|
IEEE 802.15 WPAN™ Task Group 4m (TG4m) TV White Space
Amendment to 802.15.4 |
Overview
The
IEEE 802.15 Task Group 4m (TG4m) is chartered to specify a physical layer for
802.15.4 and to enhance and add functionality to the existing standard
802.15.4-2011 MAC meeting TV white space regulatory requirements. The amendment
enables operation in the available TV white space, supporting typical data
rates in the 40 kbits per second to 2000 kbits per second range, to realize optimal and power
efficient device command and control applications.
Purpose of the Project
The purpose of this amendment is to allow 802.15.4 wireless networks to take
advantage of the TV white space spectrum for use in large scale device command
and control applications.
The IEEE802.15.4m PAR is found here.
Definition of TV white space
White space refers to underutilized portions of the radio frequency
(RF) spectrum. Large portions of the spectrum are currently unused, in
particular the frequencies allocated for analog television and those used as
guard bands to prevent interference between channels.
In the United States, frequency allocations in the RF spectrum are made by the
Federal Communications Commission (FCC). In November 2008, the FCC voted
unanimously to make unlicensed portions of the spectrum available for
use. At that time, at least three-quarters of the spectrum allocated for
analog television was unused. These frequencies become available after the
changeover to digital television was complete in February 2009. FCC issued the
third MO&O, FCC-12-36A1, with revised adjacent channel emission limits in
April. 2012.
In other regulatory domains including United Kingdom (Ofcom),
Europe (CEPT (ECC)), Canada (Industry Canada (CRTC)), and Singapore (IDA), new
regulations for white space are under establishment.
Current Status
The
SG-4TV was approved right before the January 2011 LA meeting. Since then, six
meetings were held from January to November in 2011. PAR and 5C was prepared
and submitted to EC in July, 2011.
The TG4m group was approved right before the September 2011 Okinawa meeting.
Thus the first TG4m meeting was held in Okinawa, Japan, in September, 2011.
A Technical Guidance Document (TGD) for
guidance for proposers was prepared. To
find the most updated TGD, you can click here.
Eight proposals
for baselines for standard drafting were submitted and presented in July 2012. These
proposals are:
15-12-0328-01
Proposed
Approach for MAC changes for TVWS by BCA
15-12-0332-03
ETRI
OFDM PHY Proposal for TG4m
15-12-0333-01
IEEE802.15.4m
MAC Proposal: TVWS Multi-Channel Utilization (TMCU) by ETRI
15-12-0334-02
ETRI FSK
PHY Proposal for TG4m
15-12-0335-01
MAC
proposal for supporting the TVBD network by ETRI
15-12-0336-02
Full
Proposal on PHY for IEEE 802.15.4m by NICT
15-12-0338-00
PHY
Proposal to TG4m by SSN
15-12-0340-01
PHY
Proposal for the IEEE 802.15.4m by Niigata University
In September 2012, four merged proposals were
presented and seven documents including these merged proposals in five areas
were adopted as the baseline documents as follows:
FSK PHY Merged
Proposal document:
15-12-0483-00-004m-tvws-fsk-merged-proposal-draft
OFDM PHY Merged
Proposal documents:
15-12-0480-01-004m-task-group-15-4m-ofdm-merged-text-proposal
15-12-0481-01-004m-ofdm-phy-merged-proposal-for-tg4m
Narrowband OFDM PHY
Merged Proposal document:
15-12-0511-01-004m-tvws-nb-ofdm-merged-proposal-to-tg4m
MAC Merged Proposal
documents:
15-12-0512-02-004m-tg4m-merged-mac-proposal
15-12-0513-00-004m-merged-mac-proposal-summary
Ranging Proposal
document:
15-12-0473-01-004m-suggested-baseline-for-optional-tg4m-ranging
A working group
letter ballot and two recirculation letter ballots were completed from February
2013 to May 2013. The first and second Working Group recirculation ballots to
submit the contents of d1P802-15-4m_Draft_Standard and
d2P802-15-4m_Draft_Standard to Sponsor Ballot, closed with the following
aggregate results with 92 and 25 comments received respectively:
|
Working Group Recirculation 1 (LB #88) |
Working Group Recirculation 2 (LB #90) |
|
|
Voters |
125 |
125 |
|
Voted |
101 |
102 |
|
Yes |
88 |
89 |
|
No |
10 |
10 |
|
Abstain |
3 |
3 |
|
% Voters |
80.8 |
80.6 |
|
% Yes |
89.8 |
89.9 |
|
% Abstain |
2.97 |
2.94 |
|
No. of comments |
92 |
25 |
The Sponsor Ballot and
the first recirculation ballot were closed on September 7, 2013 and October 24,
2013 respectively with the draft, d4P802-15-4m_Draft_Standard.The group
obtained conditional approval from the EC to submit the P802.15.4m draft
amendment to RevCom in November 2013.
|
Sponsor Ballot |
Sponsor Ballot Recirculation 1 |
|
|
Voted |
115 |
115 |
|
Yes |
103 |
109 |
|
No |
6 |
0 (4 No’s changed to Yes) |
|
Abstain |
6 |
6 |
|
% Yes |
94.5 |
100 |
|
% Abstain |
5.2 |
5.2 |
|
No. of comments |
388 |
166 |
A couple of recirculation
ballots are expected to fix minor errors before submitting the draft to RevCom in February 2014.
How to participate
·
Participate by registering,
attending, and presenting documents at IEEE 802.15 Meetings.
·
Access to the IEEE 802.15 Interest
Group, Study Group, Task Group and Working Group pages and documents is
available through the IEEE 802.15
Working Group home page.
·
IEEE 802.15.4m conducts discussions
and announcements of teleconferences and meetings via the IEEE 802.15.4m
mailing list. You can learn more about the 802.15 Mailing Lists by pointing
your browser here.
Information
·
802.15 documents are available on
the Document
Archive.
Sessions & Milestones
|
Status |
Year |
Month |
Venue |
Agenda |
Closing
Report |
Minutes |
|
SG |
2011 |
Jan |
LA |
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|
Mar |
Singapore |
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|
May
|
Palm
Springs |
|||||
|
Jul |
San
Francisco |
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|
|
2011 |
Sept |
Okinawa |
|||
|
Nov |
Atlanta |
|||||
|
|
Jan |
Jacksonville |
||||
|
Mar |
Waikoloa |
|||||
|
May |
Atlanta |
|||||
|
July |
San Diego |
|||||
|
Sep |
Palm Springs |
|||||
|
Nov |
San Antonio |
|||||
|
2013 |
Jan |
Vancouver |
||||
|
Mar |
Orlando |
|||||
|
May |
Waikoloa |
|||||
|
July |
Geneva |
|||||
|
Sept |
Nanjing |
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|
Nov |
Dallas |
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Who to contact with questions
· Chairman: Sangsung
Choi·
Vice
Chairman: Hiroshi Harada, Phil Beecher