Aug ‘95 MAC group Report
Aug Goals from July 95
•	Process D2.0 LB comments (if any...)
•	Complete work on Section 8.
•	Outline Conformance Statements to correspond to D2.0, flesh out to match D2.0.
Misc Subjects
•	July MAC minutes approved
•	Carolyn took minutes this week
This Week’s Work Summary.
Papers (numerical order)
•	137R1 - ad hoc pwr mgt (improved)
•	182 - rts/cts authors not present at mtg - univ Berlin
•	183 - modified backoff algs - univ Berlin
•	187 bumps on road to privacy - mike F
•	188 how far should an ESS extend - mike f
–	not presented
Full MAC group actions
•	No official votes due to pending LB
•	Many recs in small papers to be avail ASAP for reference in LB comments.
IBSS pwr mgt
•	Consensus is for this feature, details of mechanism to be in 95/137R2 from Rick White.
MAC Conformance stmts.
•	Simon to create straw man, mike F to help.
•	Doc 95/202 will be avail before Nov mtg.
•	Not expected before LB closes.
6.2.5 Back off times
•	Straw vote to change D2 text to  CWmin = 7, CWmax = 255
–	zero relative values 
–	Values required not suggestions
–	vote: 11, 1, 2
•	Tom B will create doc 95/207 and dist for LB reference.
•	Mike F; ref to ftp:/ftp.cs.toronto.edu/csri-technical-reports/298
–	his is enet capture effect paper
802.11 decisions made but not edited into D2.
•	Connection mgt stuff hanging around
–	Mike F will email as 95/212 for LB comment reference.
•	WEP MSDU vs MPDU
–	WEP IV drawing edit correction also in 95/212.
–	Superseded by 95/196 (WEP MSDU vs MPDU)
•	Format & figures in Clause 4
–	TIM diagram out of date (4.3.2.1)
6.2.6.3 retry limits
•	6.2.6.3 modified to correct motivation for mib vars in sec 8 re retry limits.
•	95/201 will be this proposed text for LB comment.
–	 (bob Ohara, TOm B)
frag vs dwell boundary
•	Worth doing frag adjustment to fit remaining dwell time?
•	Rec: Use fixed frag size of A_fragmentation_threshold per MSDU (except for last frag).
•	straw poll:
–	accept rec: 11
–	leave D2 as is: 3
•	Mike F will write up in doc 95/206 people can cite if they like in LB comments.
state machine known limitations
•	text vs state machine.
•	group drafts Mike and Johnny
•	95/199 will be further updated state machines - avail before LB closes (9/10 prob)
Multi-rate desc inadequate.
•	probs identified:
–	unclear language re unicast data and/or mgt frames at any rate in last para sec 6.6.
–	state transition R41b - plcp header is ok, but rate indicated is not one the phy supports, what to do?
•	no consensus, people to consider and make LB comments.
WEP: MSDU vs MPDU revisited
•	Rec: to reconsider MPDU decision and change back to MSDU.
–	several strong MSDU supporters and a couple fence sitters, no strong MPDU supporters
•	DB to include in 95/196 for LB reference.
–	Will ref paper 95/187 for background, new paper will be changed text only.
WEP: ICV alg
•	Probable rec: change back to CRC-16 from CRC-32
•	DB: to put in 95/197 for LB reference.
–	will ref mike’s’ paper 95/187 for background, new paper will be changed text only.
•	late breaking consideration: San Jose 95/06 minutes:  Kerry Lynn says 32 bits is shortest ICV that govt will accept for export
•	This may nullify rec above.
–	DB to check with Kerry Lynn.
WEP: Non-accept of non-WEP Data frames MIB toggle
•	Mike F to create 95/198 for LB reference.
–	will ref paper 95/187 for background, new paper will be changed text only.
WEP: Multiple default key support
•	95/187 prob 4 for background info
•	straw poll support to ask Mike F to write up text for people to review - Doc 95/211 for LB reference
•	straw vote: 8, 1
Spec when to set To-DS bit.
•	Summary: When bit set not speced.
•	Issues: 
–	Try direct first vs. try AP first;  mandate or not?
