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Extending the Benefits of LTE-Advanced to Unlicensed Spectrum
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Extending the Benefits of LTE-Advanced to Unlicensed Spectrum

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  • 1. November 2013 Extending the benefits of LTE Advanced to unlicensed spectrum 1
  • 2. Mobile data traffic growth— industry preparing for 1000x Industry preparing for 1000x data traffic growth* Richer content More devices more video everything connected Bestseller example: 5.93(High Definition) GB Movie ~ 2.49 GB Movie (Standard Definition) 0.0014 GB Homepage 1.8 GB Game for Android 0.14 GB Soundtrack ~ 7 Billion 25 Billion Interconnected device forecast in 20202 Cumulative smartphone forecast between 2013-20171 0.00091 GB Book *1000x would be e.g. reached if mobile data traffic doubled ten times, but Qualcomm does not make predictions when 1000x will happen, Qualcomm work on the solutions to enable 1000x 2
  • 3. Rising to meet the 1000x mobile data challenge More Small Cells 3
  • 4. Small cells in licensed spectrum is the foundation of 1000x User deployed 3G/4G Operator deployed 3G/4G Typically indoor small cells Indoor/outdoor small cells1 4G Relays & Wireless Backhaul ENTERPRISE RESIDENTIAL METRO Leveraging unlicensed spectrum opportunistically Unlicensed technologies integrated with 3G/4G small cells 1 Such as relay and Pico/Metro/RRH small cells for hotspots. RRH= Remote Radio Heads, in addition Distributed Antenna Systems are used in HetNets 4
  • 5. We need to make best use of all spectrum types for 1000x Licensed Spectrum Auctions of cleared spectrum for 3G/4G Shared Licensed Spectrum Unlicensed Spectrum Complementary licensing for 3G/4G: Authorized Shared Access (ASA) Multiple technologies (Wi-Fi, LTE in unlicensed, BT & others) Exclusive use Shared exclusive use Shared use Industry’s top priority, ensures quality of service (QoS), mobility and control ASA required when government spectrum cannot be cleared within a reasonable timeframe, or at all locations Unpredictable QoS, ideal for local area access, and opportunistic use for mobile broadband 5
  • 6. LTE provides a solid foundation for the evolution of mobile A vibrant, global ecosystem developed LTE and made it a success Common global standard Support for paired (FDD) and unpaired (TDD) spectrum Seamless interworking with 3G 6
  • 7. Extending the benefits of LTE Advanced to unlicensed spectrum Better performance Enhanced user experience Longer range and increased capacity Thanks to LTE Advanced anchor in licensed spectrum with robust mobility LTE in Licensed F1 spectrum 700MHz to 3.8GHz Ideal for small cells Carrier aggregation LTE in Unlicensed spectrum 5 GHz Unified LTE Network Coexists with Wi-Fi Common LTE network with common authentication, security and management. Features to protect Wi-Fi neighbors 7
  • 8. Unlicensed 5 GHz spectrum is ideal for small cells with LTE Complementing licensed spectrum—the foundation of mobile data and 1000x Unified LTE network ENTERPRISE RESIDENTIAL METRO for licensed and unlicensed Opportunistic use Untapped capacity for mobile While shared, unlicensed spectrum is “free”, it has unpredictable performance ~500 MHz unlicensed spectrum available around 5 GHz, more in pipeline Shorter range Wider bands suitable for sharing Higher 5 Ghz spectrum, lower transmit power regulations – ideal for small cells Efficiently shared amongst multiple users thanks to wide 5 GHz spectrum bands 8
  • 9. Building upon LTE Advanced enables a better user experience Operator managed, coordinated LTE Advanced with a unified network for all spectrum types Anyone can talk (or listen before talk features1) Wi-Fi (unlicensed) Coordinate before/while talking (Synchronous operation) Bringing LTE benefits to unlicensed spectrum Common LTE core network 1. Seamless mobility and robust control signaling 1Depending on region, listen before talk features generally required, except e.g. US, Korea and China 2. Integrated authentication, security and management 9
