1. RR-TAG Liaison Report March 2009IEEE 802.18-802.11 Date: 2009-3-11 Authors: Rich Kennedy, OakTree Wireless

2. IEEE 802.18 Work Plan • Ofcom presentation on the Digital Dividend in the UK and Cognitive Radio • Presentation on license exempt operation in the Netherland Antilles • M.1450 approved by Excom • Meet with TGz chair to discuss 5 GHz operation of DLS • Met with 802.22 and 802.11 to finalize the Petition for Reconsideration; to be continued PM2

3. TVWS Petition for Reconsideration • FCC 08-260 R&O on the unlicensed use of the White Space; published 2/17, comments due by 3/18 • We have developed a petition for reconsideration to maximize the usability of this spectrum for Wi-Fi devices • IEEE 802.22 has a similar petition for their cause • Final petition must be from 802.18, so must be agreed to by both .11 and .22 • Some 802.11 members developed a response to the .22 petition – 11-09/239r2 • Would like to have full WG support in the negotiations

4. The Issues • In agreement • A- Fixed devices (base stations) should be allowed to have multiple fixed client/slave devices • B- Sensing for television signals should not be mandated by the Commission • C- Fixed Base Station Height Should Be Based on HAAT Rather than AGL and not limited to 30m AGL • The contention • D- PSD Limits and Minimum Occupied Bandwidth Should Be Specified; and RF Mask • Three sensing points

5. Situation • 802.18 hosted the Friday March 6th teleconference discussing 22-09/26r0 and 11-09/239r2 • 802.22 is evolving their position in response to 11-09/239r2 • See 22-09/26r1, which takes note of issues raised in 09/239r2 • 22-09/26 is evolving to become the 802.22 position

6. Sensing • 802.11 believes that sensing requirement for personal portable devices limit product feasibility; challenging to battery powered devices that utilize power saving mechanisms • “The sensing threshold for wireless microphones should be -107 dBm rather than -114 dBm” - requires significant battery power and time • “Part 74 devices need to be sensed within 2 seconds, not 60 seconds” – Wake up from sleep mode, etc, makes this difficult • “Synchronized quiet periods are necessary for incumbent sensing” – GPS clock undetectable indoors; others too unstable • We prefer database control of access to spectrum

7. Motion • IEEE 802.11 WG supports the comments of 11-09-0239-02-0wng-comments-on-802-22-input-to-08-260-petition-for-reconsideration as a formal input to the 802.18 RR-TAG in their development of a Petition for Reconsideration to the FCC TVWS R&O, FCC 08-260 • Moved: Rich Kennedy • Seconded: Peter Murray • Vote: • Yes 59 • No 0 • Abstain 12

8. The Results • At the mid-week plenary I asked the group to approve our input to the RR-TAG development of a petition for reconsideration to the FCC TVWS R&O • In the PM1 session the group approved their final petition: 18-09/039/r4 • Three major points of contention between 11 and 22 • 22 wanted synchronized quiet periods – rejected • 22 wanted 2 sec maximum detect time for microphones – rejected • 11 wanted to relieve personal portable devices of sensing requirement – rejected • 11 wanted to allow active connection with the database to manage contention - accepted

9. References • 18-09-0035-00-0000-ofcom-consultation-digital-dividend-cognitive-access • 18-09-0036-00-0000-ofcom-presentation-awarding-the-digital-dividend-in-the-uk-and-europe • 18-09-0037-00-0000-netherlands-letter-of-intent • 18-09-0034-01-0000-declaration-of-intention • 18-09-0020-04-0000-revision-of-recommendation-itu-r-m-1450 • 22-09-0026-04-0000-802-22-to-802-18-on-tvws-rando-doc • 11-09-0239-02-0wng-comments-on-802-22-input-to-08-260-petition-for-reconsideration • 18-09-0039-02-0000-petition-for-reconsideration-fcc-wsd-r-and-o-doc

10. Questions? Rich Kennedy, OakTree Wireless