The Research Of MPLS Network Traffic Equalization Based On Flexible Control

Traditional IP network routing system can only provide the accessibility of data transmission Service.Some links are excessive use of network resources,but some links are free.It congested the network and the Quality of Service can't be guaranteed.At the same time,the traffic is now required by QoS.These businesses also have different requirements for services such as end-to-end transmission delay and transmission bandwidth.If the type of traffic flow is not distinguished,it is difficult to assign the most appropriate transport links for different traffic flows.For the above problems,domestic and foreign researchers have proposed a large number of network routing strategies,among which the most basic used is MPLS traffic engineering.However,the traditional distributed mechanism of MPLS network makes the collection and distribution of information very complicated,and traffic control complex.The business type is not subdivided so that QoS is not good.Based on the analysis of existing MPLS network routing strategies,this paper studies the existing problems of MPLS network and carries out corresponding research work.There are two main tasks:(1)Based on the centralized control of SDN controller,a MPLS network traffic equilibrium routing strategy based on flexible control is proposed.In this routing strategy,a virtual node is setted up,and it collects each transport nodes' updated information,and calculates the node path.After that,complete routing information is stored in the routing table of the virtual node.According to the parameters such as bandwidth and time delay,the quality path will be assessed.Then,it will set up the LSP with the weight,and link traffic will be properly scheduled according to the reasonable weights.The simulation results show that the method has better performance and the average packet loss rate of the whole MPLS network decreases and the throughput is increased.(2)For the different QoS requirements of the business,according to the time delay,the remaining bandwidth and reliability of the link analysis,we can define different weight coefficient calculation and establish the multiple objective optimization model to determine the constraints and objective function.By solving the closest link which is closest to ideal link to get the optimal path.The simulation results show that the multi-type business classification method can improve the demand performance of each business.