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A new lightpath establishing method for dynamic traffic grooming under the overlay model

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Abstract

This paper proposes the use of the saturated cut (SC) method to improve the network performance through efficient dynamic traffic grooming in IP/MPLS over WDM networks using an overlay model. With the SC information from the IP/MPLS layer, the optical layer can calculate a lightpath between two node sets rather than the earlier suggested approach of calculating such paths just between two nodes for better performance. We have used two criteria, bandwidth and path length, to find SCs and have proposed two algorithms which incorporate this in the path inflation control (PIC) policy proposed earlier. Two typical networks, NSF and COST239, were used for examining the network performance. The simulation results show that though both methods can significantly improve the overall network performance the SC method is more efficient for a sparse network like the NSF network rather than for a dense network like the COST239 network. Since calculating lightpaths for all node pairs for a SC is time consuming, we propose a considerably simpler heuristic approach that can provide almost the same level of performance improvement as the SC method but with much lower complexity.

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Authors and Affiliations

  1. Faculty of Information Engineering, Shenzhen University, Shenzhen, 518060, Guangdong, People’s Republic of China

    Bin Chen & Hui Wang

  2. School of Electrical and Electronic Engineering, Network Technology Research Centre, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore

    Sanjay Kumar Bose & Wen-De Zhong

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  1. Bin Chen
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  2. Sanjay Kumar Bose
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  3. Wen-De Zhong
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  4. Hui Wang
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Correspondence to Bin Chen.

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Chen, B., Bose, S.K., Zhong, WD. et al. A new lightpath establishing method for dynamic traffic grooming under the overlay model. Photon Netw Commun 17, 11–20 (2009). https://doi.org/10.1007/s11107-008-0139-9

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  • DOI: https://doi.org/10.1007/s11107-008-0139-9

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