一种基于可分配流量的MPLS动态流量分配机制

A Distributable Traffic-Based MPLS Dynamic Traffic Distribution Scheme

在综合考虑标签交换路径(LSP)排队时延和丢包率的基础上,定义了一个能反映LSP负荷的指标:可分配流量(DT).并基于DT提出一种多协议标签交换(MPLS)动态流量分配机制(DT-MD),该机制只需要边缘路由器的参与,具有很好的可扩展性.仿真表明,DTMD具有较好的收敛性和稳定性,并能适应网络状态的动态变化;与单纯基于时延的流量分配机制相比,DTMD具有更好的公平性,能将流量更均衡地分配到各条并行LSP中.

A new parameter, which is based on label switching path (LSP) queuing delay and packet loss rates and refered to as distributable traffic(DT), is defined to reflect the load of LSP comprehensively. Then based on DT, an adaptive multiple protoced label switching (MPLS) traffic distribution scheme is proposed to perform traffic distribution in MPLS networks, which is refered to as DTMD. Only label edge routers (LERs) are required to perform special function in DTMD scheme, so the scalability is maintained. Simulation results indicate that the new proposed scheme can perform stable even in dynamic network environment, and it can distribute the traffic onto parallel LSPs more evenly and fairly when compared to delay-based schemes.