DDC’s AFDX®/ARINC Part 7 Switch provides the key element of an AFDX network—the physical infrastructure to interconnect end systems and regulate. The AFDXEnd System Pro is certifiable to civil aerospace standards and enables safety-critical data transfer between a computer and an AFDX switch. 10// Mbit/s 24+1 port AFDX® switch for rapid system development of all technical functionalities of TTTech’s certifiable AFDX production switches.

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Therefore, in a network with multiple switches cascaded star topologythe total number of virtual links is nearly limitless. This page was last edited on 10 Novemberat In switdh abstraction, it is possible to visualise the VLs as an ARINC style network each with one source and one or more destinations. AFDX Switch A Pro This high-performance port switch is certifiable to civil aerospace standards and supports bandwidth-regulated traffic agdx and policing. This is the maximum rate data can be sent, and it is guaranteed to be sent at that interval.

It utilizes dedicated bandwidth-regulated traffic control while providing deterministic Quality of Service QoS. AFDX extends standard Ethernet to provide high data integrity and deterministic timing.

Multiple switches can be bridged together in a cascaded star topology. This ADN operates without the use of a bus controller thereby increasing the reliability of the network architecture.

However, total bandwidth cannot exceed the maximum available bandwidth on the network. AFDX was designed as the next-generation aircraft data network. There are two speeds of transmission: The switches are designed to route an incoming frame from one, and only one, end system to a predetermined set of end systems.

The drawback is that it requires custom hardware which can add significant cost to the aircraft. In case you wish to receive additional information, send an e-mail to products tttech. There can be one or more receiving end systems connected within each virtual link. 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.


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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. However, the number sub-VLs that may adx created in a single virtual link is limited to four. Innovating together for the A XWB”. However, some features of a real AFDX switch may be missing, such as traffic policing and redundancy functions. Data are read in a round-robin sequence among the virtual links with data to transmit.

Real-time solution on the A” PDF. Bi-directional communications must therefore require the specification of a complementary VL. The six primary aspects of an AFDX data network include full duplexredundancy, determinism, high speed performance, switched and profiled network. AFDX is a worldwide registered trademark by Airbus. Virtual links are unidirectional logic paths from the source end-system to all of the destination end-systems.

Avionics Full-Duplex Switched Ethernet

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

Archived from the original PDF on Retrieved May 28, 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.

Webarchive template wayback links CS1 maint: Additionally, there can be sub-virtual links sub-VLs that are designed to carry less critical data. In addition, AFDX can provide quality of service and dual link redundancy. 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. A data word consists of 32 bits communicated over a twisted pair switcu using the bipolar return-to-zero modulation.

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

This type of network can significantly reduce wire affx and, thus, the overall weight of the aircraft. 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.


AFDX Switch Lab This product provides the full range of technical functionalities of our certifiable production switches making it the optimal solution for various applications.

Airbus and Rockwell Collins: To get access to the document please fill in the following form. This product provides the full range of technical functionalities of our certifiable production switches making it the optimal solution for various applications.

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. 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.

By using this site, you agree to the Terms of Use and Privacy Policy. Basing on standards from the IEEE Office for Harmonization in the Internal Market. Views Read Edit View history. Archived copy as title All Wikipedia articles needing clarification Wikipedia articles needing clarification from September 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.

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

Avionics Full-Duplex Switched Ethernet (AFDX) – TTTech

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

Each VL afdd frozen in wwitch to ensure that the network has a designed maximum traffic, hence determinism. By clicking “Download” or “Download without registration” you agree to our Privacy Policy.