UNITE DE SERVEUR DE PRESENCE, PROCEDE DE COMMANDE D'UNE UNITE DE SERVEUR DE PRESENCE, DISPOSITIF DE COMMUNICATION ET PROCEDE D'EXPLOITATION D'UN DISPOSITIF DE COMMUNICATION.

摘要

A presence server unit, which manages presence information relating to the availability of a communication unit and informs a plurality of checking units about changes to the presence information on the basis of a notification ranking which is specified by priority information.