RR-TAG Liaison Report July 2009 IEEE 802.18-802.11 Month Year doc.: IEEE 802.11-yy/xxxxr0 July 2009 RR-TAG Liaison Report July 2009 IEEE 802.18-802.11 Date: 2009-7-15 Authors: Rich Kennedy, Research In Motion John Doe, Some Company

IEEE 802.18 Activities Discussed of the EN 300 328 changes July 2009 IEEE 802.18 Activities Discussed of the EN 300 328 changes 802.11 Regulatory Ad Hoc wil work with 802.15 for input to ERM TG11 Reviewed five documents from 802.16 for submittal to the ITU-R WP-5D/5A Ofcom update on the Digital Dividend Discussion of WG SE21 work item on out of band emissions from weather radars Rich Kennedy, Research In Motion

July 2009 EN 300 328 v1.8.1 December 2007 ERM TG11 began a work item to write v1.8.1 of EN 300 328 Applications limited to 10mW TX power under EN 300 440 want to be able to operate at 100mW Radio control model vendors Industrial controls manufacturers 802.15.4g (Smart Utilities Networks) Wireless speaker systems Meetings were dominated by the non-RLAN entities Application-specific text was being added to the specification Over time the document was becoming a “telephone book” Decision was made to develop a “Medium Utilization” (MU) formula that would cover non-LBT applications Rich Kennedy, Research In Motion

July 2009 The Ground Rules Prior to the June meeting of TG11, a small group met to decide on an approach that would encompass all applications in one formula This needs to be a “victim oriented approach” It must be: maximally effective maximally generic maximally practical minimally restrictive “The role of the EN 300-328 can therefore only be to ensure that in case of congestion every compliant device does not take up an unreasonable fraction of the medium, therefore guaranteeing that any system making use of the same medium is not denied a fair fraction of it.” Rich Kennedy, Research In Motion

Initial Consideration July 2009 Initial Consideration Bandwidth, Area and Time are primary considerations Two systems interfere if their Bandwidth overlaps Bandwidth Two systems interfere if they transmit at the same Time Time Two systems can interfere if they are located in the same Area Area Rich Kennedy, Research In Motion

First Attempt at a Formula for MU July 2009 First Attempt at a Formula for MU BW/83.5 MHz is the fraction of the 2.4GHz band utilized Duty Cycle BW / 83.5 MHz Power/100mW represents the fraction of maximum power Power/100mW Duty Cycle represents the time a system is active MU= (BW/83.5MHz) DC  (P/100mW ); MU<[4%] Rich Kennedy, Research In Motion

Adjustments to the Formula July 2009 Adjustments to the Formula During the June meeting the adjustments to the formula were discussed Deployment Density should be included in the formula; NO Industrial and Process Controls with alarms should have priority; NO Manual blacklisting for frequency hoppers should be allowed; NO The measure of Power should be TRP instead of EIRP; NO Higher power for outdoor systems; sector – NO; pencil beam – YES Bandwidth to be used; 6dBc – NO; 20dBc – YES PSD is a better measure than Power; YES Max. TXON time and min. TXOFF time must be considered Bandwidth is not required; Power Density x Time is the best measure Rich Kennedy, Research In Motion

How Does This Affect 802.11? As an Interference Generator: July 2009 How Does This Affect 802.11? As an Interference Generator: Note: Systems compliant with WiFi [sic] specification [x] or with IEEE standard 802.11 [x] are considered compliant with this requirement. No further assessment or testing for clause 4.3.5 is required no changes required As an Interference Victim: Devices once limited to 10mW in this band will now be allowed to operate at 100mW Medium Utilization formula is intended to minimize interference Rich Kennedy, Research In Motion

July 2009 Future TG11 Meetings It was decided that this work item will not be completed on schedule; chair will request an extension Next meeting tentatively October 12 – 14, 2009 After that – December 10 – 11, 2009 (following ETSI BRAN December 7 – 9) Next meeting will focus on test methodology and coming to a final agreement on the formula and maximum percentage for MU Plan is to complete the work in March 2010 Rich Kennedy, Research In Motion

July 2009 Recommendations for 802.18 An EU regulator has indicated that the current TG11 draft v1.8.1 is flawed; we should help TG11 define this in a technology-neutral way IEEE 802.11 should work with 802.18 to develop an opinion on the formula and test methodology and submit it to ERM TG11#22 in October IEEE 802.11/18 members who are also ETSI members should attend the next two meeting to ensure that RLAN interests are properly represented (and voted) As this will become an ETSI regulation, we need to consider global impact, as many countries follow ETSI Rich Kennedy, Research In Motion

Proposal for Teleconference July 2009 Proposal for Teleconference Coordinate with 802.15 Inputs to EN 300 328 affect both technologies Must be submitted through 802.18 Thursday, August 6th, 2009 Thursday, August 27th, 2009 Rich Kennedy, Research In Motion

July 2009 References ERM_TG11(21)22 - Notes of the 21st meeting of TG11 (ETSI membership required) Rich Kennedy, Research In Motion