RE: [DNA] Considerations for DNA Schemes with multiple InterfaceandLayer 2 Technologies

[YGHONG <yghong@etri.re.kr>]

 Hi.. Brilesh Kumar..

 My understanding for current DNA scheme is that a host can determine the
change of link 
only after a new link-layer connection is made and it receives link
information when the change 
of link-layer connection happens.

 If a host can have the ability to make a new link-layer connection before
an old link-layer connection 
is disconnected (make-before-break), I think that the host can determine
whether link is changed 
before it receives RAs through a new link-layer connection from routers. . 
(To do this, Access Points (or Base Stations) must be tightly interacted
with routers (PDSNs) 
like CDMA packet service.) 
Actually, in CDMA, L3 information in not necessary when moving between Base
Stations which are 
connected to same PDSN. The host can directly use same IP configuration
because it knows that 
link is same by L2 information 

I think that current DNA schemes are sufficient for currently used L2
technology such as Ethernet or WLAN.
If we consider other (existing and future) wireless technologies, how about
considering this fact?

Yong-Geun..



> -----Original Message-----
> From: Brijesh Kumar [mailto:kumarb@research.panasonic.com] 
> Sent: Saturday, October 23, 2004 2:53 AM
> To: JinHyeock Choi; greg.daley@eng.monash.edu.au
> Cc: YGHONG; dna@eng.monash.edu.au; ???; ???
> Subject: RE: [DNA] Considerations for DNA Schemes with 
> multiple InterfaceandLayer 2 Technologies
> 
> 
> Yong-Geun;
> 
> Like JinHyeock and Greg, I am too curious why CDMA soft 
> handoff should impact the DNA scheme specially since CDMA 
> provides make before break ability.
> 
> Since with CDMA, it is possible to combine the data received 
> from two or more different sites to ease the transition from 
> one to the other, I am unable to see why this will have any 
> DNA issues at all.
> 
> Can you please elaborate a little bit more clearly.
> 
> Cheers,
> 
> --bk
> 
> 
> 
> 
> 
> 
> 
> > -----Original Message-----
> > From: owner-dna@ecselists.eng.monash.edu.au
> > [mailto:owner-dna@ecselists.eng.monash.edu.au]On Behalf Of 
> JinHyeock 
> > Dear Yong-Geun
> >
> > I think that the case 3.2, 'Single interface with Make before Break'
> > will affect DNA solution design. I agree that we are not 
> familiar with 
> > this case, so it would be of much help, if you elaborate the below 
> > with more detail.
> >
> >      We think that we are not familiar with this case. But 
> in CDMA[7], a
> >      mobile station can access two or more different base stations
> >      simultaneously. In this case, a host can make a new link-layer
> >      connection before an old link-layer connection is torn down.
> >
> > Especially I wonder whether it's possible for a host to distinguish 
> > the IP packets from the old link-layer connection FROM the 
> ones from 
> > the new link-layer connection.
> 
> 
> 
> 
> >
> > However, it's not clear to me the relationship between 'DNA schemes'
> > and 'multiple interfaces' from Case 3.3 & 3.4 description. I still 
> > can't see how multiple interfaces would affect DNA schemes 
> > substantially. Kindly elaborate this more.
> >
> > Thanks for your kind consideration.
> >
> > Best Regards
> >
> > JinHyeock
>