Hi all,
I've got the following problem with my XDA Diamond (O2 Germany).
- To establish a connection, first the 3G connection is enabled. After the 3G connection is up, it switches to HSDPA ("H" icon).
- Now everything works fine, no latencies and fine transfer speed.
- After a certain idle time (surfing...), the H disappears again and is exchanged by the 3G.
- When I try to download data again, it switches back to "H".
=> Then, huge latencies occur (up to 1 min. before data are received), the connection speed slows down dramatically or no more data is received at all.
I first thought of issues with my ROM (Bepe 0.99) or my RadioROM (.05). But after flashing to Aztor V7 and RadioROM .08, I'm afraid I have hardware troubles as the problem persists.
Now my questions: Did anybody here have the same problem? If yes, could you fix it? If yes, how? ;-)
Would be nice if you could help me. It would be really annoying to RMA the device...
Thanks for your help in advance!
Regards,
eypostel
That could be because you device disconnected from the net (thus it switched from H to 3G), and it take time for it to reconnect to the net.
Thanks for your hint, but I think this behaviour is not normal...
Even the connection cold start (establishing 3G connection, then switch to HSDPA) is faster and before, the connection was working fine:
When in 3G mode the connection was required, the icon changed to "H" within one second, and the data transfer started immediately.
Now, it takes about ~30 s before the first life sign, and then data reception is not even guaranteed.
Regards,
eypostel
Please look here -> http://www.ppc-welt.info/community/showthread.php?t=132807
Thx prodigy7, this topic exactly describes my problem...
I have a question regarding this HSDPA idle bug. Turning off HSDPA should bring relief, but my MDA Compact IV does not have the HSDPA-switch. Can anybody have a look in their registry which values are changed when HSDPA is switched off on an XDA or HTC device?
It is easy, simply save a copy of the registry with PHM RegEditor before and after the change. Then compare both files with a file comparison editor (PSPad or TotalCommander for desktop PCs does the job).
This is so ridiculous... I have bought a HSDPA-device (Touch Pro) because I wanted to use HSDPA a lot... and it doesn't work at all... this was my first and last HTC device... I have invested 600€ for a piece of crap.
The Diamond does HSDPA just great, however your service provider must support it. In the UK T-Mobile supports it on their Web 'n' walk Plus and Max services. If you have normal web 'n' walk you can see the H and connect using HSDPA but its throttled.
Nothing to do with the device, just the service provider. It also depends on coverage. For example, when at home I get a H with 2 bars. When driving to work I loose that and get 3G and then eventually just G. Because my provider doesnt have HSDPA coverage where I work.
To turn HSDPA on and off easily use a cooked rom, i use Duttys. Very close to the original and tweaked just a little.
Did you read the german thread linked above? I guess not because what you wrote is wrong.
It is correct that the problem only exists if you use htc devices in the O2-HSDPA-Network. But: the problem only exists with HTC-devices in the O2-network. I am able to use any other (non-HTC) phone that supports HSDPA with the same sim-card successfully in the O2-network. And I am also able to surf using HSDPA with my HSPDA-Surfstick in the O2-HSDPA-Network. This means: the problem is not the network, it is the device (=HTC).
Modopo.com said:
means: the problem is not the network, it is the device (=HTC).
Click to expand...
Click to collapse
If it was that simple then none of us would be able to use HSDPA on our TD, but most of us can. I can use it on my TD on Orange in the UK and other networks including O2 when I am roaming in Europe and, for that matter South Africa (not sure about Germany). So the problems probably lies with the interaction between them, rather than solely the "fault" of one or other.
Seriously, sometimes people can be a bit absurd. 3G & HSDPA are standardized communication protocols. This means that there can be little (no?) device-to-device OR network-to-network variation with regards to the integral working of 3G. The context and application might vary and impact performance, though. For instance if a device is not supplying enough power to its 3G chip, signal acquisition might be slow and strength weak.
Modopo.com said:
the problem only exists with HTC-devices in the O2-network.
Click to expand...
