Itg521 2010 Lte Son Unibremen

8/7/2019 Itg521 2010 Lte Son Unibremen

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XiLiandLiang Zhao

ComNets UniversityofBremen06.October2010

OverviewandResearchAspectsofLTESON

ITGFG5.2.1WorkshopStuttgart


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Outline

MainDriversforSONinLTE

IntroductionofLTESON

StandardizationStatus

SONFunctionalities

SONArchitecture

RelatedWorkandResearchProjects

MainResearchAspectsofLTESON

RadioNetwork

TransportNetwork

Conclusions


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Outline




SONFunctionalities SONArchitecture



RadioNetwork

TransportNetwork

Conclusions


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LongTermEvolution

eNB

eNBeNB

eNB

MME

S-GW / P-GW

MME

S-GW / P-GW

EPC (Evolved Packet Core)

E-UTRAN

S1

X2

eNB:EUTRANNodeBMME:MobilityManagementEntitySGW: ServingGatewayPGW: PDN(PacketDataNetwork)Gateway

The3GPPintroducesLong

TermEvolution (LTE)

highthroughput

lowlatency

increasedsystemcapacity

Improvedcoverage

performance

fortheNextGeneration

MobileNetwork (NGMN)


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RolloutoftheLTEleadsto

rapidlyexpandingnumberofBaseStations(newsites)

paralleloperationof2G,3GandLTE

muchhighercomplexityinnetworkinfrastructureandnetwork

management(Operation&Maintenance)

SelfOrganizingNetwork(SON)aimsto

configureandoptimizetheLTEnetwork

automaticallyby

SelfConfiguration

SelfOptimization

SelfHealing

(Source:SOCRATESProject)


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MainObjectivesofSON

Network

Planning

Network

Planning Network

Deployment

Network

Deployment Network

Optimization

Network

Optimization Network

Maintenance

Network

Maintenance

SelfConfiguration functions

reduceCAPEX

SelfConfiguration functions

reduceCAPEXSelfOptimization&energysaving

reducesOPEX

SelfOptimization&energysaving

reducesOPEX

SelfOptimization andSelfHealing

functionsimproveuserexperiences

SelfOptimization andSelfHealing

functionsimproveuserexperiences


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Outline







RadioNetwork

TransportNetwork

Conclusions


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3GPP hasintroducedSONalongitsstandardizationpathas

requiredfeaturesforLTEdeployments

Release8

eNB Selfconfiguration S1,X2interface

AutomaticNeighborRelation

AutomaticPhysicalCellIDassignment Selfoptimization

Basicmobilityloadbalancing

MultivendorSONinterworking

Release9

Coverage&Capacityoptimization

Mobilityloadbalancing

Mobilityrobustoptimization

RACHoptimization

AnimportantsourceofLTESONdevelopmentistheindustry

forumNGMN (NextGenerationMobileNetworks)


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3GPPSpecificationsforSON

3GPPTS36.902,Evolved UniversalTerrestrial RadioAccessNetwork(EUTRAN);SelfConfiguring andSelfOptimizing Network (SON)UseCases andSolutions

3GPPTS32.500,Telecommunication management;SelfOrganizing

Networks(SON);Concepts andrequirements

3GPPTS32.501,Telecommunication management;SelfConfigurationofNetwork Elements;Concepts andIntegrationReference Point(IRP)Requirements

3GPPTS32.502,Telecommunication management;SelfConfigurationofNetwork ElementsIntegrationReference Point(IRP);InformationService(IS).

3GPPTS32.511,Telecommunication management;AutomaticNeighbour Relation(ANR)management;Concepts andrequirements

3GPPTS32.690,Telecommunication Management;InventoryManagement(IM);Requirements.


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Functionalities ofSON

SelfConfigurationSelfConfiguration

plugandplayofneweNBs

automaticneighborlists

selfconfiguringRF&

transport

.

SelfOptimizationSelfOptimization

coverage&capacityopt.

neighborlistopt.

interferencecontrol energysavings

automatichandoveropt.

.

SelfHealingSelfHealing

automaticdetectionof

failures

automaticadjustmentof

parameters

healingschemes

MainBenefits


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SONArchitecture

Source:Nomor Research:WhitePaper"SelfOrganizing

Networks(SON)in3GPPLongTermEvolution"


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The SOCRATES (SelfOptimisation andselfConfiguRATion in

wirelEss networkS)Project

EU7thFrameworkProgram

Jan.1,2008 Dec.31,2010

Projectobjectives

Developmentofmethodsandalgorithmsforselforganization

Specificationoftherequiredmeasurements

Validationanddemonstrationofthesolutions

Assessmentoftheoperationalimpact

Inputto3GPPstandardizationandNGMNactivities


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The Endtoendefficiency(E3) Project

FP7ECIntegratingProject(IP)

Jan.1,2008 Dec.31,2009

Projectobjectives:

Design,develop,prototypeandshowcasesolutionsto

guaranteeinteroperability,flexibilityandscalabilitybetweenexistinglegacy

andfuturewirelesssystems

managetheoverallsystemcomplexity

ensureconvergenceacrossaccess

technologies,businessdomains,regulatory

domainsandgeographicalregions


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Contributionsbydifferentequipmentvendors,independents,andITvendors

