Doc.: IEEE 802.15-11-0471-00-004j Submission July 2011 Dave Evans, PhilipsSlide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks.

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doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 1 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Proposal in Response to Task Group j Call for Proposals] Date Submitted: [5 July 2011] Source: [Dave Evans, Liang Li] Companies [Philips, Vinno Technologies Inc.] Address [64-68 London Road, Redhill, UK] Voice:[ ], FAX: [Add FAX number], Re: TG4j Call for Proposals document number [If this is a response to a Call for Contributions, cite the name and date of the Call for Contributions to which this document responds, as well as the relevant item number in the Call for Contributions.] [Note: Contributions that are not responsive to this section of the template, and contributions which do not address the topic under which they are submitted, may be refused or consigned to the “General Contributions” area.] Abstract:Proposes that FCC MBANS rules can be met with minimal additional amendments for the 15.4 PHY and MAC layers. Purpose:For consideration by TG4j in response to the Call for Proposals ( ) as a proposal that meets all of the Technical Requirements. Notice:This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 2 Proposal in Response to Task Group j Call for Proposals

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 3 Content Objective of this Proposal TG4j Technical Requirements MAC Layer Physical Layer Conclusion

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 4 Objective of this Proposal The objective of this proposal is to create an j Amendment that requires minimal or no changes to the MAC and Physical layer specifications Only those parameters to enable operation in the MBANS frequency band and the associated FCC MBANS technical requirements need to be specified by j

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 5 TG4j Technical Requirements Compliance with: –FCC MBANS Rules Part 95 Subpart M – Medical Body Areas Network Service (device control) Amendments to technical requirements covering transmit frequencies, emissions, transmit powers etc –TG4j PAR and 5 Criteria Physical Layer –Compliant to the existing DSSS PHY employing O- QPSK, operating in the 2450 MHz band MAC Layer –Only additional MAC requirements to support the Physical Layer: To be defined

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 6 MAC Layer MBANS MAC/PHY should provide necessary features to support MBANS device control as required by FCC rules 15.4 already has the necessary MAC data and management service elements for MBANS device control

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 7 Physical Layer Channelization Plan – Requirements MBANS band is effectively two sub-bands –2360–2390 MHz, in-hospital deployment –2390–2400 MHz, in-hospital, out-of-hospital and home deployment –In some instances usage of the band may be confined to the upper 10 MHz only Need to defer to the primary users –AMT, 2360–2390 MHz –Amateur, 2390–2400 MHz –Their usage is indeterminate For example, AMT usage may change from time to time –Healthcare facilities may obtain information on authorized MBANS spectrum via the E-key mechanism

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 8 Physical Layer Channelization Plan – Requirements Existing chips constrain us to use channels centered on 1MHz steps –i.e MHz, not MHz Coexistence with –15.6 uses channels centered on 1 MHz steps (same as above) –Allows two 15.6 channels to exist between 15.4j channels

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 9 Physical Layer Channelization Plan – Requirements OOB emission limits –A channelization scheme using whole 1 MHz steps gives 0.5 MHz guard bands within the MBANS band –FCC MBANS rules already define 0.5 MHz guard bands outside of the MBANS band –Combination of these bands allows the dBm OOB emission limit to be achieved at 1 mW transmit power –Using 20 mW transmit power near the upper sub-band edge (2400 MHz) requires a reduced duty cycle Conclusion –Cannot fit eight 5 MHz channels into the band due to guard bands –A flexible channelization plan is needed to meet all of these requirements

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 10 Physical Layer Channelization Plan For in-hospital deployment –21 channels defined to promote coexistence with AMT –Non-overlapping channels will be used in MHz band For out-of-hospital deployment –Overlapping channels in 2390–2400 MHz band offers flexibility to avoid interference –Low deployment density and low duty cycle will assist MBANS coexistence AMT spectrumGuard bands 15.4j channelsAmateur radio spectrum MHz MHz 2360 MHz2390 MHz2400 MHz 0 (2363)1 (2368)2 (2373)3 (2378)4 (2383)5 (2388)6 (2393) 7 (2365)8 (2370)9 (2375)10 (2380)11 (2385)12 (2390)13 (2395) 14 (2367) 15 (2372) 16 (2377)17 (2382)18 (2387)19 (2392)20 (2397)

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 11 Physical Layer Channelization Plan Points to note: –An implementer may obtain information on best set of channels to use via the E-key mechanism –Consequently hub devices will mostly likely use a set of channels that are the best fit around the primary users Only non-overlapping channels will be used in MHz band –The chosen set of channels may apply to the whole of a medical facility and all hub devices will use these channels at any one time –15.4j has a total of 21 channels whereas 15.4 has 16 –15.4j orphaned node scan times may increase slightly compared to 15.4

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 12 Physical Layer Channelization Plan New channel page 9 for the MBANS band Channel numbering: –F c = k in MHz, for k = 0, 1, …, 6 –F c = (k – 7) in MHz, for k = 7, 8, …,13 –F c = (k – 14) in MHz, for k = 14, 15, …, 20

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 13 Physical Layer No additional MAC requirements are necessary to support the Physical Layer other than –Phy Information Base (PIB) attribute phyPagesSupported RF exposure compliance –Need to address this with respect to the SAR limits defined in 47 CFR § for portable devices –This is particularly applicable to the 20 mW transmit power limit in the 2390–2400 MHz band Low duty cycle of usage in this sub-band will assist compliance

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 14 Physical Layer 15.4 is already compliant with the allowed MBANS transmitter emission types and bandwidth Spurious Emissions –FCC § Unwanted Radiation limit is < 500 μV/m at 3m (equivalent to dBm) at 0.5 MHz outside MBANS band –Positioning the 1 st channel at 2363 MHz and the last at 2397 MHz allows 15.4j to use 1 mW transmit power whilst meeting this out of band spurious emission limit –Use of 20 mW requires a reduced duty cycle to meet the limit Adjacent and alternate channel rejection requirements –Same as the existing 15.4 requirements

doc.: IEEE j Submission July 2011 Dave Evans, PhilipsSlide 15 Conclusion A flexible channel plan is proposed to make the best use the MBANS band given the need to assist primary user coexistence and to meet the OOB emission limits This proposal meets the FCC MBANS Part 95 Rules and the amendments to the technical regulations The TG4j technical requirements can be met with minimal modifications to the existing MAC and PHY layers