STANDARDIZATION TRENDS FOR DIGITAL CELLULAR-SYSTEMS

In March 1993, NTT Mobile Communications Network Inc. (NTT DoCoMo) introduced in the Tokyo metropolitan area the first Personal Digital Cellular (PDC) telecommunication system based on the domestic unified standards, which were published by the Research & Development Center for Radio Systems (RCR) in April 1991. The digital cellular system is able to cope with the remarkable growth in the existing analog cellular telephone market, and to provide flexible, high-quality services. This article describes the basic policies, processes and scope for standardizing PDC systems.