Protection and Spatial Reuse in Optical Burst Transport (OBT) Networks

Abstract

Optical Burst Transport network is a novel WDM ring architecture for Metropolitan Area Networks (MAN). It leverages the advantages of optical burst switching and WDM rings, while using a token-based medium access scheme. In this paper, we investigate protection together with spatial reuse property. Specifically we show how protection in OBT can be different from conventional protection and propose three algorithms for implementing a fast and low implementation cost, unidirectional 1:1 protection scheme. We analyzed the performance of these schemes via simulation and found an optimum algorithm for minimizing data loss and maximizing data delivery during the fault.Index Terms-MAN architecture, optical burst switching, optical burst transport, spatial reuse, WDM rings.

Experimental Demonstration of Protection Mechanism in OBT Ring Network

“…Therefore, to make the protocol complete, protection algorithm is required for the OBT protocol. In this paper, as an extension of the protocol improvement of the OBT, we experimentally demonstrate network protection on the OBT network, following the algorithm presented in previous literature [5]. The result shows that the OBT network can achieve link surveillance within 292 µsec plus round trip time of the ring network.…”

“…If the 'FaultOK' message traverses the ring and returns to the NOF, the latter assumes that the fiber cut has been successfully bypassed and it resumes operation as normal. For more detail of protection algorithm and further analysis, reader can refer to the previous paper [5]. We configure testbed as described in Figure 2.…”