1. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 1 802.11 TGn Beamforming and Adaptation Ad hoc - Calibration- 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: 2006-11-9 Authors:

2. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 2 Abstract I presented 06/1411r2 at Portland, to improve calibration related texts. Then, we update it and r3 was posted This document summarize proposed changes, and further discussion Referred document –TGn draft D1.05 –06/1411r2, and r3 (our proposal to modify calibration specification) –06/0541r11 (Solicited comment spreadsheet)

3. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 3 Re-cap of proposed changes in 1411r2 Clean-up informative text at 9.17.2.2.1 (introduction of calibration) Improved procedural description in 9.17.2.2.2 (procedure for calibration) –Add capability description –Modify Calibration Sequence to fix within existing rule –Add Calibration Sequence definition using NDP As a result of requested change above… –Modify rules of NDP to have one exception –Add “Channel Bandwidth” for “Reciprocity Correction” and “MIMO Reciprocal Channel Measurement” –Change definition of P CAL –Have a two separate subfields of “Calibration Complete” and “Channel Width” in MIMO Control field, instead of dual use. –Change the meaning of “Segment Sequence” to decremental manner, and describe this is also used for CSI FB and Non-Compressed Steering FB.

4. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 4 Differences from 06/1411 r2 to r3 [1] Completely remove “Reciprocity Correction” and “MIMO Reciprocal Channel Measurement” –As a result, Calibration Sequence also updated. This may bring procedural problem, explained later. Change MIMO Control field –Remove “Calibration Complete” and “Calibration Sequence” subfields “Calibration Sequence” subfield in HTC still exists. –Have a two separate subfields of “Coefficient Size” and “Codebook Information”, instead of dual use. This is not related calibration, but handling at once would make thing easier for the editor. –Remove “Explicit Channel Feedback” subfield, because it is not necessary anymore. –Rename “Segment Sequence” to “Remaining Matrix Segment” Meaning is the same as proposed in 1411r2. –As a result of them, I added many editorial changes. –Change the meaning of “Segment Sequence” to decremental manner, and describe this is also used for CSI FB and Non-Compressed Steering FB.

5. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 5 Differences from 06/1411 r2 to r3 [2] Add definition P CAL of for 1 stream. Change description regarding sounding dimension from –The number of long training field to obtain MIMO channel estimation sent in the sounding PPDU should be determined by N_{TX} at the STA transmitting the sounding frame. To –The number of long training fields used to obtain MIMO channel estimation that are sent in the sounding PPDU shall be determined by the number of transmit chains, N TX, used in sending these long training fields at the STA transmitting the sounding PPDU. The transmit chains used at the calibration initiator are those for which calibration is required. The calibration responder may train up to maximum available transmit chains to maximize the quality of the resulting calibration, though the number of spatial time stream for data symbols shall be determined by the rule described in 9.6.

6. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 6 Differences from 06/1411 r2 to r3 [3] Add description to explicitly indicate same antenna index shall be used during calibration receiving sounding and transmitting sounding; –The row order in the CSI feedback matrix transmitted from STA B shall correspond to the association of the rows of the spatial mapping matrix (21- 71) to its transmit antennas. For example, the receive antenna at STA B associated with the i-th row in the CSI feedback matrix in each subcarrier is the same as its transmit antenna associated with the i-th row in the spatial mapping matrix used for transmitting the sounding response with Calibration Position set to 2. Try to fix editorial bugs (in D1.05 and 1411r2)

7. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 7 Proposed Calibration Sequence [1]

8. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 8 Proposed Calibration Sequence [2]

9. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 9 Discussing items To resolve CID#7371, we proposed as follows. –TGn Editor: Change paragraph starting from line-52, page-143 (under 9.19.1) to the following; –Only the current TXOP holder or RD responder may transmit an NDP. A TxOP holder shall not set to 1 the NDP Announcement and RDG/More PPDU fields simultaneously, except for during calibration sounding exchange. An RD responder shall not set to 1 the NDP Announcement and set to 0 the RDG/More PPDU fields simultaneously. Removing CSD issue –The calibration responder shall not remove the spatial mapping from the CSI to be fed back to the initiator of the frame exchange. Before computing the correction matrices, the calibration initiator of this frame exchange shall itself be responsible for accounting for the spatial mapping in both its local channel estimate as well as in the quantized fed back to it.

10. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 10 Need your input [1] Now, MIMO Control field would be; –Many reserved bits at separated location. –Can we re-order these subfield, such as; B0 B1 B2 B3B4 B5 B6 B7B8 B9B10 B11B12 B13 B14 B15 1 octet4 octet Nc In de x Nr In de x Calibration Sequence Reserved Calibration Complete / Channel Width Explicit Channel Feedback Reserved Grouping (Ng) Coefficient Size / Codebook Information Reserved Codebook Information Res erve d MCMR Remaining Matrix Segment Sequence Sounding Timestamp B0 B1 B2 B3 B4B5 B6B10 B11B8 B9B10 B151 octet4 octet Nc In de x Nr In de x Channel Width Grouping (Ng) Coefficient Size Codebook Information ReservedRemaining Matrix Segment Sounding Timestamp ?

11. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 11 Need your input [2] “Remaining Matrix Segment” shown previous slide has 1 octets, but actually, it need only two bits. –Can we use “Reserved” bits instead of 1 octet ? –If we do so, which “reserved” bit ? After removing “MIMO Reciprocal Channel Measurement” and “Reciprocal Correction”, HT Action field value would become the left table. Can we re-order it as right table ? Action field ValueMeaning 0Notify Channel WIdth 1SM Power Save 2PSMP action frame 3Set PCO Phase 4Reserved 5 6MIMO CSI Matrices 7MIMO Non-compressed Steering 8MIMO Compressed Steering 9Ant. Selection Indices Feedback 10-255Reserved Action field ValueMeaning 0Notify Channel WIdth 1SM Power Save 2PSMP action frame 3Set PCO Phase 4MIMO CSI Matrices 5MIMO Non-compressed Steering 6MIMO Compressed Steering 7Ant. Selection Indices Feedback 8-255Reserved ?

12. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 12 Resolved Comments [1] 6797, 7278 : require better other frame sequence definition for calibration –Counter. Different frame exchange sequence is defined as shown in 06/1411r5. 7140, 660, 1235, 2257, 2258, 4222, 2680, 3967, 11893, 11905: require better expression, and/or to add missed specification –Counter. Clearer text is provided as shown in 06/1411r5 7661: Figure is too busy –Counter. Simplified figures are provided as shown in 06/1411r5. 661, 4637, 7906, 7919, 10075, 722: related to the definition of “Reciprocity Correction” –Counter. “Reciprocity Correction” is removed entirely as shown in 06/1411r5. 2269: Move procedural description to clause 9 –Counter. Conceptually accepted for calibration related subclause in general, but specified text in this comment is removed, because “Reciprocity Correction” is removed

13. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 13 Resolved Comments [2] 7371 : requires to allow NDP for all STAs –Counter. The rule for allowing NDP from responder during calibration is added as shown in 06/1411r5. –But it is only during calibration, 1236, 2268, 3810, 7820: require better expression, and/or to add missed specification –Counter. “Reciprocity Correction” is removed entirely as shown in 06/1411r5. 3973, 7129: requires the definition of MIMO Reciprocal Channel or clarification of number of stream or number of antennas –Counter. “Reciprocity Correction” is removed entirely as shown in 06/1411r5. 7823, 7826, 7830: require better expression of Explicit Channel Feedback –Counter. “This subfield is removed as shown in 1411r5.” Note: CID# 7823, 7826, 7830, 1236, 2268, 3810, 7820, 660, 1235, 2257, 2258, and 4222 are now assigned to Frame Format ad hoc.

14. doc.: IEEE 802.11-06/1651r1 Submission Nov 2006 Tomoya Yamaura (Sony)Slide 14 Resolved Comments [3] Comments listed here (related to Reciprocity Correction) are already resolved and their resolutions are APPROVED by TGn. –1237, 2263, 2266, 2267, 3811, 4223, 4224, 4225, 4749, 5648, 5650, 5651, 5652, 5653, 7249, 7599, 7821, 8774, 8778, 10169, 11393, 11394, 11395, 11397. Comments listed here (related to MIMO Reciprocal Channel Measurement) are already resolved and their resolutions are APPROVED by TGn. –2250, 2251, 2252, 2253, 2255, 2256, 2259, 2260, 2261, 2262, 2264, 3805, 3806, 3807, 3809, 4217, 4218, 4220, 4221, 7130, 7818, 7819, 10168. Comment 2277 (related to Table n30 in D1.0) is already resolved and their resolutions are APPROVED by TGn. Comment 2302 (related to Table n37 in D1.0) is already resolved and their resolutions are APPROVED by TGn. Comment 7829 (related to Table n44 in D1.0) is already resolved and their resolutions are APPROVED by TGn. However, 06/1411r3 proposed to remove subclauses related to these comments. –I guess we need another motion to replace approved resolutions, such as –Move to replace approved resolutions to comments listed below with “ Counter. Quoted subclauses are removed as shown in 1411r3. List of CIDs…. ”