Click to collapse
I highly doubt the existence of a bug limited to a single network and device brand. By the way the Qualcom chipsets (which incl. the 'radio chip') are not specific to HTC and many companies (incl. Kyocera, Motorola, Sharp, Sanyo, LG and Samsung) feature them. The specific Diamond Qualcomm chipset (MSM720xA) also features in the G1, Xperia, Motorola Atilla & Alexander, LG Incite and MANY others.
Modopo.com said:
I am able to use any other (non-HTC) phone that supports HSDPA with the same sim-card successfully in the O2-network.
Click to expand...
Click to collapse
I seriously doubt that. To prove this, you would need to test EVERY single 3G phone that has ever existed with the network. Which is, quite frankly, impossible.
Like I mentioned earlier (ct. 1st paragraph) context and application might influence performance. Maybe you're just not in an area with sufficient coverage, maybe your specific device has a design flaw or malfunction. Whatever the problem is, I'm pretty damn sure that it's not "HTC-devices don't work on O2".
I use the german o2 internet pack L and I have the same problem. Seems to be an o2 issue.
TerianSilva said:
I use the german o2 internet pack L and I have the same problem. Seems to be an o2 issue.
Click to expand...
Click to collapse
That is a much more feasible scenario. Any other O2 users have this problem?
I totally agree with H3x. You say the problem is only HTC devices on O2 so therefore its a device problem. but surely as the problem only exists on O2 its an O2 problem? Every other network in the world seems to be fine. Did you test any other devices with your SIM and network or are you just reading whats on the internet and taking it as true. As we all know, the interwebs is never wrong.
But, your obviously not happy with your diamond so throw it away, go and buy a nokia.
dannyoneill said:
Did you test any other devices with your SIM and network or are you just reading whats on the internet and taking it as true.
Click to expand...
Click to collapse
Seems like the HTC-homies in this forum are not willing to read what I wrote before and keep asking the same stuff again and again. I mean, I wrote in the previous linked post all details that you are asking again here...
I'm outta here and will keep at the german forums where people are not constantly trying to convince me that I am stupid...
H3x said:
I highly doubt the existence of a bug limited to a single network and device brand.
Click to expand...
Click to collapse
You're right of course. The bug mentioned here is not limited to a single brand nor a single network. But it seems to be limited to specific Qualcomm chipsets. According to numerous reports in German user boards all (?) devices using MSM7501A (HTC Touch Diamond, Touch Pro), MSM7200A (SE Xperia X1) and MSM7201A (HTC Touch HD) have trouble reconnecting from HSDPA-idle in German O2 network. Doing some research on the web I found similar reports from Swiss Orange users.
From my experience as a German O2 user: An idle HSDPA connection switches back from "H" to "3G" after 25 seconds. If you then send a new request, e.g. tapping a link in your browser, the connection indicator of your device changes to "H" again, but most of the time the connection hang up. You have to manually disconnect and reconnect... Switching off HSDPA/HSUPA gives you a stable 3G connect, however limited to basic 3G speed. Another workaround is to frequently ping around, a 10 to 15 second intervall does the job. With pushmail or some IM messenger active it may work, too.
That's my experience with the SE Xperia. And it's definitely not a local network issue nor temporary - I'm using a Palm Treo pro, too, without any problems at all. AFAIK the Palm also is a HTC device running on a Qualcomm chipset, the MSM7201 without an "A".
Regards,
joschi
Related
Hello All,
I have a problem with my kaiser, it started i think 2 weeks ago. I have vodafone (netherlands) with a data connection account (hsdpa). Now is the problem that i can't use umts (3g) or hspda. The only thing i can use is gprs. It looks like the modem or something is broken. But that is a kind of weird because (if i understand correctly) its al the same chip (wifi and so on). When i open internet explorer it begins to connect a gprs, 3g data connection. But it can't connect, than you can see a X by the synchronisation arrows (on the top of the screen). And after a few secconds it comes with a message that with the current settings there can't be a data connection. But if seen other messages as well ( the modem on the other side disconnected the connection) The weird thing is that i tried my sim card in my friends kaiser there it works fine, so it have to be my kaiser.
Ok what i tried:
I have a dutch htc kaiser (not vodafone branded or anything)
I use the latest dutty rom, but i tried the orriginal rom and different roms to see if the problem was the rom or something.
