November 2011
Atlanta, GA - The WG reviewed
PARs under consideration and provided comments to the
various WGs. Task Group 2 completed its second Task
Group review prior to the session and during the session
the task group worked on comment resolution. The
task group will be holding conference calls until the next
session in January. The plan is to complete the task
group review comment resolution at the January session and
initiate WG letter ballot after the January session.
July 2011
March 2011
Singapore - The working group reviewed the PAR for P1900.7. Members of several other working groups (802.11, 802.15, 802.16 and 802.22) also participated in the review of the PAR. We developed comments on the PAR and those comments were sent to the author of the PAR and the NesCom chair. The working group also reviewed the PAR for 802.15.8, prepared comments on the PAR and provided those comments to the EC reflector. The working group decided to defer election of the Technical Editor. In Task Group 1, there were a number of presentations and discussions on technical issues. There is an ongoing discussion between the proposal groups working on a merged proposal.
July 2010
San Diego, Ca – We gave a tutorial on “Coexistence in the TV white space” on Monday night. The tutorial included presentations from members of 802.19, 802.11 and 802.22. We held a short joint meeting with 802.11af and 802.22 to discuss questions from the tutorial. Task Group 1 heard 10 technical presentations during the week on: geolocation for cognitive access, data representation, GERDCS, concepts of operation, reference model, expectations of 802.19.1 from a primary protection point of view, channel set transitions, coexistence decision making topologies, channel selection support, and security. In September Task Group 1 will begin hearing proposals on the draft. After the meeting 802.19 hosted a free workshop on TV white space coexistence which was attended by over 100 people. Attendance included many people who do not normally attend 802 meetings.
May 2010
Beijing, China – Task Group 1 reviewed the call for proposals, the system design document, the process document and the time line that were all approved at the March session. It was suggested that 802.19 host a workshop on TV white space coexistence. The group agreed and started to look into our options. It was also suggested that we give a tutorial at the July Plenary session, and there was agreement in the group. We held a joint meeting with 802.11af and 802.22 where we gave an overview of the SDD. Task Group 1 spend time preparing material for the July tutorial. The task group heard presentations on coexistence mechanisms, coexistence of multiple secondary networks, channel classification, and possible reconfiguration parameters.
March 2010
Orlando, FL - The working group re-elected the WG chair, vice chair and secretary. The WG elected a chair and vice chair for Task Group 1. The task group approved a process document (802.19-10/29r3) for development of a draft that is ready to be sent to the working group. The task group approved a system design document (802.19-10/55r1), which includes terminology, requirements, system architecture and a preliminary outline of the draft. The task group approved a call for proposals (802.19-10/57r0) which was sent to the WG. The WG approved sending out the call for proposals. The task group also developed a target time line (802.19-10/56r2). The WG discussed holding a workshop in conjunction with the July plenary session. The WG approved investigation of holding such a workshop. A set of conference calls were scheduled up to the May session.
January 2010
Los Angeles, CA - IEEE 802.11 held its first session as a working group (WG) after approval of the 802 executive committee in November 2009 and approval of the 802.19.1 PAR by the IEEE standards board in December 2009. There was a joint meeting of 11/19/22 WGs on TVWS. Task Group 1 heard a number of presentations on process, requirements and architecture. The task group agreed to develop a system design document which will include sections on requirements, architecture, terminology, assumptions, and outline for the draft. The task group established ad hoc committees on: process, requirements, architecture and assumptions, terminology and evaluation criteria. A number of conference calls for three of the ad hoc committees (process, requirements, architecture and assumptions) during February and March. The task group goals for the March meeting is to elect task group officers and to agree on the system design document.
November 2009
Atlanta, GA - We reviewed and provided comments on both the 802.11 and 802.22.3 TVWS PARs. We developed responses to comments on the 802.19.1 TVWS Coexistence PAR. There was a presentation on the recent Ofcom consultation on TVWS database and a presentation on the new committee within the Software Defined Radio (SDR) Forum. The 802 executive committee approved the TVWS PAR for forwarding to NesCom and conversion of the TAG to a working group. We agreed to not hold any conference calls until after the new year. We will hold several calls after the new year, and before the January wireless interim session. In December NesCom and the Standards Board approved the 802.19.1 PAR.
