AbNET, a fault-tolerant fiber optic communication system
نویسندگان
چکیده
The design of a fiber optic communication net wol k originally intended for monitoring and control in power distribution systems is discusseci. }Iy appropriate choice of protocols, a fault-tolerant system can be built that operates in any arbitrary network configuration. The network, called AbNET, is a packet-bascfl distributed protocol sys(em. l:looding is used for maximum failure tolerance. Ilierarchica] (master-slave) polling controls access to the system. This suppor[s many data acquisition and corltrol applications. The protocols allow multiple adjacent masters to share resources. A service reports the network’s configuration to the master, where changes can be logged, and action taken if needed. The system is transparent to the user, and maintains no record of the clients it serves. It is fast enough for many industrial control applicatic~ns. Dec.ause hierarchical access control is used, peer-to-peer communications, such as for MMS systems, do not map WC1l into the protocols, but can be accomplished via software at the master station. (lnly a small number of fiber cables is needcxl for a high rc]iability systcm, In many industrial applications, where the inter-node distance is not large, fiber is un]ike]y to represent a large fraction of the system cost. Submitted to WFCS’95 IEEE International Workshop on Factory Communication Systems October 4-6, 1995 Ecole Polytechnique F6d6rale de Lausanne Switzerland Submission area: new protocols AbNET, a fault-tolerant fiber optic communication system Harold Kirkham and Eddie Hsu Jet Propulsion Laboratory California Institute of Technology Pasadena, California, USA
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تاریخ انتشار 1996