Riverstone-networks 9500 Manuel d'utilisateur télécharger pdf (Page 3)

Alcatel-Lucent 9500 Microwave Packet Radio North American Markets 3

Toremaincompetitiveintherapidly

changingmobilemarketplace,operators

needtodeliverprotablenewservices

whilereducingbackhaulcosts.Users

areexpandingtheirdemandsbeyond

basicvoiceanddataserviceslikeinstant

messagingandemail;theywantmore

delay-sensitiveapplications,suchas

mediastreamingandreal-timemulti-

media.Tosupporttheseservices,

broadbandwirelesstechnologies,

includingHigh-SpeedDownload

PacketAccess(HSDPA)andEVDO,

areprovidinghighertransmission

speedsandpacketinterfaces.

However,backhaulnetworksmust

alsoevolvetomeetthesenewband-

widthdemandsatacceptablecost

points.IPtransportoffersavaluable

solutiontohelpoperatorstransform

networksandbettermanagegrowing

broadbandtrafc.

TheAlcatel-Lucent9500MPRoffers

arevolutionarywayoftransporting

packetsnatively.Usinganinnovative

approachtodeliverthequalityof

servicerequiredforeachtrafctype

dramaticallyreducesoperating

expenditures(OPEX)andimproves

theconnectivityofEthernetand

legacyT1basestations.Asaresult,

thenetworkcaneasilyandefciently

accommodaterapidgrowthin

multimediatrafc,withsmooth

migrationfromTDMtoIP.

Nativetransportofpackettrafc

producesacleargaininscarceradio

resources;whilepacketsolutionscan

absorbTDMtrafcefciently,TDM

solutionscannothandlepacket

trafccost-effectively.

Figure1comparesTDMtransport

andpacketaggregation.

Meeting a key backhaul challenge –

the rapid growth of multimedia trafﬁc

Packet

Radio Node

Aggregated Packet Trafﬁc

Packets

Ethernet

“Data Aware”

Packet Aggregation

ATM NxE1

TDM NxE1

Cell Site

Cell Site

Cell Site

Cell Site

TDM Radio

Node

Overlay of Multiple Trafﬁc

TDM

NxE1

Ethernet

2G

3G

E1 Stacking

ATM NxE1

TDM NxE1

2G

3G

Figure 1. TDM transport versus packet aggregation

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