Mobile Broadband driven by Convergence of IP and LTE technologies

Transcription

1 Mobile Broadband driven by Convergence of IP and LTE technologies Arpit Joshipura VP, GF Strategy & Market Development Ericsson Silicon Valley Ali Khayrallah Director of Research Ericsson North America

2 Today s Topics Mobile Broadband and IP Convergence Technology Details 2

3 Key Takeaways 1 Mobile Broadband is next big global phenomena 2 IP & LTE Technologies enable convergence 3 Ericsson is committed to drive ecosystem globally towards 50B Connections in

4 Broadband goes mobile From household to individuals and devices Subscriptions (million) Mobile Fixed Mobile dominates broadband access in 2014 Source: Q Ericsson 4

5 Ericsson North America Increased Momentum in 2009 Network Transformation AT&T, T-Mobile Partner AT&T Wireline Domain Partner Verizon & Metro PCS LTE/EPC Services Transformation Sprint Wireline and Wireless Increased R&D Nortel CDMA and LTE Assets Ericsson Silicon Valley: Mobility + IP + Broadband Convergence Ericsson Operator Momentum with increased R&D 5

6 Ericsson Silicon Valley Position Ericsson leadership mobile communication Silicon Valley leadership in internet and IP Ericsson complements Silicon Valley companies 6

7 Ericsson Silicon Valley Ericsson Global IP Business Ericsson Global Broadband Access Ericsson Global Transport & Optical Mobile Broadband & Applications Ecosystem External Collaboration Ericsson Group Functions Technology, Research, Strategy, Marketing... Headquarter Group Functions beyond Business Functions 7

8 Mobile Packet Networks Flat IP 3G GGSN SGSN SAE/LTE MME SAE-GW Core Iub Iub Core RAN RNC Iur RNC RAN S1 S1 Iub Iub NodeB NodeB enb X2 enb 8

9 LTE integrated with 2G/3G Mobile Networks Smooth multi-access evolution LTE enodeb GGSN to Packet Gateway SGSN to Mobility server CDMA integration Packet Gateway SGSN/ MME Server BSC RNC IP networks Charging, Policy Control, IMS Mobile IP PDSN/HSGW GSM, HSPA TD-SCDMA LTE CDMA 9

10 Converged Packet Gateway Part of Evolved Packet Core World s Most Sophisticated Core SGSN MME Any to IP Transformation Converged Edge Fixed & Mobile GGSN SAPC HSS Best of Both worlds - LTE, GSM/WCDMA, CDMA - Fixed MSER networks Mobility + Fixed throughput Software upgrades to SGSN/GGSN 10

11 IP in Relation to Protocol Stack Service/Protocol Stack Voice Video Internet IP VPN 3G+ / 4G Ethernet Legacy ATM Legacy SDH IP Edge CESR Full IP/MPLS capable, from L2 to L7, user & session aware, foundation All-IP network Carrier-Ethernet Switch Routers, but support legacy technologies and advanced L2 capabilities MPLS + Packet mux + dynamic control plane + Fast restoration + OAM Ethernet Optical Layer LSR Core routing and switching technology, price/performance pressured From dark fiber to DWDM equipment class 11

12 Towards 50 Billion Connections Today Mobile Fixed >4 billion subscribers Personal services, Mobility, Interoperable Subscriber scale optimized >400 million subscribers Per household Cost/bit optimized Tomorrow Full Service Broadband 50 billion connections Personal, Mobility, Interoperable Subscriber, device & cost/bit optimized Mobile excellence proven for personalized services, interoperability and scale 12

13 Key Takeaways 1 Mobile Broadband is next big global phenomena 2 IP & LTE Technologies enable convergence 3 Ericsson is committed to drive ecosystem globally towards 50B Connections in

14 Today s Topics Mobile Broadband and IP Convergence Technology Details 14

15 Mobile Broadband A global success story 267 commercial HSPA networks Ericsson: 127 (48%) >350 million WCDMA/HSPA subscribers 1470 HSPA devices 171 suppliers Commercial HSPA networks HSPA network launch commitments Devices Suppliers Source: GSA Global mobile Suppliers Association and Informa: May/June

16 Cellular System Design Bandwidth Carrier frequency Power Cell sites Air interface Antennas Receivers Standards / proprietary 16

17 Air Interface Abstract TDMA, CDMA, OFDM etc Divy up resources of time, frequency, energy, space Largely equivalent Reality Finite complexity and real technology Standards deviate from basic concept Introduce specific limitations Results in eco-system of specific techniques Advantages in particular scenarios Different generations Different technology ambitions New techniques go with new systems Unfair comparisons 17

18 WCDMA Background WCDMA ( 3G ) Basics developed mid-90 s, standard ready -99 Circuit-switched voice ISDN-like packet data (typically up to 384 kbit/s) HSPA ( Turbo-3G ) Packet-data improvement add-on to WCDMA First version ~2002 Data rates up to 42 Mbit/s (downlink), 11 Mbit/s (uplink) HSPA is an evolution of WCDMA Incorporating the basic principles from last session R99 Rel4 Rel5 Rel6 Rel7 Rel8 Rel10 WCDMA HSDPA HSPA HSPA evolution 18

19 WCDMA Basics Spreading f Narrowband signal f Wideband signal f f Spreading De-spreading One bit Channel One bit Rapidly varying spreading code Rapidly varying spreading code 19

