作　　者： ; ; ; ;

机构地区： 华南理工大学电子与信息学院

出　　处： 《电路与系统学报》 2010年第3期81-85,104,共6页

摘　　要： 本文提出了一种在MPLS网络中进行自适应接入控制的抢占策略。该策略通过对已接入的低优先级LSP的QoS的降级来保证新接入的高优先级的LSP的接入请求。在进行降级时考虑了被降级的LSP的优先级、释放的带宽资源和LSP的降级比例。仿真结果表明,该抢占策略能提高网络的带宽利用率,减少LSP被重路由的代价。 In this paper, a new adaptive preemption policy of access control is proposed in MPLS networks. It is complemented by an adaptive scheme which adjusts the rate of selected low-priority LSPs that can afford to have their rate reduced in order to accommodate a higher priority request. When the LSP is degraded, three main criteria--the priority of degraded LSP, the bandwidth released and the degrade ratio--is considered at the same time. Simulation results indicate that our policy can improve the network resource utilization while minimizing LSPs＇ rerouting. Moreover, the computational complexity of our algorithm is acceptable for router＇s online computing in large scale networks.

关 键 词： 流量工程 多协议标签交换 自适应接入控制 抢占代价

领　　域： [电子电信] [电子电信]