May 2006
March 2006
Denver, CO - The TAG chair and vice chair were reelected unanimously by the TAG and subsequently approved unanimously by the 802 Executive Committee. The study group received two comments on the PAR for a “Recommended Practice on Methods of Assessing Coexistence of Wireless Networks.” The study group responded to those comments and also made a small revision to the PAR. The revised PAR was approved by both the study group and TAG. The resulting PAR was approved by the 802 Executive Committee at the closing meeting. The PAR is on the March NesCom agenda. The TAG began developing a press release to announce the new project. Once the press release is ready the chair will hold an electronic ballot of the executive committee on the press release. Also, the TAG reviewed the call-for-submissions. Both the press release and the call-for-proposals will be distributed after approval of the PAR from NesCom. The TAG held a two-hour joint meeting with P1900. Members of the two organizations discussed their ongoing activities. P1900.2 is developing a draft and the members of the 802.19 TAG agreed to give P1900.2 feedback on their document. There was a presentation on the draft coexistence assurance (CA) document on 802.11n. The TAG will be voting on that document once the 802.11n working group letter ballot begins. A concern was raised regarding 40 MHz operation in 802.11n and how well that would coexist with Bluetooth using adaptive frequency hopping (AFH). The TAG appointed a liaison to the Bluetooth SIG to enable discussion between the two organizations on this issue. There TAG reviewed its comments on the 802.15.4a CA document with members of that task group.
January 2006
Waikoloa Village, HI - The study group reviewed and revised the PAR and Five Criteria for “Methods of Assessing Coexistence of Wireless Networks.” The PAR and Five Criteria were unanimously approved by the study group. After the session a TAG letter ballot was initiated on the PAR and Five Criteria. Once approved by the TAG the PAR and Five Criteria will be submitted to the executive committee for approval at the March Plenary. The PAR will also be submitted to NesCom for approval at the March Standards Board meeting. There was a discussion on a document Recommended Coexistence Parameters. Volunteers were sought to assist with sections of this document. There was a discussion on the rules for voting on a CA document. After the session the chair will issue a letter ballot on changes discussed at the session. There was a presentation on “multiple access and the effects of aggregation.” There was a presentation on “coexistence issues with 802.11 VoIP in the presence of 802.15.1.” There was a joint meeting with 802.15.4a to discuss coexistence issues.
November 2005
Vancouver,
BC, Canada - The TAG received a liaison report
from P1901 Broadband over Powerline (BPL). The liaison was established
due to concern regarding potential interference caused by BPL that
could impact 802 wireless standards. The conclusion of the liaison
report is the P1901 working group does not expect any appreciable
interference caused by BPL. The TAG chair has forwarded the liaison
report to the 802 wireless working group chairs so if any members of
their working group have any concerns about BPL interference they can
raise the issue at a future TAG meeting. The TAG also heard a liaison
report from P1900.2 which is doing work on interference analysis. There
was a presentation on using IEEE 802.11k radio resource measurements to
facilitate coexistence. Members of 802.16h gave an overview of the
protocol being developed in that task group to facilitate coexistence
of 802.16 networks deployed near one another. A presentation was given
updating and extending a previous presentation on estimating packet
error rate caused by interference. There was a presentation on curve
fitting to simulated BER curves. The TAG reviewed the preliminary
802.15.4b coexistence assurance (CA) document with one of the members
of the 802.15.4b task group. The CA document will be sent out as a
companion document during the 820.15.4b sponsor ballot. The TAG
reviewed a preliminary document on coexistence parameters and test
cases and also started to review comments on the CA methodology
document. The TAG approved formation of a study group on Prediction of
Coexistence of Wireless Networks. The study group was subsequently
approved by the executive committee. Study group conference calls have
been scheduled beginning in December. The study group will develop a
PAR and Five Criteria and submit those documents to the executive
committee in February so that they can be voted on at the March plenary.
September 2005
Garden Grove,
CA - The TAG held a joint meeting with the
802.15.4a task group. There were two preliminary coexistence assurance
presentations. One presentation on the UWB PHY and one presentation on
the chirp spread spectrum PHY. The members of the TAG gave feedback to
the presenters on their preliminary analysis. There was a
liaison report from IEEE Project 1900.2 giving an overview of that
project, which is focused on Interference analysis techniques. The
scope of this project is broader than that of the TAG since it is
intended for any wireless system while the TAG is focused on 802
wireless systems. However, there is some potential for sharing of
material. The TAG chair also submitted a presentation to P1900.2 giving
an overview of the TAG. The plan going forward is to exchange liaison
reports on a regular basis. There was a presentation by one
of the chairs of 802.15.3a on "Detect and Avoid in MB-OFDM". This
presentation discussed the feasibility of detection of 802.16 signals
within the bandwidth of the MB-OFDM signal and then notching out a
subset of tones in the OFDM signal to suppress the MB-OFDM signal at
and around the 802.16 signal. There was a presentation on
"Estimating packet error rates caused by interference using analytic
techniques." This presentation demonstrated how to use probabilistic
analysis to estimate packet error rate (PER) caused by interference.
This presentation is a submission to be incorporated in the 802.19
coexistence assurance methodology document. Finally, the TAG
reviewed comments on the 802.19 TAG policies and procedures
(P&P) by the 802 vice chair in charge of policies and
procedures. The TAG reviewed each comment and agreed on what changes,
if any were needed in the P&P. After the IEEE session the TAG
chair will run an electronic ballot to approve the changes agreed upon
during the session.
July 2005
San
Francisco, CA - The TAG completed the
recirculation of the letter ballot on the 802.19 Policies and
Procedures (P&P). A procedure was added to the
P&P describing how the TAG will vote on a coexistence assurance
(CA) document accompanying a wireless working group letter
ballot. The TAG chair met with the 802 vice chair to review
the new P&P and the 802 vice chair identified a few areas where
the P&P needs improvement. Hence, the TAG chair will
run another letter ballot after the IEEE meeting to address those
issues. The TAG discussed whether we should set up a liaison
with IEEE 1900.2. The TAG decided it would be a good idea and
directed the TAG chair to send an email to the 1900.2 chair to
investigate establishing a liaison between the two groups.
The TAG chair sent an email and received a response. The two
chairs will discuss the idea later this week. The TAG
developed a presentation with a series of question to the 802.11
contention-based protocol (CBP) study group. The questions
were intended to gain a better understanding of the scope of the PAR
and to identify whether 802 is likely to have one or multiple standards
operating in the 3650-3700 MHz band. The TAG chair presented
the material at the CBP study group and the presentation was updated
with summary responses to the questions. Document
802.19-05/0023r2 captures that Q&A. The TAG chair and
the 802.11 and 802.15 liaisons met to discuss what current 802 projects
require a coexistence assurance document. A list of those
projects was sent to the 802 executive committee and the 802.19
voters. The 802 chair has subsequently asked the chairs of
the respective working groups to confirm that the projects on the list
do indeed require a CA document. The TAG invited several
experts to present a summary of the coexistence related aspects of
several standards/specifications operating in the unlicensed
bands. Presentations were given on IEEE 802.15.1
(802.19-05/0018r0), IEEE 802.16 (802.19-05/0025r0) and cordless
telephones (802.19-05/0026r0). The purpose of this activity
is to collect information about coexistence related aspects of all the
802 unlicensed wireless standards to assist the working groups in
developing coexistence assurance documents. The TAG chair and
the vice chair met with a subset of the 802.15.4b task group to advise
the task group on how to develop a CA document for 802.15.4b.
We discussed the technical details of 802.15.4b and how to best develop
a CA document for 802.15.4b.