  • 10. Aggregate unlicensed spectrum with a solid anchor in licensed Unlicensed, e.g. 5 GHz Licensed, e.g. 2 GHz Licensed e.g. 2 GHz (Supplemental downlink example) (LTE Downlink, FDD example) (LTE Uplink, FDD example) F1 F2’ A better user experience with a solid anchor in licensed spectrum Control and data in LTE licensed spectrum, LTE in unlicensed for data only Supplemental downlink to boost downlink Carrier aggregation to boost both downlink and uplink Leverages LTE Advanced carrier aggregation F2 2 Aggregated Fatter data pipe Downlink Uplink Note: Leverages available LTE Advanced carrier aggregation, but the specific band for SDL need to be standardized. TDD or FDD aggregation is standardized and commercial (FDD June 2013), but FDD + TDD aggregation is a 3GPP R12 candidate 10
  • 11. Leverages existing LTE standards, ecosystem and scale LTE transmitted according to unlicensed spectrum regulations, such as power levels Large scale, global 1 LTE deployments 200+ network launches in 80+ countries1 in unlicensed spectrum 2 LTEUSA, Korea and China for LTE Advanced 3GPP R10 Targets 5 GHz unlicensed bands 3 LTE in unlicensed spectrum everywhere Regulatory ‘Listen Before Talk’ features require standards modifications Candidate technology for 3GPP R13 R10 Common core network with common mobility, security, authentication etc. 1Per GSA as of as of 3Q 2013 R13 Unified network for licensed and unlicensed spectrum 11
  • 12. Longer range and more capacity compared to carrier Wi-Fi Capacity gains depends on deployment scenario and technology version Wi-Fi Up to 10% Access point penetration Fewer nodes at same capacity 2% Wi-Fi Or more capacity LTE in unlicensed Inside-out, neighborhood small cell example Two operators; one using Wi-Fi, one switching from Wi-Fi to LTE in unlicensed. Hetnet in licensed spectrum augmented with unlicensed spectrum. 100% overall Wi-Fi penetration due to private Wi-Fi. >2x x Capacity Assumptions:, Dense urban simulation model with residential apartments and first floor commercial units. Penetration corresponds to the fraction of residences and commercial units with a small cell or AP from a given operator, but overall Wi-Fi penetration is 100% (e.g. due to private users). 2 operator networks simulated. One network (interfering) is always Wi-Fi . The other (target) is either Wi-Fi or LTE in unlicensed. There are 1200 visiting users per sqkm per operator which are used to model capacity gains. 50% indoor/50% outdoor. Total traffic capacity is the amount of total bursty traffic captured by the macro + indoor small cells or APs satisfying a QoS criteria. 12
  • 13. Coexists with Wi-Fi—features to protect Wi-Fi neighbors Can in many cases be a better neighbor to Wi-Fi than Wi-Fi itself >2x 1x Operator A: Wi-Fi Indoor and outdoor small cells 1.2x 1x Operator B: Wi-Fi Gain Operator B switches Wi-Fi to LTE in unlicensed Wi-Fi in unlicensed HetNet in licensed Assumptions: Two operators. 48 Pico+108 Femto cells per operator. 300 users per operator with 70% indoor. 3GPP Bursty model. 12x40MHz @ 5GHz for unlicensed spectrum. LTE 10 MHz channel at 2 GHz. 2x2 MIMO for Wi-Fi , LTE and LTE in unlicensed phase II with Rank 1 transmission. eICIC enabled. (Median Throughput) Operator A: Wi-Fi Operator B: LTE in unlicensed Everyone could be better off 13
  • 14. Coexists with Wi-Fi—features to protect Wi-Fi neighbors 5.33 GHz 5.15 GHz Unlicensed 5GHz band 20 MHz * * * 5.49 GHz * 20 * MHz 5.835 GHz * * * * * * * * * * * 20 MHz Up to 500 MHz available Dynamic channel selection based on interference Adjust transmit power to limit interference to other users Longer term with new standard for global reach: additional Listen-before-talk (LBT) features Note: No new standards needed for mode switch, channel selection and power control, new standards only needed for Listen-before-talk (LBT) requirements for global reach * These 5GHz bands typically require DFS, Dynamic Frequency Selection 14
  • 15. Smart selection of unlicensed bands for improved performance Selecting different bands is also the main solution for multiple operators to coexist 5.33 GHz 5.15 GHz Unlicensed 5GHz band 20 MHz * * * 5.49 GHz * 20 * MHz 5.835 GHz * * * * * * * * * * * 20 MHz Up to 500 MHz available Select different unlicensed bands for neighboring nodes Extends coverage and enhances capacity and data rates at cell edges Solid anchor in licensed spectrum layer (re-use 1) Provides seamless mobility, predictable quality and control 15 * These 5GHz bands typically require DFS, Dynamic Frequency Selection
