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Milhouse is offline Milhouse
2008-01-13 , 18:18
Posts: 3,401 | Thanked: 1,255 times | Joined on Nov 2005 @ London, UK
#21
But in order for A-GPS to work the connection server must know roughly where you are. If your N810 knows the GPS coordinates of the WiFi access point you are connected to then it might help the assistance servers pin point your location but normally the cellular network base stations provide this information every time, making it a much more reliable method.

Perhaps OS 2008 can establish a connection to a cell phone over Bluetooth and use the cell phone to obtain the necessary A-GPS details, passing the base station information to the assistance server over WiFi (if WiFi is available) or alternatively over the cellular network itself. Chances are though the required information won't be available from the phone itself.
 
klwdallas is offline klwdallas
2008-01-22 , 06:04
Posts: 26 | Thanked: 0 times | Joined on Jul 2007 @ Lewisville, TX
#22
Originally Posted by Milhouse View Post
Perhaps OS 2008 can establish a connection to a cell phone over Bluetooth and use the cell phone to obtain the necessary A-GPS details, passing the base station information to the assistance server over WiFi (if WiFi is available) or alternatively over the cellular network itself.
This seems possible and is what I was thinking as I read the thread.

After using my N82 for a couple of months (that has A-GPS), I got spoiled with the quickest locks I've ever had. I actually got my LD-1W back out to use with the N810 after waiting over 5 minutes and not getting a single satellite.

You can set up the N810 to use a mobile's GPS over BT, but it wasn't as immediate as I had hoped with my N82. Maybe I'll try again.
 
Milhouse is offline Milhouse
2008-01-22 , 06:45
Posts: 3,401 | Thanked: 1,255 times | Joined on Nov 2005 @ London, UK
#23
Originally Posted by klwdallas View Post
You can set up the N810 to use a mobile's GPS over BT, but it wasn't as immediate as I had hoped with my N82. Maybe I'll try again.
Using the GPS coordinates from the N82 is possible with a tablet?

If so that's great because the N95 (bigger, bulkier relation to the N82) never supported the SIP profile which meant it was impossible to export the N95s GPS coordinates to an external device such as a Nokia Internet Tablet. I presumed the N95 was intentionally hobbled because Nokia didn't want their GPS enabled smartphones cannibalising their handheld GPS modules.
 
Alizarin is offline Alizarin
2008-01-22 , 19:11
Posts: 5 | Thanked: 0 times | Joined on Jan 2008 @ Florida
#24
A thought... Perhaps things can be modified to save the last position recorded by the GPS? It wouldn't work for cases like a long airplane trip, or driving across a state and then turning the GPS on, but it probably would be sufficient for what is most likely the common usage case: Take it out of the car, go into a shop or other building, come back out sometime later, turn GPS back on.

Now that I've got my N810 (no developer discount though, I didn't think to apply), I can dig into the GPS a little bit and see if anything can be done. Hot-start over Bluetooth would be pretty cool.
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burmashave is offline burmashave
2008-01-25 , 16:33
Posts: 86 | Thanked: 24 times | Joined on Jan 2008
#25
Has anyone discussed acquisition times while the N810 is on the charger versus off? I can only report my unscientific findings; however, my N810 usually gets a fix within 5 minutes while in my house if it is connected to the charger. Once acquired, it maintains the fix after I remove the charger.

This compares to 30-60 minutes required to get a fix while in my house when it is off the charger.
 
gemniii42 is offline gemniii42
2008-01-25 , 16:45
Posts: 833 | Thanked: 124 times | Joined on Nov 2007 @ Based in the USA
#26
Originally Posted by burmashave View Post
Has anyone discussed acquisition times while the N810 is on the charger versus off? I can only report my unscientific findings; however, my N810 usually gets a fix within 5 minutes while in my house if it is connected to the charger. Once acquired, it maintains the fix after I remove the charger.

This compares to 30-60 minutes required to get a fix while in my house when it is off the charger.
Search the threads -
I know I've reported on times to acquire - I don't think it's ever taken an hour, but maybe I just did not leave it long enough.
If I step outside with it:
And it has had that position recently
And I don't drive or walk with it
Acquisition is under a minute usually

And it has had that position recently
And I drive or walk with it
Acquisition is about 5 minutes usually

And if it has been moved a significant distance (Virginia to Kansas)
And I don't drive or walk with it
Acquisition may take 5 to 15 minutes

And if it has been moved a significant distance (Virginia to Kansas)
And I drive 70+mph down the interstate with it
Acquisition may take 15 to 20 minutes.
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Last edited by gemniii42; 2008-01-25 at 16:50.
 
lardman is offline lardman
2008-01-31 , 16:41
Posts: 2,102 | Thanked: 1,309 times | Joined on Sep 2006
#27
A thought... Perhaps things can be modified to save the last position recorded by the GPS? It wouldn't work for cases like a long airplane trip, or driving across a state and then turning the GPS on, but it probably would be sufficient for what is most likely the common usage case: Take it out of the car, go into a shop or other building, come back out sometime later, turn GPS back on.

Now that I've got my N810 (no developer discount though, I didn't think to apply), I can dig into the GPS a little bit and see if anything can be done. Hot-start over Bluetooth would be pretty cool.
This appears to be done at the moment. Take a look at the files stored in /var/lib/gps/ and at the output of gpsdriver (start it in an xterm, then start maemo mapper or something else which uses the gps).

Simon
 
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Texrat is offline Texrat
2008-01-31 , 17:13
Posts: 11,700 | Thanked: 10,045 times | Joined on Jun 2006 @ North Texas, USA
#28
I'd also like a "recall last route or address" feature in the software, for temporary use. I need to submit that properly...
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Texrat is offline Texrat
2008-01-31 , 17:14
Posts: 11,700 | Thanked: 10,045 times | Joined on Jun 2006 @ North Texas, USA
#29
Originally Posted by Milhouse View Post
Using the GPS coordinates from the N82 is possible with a tablet?

If so that's great because the N95 (bigger, bulkier relation to the N82) never supported the SIP profile which meant it was impossible to export the N95s GPS coordinates to an external device such as a Nokia Internet Tablet. I presumed the N95 was intentionally hobbled because Nokia didn't want their GPS enabled smartphones cannibalising their handheld GPS modules.
Someone (RogerS or Reggie I think) posted recently that a third-party tool enables the N95 to share its GPS functionality.
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jussik is offline jussik
2008-01-31 , 20:55
Posts: 139 | Thanked: 24 times | Joined on Sep 2005
#30
Originally Posted by Milhouse View Post
But in order for A-GPS to work the connection server must know roughly where you are.
Not necessarily, if I've understood correctly -- approximate location helps, but just getting the almanac data over internet should speed first fix quite a lot.

Perhaps OS 2008 can establish a connection to a cell phone over Bluetooth and use the cell phone to obtain the necessary A-GPS details, passing the base station information to the assistance server over WiFi (if WiFi is available) or alternatively over the cellular network itself. Chances are though the required information won't be available from the phone itself.
I just tried this with libgammu (not on the tablet, but on a linux laptop. Should work just the same on tablet). We have three phones in the house and I could coax one of them, the newest Nokia, into telling this over bluetooth:

Country: 244
Network: 05
Local area code: 232D
Cell id: 0603
Could be that the others would work too if I figured the right settings...
 
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