Research On Traffic Grooming Algorithm In Power Communication Optical Network

With the development of smart grid, data services with the type of IP and large bandwidth requirement continue to increase in the power communication optical network. The transport network using technologies of MSTP and WDM faces great challenges in this situation. As a typical representative of next generation optical network technology, OTN is the key technology to build power communication optical network with large capacity. By adopting the advanced optical network technology to transport the service, there is a great gap between the single fiber capacity and the optical service bandwidth requirement. As an important way to eliminate the gap, to improve the and optimize the performance of network load and utilization of network resources, traffic grooming becomes one of the most important focuses in optical network research. The traffic grooming algorithm in power communication optical network must be fully studied.Firstly, based on the analysis of China power communication optical network and optical network architecture, the integration network model for power communication optical network is proposed in this paper to adapt the requirement of new data services with the type of IP and large bandwidth requirement.Secondly, a Layered Interconnected Graph Model (LIGM) based traffic grooming algorithm for power communication optical network is proposed in this paper. The LIGM is based on the optical network physical topology, and the costs of every link represent the optical network resources. The initial solution set is calculated by the grooming path optimization selection strategy and the optimal grooming route is chosen from the set with the O/E/O number of each path. By adopting the load balancing mechanism, the algorithm can perfectly solve the problem of traffic grooming in optical networks. Compared with other traffic grooming algorithms, the LIGA effectively reduces the blocking probability and makes full use of the optical network resource.Finally, to satisfy the differentiation requirements of different services in the power communication optical network, a differentiated service based traffic grooming algorithm is proposed in this paper. The costs of every link in LIGM will be updated according to the optical network resources. The alternate path set is calculated by adopting the K shortest path algorithm with the limit of O/E/O conversion number which is confirmed by the service level. By using the traffic grooming path selection optimization factor, the service could be groomed tc the path in the alternate path set in with the least O/E/O conversion number. The network resources could be allocated to different levels of service by adopting this algorithm.