Are You Ready for DOCSIS 3.1

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  • Are You Ready for DOCSIS 3.1

    Presenter: Tony HolmesVeEX Field Applications Engineer

  • CONFIDENTIAL 3.1 | Bootcamp 2

    DOCSIS 3.1 Introduction DOCSIS 3.1 Basics Using the Tools Migration Plans

    Technical Session Overview

  • DOCSIS 3.1 Introduction

    Confidential & Proprietary Information of VeEX Inc. 3Presentation Name Here

  • Traffic growth is driven by demand and competition

    The DOCSIS 3.1 spec will greatly increase the bandwidth performance of the HFC plant using OFDM PHY & LDPC FEC

    10+ Gbps Downstream & 1+ Gbps Upstream will permit DOCSIS to satisfy subscriber BW needs well in to the future

    DOCSIS scales very well. Efficient spectrum utilization Node splits Adding BW (DS & US) Mid-split/High-Split architecture DOCSIS Enhancements (higher modulations, new

    PHY/FEC, etc.)

    Why DOCSIS 3.1?

    4

  • Higher orders of modulation (HOM)

    Elimination/ Reduction of RF guard band

    Greater capacity achieved primarily through LDPC (HOM in clean channel) and OFDM (elimination of guard bands and HOM in impaired channels)

    Close to 2X improvements over DOCSIS 3.0

    More Capacity needed?

    5

  • DOCSIS 3.1 delivers more throughput in existing spectrum Capitalizes on the new LDPC FEC & OFDM PHY technologies

    Permits higher modulation orders (QAM 1024, 4096 & etc.)

    Eliminates 6MHz & 8MHz channelization (N.A & Europe can unify)

    Upstream operation up to at least 200MHz

    Downstream operation to at least 1.2GHz

    Will use bit-loading to adjust to the HFC plant

    DOCSIS 3.1 Delivers More Throughput

    6

  • DOCSIS 3.1 Basics

    3.1 | Bootcamp 7

  • Example of Spectrum Options

    3.1 | Bootcamp 8

    Downstream Spectrum Options 1. Initially use 750/862/1002 MHz Plants (> 6 Gbps) 2. Next up to 1.2 GHz with amp upgrade (> 7Gbps +) 3. Long-term to 1.7 GHz with tap upgrade (> 10Gbps +)

    Upstream Spectrum Options 1. Use the current sub-split 42/65 MHz (> 200 Mbps) 2. mid-split 85 MHz (> 400 Mbps) 3. high-split 230 MHz (> 1Gbps)

    CONFIDENTIAL

  • Orthogonal Frequency Division Multiplexing = large collection of very narrow QAM sub-carriers

    Sub-carriers are grouped into OFDM blocks which are processed by FFT

    OFDM

    3.1 | Bootcamp 9CONFIDENTIAL

  • No wasted Capacity

    CONFIDENTIAL 3.1 | Bootcamp 10

  • OFDM sub-carriers can be packed tightly without interfering with each other

    OFDM sub-carriers fall off faster at the band edges

    OFDM Concept

    CONFIDENTIAL 3.1 | Bootcamp 11

  • FEC = Forward Error Correction

    LDPC = Low Density Parity Check Invented by Robert Gallager in 1962 Could not be implemented in HW until recently Much more robust than Reed-Solomon

    LDPC FEC

    3.1 | Bootcamp 12CONFIDENTIAL

  • HFC Plant has at least 8 dB variation in CNR across plant

    Multiple profiles allow operators to leverage SNR variation to improve system capacity

    Example with 4 profiles A. Worst (mostly QAM256) B. Average (mostly QAM1K) C. Better (mostly QAM2K) D. Best (mostly QAM4K)

    Downstream Profiles QAM4K Anyone?

