基于分层虚拓扑的跨粒度层增强生存性的方法  

Layered virtual topology-based trans-granularity layer survivability enhancing method

作　　者：曲桦[1,2] 焦磊[1] 赵季红[1] 王力[2] 

机构地区：[1]西安邮电学院通信工程系,陕西西安710061 [2]西安交通大学电信学院,陕西西安710049

出　　处：《光通信研究》2011年第2期4-7,共4页Study on Optical Communications

基　　金：国家自然科学基金资助项目(61071126;60872058);新一代无线重大专项基金资助项目(2010ZX03004);国家"八六三"计划资助项目(2009AA01Z213)

摘　　要：在多粒度光网络中,为了满足可变的业务带宽请求,降低高带宽请求业务的阻塞率,减少低带宽请求业务接入时造成的网络资源浪费,提出了一种基于分层虚拓扑的跨粒度层增强生存性的方法。该方法首先根据波长粒度和波带粒度设计了一种分层虚拓扑,然后根据业务请求带宽在各粒度层上或跨粒度层计算工作路径和保护路径。分析结果表明,该方法可有效提高资源利用率,降低阻塞率。In multi-granular optical networks,in order to meet the requests for variable service bandwidths,lower the blocking rate for high-bandwidth service requests and reduce network resource waste in low-bandwidth service request access,we propose a layered virtual topology-based trans-granularity layer survivability enhancing method.With this method,we first design a layered virtual topology according to wavelength and waveband granularities and then calculate the working and protection paths on each granular or trans-granular layer according to service request bandwidths.Analytical results show that this method can effectively improve network resource utilization ratio and reduce blocking probability.

关 键 词：分层虚拓扑 跨粒度层 多粒度光网络 生存性 

分 类 号：TN915[电子电信—通信与信息系统]