1. 21-06-0715-00-0000 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-06-0715-00-0000 Title: Liaison Report – 802.11 Work Related to 802.21 Date Submitted: July 20, 2006 Presented at IEEE 802.21 session 15 in San Diego Authors or Source(s): David Hunter Abstract: 802.11r is developing the 802.11 amendment for Fast BSS Transitions. This amendment will become a requirement for 802.21 operations with 802.11.

2. 21-06-0715-00-0000 IEEE 802.21 presentation release statements This document has been prepared to assist the IEEE 802.21 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 802.21. 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 http://standards.ieee.org/board/pat/guide.html> Section 6.3 of the IEEE-SA Standards Board Operations Manualhttp://standards.ieee.org/guides/opman/sect6.html#6.3 http://standards.ieee.org/board/pat/guide.html

3. 21-06-0715-00-0000 Liaison Report IEEE 802.11 work most related to 802.21 David Hunter Panasonic hunter@timefactor.com

4. 21-06-0715-00-0000 802.11k – Radio Resource Measurement Measurements provided for runtime adjustment of radios Available to internal STA components, higher layers, and external devices 802.11m – Maintenance (compilation of all approved amendments) In Sponsor Ballot Draft 8.0 is being created and going out for re-circulation sponsor ballot One interpretation request was made: RTS/CTS-fragmentation Response is that current 802.11 standard is unambiguous 802.11r – Fast BSS Transition Between BSSes within the same ESS Relies on 802.11k (especially neighbor reports) 802.11u – Interworking with External Networks MAC changes to accommodate, among others, 802.21 Relies on 802.11k and 802.11r; has scope agreement with 802.11v Joint meeting with 802.21 this week 802.11v – Wireless Network Management Management protocol additions AP-AP negotiations; load balancing; additional access controls Relies on 802.11k 802.11w – Protecting Management Frames Security for management frames, including broadcast frames Relies on 802.11k, 802.11r and perhaps 802.11u 802.11 Groups Related to 802.21 (the usual suspects)

5. 21-06-0715-00-0000 802.11u This Session (very quick overview) This week: presentations for all TGu Clusters Liaison letters being prepared for: 3GPP SA3 ETSI TISPAN TIA TR41 Downselection steps being run on the proposals Goal: one proposal surviving for each cluster Most competing complete proposals merged into a single proposal for each cluster Only a couple of proposals remain undecided But 802.11u will not be going to Letter Ballot now Still have debate open on MIH support and Network Selection clusters

6. 21-06-0715-00-0000 802.11r This Session Issued another re-circulation ballot after March Plenary 87% approval rate 1494 comments (some repeats from previous letter ballot) Drafts Have issued new Draft 2.2 in this session Did not issue new Draft 3.0 for a new re-circulation ballot This round of comment resolutions ran into stalemate Again held an additional ad-hoc meeting and several teleconferences 95+% of comments have now been resolved Current responses are in 11-06-0537-25-000r-d2-comments.xls However, no agreed resolutions on a few comments Majority but not 75% of voters in favor of particular proposals

7. 21-06-0715-00-0000 802.11r This Session, 2 Controversy #1 Need for state machines /diagrams in the amendment Claim: these are needed in order to determine / explain the required interoperable features Minority of voters prevented resolution of a number of comments until ad- hoc time was given from meeting schedule Current decision is to hold an August ad-hoc meeting –Since few comments remain unresolved, state machines will be a primary topic of this meeting Controversy #2 Pre-reservation proposal Related comment resolution failed: vote barely less than 75% Earlier draft text remains the same Note: an AP does not have to actually reserve bandwidth –Even when it acknowledges a reservation request –Allocation process is a function internal to the network management functionality inside the AP –So an AP can do some playing with statistics internally and (if successful) still provide full interoperability with all standard STAs and APs

8. 21-06-0715-00-0000 802.11r This Session, 3 Controversy #3 Proposal to bring back Make Before Break Was downselected 3 years ago Make a partial connection with a new AP without dropping the connection with the old AP. The partial connection would then allow full negotiations between STA and AP to establish security associations and resource reservations. 802.21 should be aware that this proposal may create many more possible states for a STA to be in at the time that it is handed over to an external network Initial vote to add this to the current text failed Previously had wanted to replace much of current text New proposal is to add this functionality to current draft Majority in favor, but below the required 75% level Probably will be modified again and merger request repeated

9. 21-06-0715-00-0000 802.11r Timeline PAR was approved over 2 years ago Ad-Hoc Meetings August 22-24, at Santa Clara, California (Intel sponsoring) October 17-19, location TBD Circulations Probably next recirculation ballot will be issued in September Possible (but not probable) to go to Sponsor Ballot in November Limitations IETF support : Key Management Goal is still to have a new RFC issued within a year Dependent on 802.11am 802.11am is in Sponsor Ballot Another recirculation Sponsor Ballot is being issued after this meeting 802.11k dependencies may have to be backed out if 802.1k doesn’t finish Key point: 802.11r sponsor ballot still before 802.21 sponsor ballot