OBS网络中边缘电缓存冲突规避机制研究  

Edge Buffer Based Contention Resolution Scheme in Optical Burst Switching Networks

作　　者：徐世中[1] 杨德明[1] 周开宇[2] 王晟[1] 

机构地区：[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

出　　处：《电子科技大学学报》2010年第1期25-28,共4页Journal of University of Electronic Science and Technology of China

基　　金：国家973计划(2007CB307104);国家自然科学基金(60972030);国家863计划(2007AA01Z242)

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。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 directly connected to core switching nodes. The simulation of EBR scheme under self-similar traffic shows that our scheme could achieve much better performance on the burst dropping rate and its simplicity makes it easy to co-exist with other contention resolution schemes.

关 键 词：冲突规避 边缘电缓存 光突发包 光突发交换 

分 类 号：TN915.02[电子电信—通信与信息系统]