September 2009
Waikoloa, HI - The TVWS Coexistence Study Group met for six two-hour sessions, to develop the PAR and 5C. The SG approved documents 802.19-09/78r3 (PAR) and 802.19-09/81r0 (5C). The TAG made some modifications to the PAR and then approved documents 802.19-09/78r4 (PAR) and 802.19-09/81r0 (5C). The SG agreed to schedule weekly conference calls but will only hold the calls if someone has a presentation to give. The PAR/5C will be provided to the Executive Committee at least 30 days before the November Plenary
July 2009
San Francisco, CA - The TV white space study group met and reviewed contributions on Use Cases and Coexistence Scenarios in the TV white space. The study group adopted a document on Use Cases and Coexistence Scenarios. There were a number of presentations on various coexistence mechanisms. The study group voted to request a study group extension to November 2009. The study group also generated a draft title, scope and purpose for a potential PAR. The executive committee approved the study group extension. The TAG decided to request that the EC withdraw the PAR for the Recommended Practice on methods of coexistence assessment, which was approved by the EC.
May 2009
Montreal, Canada - The TV white space study group met and reviewed contributions on Use Cases and Coexistence Scenarios in the TV white space. The study group also discussed other possible tasks. The study group agreed that it will prepare procedural recommendations to the executive committee and technical recommendations to the working groups on coexistence in the TV white space. The study group will hold weekly conference calls between the May Interim and the July Plenary.
March 2009
Vancouver, BC - The TAG reviewed comments on the 802.15.3c coexistence assurance (CA) document. The 802.15 WG revised the CA document based on the comments received. The TAG reviewed the final simulation results for 802.16h and 802.11y in the 3650 MHz frequency band. The TAG held a joint meeting with the 802.15.4g task group on smart utility networks and discussed first steps in addressing coexistence as the task group develops its standard. Finally, the TAG received an assignment from the executive committee study group (ECSG) on TV white space. The assignment was to continue development of coexistence scenarios and possible coexistence metrics for the TV white space. The TAG agreed to accept this assignment. Since the ECSG members wanted to be able to vote it was decided to form a study group within the TAG. The formation of the study group was approved by the executive committee. Since the TAG has a new study group the TAG will meet at the May Interim and possibly also at the September Interim, in addition to the regular meetings at the Plenary sessions.
November 2008
Dallas, TX - There was a presentation on testing results on the impact of the 40MHz version of 802.11n on 802.15.4. There was a presentation tutorial on the coexistence mechanisms in 802.11n. There was a presentation on a Robust Bluetooth detector using the 802.11n energy detector circuit, which was also presented directly to 802.11n. There was a presentation on a 40MHz scanning proposal for 802.11n and a presentation on listen-before-talk in 802.11. There was a presentation on simulation results for coexistence in the 3650 MHz band.
July 2008
Denver, CO - The TAG met with members of 820.11y and 802.16h to discuss coexistence in the 3650 MHz frequency band. There were presentations on coexistence metrics. There were several presentations on simulations results. There were two presentations on colocated coexistence. There were several presentations on coexistence of the 40MHz version of 802.11n and Bluetooth. There were several discussions on this topic.
March 2008
Orlando, FL - The TAG met with members of 820.11y and 802.16h to resolve comments on the simulation parameters document and the coexistence metrics document. Many of the comments were resolved. Any unresolved comments will be addressed in the biweekly conference calls. The TAG reviewed the initial draft based on previous TAG contributions and discussed what modifications were needed to prepare the draft for letter ballot.
