Re: [MEXT] Multiple Revocation Triggers for handovers

["Ahmad Muhanna" <amuhanna at nortel.com>]

Hi Vijay,

These map quite good to the HI as per PMIPv6 base protocol RFC5213.
IMO, there is nothing wrong of keeping them. We are not running out of
space. 

On the other hand, "Inter-MAG - Unknown Handoff" handling is a little
different because in PMIPv6 base protocol, when the LMA receive a HI
"Unknown", the LMA would start a timer until it receives a
de-registration from the previous MAG. If LMA does not receive
de-registration, then the LMA will assign a new HNP. This way LMA may
speed the process by sending a BRI to the MAG and the MAG validates if
the MN is attached or NOT. If NOT it sends a successful BRA and that
could be considered in place of de-registration and the LMA can assign
the same HNP to the new PBU coming from the new MAG.


Regards,
Ahmad
 

> -----Original Message-----
> From: Vijay Devarapalli [mailto:vijay at wichorus.com] 
> Sent: Tuesday, March 24, 2009 6:01 PM
> To: Muhanna, Ahmad (RICH1:2H10)
> Cc: mext
> Subject: Multiple Revocation Triggers for handovers
> 
> Hi Ahmad,
> 
> Do we really need all three of the following revocation triggers?
> 
>           3  Inter-MAG Handoff - same Access Types
>           4  Inter-MAG Handoff - different Access Types
>           5  Inter-MAG - Unknown Handoff
> 
> Isn't it sufficient for the LMA to tell the old MAG that is a 
> handover and that is why it is revoking the binding? Why 
> should the old MAG care about what kind of handover it was? 
> How does it use this information?
> 
> I suggest having just one revocation trigger that says 
> "Inter-MAG Handover".
> 
> Vijay
>