Design And Implementation Of NGB Access Network Unified Management System Based On PON+EoC

NGB is the next generation of Chinese next generation broadcasting network.Because the network management system has higher performance requirements in transmission sub-network,so its access network management system has been a network management research hotspot and an industry design and implementation difficulties.With the large-scale construction and operation of the EPON + EoC access network,the unified management service of the access network has become an urgent need of the current NGB access network management.Based on the first 500,000-scale EPON network(OLT / ELT),EoC network(HS bridge switch,ONU and head-end system integration and EoC terminal)environment in Shanghai demonstration network,this thesis designed a novel unified management network management system.And the network management system has unified configuration management,performance management,fault management,security management,business system interface and other functions.The main contents of this thesis are as follows:1.Based on the NGB access network unified network management system researches,section.1 mainly studied the NGB system network management needs,network management technologies related to the previous research results and urgent problems;combined with the actual application of this research and desgin environment in-depth analysis with a literature review.And the main problems of network management and system design in EPON + EoC system were discussed as following,with the development technology frames of the unified network management system.2.In section.2,the system design(including working flow design)was implemented for the unified network management system based on NGB access network.Then,the functional requirement analysis,system structure diagram,system operation flow charts and related performance requirements of the whole system are presented.The function modules included as following: fault management module,performance management module,topology configuration module,business management module and system management module.3.Based on the system structure and working flow designs of the system,the detailed design of NGB access network unified network management system was carried out.The implementation keys include as following: network node and link modeling,network environment information generation,acquisition,network situation information Integration,and so on.Then the codes,the processing flow chart,and the key technologies were described in detail for the functional modules.4.In section.4,the key technologies of the unified network management in the system were studied,and the simulation performances are analyzed by the performance experiments.The key technologies included the gray situation evaluation algorithm and the network topology based on the SNMP protocol.In order to fully meet the needs of EPON + EoC system managers,the algorithms were compared with the old algorithms.The experiments were divided into two types: subjective experiments and objective experiments.The experiment results showed that the algorithms had better performance on the accuracy,the coverage,the client satisfaction,client response speed and other subjective/objective experiment results,than the old algorithms do so.