Our ARINC Protocol Training covers the ARINC standard, its implementation, as well as comparisons with standard IEEE Ethernet. Hands‐on lab. The latest ARINC data bus specification is known as ARINC This bus standard is based on an Airbus Industries proprietary data bus known as AFDX. Avionics Full Duplex Ethernet and the Time Sensitive Networking Standard. 2. Topics. Presented by. SECTION 2. ✓ AFDX® Detailed.

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ARINC operates in such a way that its single transmitter communicates in a point-to-point connection, thus requiring a significant amount of wiring which amounts to added weight. Retrieved from ” https: Basing on standards from the IEEE Each switch has filtering, policing, and forwarding functions that should be able to process at least VLs.

Multiple switches can be bridged together in a cascaded star topology. However, the number sub-VLs that may be created in a single virtual link is limited to four.

This type of network can significantly reduce wire runs and, thus, the overall weight of the aircraft. There can be one or more receiving end systems connected within each virtual link.

In addition, AFDX can provide quality of service and dual link redundancy. 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.

This page was last edited on 10 Novemberat This ADN operates without the use of a bus controller thereby increasing the reliability of the network architecture. From Wikipedia, the free encyclopedia.

Retrieved May 28, There is no specified limit to the number of virtual links that can be handled by each end system, although this will be determined by the BAG rates and maximum frame size specified for each VL versus the Ethernet data rate.


Also the switch, having a VL configuration table loaded, can reject any erroneous data transmission that may otherwise swamp other branches of the network.

However, total bandwidth cannot exceed the maximum available bandwidth on the network. 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.


Additionally, there can be sub-virtual links sub-VLs that are designed to carry less critical data. Archived copy as title All Wikipedia articles needing clarification Wikipedia articles needing clarification from September There are two speeds of transmission: ARINC utilizes a unidirectional bus standardd a single transmitter and up to twenty receivers.

The network is designed in such a way that all critical traffic is prioritized using QoS policies so delivery, latency, and jitter are all guaranteed to be within set parameters.

The architecture adopted by AgustaWestland is centered around the AFDX data network developed for the latest commercial airliners. AFDX is a worldwide registered trademark by Airbus.

Avionics Full-Duplex Switched Ethernet

The stabdard primary aspects of an AFDX data network include full duplexredundancy, determinism, high speed performance, switched and profiled network. Office for Harmonization in the Internal Market. Each VL is frozen in specification to ensure that the network has a designed maximum traffic, hence determinism.

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

Virtual links are unidirectional logic paths from the source end-system to all of the destination end-systems. AFDX extends standard Ethernet to provide high data integrity and deterministic timing. The drawback is that it requires custom hardware which can add significant cost to the aircraft. In one abstraction, it is possible to visualise the VLs as an ARINC style network each with one source and one or more destinations.


AgustaWestland asserts its independence in the cockpit”. Bi-directional communications must therefore require the specification of a complementary VL. Innovating together for the A XWB”.

AFDX/ARINC Interface Chip – MEN

AFDX was developed by Airbus Industries for the A, [3] initially to address real-time issues for flight-by-wire system development. Data are read in a round-robin sequence among the virtual links with data to transmit. The virtual link ID is a bit unsigned integer value that follows a constant bit field. 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.

The switches are designed to route an incoming frame from one, and only one, end system to aronc predetermined set of end systems. Views Read Edit View history. Real-time solution on the A” PDF.

Avionics Full-Duplex Switched Ethernet – Wikipedia

Also sub-virtual links do not provide guaranteed bandwidth or latency due to the buffering, but AFDX specifies that latency is measured from the traffic regulator function anyway. A similar implementation [ clarify ] of deterministic Ethernet is used on the Boeing Dreamliner.

By using this site, you agree to the Terms of Use and Privacy Policy. Ethernet family of local area network technologies.