MPLS网络的综合接纳控制算法  

An Integrated Admission Control Algorithm for MPLS Network

作　　者：范淑艳[1,2] 韩卫占[2] 霍永华[2] 

机构地区：[1]西安电子科技大学通信工程学院,陕西西安710071 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《中山大学学报（自然科学版）》2011年第2期54-57,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家863计划资助项目(2007AA701210)

摘　　要：在多协议标记交换MPLS(MultiProtocol Label Switching)网络中,由于无法准确获取业务特征参数及汇聚后的业务流与单个业务流的业务特征不同,导致网络为业务分配的资源与其实际使用的资源不一致,因此仅依据控制面给出的理论可用带宽进行接纳控制决策将导致网络资源利用率降低。针对该问题提出一种新的接纳控制算法,该算法通过对带宽理论值与受控的端到端测量结果进行综合,获取网络的可用带宽,并作为接纳控制依据。通过构建实际试验环境进行了接纳控制试验。试验结果表明,采用推荐的接纳控制算法,可以提高低优先级业务的接纳成功率,并在一定程度上提供QoS保证,提高了网络资源利用率。In MPLS（MultiProtocol Label Switching） networks,the exact traffic characteristic parameters can not be obtained and the traffic characters of the single flow and aggregated flows are different.There may be variances between the allocated network resource and practically used network resource in MPLS network.That may result in lower network resource utilization if only the available bandwidth given by control plane are considered in network resource and admission control.Focusing on this problem,a new admission control algorithm is put forward in which the available bandwidths are obtained by theoretic parameters combined with controlled end to end measurement results.An experimental environment is constructed and some admission control experiments are performed.The experimental results show that with the proposed algorithm,the admission ratio of the traffic with lower priority can be improved,the QoS can be guaranteed to some extent,and the network resource can be utilized more efficiently at the same time.

关 键 词：MPLS网络 受控的端到端测量 接纳控制 接纳率 

分 类 号：TN915.85[电子电信—通信与信息系统]