Techniques for identifying base stations in communication system

A Mobile Station (MS) for use in a wireless communication network comprising a plurality of Base Stations (BSs) capable of communicating with the MS and other MSs, wherein at least some of the BSs are Femtocell BSs (FBSs) and at least some of the BSs are Macrocell BSs (MBSs), the MS comprising:

• a receiver for receiving signals from at least one of the BSs;
• a transmitter for transmitting signals to at least one of the BSs;
• and
• a controller for controlling to receiver at least one of a globally unique BS ID and an Operator ID from an FBS via a Broadcast CHannel (BCH), for controlling to derive a Closed Subscriber Group IDentifier (CSG ID) from the received at least one of the globally unique BS ID and the Operator ID, and for controlling to determine, based on the derived CSG ID, if the FBS is a CSG FBS to which the MS is subscribed.