Title :
An efficient dynamic protection scheme in integrated IP/WDM networks
Author :
Zheng, Q. ; Mohan, G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
This paper presents an efficient protection scheme to dynamically allocate restorable bandwidth-guaranteed paths in integrated IP-over-WDM networks. A restorable bandwidth-guaranteed path implies an active path and another link-disjoint backup path both with the required bandwidth. Dynamic traffic where connection requests arrive one by one with no knowledge about future requests is assumed. We consider integrated IP/WDM networks with generalized multi-protocol label switching (GMPLS) capabilities. To optimize the network resources, we provide the protection at the multi-protocol label switching (MPLS) layer and backup resources are judiciously shared among different requests at the label switched path (LSP) level. To allocate the restorable bandwidth-guaranteed paths, we propose two integrated routing algorithms: hop-based integrated routing algorithm (HIRA) and bandwidth-based integrated routing algorithm (BIRA). We use connection blocking probability and number of optical-electrical-optical (o-e-o) conversions as performance metrics to evaluate these two algorithms. Through extensive simulation experiments, we demonstrate that our algorithms perform better in terms of the above two metrics than other existing approaches.
Keywords :
IP networks; multiprotocol label switching; probability; telecommunication network routing; telecommunication security; telecommunication traffic; wavelength division multiplexing; WDM networks; bandwidth-based integrated routing algorithm; blocking probability; dynamic protection scheme; dynamic traffic; hop-based integrated routing algorithm; integrated IP-over-WDM networks; label switched path; link-disjoint backup path; multiprotocol label switching; network resources; optical-electrical-optical conversions; restorable bandwidth-guaranteed paths; Bandwidth; Intelligent networks; Network topology; Optical fiber networks; Optical receivers; Optical transmitters; Protection; Routing; WDM networks; Wavelength division multiplexing;
Conference_Titel :
Communications, 2003. ICC '03. IEEE International Conference on
Print_ISBN :
0-7803-7802-4
DOI :
10.1109/ICC.2003.1204640