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3 rd Generation Wireless Network

3 rd Generation Wireless Network. Presentation By: Dipesh G Kamdar Exam No: 5008 M.E.E.C. – (C.S.E) Sem-I LD College of Engineering. Outline. Introduction to WCDMA Why WCDMA ? Evolution from 2G to 3G WCDMA / UMTS Architecture Air Interface (WCDMA) Radio Access Network (UTRAN)

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3 rd Generation Wireless Network

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  1. 3rd Generation Wireless Network Presentation By: Dipesh G Kamdar Exam No: 5008 M.E.E.C. – (C.S.E) Sem-I LD College of Engineering

  2. Outline • IntroductiontoWCDMA • Why WCDMA ? • Evolution from 2G to 3G • WCDMA / UMTS Architecture • Air Interface (WCDMA) • Radio Access Network (UTRAN) • Core Network • Radio Resources Management • Additional Briefs • WCDMA V/s CDMA 2000

  3. Introduction to WCDMA • Wideband Code Division Multiple Access (WCDMA) is a CDMA Channel that is four times wider than the current channel that are typically used in 2G Networks.

  4. Outline • Introduction to WCDMA • Why WCDMA ? • Evolution from 2G to 3G • WCDMA / UMTS Architecture • Air Interface (WCDMA) • Radio Access Network (UTRAN) • Core Network • Radio Resources Management • Additional Briefs • WCDMA V/s CDMA 2000

  5. Why WCDMA ? • The significant increase in subscribers and traffic requires large BW. The answer to the capacity and BW demand is the provision of new spectrum and the development of a new technology – Wideband CDMA (WCDMA) • WCDMA was developed in order to create a global standard for real time multimedia services that ensured international roaming.

  6. Outline • Introduction to WCDMA • Why WCDMA ? • Evolution from 2G to 3G • WCDMA / UMTS Architecture • Air Interface (WCDMA) • Radio Access Network (UTRAN) • Core Network • Radio Resources Management • Additional Briefs • WCDMA V/s CDMA 2000

  7. Evolution 2G to 3G Revolution EDGE GSM GPRS WCDMA IMT2000 IS95A IS95B CDMA2000

  8. Evolution : From 2G to 3G

  9. Evolution : From 2G to 3G Primary Requirements of a 3G Network • Fully specified and world-widely valid,Major interfaces should be standardized and open. • Supports multimedia and all of its components. • Wideband radio access. • Services must be independent from radio access technology and is not limited by the network infrastructure.

  10. Standardization of WCDMA WCDMA Air Interface & Main Parameters

  11. Outline • Introduction to WCDMA • Why WCDMA ? • Evolution from 2G to 3G • WCDMA / UMTS Architecture • Air Interface (WCDMA) • Radio Access Network (UTRAN) • Core Network • Radio Resources Management • Additional Briefs • WCDMA V/s CDMA 2000

  12. WCDMA System Architecture Uu Iu Node B MSC/VLR GMSC RNC Node B USIM Cu Iur HLR Iub External Networks ME Node B RNC SGSN GGSN Node B UE UTRAN CN

  13. WCDMA Air Interface UE UTRAN CN Wideband CDMA, Overview • DS-CDMA, 5 MHz Carrier Spacing, • CDMA Gives Frequency Reuse Factor = 1 • 5 MHz Bandwidth allows Multipath Diversity using Rake Receiver • Variable Spreading Factor (VSF) to offer Bandwidth on Demand (BoD) up to 2MHz • Fast (1.5kHz) Power Control for Optimal Interference Reduction • Services multiplexing with different QoS • Real-time / Best-effort • 10% Frame Error Rate to 10-6 Bit Error Rate

  14. WCDMA Air Interface UE UTRAN CN Direct Sequence Spread Spectrum Spreading f f Code Gain User 1 Wideband Dispreading Spreading f f Received Narrowband f f User N Wideband • Frequency Reuse Factor = 1 Variable Spreading Factor (VSF) Spreading : 256 • VSF Allows Bandwidth on Demand. Lower Spreading Factor requires Higher SNR, causing Higher Interference in exchange. f f User 1 Wideband Spreading : 16 f f User 2 Wideband

  15. WCDMA Air Interface UE UTRAN CN Protocol Architecture

  16. UTRAN UE UTRAN CN Uu Iu Node B MSC/VLR GMSC RNC Node B USIM Cu Iur HLR Iub External Networks ME Node B RNC SGSN GGSN Node B UE UTRAN CN

