International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada / NASA’s use of high bandwidth packetized Consultative Committee for Space Data
Systems (CCSDS) telemetry in future missions presents a great challenge to ground
data system developers. These missions, including the Earth Observing System
(EOS), call for high data rate interfaces and small packet sizes. Because each packet
requires a similar amount of protocol processing, high data rates and small packet
sizes dramatically increase the real-time workload on ground packet processing
systems.
NASA’s Goddard Space Flight Center has been developing packet processing
subsystems for more than twelve years. Implementations of these subsystems have
ranged from mini-computers to single-card VLSI multiprocessor subsystems. The
latter subsystem, known as the VLSI Packet Processor, was first deployed in 1991 for
use in support of the Solar Anomalous & Magnetospheric Particle Explorer
(SAMPEX) mission. An upgraded version of this VMEBus card, first deployed for
Space Station flight hardware verification, has demonstrated sustained throughput of
up to 50 Megabits per second and 15,000 packets per second. Future space missions
including EOS will require significantly higher data and packet rate performance. A
new approach to packet processing is under development that will not only increase
performance levels by at least a factor of six but also reduce subsystem replication
costs by a factor of five. This paper will discuss the development of a next generation
packet processing subsystem and the architectural changes necessary to achieve a
thirty-fold improvement in the performance/price of real-time packet processing.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/608429 |
| Date | 11 1900 |
| Creators | Dowling, Jason, Welling, John, Aerosys, Loral, Nanzetta, Kathy, Bennett, Toby, Shi, Jeff |
| Contributors | NASA |
| Publisher | International Foundation for Telemetering |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Proceedings |
| Rights | Copyright © International Foundation for Telemetering |
| Relation | http://www.telemetry.org/ |
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