SDN控制器方位自适应评估算法

SDN Controller Position Adaptive Evaluation Algorithm

多控制器的部署虽有效缓解了软件定义网络全网资源偏好的问题,却未能兼顾节点的通信时延和载荷度,导致全网服务质量欠佳。针对该服务质量问题,构思一种具有全局普适性的软件定义网络控制器方位自适应评估算法。该算法在充分发挥聚类优势的基础上建立服务质量级约束模型实施方位评估机制,并通过遍历游离节点进一步加强交换机和权属控制器的属性管理。为避免因资源偏好导致控制器响应迟滞,引入载荷度监测机制均衡全网控制器载荷的同时最小化子网域内节点对的通信时延代价。测试数据表明,所构思的算法在多个服务质量考查指标中均表现出了相对优势。

Although the deployment of multiple controllers effectively alleviates the problem of resource preference across the SDN network,it fails to balance the communication delay and payload of nodes,resulting in poor quality of service(QoS)across the entire network.To address the QoS issue,a globally applicable SDN controller position adaptive evaluation algorithm(CPAEA)is proposed.This algorithm establishes a QoS level constraint model to implement a directional evaluation mechanism based on fully leveraging the advantages of clustering,and further strengthens the attribute management of switches and ownership controllers by traversing free nodes.To avoid controller response delay caused by resource preference,a load degree monitoring mechanism is introduced to balance the load of the entire network controller while minimizing the communication delay cost of node pairs within the sub network domain.The test data shows that the CPAEA algorithm has demonstrated relative advantages in multiple QoS evaluation indicators.