What is HSDPA & AGPS? - Tilt, TyTN II, MDA Vario III General

I recently installed the eOS 4.888.FiRe ROM on my Tilt and it has been working nicely. I noticed some additional settings that weren't available to me when I was using the stock HTC ROM. What is "HSDPA" and "AGPS"? And will it cost me to leave these turned on? I notice when I turn on HSDPA, I see a an "H" icon at the top rather than the usual "3G" icon.

nathanofseattle said:
I recently installed the eOS 4.888.FiRe ROM on my Tilt and it has been working nicely. I noticed some additional settings that weren't available to me when I was using the stock HTC ROM. What is "HSDPA" and "AGPS"? And will it cost me to leave these turned on? I notice when I turn on HSDPA, I see a an "H" icon at the top rather than the usual "3G" icon.
Click to expand...
Click to collapse
what is google???
anyways simple answer:
hsdpa is a form of data connection which is faster than 3g.
agps stands for assisted gps. it is same as normal gps except that agps uses a server to cut down on the time to requires to get ur location using gps.
both won't cost u anything extra but ur carrier does need to support them for u to be able to use.

Thank you. I just wanted to know if they both won't cost me anything extra. You never know these days with Cellphone companies. I turned on both HSDPA and AGPS. So far my calls have been going through just fine and my navigation software continues to function normally.
How do I know if my carrier (AT&T) supports HSDPA and AGPS? I hate having to call customer service to ask so I'd rather ask here.

nathanofseattle said:
Thank you. I just wanted to know if they both won't cost me anything extra. You never know these days with Cellphone companies. I turned on both HSDPA and AGPS. So far my calls have been going through just fine and my navigation software continues to function normally.
How do I know if my carrier (AT&T) supports HSDPA and AGPS? I hate having to call customer service to ask so I'd rather ask here.
Click to expand...
Click to collapse
I used KaiserTweak to set my phone to HSDPA. I am an AT&T user. It's worked fine. No additional charges. I don't use AGPS so I can't respond to that part of your question.

theo44001 said:
I used KaiserTweak to set my phone to HSDPA. I am an AT&T user. It's worked fine. No additional charges. I don't use AGPS so I can't respond to that part of your question.
Click to expand...
Click to collapse
Thanks for your response. I just use it for voice calls anyway. Do you see any improvements? Or is it specifically if you subscribe to a data plan? And do you also see an "H" icon at the top rather than a "3G" icon?

nathanofseattle said:
Thanks for your response. I just use it for voice calls anyway. Do you see any improvements? Or is it specifically if you subscribe to a data plan? And do you also see an "H" icon at the top rather than a "3G" icon?
Click to expand...
Click to collapse
HSDPA has to do with you data connection, so unless you have a data plan you really won’t see the benefit.

thesire said:
what is google???
Click to expand...
Click to collapse
Google
n. company that was founded in 1998 at Stanford University by Larry Page and Sergey Brin and serves as a search engine on the Internet
x
google
v. (Computers) search for data on the Web using the search mechanism Google; search on the Internet for particulars relating to new or likely to be girlfriend or boyfriend

HSDPA doesn't cost anything to activate, but if you are on a restrictive tariff it is a lot easier to run up over usage charges.
In the UK you need to usually be paying at least £30 a month to have the unlimited mobile broadband and e-mail. I would personally check your contract before you let the HSDPA run loose.
Rob

As mentioned multiple times, neither HSDPA or AGPS will cost you anything. You will know if you are in an area that has HSDPA because of the H icon. If it goes back to 3G then ATT does not have HSDPA in that area. If it goes to E then you are back on Edge. As also was mentioned, neither of these have any impact on your phone calls. HDSPA = Data and AGPS = using the cell towers or the internet to help you lock on your GPS location quicker.
And yes, if you had used google to search for this you would have probably got a better explanation in a less amount of time.

