METHOD AND APPARATUS FOR UPDATING A PRESENCE ATTRIBUTE

摘要

A Presence Server (120) receives presence information associated with a Presentity and comprising one or more presence attributes. The Presentity is associated with a Presence User (102), a Presence Source (106), and a first Watcher (108). The Presence Server also receives a request from a second Watcher (114) to view a presence attribute of the one or more presence attributes, and further may receive a message from the first Watcher specifying a desire to be notified of who is watching the Presentity, presence attributes being filtered, and/or throttling or deferring of presence attribute updates implemented by the Presence Server. The Presence Server conveys to the first Watcher watcher notification information that informs of Watchers watching the Presentity, what is being watched, presence attributes being filtered, and/or throttling or deferring of presence attribute updates. The Presentity then determines whether to publish a presence attribute update based on the watcher notification information.