mathew davis wrote:
Dear community,
I am not sure if this is a widely known thing or not, but I just found
out about it and had some questions about this working on the neo.
T-mobile has hotspots all around my area, but have been experimenting
with a new service called T-mobile HotSpot @Home. It uses a UMA
(unlicensed mobile access) technology to allow phones to switch from
cellular connection to Wi-Fi connection. And also makes it possible for
VoIP calls. So this is something that is very interesting to me only I
would like it to be a little different, I don't want to use T-Mobile's
service I would like to use my Wi-Fi connection to my VoIP of choice. I
know this has been talked about before with some options including an
Astrex box forwarding the call to your cellphone until your in range
then switching to Wi-Fi but that was not a very seamless transistion
from my understanding. So I guess my question is could we impliment a
UMA type of technology for the neo that is customizable to use our VoIP
provider? Or since that particular part is locked we wouldn't have
access to that part? Just curious. When I get the phone I will be
playing with trying to find a solution to this problem. I have very
limited knowlege about this kind of thing. I am not an experianced
programmer yet. I only have about 3 yers of indestry experiance, but
none of that is mobile development and almost none of it is linux
related, so I have a bit of a learnign curve so that is why I am asking
the question here.
while not fully up to speed on how it all works, here is my quick take
on it:
as long as its a voip connection, and said voip service allows two ip's
to share a account and call, there should be little to no problem having
both a wifi and gprs connection open at the same time as one moves about
(in my experience a gprs connection can be held open but not used).
hell, one may even use bluetooth if it can handle the data transfer.
the problem here is that ip thing. UMA has a normal mobile phone
connections as one option so therefor dont have to think about multiple
ip's. it just need to have a internet connected cell so to speak, and
only hand the call over when the ip based connection is fully in place.
however im guessing there are some issues with going between two wifi
zones/networks or something similar...
so mostly you need a voip service that allows you to log in from another
ip without booting the old connection off or hanging up any calls. after
that its mostly a case of the client software figuring out what of the
two connections to send on. or maybe just send on both, expecting the
service to throw away the data thats a duplicate. something that i think
is a basic feature in mobile phone systems.
one funny thing is that if your using voip, and have a flat rate data
plan for your mobile phone, there is no need to go wifi anyways as the
mobile data connection will probably be more reliable given that its
already built to do what one is trying to make the wifi system do
(handover, multiple connections and overlapping zones).
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