DOCSIS 3 0 Overview SCTE Presentation John J

Скачать презентацию DOCSIS 3 0 Overview SCTE Presentation John J

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Agenda § Motivation - Why DOCSIS 3. 0? § DOCSIS 3. 0 Features Overview § DOCSIS 3. 0 and M-CMTS Comparisons § Bandwidth Management § Migration Strategy § DOCSIS 3. 0 Status § Potential Issues § Summary § Case Studies/ Architecture Ideas Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 2

Growing Services Consuming HFC Spectrum § More HD Video Services – Growth plans to 100+ HD channels § More SD Video Content – Expansion to nx 100 SD chs to compete w/ satellite § Personalized Video Services – Migration from Broadcast to Unicast services – Vo. D, Startover, My. Primetime, etc § Broadband Internet Services Growth – Migration from Web to Web 2. 0, Video Streaming and P 2 PTV Applications – Increased per home BW consumption – Expansion of the peak hour to whole evening § Competitive pressure! Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 4

Spectral Solutions Being Investigated & Deployed § Use every channel available § SDV § Narrowcast QAM injection § Node splits § Analog reclamation § 1 GHz upgrade § Traffic “grooming” § MPEG-4 Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 5

Overall Industry Objectives DOCSIS 3. 0 § Goal: – More aggregate speed – More per-CM speed – Enable New Services § Components: – – Channel Bonding IPv 6 Multicast AES M-CMTS § Goal: – Increase Scalability – Reduce Cost § Components: – Low Cost E-QAM – CMTS Core Processing • Better stat muxing with bigger “pipe” • Offer >37 Mbps for single CM Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 6

DOCSIS 3. 0 Features • MAC Layer • Network Management – Downstream Channel Bonding – Upstream Channel Bonding • Network Layer – IPv 6 support – IP Multicast (IGMPv 3/MLDv 2, SSM, Qo. S) • Security – Certificate Revocation Management – Runtime SW / Config validation – Enhanced Traffic Encryption (AES) – Certificate Convergence – Early Authentication & Encryption – TFTP Proxy Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential – Diagnostic Log (Flaplist) – Extension of Internet Protocol Data Records (IPDR) usage – Capacity management – Enhanced signal quality monitoring • Physical Layer – Switch-able 5 -42 MHz, 5 -65 MHz, or 5 -85 MHz US band – S-CDMA active code selection with new Logical channel • Commercial Services – T 1/E 1 Circuit Emulation support 8

Channel Bonding § In a nutshell, channel bonding means data is transmitted to or from CMs using multiple individual RF channels instead of just one channel § Channels aren't physically bonded into a gigantic digitally modulated signal; bonding is logical With DOCSIS 1. x & 2. 0, data is transmitted to modems using one channel Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential With DOCSIS 3. 0, data is transmitted to modems using multiple channels 9

DOCSIS 3. 0 Registration Diagram SYNC, UCD, MAP messages WCM acquires QAM/FEC lock of DOCSIS DS channel MDD message WCM performs usual US channel selection, but does not start initial ranging B-INIT-RNG-REQ message WCM performs bonded service group selection, and indicates via initial ranging Usual DOCSIS initial ranging sequence DHCP DISCOVER packet DHCP OFFER packet DHCP REQUEST packet DHCP RESPONSE packet TOD Request/Response messages TFTP Request/Response messages REG-REQ message REG-RSP message REG-ACK message WCM transitions to ranging station maintenance as usual WCM provides Rx-Chan(s)-Prof WCM receives Rx-Chan(s)-Config WCM confirms all Rx Channels Usual BPI init. If configured Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 10

Downstream Bonding - Features § Packet bonding of a minimum of 4 channels – Delivers in excess of 150 Mbps § Non-disruptive technology – Seamless migration from DOCSIS 1. x/2. 0 – M-CMTS and high density I-CMTS cards – EQAMs § New hardware required for scalability and cost reduction § New CM silicon required Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 12

Downstream Bonding Service Drivers § Competition against FTTH – Deliver 100 Mbps § High BW residential data § IP Video over DOCSIS(VDOC) – High definition Video to multiple devices • PCs, hybrid STBs, portable devices – High BW Internet streaming § Video conferencing – Tele. Presence § Commercial service – High BW data services – Bonded T 1 – High BW Ethernet/L 2 VPN service Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 13