Source:from actix


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Outline







RadioNetwork

TransportNetwork

Conclusions


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GeneralconsiderationsforallSONfunctions

DefinerequiredmeasurementsattheeNB andUE

Definetherequiredmeasurementparameters

Definethemeasurementfrequencyforeachparameter

Definealgorithmstotriggerparameteradjustments

Determinethethresholdstotriggerparameteradjustments

Determinethefrequencyofparameteradjustments

DefinerulesofcoordinationandcooperationamongdifferentSONfunctions

DesignSONarchitecture

CentralizedSON,ordistributedSON,orhybridSON


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MainResearchAspectsofLTESON RadioNetwork

MobilityLoadBalancingOptimization:tooptimizecellreselection/HO

parameterstocopewiththeunbalancedtrafficload

Whatshallbetheproperloaddefinition?

radioload,transportnetworkload,oreventheprocessingload

Splitbetweenuplinkanddownlink

SplitbetweendifferentQCIs

Algorithmforloadbalancing

Thealgorithmcanbebasedonradioload,ortransportnetworkload

orbothofthem

Ifbothradioloadandtransportnetworkloadareconsidered,which

onewillhavehigherpriority?

ThealgorithmshallalsoconsiderdifferentiationamongQCIs

Howtoadjustparametersforcellreselection?


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CoverageandCapacityOptimization:tooptimizethenetworkcoverage

andmaximizethesystemcapacity

Solutionstodetectthecoverageandcapacityproblemsautomatically

basedoneNB measurementsandUEreports

Designaradioplanningtool tosolvetheproblems

Interferencereduction

MobilityRobustOptimization:toautomaticallyadjustthemobility

parameters

Solutionstosolvethemobilityproblems,e.g.

Toidentifyanonsuitablecell

Toidentifyproblematicsettingsofcellselection/reselectionparameters MinimizeHOs whenaUEistransitedfromidletoactivemode


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EnergySaving: tocutonoperationexpensesbyenergysaving

Switchoffcells (especiallyneededwhenalargernumberof

HomeeNBs aredeployedinthenetwork)

Mainissue:whentoactiveanddeactivatetheeNBs andhow?

Adaptthetransmissionpower

Adaptthetransmissionpowerwhilealsoensuringnoinfluenceon

thecoverage,handoverandloadbalancing

Adaptthemultiantennaschemes:someoftheantennascan

beswitchedofftosavethepower

AdaptamongSIMO,MIMO,Beamforming toachievethe

maximumcapacitywiththeminimumtransmissionpower


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MainResearchAspectsofLTESON TransportNetwork

IntroductionofSONfortheLTETransportNetwork

Tooptimizethetransportresources(i.e.capacity)utilization

Tosavetheoperationcosts(formanualconfigurations)and

bandwidthcostswithoptimizedresourceutilization

PossibleAspects:

AutomatictransportQoS optimization

Automatictransportcapacityallocation

Loadbalancinginthetransportnetwork(e.g.applyingtraffic

engineeringmethods)

Transportadmissionandcongestioncontroloptimizations


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MainResearchAspectsofLTESON TransportNetwork

TransportSONfunctions: Dynamicbandwidthallocation

Bandwidthallocationshallfollow thechangesintrafficload

estimatingeffectivebandwidth

whentotriggerthebandwidthupdateandhow

DynamictuningofQoS parameters

e.g.DiffServ modelparameters,schedulerparameters,buffermanagementparametersperQoS class

Optimalconfiguration/reconfigurationofeNB connectivitywiththeSGW

fortheMultiS1scenario(i.e.oneeNB connectedwithmultipleGWs),howtoconfigure/reconfigureincaseofoneSGWfails

Optimalloadbalancing

e.g.toapplyMPLS(Multiprotocol LabelSwitching) Trafficengineeringmethod


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Outline







RadioNetwork

TransportNetwork

Conclusions


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Conclusions

SONisapromisingapproachtosignificantlyreducethenetwork

installationandoperationcosts,andaswellcanimprovethe

userexperiences

3GPPandNGMNhavedefinedasetofLTESONusercasesand

associatedSONfunctions

FurtherResearchesondifferentusercasesandSONfunctions

areneededfortheLTE

LTERadioSON

LTETransportSON


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References

1. 3GPPTS36.902,EvolvedUniversalTerrestrialRadioAccessNetwork(EUTRAN);SelfConfiguringandSelfOptimizingNetwork(SON)UseCasesandSolutions

2. 3GAmericas:TheBenefitsofSONinLTE,December2009

3. Nomor Research,WhitePaper:"SelfOrganizingNetworks(SON)

in

3GPP

Long

Term

Evolution

4. NEC,WhitePaper:"SelfOrganizingNetwork"

5. Motorola,whitepaper:"LTEOperationsandMaintenanceStrategy UsingSelfOrganizingNetworkstoReduceOPEX"


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ThankYouforyourattention!

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Itg521 2010 Lte Son Unibremen

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