Master Failure Detection Protocol in Internal Synchronization Environment

摘要: During the last decades, wide advance in networking technologies has allowed development of distributed monitoring and control systems. These systems show advantages compared with centralized solutions: heterogeneous nodes can be easily integrated, new added to system, no single point failure. For these reasons, have been adopted different fields, such as industrial automation telecommunication Recently, due technology improvements, are also power-grid transport systems, i.e., so-called large-scale complex critical infrastructures. Given strict safety, security, reliability, real-time requirements, using for controlling infrastructure demands that adequate mechanisms established share same notion time among nodes. this class a synchronization protocol, IEEE 1588 standard, adopted. This type protocol was designed achieve very precise clock synchronization, but it may not sufficient ensure safety entire system. example, instability local oscillator reference node, failure node itself or malicious attacks, could influence quality all In recent years, software clock, reliable self-aware (R&SAClock), which is estimate through statistical analysis, developed tested. instrument used identify any anomalous conditions respect normal behavior. A careful analysis classification main points standard suggests called master, weak reason, paper deals detection faults node(s) an setup. describes evaluates design timing internal based on revised version R&SAClock suitably modified cross-exploit information The experimental evaluation approach confirms capability uncertainty, provided by R&SAClock, reveal behaviors either node. fact, shown that, proper configuration parameters system able detect failures injected master correctly slaves probability 87%.