Title :
Resource Aware Routing and Intelligent Wavelength Assignment for Cooperative Clustered OBS networks
Author :
Ul Haq, Ikram ; Salgado, Henrique M. ; Castro, Jorge C. S.
Author_Institution :
INESC TEC, Porto, Portugal
Abstract :
Burst loss is a critical issue in Optical Burst Switching (OBS) networks which restrains its deployment. This article presents a novel routing and wavelength assignment strategy for the Cooperative Clustered OBS (C20BS) network architecture, to proactively avoid contention. In C20BS, the network topology is divided into several manageable overlapping zones/clusters, with a Zone Head (ZH) node keeping an information base of zone resources. The ZH pre-computes a list of alternate k-shortest disjoint paths for every ingress-egress node pair within the zone. The ZH utilizes both the inferred knowledge about wavelength usage at the zone intermediate nodes and a novel poles apart heuristic for assigning wavelengths to incoming bursts. A route is selected among the pre-computed paths where the selected wavelength is available. As a result, traffic is balanced among the set of pre-computed routes, thus proactively reducing probability of contention. This strategy is called Resource Aware Routing (RAR) and Intelligent Wavelength Assignment (IWA).
Keywords :
optical burst switching; telecommunication network routing; telecommunication network topology; C20BS network architecture; ZH node; ZH pre-computes; alternate k-shortest disjoint paths; assigning wavelengths; burst loss; contention probability; cooperative clustered OBS network architecture; cooperative clustered OBS networks; heuristic wavelengths; inferred knowledge; information base; ingress-egress node pair; intelligent wavelength assignment; manageable overlapping clusters; manageable overlapping zones; network topology; novel poles; optical burst switching networks; pre-computed paths; pre-computed routes; resource aware routing; traffic balancing; wavelength assignment strategy; wavelength usage; zone head; zone intermediate nodes; zone resources; Barium; Europe; Optical switches; Routing; Contention Avoidance; Optical Burst Switching; Routing and Wavelength Assignment;
Conference_Titel :
High Capacity Optical Networks and Enabling Technologies (HONET), 2012 9th International Conference on
Conference_Location :
Istanbul
Print_ISBN :
978-1-4673-2891-3
DOI :
10.1109/HONET.2012.6421465