MPLS中一种具有二级缓存结构的VC合并方案

A VC merging scheme with two-hierarchical buffer in MPLS

指出了MPLS中简单VC合并方案的不足,据此提出了一种符合MPLS要求的具有二级缓存结构的VC合并方案,称其为HBVC。HBVC可应用任何服务调度策略在LSP内的不同合并流之间提供基于分组的交换,并可在不同的LSP之间进行信元级的交换,因此将有利于QoS的实现。与另一种可应用于MPLS中的VC合并方案CRAM作了比较。分析表明HBVC在可扩展性、网络时延、系统最大吞吐率、对流量工程的支持、兼容性、系统实现复杂性等方面均优于CRAM。

The weakness of simple VC merging scheme in MPLS is pointed out. Based on these, a VC merging scheme called HBVC is proposed, which has two-hierarchical buffer and can meet the requirement of MPLS. HBVC can use any scheduling policies to provide packet-based switching between different merging flow in LSPs and cell-based switching between LSPs. So it helps to support the implementation of quality of service. The comparison of HBVC and CRAM, another VC merging scheme that can be used in MPLS, is made. Analysis shows HBVC is superior to CRAM in many aspects, such as expandability, network delay, maximum system throughput, support to traffic engineering, compatibility and implementation complexity.