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sdpkom is offline sdpkom
2011-05-29 , 12:30
Posts: 38 | Thanked: 13 times | Joined on Oct 2009
#1
I would like to be able to "tweak" the phone to think it is receiving higher signal (more bars).

I think this would increase battery life because the transmitter would decrease power levels.

Don't know how to do it.

Functionality

When there is no phone call/high speed download
fake signal levels that are XdB more then the real.

Thanks for any help
 

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xur17 is offline xur17
2011-05-29 , 13:17
Posts: 356 | Thanked: 123 times | Joined on Dec 2008
#2
The phone part of the software is closed source, so it is very unlikely that you would be able to do this. And this sounds like a bad idea to me...
 
thashku is offline thashku
2011-05-29 , 13:23
Posts: 62 | Thanked: 18 times | Joined on Apr 2011 @ India
#3
poll abills to get the source opened; you shall have most of the buggy stuff kicked out of the Beast.
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lardman is offline lardman
2011-05-29 , 18:48
Posts: 2,102 | Thanked: 1,309 times | Joined on Sep 2006
#4
Originally Posted by thashku View Post
poll abills to get the source opened; you shall have most of the buggy stuff kicked out of the Beast.
You still won't ever have access to the modem software, so that's not going to work.

@sdpkom: I would assume that the modem hw & sw manufacturers do actually know what they are doing regarding transmitter power levels.
 
shadowjk is offline shadowjk
2011-05-29 , 21:20
Posts: 1,258 | Thanked: 672 times | Joined on Mar 2009
#5
on 3g it's the base station telling devices what power they should use
 
sdpkom is offline sdpkom
2011-05-30 , 07:03
Posts: 38 | Thanked: 13 times | Joined on Oct 2009
#6
Originally Posted by lardman View Post
@sdpkom: I would assume that the modem hw & sw manufacturers do actually know what they are doing regarding transmitter power levels.
It would not be the first time I've seen hw & sw manufacturers doing a poor job.
Anyone who owns an N900 probably knows that, we tweak almost every component in the system and improve it.

I hope, besides all the people explaining why it can't be done, there would be someone explaining how it can be done.

I want to tweak the phone into thinking the signal is slightly larger, not to rewrite the modem code.

This is hopefully doable.

If you look at the settings of most transmitters (look in your wifi router setup), this is usually a free parameter. you can have more power in broadcast and less retransmissions of data, or less power at broadcast and more retransmissions of data.
There is an optimum, which I am not sure Nokia found.
 
lardman is offline lardman
2011-05-30 , 09:12
Posts: 2,102 | Thanked: 1,309 times | Joined on Sep 2006
#7
Fair enough, but the point stands that this is almost certainly all handled inside the modem, so there's almost no chance that you'll be able to do anything about it.
 
retsaw is offline retsaw
2011-05-30 , 09:22
Posts: 701 | Thanked: 585 times | Joined on Sep 2010 @ London, England
#8
If you have to ask how to do it then you probably aren't qualified to do it. To be honest I doubt anyone here is, though a few may be smart enough to work it out. The cellular modem firmware is included in the FIASCO firmware image, if you know what you are doing you'll be able to extract it, decompile and reverse engineer it to the point where you can hack a modified version that does what you want.

But really, if there is one thing that I would trust Nokia to do well, it is making the cellular modem work properly. From my experience my N900s work better than my sisters' iPhones in poor reception on the same networks so I don't really have any complaints. I don't find it to be draining too much power either (although I do live in a good reception area).
 
bolbit is offline bolbit
2011-05-30 , 12:02
Posts: 5 | Thanked: 1 time | Joined on Apr 2010
#9
Originally Posted by sdpkom View Post
It would not be the first time I've seen hw & sw manufacturers doing a poor job.
Anyone who owns an N900 probably knows that, we tweak almost every component in the system and improve it.

I hope, besides all the people explaining why it can't be done, there would be someone explaining how it can be done.

I want to tweak the phone into thinking the signal is slightly larger, not to rewrite the modem code.

This is hopefully doable.

If you look at the settings of most transmitters (look in your wifi router setup), this is usually a free parameter. you can have more power in broadcast and less retransmissions of data, or less power at broadcast and more retransmissions of data.
There is an optimum, which I am not sure Nokia found.
Hi, the link between the terminal (phone) and the Base Station (core network) is always monitored, and the capability for the phone to reduce its transmit power is managed by the core network. It is even more important in 3G (UMTS) than for the 2G (GSM/GPRS). So it seems not a good idea to play with this parameter as it is deeply linked to the way Base Station manages the connection and therefor the 2G/3G offered services (voice, Data, etc). [sorry for the stange words, i'm french]
 
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hawaii is offline hawaii
2011-05-30 , 14:49
Posts: 1,030 | Thanked: 792 times | Joined on Jun 2009
#10
CMT is checksummed within the FIASCO, so you'd need to reverse that before you try and make any changes.

In short - Nokia has been making cellular network devices for decades. I imagine they have it down pat.
 
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