1 / 34

3G Tutorial

3G Tutorial. Brough Turner & Marc Orange. Originally presented at Fall VON 2002. Preface. The authors would like to acknowledgement material contributions from: Murtaza Amiji, NMS Communications Samuel S. May, Senior Research Analyst, US Bancorp Piper Jaffray

jasper
Télécharger la présentation

3G Tutorial

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 3G Tutorial Brough Turner & Marc Orange Originally presented at Fall VON 2002

  2. Preface... • The authors would like to acknowledgement material contributions from: • Murtaza Amiji, NMS Communications • Samuel S. May, Senior Research Analyst, US Bancorp Piper Jaffray • Others as noted on specific slides • We intend ongoing improvements to this tutorial and solicit your comments at: • rbt@nmss.com • and/or marc_orange@nmss.com • For the latest version go to: • http://www.nmscommunications.com/3Gtutorial

  3. FDMA — Frequency Division Multiple Access 30 KHz 30 KHz 30 KHz 30 KHz 30 KHz 30 KHz 30 KHz 30 KHz Frequency 1G — Separate Frequencies

  4. One timeslot = 0.577 ms One TDMA frame = 8 timeslots 200 KHz 200 KHz 200 KHz 200 KHz Time Frequency 2G — TDMATime Division Multiple Access

  5. 2G & 3G — CDMACode Division Multiple Access • Spread spectrum modulation • Originally developed for the military • Resists jamming and many kinds of interference • Coded modulation hidden from those w/o the code • All users share same (large) block of spectrum • One for one frequency reuse • Soft handoffs possible • Almost all accepted 3G radio standards are based on CDMA • CDMA2000, W-CDMA and TD-SCDMA

  6. Multi-Access Radio Techniques Courtesy of Petri Possi, UMTS World

  7. Courtesy of Suresh Goyal & Rich Howard

  8. Courtesy of Suresh Goyal & Rich Howard

  9. Courtesy of Suresh Goyal & Rich Howard

  10. Courtesy of Suresh Goyal & Rich Howard

  11. 3GPP2 Defines IS-41 Evolution • 3rd Generation Partnership Project “Two” • Separate organization, as 3GPP closely tied to GSM and UMTS • Goal of ultimate merger (3GPP + 3GPP2) remains • Evolution of IS-41 to “all IP” more direct but not any faster • Skips ATM stage • 1xRTT — IP packet support (like GPRS) • 1xEVDV — adds softswitch/ voice gateways • 3x — triples radio data rates

  12. BTS — Base Transceiver Station BSC — Base Station Controller MS — Mobile Station MSC — Mobile Switching Center HLR — Home Location Registry SMS-SC — Short Message Service — Serving Center STM — Synchronous Transfer Mode IS-95 BTS A Ref (A1, A2, A5) STM over T1/T3 MS BSC Proprietary Interface STM over T1/T3 or AAL1 over SONET Ater Ref (A3, A7) BTS IS-95 A Ref (A1, A2, A5) STM over T1/T3 BTS MS BSC Proprietary Interface A1 — Signaling interface for call control and mobility Management between MSC and BSC A5 — Full duplex bearer interface byte stream (SMS ?) A7 — Bearer interface for inter-BSC mobile handoff A2 — 64 kbps bearer interface for PCM voice A3 — Signaling interface for inter-BSC mobile handoff 2G cdmaOne (IS-95 + IS-41)

  13. BTS — Base Transceiver Station BSC — Base Station Controller MS — Mobile Station MSC — Mobile Switching Center HLR — Home Location Registry SMS-SC — Short Message Service — Serving Center STM — Synchronous Transfer Mode IS-2000 STM over T1/T3 or AAL1 over SONET BTS A Ref (A1, A2, A5) STM over T1/T3 MS BSC Proprietary Interface AQuarter Ref (A10, A11) IP over Ethernet/AAL5 BTS RADIUS over UDP/IP PDSN — Packet Data Serving Node AAA — Authentication, Authorization, and Accounting A10 — Bearer interface between BSC (PCF) and PDSN for packet data Home Agent — Mobile IP Home Agent A11 — Signaling interface between BSC (PCF) and PDSN for packet data CDMA2000 1x Network

  14. Packet Data Serving Node (PDSN) • Establish, maintain, and terminate PPP sessions with mobile station • Support simple and mobile IP services • Act as mobile IP Foreign Agent for visiting mobile station • Handle authentication, authorization, and accounting (AAA) for mobile station • Uses RADIUS protocol • Route packets between mobile stations and external packet data networks • Collect usage data and forward to AAA server

  15. IS-2000 IS-2000 RADIUS over UDP/IP 1xEVDO — IP Data Only

  16. SIP SCTP/IP SS7 IS-2000 H.248 (Maybe MGCP) SIP Circuit switched voice SIP Proxy — Session Initiation Protocol Proxy Server MGCF — Media Gateway Control Function SGW — Signaling Gateway (SS7) MGW — Media Gateway (Voice) IS-2000 Nextgen MSC ? 1XEVDV — IP Data and Voice Packet switched voice

  17. 3G Tutorial • History and Evolution of Mobile Radio • Evolving Network Architectures • Evolving Services • Applications • Business Models

  18. Up and Coming Mobile Services • SMS, EMS, MMS • Location-based services • 3G-324M Video • VoIP w/o QoS; Push-to-Talk • IP Multimedia Services (w/ QoS) • Converged “All IP” networks — the Vision