Related

Cingular/ATT Users: HSPDA vs. 3G

Ok so i was messing around with the settings in Kaiser Tweak.. and i have found this..
3G does indeed go faster than HSPDA(aka 3.5G) on my network here in south florida..
In New York City it was the opposite..
another thing that i did notice was that in NY i can have simultaneous voice and data sessions open, but here in south florida i cannot
(ie. Tethering whilst on the phone, or surfing web while on hold...)
i was wondering wether u you all can have simultaneous voice and data, and where??
Colorado Springs, CO: Simultaneous voice and data.
I can do both voice and data simultaneously in Nashville, and was able to do so successfully when I was in various parts of Florida (except when I was roaming off of the Edge network, obviously).
Jacksonville, FL. works fine... might have just been an issue in NY, or you need a new sim then sim updates.
Jacksonville Fl here as well and I have had no issues... I can do it all simultaneous.... where in S. Fl are you?
im in palm beach county...when i go up to martin county simultaneous voice and data works fine..
im gonna gonna be going up there this weekend and checking it out while im there again.
I see that the 3G towers dont have much range, im guessing now that each one works differently.. I dont know if i should get a new radio.
cweems said:
Jacksonville, FL. works fine... might have just been an issue in NY, or you need a new sim then sim updates.
Click to expand...
Click to collapse
What would a new sim have to do with network speed?
sdlopez83 said:
What would a new sim have to do with network speed?
Click to expand...
Click to collapse
When I worked for ATT they had a training course on the new sim cards and it has to do with the available amount of memory on the chip and the downloads of the tower databases. Older non 3g sims have half the memory of the 3g sims and cannot hold the download that comes to your phone that tells it what towers to use. That was what Tom the network engineer in CFL had advised us of.
HSDPA in Philadelphia, PA is upwards of 1.8mbps. I frequently tether to my laptop and do not get disconnected if the phone rings. I am using the SIM that shipped with my Tilt.
Hey I'm in Palm Beach County too....Nice too see you here.... a quick question for you...do you notice a problem with MMS in Palm Beach County like I do... meaning a long delay in sending to someone not in the ATT spectrum???
Minneapolis - works simultaneous. Tested and verified many times =)
TurboX2 said:
Ok so i was messing around with the settings in Kaiser Tweak.. and i have found this..
3G does indeed go faster than HSPDA(aka 3.5G) on my network here in south florida..
In New York City it was the opposite..
another thing that i did notice was that in NY i can have simultaneous voice and data sessions open, but here in south florida i cannot
(ie. Tethering whilst on the phone, or surfing web while on hold...)
i was wondering wether u you all can have simultaneous voice and data, and where??
Click to expand...
Click to collapse
Maybe you simultaneous voice and data didn't work because you had the Kaiser Tweak setting "Disconnect Data Connection after" set to something other than "never" at the time you tried it. Simultaneous doesn't work if you have a disconnect timeout set.
Maryland Baltimore Area
3G and HSDPA
approx equal speeds ( 1.7mbps verified by multiple badwidth tests)
Able to both talk and surf regardless 3G or HSDPA
NotATreoFan said:
HSDPA in Philadelphia, PA is upwards of 1.8mbps. I frequently tether to my laptop and do not get disconnected if the phone rings. I am using the SIM that shipped with my Tilt.
Click to expand...
Click to collapse
I'm in delaware, and this is what happens to me. HOWEVER, it doesnt happen if i'm on the edge network, go figure.
ok heres my reviews .. ive done a bit of travelling with my wife and for my job since ive bought my Tilt so i got to see its performance in a few diffrent places.
-Where i live NJ = Fast ( switches between HSDPA and Edge all the time )
-NY = semi fast ( stayed on HSDPA )
-Chicago = slow ( Edge network Only )
London = SUPER FAST ( not only did it stay on HSDPA the entire time, i watched youtube vids and flipped thru them without and lag or choppy screens )
-Boston, around the New England Aquarium = Semi Fast, Edge and HSDPA )
so the way i feel, its alot faster than my Blackberry Curve, and blows my wifes iPhone out the water while on HSDPA. BUT while im on the EDGE network its pretty much at the same speed.
nimda0 said:
I'm in delaware, and this is what happens to me. HOWEVER, it doesnt happen if i'm on the edge network, go figure.
Click to expand...
Click to collapse
It's normal, EDGE doesn't support simultaneous call and data. 3G does.
ok im in southern california and i can do both data and voice BUT i have never maxed above 800 kbit on HSDPA..really lame but i dont know why
JstarLuvsTina said:
-Boston, around the New England Aquarium = Semi Fast, Edge and HSDPA )
and blows my wifes iPhone out the water while on HSDPA. BUT while im on the EDGE network its pretty much at the same speed.
Click to expand...
Click to collapse
I will attest to Boston and it's environs. I was connected yesterday during back and forth emails, when my wife called, so the simultaneous voice and data works also.
And yes, my wife was calling from her pokey slow iPhone
3G supports simultaneous voice and data and has always worked for me this way in Harrisburg PA on my Tytn II--- until recently.
I now cannot use data while on a voice call. I've tried resetting my data connections and modifying all my tweaks, but it is stuck this way. Has anyone seen this happen?
mskovrinskie said:
3G supports simultaneous voice and data and has always worked for me this way in Harrisburg PA on my Tytn II--- until recently.
I now cannot use data while on a voice call. I've tried resetting my data connections and modifying all my tweaks, but it is stuck this way. Has anyone seen this happen?
Click to expand...
Click to collapse
I hate it when I answer my own question.. I just found the fix for this: http://forum.xda-developers.com/showpost.php?p=2030937&postcount=11