When i let the 3g mode on i can see that the phone finds a 3g connection (to call over umts).
Is there any program or tool or something so i can test the modem?
Or does anyone know a sollution for me, i will be very greatfull!!
Ok i tried a other radio to, maybe this was the problem. But it didn't, at this moment i have the default htc dutch rom (who was on the phone when i got it). I searched the net for the same problems, what i found was that this error could be happening when you have your wifi connection open, but i have wifi disabled. The phone is still receiving a 3G connection, but after a few secconds the 3G icon is gone and the failed synchronisation icon (two arrows with an X) is visible. than you can see that the phone is reconnecting. and then if i want to connect to the internet the same story as above is happening.
When i search internet i couldn't find an tool to test the chip/modem.
Because i have it spl unlocked i can't return it for rma, is it posible to restore the default spl?
Hi,
unfortunately I have the same problem with my Kaiser. I have an unbranded German version and it worked fine with all bands (GPRS, EDGE, UMTS(3G) and HSDPA) but since two weeks ago its only working with GPRS and EDGE mode. I have to change band-selection from AUTO to GSM in order to make or receive any calls.
I didn't do any ROM flashing, everything remains the same as the device was shipped.
I assume, that something is damaged but I have no idea how it could happen or how I can find out exactly what is causing the problem.
Since there is still warranty I'll return my Kaiser soon.
seems to be a widening problem
hi,
it seems many have the same issue, see my other posts for linkage to some other threads on it...no solution yet as far as I can tell.
rich
p.s. moderators any chance to link these threads and make a sticky?
ok, thanks for your reply. I've allready found another thread for that issue. But im still uncertain if its a bug in my device or a combination of a bug with a provider specific (Tmob Germany) problem or if its only the provider to blame for??
Chris
I have a slightly different problem. I don't have 3G in my area but only EDGE. Now the problem is that I cannot get speeds higher than about 80 kbs with EDGE.
Now when I put the same SIM in my Touch I can get speeds upto 200 kbs. So obviously this is not a problem of my service provider but rather something wrong with the device.
I have repeated the trial by swapping SIMs a number of times but with similar results all the time. Really don't know of a solution. Will appreciate any help.
haven't seen the edge problem
hi,
my edge speeds seem to vary more by location...I measure up to 200+kbs but have seen it go much lower too. there is a location where I can still get 3G working and i measured up to 1.7mbs for downloading! At my home location it is sporadic edge only and I can't even always get to speakeasy.com to test it, sometimes the speedtest says its not licensed..switching to wifi and it works. My guess is some needed ports are getting blocked by at&t at times..because sometimes it works. I brought all this up with at&t..they are taking some charges off this month and switched me to a cheaper plan too...so they at least seem to care even if they can't quite fix things yet.
rich
Firstly, let me thank everyone who does all the SUPERB work on this site, developing software, ROMs, and tools that us normal users would otherwise never see...
Here's my problem:
I got a Kaiser with the shipping AT&T ROM on it - I'm in the US.
I wanted to get rid of the bloatware and other crap that AT&T puts on the device, and take it back to an HTC ROM.
The problem is, I can only connect to the EDGE network, and I'm only getting 40-60k transfers - I know that with my Samsung Sync (my previous phone) I was getting 1.3-1.5Mbps using the same site to test (http://text.dslreports.com/mspeed)
Is this a limitation within the HTC ROM? If so, does anyone know if newer HTC ROM's (perhaps even with WM6.1) will fix this problem, or do I HAVE to use an AT&T ROM to access the 3G (HSPDA) network in the US?
Thanks in advance for your time!!!
Do you see the icon 3G and it changes to H once you're accessing the internet? If no, you might want to check if you correctly config the connection.
I myself don't trust http://text.dslreports.com/mspeed when it runs on PIE web browser. I did the benchmark on 2 different types of connection, at&t HSDPA and Verizon FiOS* Wifi, and it comes up nearly the same speed 1.3-1.5Mbps.
*I have 15 Mbps download package.
Yes, it DOES do that (Mr President...lol)
What site do you prefer to test the speed of your 3G connection? I was hoping to use Speedtest.net, but doubt that they support mobile.