Reasons to Develop DRFI Beyond D 2. 0 RFI § Required to specify a multi-channel environment – DOCSIS 2. 0 and lower was only single carrier § Cleaned up inaccuracies in 2. 0 and lower § Basic idea was no need for external combiner, laser loading concerns and cost reduction? § Criteria was 60 d. B CNR assuming a worse case lineup § Applies only to 3. 0 CMTS or any multi-carrier DS connector (e-qam) Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 14

Single Carrier DRFI • • • Annex A & B Variable Depth Interleaver HRC, IRC, STD 64 & 256 QAM Inband Spurious, Distortion and Noise MER Unequalized MER >35 d. B, Equalized MER >43 d. B • Inband Spurious and Noise ≤-48 d. Bc d. Bm. V Spurious and noise within ± 50 k. Hz of the carrier is excluded. • Phase Noise (single carrier) 1 k. Hz - 10 k. Hz: -33 d. Bc double sided noise power 10 k. Hz - 50 k. Hz: -51 d. Bc double sided noise power 50 k. Hz - 3 MHz: -51 d. Bc double sided noise power N=1 : 60 • Output Return Loss 1 >14 d. B within an active output channel from 88 MHz to 750 MHz >13 d. B within an active output channel from 750 MHz to 870 MHz >12 d. B in every inactive channel from 54 MHz to 870 MHz >10 d. B in every inactive channel from 870 MHz to 1002 MHz • Power per channel +/- 2 d. B • Diagnostic Carrier Suppression ≥ 50 d. B Center Frequency MUST 91 <-> 867 MHz MAY 57 <-> 999 MHz Channel BW 6 MHz & 8 MHz Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. • MUST be F Connector. • DRFI compliance testing conducted at room temp Cisco Confidential 15

Power Output for Multiple Carriers per RF Spigot N d. Bm. V 1 60 2 56 3 54 4 52 8 49 16 45 32 42 N=n : 60 -ceil[3. 6*log 2(n)] d. Bm. V N=1 : 60 N=2 : 56 N=3 : 54 N=4 : 52 Presentation_ID 1 1 2 © 2006 Cisco Systems, Inc. All rights reserved. 1 2 3 Cisco Confidential 1 2 3 4 16

Upstream Bonding - Features § Packet Striping of a minimum of 4 channels – Delivers in excess of 50 Mbps § AES and scalability require hardware upgrade § New CM silicon required § Phased and seamless technology migration Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 18

Upstream Bonding Service Drivers § Competition against FTTH – Deliver 20+ Mbps § High BW residential data § User generated content – Video and photo uploads – Proliferation of social sites § Video conferencing – Tele. Presence § Commercial service – High BW symmetrical data services – Bonded T 1 – High BW Ethernet/L 2 VPN service Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 20

D 2. 0 is Still not Used § 27. 2 Mbps total aggregate speed § Achieved 18 Mbps for single CM on US – Fragmentation and concatenation with a huge max burst § Linerate possible of ~ 27 Mbps § Make sure 1. 0 CMs, which can’t fragment, have a max burst < 2000 B Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 21

DOCSIS 1. 1 Phy Change (PRE-EQ) § US EQ is supported on all cards for 1. 0 & 1. 1 – 8 -tap blind equalizer § 1. 1 allows 'pre-eq' where EQ coefficients are sent during IM & SM allowing CM to pre-distort its signal § Supported on all linecards & IOS that support 1. 1 – Requires 1. 1 capable CMs, but not. cm file – Configurable option § 2. 0 increases the EQ tap length from 8 to 24 – Supported on U/H cards in ATDMA & mixed mode – Off by default Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 22

