TTEthernet switch
TTTech North America
Andover, MA

Radiation-tolerant Ethernet backbone ASICs, developed by Honeywell Aerospace and based on TTTech’s TTEthernet switch and end system chip IP cores, are ready for the first NASA Orion Multi-Purpose Crew Vehicle (MPCV) test flight later this year. The ASICs are core components of the Onboard Data Network (ODN) and enable the design of advanced integrated system architectures for human-rated spaceflight.

The ODN is a large, multi-hop, redundant backbone network used for communication among vehicle management, avionics, power data units, and other major systems in Orion’s MPCV. The ODN will also interface to Orion’s European Service Module (ESM).

The ASICs merge the core TTEthernet chip IP with Honeywell intellectual property to create a space radiation-hardened version of TTEthernet referred to as TT-GbE (Time-Triggered Gigabit Ethernet), which offers deterministic networking performance, gigabit bandwidth, and bandwidth partitioning for integrated architectures. TTTech provides compatible commercial off-the-shelf switches and network interface cards to the Orion program partner labs for integration, testing, verification, and simulation.

The Deterministic Ethernet network, based on Time-Triggered Ethernet, was selected by Lockheed Martin after several Orion architectural trade studies that evaluated approximately 30 different technologies and standards. The focus of those studies was on technology maturity, system cost, and size as well as weight and power (SWaP) optimization.

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NASA Tech Briefs Magazine

This article first appeared in the August, 2014 issue of NASA Tech Briefs Magazine.

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