Only A-GPS??? - XPERIA X1 General

Does the Xperia X1 have only A-GPS? or does it also have built-in GPS as well? I've seen it advertised as both...with and without built-in GPS...anyone know for sure?
Thanks

The Xperia X1 has A-GPS. A-GPS and conventional GPS are not mutually exclusive. A-GPS receivers still have conventional GPS receivers, but are assisted by the cell phone signal. Nearly all GPS receivers on any new cell phones are A-GPS.

A-GPS is GPS, but with the ability to use cell towers to get a rough location to speed up the time taken to get a fix. E-GPS is a similar technology.

Does that mean I can use the GPS feature independant of the network?
Thanks

Slingbox said:
Does that mean I can use the GPS feature independant of the network?
Thanks
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Yes.
A-GPS data can be downloaded through WiFi or other network connections, but is not necessary to get a GPS fix.

Related

Internal GPS

Does Anyone knows how to get the Internal GPS to work with Windows Live Map?
Thanks,
gpsone isn't in standalone mode so it cannot be accessed by applications
There are rumors that it'll be activated in the EVDO Rev A update this fall.
so wait... mogul has a gps?
it's built into the qualcomm cpu like the kaiser. it's assumed the gps shares the cell antenna since there's no gps antenna on board and the documentation states this is possible. the kaiser has the 7200 the mogul has the 7500. kaiser w/ test rom allows for the gpsone to run in standalone mode and the kaiser seems to have an antenna so it works.
as of right now it's assumed gps will work when unlocked but it's still a gray area; there may or may not be an antenna
The FCC application describes the Mogul as
"a CDMA850/CDMA1900 (1XEVDO / 1XRTT / IS-95A/B) Pocket PC Phone with wireless LAN, bluetooth, and GPS functions."
https://gullfoss2.fcc.gov/oetcf/eas/reports/ViewExhibitReport.cfm?mode=Exhibits&RequestTimeout=500&calledFromFrame=N&application_id=391628&fcc_id='NM8TITA100'
the listing of gps functionality is ambiguous; all cellphones are required to have agps for e911 emergency in the usa as mandated by the fcc. gpsone is in quite a few htc devices but only a handful have antennas attached
how accurate is agps? versus standalone gps?
someone on PPCgeeks reported that Live Search was working on Sprint Moguls using tower triangulation. I'm not sure if this is different than AGPS, but it sure it neat to have location based services, even if accurate only to a few hundred yards...
Dishe said:
someone on PPCgeeks reported that Live Search was working on Sprint Moguls using tower triangulation. I'm not sure if this is different than AGPS, but it sure it neat to have location based services, even if accurate only to a few hundred yards...
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A-GPS = tower assisted GPS.
http://en.wikipedia.org/wiki/Assisted_GPS
i had my telenav rep confirm when the rev a patch is released that the GPS will be unlocked as well.
samspoon said:
the listing of gps functionality is ambiguous; all cellphones are required to have agps for e911 emergency in the usa as mandated by the fcc. gpsone is in quite a few htc devices but only a handful have antennas attached
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All cell phones certainly DO NOT have aGPS. Please do not confuse aGPS for tower triangulation.
aGPS is assisted GPS meaning it uses the cell phone towers to assist an existing GPS chipset.
So if the Mogul has aGPS, then it has to have GPS by definition.
he is right though. FCC does now require that ALL new phones in the united states have GPS (to an extent) for at least e911.
TC1 said:
A-GPS = tower assisted GPS.
http://en.wikipedia.org/wiki/Assisted_GPS
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Yes, I'm aware of the definition.
The way AGPS is described is similar to how articles are describing the technology Sprint and MS are using... and since every Sprint phone is mandated by the FCC to have 911 AGPS capabilities, I'm wondering if this is the same thing.
samspoon said:
as of right now it's assumed gps will work when unlocked but it's still a gray area; there may or may not be an antenna
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The Kaiser has a big "GPS" on the back where you can hook up an external antenna. No such luck with the Mogul.
But I still can hope that _some_ kind of GPS would come with Rev.A. Sucky GPS is better than no GPS...
I think you guys know as well as I do, that even if the phone has a functional gps and a antenna sprint will still never unlock it. Its not that they dont want to, they are lazy. There have been lots of firmware "updates" I have been waiting for on other sprint phones that they were going to release and never did.
As for external GPS recievers what do you guys think of this one?
http://www.semsons.com/wo44chawaauo.html
That supports A-GPS you think that would work?
Madzilla said:
I think you guys know as well as I do, that even if the phone has a functional gps and a antenna sprint will still never unlock it. Its not that they dont want to, they are lazy. There have been lots of firmware "updates" I have been waiting for on other sprint phones that they were going to release and never did.
As for external GPS recievers what do you guys think of this one?
http://www.semsons.com/wo44chawaauo.html
That supports A-GPS you think that would work?
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if you are going to go with an external BT reciever any should work, since its not using the phones GPS at all
If you want an external, get a Holux M-1200. Tiny, cheap, and works amazing. I love mine!
ok, so any external gps will work? some of them say A-GPS compatible and others dont. Does that matter at all?

