ARINC PART 7. Product Overview. Avionics Interface Technologies. N. th Street. Omaha, NE Tel: +1 Fax: +1 AIT’s ARINC test instruments can be used in test and simulation applications that are required to transmit and receive data over the ARINC avionics. Introduction. “Avionic Full-Duplex Switched Ethernet” (AFDX), designated. ARINC , is a specification for a deterministic aircraft data network bus for.

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The drawback is that it requires custom hardware which can add significant cost to the aircraft. Webarchive template wayback links CS1 maint: However, total bandwidth cannot exceed the maximum available arinv on the network.


This is the maximum rate data can be sent, and it is guaranteed to be sent at that interval. Office for Harmonization in the Internal Market. Ethernet family of local area network technologies. 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 A data word consists of 32 bits communicated over a twisted pair cable using the bipolar return-to-zero modulation.

AFDX / ARINC Bus Topology

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. Many commercial aircraft use the ARINC standard developed in for safety-critical applications.


Each virtual link is allocated dedicated bandwidth [sum of all VL bandwidth allocation gap BAG rates x MTU] with the total amount of bandwidth defined by the system integrator. From Wikipedia, the free encyclopedia.

AFDX was developed by Airbus Industries for the A, [3] initially to address real-time issues for flight-by-wire system development.

Airbus and Rockwell Collins: However, some features of a real AFDX switch may be missing, such as traffic policing and redundancy functions. Each switch has filtering, policing, and forwarding functions that should be able to process at least VLs.

Data are read in a round-robin sequence among the virtual links with data to transmit. Retrieved May 28, However, the number sub-VLs that may be created in a single virtual link is limited to four.

Each VL is frozen in specification to ensure that the network has a designed maximum traffic, hence determinism. 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.

Multiple switches can be bridged together in a cascaded star topology.

Avionics Full-Duplex Switched Ethernet

Archived copy as title All Wikipedia articles needing clarification Wikipedia articles needing clarification from September Through the use of twisted pair or fiber optic cables, arlnc Ethernet uses two separate pairs or strands for transmitting and receiving the data. Also the switch, having a VL configuration table loaded, can reject any erroneous data transmission that may otherwise swamp other branches of the network.


It specifies interoperable functional elements at the following OSI reference model layers:.

AFDX is a worldwide registered trademark by Airbus. Bi-directional communications must therefore require the specification of a complementary VL.

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. The six primary aspects of an AFDX data network include full duplexredundancy, determinism, high speed performance, switched and profiled network.

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. There are two speeds of transmission: AFDX was designed as the next-generation aircraft data network. Basing on standards from the IEEE This ADN operates without the use of a bus controller thereby increasing the reliability of the network architecture.