HOWTO allow UMTS, HSDPA - Disable GPRS connection

Hallo friends, I'm a newbye here.
I've got a little big problem and I'm asking you to help me.
In Italy H3G, my mobile operator, sells one internet flat in UMTS and HSDPA mode. This is because H3G hasn't got GSM antennas and the roaming connection costs 2€/MB (3$).
Can I disable the gprs allowing the 3G and 3,5G only? I'm becoming crazy
Thanks to you all,
Dario
Phone, Menu, Options, Band, WCDMA/UMTS only.
unwired4 said:
Phone, Menu, Options, Band, WCDMA/UMTS only.
Click to expand...
Click to collapse
Thanks unwired4 but I need to recieve the GSM calls (they are free of charge).
I need only to block GPRS internet traffic. Any other suggestion?
Bye,
Dario,
modaco nodata.
my device is 2g only, but i'm pretty sure it has seperate connections for gprs/UMTS/HSDPA and whatnot
fzzyrn said:
modaco nodata.
my device is 2g only, but i'm pretty sure it has seperate connections for gprs/UMTS/HSDPA and whatnot
Click to expand...
Click to collapse
seems it doesn't have separated connections... :-(
I have the same problem
up! Really interesting! I have the same problem!
You cant block diff data based on GSM or WCDMA or (2.5G or 3G). I can see at the moment only option is to make it UMTS.
Thats a shame... been looking for a solution to this problem also. Due to the structure of the data packs on my carrier, blocking roaming data and allowing the rest would be the perfect application for many users to avoid excessive usage charges.
flux76 said:
Thats a shame... been looking for a solution to this problem also. Due to the structure of the data packs on my carrier, blocking roaming data and allowing the rest would be the perfect application for many users to avoid excessive usage charges.
Click to expand...
Click to collapse
I am in support for this project and willing to donate if someone will take up the task
ravsingh said:
I am in support for this project and willing to donate if someone will take up the task
Click to expand...
Click to collapse
I too.
I have also started using visual studio 2008. Any suggestion for create one ad-hoc application will be appreciated.
Hi all,
I'm another Italian H3G user and got the same issue!
I'm ready to donate together with others if anyone will pop out with a working solution for that project!!!
So what you guys are asking for as no-data when only when on GSM.
Since data is automatically part of the standard (as much as asking your hands to feel cold and not heat), it could be "interesting" to try to keep flipping it on off.
Closest behavior would be if you're on 3G voice call and it locks out data only when it flips to GSM.
I am guessing here, but something worth looking at for an example may be like the TF3D Weather. In Settings, it has an option to tick "Download Weather when roaming". As far as I know, if you don't tick this, it won't download when you are roaming, only when your on your home network.
So a similar feature for all data. In other words, don't download when on Roaming. At other times, ok to download.
flux76 said:
I am guessing here, but something worth looking at for an example may be like the TF3D Weather. In Settings, it has an option to tick "Download Weather when roaming". As far as I know, if you don't tick this, it won't download when you are roaming, only when your on your home network.
So a similar feature for all data. In other words, don't download when on Roaming. At other times, ok to download.
Click to expand...
Click to collapse
That's right.
flux76 said:
I am guessing here, but something worth looking at for an example may be like the TF3D Weather. In Settings, it has an option to tick "Download Weather when roaming". As far as I know, if you don't tick this, it won't download when you are roaming, only when your on your home network.
