Name: UBIRATAN DE SOUZA PASSOS FILHO
Publication date: 20/12/2007
Advisor:
Name |
Role |
|---|---|
| MOISÉS RENATO NUNES RIBEIRO | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| MARCELO EDUARDO VIEIRA SEGATTO | Internal Examiner * |
| MOISÉS RENATO NUNES RIBEIRO | Advisor * |
Summary: The constraints of Optical Quality of Service (OQoS) in transparent optical networks
are herein addressed through empirical cost functions and from an analytical method based on
pump-probe model to calculate the impairments caused by Cross-Phase Modulation (XPM).
The joint effect of group velocity dispersion (GVD) and nonlinear effects, like Cross-Phase
Modulation (XPM) and Self-Phase Modulation (SPM), are considered through extensive
numerical simulation in single and multi-span systems. A representative cost function is then
found to encompass the physical impairments of a given link utilization (i.e., launched power,
wavelength grid, number of active channels, etc). Finally, this link-based approach is used to
demonstrate the simplification of the algorithms for Connection Admission Control (CAC)
integrated to the algorithm of Routing and Wavelength Assignment (RWA) in dynamic
lightpath provisioning with end-to-end optical QoS constraints at admission. The analytical
model is used both to assess the approximated solution and to propose a CAC-WA based on
on-line computation of XPM interference in networks built with dispersion compensated
links. Comparisons with classical physical layer unaware WA are provided in order to show
that the OQoS targets can be met with very limited increase in blocking probability.
