CAJ | 학술논문

在多协议标签交换(MPLS)网络中，ATM-LSR的VC合并机制能把多个IP流映射到同一个VC标签上进行转发，增强了网络的可扩展性．对已提出的一些ATM网络VC合并机制进行了研究，分析了这些技术存在的主要问题，如需要额外的缓存、协议开销及时延，导致不能保证业务的QoS需求等．最后对ATM信元头负载类型域的两位进行重编码，提出了一种新的支持MPLS VC合并的调度方法，使得信元既可以交错，又能唯一区分．其主要特点为：实现简单；不需要额外的缓存和协议开销；能保证基于流的QoS．但是，它使用了近似GPS的循环调度机制，在负载较低时带宽利用率略有下降．
재다협의표첨교환(MPLS)망락중，ATM-LSR적VC합병궤제능파다개IP류영사도동일개VC표첨상진행전발，증강료망락적가확전성．대이제출적일사ATM망락VC합병궤제진행료연구，분석료저사기술존재적주요문제，여수요액외적완존、협의개소급시연，도치불능보증업무적QoS수구등．최후대ATM신원두부재류형역적량위진행중편마，제출료일충신적지지MPLS VC합병적조도방법，사득신원기가이교착，우능유일구분．기주요특점위：실현간단；불수요액외적완존화협의개소；능보증기우류적QoS．단시，타사용료근사GPS적순배조도궤제，재부재교저시대관이용솔략유하강．
In Muhiprotocol Label Switching (MPLS), VC-merging enables multi IP flows to be mapped onto the same VC label if they have the same destination. It provides a scalable solution for the network growth. This paper studied several approaches having been proposed to this day and analyzed their main problems, such as the additional buffering, protocol overhead, delay etc. , which make the provision of QoS difficult to achieve. With the help of reoding two bits inside the head of ATM cell, this paper put forward a new MPLS VC-merge capable scheduler. It allows cells to be interleaved with one another and be uniquely identified. The new scheduler has several properties: ① simple to implement, ② requiring no extra buffer and protocol overhead, ③ maintaining perflow QoS. However, it may introduce a minimal waste of link bandwith when utilization is low due to the approximately GPS round robin scheduler it uses.