LTE TDD – The Global Solution for Unpaired Spectrum


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LTE TDD is a mode of the common LTE standard, that is specified for the unpaired spectrum. Being a common standard, LTE TDD has the same features and evolution as LTE FDD. This commonality enables vendors to develop common TDD/FDD products and leverage from the single, vast and expanding LTE ecosystem. Initially, the choice between FDD and TDD is driven purely by spectrum availability, but it is reasonable to expect that most operators will deploy both networks to take advantage of all available spectrum resources.

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LTE TDD – The Global Solution for Unpaired Spectrum

  1. 1. 1 LTE TDD—the global solution for unpaired spectrum August 2013
  2. 2. 2 LTE TDD: the global solution for unpaired spectrum LTE TDD LTE is a common global standard for paired and unpaired spectrum1 Inherent tight TDD/FDD interworking and seamless 3G interworking 2 Key to access higher spectrum bands on the path to 1000x 3 Common FDD/TDD technology ecosystem, common products 4
  3. 3. 3 The same 3GPP specifications for LTE FDD and LTE TDD • Same features in same standards release LTE is a common standard for paired and unpaired spectrum OFDMA Based FDD and TDD supportHigh data rates Low Latency Flexible spectrum support Inherent FDD/TDD Interworking Seamless 3G interworking
  4. 4. 4 Global LTE TDD spectrum opportunities 1IMT extension band provides 50 MHz TDD in addition to 70 MHz + 70 MHz FDD in most countries.. LTE TDD2600 (B41) North America LTE TDD2600 (B38) South America LTE-TDD2600 (B38) LTE-TDD2300 (B40) LTE-TDD3.5/3.6 (B42/43) Europe LTE TDD2600 (B38) LTE TDD3.5 (B42) Russia LTE TDD1900 (B39) LTE TDD2300 (B40) LTE TDD2600 (B38/B41) China LTE TDD2300 (B40) India LTE-TDD2600 (~B41) ‘XGP’ Japan LTE TDD 2300(B40) Australia LTE TDD2600 (B38) LTE TDD2300 (B40) LTE TDD3.5 (B42) MENA Global unpaired spectrum 1.9 GHz (B39) 1880 MHz to 1920 MHz 2.3 GHz (B40) 2300 MHz to 2400 MHz 2.6 GHz (B38)1 2570 MHz to 2620 MHz 2.6 GHz (B41 ) 2496 MHz to 2690 MHz ~3.6 GHz (B42/43) 3.4 to 3.6 and 3.6 to 3.8 Potential Spectrum 40MHz 100 MHz 50 MHz 194 MHz 400 MHz
  5. 5. 5 LTE TDD is truly global—many combining FDD and TDD 54TDD Networks commitments LTE TDD investments worldwide Commercial network deployments, trial, studies 39Countries committed 18TDD Network Launches 9Combined TDD and FDD Data Source: GSA’s Evolution to LTE report. May 21 2013 for commitments and July 16 2013 for launches.
  6. 6. 6 There is a TDD/FDD tradeoff—eventually most will deploy both 1 Assuming same transmit power . The main reason for reduced coverage is that the uplink device power is used part of the time for TDD but continuously for FDD . As an example, an 1:1 UL/DL allocation means a duty cycle of ~50% in the uplink which contributes to a ~3dB reduced link budget TDD Coverage TDD can assign more downlink capacity Flexibility to assign more resources to meet asymmetric data usage 2:1 FDDCoverage Uplink Downlink Time DL UL DL UL Flexible Downlink/Uplink ratio Fixed Downlink/ Uplink on different frequencies FDD can cover larger area1 Only applicable to coverage driven deployments
  7. 7. 7 Common LTE FDD and LTE TDD technology ecosystem, common products
  8. 8. 8 LTE has a vibrant ecosystem with two flavors: FDD and TDD Global LTE network launches LTE TDD momentum Large and growing device ecosystem Source: July 17 2013 for networks and July 5, 2013 for devices Global LTE/3G multimode connections reached 100 Million in May 2013 – Wireless Intelligence 194Launches 443Operators investing in LTE 19TDD Launches 200TDD Devices Announced 948Devices 100Vendors
  9. 9. 9 Common LTE standard enables common FDD/TDD products Common LTE Core Network (EPC) Common Standard Common FDD/TDD radio network products TDD shares most of FDD design and standard Inherent seamless FDD/TDD interoperability Even tighter FDD/TDD interworking planned1 Common FDD/TDD devices (with 2G/3G multimode and seamless 2G/3G interoperability) Combined LTE FDD/TDD LTE FDD LTE TDD 1Such as aggregation of FDD and TDD withing the same node and different nodes (multiflow)
  10. 10. 10 Qualcomm : Technology leader in LTE FDD/TDD chipsets Common LTE FDD/TDD platform and FDD/TDD interworking from first gen. LTE modem MDM 9x25 8974 8926 MDM 9600 MDM 9200 First Generation 2010 World’s First Integrated LTE/3G Modem Chips MDM 9x15 8960 8930 Second Generation 2011 – 2012 World’s First Mobile Platforms with Integrated LTE World Mode Third Generation 2013 First LTE Advanced World Mode Modem with Cat4 and Carrier Aggregation Snapdragon 800 with carrier aggregation launched June 2013 Note: Snapdragon integrates the Gobi modems, but Gobi modems are also offered as a standalone modem product Qualcomm Snapdragon and Qualcomm Gobi are products of Qualcomm Technologies, Inc.
