流量工程中一种权重配置动态路由选择算法

A Kind of Dynamic Routing Algorithm of Weight Allocation for Traffic Engineering

提出了一种MPLS(Multiprotocol Label Switching)网络中新的权重配置动态路由选择算法,该算法以跳数、带宽碎片要求及空闲带宽比率为权重,给到达流量合理分配带宽资源.在MPLS网络边缘实现路径选择后,使用MPLS显示路由技术即可摆脱中间结点路由算法的影响, 建立起满足各种业务QoS(Quality of Service)需求的LSP(Label Switched Path).仿真实验表明,该算法能够更好地进行流量均衡,减小网络拥塞;通过减小带宽碎片和提高带宽利用率更好地利用网络资源;同时通过改善丢包率等参数来实现一定的QoS保证.

Proposes a new dynamic routing algorithm of weight allocation for MPLS networks, taking mainly the hops,demands for bandwidth fragment and idle bandwidth rate into account to allocate rationally the bandwidth resource for incoming traffic. After implementing the routing selection at the border of MPLS networks, the explicit routing technique in MPLS is used to get rid of the effect of routing algorithms at middle nodes so as to give an LSP that will meet QoS requirements of all kinds of services. The simulation results indicated that the new algorithm can balance the traffic better, decrease the congestion in networks, utilize sufficiently the network resources by decreasing bandwidth fragment and enhancing the utilization of bandwidth and guarantee QoS to a certain extent by improving some parameters such as the losing rate.