20 HSPA Basics Downlink and Uplink Similar principles for uplink and downlink But there are some fundamenal differences Shared resource Downlink Power, codes Tx power centralized Uplink Interference headroom Tx power distributed Link adaptation Rate adaptation (orthogonal no near-far problem) Power control (non-orthogonal near-far problem) Scheduling favorable conditions high user data rate favorable conditions less interference 20

21 HSPA Evolution HSPA High-Speed Packet Access Evolution of 3G/WCDMA Gradually improved performance in existing networks at a low additional cost Data rates up to 42 Mbit/s in 5 MHz Evolution continues Wider bandwidth, recevier improvements, protocol enhancements,... R99 Rel4 Rel5 Rel6 Rel7 Rel8 Rel10 WCDMA HSDPA HSPA HSPA evolution Downlink 14 Mbit/s Downlink 14 Mbit/s Downlink 28 Mbit/s Uplink 5.7 Mbit/s MIMO Uplink 11 Mbit/s 16 QAM Downlink 42 Mbit/s MIMO + 64QAM Uplink 11 Mbit/s 16 QAM 21

22 Mobile System Evolution Global Support GSM Track (3GPP) GSM WCDMA HSPA TD-SCDMA CDMA Track (3GPP2) CDMA One EVDO Rev A LTE FDD & TDD LTE is the Global standard for Next Generation FDD and TDD 22

23 Spectrum Flexibility Spectrum flexibility operation in differently-sized spectrum allocations max 110 resource blocks min 6 resource blocks 1.25 MHz 2.5 MHz 5 MHz 10 system MHzbandwidth N RB 15 MHz 20 MHz cell search and broadcast of basic system information in the 6 center resource blocks Downlink (DL) Support for paired and unpaired spectrum allocations Uplink (UL) FDD Half duplex FDD TDD f DL f DL f DL/UL f UL f UL Paired spectrum Reduced UE complexity Unpaired spectrum 23

24 LTE radio access Downlink: OFDM Parallel transmission on large number of narrowband subcarriers Uplink: DFTS-OFDM DFT-precoded OFDM DFT precoder OFDM modulator IFFT Cyclic-prefix insertion DFT IFFT Cyclic-prefix insertion Benefits: Avoid own-cell interference Robust to time dispersion Main drawback Power-amplifier efficiency TX signal has single-carrier properties Improved power-amplifier efficiency Improved battery life Reduced PA cost Critical for uplink Equalizer needed Rx Complexity Not critical for uplink 24

25 Downlink OFDM with Cyclic Prefix Parallel transmission using a large number of narrowband sub-carriers Multi-carrier transmission Typically implemented with FFT f 1 f2 Δf = 15 khz S/P f M Σ 20 MHz (example) Insertion of cyclic prefix prior to transmission Improved robustness in time-dispersive channels requires CP > delay spread Spectral efficiency loss Copy T CP 4.7 μs T ECP 16.7 μs 25

26 Cyclic Prefix Simpler Receiver Transmitter symbol block IFFT a b c d S/P a b c d add CP c d a b c d Time dispersion path 0 CP data path 1 CP data Receiver discard discard S/P FFT 26

27 Basic Principles Shared-channel transmission Packet-data only No CS support Channel-dependent scheduling In time and frequency data1 data2 data3 data4 Hybrid-ARQ with soft combining 27

28 MIMO, ICIC, and MBSFN Multi-antenna support Integral part of LTE All terminals support at least 2 Rx antennas TX Multi-layer layer transmission ( MIMO ) ICIC Inter-Cell Interference Coordination To improve cell-edge performance Reduced Tx power MBSFN Multicast-Broadcast Single-Frequency Network 28

29 One subframe Downlink Physical Layer CRC insertion (24 bits) Rel 6 Turbo coding (with QPP interleaver) Rate matching, redundancy version generation Scrambling for inter-cell interference randomization CRC CRC Coding Coding HARQ HARQ Scrambling Scrambling 1 transport 2 transport blocks per TTI Modulation (QPSK, 16QAM, 64QAM) Modulation Modulation Mapping to transmission layers (for multi-layer transmission) Layer map. Precoding (for multi-rank transmission) Precode Resource block mapping Resource block mapping Resource block mapping 29

30 Multi-antenna transmission techniques Diversity for improved system peformance Beam-forming for improved coverage (less cells to cover a given area) SDMA for improved capacity (more users per cell) Multi-layer transmisson ( MIMO ) for higher data rates in a given bandwidth The multi-antenna technique to use depends on what to achieve 30

31 VoIP capacity Environment LTE* IMT-Advanced requirement Indoor Hot Spot Urban Micro Urban Macro High Speed * According to 3GPP ITU submission / TR v9.0.0 Very high VoIP capacity, substantially exceeding targets for IMT-Advanced 31

32 LTE evolution towards LTE-Advanced LTE-Advanced is the next major step for LTE Corresponding to LTE release 10 Direct evolution of the first release of LTE The 3GPP candidate for IMT-Advanced radio access ITU Circular Letter Proposals Evaluation Specification Submission of candidates for IMT-Advanced IMT-Advanced recommendation 3GPP Study Item Work Item IMT-Advanced WS (Shenzhen) Initial ITU submission ready Final submission LTE release 10 ( LTE-Advanced ) 32

33 33