Upstream Adaptive Equalization Example Upstream 6. 4 MHz bandwidth 64 -QAM signal Before adaptive equalization: Substantial in-channel tilt caused correctable FEC errors to increment at a rate of about 7000 errored codewords per second (232 bytes per codeword). The CMTS’s reported upstream MER (SNR) was 23 d. B. After adaptive equalization: DOCSIS 2. 0’s 24 -tap adaptive equalization —actually pre-equalization in the modem —was able to compensate for nearly all of the in-channel tilt (with no change in digital channel power). The result: No correctable or uncorrectable FEC errors and the CMTS’s reported upstream MER (SNR) increased to ~36 d. B. Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 23

DOCSIS 3. 0 Migration: M-CMTS Current CMTS DOCSIS 2. 0 US HFC DS Bonding and Existing DOCSIS 1. x/2. 0 CMs Edge QAMs Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 25

M-CMTS • • Presentation_ID Key DOCSIS 3. 0 enabling technology DS scalability of DOCSIS 1. x/2. 0 Easy migration to DOCSIS 3. 0 DS channel bonding Enables service convergence and QAM sharing (Video and Data) • Creates efficiency in CAPEX/service © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 27

DOCSIS 3. 0: I-CMTS High Density Linecards I-CMTS DOCSIS 3. 0 Bonded US HFC DOCSIS 3. 0 Bonded DS Supports DS Bonding and Existing DOCSIS 1. x/2. 0 CMs Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 29

Bandwidth Management Solutions § SDV – Offer more HD and SD content using less total RF spectrum with the same STB – Only transmit the content being actively watched – Could make more QAMs available for DOCSIS and VOD if QAM sharing is implemented § Node splits – Physically reduce the homes passed per HFC node, thus reduce contention per home for Unicast services – Decombine more attractive – Triggers additional QAMs and CMTS Ports Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 32

Bandwidth Management Solutions (cont) § Traffic “Grooming” § MPEG-4 § Broadcast to narrowcast QAM injection – Reduce broadcast domains to smaller DOCSIS & video service groups – Ultimately a complete Unicast lineup on a per node basis § Analog reclamation for more digital spectrum – More QAM channels for Digital Broadcast, Vo. D, SDV and DOCSIS § Use every channel available – Manage the channel lineup, fill in the gaps, mitigate noise to enable all spectrum § 1 GHz upgrade – Make new spectrum for new CPE above 860 MHz Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 33

1 GHz Upgrade 1 GHz Bandwidth Enhancement & Segmentation • Network Impact • <= 750 MHz of BW may not be enough • Node splitting & SDV alone do not solve HFC BW problem • 1 GHz BW upgrade required • 1 GHz Network Benefits • Value added capacity • 60 analog 6 MHz chs gained • Minimal cost per home passed cost to implement • Electronic-only drop-ins in most cases Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 1 GHz is a cost-effective tool to increase broadcast and narrowcast BW 34

DOCSIS 3. 0 Migration Steps - Phased Approach for Improved Time-to-Market § Downstream Bonding § IPV 6 § Upstream Bonding § Multicast Qo. S § AES § IPDR Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 36

Initial Migration Goal § Deliver very high speed data service – Deliver 100+ Mbps DS – Deliver 50+ Mbps US § Reduction of node split cost – Multiple DSs per node • M-CMTS or I-CMTS load balancing – Multiple USs per node • Leverage existing ports and deploy 2. 0 USs § BW flexibility & reduction of CMTS port cost – Break DS/US dependence i. e. independent scalability of US and DS – Reduce cost of DS ports by more than 1/10 – Reduce CMTS port/subscriber cost by 30 -50% Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 37

Migration Strategy § Target CMTS upgrades in high priority markets – Fi. OS & U-Verse competitive markets – High growth & demographics – Markets with capacity issues – Your node § Add more DS QAMs per service group and load balancing – Via I-CMTS and M-CMTS – Current 1 x 4 mac domain leaves US stranded – Increase capacity to existing 1. x/2. 0 modem Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 38

Migration Strategy (cont) § Deliver targeted bonded DS chs to DOCSIS 3. 0 CMs § Video and data convergence – Video and DOCSIS service group alignment – DSG & Tru 2 way will leverage DOCSIS DS BW § Share & leverage existing assets – UEQAMs for Vo. D, SDV and DOCSIS – UERM to enable QAM sharing Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 39

