Server, user equipment,notification system, method for controlling server, and method for controlling user equipment

摘要

A server (520) comprising: receiving means (706) for receiving, from User Equipment (510), location information which indicates a location of content to be monitored for updates is provided. The server (520) also comprises determination means (708) for periodically determining whether or not the content has been updated, and notification means (712) for notifying the User Equipment (510) via a SIP request message which indicates that the content has been updated.