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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Bi-directional communications must therefore require the specification of a complementary VL. Office for Harmonization in the Internal Market. Virtual links are unidirectional logic paths from the source end-system to all of the destination end-systems. By using this site, you agree to the Terms of Use and Privacy Policy. Ethernet family of local area network technologies.

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

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. Many commercial aircraft use the ARINC standard developed in for safety-critical applications. From Wikipedia, the free encyclopedia. ARINC utilizes a unidirectional bus with a single transmitter and up to twenty receivers. Avionics Full-Duplex Switched Ethernet AFDX is a data network, patented by international aircraft manufacturer Airbus[1] for safety-critical aribc that utilizes dedicated bandwidth while providing deterministic quality of service QoS.

Airbus and Rockwell Collins: AgustaWestland asserts its independence in the cockpit”.

Avionics Full-Duplex Switched Ethernet

This type of network can significantly reduce wire runs and, thus, the overall weight of the aircraft. Multiple switches can be bridged together aarinc a cascaded star topology. However, some features of a real AFDX switch may be missing, such as traffic policing and redundancy functions. Therefore, in a network with multiple switches cascaded star topologythe total number of virtual links is nearly limitless. Additionally, there can be sub-virtual links sub-VLs that are designed to carry less critical data.


Arind ADN operates without the use of a bus controller zrinc increasing the reliability of the network architecture. Archived copy as title All Wikipedia articles needing clarification Wikipedia articles needing clarification from September Real-time solution on the A” PDF. 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. Retrieved May 28, There are two speeds of transmission: Further a redundant pair of networks is used to improve the system integrity although a virtual zrinc may be configured to use one or the other network only.

AFDX was designed as the next-generation aircraft data network.

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. Sub-virtual links are assigned to a particular virtual link.

Each VL is frozen in specification to ensure that the network has a designed maximum traffic, hence determinism. There can be one or more receiving end systems connected within each virtual link. AFDX is a worldwide registered trademark by Airbus.

The architecture adopted by AgustaWestland is centered around the AFDX data network developed for the latest commercial airliners. This page was last edited on 10 Novemberat Retrieved from ” https: A data word consists of 32 bits communicated over a twisted pair cable using the bipolar return-to-zero modulation.

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 arnc.

Each switch has filtering, policing, and forwarding functions that should be able to process at least VLs.

Views Read Edit View history. However, the number sub-VLs that may be created in a single virtual link is limited to four. 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. The drawback is that it requires custom hardware which can add significant cost to the aircraft. Innovating together for the A XWB”. Webarchive template wayback links CS1 maint: 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.


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

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. Archived from the original PDF on Data are read in a round-robin sequence among the virtual links with data to transmit.

There is no aginc 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. The switches are designed to route an incoming frame from one, and only one, end system to a predetermined set of end systems.

This is the maximum rate data can be sent, and atinc is guaranteed to be sent at that interval.