Subcarrier multiplexed broad-band service network: a flexible platform for broad-band subscriber services

The concept of the subcarrier multiplexed broadband service network (SCM-BSN) has been developed in response to the need to provide low-cost integrated broad-band services in the local loop. The SCM-BSN architecture incorporates three elements which have been identified over the past few years as key cost-saving features: passive optical splitting, fiber-to-the-curb, and subcarrier multiplexing of video signals. This paper introduces the SCM-BSN concept, describes a prototype system that has been built at GTE Laboratories, and describes some possible evolutionary scenarios to integrated digital services. While the SCM-BSN prototype system has been designed to provide voice, data, and switched video services using FM-video modulation, the BSN design has been structured to provide for a graceful evolution to other broad-band services including HDTV, digital video, and integrated broad-band services based on ATM transmission. Because of its potentially low-cost and flexibility, SCM-BSN is attractive for local loop services.