The Extention And Realization Of Routing Protocols Of The Next Generation Optical Network

Next generation optical network is one of the hotspots of the communication research nowdays, and Automatically Switched Optical Networks (ASON) has been one of the most promising technology innovations with intelligent control. As the most important part of ASON, the control technologies have been the hotspots in optical network research since it was recommended by ITU-T. The framework of ASON is being repeatedly amended and extended to be standardized. But with regard to control technologies, which include signaling, routing, discovery and resource management, the mechanisms to realize them in current optical networks are not detailed officially, especially routing protocols. My researches in ASON focus on Routing and Signaling, and a lot of work has been done with the mechanism analysis, innovation and extension. In order to validate the achievements from my researches, an ASON simulation platform built in OPNET is used to demonstrate the routing performance. In this paper, the work in ASON routing protocols will be described in detail.ASON routing protocols need to provide automatically topology discovery and reliable link state information distribution, and calculate explicit route for optical network. Most of the present routing standards are based on traditional IP routing protocol to meet the requirement of ION routing. But the extension of the scale of the networks and the che changeability of the scale call for domain division, and the network also need survival strategies and face the requirement of the introduction of the packet transport network. So the routing protocol and strategies need to extand to meet the requirements. The researches in this graduate thesis are list listed as follow: 1) Based on OSPF, a novel ASON routing scheme is proposed and the frame and the realization of routing module are proposed too. The extension of the routing protocol is studied and based on the research the simulation platform was set up and routing schemes are simulated for performance analysis.2) The Routing Controller Module of ASON for P-Cycle realization was designed, and interface for the P-Cycle algorithm is provided for all kinds of algorithms. And the relationships among all the modules are studied and set up the ASON silumation platform for P-Cycle based on OPNET.3) Dynamic P-cycle is realized based on static P-cycle, and research was done for the dynamic P-cycle routing schemes. And dynamic P-Cycle is simulated for performance analysis and is compared with static P-Cycle and the differences are analysed.4) Packet transport network based on T-MPLS is studied and the node module is designed and several key points of routing stratedies are discussed.In the next generation optical network, especially in ASON the routing protocol need to work with other modules, Link Resource Management (LRM) and connection controller (CC) for example. LRM is used to find neighbour resources and to manage link resources, well CC is used to accomplish the conncetion, and management plane takes charge of the protocol donfigurations and the whole network management. In this graduate thesis other functions of the control plane are extended and realized based on the protocols. GMPLS-RSVP protocol is used in CC and LMP is used in LRMAll the performance statistics are derived from the simulation in OPNET. In the simulation platform, we have developed many modules for signaling, routing and link resource management in node model. And the graduate thesis the data based on the simulation is analysed and conclusions are given.