標題: Design of Tunnel-based Protection Schemes in Multigranularity Optical Cross-connect Networks
作者: Lo, Tse Yu
Chen, Chien
Chen, Ying Yu
資訊工程學系
Department of Computer Science
關鍵字: Fault-recovery;protection;optical cross-connect (OXC);multigranularity optical cross-connect (MG-OXC);tunnel
公開日期: 2005
摘要: As the technology advances to increase the number of wavelengths in fiber links, multigranularity optical cross-connects (MG-OXCs) have emerged as a solution to reduce the manufacturing cost of the traditional optical cross-connects (OXCs). In this paper, we aim to provide an efficient fault-recovery protection scheme for the lightpaths in the MG-OXC networks. A segment-based protection scheme, called Tunnel Based Segment Protection (TSP) is proposed to recover the communications interrupted by a fiber cut. TSP first allocates all the tunnels off-line according to the historical traffic matrix and then starts to serve the incoming requests. When allocating a tunnel, a backup tunnel is always allocated as well. Consequently, a lightpath is naturally divided into segments according to the switching types along the path. Therefore, after a working path is found for a connection request, only a shared backup path for those segments in the corresponding wavelength-switching layers need to be found. In addition, TSP utilizes wavelength-switching ports efficiently since working and backup tunnels can share the same wavelength-switching ports at two ends of the tunnel. Simulation results show that the network performance is improved comparing to adapt a straightforward path protection scheme for MG-OXC networks.
URI: http://hdl.handle.net/11536/17839
ISBN: 978-0-7803-9276-2
期刊: 2ND INTERNATIONAL CONFERENCE ON BROADBAND NETWORKS (BROADNETS 2005)
起始頁: 336
結束頁: 338
Appears in Collections:Conferences Paper