The Path to 4G_ LTE and LTE-Advanced by bestt571

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									The Path to 4G: LTE
and LTE-Advanced


                                                   James Seymour
                                                   Senior Director
                                                    Alcatel-Lucent


        4G Technology Roadmap - Hosted by 4G Americas
Applications & Devices Driving Bandwidth


                Feature Phones                Data Friendly                Smartphones        Tablet Computers
     One                                     Feature Ph
                                             F       Phones
 megabyte
    = one
   digital     Voice Calls:                Voice Calls:                 Voice Calls:          Web Browsing:
               4-11 MB/Hr                  4 -11 MB/Hr                  4-11MB/Hr             350MB
  book, 45
 seconds of    Web Browsing:               Web Browsing:                Web Browsing:         Net Radio:
  music, 20    20 MB                       30 MB                        100 MB                140 MB
 seconds of    Email: 20 MB                Email: 50 MB                 Net Radio:            YouTube Videos:
  medium                                                                70 MB                 150 MB
   quality
                                                                        YouTube Videos:       Email: 100 MB
    video
                                                                        50 MB
                     80 MB                                              Email: 50 MB
                                                                                              *high-end
Month Total*




                                                                                               netbooks or
                                               185 MB                                          laptops model
    hly




                                                                                                           g e
                                                                                               about 30% higher
                                                                             800 MB
                                                                                              1,900 MB (1.9GB)
* Estimated    Source: BusinessWeek (February 2010), Data: Internal Alcatel-Lucent Research




                                4G Technology Roadmap - Hosted by 4G Americas
       Smartphone User Profile for 4G

MBps/month/user
   3,000

                                                                             Gaming
   2,500
                                                                             Web Browsing
                                                                             Audio Streaming
   2,000
                                                                             Downloads

   1,500                                                                     All Video


   1,000
                                                                             Cloud (non-Video)
    500                                                                      P2P
                                                                             SMS/MMS/IM/Voice
      0
            2010     2011       2012         2013         2014        2015


           High Growth in Web, Streaming, Interactive Video Apps
   Data Usage per LTE user projected t grow f
   D t U                      j t d to                 to 2.5GB
                                            from 700MB t 2 5GB

                      4G Technology Roadmap - Hosted by 4G Americas
 Meeting the Fast Growing Wireless Data Capacity
          and User Experience Demands
Broadband Capacity




                                                                      E2E IP Service /
              4G/LTE/
            LTE-Advanced                   Small      HetNet         Policy Management
                                           Cells

      3G+                                                 SON
                           2G                 WiFi
                                          Network Topology
                                             Evolution

      Leverage LTE
    Spectral Efficiency
    and New Spectrum                                                      Cost-Efficiency / QoE
                                                                          Cost Efficiency

                                4G Technology Roadmap - Hosted by 4G Americas
 Achieving the End-to-End Solution
                                                                                                       Subscriber Apps
                                                                                                      and Services
                                                                           MME          HSS


                                                                                 PCRF
                                                                        PGW              IMS,
                                 eNodeB                                             Mobile TV, etc.
                                                                 SGW
                   Flexible LTE            Field proven                            Application
   Device
                   Radio Access           Aggregation and
                                           gg g             Core Network      Prototyping & Service
                                                                                    yp g
Partnerships
                     Options                 Transport                         Delivery Platforms



                 LTE Baseband Unit                          SGW & PGW
                                               Service
                                               Router

                                          Aggregation
                Plug-in   Remote head       Router             MME



               Small Cells /                Microwave
               Specific                                        PCRF        HSS
               Deployments


      l    l        i
     Alcatel-Lucent is paving the way to new wireless b i
                          i    h              i l                d l
                                                      business models.

                               4G Technology Roadmap - Hosted by 4G Americas
Carrier Aggregation (CA) for LTE-Advanced

                  Carrier Aggregation combines multiple LTE carriers

                              Intra-band
                              Intra band example: 40 MHz




                                       20 MHz   20 MHz
                                                                       Carrier Aggregation
                                                                   combinations defined as non-
                                                                        release specific.
                               Inter band
                               Inter-band example: 40 MHz



                                   20 MHz            20 MHz
                                                          Freq




 CA Critical for meeting ITU IMT-Advanced Peak Rate Requirement (1 Gbps)


