AFDX defines the electrical and protocol specifications (IEEE and ARINC , Part 7) for the exchange of data between Avionics Subsystems. ARINC is based on Ethernet technology and components. ARINC is a specific implementation of ARINC Specification Part. 7. 3 and ARINC , Part 7) for the exchange of data be- tween Avionics Subsystems One thousand times faster than its predecessor, ARINC , it builds .

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AgustaWestland asserts its independence in the cockpit”. However, the number sub-VLs that may be created in a single virtual link is limited to four. Bi-directional communications must therefore require the specification of a complementary VL.

Airbus and Rockwell Collins: Many commercial aircraft use the ARINC standard developed in for safety-critical applications. This type parr network can significantly reduce wire runs and, thus, the overall weight of the aircraft.

Avionics Full-Duplex Switched Ethernet – Wikipedia

It specifies interoperable functional elements at the following OSI reference model layers:. Archived copy as title All Wikipedia articles needing clarification Wikipedia articles needing clarification from September However, total bandwidth cannot exceed aric maximum available bandwidth on the network.

Each VL is frozen in specification to ensure that the network psrt a designed maximum traffic, hence determinism. Ethernet family of local area network technologies. Office for Harmonization in the Internal Market. By using this site, you agree to the Terms of Use and Privacy Policy. Each switch has filtering, policing, and forwarding functions that should be able to process at least VLs.


Innovating together for the A XWB”. ARINC utilizes a unidirectional bus with a single transmitter and up to twenty receivers. AFDX is a worldwide registered trademark by Airbus.

The switch must also be non-blocking at the data rates that are specified by the system integrator, and in practice this may mean that the switch shall have a switching capacity that is the sum of all of its physical ports. From Wikipedia, the free encyclopedia. This is the maximum rate data can be sent, and it is guaranteed to be sent at that interval. However, some airnc of a real AFDX switch may be missing, such as traffic policing and redundancy functions.

Retrieved from ” https: Views Read Edit View history. The drawback is that it requires custom hardware which can add significant cost to the aircraft.

Speedgoat – ARINC Part 7 / AFDX protocol support with Simulink

AFDX was developed by Airbus Industries for the Ariinc, [3] initially to address real-time issues for flight-by-wire system development. Also the switch, having a VL configuration table loaded, can reject any erroneous data transmission that may otherwise swamp other branches of the network.

The virtual link ID is a bit unsigned integer value that follows a constant bit field. Additionally, there can be sub-virtual links sub-VLs that are designed to carry less critical data. Multiple switches can be bridged together in a cascaded star topology. Retrieved May 28, Archived from the original PDF on AFDX was designed as the next-generation aircraft data network. Through the use of twisted pair or fiber optic cables, full-duplex Ethernet uses two separate pairs or strands for transmitting and receiving the data.


Webarchive template wayback links CS1 maint: A similar implementation [ clarify ] of deterministic Ethernet is used on the Boeing Dreamliner. By adding key elements from ATM to those already found in Ethernet, and constraining the specification of various options, a highly reliable full-duplex deterministic network is created providing guaranteed bandwidth and quality of service QoS.

IO781: AFDX (ARINC 664 Part 7) I/O Module

The architecture adopted by AgustaWestland is centered around the AFDX data network developed for the latest commercial airliners. Further a redundant pair of networks is used to improve the system integrity although a virtual link may be configured to use one or the other network only.

The switches are designed oart route an incoming frame from one, and only one, end system to a predetermined set of end systems.

A data word consists of 32 bits communicated over a twisted pair cable using the bipolar return-to-zero modulation.