IN A LTE-ADVANCED NETWORK A TARGET ENB SENDS A SOURCE ENB INFORMATION TO INDICATE TO THE UE WHICH OF MULTIPLE COMPONENT CARRIERS IS TO BE USED FOR INITAIL ACC

摘要

A target communications device receives from a source communications device a notification that a user communications device is to be handed over from that source device and provides the source device with multiple component carrier information for use by the user device. The information may comprise an index for each carrier, which may be exchanged with neighbouring devices during setup or updating of an X2 interface, and includes information indicating to the user device which of the carriers is to be used for initial access. Indexes are used for signalling purposes while at least one of configuring, activating and deactivating carriers. The notification from the source device may be a handover request (4) and the indication of which carrier is to be used for initial access may be provided in a handover request acknowledge (6) which may include a transparent container which may be sent to the user device as a RRC message (7).