A common air interface for a cellular auxiliary personal communications service

There are several standards for cellular systems that are in use around the world. In the United States, the most prolific is that described in EIA/TIA 553 or as it is more commonly known AMPS. In designing an in-building microcellular PCS, using an existing cellular system standard provides some advantages. Since the two kinds of systems have different requirements, it is not possible to use a cellular system standard for an in-building microcellular PCS design without some changes. In the United States, this has been done by taking the EIA/TIA-553 standard and adapting it for in-building microcellular PCS. The development and the main points of this new standard for a cellular auxiliary personal communications service (CAPCS) are described in this paper. Also, some preliminary results of a field trial of an in-building microcellular PCS based on the CAPCS standard are presented.