Supporting Drop Eligibility in IEEE 802.11 MAC, Osama Aboul-Magd, 11-07/693R0

May 2007doc.: IEEE 802.11-07/0740r0

IEEE P802.11
Wireless LANs

Contents

Morning Session Tuesday 08:00 – 10:00

Supporting Drop Eligibility in IEEE 802.11 MAC, Osama Aboul-Magd, 11-07/693r0

Dynamic Point-to-Point OFDM Adaptation for IEEE 802.11a/g Systems, Marc Emmelmann, 11-07/0720r0.

Real-Time Deployment of a Reliable Multihop Network, Michael Souryal, Nader Moayeri, 11-07/297r0

Mechanism for Link Quality Measurement, Michael Souryal, Nader Moayeri, 11-07/650r0

Adjournment

Morning Session Tuesday 08:00 – 10:00

WNG SC (Wireless Next Generation Standing Committee) meeting called to order by Donald Eastlake at 08:04.

The IEEE 802 & IEEE 802.11 Policies and Rules were shown by Donald Eastlake, together with licensing terms and associated conditions. No comments or objections were noted.

The agenda was reviewed (11-07-0705r1). Approved by unanimous consent.

The March 2007 Orlando WNG SC minutes (11-07-0507-00-0wng-minutes.doc) were approved by unanimous consent.

Attendance approximately 50.

Supporting Drop Eligibility in IEEE 802.11 MAC, Osama Aboul-Magd, 11-07/693r0

Presented by Osama Aboul-Magd, Nortel Networks.

Question: What are you proposing?

Answer: Just for informational purposes now. Should be considered in maintenance group. Will take to 11mb.

Question: Pass through or drop packets that don’t meet prioritization.

Answer: QoS study group may look at this.

Question: VTS looking at this. Good candidate topic for that group.

Question: If 802.1 has decided how to handle, should we just follow?

Answer: Use the mechanisms as defined.

Dynamic Point-to-Point OFDM Adaptation for IEEE 802.11a/g Systems, Marc Emmelmann, 11-07/0720r1.

Presented by Marc Emmelmann, Technical University of Berlin.

Question: Why dynamic OFDM performance not as good when SNR is high?

Answer: Depends on channel estimation. If bad choice, not as good a possible. Choice is for highest possible data rate, not highest BER.

Question: For 0 SNR, what modulation would be chosen?

Answer: Some channels will have better results.

Question: Would expect peak SNR to be at least 15 to get 2 MB/s.

Question: Interleaver modifications?

Answer: Yes

Question: Simulations include all overhead?

Answer: Yes. Multiple runs to get average results.

Question: MAC efficiency with small size messages typically used for control.

Answer: Use different selection criteria. Reserved bits included to handle such cases.

Question:

Answer: Need to be able to estimate channel very close to time of transmission, not historical.

Question: Not commonly used because of need for additional estimation.

Answer: Right.

Straw Poll: Should further work be presented to 802.11 WNG including: additional simulation results of the just seen point-to-point and multi-user dynamic OFDM transmissions employing and extended 802.11a/g?

Yes-8, No-3, Many more people in the room that did not vote.

Real-Time Deployment of a Reliable Multihop Network, Michael Souryal, Nader Moayeri, 11-07/297r1

Presented by Michael Souryal, NIST. Second presentation on the agenda will be done at a later 11s session this week.

Question: What is advantage of breadcrumb vs a licensed band with sufficient power?

Answer: May be some situations where a single base station would not work. E.g., underground.

Question: Use ranging as well for location of people?

Answer: Absolutely. Work on-going at NIST on this.

Adjournment

Chair: Move for WNG to adjourn

No objections.

Meeting adjourned at 9:21.

Submissionpage 1John R. Barr, Motorola