On Thu, Jan 25, 2007 at 05:12:09PM +0100, Marcus Bauer wrote: > On Thu, 2007-01-25 at 16:24 +0100, Harald Welte wrote: > > > > 3. A-GPS involves additional data traffic and thus (potential) additional > > > costs. Does it use a normal GSM/GPRS IP-based data transfer? does it use > > > some out-of-band GSM/GPRS control messages? or does it get data from > > > broadcasts in the local cell (e.g. GSM cell-broadcast)? > > > > AFAIK: GPRS. so its up to you whether you want that extra traffic (and > > cost, unless you're flat) or not. > > The Global Locate docs state TCP/IP as one possible way. So via > USB-network or BT should be possible too.
What do you think do we run on top of usbnet and bluetooth BNEP ? The answer is: TCP/IP ;) So anything that uses TCP/IP and can be attached to the phone will be able to connect the AGPS server[s]. > You need it only once for the first fix. It is ~2KB for all satellites > and valid for 2-4 hours. Precomputed for a week maybe 1MB. One thing that we should look into is to have something like an RSS Feed of that data, which can be downloaded everytime we have a cheap (bluetooth, usbnet) IP connectivity. Then cache all that data locally. -- - Harald Welte <[EMAIL PROTECTED]> http://openmoko.org/ ============================================================================ Software for the worlds' first truly open Free Software mobile phone _______________________________________________ OpenMoko community mailing list [email protected] https://lists.openmoko.org/mailman/listinfo/community
