A comprehensive analysis of QoS-based routing mechanisms over shared mesh protected optical infrastructures

Abstract

The paper describes a literature overview of the main building blocks of service level agreement based architectures over priority-aware shared mesh optical networks. The standardized protocols and existing algorithms for path attributes and service level agreement parameters negotiation are studied in this paper and shortcomings of each are identified. A thorough study of the priority-aware, service level agreement based, and risk-aware mechanisms including the existing mechanisms, the advantages and disadvantages, and the remedy for the shortcomings is provided. The mathematical models for availability analysis of different routing mechanisms, protection schemes, and network resources are discussed. Different routing strategies and wavelength assignment approaches are studied as well. The paper tries to show how the quality of service based routing mechanisms can provide service providers better network performance in addition to the higher revenue.