6 | August 2010
                             4G Technology Roadmap - Hosted by 4G Americas
        MIMO Enhancements for LTE-Advanced
SM = Spatial Multiplexing
RI = Rank Indication
CQI = Channel Quality Indication
PMI = Pre-coding Matrix Indication         Decision Tree                                       Rel-10 (LTE-Advanced)
RS = Reference Symbol                                                                         adds 8x8 DL and 4x4 UL

        SIMO                                                         4x2, 4x4   MIMO                                     2x2, 4x2 or 4x4
                                                     Linear Array                                          Diversity Array
                     1x2 or 1x4
      Single
     Antenna
     A
                                        Port 5               MU-MIMO
                                     Dedicated RS                                             Open Loop                       Closed Loop
                                     Dual Layer (Rel-9)                                       RI, CQI, no PMI                    RI, CQI, PMI



      Port
      P t0                                           Single Stream              Multi-Stream             Single Stream       Multi-Stream
    Common RS                                               Rank 1                 Rank 2-4                     Rank 1            Rank 2-4

                   Rel-10 (LTE-Advanced)
                improves codebook/feedback                Transmit                                        Closed Loop
                                                                                Open Loop SM                                  Closed Loop
                            MU MIMO
                        for MU-MIMO
                                                          Diversity
                                                          Di    it                                          Rank=1
                                                                                                            R k 1                 SM
                                                                                                           Precoding


LTE-Advanced builds off the wide range of Rel-8/Rel-9 MIMO capabilities to
              improve peak rates and spectral efficiency
              i             k        d         l ffi i

                                       4G Technology Roadmap - Hosted by 4G Americas
    MU-MIMO Enhancement for LTE-Advanced

   MU-MIMO enhancements provide up to 50% spectral efficiency gain
   Dynamic switching between SU- and MU-MIMO supported
     y                g                           pp
   Up to 2 layers per UE in MU-MIMO
   Enhanced CSI feedback structure and codebook design



                                                 CSI
                                                  feedback




                     Enhanced
                     MU-MIMO
                     MU MIMO



           MU-MIMO Enhancements critical for meeting IMT-Advanced
           MU MIMO                                   IMT Advanced
                    DL spectral efficiency requirements
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            Co-ordinated Multi-Point (CoMP)
                 Multiple Approaches
                      p    pp
         Interference Avoidance                           Network MIMO




                 Potential 2x spectral efficiency gain , but complex 


Advanced forms of CoMP only provide ~2X spectral efficiency increase          
  still need more cells to meet faster growing wireless data capacity demands


                       4G Technology Roadmap - Hosted by 4G Americas
     Where Small Cells Provide Gains


                                     500x
          nsity or traffi increase

                                     200x


                                      75x                    Metro Cell
                        ic




                                      20x


                                             Indoor Home
                                             I d    H
        Den




                                      5x
                                             & Enterprise

                                       1
                                                                   Add Carrier on
                                                                       Macro
                                                                                            Source: Bell Labs Modeling analysis
                                             250   1,000   5,000 10,000 25,000 100,000

                                               Hotspot Size (Area in Square Meter)

Home, E t
H            i
      Enterprise and Metro Cells compliment the Macro Network
                   d M t C ll        li   t th M      N t   k

                                            4G Technology Roadmap - Hosted by 4G Americas
   Interference Management with Small Cells
                 Frequency Selective Scheduling (FSS), Power Control (PC) and Inter-Cell Interference
                        Coordination (ICIC) enables same carrier HetNet deployments for LTE




                                                                                                                           Interference
                                                                   Pico Cell
 Macro eNB
                                                                                                                                 Control
                                                                                                                                 Data

                     LTE Rel-8 capabilities such can manage LTE HetNet interference.

                      LTE-Advanced features such as Carrier Aggregation (CA) and Enhanced ICIC                       CC1               CC2
                         (eICIC) will further improve same carrier HetNet performance for LTE
                                                                                                                   High power        High power
                                                                                                                   PDCCH           PDCCH- less
                                                                              UE on carrier 1 with
                                                                              control on carrier 1   Macro cell

              UE on carrier 2 with
                                                                                                                        CA Avoids control
              control on carrier 1                                                                                     channel interference
                                                                                                                  PDCCH-less           PDCCH
Macro eNB                     UE on carrier 2 with
                              control on carrier 2     UE on carrier 1 with                          Small cell
                                                       control on carrier 2

                                                                                                                   Low power          Low power




            LTE-Advanced techniques further help to manage control channel Interference.



