In this paper, a novel method is proposed to address the problem of designing virtual topology over wavelength division multiplexing （WDM） networks under bandwidth demand uncertainties. And a bandwidth demand model ...In this paper, a novel method is proposed to address the problem of designing virtual topology over wavelength division multiplexing （WDM） networks under bandwidth demand uncertainties. And a bandwidth demand model under uncertainties is presented. The optimization goal of virtual topology design is defined as minimizing the maximum value amongp percentiles of the bandwidth demand distribution on all Hght-paths. Correspondingly, we propose a heuristic algorithm called an improved decreasing multi-hop logical topology design algorithm （ID-MLTDA） that involves with a degree of uncertainties to design virtual topology. The proposed algorithm yields better performance than previous algorithms. Additionally, the simplicity and efficiency of the proposed algorithm can be in favor of the feasibility for topology design of large networks.展开更多
通用成帧规程GFP、VC虚级联和链路容量调整机制LCAS是有效实现Data over SDH(DoS)的新型协议。基于此运营商可以实现网络带宽的动态分配响应。通过分析LCAS的特点、结构和功能实现方式,指出其作为一种源-宿之间无损伤的改变虚级联组容...通用成帧规程GFP、VC虚级联和链路容量调整机制LCAS是有效实现Data over SDH(DoS)的新型协议。基于此运营商可以实现网络带宽的动态分配响应。通过分析LCAS的特点、结构和功能实现方式,指出其作为一种源-宿之间无损伤的改变虚级联组容量大小的握手信令协议,其服务可以建立在集中或分布式控制基础上。特别分析了结合基于GMPLS/ASTN的智能化控制平面,LCAS将进一步拓展BoD应用。展开更多
基金Supported by the National Natural Science Foundation of China (No.90604002)Program for New Century Excellent Talents in University (No. 05-0807).
文摘In this paper, a novel method is proposed to address the problem of designing virtual topology over wavelength division multiplexing （WDM） networks under bandwidth demand uncertainties. And a bandwidth demand model under uncertainties is presented. The optimization goal of virtual topology design is defined as minimizing the maximum value amongp percentiles of the bandwidth demand distribution on all Hght-paths. Correspondingly, we propose a heuristic algorithm called an improved decreasing multi-hop logical topology design algorithm （ID-MLTDA） that involves with a degree of uncertainties to design virtual topology. The proposed algorithm yields better performance than previous algorithms. Additionally, the simplicity and efficiency of the proposed algorithm can be in favor of the feasibility for topology design of large networks.
文摘通用成帧规程GFP、VC虚级联和链路容量调整机制LCAS是有效实现Data over SDH(DoS)的新型协议。基于此运营商可以实现网络带宽的动态分配响应。通过分析LCAS的特点、结构和功能实现方式,指出其作为一种源-宿之间无损伤的改变虚级联组容量大小的握手信令协议,其服务可以建立在集中或分布式控制基础上。特别分析了结合基于GMPLS/ASTN的智能化控制平面,LCAS将进一步拓展BoD应用。
