DOCSIS 3.0 DS Planning & Bandwidth Management John Downey, Consulting Network Engineer – CMTS BU

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Objectives Terms M-CMTS  Adapters and connectivity, linecards, timing servers, e-qams,.. I-CMTS Optional Architectures Frequency Stacking Levels Frequency Placement Isolation Concerns

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 3 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Why it’s Needed  Competitive pressure, offering higher tiers of service, more customers signing up Frequency Stacking Levels & Placement  What is the e-qam max output with four channels stacked  Do channels have to be contiguous? Isolation Concerns  Applications w/ different service grps lead to overlaid networks  Signals destined for one node could “bleed” over to another DS Frequency Expansion to 1 GHz  Amplifier upgrades are occurring now. It’s best to make the truck roll once, so think about diplex filters, spacing, taps, etc.

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 4 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Allow more BW for DOCSIS 1.x & 2.0 CMs Limit/reduce more node splits Introduce new HSD service of 50 to 100 Mbps Allow migration of existing customers to higher tier and DOCSIS 3.0 capability  Better Stat Muxing

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Local DS = CMTS DS Remote DS = E-QAM DS Primary = DOCSIS messaging Secondary = Bonding “Wideband” generically used to describe D3.0 DS bonding Channel Grouping Domain (CGD) is MxN mac domain  Mac Domain = 1 DS & N USs Service group = CMTS Fiber Node config M-CMTS is an architecture, not necessarily D3.0  Provides DS load balance within MxN domain I-CMTS allows MxN and bonding within linecard D3.0 CM supports minimum of 4 US and 4 DS chs CMs on market are 4x4 (TI-based) & 8x4 (Brcm-based)

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Uses M-CMTS compliant Edge-QAM  Cisco RFGW-1D and RFGW-10  Harmonic NSG-9000 Increase legacy DS port density of uBR10K Uses DTI timing source for DS channels Enables legacy DOCSIS [1.x/2.0] CMs to use external QAMs for operation  Allows MxN mac domains Eliminates need for PC from 5x20 card Allows bonding on all channels in a BG  Hits the 100 Mbps BW mark on a 3-channel CM

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 7 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 8 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC CMTS Cable linecard US ports needed and host DS bonding adapter 1 Gbps fiber or copper ports DTI timing card DTI Server (Symetricom) M-CMTS compliant EQAM Cisco RFGW-1D or RFGW-10 Harmonic NSG9000 Arris WCM300 (Linksys BroadLogic) SA 3-Ch DPC 2505 (BCM 3381) Cisco/SA DPC x4 TI Cisco/SA DPC x4 Brcm

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 9 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC CM SA DPC 3000 MC5x20H CPU/RP Jacket Card uBR10K CMTS D3.0 DS + Primary NB DS WB DS SPA WB DS SPA Backhauls SA DPC-2505 Primary Ch D3.0 BG Primary DTI Card DTI Server M-CMTS EQAM

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Any rules-of-thumb to estimate service group size? What recommendations are there for HE combining/splitting to avoid intrusive changes later? Any impairments in HE or plant that will affect DOCSIS 3.0 more compared to earlier versions?  Isolation  Off-air Ingress  Attenuation  Freq assignments, spectrum allocation, plant limits If small amount of extra BW needed, is it possible to split 4 chs from DS port to use 2 chs in one SG and other 2 in another SG?

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 11 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC DS frequencies 1 I-DS 4 M-DS (5 Primary)  2 US frequencies 2 channel bonding

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 12 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC , 5x4 MAC domains with ATDMA & TDMA USs E-qam overlaid for 2 nodes 70/2 = 35 connectors 3 e-qam chassis with 6 modules each 4 freqs * 35 = 140 QAMs = 6 SPAs = Spumoni & PRE4 5 DS freqs 2 US freqs 16-QAM 64-QAM 3.2 MHz 6.4 MHz Local Bonding Remote Primary Local Primary Remote Bonding

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 13 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC  4 DS frequencies (4 I-DS)  2 US frequencies 2 channel bonding

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 14 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC , 4x4 MAC domains with ATDMA & TDMA USs DS connector overlaid for 2 nodes, 35 connectors*2 = 70 nodes 4 freqs * 35 = 140 QAMs = PRE4 4 DS freqs 2 US freqs 16-QAM 64-QAM 3.2 MHz 6.4 MHz Local Primary Local Bonding

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 15 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Pros  Four bonding freqs / e-qam connector  Only 1 e-qam connector per 8 nodes  Basic = 2 DS/2 nodes with DCC support  US load balance of 2.0 CMs  One US connector shared across 2 nodes for diminishing D1.x CMs Cons  Requires M-CMTS architecture  Requires five DS & three US freqs  Must push 3.0 CMs to remote DS  Bonding group must be same IP bundle  CM ranging overlap with “real” data? 3.2 MHz 6.4 MHz Remote DSs Local DSs 5 DS freqs 3 US freqs 2x5 domain

