Configuration of a DTM switch
Jian Liu · 2002
DTM, Dynamic synchronous Transfer Mode is a synchronous network protocol based on fast circuit switching. It provides a service supporting multicast, multirate channels with short setup delay. The time-division-multiplexing scheme implemented in DTM makes it possible to allocate bandwidth to a channel dynamically. DTM is designed for real-time applications but it supports bursty, asynchronous applications as well. Furthermore, non-blocking, time division switches with fully connected input ports and output ports exist today. This document presents a switch architecture designed for DTM networks. The switch is a time-space-time synchronous switch. Whole frames of data are mapped from input buffers to output buffers according to slot map tables. Thus, the slot map tables function as time slot interchangers in traditional time-space-time switches. The required length of the slot map tables for a frame with a given number of time slots is investigated. Some scheduling algorithms for the slot map tables are examined. Unicast and multicast connections are studied separately.