DOCSIS 3. 0 Status § CMTS can be submitted for Bronze, Silver, or Full § Cablelabs – Qualified 3 CMTS vendors for Bronze for CW 56 – CW 58 currently underway and will conclude with results in early May 2008 § CMs are only allowed to go for "Full 3. 0 Certification" – No 3. 0 CMs have been certified by Cable. Labs § Only silicon that exists to build a FULL capable 3. 0 CPE is the Texas Instruments PUMA 5 chip – PUMA 5 is chip used in most vendor CMs going through Cable. Labs CW-58 testing Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 41

DOCSIS 3. 0 Status § Broadcom is working on a competing chip for 3. 0 CPE but it is not available yet § DPC 3000 in CW-58 certification for Full 3. 0 – Plan is to ship in volume by June 2008 § Operators – Working on models to determine QAM requirements – Testing pre and DOCSIS 3. 0 compliant DS Bonding – Testing IPV 6 in labs – Developing management tools and provisioning Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 42

Three Reference Designs § Broadcom's 3381 3 -ch/tuner – SA DPC 2505. . , – DPC 2100 locks only 6 MHz channels – EPC 2100 locks 8 MHz or 6 MHz channels § TI Puma 3 based – Linksys WCM 300 with 2 tuners, 6 & 50 MHz passband § TI Puma 5 3. 0 based – SA DPC 3000 w/ 4 -ch US & DS bonding, 60 MHz passband for annex B and 64 MHz for annex A Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 43

Design Rules and Restrictions § SA 3 ch CM needs all 3 DS on e-qam for 111 Mbps – Can do annex B on control channel & 2 annex A chs to get ~95 Mbps, but requires 6+8+8 MHz of BW § SA 4 ch CM has 96 MHz passband filter § Linksys CM has 2 tuners, 1 for control & 1 w/ 50 MHz band – Starts at lowest freq configured § D 3. 0 spec goes to 1050 MHz, but some equipment may not – SA DPC 2505 speced to 930 MHz § Can e-qam put out 2 or 4 “haystacks” per port? – What if it is annex A at 8 MHz ch width? Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 45

DS Ports with Edge-QAM for DS Bonding MC 5 x 20 1 x 8 DS 4 U 0/C 0 U 1/C 2 U 2/C 4 U 3/C 6 U 4/C 8 U 5/C 10 U 6/C 12 U 7/C 14 Presentation_ID 1 x 3 DSs 0 -3 = 603 MHz DS 4 = 609 MHz Edge 1 = 615 MHz Edge 2 = 621 MHz DS 0 U 0/C 0 U 1/C 2 U 2/C 16 Potential Isolation Path 1 x 3 DS 1 DS Combiner U 0/C 4 U 1/C 6 U 2/C 17 DS Splitter 1 x 3 DS 2 DS Tx U 0/C 8 U 1/C 10 U 2/C 18 Requires: • 4 DS freqs • 3 US freqs in each node 1 x 3 DS 3 U 0/C 12 U 1/C 14 U 2/C 19 © 2006 Cisco Systems, Inc. All rights reserved. Edge-QAM Cisco Confidential § How to deal with freq stacked DSs if not using them all? 46

Harmonic “dsync” Timing Adjustment Background § To support advanced DCC initialization techniques (2 and >), difference between CM timing offset on old ch and new ch need to be < ~ +/- 6 timing offset units § Harmonic EQAM introduces SYNC timestamp delay which needs to be manually adjusted on per QAM basis using “dsync” command Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 47

New Technology Cornerstones § DOCSIS 3. 0 - channel bonding for higher capacity – Enable faster HSD service – Mx. N mac domains now – Enable video over IP solutions § M-CMTS – Lower cost downstream PHY – De-couple DS and US ports § I-CMTS – Allows higher capacity in same box – Same wiring Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 49

$DOCSIS 3. 0/M-CMTS Concluding Remarks § Promises ten times BW at fraction of cost$ DOCSIS 3. 0/M-CMTS Concluding Remarks § Promises ten times BW at fraction of cost § Introduce new HSD service of 50 to 75 Mbps § Widespread deployment of DS Bonding in 2008 § Backward compatible with existing DOCSIS standards § Allows migration of existing customers to higher tier and DOCSIS 3. 0 capability § Allows more BW for legacy DOCSIS 2. 0 CM § Allows for a phased deployment § IPV 6, US bonding, and other features will follow Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential 50

