| 一种光突发交换网络逻辑拓扑设计方法 |
| |
| 引用本文： | 张奭,秦浩,刘增基.一种光突发交换网络逻辑拓扑设计方法[J].西安电子科技大学学报,2005,32(5):691-696. |
| |
| 作者姓名： | 张奭 秦浩 刘增基 |
| |
| 作者单位： | (西安电子科技大学 综合业务网与关键技术国家重点实验室，陕西 西安 710071) |
| |
| 基金项目： | 国家自然科学基金重大研究资助项目（90104012）. |
| |
| 摘 要： | 为了减小光突发交换网络中单向预留协议的盲目性，引入光突发交换网络逻辑拓扑的概念，并基于逻辑拓扑提出了一种路由和波长分配算法．光突发交换网络逻辑拓扑设计问题用一个线性规划模型描述，优化的目标是给定物理拓扑和源宿结点对间的业务量强度，使逻辑拓扑能够承载的业务量最大．计算机仿真数据表明，该算法能够显著地削弱单向预留协议的盲目性，从而平衡链路负载，降低突发阻塞概率，当网络负载有限时，可以减少波长转换器的使用次数．
|
| 关 键 词： | 光突发交换 逻辑拓扑 波长和路由分配 |
| 文章编号： | 1001-2400（2005）05-0691-06 |
| 收稿时间： | 2004-10-15 |
| 修稿时间： | 2004-10-15 |
A logical topology design in the optical burst switching network |
| |
| Zhang Shi;Qin Hao;Liu ZengJi.A logical topology design in the optical burst switching network[J].Journal of Xidian University,2005,32(5):691-696. |
| |
| Authors: | Zhang Shi;Qin Hao;Liu ZengJi |
| |
| Affiliation: | (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi′an 710071， China) ; |
| |
| Abstract: | The one-way reservation protocol used in Optical Burst Switching(OBS) makes current routing and wavelength assignment(RWA) algorithms suffer from high burst blocking probability.In this paper,the logical topology of the OBS network is introduced to guide the lightpath establishment of the bursts,and an RWA algorithm based on virtual topology is given.The logical topology design problem is formulated as an integer linear programming(ILP),whose optimization objective is to maximize the carried load of the logical topology.Numerical results obtained for NSFNET show that our algorithm can not only balance the carried load on fiber links,but also reduce burst blocking probability.Moreover,it can reduce the number of used wavelength conversions greatly when the traffic load is not very high. |
| |
| Keywords: | optical burst switching logical topology routing and wavelength assignment |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《西安电子科技大学学报》浏览原始摘要信息 |
|
点击此处可从《西安电子科技大学学报》下载全文 |
