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Configuration Recommendations for DOCSIS IP Transport of IP Video

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Configuration Recommendations for DOCSIS IP Transport of IP Video CONFIGURATION RECOMMENDATIONS FOR DOCSIS TRANSPORT OF MANAGED IP VIDEO SERVICE WILLIAM T. HANKS With special thanks to the following contributors: Jim Allen, Tom Cloonan, Michael Dehm, Amit Eshet, J.R. Flesch, Dwain Frieh, Will Jennings, Tal Laufer, Tushar Mathur, Dan Torbet, John Ulm, Bill Ward, and Ian Wheelock TABLE OF CONTENTS INTRODUCTION ............................................................................................. 4 TARGET AUDIENCE ........................................................................................ 4 VENDOR AND PRODUCT AGNOSTICISM ........................................................ 4 TECHNOLOGY BACKGROUND ........................................................................ 5 Video ServicEs ................................................................................................................ 5 LinEar Broadcast TV vs. On-dEmand Content ............................................................ 5 Television ChannEl ViewErship ................................................................................... 5 TV ChannEl ChangE ExpEctations ............................................................................... 8 InternEt Protocol (IP) ...................................................................................................... 8 ConnEction-OriEnted vs. ConnEctionlEss ................................................................... 8 IP Multicast – One StrEam, MultiplE DEstinations ..................................................... 9 IP Unicast – One StrEam, Single DEstination .............................................................. 9 AdaptivE Bitrate Video ................................................................................................... 9 IP Unicast ABR Video .................................................................................................. 9 Multicast-assisted ABR Video ................................................................................... 10 HomE EquipmEnt Clarification ..................................................................................... 11 CablE ModEm ........................................................................................................... 12 HomE Gateway ......................................................................................................... 12 IP Video PlayEr ......................................................................................................... 12 Smart TV ................................................................................................................... 13 Console ..................................................................................................................... 13 TablEt & PCs ............................................................................................................. 13 IP Video Client w/multicast ...................................................................................... 13 Data ovEr CablE System InterfacE SpEcification ........................................................... 14 CablE ModEm CapabilitiEs ........................................................................................ 14 ChannEl and Flow Assignment ................................................................................. 15 ServicE Flow Types ................................................................................................... 17 MAC ManagEmEnt Dynamic ServicEs Transactions ................................................. 18 Quality of ServicE ..................................................................................................... 19 Copyright 2016 – ARRIS EntErprisEs LLC. All rights reserved. 2 Primary-CapablE DownstrEam ChannEls .................................................................. 21 UpstrEam Supervision .............................................................................................. 22 Energy ManagEmEnt ................................................................................................ 22 IP Multicast ............................................................................................................... 23 QoS Control PlanE Signaling ..................................................................................... 23 NACK-OriEnted ReliablE Multicast (NORM) ................................................................. 26 RECOMMENDATIONS - TYING IT ALL TOGETHER ......................................... 26 CM CapabilitiEs ............................................................................................................. 27 ChannEl Assignment to CMs ......................................................................................... 27 Consolidate Multicast Program StrEams .................................................................. 27 Load-BalancE RemaindEr of ChannEls ...................................................................... 30 CM Unicast IP Video ServicE Flow QoS ParamEters ..................................................... 30 DownstrEam ............................................................................................................. 31 UpstrEam .................................................................................................................. 32 QoS SEttings across DifferEnt ServicEs ..................................................................... 32 CONCLUSION ............................................................................................... 34 ABBREVIATIONS & DEFINITIONS ................................................................. 35 RELATED READINGS ..................................................................................... 38 REFERENCES ................................................................................................ 39 APPENDIX: SAMPLE IP VIDEO CONFIGURATIONS ........................................ 40 Minimum 32 DS ChannEl CMs/HGs for IP Video .......................................................... 41 Minimum 24 DS ChannEl CMs/HGs for IP Video .......................................................... 42 Minimum 16 DS ChannEl CMs/HGs for IP Video .......................................................... 42 Minimum 8 DS ChannEl CMs/HGs for IP Video ............................................................ 43 Copyright 2016 – ARRIS EntErprisEs LLC. All rights reserved. 3 INTRODUCTION The internEt protocol (IP) has beEn used to transport telEvision (TV) programing in some form for ovEr a dEcadE. The telco companiEs havE beEn using IP to commErcially distribute telEvision ovEr Digital Subscriber Line (DSL) technology for at lEast thE past fivE yEars. In order to do so, thE nEtwork and subscriber technologiEs havE beEn refined to provide a very accEptablE video service ovEr an IP transport nEtwork – gEnErally without rEgard to thE intricaciEs of thE accEss nEtwork in thE last milE to thE subscriber. Primarily due to thEir significant invEstmEnt in Motion PicturEs Expert Group (MPEG)- basEd video technology, cablE telEvision companiEs havE beEn much slower to adopt an IP video architecturE. HowEvEr, it seEms likE nEarly all of thEsE MultiplE System OpErators (MSOs) havE plans to “EvEntually” replacE MPEG transport technology with IP transport technology to provide a managEd video service for thEir subscriber basE. The prEdominant way to transport IP ovEr a cablE telEvision nEtwork is to use equipment that supports thE Data Over CablE System InterfacE SpEcification (DOCSIS). Unlike DSL, DOCSIS uses a sharEd medium but provides a rich set of tools to ensure Quality of ServicE (QoS) to Each subscriber. This papEr will addrEss some of thE issues in using DOCSIS to transport IP video. TARGET AUDIENCE This documEnt is intendEd to be rEad by people with a widE variEty of backgrounds and experience. WhilE some of thE audiEncE may havE a broad undErstanding of thE technologiEs, othErs may havE deEp experience with cErtain parts but havE littlE experience with othErs. Still othErs may be new to most of thEsE topics. The first sEvEral sEctions will try to provide everyonE with thE rEquisite information to undErstand thE rEcommEndations and thE rEasoning for thEm. If one or more of thE background sEctions arE alrEady undErstood by thE rEadEr, plEasE feEl frEE to skip to thE next sEction. VENDOR AND PRODUCT AGNOSTICISM The idEas and rEcommEndations expressed in this work arE believEd by thE authors to be applicablE on most products from most industry vendors. Some background assErtions may provE to be untruE on some products and some rEcommEndations may be unrEalizablE on some products. If issues arisE when attempting to tunE an IP video system, plEasE refer to product information and contacts from thE component equipment vendors. Copyright 2016 – ARRIS EntErprisEs LLC. All rights reserved. 4 TECHNOLOGY BACKGROUND Video ServicEs Linear Broadcast TV vs. On-demand ContEnt SincE thE very first telEvision nEtwork broadcast ovEr thE air, telEvision has followed thE linEar TV model – that is that thE program lineup has beEn prE-scheduled so that an audiEncE must tunE into a particular telEvision channEl at a particular timE to view a particular program. This is also known as appointmEnt TV. From a transmission technology standpoint, a largE number of viewers were ablE to view thE samE program at thE samE timE bEcausE thE program was (and continuEs to be) broadcast via radio frEquency (RF) carriErs to all users in thE viewing arEa at once. Once thEsE transmissions were distributed
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