Patent ID: 8301729

Claim:
A device for presence subscription delegation, the device comprising: a presence subscription delegation handler for receiving a presence subscription delegation request from a watcher and for performing delegation authorization for the presence subscription delegation request according to a presence delegation authorization rule of a delegating user being authorization information about presence subscription delegation, wherein the delegation authorization determines whether the delegating user has delegated authority of the presence subscription delegation request for a presence information about a presentity authorized to the delegating user to the watcher for requesting presence subscription on behalf of the delegating user, wherein the presence subscription delegation handler transmits the presence subscription delegation request to a presence server of a presentity, wherein the presence subscription delegation handler receives presence information about the presentity from the presence server after the presence server performs presence authorization according to a presence authorization rule of the presentity, wherein the presence subscription delegation handler transmits the presence information about the presentity to the watcher, wherein the presence subscription delegation request is transmitted from the watcher as a delegated user and the delegated user requests the presence information about the presentity on behalf of a delegating user, and wherein the delegating user sets the presence subscription delegation to the watcher.