Fault tolerance of a large-scale multicast output buffered ATMswitch

摘要

In the paper, the fault detection, fault location, andreconfiguration schemes for a large-scale multicast output buffered ATMswitch (MOBAS) are proposed. The architecture of the MOBAS has a regularand uniform structure and, thus, has the advantages of: (1) easyexpansion due to the modular structure, (2) high integration density forVLSI implementation, (3) relaxed synchronization for data and clocksignals, and (4) building the center switch fabric with a single type ofchip. It is difficult to achieve fault tolerance in binary self-routingnetworks without adding additional switching planes, stages, orswitching elements in order to have multiple paths due to theircharacteristics of a unique routing path between any input and outputpair. However, since the MOBAS intrinsically has multiple paths betweenany input and output, it is inherently robust for faults without need toadd any additional switching elements. The fault-tolerance of the MOBASis shown through the performance analysis of the MOBAS under variousfault conditions