[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
RHCE
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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