Motorola V323I - Cell Phone - CDMA2000 1X Manuel d'utilisateur

1TelcomTelcom2720 Cellular and Wireless 2720 Cellular and Wireless NetworksNetworksDavid TipperAssociate ProfessorAssociate ProfessorTelecommunicati

10Telcom 2720 19Cellular Network ArchitecturePublic Switched Telephone NetworkBSCBSCMSC MSCGMSCHLRWired or Backhaul networkWireless (radio)partVLRVLRA

11Telcom 2720 21Cell Phone MarketCell Phone Market• Stratification of market• Teenage• Safety/children• Business – low end• Business – high end• Fam

12Telcom 2720 23Handset Market• Top Ten Phones in US during 1/01-10/30/07– Motorola RAZR V3 – Motorola RAZR V3m – LG VX8300 – Apple iPhone– LG Chocola

13Telcom 2720 25Base StationsBase Stations• Base Transceiver Station (BTS) - houses radio units Telcom 2720 26Base Station ControllerBase Station Cont

14Telcom 2720 27Mobile Switching CenterMobile Switching Center• Mobile Switching Center (MSC) (MTSO) – Provides switching functions , coordinates loca

15Telcom 2720 29WWANs• Over 3500 Satellites in use today - industry overall revenues of $2.3 billion in 2004• Telecommunications– global telephone con

16Telcom 2720 31Satellite Basics• Components• Earth (ground) Stations – antenna systems on or near earth• Uplink – transmission from an earth station

17Telcom 2720 33Satellite Classification• Can Characterize Satellites on variety of Factors• Frequency: – Spectrum •Orbit:– Height: (GEO, HEO, MEO,

18Telcom 2720 35Wireless MANs• Wireless Metropolitan Area Networks (WMANs) : provide wireless connectivity across a geographical area the size of a ci

19Telcom 2720 37IEEE 802.16 /WiMAX Standard• Characteristics of 802.16– Point to Multipoint (PMP) and Mesh protocol– NLOS wireless broadband services

2Telcom 2720 3Text and Grading• Text: Mobile Communications 2ndedition, Jochen Schiller, Addison Wesley• Principles of Wireless Networks A Unified Ap

20Telcom 2720 39WiMax Applications• According to WiMax Forum it supports 5 classes of applications:1. Multi-player Interactive Gaming.2. VOIP and Vide

21Telcom 2720 41Wireless Fidelity standards for InteroperabilityComponents: access points, antennas, mobile stations- 300 manufacturers- www.wirelesse

22Telcom 2720 43WLAN Topologiesad-hoc based architectureBSS 1BSS 2BSS 3AP 1AP 2AP 3WT 1WT 2WT 3WT 4WT 5ESSWired-distribution networkBasic Service Area

23Telcom 2720 45Applications of WPANs(a)(a)(b)(b)(c)(c)PSTN or the InternetPSTN or the InternetCable ReplacementAd hoc connectivityAccess to wired net

24Telcom 2720 47Evolving ApplicationsEvolving Applications••Focus on data based services and value added Focus on data based services and value added

25Telcom 2720 49Sample Multimodal Applications• Travel information– Make request via voice– Receive response in text•Directions– Make request via voic

26Telcom 2720 51Asset Location• Deploy WLAN in hospital• Equipment given LAN ID tags• Query to find.Telcom 2720 52Enablers• Wireless network developme

27Telcom 2720 53Safety of Mobile Communication SystemsTelcom 2720 54••Concern about safety of mobile devices: Concern about safety of mobile devices:

28Telcom 2720 55••Gas Station ExplosionsGas Station Explosions– No evidence other than distraction factor••Air Plane CrashesAir Plane Crashes– Some in

29Telcom 2720 57••General Facts:General Facts:– Mobile communication devices - low levels of radio frequency (RF) energy (max 5 W)– RF band produces n

3Telcom 2720 5Course Outline• 2.5G Cellular: Wireless Data Services – GPRS, Edge– cdma2000 1x-rtt• 3G Cellular:– Structure, protocols and advance

30Telcom 2720 59Typical RF Radiation Patternenergy distribution in a human head from a cellular handset radiating 600 mW at 835 MHz.•SAR data posted

31Telcom 2720 61• Studies thus far show little health risk– Long term effects unknown– Non-toxicological effects need study• Developmental effects unk

4Telcom 2720 7Wireless IssuesWireless Issues••Wireless link implicationsWireless link implications– communications channel is the air• poor quality:

5Telcom 2720 9Device Issues• Mobile Device Issues– Portability • Device and accessories size and weight – Usability• User characteristics (size, dexte

6Telcom 2720 11Wireless NetworksWireless Networks– Wireless Wide Area Networks (WWANs)• Cellular Networks :– GSM, cdmaone (IS-95), UMTS, cdma2000 EVDO

7Telcom 2720 13Frequencies for Communication• Frequency and wavelength: λ = c/f• Wavelength λ, speed of light c ≅ 3x108m/s, frequency f in Hz• VLF = V

8Telcom 2720 15Licensed Vs. UnlicensedMore worldwide optionsHigher barriers for entranceCoverage and quality inconsistentBetter coverage and qualityFa

9Telcom 2720 17••Mobile phone systemsMobile phone systems– Support communication to mobile users via wireless radio channel– Fastest growing technic