–	some want speced, some do not.
–	TO-DS bit definition not the issue, when to invoke is.
•	no consensus after three attempts.
Uncompress TIM?
•	Straw poll:
–	Wim’s proposal uncompress and delete trailing zeros: 5
»	doc 95/208 for LB reference
–	Johnny’s modification - delete leading and trailing zeros: 6
»	doc 95/209R1 for LB reference
–	Leave D2 alone: 0
•	Note, side discussion: people also concerned re interaction with SID allocation strategy (not speced in D2).
How are beacon interval times coordinated in an ad-hoc net?
•	Done as side effect of ad-hoc pwr mgt paper see 95/137R2 for LB reference.
Assoc / Reassoc relation
•	DB will correct in 95/203 for LB reference
Combine auth and assoc functions?
•	Proposal: Combine Auth frame contents into Assoc and Reassoc frames, leave auth frames.
•	Straw poll:
–	For proposal: 2
–	Leave D2 as is: 10
Association - different states between stations.
•	REC: add sentence:
–	If  STA 1 receives a class 3 frame from STA 2 which is not associated with the STA 1, STA 1 shall send a Disassociation frame to STA 2.
•	Straw poll to adopt: 7, 0, 0
•	DB to put in paper 95/210 for LB reference.
TSF timer alg problem 
•	Much discussion.
•	NO consensus.
•	Beacon / Scanning / BSS joining / BSS creation
•	Problem with PHY specs re time reference.
–	reef 11.3.3.1.2
•	more research needed, ripe area for LB comments.
multi-MSDU handling
•	should min req for multi simul MSDUs be > for APs than STAs?
–	Straw poll
–	For reducing to < 6: 1
–	For leaving as is: 12
•	what happens if implemented limit exceeded? 
•	need to spec behavior?
–	straw: Need to spec behavior: 
»	first straw: 8, 3
»	2nd straw: 4, 6, 
•	diverging consensus
•	left for indv LB comments
What to do if data frame not recv in time after poll?
•	much discussion....
•	noting useful to capture from this discussion.
State machine known limitations
•	Clause text vs state machine.
•	Group drafts Mike and Simon and Johnny
•	95/199 will be further updated state machines - avail before LB closes (9/10 prob)
Status code fill in
•	Tom B started effort.
•	Will be in 95/213 for LB reference.
LB reference papers summary
•	95/137R2 - IBSS pwr mgt
–	Simon
–	avail later today
•	95/196 - WEP: MSDU vs MPDU revisited
–	Dave B
–	done
•	95/197 - WEP: ICV alg
–	Dave B
–	sometime next week
•	95/198 - WEP: Non-accept of non-WEP Data frames MIB toggle
–	Mike F
–	today 
LB reference papers summary
•	95/199 - state machine known limitations removal
–	Mike F
–	Hopefully avail before LB closes, prob not until 9/10
•	95/201 - 6.2.6.3 retry limits
–	Bob Ohara, Tom B
–	already distributed
•	95/202 - MAC Conformance stmts.
–	Simon, Mike F
–	Not expected before LB closes.
•	95/203 - Assoc / Reassoc relation correction
–	Dave B
–	done
LB reference papers summary
•	95/206 - frag vs dwell boundary
–	Mike F
–	distributed 
•	95/207 - 6.2.5 Back off times
–	Tom B
–	done
•	95/208 - Uncompress TIM / trailing zeros.
–	Wim
–	done
•	95/209R1 - Uncompress Tim / trailing & leading zeros.
–	Johnny Z
–	done
LB reference papers summary
•	95/210 - Association: different states between stations.
–	Dave B
–	done
•	95/211 - WEP: Multiple default key support
–	Mike F
–	later today
•	95/212 - Connection mgt stuff hanging around  in D2.
–	Mike F
–	done
•	95/213 - Status code fill in
–	Tom B
–	Tom will let vic know
Goals for Nov 95
•	Quick votes on LB reference papers
–	No extended discussion, < 5 min each subject.
•	Process all D2 LB comments.
•	Review initial MAC PICS Proforma
MAC group report 
•	That’s all for now...