Avionics full duplex switched Ethernet (AFDX) protocol switching engine based on shared storage

A technology of sharing storage and switching engine, applied in the field of aviation communication network, to achieve the effect of high throughput

Active Publication Date: 2012-07-18
CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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Problems solved by technology

[0017]The switching engine generally has several design structures, one is a high-speed bus-based switching structure, the switch of this structure sends multiple input ports to the same output port data, it is easy to cause buffer overflow problem; the other is the switching structure based on the input queue, the switch of this structure has blocking problems, which affects the system throughput of the switch

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  • Avionics full duplex switched Ethernet (AFDX) protocol switching engine based on shared storage
  • Avionics full duplex switched Ethernet (AFDX) protocol switching engine based on shared storage
  • Avionics full duplex switched Ethernet (AFDX) protocol switching engine based on shared storage

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[0055] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0056] The invention is based on the characteristic analysis and simulation of the AFDX switch, and the AFDX protocol switch engine provided by the invention adopts a switch structure based on shared storage. The use of a shared storage-based switching structure in the AFDX switching engine has the following advantages:

[0057] 1) The shared memory structure has good support for multicast;

[0058] 2) The shared memory structure can guarantee deterministic delay;

[0059] 3) The shared memory structure supports the forwarding of variable-length packets;

[0060] 4) In the case of 10M / 100M bandwidth, the forwarding bandwidth requirement required by the shared memory structure can be met.

[0061] see figure 1 , the conventional shared memory-...

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Abstract

The invention discloses an avionics full duplex switched Ethernet (AFDX) protocol switching engine based on shared storage, which comprises a switching port, a shared storage exchange structure, a virtual link configuration table, a management information base (MIB) module, a global counter, a shared cache memory access interface and an exchange terminal interface. The switching engine can be widely used for researching and developing the existing avionics bus of a domestic military / civil aircraft, and is remarkable in market prospect and economic benefit.

Description

Technical field [0001] The invention involves aviation communication network technology, and specifically involves an AFDX protocol exchange engine. Background technique [0002] Avionic Full-Duplex Switched Ethernet (AFDX / ArIinc 664) is a certain aircraft data network bus used in the avionics system.Aviation full -duplex exchanges Ethernet use standard IEEE802.3 technology. The Ethernet hardware equipment, cables and testing equipment have been widely used and verified, thereby reducing the cost of aircraft data bus networks. [0003] According to the Arinc664 specification, the AFDX switch is mainly different from the commercial Ethernet switch: [0004] 1) Support single broadcast and broadcast based on virtual link (VL); [0005] 2) Support traffic control strategies based on virtual links; [0006] 3) Support two priority settings based on virtual links; [0007] 4) Support port -based data buffer space configuration; [0008] 5) The exchange process of the switch has a cer...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L47/20H04L47/6275
Inventor 高磊沈磊庄国万张效赢
Owner CHINESE AERONAUTICAL RADIO ELECTRONICS RES INST
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