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Dear All, As you are probably aware at the United States (US) Federal Communications Committee (FCC) Open Commission Meeting on 12 December 2019, the commissioners unanimously approved the proposed Notice of Proposed Rule Making (NPRM). The comment
period on the NPRM will begin when the NPRM is published in the US Federal Register, which has not yet happened.
I have generated contribution summarizing the 5.9 NPRM status to aid in structuring the discussion during the upcoming TGbd Teleconference 17 December 2019 @ 9:00 AM EST. Note the contribution also provide multiple links where additional
information can be found. Regards, Joseph Levy (InterDigital) 802.11 TGbd Vice Chair From: Joseph Levy This e-mail is a call for discussion (as requested by the TGbd Chair) on the TGbd reflector (this e-mail stream) to reach a conclusion as to what, if any, actions/position should be taken by TGbd, in response to the announced FCC plans
for the 5.9 GHz band. As mentioned during the teleconference, I believe that the best way forward for TGbd is to generate a document (preferably a PowerPoint document) that provides 802.11 TGbd’s position/comments on the proposed FCC NPRM. I will create a draft
document based on this e-mail discussion, that will be discussed and hopefully approved by TGbd. Once TGbd has agreed, the document can then be shared with the 802.11 WG during one of the plenary time slots of the upcoming January 802.11 meeting and hopefully
the 802.11 WG will pass it along to 802.18 and the 802 EC. The rest of this e-mail provides information: the FCC documents and related web pages, a summary of the 802 process to send information to the FCC, and additional 802.11 and DSRC background information: FCC Information: As announced and discussed on the TGbd 3 December Telephone Conference: The United States (US) Federal Communications Committee (FCC) has announced that at their upcoming Open Commission Meeting on 12 December 2019 at 10:30 am - 12:30 pm EST (https://www.fcc.gov/news-events/events/2019/12/december-2019-open-commission-meeting)
they will consider a Notice of Proposed Rulemaking (NPRM) that would change the rules for the 5.9 GHz band (the DSRC band).
As stated on the FCC “FACT SHEET”:
What the NPRM Would Do:
• Propose to repurpose the lower 45 megahertz of the band (5.850.5.895 GHz) for unlicensed operations to support high-throughput broadband applications.
• Propose that unlicensed device operations in the 5.850-5.895 GHz band be subject to all of the general Part 15 operational principles in the Unlicensed National Information Infrastructure
(U-NII) rules. Propose to adopt technical and operational rules (e.g., power levels, out-of-band emissions limits) similar to those that already apply in the adjacent 5.725-5.850 GHz (U-NII-3) band.
• Propose to continue to dedicate spectrum in the upper 30 megahertz of the 5.9 GHz band (5.895-5.925 GHz) to support ITS needs for transportation and vehicle safety-related communications.
o Propose to revise the current ITS rules for the 5.9 GHz band to permit Cellular Vehicle to Everything (C-V2X) operations
in the upper 20 megahertz of the band (5.905-5.925 GHz).
o Seek comment on whether to retain the remaining 10 megahertz (5.895-5.905 GHz) for DSRC systems or whether this segment should
be dedicated for C-V2X.
o Propose to require C-V2X equipment to comply with the existing DSRC coordination rules for protection of the 5.9 GHz band Federal
Radiolocation Service.
o Propose to retain the existing technical and coordination rules that currently apply to DSRC, to the extent that we allow DSRC
operations in the 5.895-5.905 GHz band.
• Seek comment on how DSRC incumbents would transition their operations out of some or all of the 5.9 GHz band if the proposals are adopted.
The FCC typical process is (The specifics of this process will be provided in the published NPRM):
802 Process Information: The IEEE 802 process for submitting comments or reply-comments to the FCC requires the submission to be generated and approved by 802.18 and then approved by the 802 EC. 802.18 has already added the 5.9 GHz band NPRM discussion to its
agenda and has had a brief discussion on the possibility of submitting comments (see
18-19/0147r1 (slides 14 and 18) and
18-19/0151r0, note minutes for the telephone conference from 21 Nov are not currently available). 802.18 has regularly scheduled teleconference on Thursday 15:00-16:00 EST (see more
details » for teleconference details). 802.11 Background Information: The last area of information is related to past 802.11 discussion on the 5.9 GHz band: In 2013 the FCC release NPRM 13-22 (Docket 13-49) which requested comments regarding allowing unlicensed devices such as those using 802.11-based standards to share the 5.9 GHz band, which is currently allocated for DSRC and other services.
802.11 formed a DSRC Coexistence Tiger Team, to generate a 802.11 position:
802.11 DSRC Band Sharing Report This report was approved by 802.11 was sent to 802.18 to be forwarded to the EC for its approval and submittal to the FCC (item 28 in the 802.11 March 2015 minutes: 11-14/0287r0).
802.18 made some small modifications and forwarded the report to the 802 EC (18-15/0016r1 and cover letter
18-15/0018r1), (item 16 and 18 in the 802.19 March 2015 minutes:
18-15/0019r0). However, the 802 EC did not approve the motion: “Move to approve document 18-15/0016r1 providing a view of the work done in the IEEE802.11DSRC Tiger Team with the cover letter as contained in Document 18-15/0018r1 and submit it to the FCC.
The Chair of 802 is authorized to make editorial changes as necessary.” (Note the details of how this was not approved can only be understood from the EC minutes, the EC e-mail archive, I have not included all these details as it is quite complex.) The 802
EC eventually sent letter to Marlene H. Dortch, Secretary Federal Communications Commission in May (ec-15/0035r1)
that basically stated that 802.11 had some initial discussion regarding the feasibility and practicality of sharing the 5.9 GHz band and the documents of the discussion can be found on Mentor.
Other 802.11 documents of interest are: 11-15/0402r2 DSRC Band Sharing TT Status and Report Finalization, Rolf de Vegt
(Qualcomm) 11-13/1449r2 Proposal for DSRC band coexistence, Tevfik Yucek (Qualcomm) Regards, Joseph Levy (InterDigital) 802.11bd Vice Chair To unsubscribe from the STDS-802-11-TGBD list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBD&A=1 |