                                      4G Technology Roadmap - Hosted by 4G Americas
                                            LTE Small Cells/HetNets Performance
                                                                                            Source: Bell Labs Research
                                                                                                                               3GPP Case I with Configuration 4a
                                                                                                                   1
                                       Case1 3D - PL model 1 - PS4a - 30dBm pico TX power
                                                         No Biasing
                               5000
                                      O    lll
                                      Overalll
                               4500   Macro only                                                                  0.8
                                      Pico only
                               4000
                ghput [Mbps]




                               3500
                                                                                                                  0.6
                               3000




                                                                                                              F
                                                                                                          C.D.F
Aggregated throug




                               2500

                               2000
                                                                                                                  0.4
                               1500
                                                                                                                                                       No Hotzone
                               1000
                                                                                                                                                       10 Hotzone with 0dB Bias
                                500                                                                               0.2                                  10 Hotzone with 3dB Bias
                                 0
                                        0            1              2              4            10
                                                                                                                                                       10 Hotzone with 6dB Bias
                                                   Number of pico cells per macro cell                                                                 10 Hotzone with 9dB Bias
                                                                                                                   0
                                                                                                                          -2                      -1                      0
                                                                                                                       1010                                             10
                                                                                                     Normlized User Throughput (bps/Hz)
                               Key Assumptions: Macro: Outdoor RRH based on 3GPP Case1 (ISD = 500m, 2 GHz, 46 dBm),
                                                     Small Cell: 30 dBm, 4a dropping criteria  60 UEs and constant number of small cells per macro; 2 UEs in
                                                     40m radius around each small cell; small cells and remaining UEs uniformly distributed,
                                      LTE Small Cell/HetNets provide significant capacity improvement critical for
                                                 addressing the fast growing wireless data demands
                                                                         4G Technology Roadmap - Hosted by 4G Americas
                                             Relays
      Type I (in band)
                                                          Time division multiplex at relay   C1 time 1
                                                                                             C1 time 2
                                                                                             C1 or C2
                    Donor eNB                       Relay node

           Type Ia (out-of-band providing RF isolation)
                   (out of band                                                               C1
                                                                                              C2
                                                                                              C1, C2 or C3

                     Donor eNB                            Relay node

           Type Ib (in band, RF isolation)                    RF isolation at relay
                                                                                              C1
                                                                                              C1 or C2

                     Donor eNB                            Relay d
                                                          R l node



Relays can provide backhaul solution where dedicated backhaul is challenging



 13 | August 2010
                                  4G Technology Roadmap - Hosted by 4G Americas
                     Self Optimizing Network (SON)
          Innovations to continue through LTE-Advanced
                 Release 8                                Release 9                     Release 10 & Beyond
                                                       Load
     Self-        Neighbor Cell       Interference                    Handover &        Coverage &              E2E &
                                                     Balancing
Configuration/     Relation &        Co-Ordination                       RACH            Capacity              HetNet
 Plug & Play       auto Cell ID                       Energy          Optimization     Optimization          Optimization
                                          (    )
                                          (ICIC)
                                                      Savings



Plug & play                   Automated                    Inter-Cell Interference
   femto                     neighbor cell                 Cancellation based on inter-cell
                               relation                    negotiation
                                                                         • Reduces Hand Over failure
                                                                         • Improves throughput/QoE
                                                                         • Performance increase in call set up




         Comprehensive SON solution,
       powered by our 3G experience and
              Bell Labs Research                                           Bell Labs efforts injected into
                                                                            our wireless developments


                                  4G Technology Roadmap - Hosted by 4G Americas
                                       Summary


• Fast growing wireless data capacity demands due to smartphones and high
  growth in web, streaming and interactive video apps
• LTE & LTE-Advanced coupled with small cells & relays will address these fast
  growing wireless data capacity demands
• Carrier Aggregation and MU-MIMO enhancements are the key LTE-Advanced
  features for meeting IMT-Advanced requirements
  – CoMP has potential to provide significant further spectral efficiency gain with added
    complexity
  – Relays and continued SON evolution to support E2E and HetNet optimizations are additional
    LTE-Advanced features
• Alcatel-Lucent is delivering market leading end-to-end LTE solution with
  smooth evolution to LTE-Advanced, paving the way to new business models



                            4G Technology Roadmap - Hosted by 4G Americas

								
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