1. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 1 Traceable OTA Performance Testing Presentation Notice: This document has been prepared to assist IEEE 802.11. 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 IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s 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 802.11. 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 Working Group 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 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at.http:// ieee802.org/guides/bylaws/sb-bylaws.pdfstuart.kerry@philips.compatcom@ieee.org Date: 2006-3-08 Authors:

2. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 2 Abstract This presentation summarizes the draft submission 802.11-06/0131r0 on Traceable OTA Performance Testing. The draft submission introduces the test environment and metrics necessary for traceable over-the-air performance testing of the wireless radios in 802.11 devices.

3. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 3 Overview Introduction to Proposal Traceable OTA Test Environment Traceable OTA Test Method Motion References

4. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 4 Introduction to Proposal The contents of this submission have been presented and reviewed over the past year and a half and include information from contributions: –IEEE 802.11-04/0674r1, “Passive Antenna Measurements vs. Over-The-Air Active Measurements and Associated Metrics for Wi-Fi Testing” –IEEE 802.11-05/0943r0, “Conducted Power and Sensitivity Measurements” –IEEE 802.11-05/0944r0, “OTA TRP and TIS Testing”

5. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 5 Traceable OTA Test Environment Introduction and Purpose Describes the test system required for performing traceable over-the-air RF performance tests on 802.11 DUTs. Specifies system components and associated measurement quality. Addresses combined radio and antenna related performance of single DUTs –in free-space –in free-space with near-field loading –with other impairments Introduces bulk performance metrics total radiated power (TRP) and total isotropic sensitivity (TIS) and related metrics. Traceable nature of measurements allows comparison of DUTs tested in different systems to within a known level of measurement uncertainty.

6. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 6 Traceable OTA Test Environment Configuration Defines test system consisting of: –Fully anechoic chamber for isolation and free-space environment –Multi-axis positioning system for spherical pattern measurement. –Dual polarized measurement antenna. –Traceable RF test equipment for measuring power and sensitivity of DUT (based on conducted test methods). –Near field phantoms for different physical use cases.

7. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 7 Traceable OTA Test Environment Configuration Defines environmental parameters/characteristics including: –Spherical coordinate system and polarization definitions. –Specifies far field conditions and range length issues. –Defines the quiet zone and references various site validation methodologies. –Provides methodology for range calibration. Note: This section is part of training documentation I’ve written in the past. Portions of this section were submitted to the CTIA and published verbatim as part of their OTA test plan, but rights to distribute original content were maintained. Can pursue official release from CTIA if needed. –Various other uncertainty contributions and points of concern.

8. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 8 Traceable OTA Test Environment Approach Defines basic physical configuration for free-space measurements of DUT. –Orientation with respect to positioner/coordinate system. –Orientation of moveable antenna elements. –Routing of cables, etc. –References conducted tests for other DUT parameters. Defines variants of test configuration including: –Use of near field phantoms (head, hands, tabletops, walls) –Alternate antenna orientations. –Alternate cable orientations. –Impairment with other radios active (converged devices) Defines variants of test conditions including angular step size and sensitivity search algorithm.

9. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 9 Traceable OTA Test Method Specification of Metrics Defines single point metrics: –Effective Isotropic Radiated Power (EIRP) –Effective Isotropic Sensitivity (EIS) Defines integrated (total) surface metrics: –Total Radiated Power (TRP) –Total Isotropic Sensitivity (TIS) Defines ratio metrics: –Directivity –Front to back ratio –Gain –Efficiency

10. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 10 Traceable OTA Test Method Procedure & Results Defines step by step procedure for measuring pattern data using conical cut method (north to south pole). Specifies recommended output information.

11. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 11 Need for these metrics There are over 70 OTA test labs installed worldwide. Many of these have customers or are owned by manufacturers who wish to perform TRP and TIS testing of 802.11 devices. To ensure the traceability of results between labs, it is not enough to use traceable test equipment; they must also follow equivalent test procedures. Standards already exist for other wireless technologies. This proposal mirrors those procedures for 802.11. Per the PAR, 802.11.2 was intended to provide this type of standardization for these labs. The methodology proposed here belongs in 802.11.2.

12. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 12 Motion Move to adopt the contents of document 11-06/0131r1 into the P802.11.2 draft. –Moved: –Second: –Yes/No/Abstain: Motion is technical (75% to pass)

13. Doc.: IEEE 802.11-06/0132r1 Submission March 2006 Dr. Michael D. Foegelle, ETS-LindgrenSlide 13 References 1. IEEE 802.11-06/0131r1, “Traceable OTA Performance Testing Proposal,” M.D. Foegelle.