How AFDX works?
In AFDX, a 16 bit value called a Virtual Link ID is used to route Ethernet frames in an AFDX network. The 100mbps link of an end system can support multiple virtual links . these virtual links can share the 100mbps bandwidth of the physical link. Each virtual link is assigned to parameters.
What is the transmission technique used in AFDX?
Unlike that of a traditional Ethernet switch which switches frames based on the Ethernet destination or MAC address, AFDX routes packets using a virtual link ID, which is carried in the same position in an AFDX frame as the MAC destination address in an Ethernet frame.
What is Arinc used for?
ACARS has become an airline standard and is used to track and record aircraft and aircrew flight and block time as well as cockpit crew to dispatcher digital communications, weather, weight and balance, real-time performance data and a variety of other critical and incidental flight data.
What does AFDX stand for in Ethernet Category?
In addition, AFDX can provide quality of service and dual link redundancy. AFDX adopted concepts such as the token bucket from the telecom standards, asynchronous transfer mode (ATM), to fix the shortcomings of IEEE 802.3 Ethernet.
Why are AFDX networks used in avionics systems?
AFDX extends standard Ethernet to provide high data integrity and deterministic timing. 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). It specifies interoperable functional elements at the following OSI reference model layers:
What kind of protocols are used in AFDX?
AFDX® communication protocols have been derived from commercial standards (IEEE802.3 Ethernet MAC addressing, Internet Protocol IP, User Datagram UDP) to achieve the required deterministic behavior for avionics applications.
Is the ARINC 664p7 standard based on AFDX?
ARINC 664P7 standard adopts the key elements from AFDX® to standardize a deterministic network for aircraft. AFDX® is used on the Airbus A380 as main Avionics databus and on the A400M. AFDX® is based on IEEE 802.3 Standard (commercial Ethernet using Wire) with either 10Mbits/s or 100Mbits/s.