eXtremeDSL
MAX
is Centillium's innovative technology that redefines the
performance capabilities of DSL by an efficient use of the DSL spectrum.
VDSL provides very high
rate on very short loops
VDSL-deployable
but at lower
downstream rates
than MAX-QS
VDSL-deployable
range
Beyond about 4200 feet, there
is no VDSL connection,
however, there is ADSL
connections with MAX-QS,
MAX-DS, or MAX-LR
feature set
0 ~1 Kft ~2.5 Kft ~4.2 Kft 22 Kft
MAX-QS MAX-DS ADSL MAX-LR
MAX-QS
MAX-DS
ADSL DS
MAX-HBL
>15 bits
15 bits
Vertical
Expansion
Horizontal
Expansion
for Downstream
Frequency
Spectrum
25KHz 138KHz 1.1 MHz 2.2 MHz 3.75 MHz
Horizontal
Expansion
for Upstream
ADSL
US
ADSL
MAX-HBL
47211 Lakeview Blvd., Fremont, CA 94538
Tel: (510) 771-3700
Fax: (510) 771-3500
Email: info@centillium.com
Web: www.centillium.com
© 2003 Centillium Communications, Inc. Centillium, the
Centillium logo, Linked by Centillium Logo are trademarks of
Centillium Communications, Inc. All other trademarks used
herein belong to their respective companies.
eXtremeDSL
MAX
versus VDSL Performance
What is
eXtremeDSL
MAX
?
What is the
Significance of
eXtremeDSL
MAX
?
This technology accelerates the introduction of new premium services
such as High Definition Television (HDTV), Video on Demand (VoD), Voice
over Packet (VoP), and Video & Audio Streaming, in addition to very fast
and always-on Internet access for consumers over the metallic loops.
eXtremeDSL
MAX
technology is backward compatible to ADSL2 and
ADSL2plus, allowing service providers to also benefit from using their
existing ADSL infrastructure.
The technology is intelligently designed to allow an expansion of ADSL,
ADSL2 and ADSL2plus service coverage, enabling the service providers
to increase their revenue through increased subscriber base.
The eXtremeDSL
MAX
MAX-QS feature
enables the delivery of "VDSL-like rates" for
short loops with ADSL economics. Beyond
approximately 4,200 feet, VDSL runs out of
upstream bandwidth, making it unattractive
for deployment for medium to long loops.
Beyond approximately 2,500 feet, MAX-QS
outperforms VDSL.
The eXtremeDSL
MAX
covers a broader range
of market segments for the DSL market
compared to VDSL while it matches its
downstream rate of up to 50Mbps rates.
eXtremeDSL
MAX
Spectrum Efficiency
eXtremeDSL
MAX
technology maximizes the
use of the DSL channel capacity to deliver
the highest bit rate possible for any given
loop condition. The actual performance of
ADSL service depends upon many physical
factors such as available spectrum, sub-
scriber distance from the Central Office
(CO), and noise condition surrounding the
subscriber metallic loop.
· The MAX-HBL feature provides increased
efficiency across the spectrum. Based on
the ITU-T G.dmt standard, bit loading is
limited to 15 bit per DMT tone, whereas
MAX-HBL allows greater than 15 bit loading.
· With the MAX-DS feature, the spectrum for
downstream is doubled compared to ADSL
· With the MAX-QS feature, the spectrum for
downstream is quadrupled compared
to ADSL.
· Similarly, with the MAX-EU feature, the
spectrum for upstream is doubled
compared to ADSL.
Glossary of Terms
- ADSL: Asymmetrical DSL based on ITU-T G.992.1 (G.dmt)
- ADSL2: ADSL based on ITU-T G.992.3 (bis extensions to ADSL)
- ADSL2plus: ADSL based on ITU-T G.992.3 & G.992.5
- WLAN: Wireless LAN feature for CPE based on 802.11x
- VOP: Voice Over Packet for CPE to support multiple telephony lines
- STB: Set Top Box to deliver video-type applications
Centillium uses a combination of innovative algorithms, silicon, software, and firmware
to deliver eXtremeDSL
MAX
features. The list of features is as following:
· Quad Spectrum (MAX-QS)
· Double Spectrum (MAX-DS)
· Extended Upstream (MAX-EU)
· High Bit Loading (MAX-HBL)
· Long Reach (MAX-LR)
eXtremeDSL
MAX
technology enables service
providers to roll out exciting new services to
consumers, significantly increasing their Average
Revenue Per User (ARPU).
Value-add services for the mass market can
be bundled over a single DSL line to offer a
combination of video, telephony, and data
(triple-play) services.
A variety of new residential multi-application
Customer Premise Equipment (CPE) will become
available such as DSL cordless phones or DSL
routers with any combination of WLAN, VOP, or
STB interfaces or integrated functions.
eXtremeDSL
MAX
technology maximizes the use of
the DSL channel capacity to deliver the highest
bit rate possible for a given loop condition. The
actual performance of the ADSL service depends
upon many physical factors such as available
spectrum, subscriber distance from the Central
Office (CO), and noise condition surrounding the
subscriber metallic loop. The MAX-HBL feature
provides increased efficiency for all scenarios.
