Re: draft-yegin-ip-mobility-orchestrator-00.txt

Alper,

I had a quick read on the document. There are few places that I need 
clarification for my own education.. since I have a feeling that the 
text does not say everyting it assumes a priori. Furthermore, I got some 
more editorial comments.

Section 3. says:

    Solutions operating above the IP layer include MPTCP, SCTP, SIP, and
    application-specific ones.  Availability of these protocols cannot be

I would add references to SCTP and SIP specifications that actually add 
the handover functionality to the listed protocols. Also, there could be 
more protocols to add like DCCP..

During the handovers are multiradio cases ruled out or also applicable 
or even assumed? I cannot see that clearly from the motivation or 
solution part.

Section 4.1. says:

    data-path optimization.  On the other hand, above-IP solutions
    provide data-path optimization but fail to provide seamless
    handovers.  The ideal solution would be based on coordianted

I do not agree this fully. "Above-IP solution" allow seamless handovers 
in cases where you can have multiple radios on simultaneously.

In Figure 2. and the related text:

What is unclear to me is s-GW would keep the IP1 when the MN attaches to 
t-GW. What is the background assumption here? Is MN attached to both GWs 
simultaneously?

- Jouni


7/4/2014 10:10 AM, Alper Yegin kirjoitti:
> Hello DMMers,
>
> We have a new I-D for your reading and discussion.
>
>   Title           : IP Mobility Orchestrator
>   Authors     : Alper Yegin
>                        Jungshin Park
>                        Kisuk Kweon
>                        Jinsung Lee
> Filename   : draft-yegin-ip-mobility-orchestrator-00.txt
> Pages         : 13
> Date            : 2014-07-03
>
> Abstract:
>    Host stacks can support mobility at multiple layers.  Mobility
>    protocols operating at different layers constitute alternate
>    solutions with various pros and cons, and they can also have adverse
>    affects on each other when used simultaneously.  Optimal results in
>    terms of seamless handover and data-path optimization can be achieved
>    when execution of these protocols are coordinated.
>
> We'll also be submitting an IPR statement to IETF.
>
> https://datatracker.ietf.org/doc/draft-yegin-ip-mobility-orchestrator/
>
> Please review this I-D and share your comments.
>
> Thanks,
>
> Alper
>
>
>
>
>
>
>
>
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