| 光突发交换中支持区分业务的混合封装和改进的头部丢弃策略 |
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| 引用本文： | 张治中,雒江涛,曾庆济,王建新,蒋铭,赵焕东.光突发交换中支持区分业务的混合封装和改进的头部丢弃策略[J].光子学报,2004,33(10):1200-1203. |
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| 作者姓名： | 张治中 雒江涛 曾庆济 王建新 蒋铭 赵焕东 |
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| 作者单位： | 上海交通大学先进光网络国家重点实验室,上海,200030;重庆邮电学院通信工程学院,重庆,400065;上海交通大学先进光网络国家重点实验室,上海,200030 |
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| 基金项目： | SupportedbytheNational 86 3Plan(No .2 0 0 1AA12 10 73)andNaturalScienceFoundation(No.6 9990 5 4 0 ) |
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| 摘 要： | 介绍一种在光突发交换网中支持业务QoS,并减少分组到达乱序的突发包混合封装机制.通过将不同级别的分组组成相对独立的段,并进而封装到同一个突发包里,可减少分组到达乱序.结合改进的头部丢弃策略,可克服尾部丢弃法中存在的虚假冲突问题,能真正改善分组丢弃率.仿真结果表明,混合封装在结合改进的头部丢弃法之后,能很好地应用于具有QoS要求的光突发交换网中.
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| 关 键 词： | 光突发交换 分段 混合封装 头部丢弃 服务质量 |
| 收稿时间： | 2003-09-24 |
Hybrid Assembly and Improved Head-dropping Scheme for Service Differentiation in Optical Burst Switching |
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| Affiliation: | (1 Key Lab on Advanced Optical Networking Technology, Shanghai Jiaotong Univ.,Shanghai 200030) (2 Dept.of Commun.Engineering,Chongqing Univ.of Posts and Telecomm.,Chongqing 400065) |
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| Abstract: | To support QoS and decrease the disorder of packet arrivals, a new hybrid assembly scheme, in which the low and high packet classes are aggregated into one burst simultaneously, is presented for optical burst switched (OBS) networks. Once contention occurs, an improved head-dropping policy, which can overcome the limitations associated with the tail dropping policy, is adopted to drop the overlapping packets. Simulation results demonstrate that hybrid assembly scheme, together with the improved head-dropping policy, can be well used in OBS networks with QoS requirement. |
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| Keywords: | Optical burst switching Segmentation Hybrid assembly Head-dropping QoS |
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