Title :
PADRE: a Protocol for Asymmetric Duplex REdundancy
Author :
Essame, D. ; Arlat, J. ; Powell, D.
Author_Institution :
Lab. d´´Autom. et d´´Anal. des Syst., CNRS, Toulouse, France
Abstract :
Safety and availability are issues of major importance in many critical systems. Simultaneously ensuring both attributes is sometimes difficult. Indeed, the introduction of redundancy to increase the overall system availability can lead to safety problems that would not otherwise exist. We present a protocol for duplex redundancy management in critical systems that aims to increase the system availability without jeopardizing its safety. An application to a fully automated train control system is described
Keywords :
fault tolerant computing; protocols; rail traffic; railways; redundancy; safety; traffic control; PADRE; Protocol for Asymmetric Duplex REdundancy; availability; critical systems; duplex redundancy management; fully automated train control system; redundancy; safety problems; system availability; Automatic control; Control systems; Degradation; Failure analysis; Fault tolerant systems; Protocols; Quality of service; Rail transportation; Railway safety; Redundancy;
Conference_Titel :
Dependable Computing for Critical Applications 7, 1999
Conference_Location :
San Jose, CA
Print_ISBN :
0-7695-0284-9
DOI :
10.1109/DCFTS.1999.814298
