Archived from groups: alt.cellular.cingular (
More info?)
"Randy McLean" <usenetjunk@wo5m.net> wrote in message
news:40C8652F.2090205@wo5m.net...
> Chip wrote:
> >
> > If you are using the EDGE connection to connect your laptop, try
increasing
> > the Windows RWIN (TCP Receive Window Size) global registry setting for
dial
> > up networking to 53248 (this value is being tossed around internally at
CW).
> > Increasing RWIN will overcome some latency issues and throughput will
likely
> > increase as well.
> >
>
> When I first read your message I thought this modification would at best
> give me a 20% increase in speed. I really wasn't expecting all that much
> difference. However, after I made the change I nearly fell out of my
> chair. As I said before, I was seeing an average speed of 80kbps. Well
> now after the change, I am seeing an average speed of 200kbps with peeks
> as high and 300kbps. When I first saw the results my first words where
> something like "holy c***!!!". I still can't believe I seeing these
> speeds. You can view a screen snapshot of the test at
> http
/www.wo5m.net/home_test.jpg. The strange part is I thought 130kbps
> was the theoretical max for EDGE.
>
>
Theoretical max for EDGE is 473.6 kbps. This is not a real world value at
this time. A GSM radio has eight TDMA timeslots. Each timeslot could provide
a 59.2 kbps EDGE data pipe under optimal radio link conditions. However,
EDGE terminal devices (handsets, etc.) are now only designed to use 3-4
timeslots (downlink). For example, a Sony Ericsson GC82 PCMCIA EDGE card is
designed to use 4 timeslots in the downlink (base to mobile) and one
timeslot in the uplink (mobile to base). Best case downlink throughput for
the GC82 would be 236.8 kbps.
There is a decent white paper on EDGE at
http/www.ericsson.com/products/white_papers_pdf/edge_wp_technical.pdf if
you are interested.
begin 666 edge_wp_technical.url
M6T1%1D%53%1=#0I"05-%55),/6AT=' Z+R]W=W<N97)I8W-S;VXN8V]M+W!R
M;V1U8W1S+W=H:71E7W!A<&5R<U]P9&8O961G95]W<%]T96-H;FEC86PN<&1F
M#0I;26YT97)N9713:&]R=&-U=%T-"E523#UH='1P.B\O=W=W+F5R:6-S<V]N
M+F-O;2]P<F]D=6-T<R]W:&ET95]P87!E<G-?<&1F+V5D9V5?=W!?=&5C:&YI
F8V%L+G!D9@T*36]D:69I960],C R,35#-#$R,#4T0S0P,3$W#0H`
`
end
Facebook
Twitter