DSL technology and deployment

Transcription

1 DSL technology and deployment Contributed by Sascha Lindecke Director of Marketing Broadband Access

2 Today there are various DSL Technology Options Family ITU Name Ratified Maximum Speed capabilities ADSL G G.dmt Mbps down 800 kbps up ADSL2 G G.dmt.bis Mb/s down 1 Mbps up ADSL2plus G ADSL2plus Mbps down 1 Mbps up ADSL2-RE G Reach Extended Mbps down 1 Mbps up SHDSL (updated 2003) G G.SHDSL Mbps up/down VDSL G Very-high-data-rate DSL Mbps down 15 Mbps up -12 MHz long reach G Very-high-data-rate DSL Mbps down 30 Mbps up - 30 MHz Short reach G Very-high-data-rate DSL Mbps up/down

3 Existing High Speed Technologies Do Not Solve the Problem of Bottlenecks Data rate [Mbit/s] Design only for short loop applications (MDU/MTU) Real bit-rates are too low for multiple (3) HDTV channels Low bit-rates are insufficient for Triple-Play applications 2 SHDSL 1 km 2 km 3 km 4 km 5 km Line Length = VDSL Speeds with ADSL/2+ Reach and Flexibility

4 Standardization standardization started in January 2004 Main technology development in ITU-T North American system requirements in ANSI/NIPNAI European system requirements in ETSI Reached consent in May 2005 (Geneva Meeting)

5 VDSL-2 Key Features DMT modulation Same as ADSL Bandwidth increased from 12 MHz to 30 MHz Up to 4096 tones (8x!) Worldwide Versatile Standard 8 profiles defined for different services Different bandplans for the regions Variety of PSDs to optimize spectral compatibility Support for a variety of services Integrated Quality of Service features ATM as well as Ethernet payload Channel bonding for extended reach or rate

6 The DSL convergence technology Coding Framing Long Reach Upstream 0 VDSL Bandplans Short Loops EFM TC-Layer Bonding OaM QoS New Features 100/100 Mbps 30MHz QoS

7 - All The Benefits of ADSL/2+, Higher Speeds Than VDSL1 Criteria Benefits Bandwidth VDSL1 12MHz 30MHz Much higher performance for short loops Trellis, SRA, GCI VDSL1 None Mandatory Improved performance Long Reach VDSL1 1km 3km 90% customer reach + single technology ADSL Compatibility VDSL1 None ADSL, ADSL2, Reuse of existing ADSL infrastructure Quality Of Service VDSL1 None Dual Latency, Dual Bearer, Pre-Emption Enable Triple Play applications

8 Rate / MBit/s Performance Symmetrical 100Mbit/s due to 30MHz bandwidth DS (2.2 MHz) DS VDSL1 (12 MHz) DS (30MHz) AWGN/-140dBm/Hz/ANSI-TP1 150 Improved mid range performance through Trellis/Viterbi coding and Generic Convolutional Interleaver ADSL-like long reach performance due to Trellis coding and Echo Cancellation 0 Reach / m Reach / ft* ,500 * Numbers are rounded

9 VDSL-2 Standard Profiles Tx Power 20.5 dbm 8b 17.5 dbm 14.5 dbm A D S L A D S L 2 + 8a No US0 w/ US0 8d 12a,b 17a 30a 11.5 dbm 8c MHz # of Tones kbaud 8 kbaud Analog Bandwidth DSP Power

10 Bandplans, Annexes, PSDs Annex A: ADL Annex A: POTS Annex B: 997 A Annex B: 997 M Annex B: 997 B Annex B: 998 A Annex B: 998 M Annex B: 998 B Annex B: Annex C China 2.2 US DS

11 Backwards Compatibility DSLAM Line Card Phase 1: large installed base ADSL/2+ DSLAM Line Card Phase 2: DSLAM upgrade CPEs can "stay as they are" DSLAM Line Card Phase 3: selective upgrade of CPEs dependent on selected service backwards compatibility will make deployment scenario much more attractive for the Carriers and will speed up the technology adoption.

12 Market Trends Deployment By Region Europe Triple-Play with at least 3 DTV channels + 5Mbps surfing + VoIP 30Mbps downstream, 3Mbps upstream compliant ADSL backwards compatible 20.5dBm transmit power Fits into existing ATM infrastructure ADSL-like long reach performance Main-land China Triple-Play with at least 3 DTV channels + 5Mbps surfing + VoIP 30Mbps downstream, 3Mbps upstream compliant ADSL backwards compatible 20.5dBm transmit power Fits into existing ATM infrastructure ADSL-like long reach performance USA, Canada Triple-Play with at least 3 HDTV channels + 5Mbps surfing + VoIP 30Mbps downstream, 3Mbps upstream compliant ADSL backwards compatible 17.5dBm transmit power ADSL-like long reach performance Japan, Korea, Taiwan Upgrade of existing 70Mbps services to 100Mbps symmetrical 100Mbps downstream, 100Mbps upstream compliant ADSL backwards compatible 14.5/20.5dBm transmit power ADSL-like long reach performance

13 VDSL-2 Standard Regional Requirements Tx Power 20.5 dbm US 12 MHz 20 dbm 2-4k tones 8b EU 17 MHz 20.5 dbm 4k tones APAC 30 MHz 14.5 dbm 4k tones 17.5 dbm 14.5 dbm A D S L A D S L 2 + 8a North EU America 8d 12a,b APAC 17a 30a No US0 w/ US dbm 8c MHz # of Tones kbaud 8 kbaud Analog Bandwidth DSP Power

14 Market Trends Revenue Forecast Worldwide Total VDSL and IC port and revenue forecast volume shipments VDSL shows 90% growth over the course of the next 3 years VDSL is becoming a dominate technology in APAC/Japan 11/04

15 DSL-Forum s mission for VDSL-2 Deployability Integration of VDSL-2 in the network Adaptation for existing TRs Enhancement of ITU standards Interoperability Creating a test plan Working with the interoperability test labs Considering operator requirements

16 DSL Forum contribution to VDSL-2 WT-114: VDSL-2 Performance Test Plan Setting performance targets for VDSL-2 Considering different regions and profiles WT-115: Functionality Test Plan Test plan for functional compliance to the VDSL-2 standard Enables operators to perform homologation of equipment WT-129: Protocol Independent Object Model For Managing Based on ITU G Adopting new objects from G.vdsl2 PD-139: Interoperability test plan for VDSL-2 Enables efficient interoperability testing First plugfest planned for January 2006

17 Conclusion VDSL-2 is the ultimate DSL standard Natural evolution of Best exploitation of Copper Plants Sufficient bandwidth for the years to come VDSL-2 is ramping up quickly Significant tenders in all parts of the world First chipsets and systems available Driven by Video over Broadband DSL-Forum is paving the way for a fast adoption of VDSL-2 Leveraging the experience and specifications for ADSL-2 Assures interoperability and standard compliance Enables mass deployment by seamless provisioning