Performance benefits of state-dependent routing of telephone traffic

The performance improvement that can be realized by changing from the current hierarchical routing scheme to a nonhierarchical state-dependent routing scheme is shown by means of call-by-call simulations in a 52 end-office metropolitan network model. The results show significantly lower blocking especially under load forecast errors and overloads, and better performance under facility failures owing to automatic network management, thus enhancing network survivability. It is noted that these benefits should become more valuable as the telephone operating companies install high-capacity fiber links, which enlarge the potential impact of failures in network elements.<
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