Support to heterogeneous traffic in optical networks: survivability

Author(s)

Darli Augusto de Arruda Mello

• Document type: Doctoral Thesis
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Elétrica e de Computação
• Defense date: 2006-06-20

Examining board members

Helio Waldman; Amilcar Careli Cesar; Miriam Regina Xavier de Barros; Otto Carlos Muniz Bandeira Duarte; Paulo Cardieri

• Advisor: Helio Waldman

Abstract

This thesis proposes concepts and mathematical formulations for the efficient allocation of connections with differentiated survivability. We use availability to found the choice of adequate protection or restoration mechanisms for survivability differentiation. Given a lack of accurate methods for availability estimation, we proposed approximations based on Markov models. We also derived bounds to the availability that allow to calculate estimation errors. We then developed an algorithm for allocating connections with guaranteed availability. It allowed us to verify the applicability of the shared backup path protection (SBPP) and dedicated path protection (DPP) schemes in networks of national (Italian network) and continental (American NSFNet) dimensions. In networks of national dimensions SBPP allows capacity gains. In networks of continental dimensions the use of both SBPP and DPP has shown to be impractical due to availability constraints. Finally, we suggested to employ the interval availability and outage duration distributions for the elaboration of service level agreements. We computed the distributions using existing numerical methods, and analytically, respectively (AU)

• FAPESP's process: 02/13269-3 - Support to heterogeneous traffic in optical networks
• Grantee: Darli Augusto de Arruda Mello
• Support Opportunities: Scholarships in Brazil - Doctorate