So, I guess that you're saying my connection is probably just fine, but that the site is problematic?
Thanks for the quick reply, btw!!
- Mark
I don't pay attention too much on speed. But, there are many ways to confirm that you're connected to 3G network.
If the answer is yes for any question below, then you're 3G.
a. Tethering internet via your PC on "internet sharing" mode and make a call at the same time.
b. Stream any audio broadcast with bitrate above 196Kbps.
Enjoy.
Um, where do you live? Pretty much only the major cities have 3G deployed, and even then, it's no guarantee. I live in Minneapolis where 3G was rolled out last November.
Lidberg said:
Um, where do you live? Pretty much only the major cities have 3G deployed, and even then, it's no guarantee. I live in Minneapolis where 3G was rolled out last November.
Click to expand...
Click to collapse
I'm in Pittsburgh - I know for certain that I'm in 3G territory, as I just got the Kaiser a few weeks ago, and before that, was using a Samsung Sync tethered to my laptop, and getting 1.3 - 1.5 MBps....
UPDATE
Must have had a lousy signal where I was trying it before - I tried it again, using the same site, and was getting 500-600k - so I guess it's hitting the 3G network, but for some reason, changing the 3G icon to an H, presumably indicating HSPDA.
All's well...can one of the mod's please lock this thread? Thanks!
- Mark
I have this weird problem with data connections. I couldn't find anything simular to this on the forum.
My provider (vodafone NL) does supports umts & 3G, I got a full data subscription, and the area i'm in is fully covered.
Now if I go to Settings - Phone - Band there are 2 different settings you can tweak; 'Network Type' and 'GSM/UMTS Band'. Those are standard set to 'Auto'. With those settings my phone says it has 3G connection (above the indicator bars and an icon), but i can't make any calls or get any data from the network. sometimes it also says the server ended the connection, but it still remains connected.
If I set Network Type to GSM, I can make calls, but only connect trough gprs wich is waaaaay to slow for me.
Setting it to WCDMA won't give me a connection at all. Turning HSDPA on or of doesn't make any difference also.
I figured updating my ROM would fix this, but it didn't. I tried different roms.
Is this a known problem, and more important, is there a fix for this ? It is driving me crazy !!
little more info;
ROM version : dutty's WM6.1 WWE
Radio version : 1.64.08.21
Protocol version : 25.74.40.02H
HTC branded Tytn II
Any advice is very welcome !!
Thanks in advance
i keep mine on auto but use bandswitch to switch between edge and 3g or some people gprs to 3g,sounds like a proxy issue since u wouldnt make calls on the wrong band,gsm works for calls so that part must be right so it has to be your internet settings and/or proxy
I checked the (proxy) settings on the website of my provider, and it seems to be okay. Those are settings for gprs tough, but it seems to me it should work as well for umts. It are also the settings the device initialy chooses for my provider..
I was thinking, might a radio update do the trick...? I did read somewhere that has to do with connections..
not necessarily, radios are more so driver issues for hardware such as gps,bluetooth,wifi,keyboards and cameras. i highly doubt another radio could fix this one since i never came across this with any combo of rom and radio before
Well then I don't know anymore what to do. It is probably a hardware related problem so I'll have to make a phonecall to HTC.
Thanks for the advice dyetheskin !
If someone does have a solution... still happier to get it fixed myself !
Crybaby84 said:
Well then I don't know anymore what to do. It is probably a hardware related problem so I'll have to make a phonecall to HTC.
Thanks for the advice dyetheskin !
If someone does have a solution... still happier to get it fixed myself !
Click to expand...
Click to collapse
I am having the same issue.
More wierd is that it used to work perfectly in the beginning and couple of days ago it started acting like this.
I called my mobile provider thinking it might be USIM problem, however it wasn't.
Now I also think it's a HW problem. Next week I'll take it to a lab and hopefully it will be an easy solution.
I called HTC Tech support 2 weeks ago, and they confirmed it was a hardware related problem. They had 2 simular cases before..