So a similar feature for all data. In other words, don't download when on Roaming. At other times, ok to download.
Click to expand...
Click to collapse
Great, Flux, you've got the exact point here!
BTW: I found an application -which does in effects many, many other useful things- but it can explain what we're looking for: phoneAlarm
It seems it can stop data connection depending on many parameters.
For our pourpose, it would be enough if data connection gets disabled when not connected to the home network!
UP!.......
lol i'm italian too and i have the same problem
andrea89g said:
lol i'm italian too and i have the same problem
Click to expand...
Click to collapse
phoneAlarm doesn't go. It doesn't block EDGE (2,5G gprs) traffic. :-(
ziotegolina said:
phoneAlarm doesn't go. It doesn't block EDGE (2,5G gprs) traffic. :-(
Click to expand...
Click to collapse
That's very strange!
If you lookk at the phoneAlarm product page (link) where the new v2.0 [build 278] features are described and search for the 7th element in the features list, you can read:
- Data completely disabled per profile (for roaming etc.)
This should mean that, when roaming, no data connection is made available and this is exactly what we need! (not paying for data roaming when H3G has no service and the phone swithes to TIM).
I thoutgh it worked...

HOWTO allow UMTS, HSDPA - Disable GPRS connection

Forgive me for cross-posting, BUT: it seems this is a REAL big issue for many users...
We're looking for a way (=tool/app) to disable GPRS data only in order to avoid roaming data connection costs (from 0,50 up to 2,00 euros/MB) while keeping the chance to connect to GSM networks (if needed) for roaming calls.
If anyone will pop out with a working solution for that issue, there's already a number of us ready to donate in order to contribute/reward the author(s)!
http://forum.xda-developers.com/showthread.php?t=419804
Why not just force it to 3G only?
NuShrike said:
Why not just force it to 3G only?
Click to expand...
Click to collapse
You're right (I was editing my original message), but it would be desirable to keep the chance to connect to GSM networks (if needed) for roaming calls otherwise we loose connection and voice calls functionality in areas serviced by TIM with which H3G has a roaming agreement...
Should not be a big issue to make something like that, however...
Why wouldn't HSDPA be available while roaming? I have HSDPA here while roaming as well... :/
Chainfire said:
Why wouldn't HSDPA be available while roaming? I have HSDPA here while roaming as well... :/
Click to expand...
Click to collapse
It very much depends on operators' agreements!
In Italy H3G has a "national" roaming agreement with TIM: whenever an H3G customer is out of H3G signal coverge, the phone is allowed to switch to the TIM network, BUT the only data connection available is GPRS, not UMTS/HSDPA!!!
This causes our phone bills get bigger and bigger at an incredible speed...
imit6243 said:
This causes our phone bills get bigger and bigger at an incredible speed...
Click to expand...
Click to collapse
That's the first time I think GPRS has been referenced to as 'incredible speed'
Point taken, though.
Chainfire said:
That's the first time I think GPRS has been referenced to as 'incredible speed'
Point taken, though.
Click to expand...
Click to collapse
LOL
Tis a sad but true point
Chainfire said:
That's the first time I think GPRS has been referenced to as 'incredible speed'
Point taken, though.
Click to expand...
Click to collapse
Guys,
the "incredible speed" is related to how fast the bill grows, not to the GPRS data connection speed...!
UP!.......

