System and method for performing routing of calls in a cellular subsystems

摘要

A communication system, comprising a network switching system (MSC) and in addition to a conventional subsystem (BSS) comprises a second subsystem (WIO, BTS) accessible by a first group of mobile subscribers of the communication system. Said second subsystem comprises means (ILR, GK) for mapping a number identifying a mobile subscriber in the communication system to a network address of the second subsystem (WIO, BTS) when the mobile terminal of the mobile subscriber is able to communicate with a base station (BTS) of the second subsystem (WIO, BTS).