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 16 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Pros  8 bonding freqs per 2 connectors  Only 5 connectors per 8 nodes Can provide 8 ch DS bonding  US load balance of 2.0 CMs  One US connector shared across 2 nodes for diminishing D1.x CMs Cons Requires 8 DS & 3 US freqs 3.2 MHz 6.4 MHz Local DSs 8 DS freqs 3 US freqs 5x5 domain

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 17 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 18 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Pros  Four bonding freqs / e-qam connector  One e-qam connector per 2 nodes  Basic = 5 DS/2 nodes with DCC support  US load balance of 2.0 CMs  One US connector shared across 2 nodes for diminishing D1.x CMs Cons  Requires M-CMTS architecture  Requires five DS & three US freqs  Must push 3.0 CMs to remote DS  Four e-qam connectors and 16 e-qam chs per 8 nodes 3.2 MHz 6.4 MHz Remote DSs Local DSs 5 DS freqs 3 US freqs 5x5 domain

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 19 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Frequency assignments  CMTS may be limited to 860 MHz or 1 GHz  Legacy CMs (1.x & 2.0) limited to 860 MHz bandedge  E-qam limited to contiguous 24 MHz or 4 channel slots Annex A may only be 3 chs vs 4 for annex B  CMs may be limited to 50 or 60 MHz passband M-CMTS architecture requires DTI and local USs  Distance limitation, time offset differences, level differences Resiliency is another topic to address  If one DS frequency goes bad in the field, how will CMs recover or react?

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 20 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC E-qam licensing? CM requires 1.1 config file More DS = more US Testing and maintaining multiple DS channels  Physical chs have not changed for DOCSIS 3.0  Test equip with built-in CMs need to support bonding DS ch bonding max power with 4 freqs stacked  Four chs stacked on 1 connector limited to 52 dBmV/ch DOCSIS 1.x/2.0 DS is 61 dBmV max output DS isolation issues

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 21 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC DS Combiner DS Splitter Requires: 5 DS freqs 3 US freqs in each node DSs 0-3 = 603 MHz E-QAM = 609, 615, 621, & 627 MHz DS Tx Potential Isolation Path DS0 U0 U1 U2 U3 1x4 DS1 U0 U1 U2 U3 1x4 DS2 U0 U1 U2 U3 1x4 DS3 U0 U1 U2 U3 1x4 Edge-QAM 61? 52? Isolation amp

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 22 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Can this device handle 50 dBmV inputs? W

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 23 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC D3.0 spec goes to 1 GHz, some equipment may not  SA DPC2505 speced to 930 MHz DPC2505, 3 ch CM needs all 3 DSs for 111 Mbps  Can do annex B &/or A; but requires more spectrum D3.0 CM spec requires 60 MHz capture window DPC3000 capture of 96 MHz over most spectrum  82 MHz max window supported over entire spectrum TI 4x4 CM (60 MHz window) Brcm 8x4 CM (2, 32 MHz bands or 1, 96 MHz band)  DS freqs must be contiguous within tuner block unlike 4x4 CMs  Can use RCC templates to setup both tuners  New feature called Split Tuner will analyze RCC & create 2 Rx modules and move tuners automatically without RCC templates

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 24 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Restrict legacy eMTAs to Local DS Enforce legacy CMs to only register on Primary-only DS Enforce legacy CMs to move to specific DS freq Force 3.0-capable CMs to initialize on bonding capable primary DS Can specify UCDs sent for each DS Put voice call service flows on a primary DS  cable docsis30-voice downstream req-attr-mask 0 forb-attr-mask  EDCS explains this feature

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 25 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC x4 domain appears as 2, 1x2 domains DS0 U0 U1 U2 U3 1x4 Edge-QAM

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 26 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Cost effective and faster time to market  Decrease DS costs – deploy D3.0 later with no additional CMTS investment! Targeted insertion of D3.0  Leverage existing US chs while adding more DS capacity  Load balance 1.x/2.0 and enable D3.0 when needed  Minimizes capex & opex Leverage D3.0 bonding for D2.0 tiers & services  Better stat-mux efficiency & improved consumer experience

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 27 © 2010 Cisco Systems, Inc. All rights reserved. Cisco ConfidentialC Long term D3.0 service planning  Insure optimized frequency allocation Enable seamless upgrade to higher D3.0 tiers  Wire once & add QAM chs as tiers or service take-rates go up End-to-end solution minimizes risk  CMTS, QAM, and CPE Can also disable DS bonding  No cable mrc-mode  Per-CM exclude with vendor specific MIB or TLV