ISSN:
1573-1383
Keywords:
Interval-based external clock synchronization
;
GPS time distribution
;
fault-tolerant distributed real-time systems
;
COTS
;
M-Modules
;
Ethernet
;
experimental evaluation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Computer Science
Notes:
Abstract This paper provides a comprehensive overview of our Network Time Interface (NTI) M-Module, which facilitates high-accuracy time distribution in LAN-based distributed real-time systems. Built around our custom UTCSU VLSI chip, it hosts all the hardware support required for interval-based external clock synchronization: A high-resolution state- and rate-adjustable clock, local accuracy intervals, interfaces to GPS receivers, and various timestamping features. Maximum network controller and CPU independence ensures that the available NTI prototype can be employed in virtually any COTS-based system with MA-Module interface. Our experimental evaluation shows that time distribution with μs-accuracy is possible even in Ethernet-based system architectures, provided that the available configuration parameters are suitably chosen to cope with the various hidden sources of timing uncertainty.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008150426963
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