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An overview of SAFENET and its implications for aerospace applicationsThe survivable, adaptable fiber optic embeddable network (SAFENET) is a draft standard for local area networking (LAN) developed by the Navy which, when adopted, will become a military standard. The standard is being developed for procurement specifications of computer resources to be used on ships and aircraft and has some of the real-time concerns that network standards for space vehicles have. Architecture and survivability are considered. It is noted that the token-ring LAN must implement the IEEE 802.5 recommended practice for dual ring reconfiguration, which is currently being reviewed for inclusion into the IEEE standard. A trunk coupling unit is used at each station to isolate a station from the ring in case of failure. Up to five stations can be bypassed in this fashion. Communication architecture has an OSI profile but differs from the standard concept of the seven layers by allowing alternate suits and breaking the layers into three groupings of services to allow for physical interfacing. It also provides several paths, even if only one profile is used. Management and synchronization protocols are discussed and security issues are addressed. Implications for aerospace applications are considered and it is projected that interoperability with the Navy and other U.S. Government systems may require SAFENET specifications for NASA systems.
Document ID
19910016326
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Collins, George C. (Research Inst. for Computing and Information Systems Houston, TX, United States)
Bown, Rodney L. (Research Inst. for Computing and Information Systems Houston, TX, United States)
Date Acquired
September 6, 2013
Publication Date
February 1, 1991
Subject Category
Computer Programming And Software
Report/Patent Number
NAS 1.26:188585
NASA-CR-188585
Accession Number
91N25640
Funding Number(s)
CONTRACT_GRANT: NCC9-16
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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