Patent ID: 8024403
Filing Date: 2011-09-20
Classification: G06Q

Abstract:
1. A method comprising: identifying a critical time when a current presence state associated with a first client is scheduled to change to a timed presence state; generating a first presence document before the critical time, the first presence document being arranged to indicate the current presence state and the timed presence state; providing the first presence document to at least a second client, the first presence document being provided to the at least second client before the critical time, wherein providing the first presence document to the at least second client includes providing the first presence document to the at least second client in a first NOTIFY message; and generating at least a second presence document before the critical time; providing the at least second presence document to at least a third client in a second NOTIFY message; calculating a total number of NOTIFY messages to be provided, the total number of NOTIFY messages including the first NOTIFY message and the second NOTIFY message; and determining a number of seconds until the critical time, wherein providing the at least first presence document to the at least second client in the first NOTIFY message and providing the at least second presence document to the at least third client in the second NOTIFY message includes sending the at least first NOTIFY message and the at least second NOTIFY message at a rate calculated using the total number of NOTIFY messages to be provided and the number of seconds until the critical time.