Where's the 3G!!

A week ago I got a second hand Tilt. It AT&T branded but a HTC rom was flashed to it, ROM version 3.28.405.0 WWE, Radio 1.65.17.56, Pototcol 25.83.40.02H.
My issue is I see not "3G" indicator on the screen in areas where I know there's coverage (my other phone does indicate 3G coverage). So what could this mean? Is something missing??
Any info is appreciated.
Thanks!
Headroom said:
A week ago I got a second hand Tilt. It AT&T branded but a HTC rom was flashed to it, ROM version 3.28.405.0 WWE, Radio 1.65.17.56, Pototcol 25.83.40.02H.
My issue is I see not "3G" indicator on the screen in areas where I know there's coverage (my other phone does indicate 3G coverage). So what could this mean? Is something missing??
Any info is appreciated.
Thanks!
Click to expand...
Click to collapse
You mean there is not reception icon, or there is icon but it doesnt show 3G? What it shows then?
Headroom said:
Is something missing??
Click to expand...
Click to collapse
Having already read the HTC User Manual for the TyTN II perhaps? If you get the pdf from HTCs website (or even search for it) and have a read, you'll see that in areas of 3G coverage, sometimes the device will display a 'H' which is superior to ordinary old 3G.
My issue is that I'm in an area with 3G coverage, my other cell indicates this with a "3G" icon on it's screen, but my tilt does not indicate or detects 3G coverage. There's no "3G" or "H" on my display.
Headroom said:
My issue is that I'm in an area with 3G coverage, my other cell indicates this with a "3G" icon on it's screen, but my tilt does not indicate or detects 3G coverage. There's no "3G" or "H" on my display.
Click to expand...
Click to collapse
Can u post screenshot of your screen? What icons do u have there(on the upper bar)?
You may want to look for something like Kaiser Tweak or something else that disables 3g.. Also you can try tapping on the signal icon at the top and make sure that all the data/3g stuff is turned on at the bottom.
Don't know how to get screenshoot. On the top of the Today screen there's, from right to left, the task manager, the battery, the signal strength (just the little antenna and the bars) and the WiFi icon.
Where in Kaiser Tweak or Advanced Configuration Tool could disable 3G?
Kaiser Tweak = under Data
Advanced config = again, under Data.
Tried it...no joy!
Went to Adv. Config. and eneble everything under data connections. Still nothing.
Does your sim support 3G?
Headroom said:
Went to Adv. Config. and eneble everything under data connections. Still nothing.
Click to expand...
Click to collapse
Did you check in Advance config to see if just the icons are turned of ? I believe you can just turn the icons off ( because some people find them annoying ) but still call and connect at 3G speed. Are you lacking speed or just the icons. ?
Let me re-state
I've had this Tilt for about a week, my other cell (Samsung A737) indicates "3G" all the time while I'm at work so yes my sim is 3G. This Tilt has never indicated "3G".
I went to Adv. Config under data connections and enabled everything.
What I'm trying to figure out, is this Tilt unable to detect "3G" or is it a missing icon thing.
IF
1. you have a 3g sim
2. Kaiser Tweak and Advanced config don't have 3g disabled
3. you don't have the "nodata.cab" installed
4. 3G data is turned on in the comm manager
5. HSDPA is turned on in /settings/connections/advanced network
6. All the proper info is set for your connection "media net"
and you still don't have 3g.
I would say at the very least do a hard reset or update your ROM.
Anything I'm missing?
Ok...more data...new questions
Where in Comm Manager can turn 3G on/off?
What does Medianet settings has to do with 3G?
Thanks for your answers ChumleyEX!
Headroom said:
Don't know how to get screenshoot. On the top of the Today screen there's, from right to left, the task manager, the battery, the signal strength (just the little antenna and the bars) and the WiFi icon.
