Re: [802.21] Comments on 21-06-0698-01-0000_IP_configuration_methods_IE.doc
Good discussion and effort Yoshi,
For further details, we may have to clarify each facility like below:
- IP Address Configuration Method IE
- DHCP Server Address IE
- HA/FA Address IE
Let me answer on the first IE among IP_Configuration_Methods_IE.
As I explained in SD, the existing flag of PoA Capability IE is not
sufficient since there is no any explicit information in order to
prepare what kind of IP address configuration will happen while
attaching a new PoA. For example, even the mobile station has a PoA
Capability IE=IPv6, the mobile station based on the existing IP
stack/RFC will trigger Router Solicitation message (after listening
Router Advertisement for a while) in every time regardless of DHCPv6
availability (It means there is no RS/RA capability). That causes lots
of delays for the IP configuration when in motion. Simple extension of
21 IE can resolve these problems in mobile environment. If the mobile
station has a PoA Capability IE=IPv6 & DHCPv6, then the mobile station
will trigger DHCPv6 Solicit message immediately instead of RA or RS
message for its own IP configuration method. I guess it's clear
concept. Isn't it ?
On 8/5/06, Yoshihiro Ohba <yohba@tari.toshiba.com> wrote:
> I had a discussion on the contribution with Bernard Aboba.
>
> Clarification on the benefit of the proposal is needed. If the goal
> is to allow the mobile station to choose between points of attachment,
> then existing PoA Capability IE (carring flags for IPv4 support, IPv6
> support, etc.) may be sufficient. Detailed IP configuration
> information can be determined using standard IP protocols after
> handover.
>
> Best regards,
> Yoshihiro Ohba
>
--
Daniel (Soohong Daniel Park)
Mobile Convergence Laboratory, SAMSUNG Electronics.