Our January 2000 meeting was held at the David Inter-Continental Hotel,
Tel Aviv, Israel, organised by host BreezeCom Communications. BreezeCom
provided the 802.11 network this time. We had the benefit of an Internet
access thanks to the modem and Gateway brought by Tim Godfrey.
Summary report of the January 2000 meeting of
BreezeCom treated us to a nice evening tour through the old town of
Jaffa completed with a dinner entertained by a trio playing folk music
and a belly dancer. Our sub-chairs got a chance to follow a belly dance
lasson. Those staying the whole of Friday were treated also to a day tour
to Bethlehem and Jeruzalem. Members indicated they would be voting in favour
of having a plenary or interim in Israel.
To complete the work on draft standard 802.11d, some off line work is to
be prformed. The session has not been adjourned until a teleconference
to decide the result of that work. The important decision tele-conference
will be held on Wednesday, 16-FEB-2000. Conference Time:
10:00 AM Eastern
09:00 AM Central
08:00 AM Mountain
07:00 AM Pacific
If you want to participate, send an e-mail to the Chair (firstname.lastname@example.org)
so he can make sure there are sufficient ports. For the schedule, refer
to the TGd part.
Work in the 5 GHz band
"Task Group a" did not convene. IEEE Std 802.11a-1999, the baby of the
group, rolled off the press last week and will be sent to the individuals
that are mentioned in the standard.
The standard is based on Orthogonal Frequency Division Multiplexing
(OFDM) to modulate the data. The main benefit OFDM modulation is its robustness
to multipath echoes, which are typical to the indoor and mobile environments.
Each OFDM symbol is composed of 52 subcarriers, of which 48 carry data
and 4 subcarriers serve as phase reference pilots. The specifications of
the Physical Layer encompass data rates from 6 Mbit/s up to 54 Mbit/s,
with 20 MHz spacing between adjacent channels. All implementations are
required to support 6, 12 and 24 Mbit/s. Optional extensions are for 9,
18, 36, 48 and 54 Mbit/s. The range of data rates is provided to match
the wide range of radio channel characteristics in both indoor and outdoor
environments. The multirate mechanism of the MAC protocol ensures that
all devices communicate with each other at the best data rate in the present
Work in the 2.45 GHz band
"Task Group b" did not convene this meeting. IEEE Std 802.11b-1999 will
be sent to the printer around January 21, 2000.
The modulation used in the Standard is Complementary Code Keying (CCK).
CCK is the mandatory mode of operation for the Standard, it is derived
from the Direct Sequence Spread Spectrum (DSSS) technology. The multirate
mechanism of the Medium Access Control (MAC) warrants that the 11 Mbit/s
operation can switch back to 5.5 Mbit/s if the radio channel is below the
required value because of the distance between the stations or because
of interference. Stations that are even further away could switch back
to the 2 and 1 Mbit/s capablities of the DSSS modulation.
Work on the corrigendum of 802.11b's MIB
The Working Group Ballot
on draft D1.0 of 802.11b-cor passed unanimously with the following statisitics:
"Task Group b-cor" addressed all comments and produced a new draft, D1.1.
Carl Andren will translate the document into FrameMaker, and change the
revision level to D2.0. As soon as the Sponsor Ballot Group is in place.
we will start the Sponsor Ballot (after the March plenary meeting).
Approved without comments : 67 (plus 4 aspirant members)
Approved with comments : 0
Disapproved with comments : 0
Approval ratio = 100 % (required => 75 %)
NOTE: The designation of the project will be changed pending the decision
by NesCom. Because multiple corrigenda could exist, it is needed to distinguish
between the various projects. One member of NesCom is in favour of just
giving the next letter in the sequence of letters to corregenda, another
member opted for numbering the corrigenda per object. 802.11 asked the
chair to indicate that the result of the effort must be that 802.11b will
remain having the same name.
That assurance already came from the member opting for the next available
Work on update of Regulatory domains
The Working Group Ballot
on draft D1.0 of 802.11d passed with the following statisitics:
"Task Group d" reviewed the outcome
and managed to address the majority of the comments. Unfortunately, the
work could not be completed. The following schedule is made to progress
Approved without comments : 56
(plus 4 aspirant members)
Approved with comments
Disapproved with comments : 10
(plus one ex-member)
Approval ratio = 84 % (required
=> 75 %)
Task Group d is adding the necessary
changes to the standard to enable International Mobility of 802.11 devices.
Continue work for 2 weeks after the January Interim and make the revised
comment resolution document available on the 802.11 website by Jan 31,
Schedule teleconference call for Feb 7th, 2000 to informally discuss the
changes to the draft, and report a revised version of the draft by Feb
Schedule an approval teleconference meeting on Feb 15th, 2000
Start recirculation on Feb 16th, 2000, and close on Feb 27th, 2000.
Results available on March 16th, 2000.
work on Enhancements of 802.11
The group decided to start a study
group under the chairmanship of John Fakatselis to prepare a possible PAR
and 5 Criteria document for enhancements to the 802.11 standard. Elements
could include such functions as improvement of isochronous services, improved
privacy by longer keys and better authentication mechanisms, etc.
The group is looking for people
interested to do the work and calls for submissions on the topics of additional
markets served by better isochronous services, ischronous services on 802.11
using the PCF, new functionality required to support isochronous services,
stronger privacy requirements, and needs for stronger authentication.
The group reviewed concerns expressed in South Korea about the assignment
of the bands below 2400 MHz to Wireless Local LOOP (WLL), causing interference
from WLL into Radio LANs as well as concern about changing of the regulations
for Radio LANs to prevent interference into WLL. Enquiries taught that
there were no changes of the regulations involved, it was just mentioned
that regulations for Radio LANs were on a non-interfernece, non-protective