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《光突發(fā)交換網(wǎng)絡(luò)中基于突發(fā)包分段的聯(lián)合沖突解決方法研究-論文.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、激興與光電子學(xué)進(jìn)展51,040602(2014)Laser&0ptoelectronicsProgress~2014{中國(guó)激光》雜志社光突發(fā)交換網(wǎng)絡(luò)中基于突發(fā)包分段的聯(lián)合沖突解決方法研究管愛(ài)紅張海芳李青海。河南工業(yè)大學(xué)信息科學(xué)與工程學(xué)院,河南鄭州450001。河海大學(xué)物聯(lián)網(wǎng)工程學(xué)院,江蘇南京210098摘要光突發(fā)交換(OBS)技術(shù)由于結(jié)合了電的靈活處理和光的高速傳輸,成為構(gòu)建下一代全光互聯(lián)干線網(wǎng)最具前景的交換方式,其單向資源預(yù)留方式導(dǎo)致的突發(fā)包沖突是限制OBS走向?qū)嵱玫年P(guān)鍵?;谕话l(fā)包分段的光緩存沖突解決方法和基于突發(fā)包分段的波長(zhǎng)轉(zhuǎn)換沖突解決方法,首先通過(guò)對(duì)低優(yōu)先級(jí)突發(fā)
2、包進(jìn)行分段解決沖突,然后對(duì)分段后沖突部分突發(fā)包進(jìn)行光緩存或波長(zhǎng)轉(zhuǎn)換降低丟包率。對(duì)基于突發(fā)包分段的光緩存和基于突發(fā)包分段的波長(zhǎng)轉(zhuǎn)換兩種沖突解決機(jī)制的性能進(jìn)行了比較研究,仿真結(jié)果顯示:兩種機(jī)制都能夠有效地降低整個(gè)網(wǎng)絡(luò)的丟包率。當(dāng)網(wǎng)絡(luò)負(fù)荷較高時(shí),采用基于突發(fā)包分段的光緩存方法對(duì)降低突發(fā)包的丟失率效果比較明顯;當(dāng)網(wǎng)絡(luò)負(fù)荷較低時(shí),采用基于突發(fā)包分段的波長(zhǎng)轉(zhuǎn)換方法能夠更加有效地降低突發(fā)包的丟失率。關(guān)鍵詞光通信;光突發(fā)交換;優(yōu)先級(jí);突發(fā)包分割;光緩存;波長(zhǎng)轉(zhuǎn)換中圖分類號(hào)TN929.11文獻(xiàn)標(biāo)識(shí)碼Adoi:10.3788/LOP51.040602CompositeC0ntenti0nR
3、esolutionMechanismBasedonBurstSegmentationinOpticalBurstSwitchingNetworksGuanAihongZhangHaifangLiQinghai。CollegeofInformationScienceandEngineering,HenanUniversityofTechnology,Zhengzhou,Henan450001,ChinaCollegeofInternetofThingsEngineering,HehaiUniversity,Nanjing,Jiangsu210098,ChinaAbstra
4、ctOpticalburstswitching(OBS)isapromisingsolutionforthenextgenerationbackboneinternetwhichcanexploitthehugybandwidthofdensewavelengthdivisionmultiplexing(DWDM)technologyandtheflexibilityofelectronicswitching.AnimprotantissueinOBStechnologyisburstcontentionwhichcausesperformancedegradation
5、.Theopticalbufferresolutionbasedonsegmentationsegmentsburstfirstly,andthenthesegmentedburstisbuffered.Thewavelengthconversionconflictresolutionbasedonsegmentationsegmentsburstfirstly,andthenthesegmentedburstiswavelengthconverted.Comparisonbetweenthetwocontentionresolutionsismade.Theresul
6、tofcomparisonshowsthatwhenthenetworkloadishigh,theopticalbufferconflictresolutionbasedonbustsegmentationcanefficientlyreducetheburstlossprobability.Whenthenetworkloadislow,thewavelengthconversionconflictresolutionbasedonbustsegmentationcanefficientlyreducetheburstlossprobability.Keywords
7、opticalcommunications;opticalburstswitching;priority;burstsegmentation;opticalbuffer;wavelengthc0nversiOnoCIScodes060.1155;060。2330;060.4510;060,42501引言光交換是未來(lái)網(wǎng)絡(luò)發(fā)展的方向,目前已提出了3種光交換技術(shù),即光電路交換、光分組交換和光突發(fā)交換(OBS)’。在OBS網(wǎng)絡(luò)中,突發(fā)控制包(BCP)在每一個(gè)突發(fā)數(shù)據(jù)包(BDP)發(fā)送之前進(jìn)入網(wǎng)絡(luò),并在該BDP將要通過(guò)的核心節(jié)點(diǎn)為其預(yù)留帶寬資源,BD