MPLS应用于ATM环境中的两个关键技术

为克服MPLS与ATM技术融合时的困难,基于ATM特点分析了MPLS应用于ATM环境下很多技术受到限制或有所改变的原因·利用处理路由环的检测方法解决MPLS应用于ATM环境下的路由问题·针对MPLS中的标记对应于ATM信元中的VPI/VCI域,流合并意味着VPI/VCI合并的特点,应用流合并/流聚合技术减少标记的使用以改善网络的可扩展性,通过对VC合并中信元交织问题解决方案的剖析,指出虽然VC合并存在着合并点信元延迟增加以及需要更多缓存空间等缺点,但它以牺牲一级节点的转发效率为代价,而节省的是合并后的每一级节点的VC,因而延时也只是相当于增加了一跳

Two Key Technologies of Multiprotocol Label Switching Applying to the ATM Environment

Multiprotocol label switching(MPLS)is the more perfect technology for designing backbone network. In order to solve the problems existed when MPLS crasised with ATM,analyzed the reasons based on the traits of ATM why many technologies had to be restricted or be changed while MPLS crasising with the standard ATM technology. Solved the routing loop problem making use of the detection method in ATM environment. Aimed at the characteristic that the MPLS label corresponded to the VPI/VCI field in ATM cell and the merging means the VPI/VCI merging,applied for the stream merge and stream aggregated technologies to reduce the use of labels and improve the network scalability. Pointed out the advangtages are more than the disadvantages by taking apart the VC merging scheme that must solve the cell interleaving problem.