HSPDA dropping?

[dragon2611]

Been using my E220 to surf the internet for a while today noticed that it keeps switching between HSPDA and 3g mode quite a lot

Only have it plugged into a single usb port (not sure if that makes a difference)

I dont get a connection drop or anything just the led colour changes and the speed (although with browsing its not so noticable)

usb manager showing full bars for signal strengh.

[Andyroo]

Ok,

HSDPA in my experience only kicks in when you are actually browsing/downlading something.

For example, Open an internet browser on my vario II forces the phone to connect to the network. Then when i request a link, it goes into HSDPA mode. When the page has finished downloading, it drops back to 3g.

Also, if im listening to a radio station which is a constant download, the HSDPA will remain active. When I stop the stream, it jumps back down to 3g.

Is this similiar to what youre experiencing, if so, I can tell you its perfectly normal.

[dragon2611]

Ok,

HSDPA in my experience only kicks in when you are actually browsing/downlading something.

For example, Open an internet browser on my vario II forces the phone to connect to the network. Then when i request a link, it goes into HSDPA mode. When the page has finished downloading, it drops back to 3g.

Also, if im listening to a radio station which is a constant download, the HSDPA will remain active. When I stop the stream, it jumps back down to 3g.

Is this similiar to what youre experiencing, if so, I can tell you its perfectly normal.

Oh right fair enough then :D

It sometimes drop back to 3g in the middle of loading a page though, USB monitor did show full signal, not sure where the nearest tower is but i think it was quite near, was getting 1.5mbit/s thoughput at one point (with HSPDA on)

It was raining outside not sure what effect that has on UTMS signals if any...

[Andyroo]

try http://www.sitefinder.ofcom.org.uk/ to find your nearest transmitter.

As for 1.5mbps, I never heard of a HSDPA transfer that fast before, the max ive ever got out of it is 1015k.

[dragon2611]

try http://www.sitefinder.ofcom.org.uk/ to find your nearest transmitter.

As for 1.5mbps, I never heard of a HSDPA transfer that fast before, the max ive ever got out of it is 1015k.

Hmm yep its the on on top of the local telephone exchange which with the location i was at at the time being in top of a hill i pratically had a direct line of sight on it (or i would have done if i was upstairs)

It wasnt 1.5mbit/s sustained for very long was varying between about 512kps - 1.5mbit/s

Still pretty impressive though, i was happy with it ;)

I know one of the places i sometimes go only has GPRS coverage according to the streetchecker going there sometime in september... it shows 2 bars of 2g coverage and some blackspots on the map.

Hoping my modem will at least get a good enough signal to maintan a stable GPRS connection there.

EDIT:

Ment to ask is the UK grps network EDGE enabled?

[Andyroo]

the only UK network that supports edge is orange and this only complements their 3g network in some areas only

[dragon2611]

the only UK network that supports edge is orange and this only complements their 3g network in some areas only

Oh right?

I take it GPRS speeds are about that of dialup?

[Andyroo]

GRPS is indeed like dialup, unbearable if u ask me.

[dragon2611]

GRPS is indeed like dialup, unbearable if u ask me.

what can one do, its its a choice between GPRS or nout then ill take GPRS ;)

[Andyroo]

i have to agree with u

[dragon2611]

i have to agree with u

Well they do have a broadband there but they charge £25 for the week to use it :mad: There is somewhere with free dialup access but its in public and i hate people reading my screen.

it was only £4 more to get the t-mobile (yes i know theres minimum term contract) so for a one off the lan would have been cheaper

but the advantge of the WNW+ is it works pretty much anywhere ;)

[Andyroo]

who charges £25 a week for bb?

[dragon2611]

who charges £25 a week for bb?

http://www.yarnfieldpark.com/

I get sent there sometimes for training.

[Andyroo]

they want shot!

[dragon2611]

they want shot!

I think BT own the lease on it atm as well, :rolleyes: Although apprently the BB contract for the rooms had already been signed before BT took ever the lease

Pity it wasn't an openzone hotspot i still got a shedload of minutes that expire in a couple of months (have BT BB at home)

[Andyroo]

praise the lord that the UK has web and walk!!!

[dragon2611]

praise the lord that the UK has web and walk!!!

yes, although who thought of that name :rolleyes:

Surfing whist walking isn't actually that easy you tend to walk into things ;) :laugh:

[Andyroo]

web whilst you have walked? who knows, better than data 500 or web 256 eh?

[dragon2611]

web whilst you have walked? who knows, better than data 500 or web 256 eh?

true i guess its not ment to be taken literally.

Pity I can't find what i did with my bluetooth GPS I figure that with WNW+ & Google earth might be interesting.

