doc IEEE 802 11 -10 0742 r 0

doc. : IEEE 802. 11 -10/0742 r 0 July 2010 IEEE P 802. 11 af Tutorial Date: 2010 -07 -12 Authors: Submission Rich Kennedy, Research In Motion

doc. : IEEE 802. 11 -10/0742 r 0 July 2010 Outline • • • Introduction: White Spaces Explained Historical 802. 11 Regulatory Amendments History: P 802. 11 y P 802. 11 af TV Bands Regulatory Requirements P 802. 11 af PAR Scope and Purpose, Principles and Vision/Outcome Our Take on Sharing and Interference Mitigation Task Group Plan TGaf Timeline Submission Rich Kennedy, Research In Motion

July 2010 doc. : IEEE 802. 11 -10/0742 r 0 Introduction: White Spaces Explained • Explosion of wireless applications and devices creates multiple problems for regulators – Where do we find more usable spectrum now! to avoid congestion? – How do we guarantee compliance without adding enforcement resources to deal with interference? • More spectrum – There is no more (see next slide) • Rebanding or sharing are the only options – Rebanding is costly and disruptive – Sharing could introduce unwanted interference Submission Rich Kennedy, Research In Motion

July 2010 doc. : IEEE 802. 11 -10/0742 r 0 The US Spectrum Allocation Chart Submission Rich Kennedy, Research In Motion

doc. : IEEE 802. 11 -10/0742 r 0 July 2010 P 802. 11 af A Regulatory Driven Amendment • Policy Statement FCC 00 -401 & NPRM FCC 00 -402 (November 2000) – Recognize the need to share spectrum to support wireless applications – Examine how to remove regulatory barriers for efficient spectrum sharing – Enable development of methods for opening licensed bands for sharing • FCC ET Docket 02 -380: Additional Spectrum for Unlicensed Devices Below 900 MHz and in the 3 GHz Band – FCC 02 -328 Notice of Inquiry [December 2002] • FCC ET Docket 04 -186: Unlicensed Operation in the TV Broadcast Bands – FCC 04 -113 Notice of Proposed Rule Making [May 2004] – FCC 06 -156 First Report & Order and Further Notice of Proposed Rule Making [October 2006] – FCC 08 -260 Second Report & Order and Memorandum Opinion and Order [November 2008] • Received 16 Petitions for Reconsideration Submission Rich Kennedy, Research In Motion

doc. : IEEE 802. 11 -10/0742 r 0 July 2010 Historical 802. 11 Regulatory Amendments • General – 802. 11 a [FCC Part 15. 407; ETSI EN 301 893] – 802. 11 b/g [FCC Part 14. 247; ETSI EN 300 328] • 802. 11 h – DFS/TPC [ETSI EN 301 893] • 802. 11 j – Japan 5 GHz band [ARIB STD T-71] • 802. 11 y – US 3650 – 3700 MHz; contention-based protocol [FCC Part 90, Subpart y] Submission Rich Kennedy, Research In Motion

July 2010 doc. : IEEE 802. 11 -10/0742 r 0 History: P 802. 11 y • The FCC authorized sharing in the 3650 – 3700 MHz band based on the use of Contention Based Protocols – CBP (FCC 05 -56) • Task Group ‘y’ developed an enablement scheme that requires devices operating in an 11 y network to hear and decode an enabling beacon in order to transmit • The FCC adopted parts of the 11 y CBP for use in the sharing of the TV bands Submission Rich Kennedy, Research In Motion

July 2010 doc. : IEEE 802. 11 -10/0742 r 0 TV Bands Regulatory Requirements • These [FCC] rules are primarily intended to ensure the efficient sharing of the TV Bands while protecting incumbent users • The FCC has enabled this band for TVBDs if and only if the licensed users’ interests are protected – We must not interfere – Mitigation of any interference issue should not increase the enforcement requirements for the Commission • The National Broadband Plan looks to enable an additional 500 MHz of spectrum for wireless broadband – The US President has issued a memorandum directing the FCC to “buy back” 120 MHz of spectrum from the TV broadcasters – This could severely impact the available white spaces available for unlicensed use Submission Rich Kennedy, Research In Motion

