Abstract :
It is expected that the advent of digital radiotelephony with its attendant capability to provide multichannel per carrier service will significantly expand the capacity of the scarce spectrum. Two new concepts which are emerging in telecommunications, and the resultant synergy between those concepts are discussed. The first concept is the radio carrier serving area (RCSA), and the second is wireless digital access (WDA). The concept of the RCSA is evolving from the work of those telephone companies that have been pioneering in the development and implementation of basic exchange telecommunications radio service (BETRS). The RCSA, based on radio area coverage, is a logical extension of the CSA application for digital loop carriers which was introduced to the network in the early 1980s. WDA represents the future intersection of BETRS, digital cellular, and personal communications research. It is expected that digital radio loop and digital cellular will merge in the 1990s to provide WDA to the network. IMM´s Ultraphone system (RELP, DSPK, 4:1 CKTS/carrier) is discussed as a forerunner of these developments
Keywords :
carrier telephony; digital radio systems; mobile radio systems; radiotelephony; 4:1 CKTS/carrier; BETRS; DSPK; International Mobile Machines; RCSA; RELP; Ultraphone system; WDA; basic exchange telecommunications radio service; digital radiotelephony; multichannel per carrier service; radio area coverage; radio carrier serving area; wireless digital access; Cellular networks; Cities and towns; Costs; Differential quadrature phase shift keying; Digital communication; FCC; Integrated circuit interconnections; Telecommunications; Telephony; Urban areas;
