Design And Research Of Broadband Netword Management System For Sea Area

With the increasing tension in China's marine rights and interests,the construction of marine information network infrastructure has been upgraded to a national strategy.As an important part of ocean information network,network management system is responsible for monitoring and maintaining the efficiency and reliability of the network.Network management,located in the upper layer of the network system,is the core of network organization and management,reflecting the adaptability and intelligence of the network.The mainstream network management system is designed for equipment management,accompanying with many problems such as complicated cross-domain management process,inefficient manual operation,and difficult coordinated command and scheduling.The service management is mainly oriented to the service with stable statistical characteristics,meanwhile the management mode relies on the service scheduling and protection mode in the "pre-configuration" way.This management mode cannot meet the demands of the rapid development of network services,as well as the expectations of users for the diversity and high performance of network bearer services.The current network management platform also struggles to meet the network management demands of marine emergency relief,anti-terrorism security and many important application occasions.According to the demand of network management for mission-critical services,this paper proposes an intelligent integrated network management system supported by on-demand tasks.Based on the management of various heterogeneous devices and user terminals,the system coordinates the allocation of network resources and maintains the high reliability and high availability of the network in complex environments by protection,recovery and reconstruction mechanisms.Firstly,this paper studies the distributed network management oriented to service reconfiguration.In particular,the dynamically changing subnets and network elements are managed in a hierarchical and distributed way.The system layer plans the whole network resources for service scheduling in a unified way,the subsystem carries out real-time localization management on the network elements,supports gateway switching,collects network status to update network topology,link quality,service resources and alarm information in real time,continuously carries out service optimization calculation according to changes,and carries out service reconstruction in time.Secondly,the dynamic resource scheduling is studied.The network resources are processed as different branches of an algorithm when they are dynamically optimized and organized from the network level and the channel level.For backbone networks,the traffic is managed for the efficient utilization of network resources.A QoS routing strategy based on traffic prediction is used to generate QoS-satisfying paths for users,and multi-path routing algorithms and traffic allocation are implemented.This paper also studies the complex heterogeneous network management environment,analyzes the correlation between fault location and alarm,combines mobile agent technology with SNMP to collect the fault management data,and realizes fast route selection and recovery in the complex dynamic network environment.Finally,the design scheme of the marine network management system is given,which adopts a hierarchical and distributed organization form and improves the efficiency of fault management through parallel.A combination of polling and active reporting is used to improve the alarm response,meanwhile enhancing the reliability of fault detection.At the same time,the queue query mechanism is adopted to overcome the large transmission delay of wireless channels.Finally,the fault location is realized by intelligent rules and fuzzy matching.