    3.1 | Bootcamp 13CONFIDENTIAL

  • OFDM/3.1 gives more Bits/Hz at the same CNR & operating conditions than 3.0

    OFDM - More for less

    CONFIDENTIAL 3.1 | Bootcamp 14

    6.3 6.38.6

    10.5

    Bits/Hz

    CNR35 dB 41 dB

    35% Efficiency gain 3.1 vs. 3.06.3 Max Bits/Hz on 3.010.5 Max Bits/Hz on 3.1 w/ QAM 40968.5 Typical Bits/Hz on 3.1 w/mixed QAM (256~4096)

  • PLC: (Physical Link Channel) all necessary information to decode and use the OFDM Signal your passport

    NCP: (Next Codeword Pointer) provides the modems with which Code Words (CW) are present and on each profile which CW to use

    Profile A: used for Boot Profile - No profile A no 3.1. All 3.1 modems will use Profile A

    OFDM: Information about the overall OFDM channel AvgPower, MER, and Noise

    Profiles B, C and D: Provide higher modulations for greater efficiency

    Building Blocks in Details

    CONFIDENTIAL 3.1 | Bootcamp 15

  • OFDM Overall Level, MER, ICFR, Echo

    PLC (Physical Link Channel) Level, MER, CWE and UCWE

    NCP (Next Codeword Pointer) Level, MER, CWE, and UCWE

    Profiles A, B, C, D MER, CWE, and UCWE

    OFDM Measurements

    CONFIDENTIAL 3.1 | Bootcamp 16

  • PLC needs to be locked

    U CWE (Uncorrectable CWE): 0

    MER > 15 dB (QAM16 OFDM)

    Level > -15 dBmV

    C CWE (Correctable CWE): Should be 0 but as long as they are corrected, it is okay

    Test 1: PLC (Phy Link Channel)

    CONFIDENTIAL 3.1 | Bootcamp 17

    PLC

  • NCP needs to be locked

    U CWE (Uncorrectable CWE): 0

    MER > 15 dB (QAM16 OFDM)

    Level > -15 dBmV

    C CWE (Correctable CWE): Should be 0 but as long as they are corrected, it is okay

    Test 2: NCP (Next Codeword Pointer)

    CONFIDENTIAL 3.1 | Bootcamp 18

    NCP

    CW start at low end and populate up

    NCP start at high end and populate down

    NCP lives here

  • Profile A needs to be locked

    U CWE (Uncorrectable CWE): 0

    MER > 27 dB (please note average MER)

    C CWE (Correctable CWE): Should be 0 but as long as they are corrected, it is okay

    IMPORTANT: If Profile A has not achieved locked or gets U CWE, modems will roll back to 3.0 > Look for Profile A performances if modem only locks in 3.0 mode

    Test 3: Profile A

    CONFIDENTIAL 3.1 | Bootcamp 19

    Profile A

  • Average Level > -6 dBmV

    ICFR < 2 dB Peak to Peak

    MER Average > 36 dB

    MER Standard Deviation < 2 dB

    MER @ 2nd Percentile > 35 dB

    Test 4: OFDM Overall

    CONFIDENTIAL 3.1 | Bootcamp 20

    OFDM

    Modulation Min CNR/MER Mini Avg Power

    QAM4096 41 dB -6 dBmV

    QAM2048 37 dB -9 dBmV

    QAM1024 34 dB -12 dBmV

    QAM256 27 dB -15 dBmV

    QAM16 15 dB -15 dBmV

  • Profile needs to be locked

    U CWE (Uncorrectable CWE) and CWE (Correctable CWE): varies

    MER see table per profile

    Test 5: Profiles B, C, D

    CONFIDENTIAL 3.1 | Bootcamp 21

    Modulation Min CNR/MER Mini Avg Power

    QAM4096 41 dB -6 dBmV

    QAM2048 37 dB -9 dBmV

    QAM1024 34 dB -12 dBmV

    QAM256 27 dB -15 dBmV

    QAM16 15 dB -15 dBmV

    Profile B, C, D, ....