  11. 11. 11 Qualcomm : extending mobile computing leadership to LTE TDD Tablets High-end smartphones High-volume smartphones #1in App Processors The vast majority are multimode LTE FDD/TDD, WCDMA/HSPA+, 1X, EV-DO, TD-SCDMA GSM/EDGE #1in GPU & DSP #1in 3G/LTE Modems 30 design wins at China Mobile LTE TDD trial1#1 Sources: Mobile AP Unit Shipment - Strategy Analytics; GPU Shipment - Jon Peddi Research; DSP shipment - Forward Concepts; 3G/4G/LTE - Strategy Analytics; RF iSuppli, Q1’12; 1As reported at earnings July 25th Components of the type(s) mentioned in this slide are products of Qualcomm Technologies, Inc. and/or its subsidiaries.
  12. 12. 12 Inherent tight TDD/FDD interworking and seamless 3G interworking
  13. 13. 13 Seamless 3G interworking is the foundation to successful LTE Enables ubiquitous data coverage and user experience Enables global roaming in global FDD bands Enables ubiquitous voice services— even with VoLTE1 3G (and 2G) Enables ubiquitous data coverage, voice services, and global roaming LTE (FDD and/or TDD) Common TDD/FDD platform LTE/3G/2G Multimode 1Fallback to 3G/2G (CSFB) since 2012; VoLTE with SRVCC ensures seamless voice, CSFB still needed for roaming Qualcomm Gobi is a product of Qualcomm Technologies, Inc.
  14. 14. 14 Inherent LTE FDD/TDD interworking and seamless voice Initial launches LTE data devices Initial voice solution LTE data handsets Long-term voice solution LTE VoIP handsets 2G/3G coverage continuity and roaming LTE for data only LTE for data 2G/3G for voice Simultaneous LTE VoIP and rich data services LTE TDD/FDD with 2G/3G multimode launched globally1 Inherent seamless TDD/FDD interworking for data Circuit switched fallback (CSFB) to 2G/3G voice launched globally (FDD and TDD) Inherent seamless TDD/FDD interworking Coming: VoLTE with single radio voice call continuity (SRVCC) + CSFB to 2G/3G voice for roaming Inherent seamless TDD/FDD interworking for VoLTE 1Including seamless data LTE and 3G interworking with mobility through redirection, and packet switched handover.
  15. 15. 15 Even tighter FDD and TDD interworking June 2013: FDD Carrier Aggregation Coming: TDD Carrier Aggregation FDD or TDD FDD or TDD FDD TDD Available: Seamless interworking1 Future: Aggregate FDD + TDD, even across nodes (multiflow)2 FDD TDD 1Data seamless data interworking with mobility. First step in voice interworking is fallback to 2G/3G (CSFB) which is available, then single radio VolTE with SRVCC for seamless fallback to 2G/3G. 23GPP R12 candidates
  16. 16. 16 Key to access higher spectrum bands on the path to 1000x
  17. 17. 17 Multiple enhancements required to reach 1000x 1000x Note: neighborhood small cells and ASA are not covered in this presentation, see and www.qual; for more details. Hetnets with interference management (eICIC/IC) New deployment models, e.g. neighborhood small cells Continue to evolve LTE: Multiflow, Hetnets enhancements Opportunistic HetNets LTE Direct for proximity services LTE Broadcast Carrier Aggregation (TDD and FDD) Authorized Shared Access (ASA) Higher spectrum bands (esp. TDD)
  18. 18. 18 Many higher spectrum bands suited to LTE TDD and small cells 1 Some parts can be traditionally licensed, some parts need to be ASA licensed, such as ~3.5GHz in the US/EU1. 3GPP has already defined 3G/4G bands 42/43 for 3.4 GHz to 3.8 GHz, 3.5GHz in the US defined as 3550 – 3650 MHz. In addition, Wi-Fi in unlicensed such as 2.4GHz, 5GHz (802.11 ac) and 60GHz (802.11 ad). ~450 MHz ~3GHz Wide area spectrum 3.4 to 3.8 GHz Emerging as a new small cell band1 Macro + Small Cell FDD or TDD e.g. 700MHz FDD, 2.3GHz TDD Small Cell TDD e.g. 3.5GHz IndoorHotspot
  19. 19. 19 3G/4G Macro base station Authorized shared access (ASA) is optimal for small cells Exclusive use Incumbent user Optimal for small cells 3G/4G macro base station Regular multi-band device1 ASA required when spectrum cannot be cleared within reasonable timeframe, or at all locations 3G/4G small cells At given locations, times ensures predictability for long-term investments Small cells can be closer to incumbent than macros Protects incumbents Binary use—either incumbent or rights holder Protection zones Satellite Public safety ….Military radar 1 No device impact due to ASA, just a regular 3G/4G device supporting global harmonized bands targeted for ASA. Carrier aggregation would be beneficial to aggregate new ASA spectrum with existing spectrum, but is not required.
