DSL Technology Evolution. ADSL2/ADSL2plus/ADSL-RE/VDSL2
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1 DSL Technology Evolution ADSL2/ADSL2plus/ADSL-RE/VDSL2
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 VDSL2-12 MHz long reach VDSL2-30 MHz Short reach G Very-high-data-rate DSL Mbps down 30 Mbps up G Very-high-data-rate DSL Mbps up/down
3 Market Status of DSL Technology DSL is the #1 Broadband Choice in the World with over 65% marketshare and more than 200 million users DSL is available in every region of the world, and ADSL owns the majority of the market though VDSL and ADSL2plus are gaining ground DSL is capable of providing up to 100 Mbp, and supports voice, video and data. The new DSL network is IP-centric There is broad equipment interoperability and there are currently established test specifications for ADSL, ADSL2plus, SHDSL, and soon VDSL2 will join the list Finally, ADSL and home networking are a natural fit as DSL effectively supports multiple applications for multiple uses via each DSL connection.
4 DSL Applications Internet Access & File Sharing Video Broadcast TV Video On Demand User generated video Telecommuting Online Education & Shopping Telemedicine Online Gaming
5 How Does DSL Work? Functional Elements Use of Bandwidth Channel Separation & POTS Splitter New IP-centric Architecture
6 Simple overview of ADSL in the phone network POTS- Plain Old Telephone Service
7 All the elements
8 IP Routing Improves the Architecture QoS Breakthrough! ANI Customer Premises Network ASP Computer 1 or 2 PVCs BRAS Ethernet Premises Gateway Printer Internet ISP NNI BRAS Regional / Access Network UNI IP Phone ATM Or IP Transport TR-059 specifies IP Routed Network Architecture to support a mix of IP based services including IP Video from an Application Service Provider, by employing DiffServ. DSLAM
9 TR-101 Reference Model Access Aggregation Moves from ATM to IP Ethernet Legacy ASP/ ATM BNG NSP A10-NSP ASP ATM ATM NSP 1 L2TP A10-NSP L2TS NSP 2 IP - QoS A10-NSP IP Ethernet BNGBRAS ATM Aggregation Access Node (DSLAM) MDF Local Loop NID CPE T User 1 User 2 ASP 1 IP - QoS A10-ASP Regional Broadband Network V Access Network U Customer Prem. Net NSP Network Service Provider ASP Application Service Provider
10 Latest Developments What each DSL flavor offers
11 SHDSL Option Not widely used in the industry G.shdsl (G.991.2) - ITU Recommendation 1st Global Standard for DSL after ADSL Harmonized w/ ETSI SDSL & ANSI HDSL2 - Two-wire Operation Symmetrical and Rate Adaptive 192kbps to 2.312Mbps - Options to the Standard 4-wire operation Repeaters Fixed rate operation at 784 kb/s and kb/s
12 Latest options gaining ground ADSL2 Approved by ITU-T as G July 2002 Features Improved rate up to 12Mbps by 1Mbps Improved reach around 600ft / 180m Power cutback capability Reduced framing overhead Better modulation efficiency Channelisation capability Bonding of lines
13 Strong deployment ongoing ADSL2plus Approved by ITU-T as G January 2003 Features Much increased rates up to 20Mbps by 1Mbps Doubled downstream frequency band to 2.2Mhz Reduced cross talk Allows provision of advanced services Builds on all ADSL2 features Legacy interoperable
14 Service Migration ADSL2plus Backward interoperable VDSL2 Services now available Being installed as the standard modem chip set Interoperability problems effectively overcome ADSL, ADSL2 and ADSL2plus interoperable Services now available
15 Better support of new applications Triple / Quad play is becoming a reality! ADSL2plus and VDSL2 both offer wide area 20+Mbps multi-channel speeds Allows FTTC and direct from exchange service Full service residential 50Mbps by 10Mbps max Wide area business Ethernet Feeder transport to remote nodes using bonding 3 x HDTV (VDSL2), Internet, voice, gaming etc
