From: Ronny Kim
[mailto:ronnykim@lge.com]
Sent: Sunday, November 12, 2006
8:50 PM
Subject: RE: [802.21] 802.21 Ad
Hoc meeting (Oct 31, Nov 1-2) details
Hi,
I just noticed that on Monday and Tuesday
evening, we have very interesting tutorials. I guess many people including
myself want to attend.
Vivek, Since Peretz and Ajay are arriving
on Monday evening can you schedule 802.16g related discussion on Tuesday
morning?
After discussion we can finalize the
contribution and submit it to 802.16g before deadline.
Cheers,
- Ronny
From: Peretz Feder
[mailto:pfeder@LUCENT.COM]
Sent: Monday, November 13, 2006
3:25 AM
Subject: Re: [802.21] 802.21 Ad
Hoc meeting (Oct 31, Nov 1-2) details
Vivek, Ronny:
Luckily, the deadline for the 802.16g submission is Tuesday evening at 7:00PM.
So lets have an ad hoc session on Monday evening to work the 802.16g details
below and reach a consensus, which will lead to potential contribution on these
two topics. Ajay and I will arrive on Monday evening and would like to
take part in this discussion.
Michael: Per our NJ discussion, any conclusion on the size of the Information
Services payload that may be transmitted in unauthenticated mode?
Peretz Feder
On 10/31/2006 12:43 AM,
Ronny Yong-Ho Kim wrote:
Thanks
Peretz for bring up the issues and feedback from 802.16 members.
Please refer to comment in-line.
Cheers,
- Ronny
From: Peretz Feder [mailto:pfeder@lucent.com]
Sent: Tuesday, October 31, 2006
1:42 PM
To: Ronny Yongho Kim
Subject: Re: [802.21] 802.21 Ad
Hoc meeting (Oct 31, Nov 1-2) details
Ronny and 802.21 members:
1) During the last 802.16g meeting in Mont Tremblant, the attached
"Fragmentation of MIH-MSG" contributions was not accepted because it was
stated that the main reason the primary management connection is being used for
MIH payload, is its ability to fragment. Since the primary 802.16 flow can
naturally fragment, there is no need to add another fragmentation level.
>From 802.16-2004, section 6.3.2.3: MAC
Management message on the Primary Management Connection may be packed and/or
fragmented.
[Ronny]
This issue is very much related to the issue #2 below. In MIH query/response in
un-authenticated state, there has always been possibility of DoS attack
from un-authenticated users who send hundreds and thousands of initial ranging
messages but in case of accessing information service, BS is allowing a
query from MSs. Of course if BS decides not to accept the query from the MS
then it is okay to MS because MS has not entered the network. Because of
this usage we have to change the usage of MOB_MIH-MSG. This shall be
transported not only primary connection but also over multicast connection.
Primary connection and broadcast connection are no problem because
fragmentation is already supported. Therefore, we need fragmentation in MAC
message level.
2) MIH query/response in un- authenticated state was not submitted, as it could
be a security hole and be used for DoS attacks. I would like to socialize it
among us first. (The amount of data exchanged in
un- authenticated state must be very small, maybe just MIH capabilities
exchange)
[Ronny] This
is one of major benefits of information service, I believe. This has been
discussed tremendously in 802.11u. Because 802.21 information service could be
their perfect solution 802.11u accepted 802.21 Information service in state 1
(un-authenticated state) as their Network Selection scheme. I think this can be
applied to 802.16 network as well. There is a working group called Global
Roaming Working Group in WiMAX. GRWG is looking for solution to similar
scenario. MIH query/response could be one of perfect solution to the network
selection of global roaming.
3) Submission deadline for the next 802.16g meeting in Dallas is Nov 11th.
[Ronny]
We need to reach the conclusion of the issues above first.
Lets decide what we want to do next, Peretz Feder