MPLS网络中基于约束路由机制实现流量工程的研究

传统内部网关协议(IGP)容易造成网络资源使用的不均衡,引起网络拥塞,导致网络性能下降,服务质量无法保证。流量工程是解决这一问题的有力工具,它可以为网络用户提供各种QoS保证,同时提高网络性能、优化网络资源的使用。多协议标签交换(MPLS)为流量工程的实施提供了便利,其核心技术就是基于约束的路由机制。论文对基于约束的路由机制进行了重点论述,为其建立了数学规划模型,并给出了常用的优化算法。

Study on Traffic Engineering Based on Constraint-based Routing in MPLS Networks

Traditional IGP is prone to make unbalanced use of network resource,which results in the congestion in net-works,leading to the degradation of network performance and non-guarantees of QoS.Traffic engineering is a powerful tool for this problem.It can guarantee diversified QoS requirements for network users,simultaneously,promote the network performance and optimize the utilization of network resources.MPLS facilitates the implementation of the traffic engineer-ing,whose core technology is constraint-based routing mechanism.This paper puts emphasis on the discussion of con-straint-based routing,its mathematical programming model is given and several common optimization algorithms are illus-trated.