[maemo-users] Nokia device usage

From: John Holmblad jholmblad at acadiasecurenets.com
Date: Tue Mar 10 03:51:12 EET 2009

the term "3g radio" is a fairly broad term. The key is what software is 
going to be in the new G4 IT above the radio/physical layer.  It would 
make sense, especially if Nokia decides that the G4 IT is going to go 
after the market served by the iphone, to  give the G4 IT, full 2G/3G 
voice functionality in addition to  HSDPA. The rub here with such a 
decision may be the impact on the product cost of having to use a 
presumably more expensive radio of the kind that are contained in 2G/3G 
dual mode handsets. I would think that for a product released in 2009 2G 
support would still be essential.

On the other hand, if Nokia is not planning to make the G4 IT into a 
full mobile smartphone (as we know such devices today) then my surmise 
that, in the case of the G4 IT, there will NOT be a 2G/3G radio nor will 
there be the software to support  all the voice call handoff/roaming 
that is contained in a regular 2g/3g mobile phone. Rather the software 
will rely on SIP endpoint services such as are contained in the current 
G3 IT and will utilize the underlying (unreliable best effort) IP 
service capability layered on a HSUPA radio layer to agnostically 
(voice, data,who cares as long as it is in a packet)  move the voice UDP 
packets end to end over the mobile service provider's network. One 
consequence of this approach, is that, for such voice traffic 
originating/terminating on a G4 IT, the 3G radio base stations inside of 
the mobile service provider's network would NOT have to be concerned 
about voice call handoff from base station to base station in the case 
of a user that is in motion. The base stations would only need to 
concern themselves with handing off an (unreliable by definition) IP 
interface from one BS to the next. Only the SIP endpoints would be aware 
of the voice connection.

Related to this, today I learned that a consortium of mobile industry 
participants (mostly infrastructure equipment providers) just today 
announced yet another "forum" called the  VOLGA forum (no relation to 
the Volga River) to

    ".....enable mobile operators to deliver mobile voice and messaging 
services over LTE access networks based on the existing 3GPP Generic 
Access Network (GAN) standard."

VOLGA in this case stands for "Voice Over Lte via Generic Access" and a  
"Generic Access Network"^1 is a network that uses IP at its core (e.g. 
one based on IEEE 802.11 a/b/g wireless)for transport).

Here is the url to the www page for the VOLGA www site:


Now I thought that the LTE standards framework as defined by the 3GPP 
had already solved the very basic question of how to convey mobile voice 
and messaging over LTE but clearly I was wrong.

Obviously  this VOLGA group has some new and/or different ideas of how 
to utilize LTE infrastructure using GAN principles to convey voice and 
SMS over a 4g network. different, that is,  from  the method that is 
already contained in the 3GPP LTE standards framework.

Since there are no spec's yet published on this www site from this forum 
it is impossible to say for sure but, based on my reading of what GAN is 
all about,  my gut tells me that VOLGA is a "voice over packet" solution 
similar to what I surmised above and that this solution  is somehow 
different from whatever "voice over packet" solution is already 
contained in the 3gpp standards.

I suspect that what is going on here is that,  as the commercial reality 
and success of VOIP and SIP trunking service providers (aided and 
abetted by the fantastic success of the proprietary protocol based SKYPE 
service) seeps in to the minds of the world's mobile network planners, 
these planners from within the mobile service providers, handset 
providers, and infrastructure providers are all rethinking how to most 
cost effectively evolve the world's mobile networks to 4g.

I do find it interesting that, with respect to the VOLGA forum, although 
the infrastructure providers Alcatel-Lucent, Nortel, Ericsson and ZTE 
are involved, there is no mention of Nokia-Siemens Networks as a member.

1. http://en.wikipedia.org/wiki/Generic_Access_Network

Best Regards,


John Holmblad


Acadia Secure Networks, LLC

* *

Jean-Christian de Rivaz wrote:
> Andrew Flegg a écrit :
>> On Sat, Mar 7, 2009 at 8:59 PM, Jean-Christian de Rivaz <jc at eclis.ch> 
>> wrote:
>>> I don't understand why the next tablet will not be able to make regular
>>> phone call, since it will have 3G link. It's a non sense.
>> You seem awfully sure about the features of a device which has yet to
>> be announced, let alone released.
>> Perhaps such certainty should be held in check until an announcement
>> is actually made about what the RX-51 and RX-71 *are*?
> Of course I can be wrong. I just read news from Maemo site:
> http://maemo.org/news/internet_tablet_talk/dr-ari_jaaksi_on_maemo_5/
> --------------------
> Dr. Ari Jaaksi has just finished his keynote speech over at OSiM, 
> revealing a lot of juicy stuff on the future of Maemo. Check out the 
> the upcoming Maemo 5 (5th generation) highlights:
>     * online anywhere with cellular connectivity over HSPA for 
> broadband anywhere
>     * powerful computing with TI OMAP3 processor - for better 
> performance and better graphics performance
>     * photo sharing with hi-def camera - imaging and photo-sharing
>     * Nokia is now Gold Sponsor of Linux Foundation, has contributed 
> code today for 3G/HSPA cellular (data) connectivity for OMAP3 to Linux 
> kernel
>     * no news yet on backward compatibility for older devices
> --------------------
> From what I can find on the net, HSPA seem to be an extend of the 3G. 
> So it seem logical to me that the next tablet will have 3G radio.
> Best regards,

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