一种光传送网动态联合选路与资源分配算法  

Algorithm for dynamic joint routing and resource allocation in optical transport networks

作　　者：苏扬[1,2] 徐展琦[2] 刘增基[2] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,西安710071 [2]西安科技大学通信与信息工程学院,西安710054

出　　处：《高技术通讯》2007年第9期881-885,共5页Chinese High Technology Letters

基　　金：国家自然科学基金（90104012）和西安电子科技大学研究生创新基金（05030）资助项目.

摘　　要：提出了一种融合IP/WDM、IP/SDH/WDM的光传送网分层网络模型,它将基于波分复用（WDM）的物理光网络划分为IP、SDH和WDM层,IP和SDH层分别产生基于IP的分组交换型业务和同步时分复用业务,WDM层以波长颗粒度为IP和SDH层提供信道.给出了这种分层网络模型中的动态联合选路与资源分配（DJRRA）算法,该算法能优化层间链路和层内逻辑链路的带宽使用.仿真结果表明,与传统的分离式逐层选路和资源分配算法相比,DJRRA能有效降低网络阻塞率,提高网络吞吐量.A layered network model involving IP/WDM and IP/SDH/WDM techniques was proposed for optical transport networks, in which a WDM-based physical optical network can be divided into IP, SDH and WDM layers. The IP and SDH layers produce the IP-based packet switching services and the time-division multiplexing services respectively, while the WDM layer offers the channels for these two layers with the wavelength granularity. The algorithm for dynamic joint routing and resource allocation （DJRRA） was presented for the proposed layered network model. It is observed the DJRRA algorithm can optimize the bandwidth usage of interface links between different layers and the logic links in all the layers. The simulation results also show that in contrast to the traditional separate sequential routing and resource allocation, DJRRA can reduce the blocking probability, hence increase network throughput effectively.

关 键 词：光传送网 分层网络模型 联合选路 资源分配 

分 类 号：TP338.8[自动化与计算机技术—计算机系统结构]