摘要： 提出了一种MPLS 网络并行路径间合理分配流量实现流量均衡的分布式流量工程算法DITB。该算法利用LER 与LSR 各自在统计网络状态信息方面的优势，通过引入3 种消息实现彼此间网络状态信息的传送，由LER 将整条路径的拥塞状况与单个链路的拥塞状况相结合，直接给出合理的流量均衡方案，达到流量工程的目的。通过仿真分析验证，该算法网络开销少、运算速度快、优化效果较为明显。

关键词: 流量工程；并行路径；分布式；MPLS

Abstract: A distributed traffic engineering algorithm DITB applied into the MPLS network is presented, which implements the traffic balance through distributing traffic load into parallel paths. DITB algorithm realizes the state information interactive through three messages based on the advantages of LER and LSR in the network state information statistics. With the collection of information, LER considers both the whole LSP congestion and the single link congestion to offer a reasonable solution of the traffic distributions. The simulation analysis shows that the proposed algorithm can be implemented in less network cost, higher computation speed, and more obvious optimization performance.

Key words: Traffic engineering; Parallel paths; Distributed; MPLS