Hi 2016-01-04 16:39 GMT+01:00 Thomas Voß <thomas.v...@canonical.com>:
> > > On Mon, Jan 4, 2016 at 12:43 PM, Krzysztof Tataradziński < > ktatar...@gmail.com> wrote: > >> Hello, >> >> 2016-01-03 21:21 GMT+01:00 Thomas Voß <thomas.v...@canonical.com>: >> >>> Hey there, >>> >>> thanks for your feedback. Let me try to provide some detail regarding >>> your questions: >>> >>> (1.) Whether you are using a mid-to-high-end or a budget phone does >>> hardly have any impact on the positioning performance in general. GPS just >>> is quite slow. >>> >> >> So why in example LG L Fino can find proper location in 1-5 seconds? It >> is possible to see how they do that and implement the same / similar >> solution in our Ubuntu phones? >> > > > Please refer to the second part of my answer, explaining in detail that we > are taking a very similar approach to what android is doing. We are relying > on a different network-based positioning service (namely, Here), though. > One other thing: How do you know that you received a gps fix on the LG L > Fino? > Like I said before "at start mobile data and WiFi turned off. Next step - turning mobile data on, opening GPS app (Google Maps and uNav) and waiting for proper location." In details, while going to work at moring, I exit my building, turned mobile data on (on both phones I've got GPS switch turned on all the time), etc. On Google Maps there is a ring showing accuracy. When app started, I saw circle with 2-4 meters radius right where I was. > > Cheers, > > Thomas > >> >> >>> (2.) Assisted GPS, relying on network-based positioning taking into >>> account wifi hotspots and cell towers is enabled for all production images. >>> (3.) 30 seconds - 2 minutes for a position estimate with GPS accuracy is >>> pretty good, actually. Some more details on the timing here: >>> * ~15 seconds are required to obtain an initial position estimate >>> based on visible wifi networks and cell towers. The accuracy for this >>> estimate is typically around ~100m, but >>> can be as low as ~30m (in typical cases). >>> * This initial position estimate is fed into the GPS chipset which is >>> already active, and it takes ~20 seconds - multiple minutes for the chipset >>> to come back with a >>> a position estimate. >>> >>> That being said, we are working on improving the overall user experience >>> by caching the last known position estimates and handing those out right >>> after an >>> application has requested location services to become active. The >>> algorithm requires some careful tuning, as with every other caching >>> approach, though. >>> >>> Please note that it is very unlikely that we will provide an option to >>> keep the gps chipset on all the time. Battery life would be a disaster, as >>> the GPS chipset >>> is draining a *lot* of power. We would be talking a few hours for the >>> battery to discharge, if we kept the chipset active. >>> >>> Feel free to file a bug against location services if you think that >>> there is any specific optimization for minimizing time-to-first-fix that we >>> are missing: >>> >>> https://bugs.launchpad.net/ubuntu/+source/location-service >>> >>> HTH, >>> >>> Thomas >>> >>> >>> >>> On Sun, Jan 3, 2016 at 12:48 PM, Krzysztof Tataradziński < >>> ktatar...@gmail.com> wrote: >>> >>>> Hello, >>>> >>>> >>>> We all know that on MX4 getting GPS fix takes really long time (30 sec >>>> - 2 min), making scopes like NearBy useless in most of cases. I have a look >>>> at budget LG L Fino with Android and compared it to MX4. >>>> In both phones test was the same: at start mobile data and WiFi turned >>>> off. Next step - turning mobile data on, opening GPS app (Google Maps and >>>> uNav) and waiting for proper location. >>>> MX4 time - as mentioned above. LG L Fino - I didn't notice when it find >>>> location - it was that fast (simply when Maps finished opening, I saw >>>> correct location). Could anyone explain why budget phone can find location >>>> in 1-2 sec and mid-to-high-end MX4 can't? Is there hardware problem or >>>> software? Maybe in LG L Fino, system is asking for location all the time >>>> keeping GPS fix all the time it can? Is there anything we can do with >>>> data, even at the cost of battery usage? (for now, I can use MX4 even 4-5 >>>> days without charging - but I would prefer to charge it even 1,5 days if >>>> that could improve location services) >>>> >>>> Best regards, >>>> Krzysztof Tataradziński >>>> https://launchpad.net/~ktatar156 >>>> >>>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>>> Ten >>>> e-mail został wysłany z komputera wolnego od wirusów chronionego przez >>>> Avast. >>>> www.avast.com >>>> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> >>>> <#1520d4abffceac7e_1520c731be467442_15209268ba70d4b1_1520751ab53dee75_DDB4FAA8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >>>> >>>> -- >>>> Mailing list: https://launchpad.net/~ubuntu-phone >>>> Post to : ubuntu-phone@lists.launchpad.net >>>> Unsubscribe : https://launchpad.net/~ubuntu-phone >>>> More help : https://help.launchpad.net/ListHelp >>>> >>>> >>> >> >
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