  17. UTRAN UE UTRAN CN UMTS Terrestrial Radio Access Network, Overview • Two Distinct Elements :Base Stations (Node B)Radio Network Controllers (RNC) • 1 RNC and 1+ Node Bs are group together to form a Radio Network Sub-system (RNS) • Handles all Radio-Related Functionality • Soft Handover • Radio Resources Management Algorithms Node B RNC Node B RNS Iur Iub Node B RNC Node B RNS UTRAN

  18. UTRAN Radio Control Plane User Plane Network Layer Application Data Protocol Stream(s) Transport Transport Network Transport Network Transport Network Network User Plane User Plane Control Plane Layer ALCAP(s) Signaling Signaling Data Bearer(s) Bearer(s) Bearer(s) Physical Layer UE UTRAN CN Protocol Model for UTRAN Terrestrial Interfaces Derivatives : Iur1, Iur2, Iur3, Iur4 Iub Iu CS Iu PS Iu BC Functions of Node B (Base Station) • Air Interface L1 Processing (Channel Coding, Interleaving, Rate Adaptation, Spreading, etc.) • Basic RRM, e.g. Inner Loop Power Control

  19. UTRAN UE UTRAN CN Logical Roles of the RNC Controlling RNC (CRNC) Responsible for the load and congestion control of its own cells CRNC Node B RNC Node B Iu Node B Serving RNC (SRNC) Terminates : Iu link of user data, Radio Resource Control Signaling Performs : L2 processing of data to/from the radio interface, RRM operations (Handover, Outer Loop Power Control) SRNC Node B Iur UE Iu Node B DRNC Node B Iu Node B SRNC Node B Drift RNC (DRNC) Performs : Macro-diversity Combining and splitting Iur Iu Node B UE DRNC Node B

  20. Core Network UE UTRAN CN Uu Iu Node B MSC/VLR GMSC RNC Node B USIM Cu Iur HLR Iub External Networks ME Node B RNC SGSN GGSN Node B UE UTRAN CN

  21. Summary • System Architecture, Bearer Services, QoS Classes • WCDMA Air Interface : Spread Spectrum, Transport Channels • UTRAN : Roles of RNCs and Node Bs • Core Network : Responsible for switching system Uu Iu Node B MSC/VLR GMSC RNC Node B USIM Cu Iur HLR Iub External Networks ME Node B RNC SGSN GGSN Node B UE UTRAN CN

  22. Outline • Introduction to WCDMA • Why WCDMA ? • Evolution from 2G to 3G • WCDMA / UMTS Architecture • Air Interface (WCDMA) • Radio Access Network (UTRAN) • Core Network • Radio Resources Management • Additional Briefs • WCDMA V/s CDMA 2000

  23. Radio Resources Management • Network Based Functions • Admission Control (AC) • Load Control (LC) • Packet Scheduler (PS) • Connection Based Functions • Handover Control (HC) • Power Control (PC)

  24. Outline • Introduction to WCDMA • Why WCDMA ? • Evolution from 2G to 3G • WCDMA / UMTS Architecture • Air Interface (WCDMA) • Radio Access Network (UTRAN) • Core Network • Radio Resources Management • Additional Briefs • WCDMA V/s CDMA 2000

  25. WCDMA V/s cdma2000

  26. Conclusion • The concept of a WCDMA adds flexibility in the 3G deployments, enhances system performance, and protects network investments through reuse of resources. • A WCDMA supports the growth of today’s services as well as the creation and growth of mobile services beyond voice, data, video. • In Short, WCDMA is the technology design to provide service of voice, data and video with the same handset that customer is using even on international roaming…….

  27. Key References • Key References • WCDMA for UMTS • Radio Access for Third Generation Mobile Communications, 2nd Ed., • Edited by Harri Holma and Antti Toskala • Overview of UMTS • Telecommunication Software and Multimedia Laboratory, Helsinki University of Technology • Course S-72.238 : Wideband CDMA systems, • Communications Laboratory, Helsinki University of Technology • WCDMA – Requirements and Practical Design • Rudolf Tanner and Jason Woodard3 • GPP, Technical Specification Group • RAN, User Equipment (UE) Radio Transmission and Reception (FDD), 3GPP TS 25.101 version 6.11.0, March 2006, available at www.3gpp.org • GSM World • www.gsmworld.com

  28. Thank YouQuestions ???

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