16 Network Scalability ADSL2plus and VDSL2 With VDSL2 now approved: Backward compatible with ADSL2plus etc Offers highly scalable networks Creates new flexibility for service providers Steadily take fibre closer to the subscriber Migrate ADSL ADSL2plus VDSL2 Easily implemented service expansion and upgrade
17 Standards evolution empower Video delivery at higher speeds Next Generation ADSL: ADSL2 (G.992.3) > performance improvement (+100 kb/s on average) > improved interop, loop diagnostics, robustness > improved initialization & fast start-up > power management ADSL2plus (G.992.5) > downstream bandwidth boost up to 24.5 Mb/s ADSL Reach Extended ADSL: RE-ADSL2 (G annex L) > loop reach increase of 600 to 900 m at low rates (192 kb/s DS + 96 kb/s US) Double upstream (G.992.3/5 annex M) > double upstream bandwidth VDSL2 Very high speed DSL > bandwidths up to 100 Mb/s on short loops > different band plans Plan 997: compromise band plan for symmetric and asymmetric traffic Plan 998: optimized for asymmetry Plan Fx: flexible band plan Most service providers update with a triple pack: ADSL2, ADSL2plus and RE-ADSL at the same time Or go straight to VDSL2
18 Existing High Speed Technologies Did Not Solve the Problem of Bottlenecks 100 Data rate [Mbit/s] Design only for short loop applications (MDU/MTU) 60 VDSL Real bit-rates are too low for multiple (3) HDTV channels ADSL2 + SHDSL Low bit-rates are insufficient for Triple- Play applications 1 km 2 km 3 km 4 km 5 km Line Length VDSL2 = VDSL Speeds with ADSL/2+ Reach and Flexibility
19 VDSL2 Standardization VDSL2 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)
20 VDSL2 Key Features DMT modulation Same as ADSL Bandwidth increased from 12 MHz to 30 MHz Up to 4096 tones (8x ADSL2plus!) 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
21 VDSL2 - All The Benefits of ADSL2/2plus, Higher Speeds Than VDSL1 Criteria Bandwidth Trellis, SRA, GCI VDSL1 VDSL2 VDSL1 VDSL2 None Mandatory 12MHz 30MHz VDSL2 Benefits Much higher performance for short loops Improved performance Long Reach VDSL1 VDSL2 1km 3km 90% customer reach + single technology ADSL Compatibility VDSL1 None ADSL, ADSL2, ADSL2plus Reuse existing ADSL infrastructure Quality Of Service (QoS) VDSL1 VDSL2 None Dual Latency, Dual Bearer, Pre-Emption Enable Triple Play applications
22 VDSL2 Performance 250 Rate / MBit/s Symmetrical 100Mbit/s due to 30MHz bandwidth Improved mid range performance through Trellis/Viterbi coding and Generic Convolutional Interleaver DS ADSL2plus (2.2 MHz) DS VDSL1 (12 MHz) DS VDSL2 (30MHz) AWGN/-140dBm/Hz/ANSI-TP1 ADSL-like long reach performance due to Trellis coding and Echo Cancellation Reach / m ,500 Reach / ft* * Numbers are rounded
23 VDSL2 Standard Profiles 20.5 dbm Tx Power VDSL2 8b 17.5 dbm 14.5 dbm A D S L A D S L 2 + VDSL2 8a No US0 w/ US0 VDSL2 8d VDSL2 12a,b VDSL2 17a VDSL2 30a 11.5 dbm VDSL2 8c MHz # of Tones kbaud 8 kbaud Analog Bandwidth DSP Power
24 Bandplans, Annexes, PSDs ADSL2plus 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
25 ADSL2plus Backwards Compatibility ADSL2plus Modem ADSL2plus Modem ADSL2plus Modem DSLAM Phase 1: large installed ADSL2+ Line Card base ADSL/2+ ADSL2plus Modem ADSL2plus Modem ADSL2plus Modem DSLAM Phase 2: DSLAM upgrade VDSL2 Line Card CPEs can "stay as they are" ADSL2plus Modem VDSL2 Modem ADSL2plus Modem VDSL2 Modem DSLAM VDSL2 Line Card Phase 3: selective upgrade of CPEs dependent on selected service ADSL2plus backwards compatibility will make VDSL2 deployment scenario much more attractive for the Carriers and will speed up the technology adoption.
