OBS 网络中边缘电缓存冲突规避机制研究.pdf

第 39 卷第 1 期电子科技大学学报
2010年1月 Journal of University of Electronic Science and Technology of China Jan. 2010
OBS网络中边缘电缓存冲突规避机制研究
徐世中1,杨德明1,周开宇2,王晟1 
(1. 电子科技大学光纤传感与通信教育部重点实验室成都 610054; 2. 中国电信北京研究院北京西城区 100035)

【摘要】分析了光突发交换网络中传统的冲突规避技术的优缺点,提出了一种基于边缘节点的电缓存冲突规避机制(EBR)。
该机制通过将冲突的突发包偏折到与核心节点直接相连的边缘节点的调度模块的电缓存,来解决核心节点处的交换冲突。该
机制在自相似业务源下进行了仿真,仿真结果显示可以较好地降低丢包率,并且代价较小;同时该机制的简单性使其可以很
容易地与其他冲突规避机制共存,更好地提高了网络性能。
关键词冲突规避; 边缘电缓存; 光突发包; 光突发交换
中图分类号 文献标识码 A doi:.1001-

Edge Buffer Based Contention Resolution Scheme
in Optical Burst works

XU Shi-zhong1, YANG De-ming1, ZHOU Kai-yu2, and WANG Sheng1
(1. Key Laboratory of Optical Fiber Sensing munications of Ministry of Education,
University of Electronic Science and Technology of China Chengdu 610054;
2. Academy of Beijing, China Xicheng Beijing 100035)

Abstract Optical burst switching (OBS) is one of the promising switching technologies of the all optical
networks. When burst contention occurs at an intermediate switch due to limited resources, the bursts that are in
contention will be dropped. In this paper, we propose an edge buffer based contention resolution (EBR) scheme,
which could mitigate and resolve contention by deflecting the contending bursts to the electronic buffer of the
schedule module in the edge nodes which are directl