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| Author(s): |
Daniela Vieira Cunha
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Escola Politécnica (EP/BC) |
| Defense date: | 2006-04-04 |
| Examining board members: |
Graca Bressan;
Tereza Cristina Melo de Brito Carvalho;
Mauricio Ferreira Magalhaes;
Wilson Vicente Ruggiero;
Michael Anthony Stanton
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| Advisor: | Graca Bressan |
| Abstract | |
To satisfy the explosive increasing demands of voice and data traffic, optical networks based on WDM and GMPLS are being developed. The GMPLS´ suite of protocols is currently being considered as the control plane for optical networks and it is compounded of signaling and routing protocols, and also the link management protocol (LMP). The LMP is an important protocol that interferes with label (wavelength) assignment and it is necessary to logically analyse this protocol in order to verify if it is free from progress errors. For this purpose, the method called fair reachability has been used. Verified the LMP is correctable, the study focuses on the RWA wavelength assignment problem in GMPLS-WDM networks because it is one of the main problems which causes the low performance of these networks. The studied scene is GMPLS-WDM networks operating under a dynamic RWA environment with wavelength continuity constraint. The RWA problem is examined and also the various wavelength-assignment heuristics proposed in the literature. With the goal to improve the performance of the GMPLS-WDM networks with wavelength continuity constraint, it is proposed a label assignment algorithm, which uses the concepts of label set and SRLG, already implemented by GMPLS. The proposed algorithm provides an improvement in efficiency of resource use. The performance is verified by using the blocking probability metric, and it is very close to the optimum and demonstrated through simulations. (AU) | |