more on Broadband eyes a quantum leap

[David Farber <dave () farber net>]

Begin forwarded message:

From: Dewayne Hendricks <dewayne () warpspeed com>
Date: July 21, 2005 5:26:12 PM EDT
To: Dewayne-Net Technology List <dewayne-net () warpspeed com>
Subject: [Dewayne-Net] re: Broadband eyes a quantum leap
Reply-To: dewayne () warpspeed com


[Note:  This comment comes from reader Mark Laubach.  DLH]


> From: Mark Laubach <mark () broadbandphysics com>
> Date: July 21, 2005 1:52:07 PM PDT
> To:  "Dewayne-Net Technology List" <dewayne-net () warpspeed com>
> Subject: SDM vs ETTH over cable.  Why stop at 100Mbps???
>
>
> Recently, Finnish firm Teleste released PR about 100Mbps Ethernet- 
> to-the-home
> over cable.  The information presented is likely a very good  
> summary of the
> general approach of ETTH over Cable.  I'd like to compare some  
> information
> about Broadband Physics' Sub-band Division Multiplexing (SDM) vs  
> ETTH over cable.
>
>                                SDM               ETTH
>                              -----------    ---------------
> Speed (Mbps)                   180               100
> Cost $                       $0 delta       $60.28 to $241
> Changes to cable plant         None              Yes
> Head End changes                Yes           Not stated
> DOCSIS Compatible               Yes               No
> EURO DOCSIS Compatible          Yes               No
> Field Trials                 2H 2005          Summer 2005
> Quantity                       2007              2007
> Patent Protected               Fully          Not stated
>
> For ETTH, the peak speed is 100Mbps with a significant cost to the
> operator per subscriber.   Also, it is not clear what changes need to
> take place at the existing Fiber Nodes in the Hybrid Fiber-Coaxial  
> plant
> Any changes could be potentially expensive.  The biggest drawback  
> is that
> the approach is appears to not be DOCSIS compatible.  Also, it is not
> clear if this is a to-the-home or to-the-device technology.  If it is
> only to-the-home, then the cost to connect subscriber equipment via
> Ethernet needs to be taken into account.
>
> For SDM, the technology uses the exact same Hybrid Fiber-Coaxial plant
> without changes.  The change to subscriber equipment is a chip change
> that is targeted at the same costs as today's chips in mature  
> quantities
> yield a $0 delta cost.  Add $4-$7 to maintain backwards compatibility.
> The native speed provides a peak rate of 180Mbps for each subscriber
> device.  A channel bonding  approach can bring speeds in excess of  
> 1Gbps.
> Head end support is a blade change or a box change.  The technology
> fits neatly into the DOCSIS 2.0 specification, which means
> straightforward compatibility for DOCSIS 3.x adoption.  As SDM is
> already fully patent protected, future cable industry adoption
> would not be subject to any intellectual property challenges.
>
> The quantity time frame for both SDM and ETTH is in 2007.
>
> An complete economic impact comparison requires understanding all the
> system changes required for and ETTH method vs the SDM method.   
> Neglecting
> head end costs, SDM requires $0 changes in existing cable plant  
> between
> the head end and the subscriber equipment.  ETTH will require unstated
> changes in the existing architecture that could be significant.
>
> Which would you choose?
>
> Mark Laubach, CEO
> Broadband Physics, Inc.
>
> At 1:06 PM -0700 7/20/05, Dewayne Hendricks wrote:
>
>
> > Broadband eyes a quantum leap
> >
> > Internet access 50 times faster than current speeds could arrive  
> > via TV cables as early as '06. Reuters reports broadband Internet  
> > access via TV cables will be able to hit 100 megabits per second  
> > as early as next year, 50 times faster than the average broadband  
> > speeds now offered to cable TV homes, a Finnish firm said  
> > Wednesday. Similar data transmission speeds are possible over  
> > fiber networks, but these cost much more for the operators to build.
> >
> > <http://money.cnn.com/2005/07/20/technology/broadband.reut/ 
> > index.htm?cnn=yes>

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