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Lte technical overview Lte technical overview Presentation Transcript

  • LTE Technical OverviewLTE: TECHNOLOGY, BUSINESS AND COMPETITIVE LANDSCAPETHE PARK LANE HOTEL – JAKARTA, SEPTEMBER 29-30, 2010DR. IR. JOKO SURYANA
  • LTE Basic Technology
  • LTE Fundamental : Key Parameters LTE Technical Overview 3 View slide
  • LTE Fundamental : Technologies LTE Technical Overview 4 View slide
  • LTE Fundamental : OFDM• OFDM is a Multi Carrier Modulation• Symbols at rate R are serial to parallel converted to N parallel streams• Each stream is at rate R/N• Symbol duration per stream increased N times• Bandwidth per stream reduced N times• Each stream modulates one of N orthogonal carriers• Implemented easily with IFFT / FFT LTE Technical Overview 5
  • LTE Fundamental : OFDM LTE Technical Overview 6
  • LTE Fundamental : OFDMAdvantages :• Resistant to Multipath fading• Requires simple frequency domain equalization• Resistant to narrow band interference• Easy to implement with IFFT / FFT• Flexibility for adaptive loading (seen later)• Suitable for Space-Time and Space-Frequency antenna processing LTE Technical Overview 7
  • LTE Fundamental : OFDM Modulation NTs guard x X0 X0 XN-1 e j 0 Serial to Parallel x Add + Guard Ts e j 1 xn N 1 2 kn 1 X j XN-1 x xn  k e N N k 0 e j N 1 IFFT• Symbols X0 to XN-1 modulate N orthogonal Carriers• Performed with IFFT LTE Technical Overview 8
  • LTE Fundamental : Cyclic Prefix• After IFFT, a guard band (cyclic After IFFT prefix) is added at the beginning• Guard band duration must be > channel maximum delay• Guard band prevents Inter- Add guard Symbol Interference (ISI) due to multipath Tg To OFDM Symbol LTE Technical Overview 9
  • LTE Fundamental : Cyclic Prefix LTE Technical Overview 10
  • LTE Fundamental : Cyclic Prefix LTE Technical Overview 11
  • LTE Fundamental : Multipath LTE Technical Overview 12
  • LTE Fundamental : ISI in OFDM LTE Technical Overview 13
  • LTE Fundamental : OFDM Modem PSK or QAM IFFTbits Symbol Add P/S Mapping S/P Guard RF frequency PSK or QAM Frequency Symbol bits Remove FFT P/S S/P RF Domain De- Guard Equalizer Mapping General OFDM Modulation and Demodulation LTE Technical Overview 14
  • LTE Fundamental : OFDMA LTE Technical Overview 15
  • LTE Fundamental : OFDMA LTE Technical Overview 16
  • LTE Fundamental : OFDMA LTE Technical Overview 17
  • LTE Fundamental : OFDMA LTE Technical Overview 18
  • LTE Fundamental : OFDMA LTE Technical Overview 19
  • LTE Fundamental : OFDMA LTE Technical Overview 20
  • LTE Fundamental : SC-FDMA LTE Technical Overview 21
  • LTE Fundamental : SC-FDMA LTE Technical Overview 22
  • LTE Fundamental : SC-FDMA LTE Technical Overview 23
  • LTE Fundamental : SC-FDMA LTE Technical Overview 24
  • LTE Fundamental : SC-FDMA LTE Technical Overview 25
  • LTE Fundamental : SC-FDMA LTE Technical Overview 26
  • LTE Fundamental : MIMO LTE Technical Overview 27
  • LTE Fundamental : MIMO LTE Technical Overview 28
  • LTE Fundamental : MIMO LTE Technical Overview 29
  • LTE Fundamental : Spatial Multiplexing LTE Technical Overview 30
  • LTE Fundamental : Precoding LTE Technical Overview 31
  • LTE Fundamental :SU-MIMO & MU-MIMO LTE Technical Overview 32
  • LTE Fundamental : AAS LTE Technical Overview 33
  • LTE Fundamental : AAS LTE Technical Overview 34
  • LTE Fundamental : MIMO Beamforming LTE Technical Overview 35
  • LTE Fundamental : BW Scalability LTE Technical Overview 36
  • LTE Fundamental : BW Scalability LTE Technical Overview 37
  • LTE Fundamental : Core bands LTE Technical Overview 38
  • LTE Fundamental :Building Penetration vs Band LTE Technical Overview 39
  • LTE Fundamental : Frame Structure LTE Technical Overview 40
  • LTE Fundamental : Frame Structure LTE Technical Overview 41
  • LTE Fundamental : Frame Structure LTE Technical Overview 42
