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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Many 664 aircraft use the 66 standard developed in for safety-critical applications. Avionics Full-Duplex Switched Ethernet AFDX is a data network, patented by international aircraft manufacturer Airbus[1] for safety-critical applications that utilizes dedicated bandwidth while providing deterministic quality of service QoS.

Views Read Edit View history. This ADN operates without the use of a bus controller thereby increasing the reliability of the network architecture. In one abstraction, it is possible to visualise the VLs as an ARINC style network each with one source and one or more destinations.

However, the number sub-VLs that may be created in a single virtual link is limited to four. AgustaWestland asserts its independence in the cockpit”. Each VL is frozen in specification to ensure that the network has a designed maximum traffic, hence determinism.

By adding rainc 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. This is the maximum rate data can be sent, and it is guaranteed to be sent at that airnc.

Innovating together for the A XWB”. ARINC operates in such a way that its ainc transmitter communicates in a point-to-point connection, thus requiring a aeinc amount of wiring which amounts to added weight.

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 architecture adopted by AgustaWestland is centered around the AFDX data network developed for the latest commercial airliners. AFDX extends standard Ethernet to provide high data integrity and deterministic timing.


Avionics Full-Duplex Switched Ethernet

AFDX was developed by Airbus Industries for the A, [3] initially arinv address real-time issues for flight-by-wire system development. AFDX is a worldwide registered trademark by Airbus.

The switch must also be non-blocking at the data rates that ariinc specified by the system integrator, and in practice this may mean that the switch shall have a switching capacity that is arihc sum of all of its physical ports. The six primary aspects of an AFDX data network include full duplexredundancy, determinism, high speed performance, switched and profiled network.

Real-time solution on the A” PDF. AFDX was designed as the next-generation aircraft data network. A data word consists of 32 bits communicated over a twisted pair cable using the bipolar return-to-zero 646.

Further a redundant pair of networks is used to improve 646 system integrity although a virtual link may be configured to use one or the other network only. 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.

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. However, total bandwidth cannot exceed the maximum available bandwidth on the network. Airbus and Rockwell Collins: Archived copy as title All Wikipedia articles needing clarification Wikipedia articles needing clarification from September From Wikipedia, arrinc free encyclopedia.

Multiple switches can be afinc together in a cascaded star topology. Retrieved May 28, Retrieved from ” https: The drawback is that it requires custom hardware which can add significant cost to the aircraft. 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. Virtual links are unidirectional logic paths from the source end-system to all of the destination end-systems.


The virtual link ID is a bit unsigned integer value that follows a constant bit field.

In addition, AFDX can provide quality of service and dual link redundancy. There are two speeds of transmission: 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.

Additionally, there can be sub-virtual links sub-VLs that are designed to carry less critical data. 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.

Bi-directional communications must therefore require the specification of a complementary VL. Data are read in a round-robin sequence among the virtual links with data to transmit. This type of network can significantly reduce wire runs and, thus, the overall weight of the aircraft.

ARINC Test Instruments | A/AFDX Products | Aircraft Data Networks

Basing on standards from the IEEE Archived from the original PDF on Each switch has filtering, policing, and forwarding functions that should be able to process at least VLs. Ethernet family of local area network technologies.

There can be one or more receiving end systems connected within each virtual link. Office for Harmonization in the Internal Market. By using this site, you agree to the Terms of Use and Privacy Policy. Therefore, in a network with multiple switches cascaded star topologythe total number of virtual links is nearly limitless. ARINC utilizes a unidirectional bus with a single transmitter and up to twenty receivers.

The switches are designed to route an incoming frame from one, and only one, end system to a predetermined set of end systems. 6664 specifies interoperable functional elements at the following OSI reference model layers:.