1) The signal is defined as:

LINK _ ACK [8..1 ]: the switches 1 to 8 ACK lamp signal groups (including LINK _ ACK1, LINK _ ACK2, LINK _ ACK3, LINK _ ACK4, LINK _ ACK5, LINK _ ACK6, LINK _ ACK7, LINK _ ACK8 signals);

ETH _ SW: switch 1 to 8 port ethernet signal groups (including ETH1_ RX _ P, ETH1_ RX _ N, ETH1_ TX _ P, ETH1_ TX _ N, ETH2_ RX _ P, ETH2_ RX _ N, ETH2_ TX _ P, ETH2_ TX _ N, ETH3_ RX _ P, ETH3_ RX _ N, ETH3_ TX _ P, ETH3_ TX _ N, ETH4_ RX _ P, ETH4_ RX _ N, ETH4_ TX _ P, ETH4_ TX _ N, ETH5_ RX _ P, ETH5_ RX _ N, ETH5_ TX _ P, ETH5_ TX _ N, ETH6_ RX _ P, ETH6_ RX _ N, ETH6_ TX _ P, ETH6_ TX _ N, ETH7_ RX _ P, ETH7_ N, ETH7_ TX _ P, ETH7_ TX _ N, ETH8_ RX _ P, ETH8_ RX _ N, ETH8_ TX _ P, ETH8_ TX _ N signals);

EXT _ ETH: switch expanded ethernet signal groups (including EXT _ ETH2_ RX _ P, EXT _ ETH2_ RX _ N, EXT _ ETH2_ TX _ P, EXT _ ETH2_ TX _ N, EXT _ ETH3_ RX _ P, EXT _ ETH3_ RX _ N, EXT _ ETH3_ TX _ P, EXT _ ETH3_ TX _ N, EXT _ ETH4_ RX _ P, EXT _ ETH4_ RX _ N, EXT _ ETH4_ TX _ P, EXT _ ETH4_ TX _ N, EXT _ ETH5_ RX _ P, EXT _ ETH5_ RX _ N, EXT _ ETH5_ TX _ P, EXT _ ETH5_ TX _ N signals);

ETH _ BP: a switch backplane ethernet signal group (including ETH _ RX1_ P, ETH _ RX1_ N, ETH _ TX1_ P, ETH _ TX P, ETH _ P, ETH _ RX P, ETH _ P, ETH _ TX P, ETH _ P, ETH _ TX P, ETH _ P, ETH _ TX P, ETH _ P, ETH _ N signals).

Furthermore, the working temperature of the exchanger is-40 ℃ to +85 ℃.

Further, the exchanger storage temperature is-40 ℃ to +85 ℃.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An on-vehicle 8 mouthful switch characterized in that includes: the system comprises a switch circuit, a switch mode configuration circuit, an Ethernet interface expansion circuit, an Ethernet backboard interface 3-8 circuit, an Ethernet front panel interface 3-8 circuit, an Ethernet interface 1-8 communication state indicator lamp circuit, an Ethernet front panel interface 1/2 circuit and a power supply circuit;

the switch mode configuration circuit is used for configuring the working mode of the switch, and the working mode comprises an adaptive mode configuration and an auto-negotiation mode configuration; the Ethernet interface expansion circuit is used for expanding 6-path Ethernet interface to the Ethernet communication of the back plate or the front plate.

2. The vehicle-mounted 8-port switch according to claim 1, wherein the switch is an 8-port integrated switch mode with 8 10/100M ethernet physical layer transceivers, and the switch is a non-network management type device using a KSZ8999 model chip.

3. The vehicle-mounted 8-port switch according to claim 1, wherein the switch supports 10BaseT, 100BaseT and 100BaseFX transmission modes specified by IEEE 802.3; the frame buffer is 128 kbytes, 2.0Gbps stores bandwidth, 1K MAC address table.

4. The vehicle-mounted 8-port switch according to claim 1, wherein the switch adopts a 3U4TE board, is simultaneously connected with 8 ethernet devices, and has a front panel M12 interface, supports 2-path ethernet communication, and can be expanded to 8 paths at most according to actual needs; the backplane is powered by 5V, and is protected from overload and reverse connection, and the backplane supports 6 paths of Ethernet communication.

5. The vehicle-mounted 8-port switch according to claim 1, wherein the switch operating temperature is-40 ℃ to +85 ℃.

6. The vehicle-mounted 8-port switch according to claim 1, wherein the switch storage temperature is-40 ℃ to +85 ℃.