Well, at least they will repair it for free
Hi all,
I am using my Diamond on the UK Orange network and am having constant problems with the data connectivity over GRPS/3G. I have the phone synced to our Exchange server and also have an IMAP email account. It is set to use push but I often find the active sync in "waiting for network" mode rather than connected. If I keep hitting "sync", it will eventually connect and get my mail. I also find frequently that Opera times out and my IMAP mails fails saying it cannot "connect to server". Other times I can see the data connection restart or just go missing. I thought it was just my handset but after looking at a few collegues with Diamoinds, also on Orange, they seem to have similar issues. I'm going to bring this up with Orange but wanted to see if anyone had any ideas.
We are all running the official Orange 1.93 Rom. (With us having replacement insurance I am not keep on flashing a non official ROM via HARDSPL. I've had four Diamond already due to various faults!)
Any advice would be appreciated. data is a business critivcal function for us and currently either Orange or the Diamond are letting us down.
Thanks!
Steve
stevebuk said:
Hi all,
I am using my Diamond on the UK Orange network and am having constant problems with the data connectivity over GRPS/3G. I have the phone synced to our Exchange server and also have an IMAP email account. It is set to use push but I often find the active sync in "waiting for network" mode rather than connected. If I keep hitting "sync", it will eventually connect and get my mail. I also find frequently that Opera times out and my IMAP mails fails saying it cannot "connect to server". Other times I can see the data connection restart or just go missing. I thought it was just my handset but after looking at a few collegues with Diamoinds, also on Orange, they seem to have similar issues. I'm going to bring this up with Orange but wanted to see if anyone had any ideas.
We are all running the official Orange 1.93 Rom. (With us having replacement insurance I am not keep on flashing a non official ROM via HARDSPL. I've had four Diamond already due to various faults!)
Any advice would be appreciated. data is a business critivcal function for us and currently either Orange or the Diamond are letting us down.
Thanks!
Steve
Click to expand...
Click to collapse
Hi i am on orange in nottingham and i am having the same problem i am running a offical HTC rom 1.93 and i cannot get online just keeps cutting out the data connection, if you call orange and get an answer please PM me as i need this fixing cos its getting bad now no internet on my diamond
Thanks
YIPPY me 3!! i thought it was just me with 3G problems!!
i'm also having issues making video calls and surfing the www via the 3G on orange i have looked and looked for settings concerning 3G and it's coverage and i'm drawing a blank.
i've called orange too and was told there should be no reasons as to why i'm having so many problems with it, as all things were normal and correct as far as they could tell and my location nottingham has 3G masts all over infact i was in the middle of 3.
i was wondering what effect changing the network type would have from auto to GSM/WCDMA and changing the GSM/UMTS band from auto to one of the others listed (too lazy to type them all out )
are there any tweek tools out there which can booost the signal reception?? it does my nut in to see the 3G icon flash up and disappear as soon as i try to use any of the 3G functions..
I've been getting this problem the last week or so too. Very odd as it used to work perfectly.
nlnasty said:
YIPPY me 3!! i thought it was just me with 3G problems!!
i'm also having issues making video calls and surfing the www via the 3G on orange i have looked and looked for settings concerning 3G and it's coverage and i'm drawing a blank.
i've called orange too and was told there should be no reasons as to why i'm having so many problems with it, as all things were normal and correct as far as they could tell and my location nottingham has 3G masts all over infact i was in the middle of 3.
i was wondering what effect changing the network type would have from auto to GSM/WCDMA and changing the GSM/UMTS band from auto to one of the others listed (too lazy to type them all out )
are there any tweek tools out there which can booost the signal reception?? it does my nut in to see the 3G icon flash up and disappear as soon as i try to use any of the 3G functions..
Click to expand...
Click to collapse
i would say that it is an orange problem and them being them dont want to admit it cos it would proberly cost them customers and money
Problem with Diamond GPRS
Hello all,
I live in Tehran, Iran and I use Irancell network operator.
GPRS is available in this network and I could use it on my old cell phones such as SonyEricsson W810 and Nokia N81. But now I have HTC Touch Diamond and when I try to connect it to GPRS it tooks a long time to connect, showing "Connecting" but after a while it cannot connect!
Everything is OK, all settings, etc. I called Irancell but they say your phone is not compatible our network!
I think there must be a way to use this networks GRPS on my Diamond!
