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ID:23198728
大小:3.75 MB
页数:76页
时间:2018-11-05
《遗传算法及其在gsm移动通信网直放站分布优化中的应用研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、.=-^tChinesecommunicationindustry,thespeedofmobilesystemconstructionisbecomemoreandmorefaster.GSMnetworkplaysanimportantroleinmobilecommunicationsystemsnowadays.Duringthedevelopmentofthemobilecommunication,thecompetitionofmobilecommunicatemarketsisfireceandthesubscriberswanttoenjoythemobilese
2、rviceofgoodqualityatanytimeandanywhere.ThequalityofnetworkbecomesthekeywhetherthenetworkoperatorCanoccupythemarketandsucceed.Thereforetheserviceprovidersstarttodeploytherepeatersoutdoors,indoorsandundergroundwherethemobilesignalCannotcoverpreviously.Thefinalaimofnetworkoptimizationistokeepthe
3、networkinthebestrunningstateandgetthebesteconomicbenefits.Duringthenetworkoptimizationusingtherepeater,thenetworkcoverageandthefinancialcost[fietwoevaluationcriteriasofthenetworkandalsothesurvivalofmobileserviceprovider.Sincebasicgeneticalgorithmoptimizationprocess”direction”andeasily”prematu
4、re”phenomenon,thelargeamountofcalculationandeasilyintoa”localoptimalsolution”,theimprovedgeneticalgorithmoperatorsareusedinthispaper.Theintroductionofhighqualityandselectionstrategy,simplexcrossoveroperator,fitnessdensityvariationfoundthemedianandclimbingalgorithmmethodwerealsoinspiredtoaccel
5、eratetheconvergencewithoutleadingtopremature.FinallytheimprovedGeneticAlgorithmswereappliedtosolvetherepeatorplacementinthepapertoacceleratethespeedandavoidprematuretwo.TheobjectfunctionintheoptimalalgorithmisdefinedaccordingtothetwoimportantkeysofGSMnetworkincludingnetworkcoverage,portfolioc
6、overandthefinancialcostoftherepeateLThispapercombinedspecificparametersofrelatedofGSMsystemwithobjectfunction,optimizedtheplacementofrepeaterusingimprovedgeneticalgorithm,andfoundanavailavleplanofrepeaterplacement.Itabtainedhighercoverageratioandwithlowercost,andobtainedcoverageresultofarepea
7、terwhichisinagivenarea·bysimulationofthe—III—东北大学硕士学位论文Abstractcomputer.Thesinmulationresuiltsshowedthatthecoverageradtiocanreachabove90%fortherepeaterswhichisinagivenareawithlessquantity.Keywords:GSMmobilecommunicationsysterm;networkoptimiza
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