IP/WDM网络的跨层控制系统设计

Design of Cross-layer Control System for IP/WDM Network

针对现有IP/WDM网络中IP层与光层在网络恢复阶段的协同控制问题,设计一种基于认知的跨层控制系统。该系统采用叠加网络技术,引入跨层协同机制,完成业务恢复集中控制及故障条件下IP层与光层资源的统一调度。通过加强层间业务信息、带宽资源使用信息、网络故障信息的共享与交互,解决了现有网络控制方式存在的上下层资源抢占和恢复震荡等问题,从而实现基于状态感知的网络故障恢复。性能评估结果表明,该系统能有效降低控制信令代价,提高中断业务的恢复速度,并且具有良好的网络生存性能。

For the multi-layer control problem in IP/WDM network causing by the independent control of IP layer and optical layer,a cognitive-based cross-layer control system is proposed. The proposed system builds a new cross-layer controller on the original IP layer and optical layer control plane with overlay network design ideas. The controller performs traffic recovery and resource scheduling dynamically in case of network failure. By the enhancement of the information sharing,like traffic features,the usage of bandwidth,the state of network failures,the new system achieves a state-based recovery capability,and solves the problem of resource preemption and recovery concussion. Performance evaluation shows that this system accelerates recovery speed with limited signaling cost,and achieves better network survivability.