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WiMAX/LTE : 4G Wireless Broadband Networks

WiMAX/LTE : 4G Wireless Broadband Networks. 中山大學 電機系 許蒼嶺教授. 行動通信標準演進. 1x EVDO. HRPDA. CDMA 2000-1X. 1x EVDV Rel. C. 1x EVDV Rel. D. Evolution of Wireless Access Technologies. 4G Air Interfaces. Wide Area. Mobile. 3GPP2. MOBILE BROADBAND. LTE. UMTS. GPRS. EDGE. GSM.

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WiMAX/LTE : 4G Wireless Broadband Networks

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  1. WiMAX/LTE : 4G Wireless Broadband Networks 中山大學 電機系 許蒼嶺教授

  2. 行動通信標準演進

  3. 1x EVDO HRPDA CDMA 2000-1X 1x EVDV Rel. C 1x EVDV Rel. D Evolution of Wireless Access Technologies 4G Air Interfaces Wide Area Mobile 3GPP2 MOBILE BROADBAND LTE UMTS GPRS EDGE GSM HSPA 3GPP 802.16e (Mobile WIMAX) Mobile Industry Coverage/Mobility Nomadic Metro Area 802.16a/d (Fixed NLOS) Fixed Wireless Industry 802.11n (smart antennas) 802.11 Mesh extns. 802.16 (Fixed LOS) DSL Experience Dial Up Local Area Fixed 802.11b/a/g Data Rates (kbps) 100,000 + Higher Data Rate / Lower Cost per Bit

  4. WiMAX vs 3GPP 發展時程

  5. 3GPP Radio Access Milestones

  6. Application services IMS Layer Mobility, Policy and Administration Services Core network EPC Access technologies connection gateways Access Technologies Devices Operator’s Service Stack LTE WiFi WiMAX DSLAM

  7. WiMAX Market Position xDSL / FTTx xDSL / FTTx Mobile (GSM / GPRS / 3G /HSPA /LTE) Mobile (GSM / GPRS / 3G /HSPA /LTE)

  8. 現有無線接取技術比較 Technical Winner = Market Winner ?

  9. WiMAX 市場現況

  10. Population penetration of mobile, fixed and broadband across Asia-Pacific Source : Ovum 2008/12

  11. WiMAX Markets in Developed Country • Niche Market • Rural : Low ARPU • Bundle Service • Triple play • Killer Application ? • Fix and Nomadic broadband access • Broadband Penetration > 50% • Broadband Infrastructure is Developed • vs. xDSL / FTTx • No Significant Technical advantage except Nomadic • Incumbent Operator cost advantage • High Initial CAPX needed • Mobile (Voice & Data) • Mobile Voice Penetration : Saturation • Mobile Data Penetration : 20% ~80 % • vs. 3G / HSPA • Narrow advantage in Bandwidth • Great Disadvantage in Eco-System • No Significant advantage in Cost & Price • High Initial CAPX needed WiMAX is Still Looking for Business Model

  12. WiMAX Markets in Emerging Country • Fix and Nomadic broadband access • Broadband Penetration < 5% • Broadband Infrastructure is Low • vs. xDSL / FTTx • Significant CAPX advantage • Significant Deploying time advantage • Demand Growing • Mobile (Voice & Data) • Mobile Voice Penetration : Growing rapidly (prepaid dominated) • Mobile Data Penetration : < 5% • vs. 3G / HSPA • Narrow advantage in Bandwidth • Great Disadvantage in Eco-System • No Significant advantage in Cost & Price WiMAX Opportunity ?

  13. Markets in Emerging Country 越南，胡志明市 具備WiMAX市場機會但卻選擇3GPP 陣營

  14. 台灣 WiMAX 產業鏈

  15. Source : 工研院 IEK 2010/3

  16. TOP5 WiMAX Vendors Strategy Source: Ovum 2009/9

  17. An Industry War IT

  18. 3GPP 是市場主流

  19. IEEE std 802.16

  20. Standard Roadmap • IEEE 802.16 - 2001 • IEEE 802.16a/b/c - 2003 • Amendments to 802.16-2001 • IEEE 802.16 - 2004 • Compatibility issue with HIPERMAN of ETSI • 802.16d project • Replace previous standards • Fixed site access • IEEE 802.16e, 16f - 2005 (amendment) • Extend to mobility • MIB • IEEE 802.16g-2007(amendment) • Management Plane Procedures and Services • IEEE 802.16j – 2008

  21. Features • Broad Bandwidth • Up to 134.4Mbit/s • Transit over 50KM • Typical Architecture • 1 BS + n SSs • PMP or MESH • Spectrums • From 2 to 66 GHz • NLOS and LOS • Duplexing Techniques • TDD or FDD • WiMAX Forum • Conformance and Interoperability

  22. Scope of Standard CS SAP Service-Specific Convergence Sublayer ( MAC CS ) MAC SAP MAC Common Part Sublayer ( MAC CPS ) Security Sublayer ( MAC SS ) Scheduliing Services QoS Parameters Bandwidth Allocation PHY SAP Physical Layer (PHY) PHY

  23. TDMA/OFDM/OFDMA

  24. IEEE 802.16j-2008 • One MR-BS (Multi-hop Relay - Base Station) and many RS (Relay Station) • Transparent mode • Only data are relayed via RS • Remove obstruction • Non-Transparent mode • Expand service coverage • Both signaling and data are relayed via RS • Increase utilization/throughput

  25. IEEE 802.16j WiMAX

  26. IEEE 802.16j Configuration

  27. Transparent RS

  28. Non-Transparent RS

  29. OFDMA Symbol and Transparent RS Frame

  30. OFDMA Symbol and Non-Transparent RS Frame

  31. IEEE 802.16j Multi-hopTopology

  32. IEEE 802.16j Independent Scheduling Zones

  33. Bandwidth Request: Store-and-Forward Mode

  34. Bandwidth Request: End-to-End Mode

  35. Centralized vs Distributed Scheduling • Centralized Scheduling • For small size of networks • Only BS to do bandwidth allocations • Distributed Scheduling • For networks with hops greater than 2 • Both RS and BS do bandwidth allocations

  36. Centralized Scheduling

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