AN EXPANDABLE TIME-DIVISION CIRCUIT SWITCHING LSI AND NETWORK ARCHITECTURE FOR BROAD-BAND ISDN

A broadband network architecture is proposed that integrates multimedi a services, such as data, video, and telephony information, using 52-M b/s based STM-paths at the user network interface (UNI). The user can access any new service via the STM-based access network via either syn chronous transfer mode (STM) switching or asynchronous transfer mode ( ATM) switching, STM circuit switching supports long duration, constant bandwidth data transfer services such as video and high-definition te levision (HDTV) distribution and will also be used for the crossconnec t system, Circuit switching can provide transparent transmission durin g long connection periods. This paper also proposes an expandable time -division switch architecture, an expandable time-division switching L SI, and an expandable switching module for small to large size system applications, The proposed time-division switching LSI, module, and sy stem handle 52-Mb/s bearer signals and have throughputs of 2.4 Gb/s, 1 0 Gb/s, and 40 Gb/s, respectively, The time-division switch realizes v ideo distribution with 1:n connections, Finally, a local switching nod e that features an expandable 52-Mb/s time-division circuit switching network is shown for multimedia access networking.