  20. 20. 20 ASA CANDIDATE EXAMPLES Applicable Regions EUROPE (Traditionally licensed in e.g. India) MENA (Traditionally licensed in e.g. Europe) USA, EU, LATAM, SEAP Incumbent Users Telemetry, public safety, cameras Various Naval Radar (US) Satellite (EU, LATAM. SEAP) Suitable Technology LTE TDD LTE FDD/TDD LTE TDD Possible Launch ~2015 ASA targets harmonized spectrum—many suited to LTE TDD 2.6 GHz (100+ MHz) 2.3 GHz (100 MHz) ~3.5 GHz (100-200 MHz) Emerging as a key band for 3G/4G small cells, some parts can be traditionally licensed, but some parts need to be ASA licensed, such as ~3.5GHz in the US/EU1 3.4 to 3.8 GHz 1 3GPP has already defined bands 42/43 for 3.4 GHz to 3.8 GHz, 3.5GHz in the US defined as 3550 – 3650 MHz, but up to 200MHz could be targeted for ASA in e.g. SEAP/LATAM. Note that ASA targets IMT spectrum bands, but the concept can be applied generally to all spectrum bands and other technologies
  21. 21. 21 LTE TDD: the global solution for unpaired spectrum LTE TDD LTE is a common global standard for paired and unpaired spectrum1 Inherent tight TDD/FDD interworking and seamless 3G interworking 2 Key to access higher spectrum bands on the path to 1000x 3 Common FDD/TDD technology ecosystem, common products 4
  22. 22. 22 @Qualcomm_tech Questions? - Connect with Us BLOG
  23. 23. 23 For more information on Qualcomm, visit us at: & ©2013 QUALCOMM Incorporated and/or its subsidiaries. All Rights Reserved. References in this presentation to “Qualcomm” may mean Qualcomm Incorporated, Qualcomm Technologies, Inc., and/or other subsidiaries or business units within the Qualcomm corporate structure, as applicable. Qualcomm Incorporated includes Qualcomm’s licensing business, QTL, and the vast majority of its patent portfolio. Qualcomm Technologies, Inc., a wholly-owned subsidiary of Qualcomm Incorporated, operates, along with its subsidiaries, substantially all of Qualcomm’s engineering, research and development functions, and substantially all of its product and services businesses, including its semiconductor business, QMC. Thank you Follow us on:
  24. 24. 24 A strong LTE evolution path Note: Estimated commercial dates. LTE LTE Advanced DL: 73 – 150 Mbps1 UL: 36 – 75 Mbps1 (10 MHz – 20 MHz) DL: 3 Gbps2 UL: 1.5 Gbps2 ( Up to 100 MHz) Commercial 20142013 2015 2016+ Rel-12 & BeyondRel-10Rel-9Rel-8 Rel-11 FDD and TDD support Carrier Aggregation, relays, HetNets (eICIC/IC), Adv MIMO LTE Direct, Hetnets enhancements, Multiflow, WiFi interworking, Realizes full benefits of HetNets (FeICIC/IC) Enhanced voice fallback (CSFB), VoLTE, LTE Broadcast (eMBMS) 1Peak rates for 10 MHz or 20 MHz FDD using 2x2 MIMO, standard supports 4x4 MIMO enabling peak rates of 300 Mbps. 2Peak data rate can exceed 1 Gbps using 4x4 MIMO and at least 80 MHz of spectrum (carrier aggregation), or 3GBps with 8x8 MIMO and 100MHz of spectrum. Similarly, the uplink can reach 1.5Gbps with 4x4 MIMO. Created 7/18/2013