Deutsche Telekom Super Vectoring @ FTTC The Hague, June 2015
Fixed access network strategy long term goal: FTTH. Access Network Evolution ADSL2+ ( 16 Mbps) FTTC: Vectoring (100 Mbps) FTTdp* (> 500 Mbps) FTTB (> 500 Mbps) FTTH (1.000+ Mbps) Building to the Cabinet Building PON Topologies Building Twisted Pair Twisted Pair CAB -DF Economical Optimum FTTC VDSL/Vectoring: now ca. 80% of households over 50 Mbit/s depending on regulatory adjustments Migration VDSL2 VDSL2 Vectoring FTTH now where economically reasonable FTTB with G.fast G.fast addresses short loops < 250 m with acknowlegded potential for longer loops Enabler for GPON based FTTH FTTdp cost effectiviness in DT network is not given * FTTdp concept is no standard topology in the German copper access network. 2
access network structure - FTTC FTTC Topology Today Active Cabinets = + Access Node (MSAN/DSLAM) Passive Cabinets served via branch cables from Strategic Outdoor Locations (SOL) Typical cabinet size: 120 150 customers 300+ customers per Access Node Central Office Active Cabinet Passive Cabinet Branch cable < 100 pairs E-side cable D-side cable: buried without ducts Deutsche Telekom / Ultra-Fast Broadband Seminar 2015 June 2015 3
Super Vectoring@FTTC offers enhanced services within FTTC Deployments Super Vectoring@FTTC ADSL2+ ( 16 Mbps) FTTC&VDSL/ Vectoring ( 100 Mbps) FTTdp* ( 500 Mbps) FTTB * ( 500 Mbps) FTTH (1.000+ Mbps) to the Central Office to the Cabinet near or to the home Kundengebäude CuDA dp* CuDA MFG MFG to the Cabinet mit Super Vectoring@FTTC Super Vectoring@FTTC (> 250 Mbps) CuDA Access Node with new Linecards MFG Characterization >250 Mbps Downstream from Vectoring enabled cabinets Increased Coverage for 100 Mbit/s Future proof FTTC services Protection of FTTC investments Simple extension of existing Access Nodes Full coexistence to Vectored VDSL2 Full Interoperability to VDSL2 Super Vectoring suits perfectly between Vectoring and G.fast. Deutsche Telekom / Ultra-Fast Broadband Seminar 2015 June 2015 4
Aggregate bit rate in Mbit/s FTTC A Rate - Reach Analysis Super Vectoring tops G.fast on long loops 900 800 700 600 500 400 300 200 100 Single Line Performance Aggregated (US + DS) 0.5mm cable concatenation of 0.5mm and 0.4mm cable VDSL2 Profile 35b G.fast 0 0 5 10 15 20 25 30 loop attenuation @ 4 MHz 33 db / km Source: Alcatel-Lucent, measured on cable as model BBF TR-285I- O2YS(ST)H 10x2x0.5 STVI Bd, G.fast 20 MHz 106 MHz Services Super Vectoring (Annex Q) > 250 Mbps enhanced coverage for longer loops (100 Mbps) is required as well Higher rates for shorter loops are just nice to have Service rates for Super Vectoring shall enable multiple 4k TV streams Germany: G.fast fits FTTB perfectly, but has limited value for FTTC deployments. G.fast long reach Performance and node size are crucial. 5
Limit PSD Mask in dbm/hz SuperVectoring@FTTC Technical Key facts profiles and Band plan are decided SuperVectoring uses up to 35 MHz spectrum Distribution Cable, typ. 350 400 m New Linecard for MSAN Customer Building Limit PSD Mask 998ADE35 - (ITU-T) Cabinet to - 30-50 Upstream PSD Mask Downstream PSD Mask ~G.fast PSD - 70-90 New CPE for SuperVectoring Self-Install, Naked DSL - 110 0 5 10 15 20 25 30 35 40 f in MHz Key performance enhancement with extended downstream spectrum up to 35 MHz, following the G.fast G.9701 PSD above 30 MHz New Super-Vectoring Linecard New Vectoring Engine on demand (Super Vectoring processing ressources = 2 x Vectoring) 6
Super Vectoring = VDSL2 Annex Q in ITU-T Q4 VDSL2 Annex Q in ITU-T and ETSI Annex Q is based on existing ITU-T VDSL2 recommendation Changes to VDSL2 standard are kept as small as possible, no changes on major core functions February 15: Agreements for VDSL2 Annex Q: Profile 35b 1 st set of Profile and bandplan up to 35 MHz initial working text for Annex Q April/May 15: Liaison based cooperation with ETSI consolidation of European VDSL2 Annex B PSD and Band Plan options 7
Conclusions Summary Super Vectoring aka VDSL2 35b is the perfect solution to technically and economically optimize our current FTTC Vectoring rollout Standardization for VDSL2 Annex Q is within reach G.fast FTTB is a new enabler for the long term strategy FTTH If you let us We ll come back at UFBB next year to share our experiences! 8