[clug] ADSL2+ speeds (Getting O/T)

Steve Walsh steve at nerdvana.org.au
Fri Feb 13 00:38:01 GMT 2009

Alex Satrapa wrote:
> Hrm... I was always under the impression that HSPDA was slower than 3G!
HSDPA (High Speed Downlink Packet Access) provides improved theoretical 
down-link performance of up to 14.4 Mbit/s. Most deployments provide up 
to 14.4 Mbit/s in down-link. Up-link performance is a maximum of 384 kbit/s.

Then we start getting into the stuff we'll never see, like HSUPA (High 
Speed Uplink Packet Access) providing improved up-link performance of up 
to 5.76 Mbit/s theoretically, or Evolved High Speed Packet Access 
(HSPA+) which boosts peak data rates to 42 Mbit/s on the downlink and 22 
Mbit/s on the uplink.

4G offers "A nominal data rate of 100 Mbit/s while the client physically 
moves at high speeds relative to the station, and 1 Gbit/s while client 
and station are in relatively fixed positions", with "A data rate of at 
least 100 Mbit/s between any two points in the world".

3G-style networks are hobbled by being based on two parallel 
infrastructures consisting of circuit switched and packet switched 
network nodes respectively, whereas 4G will be based entirely on packet 
switching only.

Steve Walsh
Vice President / SysAdmin Team member- Linux Australia
Networks and Technology - Linux.conf.au 2008
perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'

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