Banca de DEFESA: TATIANA DE OLIVEIRA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : TATIANA DE OLIVEIRA SILVA
DATE: 15/02/2022
TIME: 09:00
LOCAL: meet.google.com/pzp-uuki-rtw
TITLE:

Hybrid Strategy of dedicated protection and restoration driven by low-priority connections with differentiated degradation in EON networks

KEY WORDS:

Elastic Optical Networks, Survivability, Service Degradation

PAGES: 82
BIG AREA: Ciências Exatas e da Terra
AREA: Ciência da Computação
SUBÁREA: Sistemas de Computação
SPECIALTY: Teleinformática
SUMMARY:

The spectrum rigidity of wavelength-multiplexed networks (Wavelength Division Multiplexing - WDM) does not allow to accommodate requests proportionally to their bandwidth needs, causing waste in the spectrum. Therefore, Elastic Optical Networks (EON) have proved to be a solution for the future of optical transport networks, bringing flexibility and efficiency in the use of resources. The scalability provided by these networks proves to be an adequate paradigm for the bandwidth requirements for emerging applications on the Internet. Due to the volume of traffic supported by EONs, failure events can cause massive data loss. For this, protection and restoration schemes have been developed in order to minimize such damage. Service Level Agreement (SLA) specifications make it possible for applications to have their resources properly allocated and with their respective service degradation tolerance levels. Higher priority classes of service present greater restrictions to service degradation, while lower priority classes are more flexible to degradation. In this way, the classification of connections and their respective SLA specifications must be taken into account when defining disaster recovery strategies in order to identify the best opportunities that increase the network provisioning or re-provisioning capacity. This work proposes a hybrid survivability scheme (protection and restoration) with bandwidth degradation and restoration delay for low-priority connections transmitted in the backup path of high-priority connections. The proposed algorithm was compared with a path protection strategy with dedicated backup. The results obtained demonstrate that restoration based on service degradation and the use of backup resources reduces the overall network blocking probability and the blocking probability by classes. Furthermore, the proposed strategy increases the ability to restore low-priority connections interrupted by the disaster while maintaining the ability to restore high-priority connections.

BANKING MEMBERS:
Presidente - 1814505 - GUSTAVO BITTENCOURT FIGUEIREDO
Externo à Instituição - RODRIGO IZIDORO TININI
Externo à Instituição - PEDRO MESQUITA MOURA