  • Lock onto primary

    Verify Bonding of SC QAM and OFDM on the Forward

    Verify Bonding on the Return

    Verify Average Power

    Verify Upstream TX

    Service Level Testing

    CONFIDENTIAL 3.1 | Bootcamp 22

  • Perform OFDM verification

    Service Level Testing

    CONFIDENTIAL 3.1 | Bootcamp 23

    Check bonded channels for any errors

  • PING for connectivity

    VeTEST for Throughput testing both at RF port or Ethernet Port

    PING and VeTEST

    CONFIDENTIAL 3.1 | Bootcamp 24

  • Using Spectrum to find Noise under OFDM

    CONFIDENTIAL 3.1 | Bootcamp 25

    OFDM 96 MHzRunning clean

    Noise Detected @ NCPWill cause modems to switch to 3.0

  • Example of Migration Plan

    3.1 | Bootcamp 26

  • Backward Compatibility Support at least 24 bonded SC-QAM in downstream and 8 in upstream S-CDMA in the upstream DOCSIS 3.1 CM required to operate on DOCSIS 3.0 CMTS DOCSIS 3.1 CMTS required to support DOCSIS 3.0 (and 2.0) CM

    Operation on existing HFC Networks Upstream spectrum remains below downstream Supports operation with existing upstream splits, 42/65MHz as in most operation, 85MHz

    as specified in DOCSIS 3.0 Support spectrum evolution 200 MHz on upstream 1.2/1.7 GHz on downstream Support the ability to take advantages of enhanced capabilities when Network, Headend

    and CPE permit

    D3.1 Technology Migration

    CONFIDENTIAL 3.1 | Bootcamp 27

  • Current State: DOCSIS 3.0 CMTS or CCAP and 3.0 CM growth

    28

    54/85 MHz

    750MHz

    5MHz

    42/65MHz

    Downstream

    860MHz

    1,000

    MHz

    20MHz

    1-4 LD Channels

    1-24/32 LD Channels

    . . . . . .

    D3.0 CM(NxM LD)

    D2.0 CM(1x1 LD)

    D2.0 CM(1x1 LD)

    D1.0/1.1 CM

    (1x1 LD)

    D1.0/1.1 CM

    (1x1 LD)

    May have 1.0/1.1 LD CMs (need 3.2 MHz 16-QAM channel) More 3.0 LD CMs and GWs More LD US and DS carriers and channel bonding

    D3.0 CM(NxM LD)

    Operating ModeLegacy DOCSIS LDDOCSIS 3.1 3.1

    CCAP or CMTS

    DOCSIS 3.0 (LD)

    Upstream

    LegacyOOB DS

    Legacy OOB US

    Out-of-BandMotorolaCisco

    3.1 | BootcampCONFIDENTIAL

  • 54/85 MHz

    750MHz

    5MHz

    42/65MHz

    Downstream

    When 3.1 available: Begin deploying 3.1 CPEs in LD mode

    29

    860MHz

    1,000

    MHz

    20MHz

    1-4 LD Channels

    1-24/32 LD Channels

    . . . . . .

    D3.0 CM(NxM LD)

    D2.0 CM(1x1 LD)

    D2.0 CM(1x1 LD)

    D1.0/1.1 CM

    (1x1 LD)

    D1.0/1.1 CM

    (1x1 LD)

    May remove 1.0/1.1 LD CMs Lots of 3.0 LD CMs and GWs More LD US and DS carriers May deploy S-CDMA Begin deploying 3.1 CMs

    D3.0 CM(NxM LD)

    Operating ModeLegacy DOCSIS LDDOCSIS 3.1 3.1

    CCAP or CMTS

    DOCSIS 3.0 (LD)

    Upstream

    LegacyOOB DS

    Legacy OOB US

    Out-of-BandMotorolaCisco

    D3.1 CM(NxM LD)

    D3.1 CM(NxM LD)

    3.1 | BootcampCONFIDENTIAL

  • Future: Deploy 3.1 DS & US in Existing Split

    30

    D3.1 CM(NxM LD +

    3.1)

