Should be. I think the major consideration of u-blox A-GPS is to speed up TTFF, decrease the TTFF from at 40 seconds or so to 10 seconds or so. A-GPS online needs network connection, if network connection is unavailable, AssistNow offline or something else are expected to provide initial aiding data such as almanach and/or ephemeris.
Most of the time user know his/her location, but may unable to get GPS fix due to bad environment (e.g. buildings). If we have aiding data, we can submit them to GPS chip. What data to submit depends on your current location and time. Location can be specified by (1) picking up from map, (2) or last valid location recorded by GPS software (3) or from phone network (some service providers provide this kind of service with charge fee). I think get locations by cell id is especially useful in case of weak or no GPS signals. I'll have a look at opencellid, thanks. Rikard Nilsson wrote: > >> What about if we hack the data format of u-blox AGPS offline file, and >> extract data for current location and time? location can be specified by >> clicking map, time from local system time. If we could, we would be able >> to >> submit data to GPS chip as AGPS online message on demand. What do you >> think? > > Wouldnt it be possible to get the location from the gsm-network in some > way? > > /Rikard > > _______________________________________________ > Openmoko community mailing list > email@example.com > http://lists.openmoko.org/mailman/listinfo/community > > -- View this message in context: http://n2.nabble.com/thoughts-on-A-GPS-offline-tp2338403p2340272.html Sent from the Openmoko Community mailing list archive at Nabble.com. _______________________________________________ Openmoko community mailing list firstname.lastname@example.org http://lists.openmoko.org/mailman/listinfo/community