Re: [MEXT] New Text for home link detection in RFC3775bis
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Re: [MEXT] New Text for home link detection in RFC3775bis



Hi Fan,
  Sounds like a good idea.

Cheers
Suresh

fan zhao wrote:
Hi Suresh,

I have a quick comment:
the Home Link Detection is not only performed during handover,
but also during initial attach. The new text is proposed into section
11.5.4.  "Returning Home", which seems to me that the new text
only applies to the handover case.

Therefore, my oponion is to have a new (sub)section called "Home Link
Detection" somewhere, and refer to this new section in section 11.5.4.
What do you think?

Sincerely,
fan

On Wed, Jul 2, 2008 at 7:21 AM, Suresh Krishnan
<suresh.krishnan at ericsson.com> wrote:
The WG had consensus to fold in text from draft-krishnan-mext-hld into
RFC3775bis. Here is the proposed text for doing so. Feel free to edit.



This change is made in Section 11.5.4

OLD TEXT
========
  A mobile node detects that it has returned to its home link through
  the movement detection algorithm in use (Section 11.5.1), when the
  mobile node detects that its home subnet prefix is again on-link.

NEW TEXT
========
  When an MN detects that it has arrived on a new link using the
  movement detection algorithm in use (Section 11.5.1) it performs the
  following steps to determine if it is on the home link.

  o  The MN performs the procedure described in Section 11.5.2 and
     configures an address referred to as the Current MN Address (CMA).
     It also stores all the on-link prefix(es) received in the RA along
     with their prefix lengths in a conceptual list called the Current
     Link Prefix List (CLPL).

  o  If the home prefix has been statically pre-configured on the MN
     it checks if the home prefix matches one of the prefixes in the
     CLPL. If it does, the MN concludes that it has returned home.

  o  If the home prefix has not been statically configured the MN uses
     some form of bootstrapping procedure (e.g. RFC5026) to determine
     the home prefix. It then checks if the home prefix matches one of
     the prefixes in the CLPL. If it does, the MN concludes that it has
     returned home.

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