    D3.1 CM(NxM LD +

    3.1)

    D2.0 CM(1x1 LD)

    D2.0 CM(1x1 LD)

    D3.0 CM(NxM LD)

    D3.0 CM(NxM LD)

    Removed 1.0/1.1 LD CMs; no need for TDMA LD US channels Begin deploying 3.1 CCAP: new blade or firmware update to 3.1 DS and US blade

    For MHA architecture, new EQAMs might be firmware upgradeable to 3.1 DS blades Begin using OFDMA for 3.1 US and/or OFDM for 3.1 DS (dont have to deploy together)

    Overlay 3.1 on current US spectrum with LD US, filling gaps and using logical channels Use open spectrum for 3.1 DS OFDM channels in existing DS spectrum

    Operating ModeLegacy DOCSIS LDDOCSIS 3.1 3.1

    Out-of-BandMotorolaCisco

    CCAPDOCSIS 3.1

    54/85 MHz

    750MHz

    5MHz

    42/65MHz

    Downstream

    860MHz

    1,000

    MHz

    20MHz

    1-4 LD Channels

    1-24/32 LD Channels

    . . . . . .

    Upstream

    LegacyOOB DS

    Legacy OOB US

    OFDMA 3.1 OFDM 3.1 OFDM 3.1

    3.1 | BootcampCONFIDENTIAL

  • Long Term: 3.1 CCAP w/more DS and/or US capacity

    31

    3.X CCAPDOCSIS 3.X

    D2.0 CM(1x1 LD)

    D2.0 CM(1x1 LD)

    D3.0 CM(NxM LD)

    D3.0 CM(NxM LD)

    100-240 MHz

    750MHz

    5MHz

    85-200MHz

    DownstreamUpstream

    20MHz

    TBD

    OFDM 3.1

    Expand 3.1 US and/or DS capacity as feasible and required Move OOB carriers; assess impact on existing STBs above 54 MHz Use OFDM and OFDMA more extensively Only use OFDM in new spectrum

    . . . . . .

    1-24/32 LD Channels

    Operating ModeLegacy DOCSIS LDDOCSIS 3.1 3.1

    D3.1 CM(NxM LD +

    3.1)

    D3.1 CM(NxM LD +

    3.1)

    1-8 LD Channels

    OFDM 3.1

    860MHz

    1,000

    MHz

    1,200

    MHz

    OFDM 3.1

    LegacyOOB DS

    Legacy OOB US

    Out-of-BandMotorolaCisco

    OFDMA 3.1

    3.1 | BootcampCONFIDENTIAL

  • Questions???

    Tony HolmesTel: (317) 366-8692tholmes@veexinc.comwww.veexinc.com

    32

    Are You Ready for DOCSIS 3.1Technical Session OverviewDOCSIS 3.1 IntroductionWhy DOCSIS 3.1?More Capacity needed?DOCSIS 3.1 Delivers More ThroughputDOCSIS 3.1 BasicsExample of Spectrum OptionsOFDMNo wasted CapacityOFDM ConceptLDPC FECDownstream Profiles QAM4K Anyone?OFDM - More for lessBuilding Blocks in DetailsOFDM MeasurementsTest 1: PLC (Phy Link Channel)Test 2: NCP (Next Codeword Pointer)Test 3: Profile ATest 4: OFDM OverallTest 5: Profiles B, C, DService Level TestingService Level TestingPING and VeTESTUsing Spectrum to find Noise under OFDMExample of Migration PlanD3.1 Technology MigrationCurrent State: DOCSIS 3.0 CMTS or CCAP and 3.0 CM growthWhen 3.1 available: Begin deploying 3.1 CPEs in LD modeFuture: Deploy 3.1 DS & US in Existing SplitLong Term: 3.1 CCAP w/more DS and/or US capacityQuestions???Tony HolmesTel: (317) 366-8692tholmes@veexinc.comwww.veexinc.com

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