  • 16. More and wider unlicensed spectrum around 5 GHz 5 GHz band — ~500 MHz available with more in the pipeline US1, Korea5, Europe, Japan US, Korea, China, Europe, Japan, India 5.15 GHz 20 MHz UNII-1 5150-5250 MHz * * 5.71 GHz 5.49 GHz 5.33 GHz * US, Korea, India, China2, considered in EU3 20 * MHz * UNII-2 5250-5350 MHz * * * * * * * * UNII-2 5470-5725 MHz * * 5.735 GHz * 5.835 GHz 5.925 GHz 20 MHz UNII-3 5725 – 5825 MHz ISM 5725 – 5850 MHz 120 MHz could be made available in e.g. the US4/EU3 1 75 MHz could be made available in e.g. the US4/EU3 Channel 120, 124 and 128 (5.6-5.65 GHz) currently not permitted in the US. 2 5725MHz-5850MHz has been assigned to ISM services in China 3 Study of 5350MHz-5470MHz and 5725MHz-5925MHz use for license exempt is being planned in EU’. 4 Feasibility studies directed by the Middle Class Relief & Job Creation Act of 2012., in 5350-5470 MHz and 5850-5925 MHz . 4 5470-5650 MHz in Korea* These 5GHz bands typically require DFS, Dynamic Frequency Selection 16
  • 17. How robust LTE enhances user experience and performance Unlicensed spectrum Licensed spectrum Efficient LTE radio link Robust link designed for mobility with less overhead Coverage gain also due to ability to handle larger delay spreads Synchronous operation Handles interference bursts better Better coordination and scheduling Anchor in licensed spectrum Signaling in licensed spectrum means robust control Less overhead in unlicensed (no control plane signaling) 17
  • 18. A leader in all solutions to best leverage unlicensed spectrum Committed to end-to-end Wi-Fi, carrier Wi-Fi, bringing LTE Advanced to unlicensed spectrum Common LTE Advanced for licensed and unlicensed spectrum Licensed Spectrum Cleared spectrum for 3G/4G, ASA for 3G/4G Mobile operator managed service that aggregates licensed and unlicensed spectrum1 Exclusive use Mobile broadband 3G/4G for licensed and carrier Wi-Fi for unlicensed spectrum Mobile operator managed service with tighter Wi-Fi integration for better offload and enhanced services Unlicensed Spectrum Wi-Fi hotspots in unlicensed spectrum Multiple technologies (Wi-Fi, LTE in unlicensed) Shared use 1With Wi-Fi for backward compatibility Local area access for private/residential, enterprise users. Local area access 18
  • 19. Summary: Qualcomm committed to extending the benefits of LTE Advanced to unlicensed spectrum Unified LTE network Enhanced user experience 1 Robust LTE enables a better user experience with seamless mobility 3 Coexists with Wi-Fi 2 Features to protect Wi-Fi neighbors 4 Common core network, common authentication, security, management A leader in all solutions to best leverage unlicensed spectrum Wi-Fi, carrier Wi-Fi, interworking and LTE in unlicensed spectrum 19
  • 20. Questions? - Connect with Us www.qualcomm.com/technology http://www.qualcomm.com/blog/contributors/prakash-sangam BLOG @Qualcomm_tech http://www.youtube.com/playlist?list=PL8AD95E4F585237C1&feature=plcp http://www.slideshare.net/qualcommwirelessevolution http://storify.com/qualcomm_tech 20
  • 21. Thank you Follow us on: For more information on Qualcomm, visit us at: www.qualcomm.com & www.qualcomm.com/blog © 2013 QUALCOMM Incorporated and/or its subsidiaries. All Rights Reserved. Qualcomm is a trademark of Qualcomm Incorporated, registered in the United States and other countries. Other products and brand names may be trademarks or registered trademarks of their respective owners. References in this presentation to “Qualcomm” may mean Qualcomm Incorporated, Qualcomm Technologies, Inc., and/or other subsi diaries 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 Te chnologies, Inc., a wholly-owned subsidiary of Qualcomm Incorporated, operates, along with its subsidiaries, substantially all of Qualcomm’s enginee ring, research and development functions, and substantially all of its product and services businesses, including its semiconductor business, QCT. 21

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