Optical Transport Network Resource Planning Algorithm

With the rapid development of information technology, people's demands of multimedia information such as graphics, audio and video increase in a highly speed. How to satisfy the need for huge network bandwidth is an important problem. For this reason, OTN (Optical Transport Network) with huge bandwidth develops rapidly. How to plan OTN in an economic and effective way is a hot spot in research field. As a multi-layer network, OTN includes different technologies on different network layers, e.g., SDH (Synchronous Digital Hierarchy), MPLS (Multiple Protocol Label Switching), and WDM (Wavelength Division Multiplexing). In OTN network planning, the problem of capacity design for multi-layer networks needs to be carefully considered.In this dissertation, the author studies two cases in OTN network planning: SDH network capacity design under the constraint of multi-modular restriction and inter layer mixed sharing in MPLS over WDM networks.In chapter 2, the author studies SDH mesh network capacity design as following: post-modularization, progress-modularization and multi-modular optimized combination. The author proposes a fast heuristic algorithm named multi-modular optimal capacity (MMOC).In chapter 3, the author investigates backup resources mixed sharing between two different layers, present the rules of common wavelength resources sharing between backup LSP and working lightpath, and proposes a novel algorithm name BLSWL (Backup LSP Sharing Working Lightpath ).In chapter 4, the author proposes a new algorithm called WLSBL (Working LSP Shared Backup Lightpath), in which backup lightpath can share resource with working LSP. By design the link weight resonablely, WLSBL make backup lightpath share resource with working LSP as far as possible and finally achive the goal to save the backup resource.In this dissertation, simulation results indicate the proposed algorithms performance well.Chapter 5 describes the simulation platform software which is developed by the author. Model structure and some Pseudo codes are given too.