Re: [Geopriv] HELD and persistent TLS connections in emergency calls

[Henning Schulzrinne <hgs at cs.columbia.edu>]

I suspect that location usage will be fairly constant and common. For an 
interesting article on using location on cell phones, see the recent 
issue of Pervasive Computing on Navitime (http://www.navitime.co.jp/), a 
pedestrian navigation system. Given the update frequencies needed, HELD 
(or DHCP) is extremely unlikely, however. My guess is that in a few 
years, many cell phones will be using GPS more or less continuously, for 
either in-vehicle navigation with traffic alerts or, in countries with 
usable public transportation systems, for commute optimization.

Hannes Tschofenig wrote:
> Hi Brian,
>
> I agree that this is a challenging question.
>
> I believe for a cellular access network it is challenging to 
> periodically fetch location information (given that you may only have an 
> emergency call once in your lifetime) and to keep a TCP connection up 
> and running all the time.


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