Sichuan Telecom Xx Local Transmission Bearer Network Optimization

After many years of construction, XX telecom local transmission bearing network has already formed three layers covering the city, county and township. Three layers are the core layer, the convergence layer and the access layer. Because the mainstream equipment suppliers, technical system or the construction ideas of operators are not all the same in different periods.Also under the influence of various factors of construction funds, construction period, market development, business development, etc. Current carrying network exists many flaws, such as topology is complex, the channel utilization is low, the channel cannot be controlled, management is weak, security is poor, etc.The optimization goal of local transmission bearing network is to fully analyze and utilize existing resources, excavate the potential of current network, analyze the problems in network operation and maintenance, research network fault reasons, and give corresponding solutions finally. The optimization can also conform to the technology development trend, and the introduction of new technologies can adapt to local conditions. The optimization process should not be done overnight. Under the premise of fully considering the cost, the smoothness of network development and other factors, it should be the phased construction and finally make transmission bearing network become the unified multi-service bearing platform which can provide end-to-end QoS guarantees as well as voice, data and video services.The thesis focuse on XX telecom to its own circumstances, a detailed study of the local transmission bearing network's optimization program will resolve the hidden danger of the core layer, the convergence layer and the part of the access layer. It will also adjust the overall network architecture after considering transmission capacity, safety, expansibility, flexibility, etc.The main contents are as follows:hidden danger of the core layer and the corresponding optimization program.hidden danger of the convergence layer and the corresponding optimization program. hidden danger of the access layer and the corresponding optimization program.In addition, the thesis tests some related functions of new ASON network in XX. After the optimization, hidden danger of the core layer and convergence layer will be resolved basically. And it also provides standardized recommendations for the transformation of the access layer in order to lay a solid foundation for later works.