Robert, I thought you would like to see another side of the story,both of us until now have not been looking at. Its a great story,and with new digital technology pioneered by TI,HP and Stanford telecom with provide 2-way fully interactive service at speeds of 54-155 mbps downstream and T-1 upstream. Also no infrasctucture is needed other than a base station,and some small microcell nodes on rooftops.
Second generation all-digital LMDS technology is just now coming to
market. The digital difference is profound. Rather than merely providing
one-way distribution of video programming, digital LMDS makes possible
the quantum leap to fully interactive, two-way switched broadband
networking in the local loop. In theory, it can delivery as much data
downstream (from the network to the consumer) as upstream (from the
consumer to the network). This symmetrical capability immediately
redefines the potential for high bandwidth interactive applications such
as video conferencing, video-on-demand, fast residential Internet
access, and highly flexible networked computing.
A "typical" commercial LMDS application can provide a staggering
downlink throughput of 51.84 - 155.52 Mbp/s (SO155.52 Mbp/s (SONET OC-1
to OC-3), and a return link of 1.544 Mbp/s (T1). This capacity
translates into phenomenal potential to provide "full service network"
packages of integrated voice, video and high-speed data services. Actual
service carrying capacity depends on how much spectrum is allocated to
video versus voice and data applications. Assuming that 1 GHz of
spectrum is available, an all-video system could provide up to 288
channels of digital broadcast quality television plus on-demand video
services. If the system were engineered for voice and voice grade data
only, it could serve up to 18,400 main lines (DS0), or about 60,000
consumer telephones, assuming a compressi 1 In mixed residential and
business areas, LMDS operators will likely provide a blend of video and
voice services and configure spectrum to meet local market needs. An
"average mix" commercial system could offer 156 video channels and up to
7,000 DS0 main lines (without compression), in each cell coverage area.
The problems have been overcome on LMDS,the digital technology is here,now,and the FCC auction for 28 GHZ is scheduled for December. Watch out,this will connect to HFC very well,and won't require alot of money. Hey,anyone want to start a company with me?
the URL is at
ctr.columbia.edu
Its a screamer!
Hiram |
