Re: [RRG] Re: Mobility in the future

[ksriram@nist.gov]

I imagine there will be a lot of real-time (interactive) video over IP
or broadcast IPTV applications as well reaching out
to mobile devices (laptops, iphones, etc.).
For such applications a few seconds delay would not be acceptable
when the connection requires seamless mobility from one Wi-MAX cell to another
or from Wi-MAX to WLAN, etc. 

Sriram
http://www.antd.nist.gov/~ksriram/


Quoting Tony Li <tli@cisco.com>:

> 
> On Dec 6, 2007, at 6:27 AM, Russ White wrote:
> 
> >> I agree.  An ITR-ETR scheme with mapping updates which take a few
> >> seconds to be implemented in all ITRs provides a whole new global
> >> system for highly optimised mobility - for both IPv4 and IPv6, with
> >> few new host requirements.
> >
> > But.... A few seconds is probably too long for it to be useful in a
> > mobile environment.
> 
> 
> A few seconds is more than sufficient to deal with a number of  
> portability and migration use cases.  In particular, anything that is  
> quick enough so that TCP connections don't break is extremely  
> interesting.
> 
> This isn't to say that this type of delay is acceptable for all  
> mobility use cases.  You'd probably be pretty upset if your cell  
> phone cut out for two seconds at the edge of every cell.  However,  
> for cases where your laptop transitions from WiFi to wired Ethernet,  
> a few seconds to transition seems eminently doable and beneficial.
> 
> Tony
> 
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