A Novel Packet-Aware Transport Architecture
Bhawna Gupta, Swarup Acharya · 2005
o The rapid growth of data applications is forcing service providers to seek efcient means of carrying packet data over their legacy SONET/SDH networks, designed for circuit-switched voice trafc. This problem is exacerbated by the increased deployment of new Ethernet-based VPN services over their metro networks. To support Ethernet trafc, two packet- aware SONET/SDH transport architectures have been proposed n Ethernet-over-SONET/SDH (EoS) and Packet-Rings (PR). In this paper, we argue that both architectures make inherent tradeoffs that limit the volume of data trafc that may be supported. Instead, we propose a hybrid architecture called CyBorg that makes selective use of EoS pipes in conjunction with a PR capability. We formulate and propose a solution to the Setup Failure Re-arrangement problem that dynamically creates EoS pipes to supplement the existing PR if the system fails to satisfy incoming demands. We show through extensive simulations that by doing so, this novel architecture not only enables higher data trafc loads but achieves it with lower data switching capacity. We believe that this hybrid architecture and the efciency it provides, makes for a cost-effective solution for the dilemma facing service providers.