July2007IEEE 802.11-07/2141r0
IEEE P802.11
Wireless LANs
Date: 2007-07-16
Author(s):
Name / Company / Address / Phone / email
Donald Eastlake 3rd / Motorola / 111 Locke Drive
Marlboro, MA 01752
USA / +1 508-786-7554 /
Contents
Minutes......
Participants......
Minutes
The Chair convened the call at 10:05 EDT
The telecon announcement included the following informational pointers;
IEEE Patent Policy
Patent FAQ
Affiliation FAQ
Anti-Trust FAQ
Ethics
The Chair inquired if everyone was familiar with the IEEE 802 IPR policy and if there were any potentially essential patents, patent applications, or claims about which the 802.11 WG Chair should be informed. No-one indicated unfamiliarity with the policy and no new patents or applications were identified.
The Chair reviewed the proposed Agenda:
1. Attendance
2. IPR and other relevant IEEE policies (see pointers above)
3. Agenda for call
4. Discussion of and presentations for comment resolutions for D1.05 based on 11-07/0023r37 or later
versions if available concentrating on the MAC area.
5. Agenda for San Francisco meeting, 11—07/1976r1.
Update on ad hocs
6. Adjourn
The Chair asked Steve Conner to say a few words about 802.11s. It has been up in the members area for a while, is believe to be fully up to date with the changes adopted by TGs, and has been corrected for a few minor errors in changes that Steve has been told about.
Presentation: "Overview of Abbreviated Handshake Protocol", Michelle Gong, 11-07/2095r0
Presentation / questions / comments . . .
Adds two bits per MP where there is currently only one PS supportable bit
Add wakeup bit to path selection messages
Q: Wake up? To set up an awake path?
Set wakeup in PREP
Battery operated MPs would not participate if wakeup 0 in routing messages.
Message not buffered for a PS neighbour if they have wakeup 0.
Source of messages decided about wakeup. Could try for a route with wakeup 0 then try again with wakeup 1 if that fails.
If critical battery state is distinguished for routing then the transition to critical must be communicated which implies updating peer links.
Trying with wakeup 0 and then 1 will make it take longer to find routes in some cases. This may be a problem with interworking where failure to find a route means something is outside the mesh, a common case which would be slowed down.
Of course, once things are woken up, there are no delays for a while.
What about adding battery state to path metric? That could be done but is outside the scope of this presentation.
Whether a station is on mains power or battery seems fairly static while battery critical/non-critical seems more dynamic. RA-OLSR seems like a better way to distribute dynamic information.
People don’t want path selection complexity.
Peer link already has to update various things like in/out-of synch, in/out of Power Save.
Is peer link setup frequent enough? There exists on-demand peer link update.
Is that specific to HWMP?
Better to handle in routing to avoid redundancy.
Cost of power save is greater latency.
Should leave communication of status to the path selection guys. OLSR can easily accommodate it but harder for on-demand protocols.
Not disagreeing but HWMP is the default.
Power Save is built on synchronization. Synchronization works best with global synchronization. Global synchronization is hard, local is much easier, but then you can’t do power save between all nodes.
Power save and synchronization were open issues from the recent Hillsboro ad hoc.
We need a common solution.
There are three possibilities: (1) believe that HWMP routing a PS are flexible enough and leave the details out of scope, (2) fully specify the details as in this presentation, or (3) leave HWMP alone but add a separate wakeup protocol to avoid tight coupling between the wakeup and path selection functions.
It would be good to avoid new HWMP requirements.
The chair reviewed the somewhat skeletal TGs agenda for San Francisco. There were no suggested changes.
Michael Bahr reviewed some details of the 1-3 August 2007 Munich, Germany, TGs ad hoc meeting. There were some questions about English/Germany brewery tours on Saturday, 4 August. Those on the call seemed to be content to let Michael plan things as best he can.
Donald Eastlake reviewed some details of the 12-14 September 2007 Lihue, Hawaii, TGv ad hoc meeting. The fact that there is some possibility of a co-located TGv ad hoc was mentioned. Donald was asked how many people registered at the Early Bird Rate; answer: five. The question was raised as to whether the “Early Bird Rate”, which has expired, might be extended for TGv registrants, since TGs registrants had more notice. Donald said he would provide a definitive answer to this question during the week of the San Francisco meeting, i.e., next week.
The Chair adjourned the call at 11:30 EDT.
Participants
- Donald E. Eastlake 3rd– Motorola
- Steve Conner – Intel
- Michael Souryal – NIST
- Michelle Gong – Cisco
- Kazuyuki Sakoda – Sony
- Malik Audeh – Tropos
- Hideyuki Suzuki – Sony
- Guenael Strutt – Motorola
- Kyeong Soo (Joseph) Kim – STMicroelectronics
- Michael Bahr – Siemens
- Juan Carlos Zuniga – Interdigital
- Kevin Hayes – Atheros
Submissionpage 1Donald Eastlake 3rd, Motorola