The document outlines the potential of network functions virtualization (NFV) in enhancing 5G networks' radio access and core elements, emphasizing its benefits for operators and manufacturers. It details how NFV supports rapid network slicing and on-demand deployment, while enabling flexibility and efficiency in managing diverse service requirements. With NFV, 5G networks can autonomously adapt to varying traffic demands, facilitating new business opportunities through optimized service delivery.

1. Virtualization in 5G Network
ITU & 3GPP-driven5Ghas huge potential inutilizingNetworkFunctionsVirtualization(NFV) to
enhance radioaccessand core networkelements.Manyoperatorsandequipmentmanufacturers
have alreadyinvestedheavilytoreapthe benefitsof thistechnology.
5G mobile networkservicescanbe classifiedintoEnhancedMobile Broadband(eMBB),Ultra-
reliable andLow-latencyCommunications(uRLLC),andMassive Machine Type Communications
(mMTC) categories.These servicesare plannedtomeetthe requirementsforhighbandwidth
applications,latency-sensitive services,afuturisticmachine driven society,andthe Internetof
Things.
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The service-driven5Gnetworkarchitecture isthusbeingdesignedtomeetdiversifiedservice
requirements. NetworkFunctionsVirtualization(NFV)isthe bestfittosupportstringentaccess,
transport,and core networks'demandsof 5G networks.Itenablesfastnetworkslicingand,on-
demanddeploymentof networknodesandservice elements.
Most LTE networkservice providersare familiarwithNFV andare eitheralreadyusingNFV to
provide LTE EvolvedPacketCore (EPC) functionsinlive networksorplantodo so. Operatorsare
usingNFV forcapacity expansion,co-hostingwithnativedeploymentsandsmall-scale roll-outs.With
thisexperience,NFV isall settobe the preferredchoice for5G deployments.WithNFV,service
providerscanre-use existingcompatiblehardware andnew additionswillbe reusableastechnology
evolves,providingasignificantreturnonCapEx investmentoverthe time.
NFV offersthe abilitytoinstantiatenetworkfunctionsinreal time withinthe operator’scloud
infrastructure.Itpromisesincreasedautomation,operational efficiency,andagilitywithreduced
CapEx.A 5G-readyNFV core mayopenthe doors fornew businessopportunitiese.g.invertical
segments.
One of the keyarchitectural changesin3GPP's 5G networkisControl andUser Plane Separationof
EPC nodes(CUPS) whichprovidesthe architecture enhancementsforthe separationof functionality

2. inthe EvolvedPacketCore’sSGW, PGWand TDF. Thisevolutionenables flexiblenetwork
deploymentandoperation,bydistributedor centralized deploymentandthe independentscaling
betweencontrol plane anduserplane functions.NFVisjustrightforsuch architectural deployments.
A growingsetof servicesandfunctionswouldbringamany-foldincrease inconfigurationand
deploymentsteps.Manual stepswillresultinsignificantchallengesfornetworkdeploymentand
operations. 5G networksmustbe self-servingandself-healingwithagile anddynamiccapabilities.
NFV-baseddeploymentarchitectureprovidesapathto achieve this.Itbringsgreaterspeedand
efficiencyinlaunchingnew servicesaswell asreducinglifecyclemanagementcosts.
Witha virtualizednetworkdeploymentframework,operatorswillbe able tomeetthe growing
trafficdemandinnearreal time.Thinkaboutthe peaktraffichours or,days whenthe networkneeds
to be readyto handle manyfoldbandwidthdemandincreasesinreal-time.Withanautomated
trendingandNFV deploymentframework,additional SGWand,PGW control and userplane nodes
couldbe addedas trafficgrowsand removedonce trafficisback to normal.Thisopensanotherdoor
for operatorstouse 3rd party infrastructure withapay-per-usemodelforclouddeployments
5G networksnotonlybring newradiosas namedby3GPP or CUPS but alsoadd anotherchange
callednetworkslicing.Virtualizationiskeytoenable networkslicingfordifferentuse cases.This
change allowsservice providerstooffermultiple serviceswithdifferentperformance requirements.
Each componentor networkslice providesanindependent, virtualized functionof the network
element.Withthisfeature,service providerscancreate networkslicesthatare optimizedforspecific
use cases.One slice couldserve smartphone users,anotherone canserve subscriberslike
autonomousvehicles,While athirdcouldhandle IoTnetworks,andsoon.
Withthe ongoing5G evolution,NFV hasbecome akeyingredientforsuccessful rolloutandservice
deliveryforthe nextdecade.ITservice in the cloudwaskeyforNFV popularitysofar,and 5G will
add to thisboomfor the nextdecade andbeyond.
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