Distributed inter-domain lightpath provisioning in the presence of wavelength conversion

Authors:
Q. Liu;N. Ghani;N. S. V. Rao;A. Gumaste;M. L. Garcia
Affiliations:
Department of Electrical & Computer Engineering, University of New Mexico, Albuquerque, NM 87131-0001, USA;Department of Electrical & Computer Engineering, University of New Mexico, Albuquerque, NM 87131-0001, USA;Computer Science and Mathematics Division, Oak Ridge National Laboratory;School of Information Technology, IIT Bombay;ECE Department, Tennessee Tech University
Venue:
Computer Communications
Year:
2007

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Abstract

Dense wavelength division multiplexing (DWDM) has become the dominant transport layer technology for next-generation backbone networks due to its unprecedented capacity scalability. As a result, there is a pressing need to investigate lightpath provisioning in multi-domain DWDM networks. Although inter-domain provisioning has been well-studied for packet/cell-switching networks, the wavelength dimension (along with wavelength conversion) presents many added challenges. To address these concerns, a detailed GMPLS-based hierarchical routing framework for provisioning transparent/translucent/opaque multi-domain DWDM networks is presented. The scheme adapts topology abstraction to hide internal domain state so as to resolve routing scalability and security issues. Specifically a novel full-mesh topology abstraction scheme is developed for full wavelength conversion domains, i.e., to disseminate additional wavelength converter state. Related inter-domain lightpath RWA and signaling schemes are also tabled. Performance analysis results are then presented to demonstrate the effectiveness of the proposed mechanisms along with directions for future research work.