1. doc.: IEEE 802.11-06/0644r2 Submission May 2006 Päivi Ruuska, NokiaSlide 1 Measurement Pilot Transmission Information as optional information in Probe Response and Neighbor Report 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: 2006-05-17 Authors:

2. doc.: IEEE 802.11-06/0644r2 Submission May 2006 Päivi Ruuska, NokiaSlide 2 Abstract This submission introduces: a Measurement Pilot Information to be added as optional element in the Probe Response A Measurement Pilot Information to be added as optional sub-element in the Neighbor Report Normative text is given in 06/0643r1.

3. doc.: IEEE 802.11-06/0644r2 Submission May 2006 Päivi Ruuska, NokiaSlide 3 Introduction Active Scan is used to detect APs. –STA uses the information in the Probe Response to select AP to associate or reassosiate to. –If the STA detects multiple APs, it may want to measure some of the APs by receiving more frames from them. Neighbor Report is used to speed up the STA’s handoff from one BSS to another. –STA uses the information included in the Neighbor Report to select the APs to which it may roam to. –Before performing handoff to a new AP, the STA may want to measure some of the reported APs by receiving more packets from them. Information about AP’s Measurement Pilot Transmissions would help STA to decide how to measure the AP efficiently and to align the measurement better with the user traffic.

4. doc.: IEEE 802.11-06/0644r2 Submission May 2006 Päivi Ruuska, NokiaSlide 4 Fast and efficient scanning From Neighbor Report or Probe Response the STA does not currently know whether the AP is transmitting Measurement Pilot Frames. STA may have VoIP link while it has to detect and scan new APs to roam to. STA may schedule the AP scannings better if knows whether the AP is transmitting Measurement Pilots frames. –APs not transmitting the Measurement Pilot frames shall be scanned by active scan or passive scan. –APs transmitting the Measurement Pilot frames with small Measurement Pilot Interval may be scanned any time e.g. between VoIP transmissions. If the STA estimates the TBTT of the AP from the Probe Response or Neighbor Report information, it may scan AP passively at TBTTs. However, if the AP is transmitting Measurement Pilot frames, the STA would be able to receive “passively” the same amount of scan data much faster and it does have to schedule the transmission at TBTTs only.

5. doc.: IEEE 802.11-06/0644r2 Submission May 2006 Päivi Ruuska, NokiaSlide 5 Overview of the normative text changes to include Measurement Pilot Transmission Information in Probe Response New Measurement Pilot Transmission Information element is introduced. The element may be included in the Probe Response. Measurement Pilot Transmission field is Measurement Pilot Interval as specified in 7.3.1.19, if the AP is transmitting Measurement Pilots. If the AP is not transmitting the Measurement Pilots, the Measurement Pilot Transmission field is set to zeroes. Element IDLengthMeasurement Pilot Transmission Octets: 1 1 2

6. doc.: IEEE 802.11-06/0644r2 Submission May 2006 Päivi Ruuska, NokiaSlide 6 Overview of the normative text changes to include Measurement Pilot Transmission Information in Neighbor Report New field added to Neighbor Report to carry Measurement Pilot Information. The Measurement Pilot Transmission Information field contains the Measurement Pilot Interval field as specified in 7.3.1.19. The Measurement Pilot Transmission field is set to zeroes if the reported AP is not transmitting the Measurement Pilots frames or the Measurement Pilot interval is not known by the reporting AP.

7. doc.: IEEE 802.11-06/0644r2 Submission May 2006 Päivi Ruuska, NokiaSlide 7 Motion Move to include the normative text in document 11-06- 0643-01-000k-pilot-tx-information-elements.doc into the TGk draft. Moved: Jari Jokela Seconded: Yes: No: Abstain: