Research On Differential Service Model Based On MPLS Traffic Engineering

With the diversification of Internet services and the diversification of business traffic demand,the current IPv4 network shows that the traffic is too concentrated and the quality of service is not guaranteed.This paper analyzes the cause of these two bottlenecks-SPF Routing algorithm.In order to solve these transmission problems,this paper first discusses the IP QoS technology based on metric value and the ATM QoS technology with additional deployment hardware.By comparing and analyzing the advantages and disadvantages of the both,MPLS TE technology is introduced.On the current IP bearer network,the MPLS TE technology constructs a virtual channel between two communication nodes through the link information in the TEDB,and effectively optimizes and manages the traffic without increasing the hardware deployment cost.This paper selects the differential service model by analyzing the implementation,application scenarios and service effects of the three QoS service models.In the differential service model,by analyzing and comparing the processing mode of the IP packet TOS field with the processing mode of the MPLS on the EXP field in the Label,this paper proposes a differential service model based on MPLS TE.MPLS technology uses the CSPF algorithm to plan the path.This algorithm is easy to cause route preemption and cascading preemption in the path re-planning process.In this paper,the association between links and the available bandwidth of the link are considered.The BCPPF algorithm is proposed.By dividing the link between communication nodes into two sets of preemptible link and non-preemptable link,the link load increase and the link efficiency decrease caused by route preemption are reduced.In the network simulation tool OPNET,the paper simulates the performance of MPLS TE technology in both traffic management and service quality by simulatingthe IPv4 bearer network.The experimental results show that the combination of MPLS traffic engineering and differential services can effectively optimize traffic,improve link utilization,and protect traffic for key services.