PNNI-based Routing Algorithm in ATM Network

In this paper, we propose an implementation scheme of source routing function, one of the characteristics, in applying PNNI protocol to ATM switching system. The proposed substance is a PNNI routing software structure design and source routing algorithm. The software structure guarantee maximal independence among blocks by keeping a function manager, composing a handling block separately, working together between those. As the path selection scheme has characteristics to choose real-time path and establish a path satisfying QoS, the source routing algorithm is desirable that pre-calculated scheme together with ondemand scheme is used. Key-Words : ATM, PNNI, Source Routing, Path Selection