Signalling Optimisation In A Presence Service

摘要

A method of handling notifications associated with a presence service provided over a communications network and to which service a plurality of users are subscribed. The method comprises subscribing a first user to presence information of one or more peer users. In the event that a notification is sent from said network towards a first user, the notification containing presence information relating to the or at least one of said peer users, any failure to deliver said notification is detected and the notification sent one or more times.