April 2009 doc.: IEEE 802.19-09/xxxxr0 May 2014 IEEE 802.11 Regulatory SC DSRC Coexistence Tiger Team Summary of activities since March F2F Date: 2014-05-15 Authors: Jim Lansford, CSR Technology Rich Kennedy, Research In Motion

April 2009 doc.: IEEE 802.19-09/xxxxr0 May 2014 Abstract Summary of activities in the IEEE 802.11 (Regulatory Standing Committee) DSRC Coexistence Tiger Team since the March F2F in Beijing. Jim Lansford, CSR Technology Rich Kennedy, Research In Motion

May 2014 Background FCC allocated 75MHz of spectrum in the 5.9GHz band (5850-5925MHz) for Dedicated Short Range Communications (DSRC) in October 1999  In FCC NPRM 13-22 (13-49), the FCC requested comments on a potential sharing of the DSRC band, to understand if a feasible sharing solution that protects DSRC users could be developed. DSRC would remain as a primary user of the band The new band would be designated U-NII-4 802.11ac could be modified to operate in this new UNII-4 band if approved by the FCC FCC did not specify the framework or etiquette by which band sharing would occur Jim Lansford, CSR Technology

Work to date Objectives of the group Possible work items Final report May 2014 Work to date Objectives of the group    Create a document that describes and quantifies possible coexistence mechanisms between DSRC and extensions of the 802.11 base standard in the proposed UNII-4 band, if the FCC allows such band sharing in a future R&O. Possible work items    > Review of ITS/DSRC field trials    > Review of work to date on coexistence > Presentations on use cases > Presentation of possible coexistence approaches    > Modeling/simulation of possible coexistence approaches    > Testing, field trials, and presentation of results from proposed prototype approaches Final report > Includes outputs from all work items > One or more “snapshots” (summary of work to date) will be provided to FCC * First snapshot in mid-January Jim Lansford, CSR Technology

Activities since March F2F May 2014 Activities since March F2F Presentation on CCA: 25 April 2014 Agenda: https://mentor.ieee.org/802.11/dcn/14/11-14-0538-00-0reg-agenda-for-dsrc-coexistence-tiger-team-call-25-april-2014.ppt Presentation: https://mentor.ieee.org/802.11/dcn/14/11-14-0532-00-0reg-cca-issues-for-dsrc-coexistence.ppt Minutes: https://mentor.ieee.org/802.11/dcn/14/11-14-0548-00-0reg-meeting-minutes-from-25-april-2014-dsrc-coex-call.doc Presentation on DSRC and spectrum sharing in Europe Agenda: https://mentor.ieee.org/802.11/dcn/14/11-14-0547-00-0reg-agenda-for-dsrc-coexistence-tiger-team-call-2-may-2014.ppt Presentation: https://mentor.ieee.org/802.11/dcn/14/11-14-0550-00-0reg-world-spectrum-sharing.ppt Minutes: Not posted yet Jim Lansford, CSR Technology

Highlights from CCA discussion May 2014 Highlights from CCA discussion Add new 10MHz CCA to 802.11ac Use Carrier Sense of 802.11p preamble, NOT energy detect No Changes to DSRC Similar to 802.11a protection, but 10MHz CCA Some changes to 802.11ac New CCA for 10MHz BW – not in existing spec DSRC Channels 172 and 178 sensed with CCA – other channels TBD CCA for 10MHz BW exactly the same as 802.11a detection at ½ clock rate 13/994r0 suggests a “NAV” during and for 10 seconds after the last PHY-CCA.indication(BUSY,(DSRC10_CCA)) Other details: CCA level, SIFS, slot times, etc. need to be worked out 802.11p PPDU Jim Lansford, CSR Technology

Future Work Anticipated presentations between now and San Diego May 2014 Future Work Anticipated presentations between now and San Diego Additional presentations on existing proposal(s) Channel models Additional coexistence proposals Some initial simulation results expected in the summer Invitation for future presentations: How CCA works DSRC field trials Use cases Proximity of public access points to heavily traveled highways Jim Lansford, CSR Technology

References DSRC Summary May 2014 FCC NPRM 13-22 (changes to 5GHz band rules, including proposed UNII-4 band): http://transition.fcc.gov/Daily_Releases/Daily_Business/2013/db0220/FCC-13-22A1.pdf FCC 13-22 Comments https://mentor.ieee.org/802.11/dcn/13/11-13-0444-01-0reg-fcc-13-49-comment.docx FCC 13-22 Reply Comment framework document https://mentor.ieee.org/802.11/dcn/13/11-13-0661-00-0reg-fcc-13-49-reply-comment-framework.doc FCC 13-22 Comments survey https://mentor.ieee.org/802.11/dcn/13/11-13-0679-00-0reg-fcc-13-49-comment-survey.docx FCC 13-22 Reply Comments https://mentor.ieee.org/802.18/dcn/13/18-13-0087-04-0000-draft-reply-comments-of-ieee-802-re-5-ghz-nprm-fcc-et-13-49.docx Letter to FCC OET from IEEE 802 regarding DSRC Coexistence Tiger Team activities https://mentor.ieee.org/802.18/dcn/14/18-14-0007-02-0000-dsrc-coexistence-tt-status-letter-to-oet.docx   DSRC Summary http://secs.oakland.edu/~gpcorser/vanet-kenny-DSRC.pdf Jim Lansford, CSR Technology

May 2014 References (2/2) IEEE 802.11 submissions on DSRC (since 802.11p was ratified) https://mentor.ieee.org/802.11/dcn/13/11-13-0552-00-0wng-802-11p-dsrc-and-802-11ac-coexistence.ppt https://mentor.ieee.org/802.11/dcn/13/11-13-0541-01-0wng-dsrc-applications-tutorial.pptx https://mentor.ieee.org/802.11/dcn/13/11-13-0543-01-0wng-dsrc-support-information.pptx https://mentor.ieee.org/802.11/dcn/13/11-13-0994-00-0reg-proposal-for-u-nii-4-devices.docx https://mentor.ieee.org/802.11/dcn/13/11-13-1276-00-0reg-proposal-for-sharing-in-unii-4-band.pptx https://mentor.ieee.org/802.11/dcn/13/11-13-1309-00-0reg-harmful-interference-to-dsrc-systems.pptx https://mentor.ieee.org/802.11/dcn/13/11-13-1360-00-0reg-dsrc-per-versus-rss-profiles.pptx https://mentor.ieee.org/802.11/dcn/13/11-13-1449-02-0reg-proposal-for-dsrc-band-coexistence.pptx https://mentor.ieee.org/802.11/dcn/14/11-14-0225-00-0reg-use-cases-for-dsrc-coexistence.ppt https://mentor.ieee.org/802.11/dcn/14/11-14-0259-00-0reg-v2v-radio-channel-models.ppt https://mentor.ieee.org/802.11/dcn/14/11-14-0532-00-0reg-cca-issues-for-dsrc-coexistence.ppt Jim Lansford, CSR Technology