A group of cells belonging to an MSC/VLR Service Area within which a paging message for a subscriber will be broadcast. An MS can move freely within an LA without having to update location information. The process of finding a Mobile Station. A group of cells belonging to an MSC/VLR Service Area within which a paging message for a subscriber will be broadcast. An MS can move freely within an LA without having to update location information. An MS roaming through the network must inform the network when it enters a new Location Area. A form of environmental attenuation of radio signals caused by the presence of buildings, hills, etc. Log normal fading is also known as shadowing.