VP protection switching on ATM ring network architecture

Abstract

AbstractWith an increase in demand for traffic and in modes of network services, it is required that the backbone network be able to cope flexibly with changes in demand for traffic with high speed and reliability. ATM ring networks can enhance the path capacity by unified processing of various service modes. In addition, due to the low transmission path cost attained by network topology, economical construction of a transport network is possible. In this paper, it is recognized that the path capacity becomes larger as the path length of the protection VP becomes longer. Then, a VP switching method for an ATM ring network, BPSR/PF (Bidirectional Path‐Switched Ring/Path‐Failure detection), is proposed in which the path length of the protection VP becomes the shortest. With regard to the items for evaluation, such as the maximum required link capacity, switching time, required number of link VPs, data sustaining number by VP pairs, and path survival rate, the proposed method is compared quantitatively with the conventional ATM ring network VP switching method. It is made clear that the proposed ATM ring network VP switching method BPSR/PF is superior. © 2002 Scripta Technica, Electron Comm Jpn Pt 1, 85(5): 57–70, 2002