Always-on networking via GPRS

[Steven **]

These seem like very technical questions.  Perhaps the devel list
would get you better responses?

-Steven

On 5/1/07, Nuutti Kotivuori <naked at iki.fi> wrote:
> Hi,
>
> One of the first things I'd like to do with my Neo1973 is to configure
> the GPRS connection to be always on.
>
> As I've understood, on the GSM level, the GPRS connection gets paused
> on text messages and incoming calls - but the GPRS call can still be
> resumed. On answering a call or making a call yourself, I take it that
> the GPRS call will get disconnected. Did I get this part right? Or is
> there a way to keep GPRS alive over voice calls? Or do text messages
> disconnect the GPRS connection?
>
> On the actual software level, I guess this means that PPP will get
> disconnected on voice calls, so the 'ppp0' device will go appear and
> disappear and possibly change IP-addresses on every disconnection as
> well. Is there any way to have the device survive disconnections?
>
> I ask this because there's going to be some complications from
> that. Firewall is no problem as it can be static, but QoS rules will
> need to be re-instantiated on if-up scripts. Also, any applications
> binding specifically to an interface will need to be able to handle
> the interface going up and down.
>
> My main goal is to have Neo1973 have internet connectivity at all
> times - but it would be nice to allow access to the internet via
> Neo1973 for other devices as well. However, this should not disrupt
> the connectivity for the device itself. So the device has to keep a
> private network for other devices and NAT the connections.
>
> USB-networking is probably no problem since it shows up as a normal
> ethernet device on both ends. But how to do Bluetooth networking? One
> choice would be to do Bluetooth PAN. This would require 'pand' and
> modules on the Neo1973 side. The device should be configured as a
> Bluetooth NAP, I guess. The other choice would be to use Bluetooth
> DUN. This would require running 'dund' and a PPP server on the
> device. Bluetooth DUN is quite a common use case for all sorts of
> mobile devices - Bluetooth PAN sounds like nicer setup though.
>
> So, I'm asking for input on these issues and I'm interestested as to
> how much of this is already available on the device and how much work
> would setting all this up be.
>
> Thanks in advance,
> -- Naked
>
>
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