The first reason that made my buy this cell phone was its Internet capabilities...
and I know this networks use the same settings as South Africa Network Operator.
If anyone can help, please tell me.
Thanks.
Sounds more like a network problem than a handset problem imo. I hope I am not tempting fate but I have not had any problems with data connections on UK T-mobile. That said, I get a weaker signal than I do on my old MDA Compact III handset so I think part of the problem could be the internal aerial
The bottom line for me is that the Diamond is a good but flawed phone. ****e battery life and too clever, compact, aestheticaly pleasing for its own good
You get a very quick GPS fix for Google maps and sat nag though
Apologies for going off at a tangent
I'm on Orange, also in Nottingham and have been having this problem for the last week or so too.
Must be a network problem. I have to tap on the "H" connection icon, tap Disconnect and try again.
Edit:
Viffer800 said:
...The bottom line for me is that the Diamond is a good but flawed phone. ****e battery life and too clever, compact, aestheticaly pleasing for its own good
You get a very quick GPS fix for Google maps and sat nag though
Apologies for going off at a tangent
Click to expand...
Click to collapse
I agree that it's flawed, the biggest problem being battery life. The next biggest problem is that TF3D seems to be incredibly poor and half-finished. My solution is not to use it, that way you have a normal old-style WM phone but smaller, sleeker and faster with a VGA screen. HTH
Im all good here
nlnasty said:
YIPPY me 3!! i thought it was just me with 3G problems!!
i'm also having issues making video calls and surfing the www via the 3G on orange i have looked and looked for settings concerning 3G and it's coverage and i'm drawing a blank.
i've called orange too and was told there should be no reasons as to why i'm having so many problems with it, as all things were normal and correct as far as they could tell and my location nottingham has 3G masts all over infact i was in the middle of 3.
i was wondering what effect changing the network type would have from auto to GSM/WCDMA and changing the GSM/UMTS band from auto to one of the others listed (too lazy to type them all out )
are there any tweek tools out there which can booost the signal reception?? it does my nut in to see the 3G icon flash up and disappear as soon as i try to use any of the 3G functions..
Click to expand...
Click to collapse
I have a orange Diamond and live in cheshire, i have never had one problem with connecting to data services, always get a strong signal.
My phone is running duttys rom 2.3a (there are newer virsions, time of writing 2.7rc2) and the latest radio BS14, That radio is very quick at switching from Gprs, 3G and HSDPA, it has also increased my signal strenth a tad. its worth looking at that.Other than changing these, knowing orange it could be there network, it happens from time to time.
i have considered flashing my phone with a new ROM but since i've never done this type of thing before, i'm worried i'll end up creating a nice looking paper weight and with all the ROM's out there how do know which is best??
wrong answer edit.
Is there a way to force HSDPA? I have it enabled (using advance config) & rarely does it connect to it, uses Edge majority of the time.
if the place you are present have poor hsdpa support it
roam to other network types
would you rather have it loose connection ?
+1 on what Rudegar sad, also its BTS who decide for you when HSDPA should kick in. If you are in area you will recieve.
So theres no way to force the connection?
I had three bars earlier when connection & worked awsome, now Im on edge & fights to get 10kbps down. Ive noticed this in the cities Im in often like Roanoke,VA, Atlanta, Montgomery,AL, Virginia Beach, Detroit.
cptnslow said:
So theres no way to force the connection?
Click to expand...
Click to collapse
It's just like if you have a 56 kbps modem - remember those antiques from only 10 years ago - there's no way to force a higher connection speed without unreliability and connection drops coming into the equation. Maybe it's time to trial another network (perhaps with a pay as you go sim) and see how their offerings compare.
Where in Va Beach? I live in Va Beach and get HSDPA pretty much everywhere i go.
ProudPop83 said:
Where in Va Beach? I live in Va Beach and get HSDPA pretty much everywhere i go.
Click to expand...
Click to collapse
Like I stated above its the base station who opens up for you when you download or stream. You are not in HSDPA constantly as it does not enable until you do the above.
raiisak said:
Like I stated above its the base station who opens up for you when you download or stream. You are not in HSDPA constantly as it does not enable until you do the above.
Click to expand...
