A time simulation technique for determining the service availability (or unavailability) of end to and network connections (or paths) between source and sink nodes is disclosed. The method includes skips of (a) selecting a link between two network nodes; (b) performing a simulated link failure on the...http://www.google.co.uk/patents/US6836756?utm_source=gb-gplus-sharePatent US6836756 - Time simulation techniques to determine network availability