The Research And Implementation Of Distributed Routing Control System

With the emergence of e-commerce and video conferencing applications,people have increasingly focused on growing demand for network stability.Moreover,companies want a stable network services to bring more customers in and create more value.Above all,to improve the network Quality of Service,Internet service providers(ISPs)build and configure the network according to the best practice.But in networks OSPF routing protocol detected network failure in fixed speed and OSPF protocol did not dynamically adjust the convergence speed according to the network environment characteristics;there are obvious limitations for real-time applications.The network failure takes some seconds,this will seriously affect user's experience.In view of above problems,this paper proposed an autonomous routing control technology based on network compound damage degree method to accelerate the convergence of the network.Meanwhile the traditional fixed sampling technology can reduce system resources occupancy,but the sampling error is uncontrollable.Adaptive sampling techniques can dynamically adjust the sampling rate according to the network flow size,but it does not consider the use of system resources.All in all,this thesis studied sampling technologies and proposed an adaptive time-sharing packet sampling technology.This method took into account the system capacity and controllable error bound.The main contents of this thesis are as follows:(1)Current sampling technology is studied in depth.(2)Packet sampling techniques for time-sharing is proposed and tested in the laboratory network environment.(3)Proposed and analyzed compound damage degree of a network-aware routing strategy of self-control technology.