A user is alerted to an expected occurrence of an event and automatically provided with a predetermined notice period of the expected occurrence of the event by identifying an event having an unreliable start time, but a start time that can be predicted more accurately as the time of the event approaches...http://www.google.fr/patents/US20030137435?utm_source=gb-gplus-shareBrevet US20030137435 - Alerting users to impending events