  19. PC B C Short Message Service (SMS) • Point-to-point, short, text message service • Messages over signaling channel (MAP or IS-41) • SMSC stores-and-forwards SMSs; delivery reports • SME is any data terminal or Mobile Station SMS-GMSC E PSDN A SC BTS BSC SMS-IWMSC MSSME MSC VLR SMS — GMSC Gateway MSC SMS — IWMSC InterWorking MSC SC — Service Center SME — Short Messaging Entity SMEs HLR

  20. SMS Principles • Basic services • SM MT (Mobile Terminated) • SM MO (Mobile Originated) • (3GPP2) SM MO can be cancelled • (3GPP2) User can acknowledge • SM Service Center (3GPP) akaMessage Center (3GPP2) • Relays and store-and-forwards SMSs • Payload of up to 140 bytes, but • Can be compressed (MS-to-MS) • And/or segmented in several SMs

  21. Delivery (MT) Report Submission (MO) MS SC Report SMS Transport • Delivery / Submission report • Optional in 3GPP2 • Messages-Waiting • SC informs HLR/VLR that a message could not be delivered to MS • Alert-SC • HLR informs SC that the MS is again ready to receive • All messages over signaling channels • Usually SS7; SMSC may have IP option

  22. Location • Driven by e911 requirements in US • FCC mandated; not yet functioning as desired • Most operators are operating under “waivers” • Potential revenue from location-based services • Several technical approaches • In network technologies (measurements at cell sites) • Handset technologies • Network-assisted handset approaches • Plus additional core network infrastructure • Location computation and mobile location servers • Significant privacy issues

  23. Location Technology • Cell identity: crude but available today • Based on timing • TA: Timing Advance (distance from GSM BTS) • Based on timing and triangulation • TOA: Time of Arrival • TDOA: Time Difference of Arrival • EOTD: Enhanced Observed Time Difference • AOA: Angle of Arrival • Based on satellite navigation systems • GPS: Global Positioning System • A-GPS: Assisted GPS

  24. Location-Based Services • Emergency services • E911 - Enhanced 911 • Value-added personal services • friend finder, directions • Commercial services • coupons or offers from nearby stores • Network internal • Traffic & coverage measurements • Lawful intercept extensions • law enforcement locates suspect

  25. Location Information • Location (in 3D), speed and direction • with timestamp • Accuracy of measurement • Response time • a QoS measure • Security & Privacy • authorized clients • secure info exchange • privacy control by user and/or operator

  26. PublicService Answering Point Accesstandem ESRK& voice ESRK& voice PDE PDE BSC MSC ESRK Callback #,Long., Lat. ESRK ALI DB Callback #,Long., Lat. PDE PDE MPC SN SN SN US E911 Phase II Architecture PDE — Position Determining Entity MPC — Mobile Positioning Center ESRK — Emergency Service Routing Key ALI DB — Automatic Location Identification Data Base

  27. 3G QoS • Substantial new requirements on the radio access network • Traffic classes • Conversational, streaming, interactive, background • Ability to specify • Traffic handling priority • Allocation/retention priority • Error rates (bits and/ or SDUs) • Transfer delay • Data rates (maximum and guaranteed) • Deliver in order (Y/N)

  28. Additional Reference Material

  29. Mobile Standard Organizations

  30. Partnership Project and Forums • ITU IMT-2000 http://www.itu.int/imt2000 • Mobile Partnership Projects • 3GPP: http://www.3gpp.org • 3GPP2: http://www.3gpp2.org • Mobile Technical Forums • 3G All IP Forum: http://www.3gip.org • IPv6 Forum: http://www.ipv6forum.com • Mobile Marketing Forums • Mobile Wireless Internet Forum: http://www.mwif.org • UMTS Forum: http://www.umts-forum.org • GSM Forum: http://www.gsmworld.org • Universal Wireless Communication: http://www.uwcc.org • Global Mobile Supplier: http://www.gsacom.com

  31. Mobile Standards Organizations • European Technical Standard Institute (Europe): • http://www.etsi.org • Telecommunication Industry Association (USA): • http://www.tiaonline.org • Standard Committee T1 (USA): • http://www.t1.org • China Wireless Telecommunication Standard (China): • http://www.cwts.org • The Association of Radio Industries and Businesses (Japan): • http://www.arib.or.jp/arib/english/ • The Telecommunication Technology Committee (Japan): • http://www.ttc.or.jp/e/index.html • The Telecommunication Technology Association (Korea): • http://www.tta.or.kr/english/e_index.htm

  32. Location-Related Organizations • LIF, Location Interoperability Forum • http://www.locationforum.org/ • Responsible for Mobile Location Protocol (MLP) • Now part of Open Mobile Alliance (OMA) • OMA, Open Mobile Alliance • http://www.openmobilealliance.org/ • Consolidates Open Mobile Architecture, WAP Forum, LIF, SyncML, MMS Interoperability Group, Wireless Village • Open GIS Consortium • http://www.opengis.org/ • Focus on standards for spatial and location information • WLIA, Wireless Location Industry Association • http://www.wliaonline.com

  33. NMS COMMUNICATIONS brough_turner@nmss.commarc_orange@nmss.com www.nmss.com

More Related