Time-Triggered Ethernet (TTE)

Time-Triggered Ethernet / ARINC 664 Part 7 and AFDX^® / IEEE 802.3 Ethernet Deterministic Communications

Module TE1

Module TE1 is one of NAI's latest generation of advanced function modules. The TE1 is a single-port, tri-redundant, time sensitive networking, Ethernet communications interface module that supports three traffic classes: Time-Triggered Ethernet SAE AS6802 (TTEthernet™); ARINC 664 Part 7 and Avionics Full-Duplex Switched Ethernet (AFDX^®); or IEEE 802.3 Best-effort protocol. By supporting all three traffic classes, NAI's TE1 is the ideal solution for current users of IEEE 802.3 Ethernet, who plan to upgrade to Deterministic Ethernet ARINC 664 Part 7 and AFDX or TTE protocols in the future. Upgrade to either ARINC 664 Part 7 and AFDX or TTE support at any time without changing hardware.
 

The key feature of the TE1 module is the ability to support all three protocols as required with triple-redundancy. IEEE 802.3 Ethernet is ubiquitous and has been the standard for many years. It provides Best-effort data delivery, but does not provide any guarantee that the data was delivered or that the data was delivered in the sequence that it was sent. ARINC 664 Part 7 (AFDX) and TTE provide deterministic quality of service, which ensures that the data sent is received and in the same sequence that it was sent. The major features of ARINC 664 Part 7 (AFDX) and TTE are listed below.

ARINC 664 Part 7 and AFDX / TTE Comparison

	ARINC 664 Part 7 and AFDX	TTE
Transmission	Asynchronous	Synchronous
Jitter	Less than 500 µs	Less than 1 µs
Latency (typical)	1-10 ms	Less than 100 µs, at 12.5 µs/switch

Both ARINC 664 Part 7 (AFDX) and TTE provide time-critical, safety-critical data transmission and receipt sent through a single-port, tri-redundant Ethernet module that can be optimized for specific applications.

Features:

• Three modes of Ethernet operation: IEEE 802.3; ARINC 664 Part 7 and AFDX; SAE AS6802 TTE
• Single-port, tri-redundant Ethernet module that supports each protocol
• Supports 10/100/1000 Mbps Ethernet
• Currently supported on 75PPC1 (PPC P2041) with Wind River^® VxWorks^® 6.9 OS or DDC-I Deos™; 68G5 Pending

Specifications
Communications:	PCIe Gen II (5.0 Gbps) Endpoint
Protocols:	IEEE 802.3; ARINC 664 Part 7 and AFDX; SAE AS6802 TTEthernet
Ethernet Standards   IEEE 802.3	10BASE-T   100BASE-T   1000BASE-T

 

Document Downloads	Date
TE1 Datasheet	12/19/2017