Where in Kaiser Tweak or Advanced Configuration Tool could disable 3G?
Click to expand...
Click to collapse
Hehe, when u have wifi enabled the 3G icon changes to the wifi icon, just try to turn of wifi and see if the 3g,H,E or G icon will appear.
That's a thought Mikulec! Tomorrow at work I will try this. I'm home now & reception here is crap!
Headroom said:
Ok...more data...new questions
Where in Comm Manager can turn 3G on/off?
What does Medianet settings has to do with 3G?
Thanks for your answers ChumleyEX!
Click to expand...
Click to collapse
do some research and you will find all the answers you seak.
Say what?
I'm sorry ChumleyEX but that's not an answer...I dont have a data plan so MediaNet is, in my opinion, not an issue. Like I said before, that didn't keep my other (and less sophisticated cell) from detecting 3G coverage... anyway more data!!
I tried turnning off wifi to see if wifi icon becomes "3G", that doesn't work, the wifi icon gets an "X" over it & does not become "3G".
Yesterday I found out that if you try to make a video call the cell tells you if there's a 3G network available, so I tried this in my office & it answers no 3G network available.
Last night I started experimenting with flashing, I knew this cell had been flashed before by someone else, for one this is an AT&T branded Tilt but the previous owner has using it on another carrier and when I access the bootloader among the information there was "Spl 1.0 Olipro".
I flashed a couple of Hard SPLs & a couple of radios to try and it got me thinking, could the lack of "3G" be a radio or ROM issue??
Headroom said:
I'm sorry ChumleyEX but that's not an answer...I dont have a data plan so MediaNet is, in my opinion, not an issue. Like I said before, that didn't keep my other (and less sophisticated cell) from detecting 3G coverage... anyway more data!!
I tried turnning off wifi to see if wifi icon becomes "3G", that doesn't work, the wifi icon gets an "X" over it & does not become "3G".
Yesterday I found out that if you try to make a video call the cell tells you if there's a 3G network available, so I tried this in my office & it answers no 3G network available.
Last night I started experimenting with flashing, I knew this cell had been flashed before by someone else, for one this is an AT&T branded Tilt but the previous owner has using it on another carrier and when I access the bootloader among the information there was "Spl 1.0 Olipro".
I flashed a couple of Hard SPLs & a couple of radios to try and it got me thinking, could the lack of "3G" be a radio or ROM issue??
Click to expand...
Click to collapse
It definitely could be radio rom issue, but ... I am flashoholic, that means I flash almost every rom that comes out. And on most roms that I flashed the 3G icon changes after some time to the X, but after going to the internet via gprs the 3G appears once again. I dont know why is this happining, there was a disscusion about this, but I dont know in which thread.
The funny thing is although I have the X icon, I am in 3G area and I can make video calls and use the 3G cappabilities. So I dontknow why u can not.
" I knew this cell had been flashed before by someone else, for one this is an AT&T branded Tilt but the previous owner has using it on another carrier and when I access the bootloader among the information there was "Spl 1.0 Olipro"
So it's possible that the media net info is incorrect. Also, your simple phone that has the 3G show up is just that, a simple phone. This tilt isn't so simple.
if this link works, download the file and run it.
http://forum.xda-developers.com/attachment.php?attachmentid=70973&d=1203219889

HSDPA

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
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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

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