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1、Wireless Technology Innovation LabsWTI第二代移动通信系统向第三代移动通信系统第二代移动通信系统向第三代移动通信系统 演进演进徐国鑫徐国鑫北京邮电大学无线通信新技术研究室X1Wireless Technology Innovation LabsWTI1 1。 移动通信的发展移动通信的发展2 2。无线网络的演进。无线网络的演进3 3。核心网的演进。核心网的演进4 4。业务的演进。业务的演进2Wireless Technology Innovation LabsWTI移动通信各代典型系统特点典型代表技术术特性第一代AMPS小区制蜂窝窝系统统模拟话拟话 音第二代G
2、SM数字蜂窝窝（ TDMA）数字话话音，数据速率 9.6Kb/S第二代半GPRS通用分组组数字蜂 窝窝数据速率115Kb/s,数据 在线连线连 接第三代W-CDMA宽带码宽带码 分多址， 实现宽带实现宽带 多媒体 业务业务数据速率最高达2Mb/s ，数据在线连线连 接宽带宽带 数 据业务业务后三代3Wireless Technology Innovation LabsWTIInformationServicesSMSChatRoomE-Mailm-stock tradingm-bankingm-cash Picture MailRoute planningMulti-playerGamesMo
3、bile OfficeSchedule ManagementWork flow ManagementElectronic ConferenceFile SharingRadioMusicVideo MailVideo streamingWebInteractive TVTV Conference低低 速速 数数 据据高高 速速 数数 据据WAPWAPGPRSGPRS3G3G99 Q199 Q400 Q401 Q4移动数据业务发展方向4Wireless Technology Innovation LabsWTI频率因素比较频率适用性5Wireless Technology Innovation
4、LabsWTI中国频率资源分配:TD-SCDMA W-CDMA空中接口TDD FDD模式20 + 15 MHz 60 + 60 MHz频段1.6 MHz5 MHz射频带宽可用性现在现在1900 192019802010 202560 MHz60 MHz20 MHz 15 MHzFDD (上行)FDD (下行)TDDTDD 卫星空30 MHz 21102170空188585 MHz15 MHz 双工间隔 190 MHz现在1.6 MHz15 + 85 MHzTDD? TD-SCDMA6Wireless Technology Innovation LabsWTIPowerFrequencyTime
5、FDMAFrequencyPowerTimeFDMA/TDMAFrequencyCDMAPowerTime多址方式多址方式7Wireless Technology Innovation LabsWTI第二代 系统空中接口-GSM 微蜂窝小区结构 工作频段 ：800/1900或900M/1800M 数字化技术-语音信号数字化 新的调制方式-GMSK、QPSK等 FDMA/TDMA 频谱利用率高，系统容量大 便于实现通信安全保密 信道宽度：200khz 每个载波的用户数 8个8Wireless Technology Innovation LabsWTI 用户的接入方式采用码分多址（CDMA） 软容
6、量、软切换，系统容量大 抗多径衰落 可运用话音激活、分集接收等先进技术 频率800/1900 信号带宽 1.25MHz 每个信道的用户数 约为20个 频道划分方式：FDMA+CDMA第二代系统空中接口-CDMA9Wireless Technology Innovation LabsWTI第三代数字蜂窝移动通信系统第三代数字蜂窝移动通信系统3G的主要特点：v 支持移动多媒体业务v 宽带CDMA技术v 高频谱效率v FDMA/TDMA/CDMAv 从电路交换到分组交换v 从媒体(media) 到 多媒体(Multi-media)v 高保密性v 全球范围无缝漫游系统v 微蜂窝结构 主流技术： v W
7、CDMAv cdma2000v TD-SCDMA 10Wireless Technology Innovation LabsWTIMobile Networks Key ComponentMobile Networks Key Component Mobile NetworkMobile NetworkMobile SubscriberMobile SubscriberWireless NetworkWireless NetworkCore NetworkCore Network (This presentation part(This presentation part） ）11Wirele
8、ss Technology Innovation LabsWTINetwork Requirements To Guarantee Services in TransitTo Guarantee Services in Transit For High Speed Data TrafficFor High Speed Data Traffic For Mass SubscribersFor Mass Subscribers For Lower Rate AccountingFor Lower Rate Accountingn nRELIABILITYRELIABILITYn nFLEXIBLY
9、FLEXIBLY n nHIGH THROUGHPUTHIGH THROUGHPUTn nEFFICIENT TRANSMISSIONEFFICIENT TRANSMISSIONn nLOW COST NETWORKLOW COST NETWORKNext slide12Wireless Technology Innovation LabsWTIService Requirements Smooth Migration From 2G to 3GSmooth Migration From 2G to 3G Highlighting Benefits of 3G NetworksHighligh
10、ting Benefits of 3G NetworksAREA SUPPLEMENTATION DURING AREA SUPPLEMENTATION DURING 3G 3G INTRODUCTION PERIODINTRODUCTION PERIOD PROVISION OF 2G KEY SERVICESPROVISION OF 2G KEY SERVICESHIGH SPEED AND MULTIMEDIA HIGH SPEED AND MULTIMEDIA TRANSMISSION TRANSMISSION Next slide13Wireless Technology Innov
11、ation LabsWTINetwork Architecture for Both 2G and 3G Services3G User EquipmentPDC: Personal Digital CellularnOverlay 3G network on 2G (PDC) network nUser profile is shared by both networks3G RAN2G(PDC) RAN2G (PDC) Core Network3G Core Network (3GPP R99)HLR (User Profile)PDCMobile SubscriberFor migrat
12、ion from 2G to 3G14Wireless Technology Innovation LabsWTIDual Network ServiceSupplement 3G areas during introduction period with existing 2G(PDC) Users must activate a network from which they wish to receive Network services. HLR manages activation state and terminates incoming calls to an activated
13、 network.PDCIMTPDC Service Activation Call terminatingIMT ACTIVEMSC/VLR MSCPDC ACTIVEIMT Service ActivationHLRGMSC(2) Incoming Call(3) Interrogation of ACTIVATION STATE(4) Call termination to PDC (Case: B)(4) Call termination to IMT (Case: A)Case:B Activation State PDC ACTIVE IMT INACTIVECase:A Acti
14、vation State IMT ACTIVE PDC INACTIVE(1) PDC Service Activation(1) IMT Service ActivationPDCIMT-2000MSISDN: 090-1234-5678 CASE ACASE BFor migration from 2G to 3G15Wireless Technology Innovation LabsWTIReverse ChargingReverse charging service enables users to access specified access points at no charg
15、e. According to registration of free HTTP addresses beforehand by contents providers, billing filter checks the HTTP address of packet data. Contents ProviderGGSNSubscriber ASGSNRNCBilling FilterNORMAL RATEFREEHTTPTCPIPCHECK http:/www.yahoo.co.jphttp:/www.docomo1.co.jphttp:/www.docomo1.co.jp FREE ht
16、tp:/www.docomo2.co.jp FREE http:/www.foma1.co.jp FREE http:/www.yahoo.co.jphttp:/www.docomo1.co.jphttp:/www.google.co.jphttp:/www.google.co.jpProvision of 2G key services16Wireless Technology Innovation LabsWTI Background Lucent NetworkCare Professional Services (Lucent NPS) is a provider of communications consulting, intelligent maintenance, and ma
