| 摘要 |
FIELD: information technology. ^ SUBSTANCE: presence system uses several techniques which enable a presence server to provide rich presence information without requiring expensive processing. First, the presence system accepts batches of publication updates in a single presence update request. Similarly, the presence system accepts batches of subscription requests. Further, the presence system supports new expiration types for publication update requests which eliminate the need for a publishing user to continually refresh presence information that has not changed. Finally, the presence system accepts access lists containing membership groups rather than an individual list of users that are to have access to a particular presence collection. ^ EFFECT: high computational and network efficiency of presence servers having publication collections. ^ 14 cl, 8 dwg |
