[Mobopts] Re: [Mip6] Delay Analysis for Handoffs with Mobile IPv6 Route Optimization

[Thomas C Schmidt <[e-mail]>]

Dear Christian,

thanks for bringing your technical report to our attention!

For a comment: it is our experience that the optimistic concept of zero 
handover delay due to predictive procedures does not survive reality.

This is mainly due to

   - the independence of anticipation, signaling and handoff in
     occurrence and timescale.

   - predictions turning out as rather unreliable.

We analysed these properties for the case of FMIPv6 (which should be 
transferable in major parts, e.g., fmip needs fback, you need BU to 
arrive ...) and found no significant improvement by predicitions (see 
bib-reference attached).

Song et al. ([11] in our references) made empirical studies on 
predicitions including the campus geometry, statistical correlation 
analysis of user date ... and arrived at dissapointing 72 %.

It's a nice vision - but sometimes real-world isn't as nice ;)

Best regards,

thomas

Christian Vogt wrote:
> I would like to call your attention on work that we have done on IPv6 
> handoff procedures:
> 
>   "A Comprehensive Delay Analysis
>    for Reactive and Proactive Handoffs
>    with Mobile IPv6 Route Optimization"
> 
> http://doc.tm.uka.de/2006/vogt-2006-delay-analysis-for-reactive-and-proactive-handoffs.pdf 
> 
> 
>   Abstract:  Optimizations to reduce handoff delays
>   inherent in Mobile IPv6 Route Optimization as well
>   as IPv6 router discovery, address configuration,
>   and movement detection have so far been mostly
>   considered on an individual basis.  This document
>   evaluates three integrated solutions for improved
>   handoff experience in surroundings with different
>   preconditions:  reactive handoffs with unmodified
>   routers, reactive handoffs with router support, and
>   movement anticipation and proactive handoff manage-
>   ment.
> 
> Your feedback will be welcome!
> 
> Regards,
> - Christian
> 

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