blackstone is a real GPS ?

may be a dumb question.
Is blackstone has a GPS (not AGPS) ?
ie. without a sim phone card , it can still receive GPS signal for mapking ?
It's a real GPS, works great with, for example TomTom.
yes gps works without a sim card. agps is also available through registry settings but requires a Data connection.
lots of people seem to think that aGPS is a cheap substitute for normal gps
but thats not the case aGPS is normal gps plus the ability to get locations
from cellphone towers if one can't get a clear gps signal like if one enters
a long tunnel
http://en.wikipedia.org/wiki/GPS_Phone
aGPS is often mistaken as location-based service (LBS) or server-based GPS. mainly because the first generation of "Quick GPS" is also known as AGPS, which essentially is to download the satellite orbit path in advance instead of get it directly from the satellites at the point the receiver is trying to get a fix. The download process (receiving it from satellite) can be a lengthy process (30sec or longer depending on the reception level) thus the purpose of QGPS/AGPS.
I wrote a short article on the myth about AGPS, you can take a read if you are interested
Does anyone know what GPS chip is actually in the Touch HD? Is it a Sirf III? Is Static Navigation "ON" by default?
gregwee said:
Is it a Sirf III?
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No, it isn't. GPS is integrated in the MSM chip, I think its called something like Qualcomm MSM7201A gpsOne.
zenkinz said:
aGPS is often mistaken as location-based service (LBS) or server-based GPS. mainly because the first generation of "Quick GPS" is also known as AGPS, which essentially is to download the satellite orbit path in advance instead of get it directly from the satellites at the point the receiver is trying to get a fix. The download process (receiving it from satellite) can be a lengthy process (30sec or longer depending on the reception level) thus the purpose of QGPS/AGPS.
I wrote a short article on the myth about AGPS, you can take a read if you are interested
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thanks very much ..
thanks all for explaining ...

