1. doc.: IEEE 802.19-05/0018r0 Submission June 2005 Tom Siep, Cambridge Silicon Radio PlcSlide 1 802.15.1a Coexistence Characteristics Notice: This document has been prepared to assist IEEE 802.19. 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 grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEEs name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEEs sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.19. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the TAG of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.19 TAG. If you have questions, contact the IEEE Patent Committee Administrator at.http:// ieee802.org/guides/bylaws/sb-bylaws.pdfpatcom@ieee.org Date: 2005-06-20 Authors:

2. doc.: IEEE 802.19-05/0018r0 Submission June 2005 Tom Siep, Cambridge Silicon Radio PlcSlide 2 Abstract Summary of 802.15.1a characteristics to serve as a basis for coexistence analysis. This submission was originally presented to a coexistence assurance ad hoc committee of 802.11n and updated to include information discussed therein.

3. doc.: IEEE 802.19-05/0018r0 Submission June 2005 Tom Siep, Cambridge Silicon Radio PlcSlide 3 General Description of 802.15.1a Frequency Band –USA2.4-2.4853 GHz (FCC 47CFR15.247) –Europe2.4-2.4835 GHz (ETSI ETS 300-328) –Japan2.4-2.4835 GHz (ARIB STD-T66) Channels –79, 1 MHz –Non-overlap Spread spectrum type: –Frequency hopping –Pseudo-random hopping uses all 79 channels (exception: see Coexistence Characteristics)Coexistence Characteristics –1600 hops / sec normal operation –3200 hops / sec connection establishment Power -- device dependent –Class 1 = Max 100mW (20dBm), Min 1mW (0dBm) –Class 2 = Max 2.5mW (4dBm), Min 0.25mW (-6dBm) –Class 3 = Max 1mW (0 dBm), recommend <-30dBm Min

4. doc.: IEEE 802.19-05/0018r0 Submission June 2005 Tom Siep, Cambridge Silicon Radio PlcSlide 4 Modulation characteristics The Modulation is GFSK (Gaussian Frequency Shift Keying) with a bandwidth-bit period product BT=0.5. The Modulation index shall be between 0.28 and 0.35. A binary one shall be represented by a positive frequency deviation, and a binary zero shall be represented by a negative frequency deviation.

5. doc.: IEEE 802.19-05/0018r0 Submission June 2005 Tom Siep, Cambridge Silicon Radio PlcSlide 5 Topology TDMA Single Master with up to 7 slaves forming an independent piconet Piconets are able to interact

6. doc.: IEEE 802.19-05/0018r0 Submission June 2005 Tom Siep, Cambridge Silicon Radio PlcSlide 6 Coexistence Characteristics Out of Band Noise Floor tolerance Interfering Signal Frequency [Interfering Signal Power Level] 30 MHz – 2000 MHz [-10 dBm] 2000 – 2399 MHz [-27 dBm] 2484 – 3000 MHz [-27 dBm] 3000 MHz – 12.75 GHz [-10 dBm] Coexistence mechanism –Adaptive Frequency Hopping, which maps out error-prone channels –Number of channels may be reduced from 79 down to as low as 20 and are not required to be contiguous –Detection method not specified, but typical implementations: Do not do Listen Before Talk (LBT) Are reactive/heuristic – presence of others in band is based on repeated errors in specific channels

7. doc.: IEEE 802.19-05/0018r0 Submission June 2005 Tom Siep, Cambridge Silicon Radio PlcSlide 7 References IEEE 802.15.1-2005