The Survivability Technology Of Multi-Domain Optical Network

The next generation optical network will be divided into multiple routing domains to improve the performance of routing and signaling, network reliability, scalability and security. It will be essential to define the border of network management and to adopt the technology of distributed management and hierarchical routing. To ensure the network scalability, the detailed information of the connection and bandwidth allocation in one domain will be limited to itself, and only aggregated information will be exposed to the external domains. As a result, no node in the multi-domains has the global information about the whole multi-domain network. In such circumstance, how to provide reliable connections to the traffic and improve the reliability are crucial to the operation of multi-domain network.This work focused on the survivability technology, especially the protection technology of multi-domain optical networks. In the first two chapters, we present an overview on some excellent solutions that have been proposed by others, and emphasis the importance of multi-domain network protection technology. In the Chapter three, we report our test method and results on the GMPLS Test and Emulation Platform. It shows that it is necessary to divide a large scale network into multiple domains. In the chapter 4, we propose a shared sub-path protection mechanism for multi-domain optical networks, whose motivation is to protect node failure, hide intra-domain failure and decrease switching time. They are the crucial factors to the network performance and not considered in many existing solutions. We give some detailed mathematical description and theoretical analysis of the proposed algorithm. In the chapter 5, we simulate the proposed algorithm, analyzed the experimental results and draw a conclusion.