[Q] aGPS question

Hi
Does aGPS require you to have a cellular data connection in order for it to work? Or will it work with any internet connection (eg. using my laptop's connection through wifi)? I'm asking because I don't have a data plan (yet), and my phone has locked only _once_ since I bought it a month or so ago. I've tried switching to MS based in LbsTestmode, changing the supl server to supl-google-com and supl-nokia-com (can't post links yet).
The one time it did lock was when I was testing the GPS without an internet connection, and I entered a WiFi covered area and it suddenly locked (5-10m accuracy). It wasn't WiFi-based positioning because it was my laptop's WiFi hotspot. And I was using the default settings at that time (www-spirent-lcs-com, Standalone mode). Since then I've tried different combinations of settings but it hasn't ever locked.
Another question: What's the difference between MS based and MS assisted modes?
My phone is an I9000 Galaxy S.
ssj4Gogeta1 said:
Hi
Does aGPS require you to have a cellular data connection in order for it to work? Or will it work with any internet connection (eg. using my laptop's connection through wifi)? I'm asking because I don't have a data plan (yet), and my phone has locked only _once_ since I bought it a month or so ago. I've tried switching to MS based in LbsTestmode, changing the supl server to supl-google-com and supl-nokia-com (can't post links yet).
The one time it did lock was when I was testing the GPS without an internet connection, and I entered a WiFi covered area and it suddenly locked (5-10m accuracy). It wasn't WiFi-based positioning because it was my laptop's WiFi hotspot. And I was using the default settings at that time (www-spirent-lcs-com, Standalone mode). Since then I've tried different combinations of settings but it hasn't ever locked.
Another question: What's the difference between MS based and MS assisted modes?
My phone is an I9000 Galaxy S.
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Correct me if i am wrong, but as i know aGPS doesn´t need any Data Connection to make the triangulation between the GSM Antennas. So no need for Internet Connection to use aGPS.
TMReuffurth said:
Correct me if i am wrong, but as i know aGPS doesn´t need any Data Connection to make the triangulation between the GSM Antennas. So no need for Internet Connection to use aGPS.
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AFAIK aGPS is different from cellular triangulation. It refers to downloading satellite information from a server for a quicker fix.
ssj4Gogeta1 said:
AFAIK aGPS is different from cellular triangulation. It refers to downloading satellite information from a server for a quicker fix.
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I thought it would make a triangulation between the next availabe antennas in range and get over a dedicated channel (not data channel as mentioned above) localisation informations. Because my Nokia N80 had aGPS but not real GPS and in the manual they said something about this triangulation.
But of course i know the download of the actual satelite coordenates from my Touch HD in Windows Mobile with a dedicated App. Just thougth it is something diferent.
TMReuffurth said:
I thought it would make a triangulation between the next availabe antennas in range and get over a dedicated channel (not data channel as mentioned above) localisation informations. Because my Nokia N80 had aGPS but not real GPS and in the manual they said something about this triangulation.
But of course i know the download of the actual satelite coordenates from my Touch HD in Windows Mobile with a dedicated App. Just thougth it is something diferent.
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Click to collapse
aGPS is a technology that downloads satellite data from agps servers at realtime (that is the time you are using the GPS): WIKI article
I guess that the app you are refering to, the one you used on the HTC, is Quick GPS. This program doesn't download satellite postition data in realtime but once in a while. (I believe the data are vallid for 48h) With Quick GPS one can still enjoy the features of aGPS while one hasn't a data connection with a aGPS server.
The Galaxy S GPS (BCM4751) seems to have both, aGPS and a sort of Quick GPS. Only the last is called LTO by broadcom. (see: http://www.broadcom.com/press/release.php?id=s443754 about BCM4571 specs and see here about LTO.
aGPS uses cell tower triangulation, and information from a server, in addition to satellite radio signals, to quickly assist in determining the coordinates of a phone's location. Since cell tower sites are precisely surveyed, they are a reliable source for locational data. A data connection is required. All modern cell phones, at least here in the United States, are required to have aGPS service for use in locating a phone by emergency responders. This is a part of the E911 and is required by FCC mandate. Data is used in tracking down the phone, but it happens behind the scenes and is paid for by fees charged to cellular users on their bills for E911 compliance.
On phones that allow the user to make use of the aGPS chip, there will generally be a setting that allows you to set for E911 use only, or for what is commonly referred to as "location based services." On my Android phones, there are actually two settings, both found in Location & Security Settings. One allows for location based upon use of wireless networks, and the other allowing a fix via GPS satellites. Even with any location based services turned off, emergency responders can still find the phone. The difference being that you cannot use it.
While it is technically possible for you to use your phone's aGPS without a data connection, your chances of getting a signal are sketchy, and your chances of getting a really accurate signal are, under most circumstances, slim to none. Much of the computational work in determining your location is done by the assistance server, and guess how that information moves to and from your phone? Yep, you guessed it, data!
GPS signals sent from satellites are simply radio signals, and your local pop music radio station probably sends its signals with more force. As they are radio signals, they have to contend with everything a radio signal has to deal with, and a large percentage of that is man-made. Signals confusingly bounce off of buildings, are weakened by passing through walls and foliage, or can even be absorbed in some cases by different materials.
Some aGPS chips cannot function as stand alone GPS, and will not work at all without a data connection.
Try this, turn off your cellular radio. Make sure that your WiFi is also off. Now, fire up Google Maps and ask it to start navigation. How did it work?
appelflap said:
I guess that the app you are refering to, the one you used on the HTC, is Quick GPS. This program doesn't download satellite postition data in realtime but once in a while. (I believe the data are vallid for 48h) With Quick GPS one can still enjoy the features of aGPS while one hasn't a data connection with a aGPS server.
.
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Yeah, that i was talking about. Didn´t know this all I love this forum, you always learn more and more.
rasmith3530 said:
Try this, turn off your cellular radio. Make sure that your WiFi is also off. Now, fire up Google Maps and ask it to start navigation. How did it work?
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Well, using Google Maps would not be a valid test, of course, since you need data connection to download the local map anyway. If you want to test whether data connection is requires by aGPS, you need to use an offline GPS application.
Thank you for your guys replies.
@rasmith3530: So can that data be downloaded over wifi? (My common sense says yes, just trying to confirm.) If it can, then aGPS isn't working for me at all. I see at max 2-3 satellites in LbsTestMode, without a lock on any of them.
No one said aGPS is working on SGS. They are broken and no fixes yet.
foxbat121 said:
No one said aGPS is working on SGS. They are broken and no fixes yet.
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I think you're right. The fact that there are no ephemeris and almanac data recorded for satellites let me think that it may be the case that with a certain informed guess aGPS and the advertised LTO function doesn't work on none of the firmwares.
Other people seem to have locking/accuracy problems, they can at least see those satellites. Mine normally shows 0 or 1, so I thought maybe I'm doing something wrong.
ssj4Gogeta1 said:
Other people seem to have locking/accuracy problems, they can at least see those satellites. Mine normally shows 0 or 1, so I thought maybe I'm doing something wrong.
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In JM1-JG5, I had that issue (couldn't lock onto anything). Switching to JM5 fixed that..