Click to collapse
]I think that'll be very network provider dependent because where I live its always HSDPA irrespective of whether a data connection is present. Depending where I travel to, I have had cases where the connection drops to 3G but then as soon as I initiate a data connection it jumps up to H and I've had further cases where it's E or G and a data connection makes no difference.
Flying Kiwi said:
]I think that'll be very network provider dependent because where I live its always HSDPA irrespective of whether a data connection is present. Depending where I travel to, I have had cases where the connection drops to 3G but then as soon as I initiate a data connection it jumps up to H and I've had further cases where it's E or G and a data connection makes no difference.
Click to expand...
Click to collapse
http://en.wikipedia.org/wiki/HSDPA
Fast packet scheduling
The HS-DSCH downlink channel is shared between users using channel-dependent scheduling to make the best use of available radio conditions. Each user device periodically transmits an indication of the downlink signal quality, as often as 500 times per second. Using this information from all devices, the base station decides which users will be sent data on the next 2 ms frame and how much data should be sent for each user. More data can be sent to users which report high downlink signal quality.
The amount of the channelisation code tree, and thus network bandwidth, allocated to HSDPA users is determined by the network. The allocation is "semi-static" in that it can be modified while the network is operating, but not on a frame-by-frame basis. This allocation represents a trade-off between bandwidth allocated for HSDPA users, versus that for voice and non-HSDPA data users. The allocation is in units of channelisation codes for Spreading Factor 16, of which 16 exist and up to 15 can be allocated to HSDPA. When the base station decides which users will receive data on the next frame, it also decides which channelisation codes will be used for each user. This information is sent to the user devices over one or more HSDPA "scheduling channels"; these channels are not part of the HSDPA allocation previously mentioned, but are allocated separately. Thus, for a given 2 ms frame, data may be sent to a number of users simultaneously, using different channelisation codes. The maximum number of users to receive data on a given 2 ms frame is determined by the number of allocated channelisation codes. By contrast, in CDMA2000 1xEV-DO, data is sent to only one user at a time.
Click to expand...
Click to collapse
raiisak said:
http://en.wikipedia.org/wiki/HSDPA
Click to expand...
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I was actually looking at that page a few days ago with regards to speeds but it doesn't change the fact that in some locations my phone shows the H icon when there isn't even a hint of a data connection present and no voice call taking place at the time either. Under such circumstances, it could have quite easily dropped back to a 3G icon until HSDPA is needed but it nearly always doesn't. The only place I've found it does work like this, interestingly enough, is when I'm going past the O2 UK HQ beside Slough train station where it will drop back to 3 G unless a data connection is in place.
When I was using Vodafone UK, this did not happen in the same loacation (never tested for this near their HQ out at Newbury) but again I experienced many cases where the H icon was shown on the phone but not needed. Thats why I've mentioned it's network dependant. I take your point that the specs dictate it should work otherwise but in my case thats not played out to be how it's gone.
If you want I can make your icon show a Q or Z for that matter, 3G as ONE a connection is a misleading term as it describes many technologies. Normal HSDPA suppose to show H when used and 3G idling. Remember the 6.1 ROM`s who displayed H all the time HSDPA or not? If you read up on wiki you will understand what I sad about HSDPA in earlier post. You cant draw conclusions based on what icon your phone is showing as the HSDPA technology will work as it always has.
So as long you do not stream/call of use for HSDPA you will not stay in it. So if you going to force it to stay in HSDPA you need to constant stream, an idle HSDPA connection swich over to 3g and back once called upon. So correct me if I am wrong here ... And I preferred documented. The only thing that is provider dependent here are if they support it and the coverage of it. The technology which I was talking about has nothing to do whit just that.
Flying Kiwi said:
I was actually looking at that page a few days ago with regards to speeds but it doesn't change the fact that in some locations my phone shows the H icon when there isn't even a hint of a data connection present and no voice call taking place at the time either. Under such circumstances, it could have quite easily dropped back to a 3G icon until HSDPA is needed but it nearly always doesn't. The only place I've found it does work like this, interestingly enough, is when I'm going past the O2 UK HQ beside Slough train station where it will drop back to 3 G unless a data connection is in place.
