Extending the Benefits of LTE-Advanced to Unlicensed Spectrum

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  • 1. November 2013Extending the benefits of LTE Advanced to unlicensed spectrum1

2. Mobile data traffic growth industry preparing for 1000xIndustry preparing for1000x data traffic growth*Richer contentMore devicesmore videoeverything connectedBestseller example:5.93(High Definition) GB Movie~2.49 GBMovie (Standard Definition)0.0014 GB Homepage1.8 GBGame for Android0.14 GBSoundtrack~7Billion25BillionInterconnected device forecast in 20202Cumulative smartphone forecast between 2013-201710.00091 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 1000x2 3. Rising to meet the 1000x mobile data challengeMore Small Cells3 4. Small cells in licensed spectrum is the foundation of 1000x User deployed 3G/4GOperator deployed 3G/4GTypically indoor small cellsIndoor/outdoor small cells14G Relays & Wireless BackhaulENTERPRISE RESIDENTIALMETROLeveraging unlicensed spectrum opportunistically Unlicensed technologies integrated with 3G/4G small cells 1Such as relay and Pico/Metro/RRH small cells for hotspots. RRH= Remote Radio Heads, in addition Distributed Antenna Systems are used in HetNets4 5. We need to make best use of all spectrum types for 1000x Licensed Spectrum Auctions of cleared spectrum for 3G/4GShared Licensed SpectrumUnlicensed SpectrumComplementary licensing for 3G/4G: Authorized Shared Access (ASA)Multiple technologies (Wi-Fi, LTE in unlicensed, BT & others)Exclusive useShared exclusive useShared useIndustrys top priority, ensures quality of service (QoS), mobility and controlASA required when government spectrum cannot be cleared within a reasonable timeframe, or at all locationsUnpredictable 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 successCommon global standardSupport for paired (FDD) and unpaired (TDD) spectrum Seamless interworking with 3G6 7. Extending the benefits of LTE Advanced to unlicensed spectrum Better performanceEnhanced user experienceLonger range and increased capacityThanks to LTE Advanced anchor in licensed spectrum with robust mobility LTE in Licensed F1 spectrum 700MHz to 3.8GHzIdeal for small cellsCarrier aggregation LTE in Unlicensed spectrum 5 GHzUnified LTE NetworkCoexists with Wi-FiCommon 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 spectrumthe foundation of mobile data and 1000xUnified LTE networkENTERPRISE RESIDENTIAL METROfor licensed and unlicensedOpportunistic useUntapped capacity for mobileWhile shared, unlicensed spectrum is free, it has unpredictable performance~500 MHz unlicensed spectrum available around 5 GHz, more in pipelineShorter rangeWider bands suitable for sharingHigher 5 Ghz spectrum, lower transmit power regulations ideal for small cellsEfficiently 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 talkfeatures1)Wi-Fi (unlicensed)Coordinate before/while talking (Synchronous operation)Bringing LTE benefitsto unlicensed spectrumCommon LTE core network 1. Seamless mobility and robust control signaling 1Depending onregion, listen before talk features generally required, except e.g. US, Korea and China2. Integrated authentication, security and management 9 10. Aggregate unlicensed spectrum with a solid anchor in licensed Unlicensed, e.g. 5 GHzLicensed, e.g. 2 GHzLicensed e.g. 2 GHz(Supplemental downlink example)(LTE Downlink, FDD example)(LTE Uplink, FDD example)F1F2A 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 aggregationF22Aggregated Fatter data pipeDownlinkUplinkNote: 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 candidate10 11. Leverages existing LTE standards, ecosystem and scale LTE transmitted according to unlicensed spectrum regulations, such as power levels Large scale, global1 LTE deployments200+ network launches in 80+ countries1in unlicensed spectrum 2 LTEUSA, Korea and China for LTE Advanced 3GPP R10 Targets 5 GHz unlicensed bands3 LTE in unlicensed spectrum everywhere Regulatory Listen Before Talk features require standards modifications Candidate technology for 3GPP R13R10 Common core network with common mobility, security, authentication etc.1PerGSA as of as of 3Q 2013R13Unified 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 versionWi-FiUp to 10%Access point penetrationFewer nodes at same capacity2%Wi-FiOr more capacityLTE in unlicensedInside-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.>2xx CapacityAssumptions:, 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-Fifeatures to protect Wi-Fi neighbors Can in many cases be a better neighbor to Wi-Fi than Wi-Fi itself>2x1xOperator A: Wi-FiIndoor and outdoor small cells1.2x1xOperator B: Wi-FiGain Operator B switches Wi-Fi to LTE in unlicensedWi-Fi in unlicensed HetNet in licensedAssumptions: 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-FiOperator B: LTE in unlicensedEveryone could be better off13 14. Coexists with Wi-Fifeatures to protect Wi-Fi neighbors 5.33 GHz5.15 GHzUnlicensed 5GHz band20 MHz***5.49 GHz*20 * MHz5.835 GHz***********20 MHzUp to 500 MHz availableDynamic channel selection based on interference Adjust transmit power to limit interference to other usersLonger 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 Selection14 15. Smart selection of unlicensed bands for improved performance Selecting different bands is also the main solution for multiple operators to coexist 5.33 GHz5.15 GHzUnlicensed 5GHz band20 MHz***5.49 GHz*20 * MHz5.835 GHz***********20 MHzUp to 500 MHz availableSelect different unlicensed bands for neighboring nodes Extends coverage and enhances capacity and data rates at cell edgesSolid 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, JapanUS, Korea, China, Europe, Japan, India 5.15 GHz20 MHzUNII-1 5150-5250 MHz**5.71 GHz5.49 GHz5.33 GHz*US, Korea, India, China2, considered in EU320 * MHz*UNII-2 5250-5350 MHz********UNII-2 5470-5725 MHz**5.735 GHz*5.835 GHz5.925 GHz20 MHzUNII-3 5725 5825 MHz ISM 5725 5850 MHz120 MHz could be made available in e.g. the US4/EU3 175 MHz could be made available in e.g. the US4/EU3Channel 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 Selection16 17. How robust LTE enhances user experience and performanceUnlicensed spectrumLicensed spectrumEfficient LTE radio link Robust link designed for mobility with less overhead Coverage gain also due to ability to handle larger delay spreadsSynchronous operation Handles interference bursts better Better coordination and schedulingAnchor 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 spectrumCommon LTE Advanced for licensed and unlicensed spectrumLicensed Spectrum Cleared spectrum for 3G/4G, ASA for 3G/4GMobile operator managed service that aggregates licensed and unlicensed spectrum1Exclusive useMobile broadband3G/4G for


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