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survivable networks using (virtual) paths (ng)SDH/SONET, ATM, MPLS, WR-DWDM

BUTE (BME). Shared Protection Rearrangement. Tibor Cinkler, Diána Meskó, Attila Mitcsenkov, {cinkler, mesko, mitcsenkov}@tmit.bme.hu. Motivation. Results for blocking robability. Blocking [%] vs. Network Capacity for the 30-node network – homogeneous traffic.

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survivable networks using (virtual) paths (ng)SDH/SONET, ATM, MPLS, WR-DWDM

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  1. BUTE (BME) Shared Protection Rearrangement Tibor Cinkler, Diána Meskó, Attila Mitcsenkov, {cinkler, mesko, mitcsenkov}@tmit.bme.hu Motivation Results for blocking robability Blocking [%] vs. Network Capacity for the 30-node network – homogeneous traffic • survivable networks using (virtual) paths • (ng)SDH/SONET, ATM, MPLS, WR-DWDM • restoration for any single failure • dynamic, adaptive route establishment Algorithms • Shared Path Protection (SBPP: Shared Backup Path Protection) • - End-to-End / Failure Independent Path Protection (FIPP) • - Segment-by-Segment / Domain-by-Domain • - Link-by-Link / Failure Dependent Path Protection (FDPP) • (True Mesh Path Restoration) • Rearrangement • - Simultaneously for all affected Protection Paths • - Decomposed • Working and Protection Path Calculation • - On-Line ( Dynamic (Adaptive) ) • - Joint • - Decomposed Blocking due to the protection blocking vs. Network Capacity for the 30-node network – homogeneous traffic Conclusion • Algorithms: • - SPP • - SPP-LD • - PDSP-LD • Method: • - Modelling Tricks: Link-Doubling • - MILP formulation solved by CPLEX • Three Networks: • - 16, 22, 30 nodes • Protection resources may be rearranged since they do not carry any traffic • Done adaptively • Improved performance • Assuming Link-by-Link Shared Path Protection • (Failure Dependent Shared Path Protection (FDPP)) • (True Mesh Shared Path Protection/Restoration) • instead of SPP - Further improvement Ethernet spanning tree optimization Joint project with: NoE e-Photon/ONe IP MuSE T. Cinkler, A. Kern, I. Moldován {cinkler, kern, moldovan}@tmit.bme.hu • 1GbE, 10GbE + low costs  candidate for metro network technology • Metro Ethernet (ME) should provide Carrier Grade services: ( Traffic and user separation, QoS, Protection, Traffic Engineering, etc.) • MEF and IEEE 802 provides technology for ME : but not optimization methods. We provide an OPTIMIZATION FRAMEWORK for MEs • Traffic engineered Logical Channels (LCs) • Provide QoS using absolute priority based scheduling • Dedicated, QoS and shared protection of LCs ! ILP and heuristic algorithms are proposed ! RemarkableOptimization Gain Protecion + Opt  gain remains Heuristic methods are near-optimal

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