Memo Style
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1 Mariano Molina Garcia From: Eduardo Alvarez Sent: Monday, May 18, 2015 9:19 AM To: Raquel Berlanga; Jesus Urda Muñoz; David De la Fuente Martinez; Elena Garcia Couto; NDO Ops ECO DL Subject: RE: OSS based scaling and best server areas Hola Elena, As our colleagues comment, there is no changes in the Best server areas of the cells when using the OSS Based. But checking the pictures you’ve sent, please verify the RSRP distribution that you have into your project because having few samples in the distribution can be introducing strange behaviors. For instance, the sites within the blue circles seem to have close to 100% of the samples in very strong values. Normally, in those cases, the RSRP distribution has very few samples and the majority of them are located in the highest ranges, producing those red areas. Regarding the size of the best server area, you can create a traffic map based on Timing advance, and check the values you obtain in the Unallocated Erlang report. That can give you an estimation about the deviation between your best server areas of the project and the reality. But in any case, there is nothing we can do with it but changing the original propagation model.
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Transcript of Memo Style
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1Mariano Molina Garcia
From: Eduardo AlvarezSent: Monday, May 18, 2015 9:19 AMTo: Raquel Berlanga; Jesus Urda Muoz; David De la Fuente Martinez; Elena Garcia
Couto; NDO Ops ECO DLSubject: RE: OSS based scaling and best server areas
HolaElena,Asourcolleaguescomment,thereisnochangesintheBestserverareasofthecellswhenusingtheOSSBased.Butcheckingthepicturesyouvesent,pleaseverifytheRSRPdistributionthatyouhaveintoyourprojectbecausehavingfewsamplesinthedistributioncanbeintroducingstrangebehaviors.Forinstance,thesiteswithinthebluecirclesseemtohavecloseto100%ofthesamplesinverystrongvalues.Normally,inthosecases,theRSRPdistributionhasveryfewsamplesandthemajorityofthemarelocatedinthehighestranges,producingthoseredareas.Regardingthesizeofthebestserverarea,youcancreateatrafficmapbasedonTimingadvance,andcheckthevaluesyouobtainintheUnallocatedErlangreport.Thatcangiveyouanestimationaboutthedeviationbetweenyourbestserverareasoftheprojectandthereality.Butinanycase,thereisnothingwecandowithitbutchangingtheoriginalpropagationmodel.
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2BR,EduFrom: Raquel Berlanga Sent: Sunday, May 17, 2015 6:25 PM To: Jesus Urda Muoz; David De la Fuente Martinez; Elena Garcia Couto; NDO Ops ECO DL Subject: RE: OSS based scaling and best server areas HiElena,Afterscalingthereisnotarealpropagationmodelassociatedtothepropagationformula(Leebydefault)aswhentheECOprojectiscreatedthateachcellhasapredeterminedvalueforslopeandtherestofcomponents.BR,RaquelFrom: Jesus Urda Muoz Sent: sbado, 16 de mayo de 2015 16:44 To: David De la Fuente Martinez; Elena Garcia Couto; NDO Ops ECO DL Subject: RE: OSS based scaling and best server areas HiElena,Davidisrightandthebestserverareasarenotmodifiedinthescalingprocess.Alsoabriefexplanationonhowthescalingmethodisworking:
InafirststepthecoverageisscaledinthebestservedpixelsofeverysectorusingtheRSRPdistribution.ThismeansthatthebestserversignalisscaledtomatchtheimportedRSRPdistribution.Additionallyallremainingsignalsofeachpixelarealsoscaledbythesameamount.
Laterthescalingisdoneforpairsofvictiminterfererifadjustinterferenceischecked.InthisstepforeveryinterfererofasectorthesignalcomingfromthatinterfererisscaledaccordinglytomatchtheC/Idistribution.
BestRegards,JessUrdaFrom: David De la Fuente Martinez Sent: 16 May 2015 06:01 To: Elena Garcia Couto; NDO Ops ECO DL Subject: RE: OSS based scaling and best server areas HiElena,AsfarasIknow,bestserverareasarenotmodifiedafterscalingRegardsDavidFrom: Elena Garcia Couto Sent: Friday, May 15, 2015 10:31 PM To: NDO Ops ECO DL Subject: OSS based scaling and best server areas
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3Dearall,IamcurrentlydeliveringanECOtrainingandyesterdaythereweresomediscussionsabouthowOSSbasedscalinginECOdealswithbestserverareas.IwouldappreciateifyoucouldhelpmetounderstandhowisECOcalculatingthisandtakingthemintoaccount.Ourconcernis:afterscalinginternalpredictionswithOSSdata,timingadvanceinfoisshowingthatourRSRPvalueswerehigherthanthepredictionswevecalculatedonafirststep.Inthatcase,wesupposethosebestserverareasshouldbemodifiedaccordingtothevaluesafterscaling(wearehavingnowstrongestsignallevelswhichleadstobiggerbestserverareaswhichshouldbetakingintoaccountsincetheremightbenewdominance/interferenceissues)Hassomebodyanexplanationabouthowisitworking?Iattachacoupleofsnapshotsjusttoillustratemyexample:Predictionsandbestserverareasbeforescaling
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4Andafterscaling:
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6Thanksinadvance.Bestregards,Elena.
ELENA GARCIA COUTO Services Engineer GCD RAN Global Competence Domains, GSO Business Unit Global Services Ericsson Severo Ochoa 55, Ericsson Building 29590, Campanillas, Mlaga, Spain Mobile +34618603199 [email protected] www.ericsson.com
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