On achieveing bandwidth-aware LSP/lambda SP multiplexing/separation in multi-layer networks
2007 (English)In: IEEE Journal on Selected Areas in Communications, ISSN 0733-8716, E-ISSN 1558-0008, Vol. 25, no 5, 987-1000 p.Article in journal (Refereed) Published
We present a new Traffic engineering (TE) model which is based on QoS rerouting and uses hybrid resilience to improve the recovery performance of multi-layer networks where an MPLS network is layered above an MP lambda S network. We formulate the rerouting of the LSPs/lambda SPs as a multi-constrained problem and use its polynomial reduction to find a heuristic solution that can be implemented by standardized constraint-based routing algorithms. This heuristic solution uses a cost-based routing optimization to achieve different network configurations which multiplex/separate bandwidth-aware LSPs/lambda SPs on the network links. We formulate the resilience upon failure as a multi-objective problem consisting of finding a resilience strategy that minimizes recovery operation time and maximizes the LSP/lambda SP restorability. A solution to this problem is proposed where a hybrid resilience framework is used to achieve restoration in the MPLS layer to complement path switching in the MP lambda S layer. We evaluate the performance of the TE model when rerouting the tunnels carrying the traffic offered to a 23- and 31-node networks. Simulation reveals that the hybrid resilience model performs better than classical recovery mechanisms in terms of restorability, quality of rerouting paths and rerouting; stability.
Place, publisher, year, edition, pages
2007. Vol. 25, no 5, 987-1000 p.
multi-layer resilience, traffic engineering, generalized multi-protocol label switching, tunnel multiplexing/separation, multi-constraint routing, multi-objective routing
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-46402DOI: 10.1109/JSAC.2007.070611ISI: 000246670600011ScopusID: 2-s2.0-64549099716OAI: oai:DiVA.org:kth-46402DiVA: diva2:454397
QC 201111072011-11-072011-11-032011-11-07Bibliographically approved