Industrial Ethernet exchanger and message forwarding method based on EPA protocol

A switch, Ethernet technology, applied in the field of network switching, can solve the problems of immature research and development, no reliability, determinism, real-time and security, etc., to achieve high real-time, ensure reliability, and ensure security. Effect

Active Publication Date: 2010-01-20
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Such as EPA field devices, EPA network bridges, EPA gateways, etc., but the research and development of related products to ensure the high reliability, security, determinism and high real-time performance of the EPA network are still immature, in the initial stage, and there is no set System product equipment to ensure the reliability, determinism, real-time and security of communication between EPA field devices and EPA network segments

Method used

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  • Industrial Ethernet exchanger and message forwarding method based on EPA protocol
  • Industrial Ethernet exchanger and message forwarding method based on EPA protocol
  • Industrial Ethernet exchanger and message forwarding method based on EPA protocol

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Embodiment Construction

[0033] Preferred embodiments of the present invention will be described in detail below.

[0034] The industrial ethernet switch (hereinafter referred to as EPA switch) based on the EPA protocol of this embodiment, according to the characteristics of the EPA network itself, ensures the reliability, determinism, real-time and security of the communication between the EPA field device and the EPA network segment .

[0035] see figure 1 The hardware part of the EPA switch in this embodiment includes a CPU part 1, an Ethernet controller part 2, a power supply module 3, a storage part 4 and 8 RJ45 ports. Among them, the CPU part 1 uses a microcontroller model AT91R40008-ARM7TDMI to realize specific network interface functions and execute related control information; the Ethernet controller part 2 includes a MAC layer controller and a PHY layer controller, which are controlled by VT6512 and VT6108S respectively. The chip is mainly used for data information transmission of Ethernet...

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PUM

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Abstract

The invention provides an industrial Ethernet exchanger based on an EPA protocol, comprising an EPA message processing and forwarding module and an EPA message deterministic scheduling module, wherein the EPA message processing and forwarding module directly forwards the EPA network data messages of communication between EPA site equipment in the same subfield; the EPA message deterministic scheduling module divides the EPA network data messages of the communication between the EPA site equipment in different subfields into periodic EPA network data messages and nonperiodic EPA network data messages; and in one macro period, the periodic EPA network data messages and the nonperiodic EPA network data messages are respectively scheduled and forwarded, wherein the periodic EPA network data messages are transmitted in a fixed time slice, and the nonperiodic EPA network data messages are sequentially transmitted according to the priority in a nonperiodic time section. The invention also provides a message forwarding method of an industrial Ethernet based on an EPA protocol.

Description

technical field [0001] The invention belongs to the technical field of network switching, and in particular relates to an industrial Ethernet switch and a message forwarding method based on the EPA protocol. Background technique [0002] The EPA (Ethernet for plant automation Industrial Ethernet) network used in industrial measurement and control systems is a distributed system, which is defined by protocols such as ISO / IEC8802-3, IEEE802.11, and IEEE802.15. Several devices, small systems, and control / monitoring devices are connected so that all devices work together to complete measurement and control in industrial production processes and operations. [0003] Due to the characteristics of the EPA network itself, there are special requirements for the reliability of data transmission between field devices in the EPA network, the deterministic scheduling of messages, and security protection. With the promotion of the EPA standard, the EPA network is also becoming increasingl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L29/08H04L7/00H04L45/16H04L45/74H04L49/111
Inventor 王浩王平郑军孙朝阳黄术东涂朴
Owner CHONGQING UNIV OF POSTS & TELECOMM
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