Systems engineering for portability of services

Portability of services will be one of the key elements of personal communications since it will enable us to communicate with everyone, anytime and anywhere. Mobile communications are reviewed in conjunction with radio and network technologies. The most important and often overlooked condition: customer requirements will be discussed by comparing the cordless phone and cellular phone approaches toward personal communications systems (PCS). A perspective view of PCS through PHS field tests in Japan will be given with survey data on acceptable tariff and what customers really want. An example of portable terminal development will be described to meet these customers requirements: high quality voice transmission, longer talk time, small and light weight through 1-chip LSIC implementation