1. IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN:
Title: Liaison Report – Work Related to
Date Submitted: January 19, 2006
Presented at IEEE session in Hawaii
Authors or Source(s):
David Hunter
Abstract: r is developing the amendment for Fast BSS Transitions. This amendment will become a requirement for operations with
David Hunter
Panasonic
January 19, 2006
January 19, David Hunter, Panasonic

2. IEEE 802.21 presentation release statements
This document has been prepared to assist the IEEE Working Group. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE
The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual < and in Understanding Patent Issues During IEEE Standards Development
David Hunter
Panasonic
January 19, 2006

3. Liaison Report IEEE 802.11 work most related to 802.21
David Hunter
Panasonic
David Hunter
Panasonic
January 19, 2006

4. 802.11 Groups Related to 802.21 (the usual suspects)
802.11k – Radio Resource Measurement
Measurements provided for runtime adjustment of radios
Available to internal STA components, higher layers, and external devices
802.11r – Fast BSS Transition
Between BSSes within the same ESS
Interacts with k (especially neighbor reports)
802.11u – Interworking with External Networks
MAC changes to accommodate, among others,
Depends on k and r
802.11v – Wireless Network Management
Management protocol additions
AP-AP negotiations; load balancing; additional access controls
Interacts with k
802.11w – Protecting Management Frames
Security for management frames, including broadcast frames
Depends on r and perhaps u
David Hunter
Panasonic
January 19, 2006

5. 802.11r Background
Fast Transition: optional capability of APs and STAs
TAP = Fast Transition Enabled AP
TSTA = Fast Transition Enabled STA
Five stages of BSS – BSS transition:
Scanning – active or passive for other APs in the area
Authentication with a (one or more) target TAP
Re-association to establish connection at target TAP
Have a connection, but still can't *DO* anything…
PTK derivation – 4-way handshake of session keys
QoS admission control to re-establish QoS streams
Current work: exactly how are keys moved around?
Including new IP-based protocol(s)
David Hunter
Panasonic
January 19, 2006

6. 802.11r Letter Ballot
November: issued Amendment Draft 1.0 for Letter Ballot
Voting results:
518 : Voter Pool 268 : Approve   64 : Disapprove   72 : Abstain 404: Total Votes Cast Return Ratio: 78.0 % This return ratio is valid if it exceeded the 75% acceptance level (518 Voters) Ballot Approval: 80.7 % With this result the balloted draft passed both the 75% approval level and the 75% return ratio acceptance level per the WG P&P
David Hunter
Panasonic
January 19, 2006

7. 802.11r This Session Comment Resolution Received 1287 comments
And more comment resolution
Received 1287 comments
911 were editorial and minor technical points
Over 1100 (including the 911) were resolved this week
Remainder left to teleconferences
Only 78 comments – about 6% -- remaining
However, these are the most difficult comments
Currently r is deciding whether to have additional ad-hoc meeting to cover these
David Hunter
Panasonic
January 19, 2006

8. 802.11r This Session, 2 Many small changes all over the place
New MLME SAP for MAC-RRB exchange
How PMK-R1 keys are distributed within a Mobility Domain
Requesting new IEEE Assigned Numbers
Auth Algorithm, Status Codes, Management Action Code, Element IDs, AKM suite selector types
List in r-request-assigned-numbers.ppt
RIC management changes
But some failed
Coverage of MIC calculations to cover Vendor Specific IEs
David Hunter
Panasonic
January 19, 2006

9. TGr Key Hierarchy - Just a Reminder (stolen directly from document r-key-holder-protocol-requirements.ppt)
AAA Server
MSK
MD-ID = MAC Address of MDC
Mobility Domain
Controller
MDC manages keys for distributing PMK-R1; Authorization, Identity and Attestation of Authenticators
R1KH-ID
R0KH-ID
R1KH-ID
PMK-R0
PMK-R1
AP3
AP1
AP2
TSTA
TSTA
David Hunter
Panasonic
January 19, 2006
January 19, David Hunter, Panasonic

10. 802.11r Current Status New Drafts Draft 2 will go to Letter Ballot
Intermediate one issued this meeting
Next will come after the teleconferences
Draft 2 will go to Letter Ballot
Will be generated after teleconferences
See also r-d1-0-comment-resolutions.xls
Continuing Issues:
How to manage key transfers
New L3 (and above) functionality from the IETF
Key Transfer Protocol Working Group:
How to securely transfer PMK-R1 key from R0KH to R1KH
Tending toward Kerberos work (vs. EAP version, IKEv2, etc.)
David Hunter
Panasonic
January 19, 2006

11. 802.11r Timeline Comment resolution slow IETF support
Typical problem: the moment the document goes to letter ballot, most of the contributors move to another group
802.11r comment resolution now being done by about 10 core people
While the comments were made by 404 voters
Will finish comments by March Plenary and issue new Letter Ballot
IETF support
Key Management
Goal is to have a new RFC issued within a year
Limitation: cannot complete before am completes
Also has k dependencies that may have to be backed out if 802.1k doesn’t finish
Working hard to avoid w dependencies
Sponsor ballot still expected before sponsor ballot
David Hunter
Panasonic
January 19, 2006
January 19, David Hunter, Panasonic