In one embodiment the relative sizes are identified by a frequency layer and/or physical cell identity sent by a serving cell.

A device for configuring a cell identity is also provided corresponding to the above method in the present invention.

The invention discloses a method and apparatus for PCI allocation in a cellular network.

The second set of base station nodes share a cell identity and are deployed within a coverage area.

In another non-limiting example embodiment, a cell identity change message is sent by a base station changing its cell identity to one or more neighboring base stations.

In an aspect, frequency hopping may be performed based on both cell identity (ID) and system time information.

A mobile unit that is included in the first list and its ability to communicate with the monitoring unit is identified by virtue of its serving cell identity referring to a net cell which, according to the second list, is out of function.

Reference signals comprising reference symbols corresponding to a physical cell identity are sent from said radio base stations to said user equipments over a radio interface.

The user equipments are arranged to detect if any other radio base station is sending reference symbols corresponding to the same physical cell identity during the transmission gaps.

A terminal acquires a first physical cell identity (PCI) for a first downlink component carrier, and acquires an expanded PCI for a second downlink component carrier.

In one non-limiting example embodiment, a cell identity change message is sent by a base station to one or more UEs being served in that base station.