[Q] integrated GPS on both Rogers and AT&T Focus

Does both Rogers and AT&T Samsung Focus have a built in GPS (don't need a data plan)? Ever site I've looked at for the specs gives conflicting information.
fastmhc said:
Does both Rogers and AT&T Samsung Focus have a built in GPS (don't need a data plan)? Ever site I've looked at for the specs gives conflicting information.
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As I understand, my focus at&t has built in GPS that can be used with and without a data plan. It just depends what GPS software you are using for instance any GPS software that uses realtime updates or online maps requires data to be used while GPS is enabled...some 3rd party software use stored on device offline maps that would not require a data plan. As for specific programs that use online and offline maps I don't know. I use a data plan so I don't have to worry about that stuff.
This is my understanding so if anyone has better insight be my guest
All WP7 phones have a GPS, just like they all have a camera, three front buttons, a gravity sensor, proximity sensor, ambient light sensor and a compass. There are free GPS apps that are on the Marketplace that will allow you to see the GPS does work.
In time, there will be standalone gps navigation apps for sale on the Marketplace, it just takes a little patience.
I just don't want assisted GPS (A-GPS). I want an integrated GPS chip. All phones dont' have a built in GPS (I think older iphones). I currently have a Samsung i8910 and it has an integrated GPS. I bought Garmin software to use the GPS maps and when I am overseas I just need to buy the maps for that region to access the maps. If you have A-GPS you have to buy a data plan from that country's carrier and using their network, you access the internet (google maps) to get your maps. I hope that is clear??
You totally misunderstood what A-GPS is.
Sent from my SAMSUNG-SGH-I897 using XDA App
Maybe I don't? this is a quote for the wiki page for GPS navigation for phones
" Some phones with GPS capability work by assisted GPS (A-GPS) only, and do not function when out of range of their carrier's cell towers. "
WP7's have A-GPS. They use both radio towers and satellites to obtain a fix on your location.
So yes, once a proper mapping application is released, you can travel to other countries without needing a data plan.
From wiki, sums it up pretty well i would say:
""Standalone" or "Autonomous" GPS operation use radio signals from satellites alone. A-GPS additionally uses network resources to locate and utilize the satellites faster as well as better in poor signal conditions."
Source:
http://en.wikipedia.org/wiki/Assisted_GPS
fastmhc said:
Maybe I don't? this is a quote for the wiki page for GPS navigation for phones
" Some phones with GPS capability work by assisted GPS (A-GPS) only, and do not function when out of range of their carrier's cell towers. "
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Most of today's cell phone GPS chips can work either in standalone mode or Assited mode. A(ssited)-GPS helps to speed up your initial satellite lock by downloading satellite information from network. If you have no data connection, the chip will fall back to standalone mode. With A-GPS properly working, you can achive first lock within 10 seconds. Without it, you may have to wait for couple minutes for your first lock. After the initial lock these GPS chips work autonomously unless you use MS-Assited A-GPS mode. With the power of today's Smartphone, there is zero reason for using MS-Assisted mode unless you're using it in E911 situations.
It is ultimately the navigation software you choose determines whether or not you need cell data connection. Currently standalone navigation software on WP7 is quite limited or non-existent. If that is important to you, you may want to look for other Smartphones like iPhone or Android phones. Your old WM software won't work in WP7.

[Q] What's the best GPS Navigation map for the DVP?

I'm here at the US and I've seen some gps navigation apps that I can use offline in the marketplace and the different reviews on each one of them but I really want feedback here at xda. Is it Navigon USA/Canada, Turn by Turn, or something else?
One side question related to this. I know that DVP only has AGPS. Is it capable of offline gps navigation without using any data from the carrier? I don't have unlimited data plan.
You must be confusing what AGPS means, it's GPS + optional tower support to accelerate lock ons. All AGPS devices by definition also support GPS.
Besides that it depends on if you have an app that has cached/downloaded maps. It depends entirely on the app to support downloading maps ahead of time.
Try Navigon(Garmin), it doesnt req. gprs connected, good map's covarage/inteface.
TheManii said:
You must be confusing what AGPS means, it's GPS + optional tower support to accelerate lock ons. All AGPS devices by definition also support GPS.
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Thanks for clarifying. I thought AGPS is just cellular tower support.
gmaps from the marketplace works well
I use Gmaps for long range navigation and Turn By Turn (free) once I get there(and locally) due to the limited mile radius of the free version. I considered the pricier options but this setup works fine for me.
Is there any free app to use in offline mode? Any of them working in Venezuela? I miss so much that feature that I had on my nokia n82
gps
joshzzz2001 said:
Thanks for clarifying. I thought AGPS is just cellular tower support.
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I guess, mine just work with A-GPS ... i buy the navigon, it seems very nice, but my gps antena, i guess its the problem, doesnt work... Somebody have the same problem?
thanks by the way...

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