第1章 移动数据网络概述.ppt





《第1章 移动数据网络概述.ppt》由会员分享,可在线阅读,更多相关《第1章 移动数据网络概述.ppt(28页珍藏版)》请在淘文阁 - 分享文档赚钱的网站上搜索。
1、移动数据网络及应用Mobile Data Networks and Applications刘志敏L0Wirelessbecamethedominantaccesstechnologyin2002nIttookacenturytoinstalltheworldsfirst850millionphonelines;850millionmorelinesoverthenext15-20yearsnTherearemorethan1330millionwirelesssubscribersintheworldtodaynActualgrowthofwirelessusershasconsistent
2、lyexceededforecastsSource:ITU.1InternetisdrivingthegrowthofinfrastructureforDataAccessn5billione-mailmessagesdeliveredtoday.n100millionpeoplewilllogontothenettodayandchoosefrom1.4billionwebpages.nInthenextyear,Internettrafficwilldouble.nMorethan150millionadditionalInternetuserswillcomeon-lineinthene
3、xtyear.nEnterprisedatatrafficisshiftingduetoInternet/Webnfrom80%internal,20%externalnto20%internal,80%external.2butoverallwirelessdatagrowththusfarhasbeenslownOnlyafewmillionusewirelessdatanResultssomewhatbetterinJapan,Korea,andEuropenTherearethreemajorroadblocks:TerminalsandData RatesLack ofeffecti
4、veStandardsLack ofApplicationInfrastructure33G+/4G Networks802.11 Networks3G+/4G Networks802.11 Networks802.16NetworksTherearepowerfulforcesthatwilldrivethegrowthofwirelessdataEnablingNetworkTechnologyEnablingTerminalsTechnologyNew/Emerging ApplicationsContent DeliveryMessagingLocation-based Service
5、sM-CommerceExisting Applicationsmoving to the web4Evolutionfrom2Gto4Gnetworks5NetworkArchitectureToday:GSMCellular(a2G+network)Base StationControllerWireless Access NetworkBase StationsAirInterfaceMobile VoiceSwitchMobile“Router”(SGSN)Mobile“Router”(GGSN)InternetPSTNWirelessCore NetworkUser Profiles
6、&Authentication(HLR)Voice and DataPacket DataCircuit VoiceWired Access802.11Access Point6NetworkArchitectureTomorrow:3GwithAll-IPBackboneMobile AccessRouterWirelessAccess NetworkIPBase StationsGatewayTelephone NetworkWirelessCore NetworkUser Profiles&Authentication(HLR)3G AirInterfaceWired Access802
7、.11IP IntranetIP IntranetProgrammableSoft switchApplicationServer802.11Access PointAccess PointInternet7NetworkArchitectureoftheFuture:IntegratedPacketDataArchitectureCore InternetBackboneAuthenticationPresenceLocationAggregationRouterAggregationRouterAggregationRouterAccessRouterAccessRouter3G Cell
8、ularNetworksRadioControllerAccessRouterUrbanNetworksHomeNetworksEnterpriseNetworks4GRadiosAd HocNetworks4G AirInterface4GRadios4G AirInterface DSL/Cable High Speed Internet Access Broadband Distribution Networks High Speed Pico Cells 802.11+Local Mobility Packet Voice High Data Rates Outdoor Areas H
9、igh Mobility Mobile Data Allow People to network Self Configuring8KeynetworkingchallengestoachievethearchitectureofthefuturenMobilityManagement:allaspectsrelatedtothemobilityofusersnconversiontoIP-basednmechanismstoenablefasthandoffsandQoSsupportduringlocalizedmovements.nPaging:supportformobiletermi
10、nalsonstandby(e.g.forpowerconserving).nDistributedpagingfunctionalityforincreasedreliability.nMechanismsforlocatinginactiveusersfordeliveringincomingmessagesandcalls.nCommonauthenticationandauthorizationnAllowsuserstoauthenticatethemselvestodifferentaccessnetworksbyusingasinglecredential,nEnablesnet
11、workoperatorstokeepasingle,unifieddatabaseforuserinformation.9Domain-basedMobilityManagementnWhenausermoveswithinadomain(IntraDomainMobility),routingupdatesreachonlyaffectedroutersinthesamedomain.nLoweroverheadandfasterhandoffs.nOtherbenefitsincludeenhancedreliabilityandeasyQoSsupport.DomainMobileRo
12、uterRouterRouterBaseStationBaseStationInternetMobileRouterRouterRouterBaseStationBaseStationMobile IPIntra Domain Mobility Intra Domain Mobility 10Domain-basedPagingnInformationaboutdormantusers(PagingEntry)iskeptatthemobilerouter.nAllbasestationslistentoadomain-specificIPmulticastaddress.nWhenamess
13、ageforadormantuserarrivesatthemobilerouter,IPmulticastisusedtolocatethedormantuserwithinthedomain.MobileRouterRouterRouterBaseStationBaseStationInternetPaging EntryIP MulticastMobileRouterRouterRouterBaseStationBaseStation11Asolutiontocommonauthenticationandauthorization:SuperHLRapproachCDMA Network
14、s802.11 NetworksSuperHLRGSM/UMTSOverlay Data Networks(e.g.HDR)Common ProfileDatabaseProtocolGatewaysCore OperationsCoreServers A common profile data base and authentication server for telecom and Internet users-enables migrating to and roaming between these networks-supports global roaming in cellul
15、ar networks around the world-integrates cellular networks and 802.11 networks12Existing Applicationsmoving to the webM-CommerceMessagingLocation-based ServicesContent DeliveryM-CommerceMessagingLocation-based ServicesContent DeliveryExisting Applicationsmoving to the web3G+/4G Networks802.11 Network
16、s802.16NetworksTherearepowerfulforcesthatwilldrivethegrowthofwirelessdataEnablingNetworkTechnologyEnablingTerminalsTechnologyNew/Emerging Applications13BandwidthEnablesNewApplicationsSpeed,kbps2GCDMA 2.5GGPRS,CDMA 2000EDGEUMTSTransaction ProcessingMessaging/Text AppsVoice/SMSLocation ServicesStill I
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 第1章 移动数据网络概述 移动 数据 网络 概述

限制150内