May 2006
Jacksonville, FL - The 802.19 PAR was approved by NesCom and the Standards Board in late March. Since the March Session the TAG voted on two CA documents: one from 802.11n and one from 802.15.4a. At the May session the TAG reviewed the resolutions of those comments with members of those two task groups. The TAG reviewed and modified the procedure for development of the Recommended Practice document which will be put to a vote of the TAG at the July plenary session. The TAG also reviewed formatting instructions. There was a discussion on possible coexistence scenarios to be included in the Recommended Practice.
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.