一种适用于变长分组交换的切片式分组转发方案  

Chipped packet forwarding scheme suitable for the length variable packet switch

作　　者：鲍民权[1] 邱智亮[1] 姚明旿[1] 卢卫娜[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2013年第1期1-5,共5页Journal of Xidian University

基　　金："核高基"国家重大专项资助项目(2009ZX01033-003-001);"863"资助项目(2009AA01A335);长江学者和创新团队发展计划资助项目(IRT0852)

摘　　要：提出一种适用于变长分组交换的新型分组转发方案.该方案对变长分组在调度传输时采用切片处理方式,即调度器调度传输的是该分组的一个固定长度切片.该机制能够确保网络内部的较短分组尽快传输完毕,从而降低分组的平均等待时间,减小时延和时延抖动并提高吞吐率.通过理论分析和仿真,表明基于切片调度的转发机制相对于完整分组转发机制在不同的业务模式下吞吐率性能可以改善10%到70%,时延可以降低10%到30%,并且输入分组中短分组所占比例越高,这种改善效果越显著.A new packet forwarding scheme which is suitable for the length variable packet switch is proposed.In this new scheme,a length variable packet is chipped and forwarded as several fragments,i.e.,the basic unit of the forwarding is the fragment.This mechanism can ensure that the short packet in the switch fabric is delivered as soon as possible,thus reducing the average packet delay and delay-jitter and improving the throughput of the network.Theoretical analysis and simulation results show that with the fragment-based scheduling mechanism,compared with the packet-based scheduling,the performance of throughput can be improved by 10% to 70%,and that the delay can be reduced by 10% to 30%.Moreover,the higher the proportion of short packets in the input traffic,the more remarkable improvement is obtained.

关 键 词：变长分组交换 切片调度 吞吐率 时延 时延抖动 交换 

分 类 号：TN919.21[电子电信—通信与信息系统]