TRIPLE MODULAR REDUNDANCY APPROACH FOR INTERNET CONNECTIVITY

Abstract

This paper discusses the issue of providing tolerance to hardware and software faults in Internet system through triplicate application servers.  A replication scheme (TMR) is presented, and a detailed dependability analysis of this scheme is performed.  The proposed model was designed mainly for fault-tolerant Internet connectivity system where faults will not impair the continuous services rendered by the Internet system, thereby exhibiting highly varying and dynamic system characteristics.  A major feature of the model under consideration is to attempt the adaptive connections of the existing Triple Modular Redundancy (TMR) scheme for the execution of redundant modules for a required level of fault tolerance.