Recorded Attendees

February 2005 doc.: IEEE 802.11-05/0099r10

IEEE P802.11 Wireless LANs

Minutes for the Task Group T telecon

Date: 2005-02-03

Author(s): Name Company Address Phone email Areg 10335 Verville, Montreal CMC (514)907-1175 [email protected] Alimian Canada H3L 3E6

Abstract This document contains the meeting minutes from the TGT Task Group teleconference held on February 3, 2005.

Notice: This document has been prepared to assist IEEE 802.11. 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.

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TGT Minutes Feb 03 2005 page 1 A. Alimian, CMC February 2005 doc.: IEEE 802.11-05/0099r10

Recorded Attendees

Wright, Charles (Chair, TGT) Alimian, Areg Mlinarsky, Fanny Kobayashi, Mark Victor, Dalton Pirzada, Fahd Wiley, Stan Foegelle, Michael Lemberger, Uriel Mandeville, Bob Berry, Don Goel, Sachin Morrisey, Joe Shellhammer, Steve Tolpin, Sasha

Proceedings:

Chair opened the teleconference at 12:05 PM, EST. Areg Alimian was appointed recording secretary for the fist 30 minutes of the teleconference.

Chair started the telecon by reviewing the two main agenda items consisting of discussion around the questions by Joe Morrissey (1st ½ hour) followed by turning the line over to the Definitions ad hoc group for an additional hour. He mentioned that the objective of the first ½ hour is to get a sense from the group whether discussions on this topic should continue. He then asked if there is any discussion on the agenda. Seeing none, he asked if there is any objection to approving the agenda. No objections were heard and the agenda was approved.

Chair then asked if there is any objection for the approval of last tele conference minutes from the document # IEEE 802.11-05/0099r1; hearing no objections the minutes were approved.

Joe Morrissey heads a task group in IEEE Project 1073, Medical Device Communications, a joint project with ISOTC215. His TG intends to draft guidelines for the use of various wireless technologies for point- of-care medical data transport. He asks whether TGT will make some attempt to quantify the range of variablility that might be expected due to the wireless LAN operating environment.

Joe gave a brief introduction of the project and how 802.11 factors into their work.

Joe: We’re trying to integrate the 802.11 into the guidance document. Given a system, what might be the variability of performance given the variability of 802.11 environment.

Joe: We can simulate using different simulation models using OpNet or others. What’s we’d like to know would be to variability of real 802.11 environments. I had contacted Charles to see if there was inteterest in the group to have discussions.

Stan Wiley: Part of why I asked Charles to participate in the group is that we don’t have effective models that tell us the types of indoor transmissions environments that are characterixtic to hospitals. Healthcare is one of the most important beneficiaries or the wireless technology, and not improving the quality of transmissions would not help the proliferation of the wireless technology.

Fanny: Clarification: You’re looking at analysis of the environment with multipath interference, other traffic with concurrent interfering protocols. TGT Minutes Feb 03 2005 page 2 A. Alimian, CMC February 2005 doc.: IEEE 802.11-05/0099r10

Comment by Joe: I know that within Motorola, if you deploy external systems, they have a lot of formulas which are very complex and used for urban environments. What we’re looking for is relating variability metrics to these enrivonments.

Comment by Fanny: Some specific metrics we could consider the performance of throughpout as a function of multipath, and system performance as a function of signal level.

Question from Chair: Are we looking for characterization of the environment or characterization of the device performance in a given environment?

Answer from Joe: What we’re looking for is reasonable characterization of performance of these systems in a given environment.

Comment by MF: The real goal of TGT is characterizing the generalities such as throughput performance as a function of distance or signal level. This would not be done for each environment, but given the general guidelines, they can be applied to a specific environment.

Comment by Fanny: There have been a number of contributions for simple metrics in the TGT group thus far. This gives you part of the picture. There is another group, TGn, which’s defining the MIMO technology. They’ve also defined 6 models that characterize the range of different environments.

Comment by Chair: Those are models, not necessarily corner cases, sort of representing typical environments. Lacking any other models, people can take those models and use for comparison of performance to the extent that we’re characterizing how a device will work in a particular environment.

Chair then described some of the path loss models specified in 802.11 task group.

Question from Chair: Does the group think that we’re already doing what Joe is asking? Comment by Fanny: We’ve had a number of contributions, but we can add the channel emulation aspect.

Comment by Fanny: I can see something like this being included in our work. Comment by Fahd: Agreed.

Comment: Next time I’m in an emergency and my life is dependent on the quality of the wireless link, I’m going to do everything possible to characterize it beforehand.

Comment by Fanny: While it’s out of our scope to define prediction formulas, we still can enable those models and we can reference them in our document.

Comment by Chair: There are other people who are not on the call today, but their input would be valuable to drive what can be measured.

Comment by Joe: We want to at least communicate in our document a set of general communications with some analisys of what type of performance variations can be expected for a given metric.

There was a general consensus in the group that this topic is within the scope of TGT work.

Next Conference Call:

Thursday, February 10th , 2005, 12:00 PM, EST.

TGT Minutes Feb 03 2005 page 3 A. Alimian, CMC