July 2010 doc. : IEEE 802. 11 -10/0742 r 0 P 802. 11 af PAR Scope and Purpose • Approved PAR Scope: An amendment that defines modifications to both the 802. 11 physical layers (PHY) and the 802. 11 Medium Access Control Layer (MAC), to meet the legal requirements for channel access and coexistence in the TV White Space • Approved PAR Purpose: The purpose of this amendment is to allow 802. 11 wireless networks to be used in the TV white space Submission Rich Kennedy, Research In Motion

July 2010 doc. : IEEE 802. 11 -10/0742 r 0 Purpose, Principles and Vision/Outcome “If you don't know where you are going, you might wind up someplace else. ”* • • 11 -06 -0056 -00 -0000 -cbp-and-david-allens-methods http: //en. wikipedia. org/wiki/Getting_Things_Done Purpose: the Task Group should create an amendment whose implementation in solutions is likely to receive FCC approval for operation in the TV White Spaces under the 47 CFR Part 15 subpart H rules. Principles: – If the FCC changes the rules, the Task Group should change the amendment accordingly – The amendment should not duplicate functionality that is being standardized in other Task Groups that are likely to complete before 802. 11 af. – There is no need for backwards compatibility with 2. 45 GHz ISM operation. – The starting point is changes to Clauses 17 and 20 and Annexes I and J • Vision/Outcome: Use the OFDM PHYs with 5 -, 10 - and 20 -MHz channel widths to specify the basis for a system that the regulators can approve for operation in the TVWS bands. * Yogi Berra Submission Rich Kennedy, Research In Motion

doc. : IEEE 802. 11 -10/0742 r 0 July 2010 Our Take on Sharing and Interference Mitigation • Sensing will be a problem for Personal/Portable devices – Cognitive Radio techniques are still prohibitively expensive for low-cost, battery powered devices – Currently, power requirements for sensing incumbents are difficult (at 114 d. Bm; -126 d. Bm requested by US broadcasters and in EU plan) – There is no way for sensing to determine if wireless microphones are legal or illegal • A regulatory database will suffice – Can provide accurate, timely information regarding available channels • Enablement is the key to effective interference mitigation – Devices in a white space network cannot transmit without being enabled – Beacons contain location information for enabling STA, so incumbents interfered with can easily establish the source and react without regulatory intervention Submission Rich Kennedy, Research In Motion

July 2010 doc. : IEEE 802. 11 -10/0742 r 0 Task Group Plan • • Start with a base draft Conduct an internal review to understand the WG issues Advance the draft while awaiting final FCC rules Keep true to the PAR Scope – “… to meet the legal requirements for channel access and coexistence…” – PHY changes for throughput, aggregation, range enhancements are out of scope – Once P 802. 11 af completes and establishes a market in this spectrum, enhancements will drive additional amendments • Finish fast and begin to establish the market for TVWS networks – Enhancements should follow, not delay access to this spectrum Submission Rich Kennedy, Research In Motion

July 2010 doc. : IEEE 802. 11 -10/0742 r 0 TGaf Timeline • Initial Working Group Letter Ballot: September 2010 • Re-circulation Working Group Letter Ballot: November 2010 • Form Sponsor Ballot Pool: January 2011 • Initial Sponsor Ballot: March 2011 • Approved Sponsor Ballot: May 2011 • Final WG/EC Approval: November 2011 • Rev. Com/Standards Board Approval: December 2011 Submission Rich Kennedy, Research In Motion

doc. : IEEE 802. 11 -10/0742 r 0 July 2010 References • • • 11 -09 -0749 -03 -0000 -802. 11 -in-the-tvws IEEE Std 802. 11 -2007 IEEE Standard for Information Technology— Telecommunications and information exchange between systems— Local and metropolitan area networks— Specific requirements Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications FCC 08 -260 Second Report and Order and Memorandum and Order (http: //hraunfoss. fcc. gov/edocs_public/attachmatch/DA-01 -260 A 1. pdf) 11 -09 -0934 -09 -tvws-par-nescom-form-plus-5 c 11 -06 -0056 -00 -0000 -cbp-and-david-allens-methods http: //en. wikipedia. org/wiki/Getting_Things_Done Submission Rich Kennedy, Research In Motion