November 2007
Atlanta, GA - The TAG met with members of 802.16h and 802.11y to discuss modeling of coexistence in the 3650 MHz frequency band. The TAG is developing a document summarizing all the simulation parameters. During the meeting a number of modifications to the simulation parameter document were agreed upon. The 802.16h task group plans to develop a coexistence assurance (CA) document giving the simulation results of 802.16h with 802.11y. There will be several sections showing the results with the various 802.16h coexistence mechanisms enabled. The TAG decided to not meet at Wireless Interim meetings going forward and to only meet at Plenary meetings and on conference calls. The TAG will be holding bi-weekly conference calls on coexistence in the 3650 MHz band.
July 2007
San Francisco, CA - The TAG reviewed and approved document 802.19-07/0007r2 as Draft version 0.1. Over the next few meetings that draft will be worked on until it is ready to go to letter ballot. The TAG has held conference calls since the March meeting on coexistence of 802.11y and 802.16h in the 3650 MHz frequency band. At the July meeting the TAG and members of 802.11y and 802.16h reviewed and approved a document summarizing the simulation parameters for simulating the coexistence of 802.11y and 802.16h. A presentation on the probability of hidden node and exposed nodes was given for those who were unable to attend the May meeting, since not all working groups meet together at the Interim sessions.
May 2007
Montreal, Canada - The TAG reviewed a contribution on text for the recommended practice. There was a presentation on a simulation hidden nodes and exposed nodes in 802.11y and 802.16h. There were discussions on coexistence of 40-MHz version of 802.11n in the 2.4 GHz frequency band with 802.15.1 and 802.15.4.
March 2007
Orlando, FL - The 802.16 working group requested a joint meeting of 802.11y, 802.16h and 802.19 to discuss coexistence simulations of 802.16h and 802.11y in the 3650 MHz frequency band. The meeting was held for only an hour due to limited time available to 802.11y. There were three presentations by members of 802.16h.The 802.16h draft has begun to added features to support coexistence with 802.11, the primary method being listen-before-talk (LBT). The 802.19 TAG will be hosting conference calls to review these documents further and to discuss modeling issues. The TAG reviewed a contribution with some initial text for the recommended practice.
January 2007
London, England - There was a presentation on SEAMCAT. An example was given of two 802.16 cells on adjacent channels. The tool is strong in modeling the geometry on a coexistence scenario in randomly placing stations in a cell, applying a path loss model and calculating the SNR. The tool currently does not model bursty transmissions and the PHY model was just a simple threshold model. The TAG discussed the set of coexistence scenarios to include in the draft.
November 2006
Dallas, TX - The TAG reviewed the most recent IEEE 802.11n coexistence assurance document, which had been updated based on feedback given to the authors by members of the TAG. There was a presentation on SEAMCAT which is a software tool being developed for sharing studies. So far, it seems the tool has been developed for evaluation of licensed wireless networks. A more detailed presentation may be given at the London meeting. The TAG discussed and revised an outline of the recommended practice. The TAG reviewed and updated two coexistence scenarios submissions. The TAG also reviewed a preliminary submission on DFS coexistence metrics and methods of evaluation.
September 2006
Melbourne, Australia - The 802.11n task group updated its coexistence assurance document just prior to the meeting but due to low attendance at the TAG meeting, given the location, the chair decided to push off review of the document until the November plenary meeting in Dallas. The TAG reviewed a coexistence scenario document on dynamic frequency selection (DFS). There was good support for the document which covers situations like 802.11n DFS in the 5 GHz band for avoiding radar and 802.22 DFS in the TV bands for avoiding TV broadcasts and wireless microphones. The document needs to be updated based on comments received and reviewed again at the November meeting.
July 2006
San Diego, CA - The 802.19 TAG reviewed two revised CA documents: the 802.11n CA document and the 802.15.4a CA document. The TAG voted to change its No vote on 802.15.4a to a Yes vote based on the revised 802.15.4a CA document. The TAG reviewed and approved the procedure document for developing the Recommended Practice on methods of assessing coexistence of wireless networks. The TAG reviewed four presentations on coexistence scenarios. There was a presentation from a member of 802.11 task group T on coexistence testing of 802.11 and Bluetooth™
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.