  • LTE Fundamental : Frame Structure LTE Technical Overview 43
  • LTE Fundamental : Frame Structure LTE Technical Overview 44
  • LTE Fundamental : Frame Structure LTE Technical Overview 45
  • LTE Fundamental : Frame Structure LTE Technical Overview 46
  • LTE Fundamental : NW Architecture LTE Technical Overview 47
  • LTE Fundamental : NW Architecture LTE Technical Overview 48
  • LTE Fundamental : NW Architecture LTE Technical Overview 49
  • LTE Fundamental : NW Architecture LTE Technical Overview 50
  • LTE Fundamental : NW Architecture LTE Technical Overview 51
  • LTE Fundamental : NW Architecture LTE Technical Overview 52
  • LTE Fundamental : NW Architecture LTE Technical Overview 53
  • LTE Fundamental : LTE/SAE Key Features LTE Technical Overview 54
  • LTE Fundamental : LTE/SAE Key Features LTE Technical Overview 55
  • LTE Fundamental : LTE/SAE Key Features LTE Technical Overview 56
  • LTE Fundamental : LTE/SAE Key Features LTE Technical Overview 57
  • LTE Fundamental : Network Element LTE Technical Overview 58
  • LTE Fundamental : Network Element LTE Technical Overview 59
  • LTE Fundamental : Network Element LTE Technical Overview 60
  • LTE Fundamental : Network Element LTE Technical Overview 61
  • LTE Fundamental : Network Element LTE Technical Overview 62
  • LTE Fundamental : Network Element LTE Technical Overview 63
  • LTE Fundamental : Network Element LTE Technical Overview 64
  • LTE Fundamental : Network Element LTE Technical Overview 65
  • LTE Fundamental : Network Element LTE Technical Overview 66
  • LTE Fundamental : Interworking LTE Technical Overview 67
  • LTE and LTE-Advanced Standards
  • Contents• 3GPP TSG-RAN standardisation activities• LTE Release 8&9 overviews• LTE Release 10 (LTE-Advanced) – Motivation – Key requirements – Key features – Performance evaluations LTE Technical Overview 69
  • 3GPP TSG-RANStandardisation Activities
  • Releases of 3GPP Specifications 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013Release 99 W-CDMA Release 4 1.28Mcps TDD Release 5 HSDPA Release 6 HSUPA, MBMS Release 7 HSPA+ (MIMO, HOM etc.) ITU-R M.1457 Release 8 LTE IMT-2000 Recommendation Minor LTE Release 9 enhancements Approved at ITU-R WP5D ITU-R M.[IMT.RSPEC] meeting in Oct. 2010 as a IMT- Release 10 LTE-Advanced Advanced technology IMT-Advanced Recommendation Release 11 LTE Technical Overview 71
  • Technology Evolution path in 3GPP StandardsRelease 99 Release 4 Release 5 Release 6 Release 7 Release 8 Release 9 Release 1025 series WCDMA HSDPA HSUPA HSPA+ 36 series LTE LTE-A LTE Technical Overview 72
  • LTE and HSPA Evolutions 10 G 3 Gbps 64QAM, 8x8 MIMO, 100MHz BW 1GPeak Throughput (bps) 300 Mbps 336 Mbps? 64QAM, 4x4 MIMO, 20MHz BW 168 Mbps 2x2 MIMO, LTE evolution 8 carrier 84 Mbps 2x2 MIMO, 100 M (40 MHz BW) 4 carrier 42 Mbps 2x2 MIMO, (20 MHz BW) 21-28 Mbps Dual cell 64QAM, (10 MHz BW) 14 Mbps 2x2 MIMO 64QAM or or 2x2 MIMO Dual cell 10 M (10 MHz BW) HSPA evolution Release 5 Release 6 Release 7 Release 8 Release 9 Release 10 Release 11 3GPP Release # LTE Technical Overview 73
  • LTE Current Status LTE Technical Overview 74
  • LTE Release 8 & 9
  • LTE Release 8 Key Features• High spectral efficiency • Very low latency – OFDM in Downlink – Short setup time & Short • Robust against multipath transfer delay interference – Short HO latency and • High affinity to advanced interruption time techniques • Short TTI – Frequency domain channel-dependent • RRC procedure scheduling • Simple RRC states – MIMO • Support of variable – DFTS-OFDM(“Single-Carrier bandwidth FDMA”) in Uplink • Low PAPR – 1.4, 3, 5, 10, 15 and 20 MHz • User orthogonality in frequency domain – Multi-antenna application LTE Technical Overview 76
