[MLB-WIRELESS] Final 802.11g draft standard throttles data rates down ... to 10-20Mbps

sanbar sandbar at ozemail.com.au
Fri May 23 11:51:03 EST 2003


Posted to /. a while ago ... shite, this will kill 802.11g's appeal.
- Barry

Final 802.11g draft standard throttles data rates down

The lower throughput is needed to protect 802.11b WLAN gear

By Bob Brewin
MAY 22, 2003

Content Type: Story
Source: Computerworld

The Institute of Electrical and Electronics Engineers Inc. (IEEE) has
approved a new and final draft standard for 802.11g wireless LANs that will
have a true throughput for Internet-type connections of between 10M and
20Mbit/sec., far lower than 54Mbit/sec. raw data rate initially billed for
the standard.
The standard was approved by the IEEE on May 15 but won't be made publicly
available until members of the IEEE 802.11 working group ratify it next
month, according to Sheung Li, a product line manager at Atheros
Communications Inc., a Sunnyvale, Calif-based WLAN chip manufacture.

Li said the lower actual vs. raw data rates for 802.11g arose from the need
to assure backward compatibility with millions of existing 802.11b Wi-Fi
client devices and access points that operate in the same 2.4-GHz frequency
band. The 802.11g standard includes built-in protection mechanisms to ensure
that the devices don't interfere with older 802.11b devices. That means the
11g systems will need to transmit an electronic warning to 11b devices that
a 11g device is operating, a warning that is enough to cause a cutback in
actual throughput, Li said.



barry park
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