to expire the presence information issued from the presence server system and computer program product comprising instructions for performing the method medium , the system issuing the presence information to the presence server,

摘要

How to increase the computational efficiency of the presence server and network efficiency with the publication of the collection and the system provides The. Presence systems use a number of techniques that make it possible to provide rich presence information without requiring the costly processing. First, the presence system accepts the set of updates with a single presence update request issued. Similarly, the presence system accepts the set of subscription requests. Next, the presence system, and supports the new expiration type for the issued update request to eliminate the need for the user continuously refresh the published presence information that has not changed. Finally, the presence system allows the access list including a membership list of the group, not the individual user who wants to access a particular collection of presence.