[Andyroo]

i was totally put off by buying an external gps when the vario III is coming soon on tmobile with integrated gps chipset!

[dragon2611]

i was totally put off by buying an external gps when the vario III is coming soon on tmobile with integrated gps chipset!

I had it to use with a PDA it was just a cheapo Bluetooth GPS off ebay, although I found it a bit cumbersome to carry that + PDA + Dock around and i found it sometimes had trouble with the bluetooth link between the PDA and the GPS.

I have a standalone sat-nav unit which does the job much better, currently using a streetpilot i3 which although rather basic is surprisingly good.

I'm sure now theres much better sat-navs out but at the time it cheap for a sat-nav and i was on a budget.

[ChristopherW]

Just to add to the original topic (HSDPA reverting to 3G after data transfer's finished) HSDPA acts like a peer-to-peer network in some respects, like a multi-routed network - the phone pulls 'strands' of the requested data via multiple masts if you can get reception from more than one, so if you're in an urban area with good blanket 3G reception, chances are you'll max out your connection. If you can only see one mast with 3G reception, you'll have to fight it out with other users and there's only a finite amount of bandwidth available to each base station, so you'll probably see lower speeds unless the contention ratio is low by virtue of it being late at night or early morning when people are at work.

Some handsets are limited by the chipset as to the maximum throughput they can attain (for instance my Vario 2 can only do 1.2Mbps theoretical max but in reality it'll do a meg solid), the network'll be getting its 3.6mbps upgrade circa Q3 2008 but it's 1.8mbps until then, the USB dongle 3G transceivers you get with WNW+ will theoretically top out the network speed just fine until then.

[bsrjl1]

No ChristopherW, HSDPA doesn't work like that although a normal/data call does. HSDPA is dedicated to a WCELL & the phone only listens to one HSDPA-SC, and to handover you have to hard handover onto the new H-SC with a short gap in data flow.

[Andyroo]

I have heard that the way it works is whereby it pulls in signals from different masts, or is it just a straightforward signal to the handset?

[bsrjl1]

http://www.umtschips.com/download_library/pdf/hsdpa_downlink_wp_12-04.pdf

Unlike R’99, HSDPA does not use soft handover. Instead, a hard handover algorithm has been proposed to switch between Node Bs because it was simple to support. The UE continuously monitors all the Node Bs in its active set and reports to UTRAN when a change in the best cell occurs. The UTRAN would then re-configure the serving HS-DSCH cell using either synchronous
(provides shortest service interruption) or asynchronous (provides shortest handover time) re-configurations.

[ChristopherW]

Well, call me corrected then! Thanks for the updated info :) gonna have to go off and grumble at the T-Mobile tech who told me that then because I've been misinformed. :rolleyes:

[Andyroo]

who cares, as long as it works!!!!!

[ChristopherW]

I care, because I'm far too nerdy to just be content with having a device that works, I need to know to the best of my ability why it works how it works if you get me :rolleyes:

[Andyroo]

there is no benefit to you in knowing how HSDPA works is there?

[[1]Player]

I don't understand how it works and I work in TMUK network operations. :)

[Andyroo]

its magic!

[ChristopherW]

Player;336926']I don't understand how it works and I work in TMUK network operations. :)

Absolutely disgraceful, total lack of respect for customers, awful customer service, I want my money back etc etc etc.



:rolleyes:

[T-Mobile Tech]

Another thing that will limit the bandwidth that you have is that most node Bs are only connected by a single 2Mbit connection be it via BT Leased Line or Microwave radio, we are however putting more than one 2Mbit connection in to the sites, but the more users there are on a single node B the slower your connection will be. We will be in the not to distant future be putting in BT ADSL to the node Bs to carry the data traffic back to the switches.

[[1]Player]

and in case people missed it, there's this to look forward to as well...

http://www.btplc.com/News/Articles/Showarticle.cfm?ArticleID=d77e7a53-3afa-4980-bb07-ebf027b87cdc

[Andyroo]

Player;341103']and in case people missed it, there's this to look forward to as well...

http://www.btplc.com/News/Articles/Showarticle.cfm?ArticleID=d77e7a53-3afa-4980-bb07-ebf027b87cdc

this is when tmobile will begin to go down the pan will faulty connections and the old "someone cut a cable in the street" scenario.

(yawn)

[dragon2611]

this is when tmobile will begin to go down the pan will faulty connections and the old "someone cut a cable in the street" scenario.

(yawn)

And what's stopping the "someone cut the cable in the street" scenario from occurring currently?

The traffic has to get to/from the mast somehow and that's most likely to be via a cable, nothing to stop some idiot from digging though it.....