Download or read book Design and Analysis of Survivable Multipath Provisioning in Telecom Mesh Networks written by Sheng Huang and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With the maturity and deployment of next-generation SONET/SDH technologies, optical networks employing wavelength-division multiplexing (WDM) technology have emerged as the most viable infrastructure to meet the huge bandwidth demand for the future Internet. In such networks, survivability is a critical concern because the failure of a network element may cause tremendous data and revenue loss. This research investigates the issues of survivable multipath provisioning in next-generation telecom networks. Multipath provisioning, supported by virtual concatenation (VCAT), is a key feature of next-generation SONET/SDH networks. We first investigate the differential-delay constraint (DDC) problem in multipath routing. We present an effective approach for failure protection and backup sharing in multipath provisioning. We develop a novel algorithm to calculate differential-delay-constrained K link-disjoint paths and evaluate its performance with different DDC values. Next, we explore adaptive reliable multipath provisioning to meet the service-level agreement (SLA)between a network operator and its customer. We develop a model to calculate connection availability using multiple disjoint paths. Based on the model, we design an adaptive algorithm to increase provisioning efficiency. Two bandwidth-migration methods are proposed and studied for mission-critical requests. Then, we study the problem of survivable traffic grooming with inverse multiplexing. We compare the protection-at-connection and protection-at-lightpath level approaches with typical constraints including DDC, inverse multiplexing factor (IMF), and grooming ports. Finally, we propose and investigate the characteristics of a multistate multipath provisioning scheme for telecom mesh networks. We integrate the conventional primary-backup method with reprovisioning and degraded service into a state-transition model to handle different levels of failures, including disaster failure (DF). This work makes important contributions, including new models, algorithms, and architectures for survivable multipath provisioning in next-generation telecom networks.