Data over Coax - The Best Last Mile Access Technology before FTTH
Data over CoaxThe Best Last Mile Access Technology before FttHANGA COM 20134-6.6.2013Hanno NarjusSenior Vice President, Video and Broadband SolutionsON EVERY STREET CORNER IN EUROPE
Or in Other Words:Should your Next Generation CMTS be Installed Here?ON EVERY STREET CORNER IN EUROPE
Evolution to All-IPOn-demand TV drives Moore’s law in access networkChallenges in coping with traffic growthover next 3-5 years:• Traffic doubles every 18 months• All VoD subscribers will become broadband subs =>stepwise increase in broadband capacity• Network dimensioning to be done for the unicast TVbusy hour• Sustained speeds up to 30 Mbps / HH• # of QAM ports will grow 4-6 fold• How to monetize the associated CAPEX?• Physical size: there is no room in central office sites• Power consumption to match the competition
CMTSDocsis 3.0DVB VoD1000 HP /segmentCCAPDocsis 3.0DVB VoD250-500 HP /segmentCCAPDocsis 3.1All-IP VoD100-250 HP / segmentSpectrum upgrade (CPE,Amps, passives)Distributed architectureMore capacity (3.0 32 DS / 8 USor EPOC / GPOC)All-IP50-100 HP / segmentDistributed architectureDocsis 3.0DVB VoD100-200 HP / segmentFTTHDistributedarchitectureDocsis 3.1 / EPOC/ GPOCAll-IP100 HP / segment
CMTSDocsis 3.0DVB VoD1000 HP /segmentCCAPDocsis 3.0DVB VoD250-500 HP /segmentDistributed architectureMore capacity (3.0 32 DS / 8 USor EPOC / GPOC)All-IP50-100 HP / segmentDistributed architectureDocsis 3.0DVB VoD100-200 HP / segmentAn example scenario1. CCAP to be launched for lower CAPEX + red-cellfighting node segmentation2. Distributed architecture for ”hot spots” in the network• Uniform Docsis 3.0 platform (postpone 3.1 launch)• Avoidance of spectrum upgrade major CAPEX• Further segmentation• Future proof optical transmission in acces3. Launch more capacity• Either stay at Docsis 3.0 + segmentation or• Future technology e.g. EPOCFTTH
Distributed CMTS architecture pros / consBenefits• Plenty of capacity / subscriber• Future proof metro Ethernet opticalaccess• Simplified and lower CAPEX opticalaccess network• Simplified DoC Access Hub(compared to centralized CMTS / CCAP)=> competitive CAPEX / QAM portDrawbacks• Less dynamic capacity allocationacross subscribers => capacity reserveupfront investment for 3+ years• More complexity distributed in thenetwork => Network Management toolsare a must to reach low OPEX• Technology upgrade requires truck-roll(e.g. Docsis 3.1)
Data over Coax technologiesConclusions• Docsis DoC is the natural choice today in developed cable markets• Mature standard, developed for access networks• Wide availability and installed base of low-cost subscriber modems• Works in existing two-way coax networks, up to 1 GHz• Enables a smooth evolution from central-office CMTS to distributed DoC Access Hubarchitecture• MoCA and G.hn: for telecom operators targeting to operate > 1GHz• Very robust modulation schemes – can work in poor quality coax plant• Option to use frequencies above 1 GHz – with obvious unknowns• Main focus on home-networking => standards do not cover needed functions (Ethernetnetworking, security, provisioning, mgmt, ...) for access networks• Do not work in coax networks with amplifiers• EPoC is an option for the future (2014-2015?)
Data over CoaxCharacteristics of attractive deployment scenarios1. In conjunction with deep fibre upgrade (segment size c. 100 subs)2. When sustained high-speed connectivity is needed• High volume of unicast IP TV traffic• Business subscribers• Hospitality markets3. Deployment of distributed CMTS in ”hot spots”• Gradual evolution to distributed CMTS architecture4. Small network Docsis solution• CAPEX scales down to small number of potential subscribers• E.g. in Central / Eastern Europe5. Telco’s targeting housing associations• Competitive alternative to VDSL
Data over CoaxSummary• On-demand TV services will generate exponential growth in traffic• Data over Coax is a promising next generation architecture• High capacity for the typical FttLA / FttB segment sizes• Future proof investment in Ethernet optics• When sustained high-speed connectivity is demanded• Interesting migration scenarios can be identified for deployments starting today• Cable ops: evolution starting from hot-spot segments• Telco’s: housing associations market• Hospitality, B2B customers, backhaul for WiFi hotspots• Further studies needed on e.g.:• E2e CAPEX comparisons• Provisioning and maintenance business processes
Thank You!Q & AON EVERY STREET CORNER IN EUROPE
A particular slide catching your eye?
Clipping is a handy way to collect important slides you want to go back to later.