光突发交换网络中基于突发包分片并考虑路径关联的可控重传方案  

Burst-Segmentation-Based and Path-Correlation-Considered Controlled Retransmission Scheme in Optical Burst Switching Networks

作　　者：侯睿[1] 何婷婷[2] 毛腾跃[1] 

机构地区：[1]中南民族大学计算机科学学院,湖北武汉430074 [2]南京邮电大学计算机学院,江苏南京210046

出　　处：《光学学报》2013年第7期148-153,共6页Acta Optica Sinica

基　　金：国家自然科学基金(60841001);湖北省自然科学基金(2011CDB412);国家民委自然科学基金(12ZNZ010);武汉市科技计划(2013010501010125);武汉市青年科技"晨光计划"(201150431076)

摘　　要：提出了一种在光突发交换(OBS)网络核心节点中,基于突发包分片并考虑路径关联的可控重传方案。与以往研究相比改进之处在于,所提方法研究了在设定不同重传概率情况下,相同重传概率重传多次以及不同重传概率重传多次的情况,并对重传次数进行了限制,从而实现了对重传概率和重传次数的可控性;同时,还考虑到了路径关联因素对基于分片的可控重传方法的影响,从而克服了以往研究只涉及单路径而不能获取网络拓扑对分片技术影响的局限。利用路径阻塞率和字节丢失率对所提方法进行性能分析,并进行了仿真验证。从仿真结果可以看出,相比于传统方案,重传概率从1开始每减小0.2,突发包的阻塞率就将分别减小13%,24%,16%,6%。A burst-segmentation-based and path-correlation-considered controlled retransmission scheme in optical burst smtching （OBS） core nodes is proposed. The improvements compared with previous researches are that the performance of several times retransmission under the same transmission probability and the different transmission probability situations are evaluated when the values of retransmission probability are different. The number of times for retransmission is limited to realize the controllability for both retransmission probability and retransmission times. In addition, the impact of path correlation on the proposed burst-segmentation-based controlled retransmission scheme is considered to overcome the limitation of previous researches that only refer to single path and cannot capture the effect of network topology. Path blocking probability and byte loss probability are used to evaluate the performance of proposed method, and an extensive simulation is used to validate it. From the results it can be seen that, compared with the conventional retransmission scheme, path blocking probability reduces by 13 %, 24 %, 16 %, 6 % with every decrement of 0.2 for retransmission probability respectively from 1.

关 键 词：光通信 光突发交换 突发包分片 重传 路径关联 

分 类 号：TN929.11[电子电信—通信与信息系统]