| 有优先权的光突发交换中光缓存的性能分析 |
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| 引用本文： | 张民,张帆,王建,叶培大.有优先权的光突发交换中光缓存的性能分析[J].光子学报,2002,31(10):1190-1195. |
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| 作者姓名： | 张民 张帆 王建 叶培大 |
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| 作者单位： | 北邮-北电联合研究中心,北京邮电大学125#,100876 |
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| 摘 要： | 分析了配置有限数量光纤时延线(FDLs)和优先权机制的光突发交换(pOBS)网络性能,建立了pOBS的网络模型和排队模型;并以模型为基础,比较了各级别数据包的排队等延时与FDLs单位、负荷强度比例的关系;比较了有和无FDLs时,包丢失率与FDLs单位、FDLs深度、系统负荷强度以及波长数的关系.研究发现;高优先级数据包的平均延时远小于其它数据包,负荷强度越大平均延时也越大,高优先级数据包的比例越大则低优先级数据包的延时越大且丢失率越高,加入有限数量和适当深度的FDLs、减小FDLs最小单位、增加波长数都能减小数据包的平均排队延时和丢失率.
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| 关 键 词： | 光网络 光突发交换(OBS) pOBS 光缓存 光纤时延线(FDLs) WDM |
| 收稿时间： | 2001/12/7 |
| 修稿时间： | 2001年12月7日 |
PERFORMANCE OF PRIORITIZED OPTICAL BURST SWITCHING WITH LIMITED FIBER DELAY LINES |
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| Zhang Min,Zhang Fan,Wang Jian,Ye Peida BUPT Nortel Joint Research Center Beijing Univ of Posts & Telecomm,PO Box #,Beijing China.PERFORMANCE OF PRIORITIZED OPTICAL BURST SWITCHING WITH LIMITED FIBER DELAY LINES[J].Acta Photonica Sinica,2002,31(10):1190-1195. |
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| Authors: | Zhang Min Zhang Fan Wang Jian Ye Peida BUPT Nortel Joint Research Center Beijing Univ of Posts & Telecomm PO Box # Beijing China |
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| Institution: | Zhang Min,Zhang Fan,Wang Jian,Ye Peida BUPT Nortel Joint Research Center Beijing Univ of Posts & Telecomm,PO Box 125#,Beijing China 100876 |
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| Abstract: | The queuing models of prioritized Optical Burst Switching(pOBS)with and without limited Fiber Delay Lines(FDLs) are established.Based on these queuing models,the performance in a pOBS network is compared,in case of different FDL unit,buffer depth,load intensity and wavelength number.Besides,the relationship among queuing delay,FDL unit and the proportion of all packet classes is investigated.The validation of limited FDL in pOBS is proved. |
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| Keywords: | Optical networks Optical Burst Switching (OBS) Optical buffering Fiber Delay Line (FDL) WDM |
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