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Technology Stocks : Broadband Wireless Access [WCII, NXLK, WCOM, satellite..]
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To: zbyslaw owczarczyk who wrote (1002)1/6/2000 3:59:00 PM
From: Bernard Levy  Read Replies (1) of 1860
 
TDMA when viewed as a scheme which assigns fixed time
slots to fixed users is also obsolete, but this is not what
advanced wireless ATM or IP systems implement. They
allocate time slots dynamically to users who need them,
using a contention resolution scheme. Some systems even
allocate dynamically time slots to downstream
and upstream transmission within the same frequency
band (older systems allocate different frequency bands
for downstream and upstream transmission).

The bottom line here is that all the old simplistic
paradigms TDMA/FDMA/CDMA that George Gilder likes
to throw around do not apply for statistically
multiplexed multiple access systems.
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