26 Market Trends Deployment By Region Europe Triple-Play with at least 3 DTV channels + 5Mbps surfing + VoIP 30Mbps downstream, 3Mbps upstream VDSL2 compliant ADSL backwards compatible 20.5dBm transmit power Fits into existing ATM infrastructure ADSL-like long reach performance Mainland China Triple-Play with at least 3 DTV channels + 5Mbps surfing + VoIP 30Mbps downstream, 3Mbps upstream VDSL2 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 VDSL2 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 VDSL2 compliant ADSL backwards compatible 14.5/20.5dBm transmit power ADSL-like long reach performance
27 Broadband Forum s VDSL2 Work in Progress Interoperability Finalizing performance/functional requirements (WT-114 and WT-115) Interoperability test plan for VDSL2 (PD-139) Enables efficient interoperability testing First plugfest planned for January 2006 Ongoing test events with the interoperability test labs Management Protocol Independent Object Model For Managing VDSL2 (WT-129) Based on ITU G Adopting new objects from G.vdsl2
28 Summary ADSL2plus and VDSL2 offer triple play at last Reach allows wider serving areas Rates allow triple play and enhanced services Ethernet rapidly taking over from ATM Offers LAN extension type services no signal conversion Network architecture evolving faster than ever before Broadband Forum driven
29 Release Plan Provides overview and roadmap of key TRs
30 BroadbandSuite Release 1.0 Key Capabilities : Internet access via ADSL or SHDSL over a QoS-enabled ATM architecture. Supports VoIP transport & VoDSL ACCESS R1.0 HOME R1.0 CONTROL R1.0 TR-059 : Architecture Requirements for the Support of QoS-Enabled IP Services TR-067 : ADSL Interop Test Plan TR-092 : Broadband Remote Access Server (BRAS) Requirements Document TR-060 : Interop Test Plan for SHDSL TR-043 : Protocols at the U Interface for Accessing Data Networks using ATM/DSL TR-042 : ATM Transport over ADSL Recommendation TR-025 : Core Network Architecture for Access to Legacy Data Network over ADSL TR-013 : Interface & Configurations for ADSL: Central Office TR-069 : CPE WAN Mgmt Protocol TR-111 : Applying TR-069 to Remote Management of Home Networking Devices TR-068v2 : Base Requirements for an ADSL Modem with Routing TR-064 : LAN-Side DSL CPE Configuration Specification TR-133 : TR-064 Extensions for Service Differentiation TR-104 : Provisioning Parameters for VoIP CPE TR-098 : Gateway Device Version 1.1 Data Model for TR-069 TR-062 : Auto-Config for the Connection Between the DSL Broadband Network Termination (B-NT) and the Network using ATM TR-061 : Interfaces and System Configurations for ADSL: Customer Premises TR-090 : Protocol Independent Object Model for Managing Next Generation ADSL Technologies TR-066 : ADSL Network Element Mgmt TR-051 : DSL Specific Conventions for the ITU-T Q Performance Mgmt Bulk Data File Structure TR-050 : CORBA v2 for ADSL EMS-NMS Interface TR-027 : SNMP-based ADSL LINE MIB TR-024 : DMT Line Code Specific MIB
31 BroadbandSuite Release 2.0 ( ) Key Capabilities : Triple-play access via ADSL2plus over a QoS-enabled Ethernet architecture. Full support for multicast to enable IPTV streaming. ACCESS R2.0 HOME R2.0 CONTROL R2.0 TR-101 : Ethernet-centric multicast-capable TR-124 : Functional Requirements for architecture Broadband Residential Gateway Devices TR-130 : xdsl EMS to NMS Interface Functional Requirements TR-100 : ADSL2plus performance test plan TR-069 Amendment 1 : CPE WAN Management Protocol TR-067 Issue 2 : ADSL Interoperability Test Plan TR-098 Amendment 1 : Internet Gateway Device Data Model for TR-069 TR-122 : Base Requirements for Consumer-Oriented Analog Terminal Adapter Functionality TR-129 : Protocol-Independent Management Model for Next Generation DSL Technologies TR-128 : Addendum to TR-090, Protocol Independent Object Model for Managing Next Generation ADSL Technologies TR-068 : Base Requirements for an ADSL Modem with Routing
32 BroadbandSuite Release 3.0 (late 2008) Key Capabilities : Triple-play access via GPON over a QoS-enabled Ethernet architecture. Full support for multicast to enable IPTV. Integrated remote management of Set-Top Box ACCESS R3.0 HOME R3.0 CONTROL R3.0 TR-101 : Ethernet-centric multicast-capable architecture WT-156 : Extending TR-101 to GPON fibre access systems WT-138 : Validation of G Parameters WT-127 : Dynamic Testing of DSL Transceivers with Splitters TR-135 : Residential Data Model TR-117 : Broadband Trouble for a TR-069 Enabled Set Top Reporting Box TR-140 : Data Model for a TR- 069 Enabled Storage Device TR-142 : Framework for use of TR-069 with PON Access TR-143 : CPE Throughput Performance Test Mechanism TR-141 : Protocol Independent Management Model for TR-101 Compliant Access Node WT-147 : Layer 2 Control Mechanism WT-159 : Management Framework for xdsl Bonding WT-107 : Internet Gateway Device Data Model version 2 (includes bonded DSL) WT-176 : ADSL2plus Profiles for IPTV PD-157 : TR-069 Common Managed Objects Work that is complete
33 Thanks for taking the time to learn about our DSL related work Check out our Release Program to learn more about related TRs
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