Eiichi Amada

High-speed multimedia backbone LAN architecture based on ATM technology

A new high-speed multimedia backbone LAN (MBLAN) architecture that efficiently accommodates existing terminals and offers connectivity with public networks in the introduction stage of broadband ISDN (B-ISDN) is presented. A logical 156-Mb/s ring with the standard synchronous optical network (SONET) format is a basic element to realize the proposed high-speed backbone LAN. Several rings are multiplexed into a 622-Mb/s or 2.4-Gb/s physical transmission line. The slotted ring access method is utilized for each logical ring in order to provide a multimedia communication facility. The slot size and format are based on the asynchronous transfer mode standard and offer easy connectivity with B-ISDN. Independent clocking using the SONET stuffing mechanism is also introduced to solve the jitter accumulation problem.<<ETX>>

An experimental photonic ATM switching system using an InP semiconductor optical switch

A prototype of a photonic ATM (asynchronous transfer mode) switching system is fabricated and evaluated. It uses a space-division-type optical switch array for switching optical signals. Each of its highways contains two 1.2-Gb/s signals (wavelength division multiplexed), and it has 4*4 optical switch ports. It can realize a total capacity of 9.6 Gb/s. An optical signal format and retiming architecture for bit and cell synchronization are proposed. Measurements of basic characteristics have been made.<<ETX>>

A photonic approach to ATM switching

An architecture utilizing a space-division optical switch is proposed for large-capacity ATM (asynchronous transfer mode) switching in each cell transfer period. Optical components are applied to the high-speed portion of the switching system, and their wide bandwidth and fast switching features are fully utilized. Basic and extended architectures for a large-capacity switching system, a method for improving system performance, data retiming, and results of a preliminary experiment are discussed.<<ETX>>

A consideration on ATM technology in private networks

A development scenario for ATM (asynchronous transfer mode) private networks and possible architectures for inter- and intra-premises private networks are discussed. It is pointed out that ATM is a promising technology for advanced private networks aiming at wideband and multimedia communication. It is suggested that ATM technology will be introduced first into private networks to support advanced and sophisticated applications in business communication environments. It is shown that MBLAN (multimedia backbone local area network) and SPN (super packet node) are possible architectures employing ATM technology.<<ETX>>

InP-based carrier-injection optical switch for photonic switching

An InP-based optical switch operating through carrier-induced refractive index change that is suitable for large-scale integration, polarization independence, and wavelength insensitivity is described. A compact optical switch module comprising a packaged version of the 4*4 optical switch array with novel fiber arrays (APT fiber arrays) is introduced. Preliminary experimental results of the optical switch unit obtained by integration with a traveling-wave amplifier are presented. An asynchronous transfer mode (ATM) switch architecture is also introduced as an example of applications of the optical switch module to switch systems in which the wide bandwidth of the optical switch module was successfully utilized.<<ETX>>