简介：Thisletterreportsastudyofahybridburstassemblyandahybridburstlossrecoveryscheme(delay-basedburstassemblyandhybridlossrecovery(DBAHLR))whichselectivelyemploysproactiveorreactivelossrecoverytechniquesdependingontheclassificationoftrafficintoshorttermandlongterm,respectively.TrafficpredictionandsegregationofopticalburstswitchingnetworkflowsintothelongtermandshorttermareconductedbasedonpredictedlinkholdingtimesusingthehiddenMarkovmodel(HMM).ThehybridburstassemblyimplementedinDBAHLRusesaconsecutiveaverage-basedburstassemblytohandlejitterreductionnecessaryinreal-timeapplications,withvariationsinburstsizesduetothenon-monotonicnatureoftheaveragedelayhandledbyadditionalburstlengththresholding.ThisdynamichybridapproachbasedonHMMpredictionprovidesoverallalowerblockingprobabilityanddelayandmorethroughputwhencomparedwithforwardsegmentredundancymechanismorpurelyHMMprediction-basedadaptiveburstsizingandwavelengthallocation(HMM-TP).

简介：Asthewavelengthdivisionmultiplexing(WDM)technologymaturesandthedemandsforbandwidthincrease,survivabilitybecomesmoreandmoreimportantingeneralizedmulti-protocollabelswitching(GMPLS)controlledintelligentopticalnetworks(IONs).Therearegreatintereststostudytheperformanceofrestorabilityunderonecertainconnectionmanagementstrategy.Andstudiesintheproblemofprovidingrecoveryfromlinkfailuresundertwodifferentresourcereservationschemes,forwardreservationprotocols(FRPs)andbackwardreservationprotocols(BRPs),arepresented.Theyareexaminedfromthepointofviewofconnectionblockingprobability,restorabilityandaveragerecoverytime.Thetwodifferentconnectionmanagementschemesandthesurveyofdifferentrecoveryschemesarefirstpresented.Theperformanceoftheserecoverystrategiesisanalyzedandcomparedboththroughtheoreticalanalysisandsimulationresults.ThemainstressedideaisthatusingBRPsgivesthebestperformanceintermsofrestorabilityandblockingprobabilityinrestorableGMPLSnetworks.

简介：Weexperimentallydemonstrateall-opticalclockrecoveryfor100Gb/sreturn-to-zeroon–offkeyingsignalsbasedonamonolithicdual-modedistributedBraggreflector(DBR)laser,whichcanrealizebothmodespacingandwavelengthtuning.Byusingacoherentinjectionlockingscheme,a100GHzopticalclockcanberecoveredwithatimingjitterof530fs,whichisderivedbyanopticalsamplingoscilloscopefromboththephasenoiseandthepowerfluctuation.Furthermore,fordegradedinjectionsignalswithanopticalsignal-to-noiseratioaslowas4.1dBanda25kmlongdistancetransmission,good-qualityopticalclocksareallsuccessfullyrecovered.