  • Rel-9 LTE features• Small enhancements from LTE Release 8 mainly for higher layer – HeNB (Home eNode B) • HeNB Access Mode – Rel-8: Closed Access Mode – Rel-9: Open and Hybrid Mode • HeNB Mobility between HeNB and macro – Rel-8: Out-bound HO – Rel-9: in-bound and inter-CSG HO – SON (self-organizing networks) • Rel-8: Self configuration, Basic self-optimization • Rel-9: RACH optimization, etc – MBMS • Rel-8: Radio physical layer specs • Rel-9: Radio higher layer and NW interface specs – LCS (Location Services) • Rel-8: U-Plane solutions • Rel-9: C-Plane solutions, e.g. OTDOA LTE Technical Overview 77
  • Summary 3GPP LTE Release 8 / Release 9A new radio interface specified in Release 8 and enhanced in Release 9Provides: • Broadband data throughput: • Downlink target 3-4 times greater than HSDPA Release 6 • Uplink target 2-3 times greater than HSUPA Release 6Significantly reduced latencyHigh mobilityThe basis for 17 commercial launches (as at 12 Jan)64 commercial launches expected by end of 2012125 operators publicly committed to launchLTE set to be the mobile broadband technology LTE Technical Overview 78 78
  • LTE Release 10(LTE-Advanced)
  • LTE Advanced : Background LTE Technical Overview 80
  • Motivation of LTE-Advanced• IMT-Advanced standardisation process in ITU-R• Additional IMT spectrum band identified in WRC07• Further evolution of LTE Release 8 and 9 to meet: – Requirements for IMT-Advanced of ITU-R – Future operator and end-user requirements LTE Technical Overview 81
  • Key Requirements for LTE-Advanced LTE-Advanced (LTE Release 10)• LTE-Advanced shall be deployed as an LTE Release 9 evolution of LTE Release 8 and on new bands.• LTE-Advanced shall be backwards compatible LTE Release 8 with LTE Release 8 Smooth and flexible system migration from LTE-Advanced contains all features of Rel-8 LTE to LTE-Advanced LTE Rel-8&9 and additional features for further evolution LTE-Advanced evolved from LTE Rel-8 LTE Rel-8 cell LTE-Advanced cell LTE Rel-8 terminal LTE-Advanced terminal LTE Rel-8 terminal LTE-Advanced terminal An LTE-Advanced terminal can An LTE Rel-8 terminal can work work in an LTE Rel-8 cell in an LTE-Advanced cell LTE-Advanced backward compatibility with LTE Rel-8 LTE Technical Overview 82
  • Target performance of LTE-Advanced Rel. 8 LTE LTE-Advanced IMT-Advanced DL 300 Mbps 1 Gbps Peak data rate 1 Gbps(*) UL 75 Mbps 500 Mbps Peak spectrum efficiency DL 15 30 15 [bps/Hz] UL 3.75 15 6.75 Antenna Rel. 8 LTE*1 LTE-Advanced*2 IMT-Advanced*3 configuration Average DL 2-by-2 1.69 2.4 – spectrum efficiency 4-by-2 1.87 2.6 2.2 [bps/Hz/cell] 4-by-4 2.67 3.7 – UL 1-by-2 0.74 1.2 – 2-by-4 – 2.0 1.4 x 1.4-1.7 Cell edge user DL 2-by-2 0.05 0.07 – throughput[bps/Hz/cell/user] 4-by-2 0.06 0.09 0.06 4-by-4 0.08 0.12 – UL 1-by-2 0.024 0.04 – 2-by-4 – 0.07 0.03 *1 See TR25.912(Case 1 scenario) *2 See TR36.913(Case 1 scenario) *3 See ITU-R M.2135(Base Coverage Urban scenario) LTE Technical Overview 83
  • Key Features in LTE Release 10 LTE Technical Overview 84
  • Key Features in LTE Release 10 LTE Technical Overview 85
  • Key Features in LTE Release 10 100 MHz Support of Wider Bandwidth(Carrier Aggregation) • Use of multiple component carriers(CC) to extend bandwidth up to 100 MHz • Common physical layer parameters between component carrier and LTE Rel-8 carrier f  Improvement of peak data rate, backward compatibility with LTE Rel-8 CC Advanced MIMO techniques • Extension to up to 8-layer transmission in downlink • Introduction of single-user MIMO up to 4-layer transmission in uplink • Enhancements of multi-user MIMO  Improvement of peak data rate and capacity Heterogeneous network and eICIC(enhanced Inter-Cell Interference Coordination) • Interference coordination for overlaid deployment of cells with different Tx power  Improvement of cell-edge throughput and coverage Relay • Type 1 relay supports radio backhaul and creates a separate cell and appear as Rel. 8 LTE eNB to Rel. 8 LTE UEs  Improvement of coverage and flexibility of service area extension Coordinated Multi-Point transmission and reception (CoMP) • Support of multi-cell transmission and reception  Improvement of cell-edge throughput and coverage LTE Technical Overview 86