Case Study 2 Load Balancing Group Upstream Frequencies Downstream Frequencies D 2 D 3 DF 4 D 4 Presentation_ID D 2 D 3 D 4 © 2006 Cisco Systems, Inc. All rights reserved. U 1 U 2 U 3 U 4 Fiber Node c FNc U 1 U 2 U 3 U 4 Fiber Node d FNd U 1 U 2 U 3 U 4 DF 5 UF 4 D 5 D 1 UF 3 Fiber Node e FNd DF 3 UF 2 Fiber Node b FNb D 1 DF 2 UF 1 Fiber Node a FNa DF 1 D 5 Cisco Confidential 53

Case Study 3 Bonding Group For DOCSIS 3. 0 Load Balancing Group For DOCSIS 2. 0 . Downstream Frequencies Upstream Frequencies DF 3 C 0 C 1 C 4 C 5 C 2 C 3 C 6 C 7 Fiber Node c FNc C 8 C 9 C 10 C 11 Fiber Node d FNd DF 4 UF 3 Fiber Node b FNb DF 2 UF 2 C 13 C 16 C 17 Fiber Node e FNd Requires 8*6 = 48 e-qam per 10 K DF 1 UF 1 C 14 C 15 C 18 C 19 DF 5 Fiber Node a FNa D 1 D 2 D 3 Requires 2*8 = 16 e-qam connectors from NSG 9000 D 4 DS 0 UF 4 D 5 DS 1 Only used for bonding on Node C DS 2 D 5 Blocks of 3 QAM 4 th QAM optional If 4 th qam enabled, can serve 6, 5 x 20 linecards (30 nodes) Presentation_ID D 1 D 2 D 3 © 2006 Cisco Systems, Inc. All rights reserved. DS 4 DS 3 D 4 D 5 Cisco Confidential 54

Case Study 4 Bonding Group For DOCSIS 3. 0 Load Balancing Group For DOCSIS 2. 0 Downstream Frequencies DF 1 DF 2 DF 3 DF 4 Upstream Frequencies UF 1 DF 5 UF 2 UF 3 UF 4 D 2 D 3 C 4 C 5 C 2 C 3 C 6 C 7 Fiber Node c FNc C 8 C 9 C 10 C 11 Fiber Node d FNd C 12 C 13 C 16 C 17 C 14 C 15 C 18 C 19 D 5 DS 0 Requires 2*8 = 16 e-qam connectors from NSG 9000 D 4 C 1 Fiber Node b FNb D 1 C 0 Fiber Node e FNd Requires 8*6 = 48 e-qam per 10 K Fiber Node a FNa DS 1 Low usage DS DS 2 D 5 Blocks of 3 QAM 4 th QAM optional If 4 th qam enabled, can serve 6, 5 x 20 linecards (30 nodes) D 1 D 2 D 3 © 2006 Cisco Systems, Inc. All rights reserved. DS 3 D 4 Presentation_ID DS 4 D 5 Cisco Confidential 55

Common Option • 4 DS freqs • 2 US freqs • 2 SPAs • 3 e-qam chassis • 5, 2 x 4 domains + 2 Frequency SPA DSs f 2 B WB f 1 609 P P 603 P P P P 5 x 20 DSs P 3. 2 MHz 31 6. 4 MHz 24 § Pros – – – TDMA ATDMA FN 1 FN 2 FN 3 FN 4 2 bonding freqs / e-qam connector Can offer 75 Mbps service Plenty of growth in e-qam chassis Spare slot can be used for N+1 or 3 G 40 Legacy = 2 DS/2 nodes & 2 US/1 node 68 nodes covered = ~ 7 linecards Presentation_ID © 2006 Cisco Systems, Inc. All rights reserved. Cisco Confidential FN 5 FN 6 § Cons FN 7 FN 8 FN 9 FN 10 – 41 e-qam connectors = 48 chs – Only 1 Primary freq / e-qam connector – Last DS on 7 th card has no extra primary ch 56