Cellular communications network including subscriber interrogation points.

摘要

A cellular radio communications network has a plurality of mobile switching centers each having a plurality of base stations with which a mobile subscriber may be connected. A plurality of mobile switching centers serve as the home exchange for a plurality of mobile subscribers. A plurality of mobile switching centers serve as the visited exchange for a plurality of mobile subscribers for which each is not the home exchange. A data network interconnects each of the mobile switching centers. A subscriber interrogation point is connected to the data network and is associated with either other such points or a group of mobile subscribers. The subscriber interrogation point has a memory containing information associated with each mobile subscriber identifying either its home exchange or other interrogation points able to identify such home exchange.