When I was using Vodafone UK, this did not happen in the same loacation (never tested for this near their HQ out at Newbury) but again I experienced many cases where the H icon was shown on the phone but not needed. Thats why I've mentioned it's network dependant. I take your point that the specs dictate it should work otherwise but in my case thats not played out to be how it's gone.
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raiisak said:
You cant draw conclusions based on what icon your phone is showing as the HSDPA technology will work as it always has.
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Why would my phone lie to me like that given (in the same locations) it reliably and correctly detects that it is in 3G and then when a data connection is initiated bumps up to H. There is no doubt to me that it is reliably detecting the connection type as it does this every time I travel through Slough on the train if I initiate a data connection. Similarly it seems as if the H, 3G, G and even E, do correctly display under the right circumstances. Again, I've no dobt about the HSDPA specs and how it should work, I'm just saying in reality with my HTC Official ROM'd phone (both using my current setup and previously WM 6.1), it's behaved that way in practice.
I think the OP wants the same sort of performance and indications from his phone that I'm getting from mine and I know no way to 'force' an HSDPA connection and get appropriate speeds if the network infrastructure and signal strenth aren't up to the task. On the other hand there maybe another network that operates much better in a given area which will provide whats required and there's little cost in doing some 'trialling' of competing networks in the areas involved.
Raiisak said:
You cant draw conclusions based on what icon your phone is showing as the HSDPA technology will work as it always has.
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Flying Kiwi said:
Why would my phone lie to me like that given.........
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Listen mate, I dont know why you want to argue or what you want to argue about???? Twisting and turning my answers are not going to do the trick here, OP asked about forcing he`s device in HSDPA, I answered that it would not work cause HSDPA does not work like that. Then you come in and start talking about something completely else and nagging on my answer?? I do not care what your phone shows and how it work in local area`s nearby you as it has nothing whit my answer or on topic IMO to do.
Raiisak said:
Like I stated above its the base station who opens up for you when you download or stream. You are not in HSDPA constantly as it does not enable until you do the above.
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Flying Kiwi said:
]I think that'll be very network provider dependent because where I live its always HSDPA irrespective of whether a data connection is present. Depending where I travel to, I have had cases where the connection drops to 3G but then as soon as I initiate a data connection it jumps up to H and I've had further cases where it's E or G and a data connection makes no difference.
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This comment triggered it all, if I had knew that you would not be interested in my answers on your comment I would not have taken the time to explain about HSDPA.
Flying Kiwi said:
I know no way to 'force' an HSDPA connection
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Then what do you argue about here? I am not going to comment this further as what ever I say does not get to you and there is nothing to more discuss.
Nothing personal
raiisak said:
Listen mate, I dont know why you want to argue or what you want to argue about???? Twisting and turning my answers are not going to do the trick here, OP asked about forcing he`s device in HSDPA, I answered that it would not work cause HSDPA does not work like that.
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There's no need to bring out the 'listen mate' with multiple questionmarks on the end. I do listen where I think something is clear and correct. If I think there's more to an issue, I chime in. In response to your link to that wikipedia page which outlines how it should work (in an ideal world), I'm telling you that some networks do not appear to implement things according to the official specs so it won't necessarily behave that way. My examples based from usage/observations in many different locations around the UK prove that point and as I mentioned that was also the case when I was with Vodafone here so that's all, no more, no less and no intention to offend.
Then you come in and start talking about something completely else and nagging on my answer?? I do not care what your phone shows and how it work in local area`s nearby you as it has nothing whit my answer or on topic IMO to do.
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There's those multiple questionmarks again, calm down, I'm not having a go at you. I think it's best for the OP to make that determination whether my comments are relevant as we both replied in order to try and help that person out. You with some might say the 'official' line and me with the 'in practice' line. In the end we agree the answer as to what can be done to force HSDPA is the same ie nothing. I added the possibility that if better performance is saught, a network change may provide this.
This comment triggered it all, if I had knew that you would not be interested in my answers on your comment I would not have taken the time to explain about HSDPA.
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I was interested all right, I felt your original answer and the subsequent wikipedia link didn't paint the whole picture so that's why I came in. I trust that you will eventually understand and accept that. Remember, I'm not having a go at you