· With MAX-QS feature, bit rates up to 50Mbps
are delivered for shorter loops.
· With MAX-DS feature, bit rates up to 24Mbps
are delivered for short-to-medium loops.
· For ADSL with high bit loading, up to 12Mbps
are delivered for medium loops.
· With MAX-LR feature, bit rates above 128Kbps
are delivered to long to very long loops.
eXtremeDSL
MAX
creates a new premium
service area of 50Mbps downstream bit
rates for subscribers closer to Central
Office (CO) within the DSL service cover-
age. This service area is enabled through
the MAX-QS and MAX-HBL features.
Increasing
Service
Differentiation
Profit Per
Subscriber
VoD
Video
Streaming
Interactive Gaming
VoP Telephony
Local & Long Distance
High-Speed, Premium Internet Access
Basic Internet Access
VoD
Video
Streaming
Interactive Gaming
VoP Telephony
Local & Long Distance
High-Speed, Premium Internet Access
Basic Internet Access
HDTV, Multiple Video Channels
Video on Demand,
Multiple Video Streaming
Traditional, ADSL, Telephony,
Streaming Media
Internet Access
Reach
Rate
Enhanced Services, Increased Revenue
More Subscribers, Increased Revenue
Up to 50 Mbps
Up to 24 Mbps
8-12 Mbps
128-288 Kbps
MAX-QS
MAX-DS
ADSL
MAX-LR
MAX-QS
MAX-DS
ADSL
MAX-LR
A new DSL service area
for 50Mbps downstream
with MAX-QS &
MAX-HBL features
DSL service coverage
per Central Office (CO)
CO
CO
Extending DSL coverage
with MAX-LR feature
ADSL2 service coverage
per Central Office (CO)
CO
ADSL2plus service
area for 24Mbps
downstream
DSL service coverage
per Central Office (CO)
24Mbps service reach is
increased by 700% under
24 disturber noise conitions
with use of MAX-QS &
MAX-HBL features
CO
CO
eXtremeDSL
MAX
Feature Set
Quad Spectrum
(MAX-QS)
Double Spectrum
(MAX-DS)
Extended Upstream
(MAX-EU)
High Bit Loading
(MAX-HBL)
Max Long Reach
(MAX-LR)
Remarks
· Enables delivery of ADSL downstream rates of
up to 50Mbps using Quad Spectrum mode
· Uses frequency spectrum from 138Khz to
3.75Mhz for downstream
· Enables delivery of ADSL downstream rates of
up to 24Mbps using Double Spectrum mode
· Uses frequency spectrum from 138Khz to
2.2Mhz for downstream
· Enables delivery of ADSL upstream rates of
up to 3Mbps using Extended Spectrum mode
· Uses frequency spectrum from 25Khz to
276Khz for upstream
· Enables ADSL DMT bit loading of more
than 15 bits per tone
· Enables delivery of ADSL service with
reasonable rate up to 22,000 ft. (7,000 m)
Benefits
· "Video-rates" with ADSL technology: Up to 50Mbps
downstream for delivery of video type services for short loops
· Service coverage area extension for premium services:
Increase ADSL2plus reach for 24Mbps service by 700% (under
24 disturber noise conditions)
· ADSL2plus technology: Up to 24Mbps downstream for video
type services for short-medium loops
· Service coverage area extension for premium services:
Increase ADSL reach for 12Mbps service by 700% (under 24
disturber Noise conditions)
· Higher upstream rate for ADSL power users:
Up to 3Mbps upstream for peer to peer applications
· Enables delivery of higher bit rate with increased bit loading:
up to 20% increase in rates
· Extended ADSL service coverage for long-loop subscribers:
20% increase in ADSL reach
Broadband Services Value Chain
ADSL Rates & Triple-play Services
ADSL Service Coverage
eXtremeDSL
MAX
Benefits:
· Delivers bit rates up to 50Mbps downstream and up to 3Mbps upstream
· Allows delivery of triple-play services (video, telephony, data) at ADSL economics/costs
· Uses existing ADSL infrastructure
· Increases the service area coverage for premium services such as 12Mbps, and 24Mbps
· Extends the reach of ADSL service up to 22,000 ft. (7,000 m)
· Enhances the robustness of ADSL connections
· Enables flexible traffic management schemes
· Builds upon existing ITU-T ADSL G.dmt and newly agreed G.dmt-bis standards
· Backward compatible to ADSL, ADSL2, and ADSL2plus
eXtr
emeDSL
MAX
Scenario 1 : Creating new DSL service area
with MAX-QS
Scenario 2 : Extending DSL service areas
with MAX-QS
Scenario 3 : Extending DSL service coverage
with MAX-LR
ADSL2plus allows the delivery of up to 24Mbps
downstream bit rates. Using eXtremeDSL
MAX
MAX-QS, the reach of 24Mbps is increased
by 700% (under 24 disturber noise condi-
tions) as opposed to the reach provided by
ADSL2plus (ITU-T G.992.3 & G.992.5) alone.
Using MAX-LR, the DSL service reach
per Central Office (CO) is increased by
20% as compared to ADSL2.
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