  • Carrier and Spectrum Aggregation LTE Technical Overview 87
  • BW Extention LTE Technical Overview 88
  • Enhanced Multiantenna Techniques LTE Technical Overview 89
  • Uplink MIMO LTE Technical Overview 90
  • Downlink MIMO LTE Technical Overview 91
  • Coordinated Multipoint (CoMP) Transmission and Reception LTE Technical Overview 92
  • CoMP Techniques LTE Technical Overview 93
  • System level CoMP Joint Processing : A simple example LTE Technical Overview 94
  • RelayingLTE Technical Overview 95
  • RelayingLTE Technical Overview 96
  • LTE-Advanced Performance Highlights LTE Technical Overview 97
  • LTE-Advanced Performance Highlights LTE Technical Overview 98
  • 3GPP LTE-Advanced Self-Evaluation• The self-evaluation results shows: – For LTE Release 10, FDD RIT and TDD RIT Component meets the minimum requirements of all 4 required test environments, individually. – Baseline configuration exceeding ITU-R requirements with minimum extension • LTE release 8 fulfills the requirements in most cases (no extensions needed) • Extensions to Multi-user MIMO from Release 8 fulfills the requirements in some scenarios (Urban Macro/Micro DL) Spectrum Efficiency: FDD DL, Indoor (InH) ITU-R requirement 7 6.6 6.1(bps/Hz/cell) 6 5.5 Cell average 4.8 4.5 5 4.1 4 3.0 3 2 1 0 Rel-8 SU-MIMO 4x2 Rel-10 MU-MIMO 4x2 L=1,2,3 L=1,2,3 LTE Technical Overview 99
  • LTE-Advanced Experiments in NTT DOCOMODOCOMO developed LTE-Advanced experimental system aligned with 3GPP LTE Release10 specifications◆ Laboratory experimentsTotal throughput of 1 Gbps for 2 Mobile stations in downlink was achieved by applying4x2 multi-user MIMO technique◆ Field experimentsThroughput of 600 Mbps in downlink and 200 Mbps in uplink was achieved by applying2x2 single-user MIMO technique ◆ Laboratory ◆ Field @ Yokosuka, Japan Hills 100 m 200 m 300 m 400 m Base station • Tx power: 10 W/ant. Base Mobile • Antenna: 4 Tx/Rx • DL Bandwidth: station station 100 MHzLTE-Advanced key technologies, e.g., Mobile stationcarrier aggregation and enhanced MIMO • Tx Power: 1 W/ant. • Antenna: 2 Tx/Rx LTE Technical Overview • UL Bandwidth: 40 MHz
  • NTT DOCOMO Field TrialPanorama View 10 km/hDownlink 600 Mbps 5 CCs 2x2 SU- MIMOUplink 200 Mbps 2 CCs 2x2 SU- MIMO LTE Technical Overview 101May 18, 2011 LTE World Summit 2011
  • Summary LTE-Advanced Release 10Not a new technology as such, but a point of maturity along the LTE evolutionpath. LTE Advanced provides:Support for wider Bandwidth (Up to 100MHz)Downlink transmission scheme • Improvements to LTE by using 8x8 MIMO • Data rates of 100Mb/s with high mobility and 1Gb/s with low mobilityUplink transmission scheme • Improvements to LTE • Data rates up to 500Mb/sRelay functionality • Improving cell edge coverage • More efficient coverage in rural areasCoMP (coordinated multiple point transmission and reception) • Downlink coordinated multi-point transmission • Uplink coordinated multi-point receptionLocal IP Access (LIPA) & Enhanced HNB to allow traffic off-load LTE Technical Overview 102 10 2
  • LTE Technical Overview 103
  • Conclusions• LTE Release 8 – Specification completed and stable – Commercially deployed and committed to deploy by many operators all over the world• LTE Release 9 – Small enhancements of LTE Release 8 – Specification completed and stable• LTE Release 10 – Stage 3 frozen and stabilized – Accepted as a technology of IMT-Advanced by ITU-R WP5D – Materials and specifications submitted to ITU-R WP5D for ITU-R recommendation M.[IMT.RSPEC] LTE Technical Overview 104