Proposed Solution for Unassociated STAs in IEEE 802.11-17
In this document, Gaius Wee from Panasonic Corporation presents a short SSW format to support unassociated STAs during the CBAP. The proposal aims to enhance efficiency and facilitate discovery by modifying the Short SSW packet format for unassociated STAs. The document discusses the background, current format, and a detailed proposed solution for implementing the changes.
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June 2017 doc.: IEEE 802.11-17/0916r1 Short SSW Format For Unassociated STAs Date: 2017-06-28 Authors: Name Affiliations Address Phone Email Gaius Wee Panasonic Corporation Panasonic Corporation Panasonic Corporation Panasonic Corporation Panasonic Corporation Panasonic Corporation Panasonic Corporation 202 Bedok South Avenue 1 #02-11 Singapore 469332 +65 65505335 yaohuang.wee@sg.panasonic.com Hiroyuki Motozuka motozuka.hiroyuki@jp.panasonic.com Masataka Irie irie.masataka@jp.panasonic.com Takenori Sakamoto sakamoto.takenori@jp.panasonic.com Yutaka Murakami murakami.ytk@jp.panasonic.com Lei Huang lei.huang@sg.panasonic.com Kazu Takahashi takahashi.kazu@jp.panasonic.com Submission Slide 1 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 Abstract A Short SSW format to support usage by unassociated STAs during the CBAP is proposed Submission Slide 2 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 Background 11ay aims to support STAs with larger arrays Use of Short SSW packet instead of SSW frame allows 37% savings D0.35 [1] only supports use of Short SSW by associated STAs Short SSW packet format should be modified to support transmission by unassociated STAs to facilitate efficient discovery Submission Slide 3 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 Current format The format of Short SSW (I-TXSS) for SU addressing mode is: Source and destination addressing is based on AID Unassociated STAs do not have AIDs Unassociated STA may not know BSS AID of the AP/PCP Submission Slide 4 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 Proposed solution for CBAP (unassociated) Short SSW (I-TXSS) [STA] Unassociated field to identify transmission from unassociated STA Source AID and Destination AID fields contain 8-bit random values (0-255) to identify the STA Short SSW (R-TXSS) [AP/PCP] Source AID and Destination AID fields contain Source AID and Destination AID field values in received Short SSW SSW-Feedback [STA] RA contains BSSID TA contains STA MAC address CDOWN Select 1/2 [2]contains CDOWN of best received Short SSW SSW-ACK [AP/PCP] RA contains STA MAC address TA contains BSSID CDOWN Select 1/2 fields are ignored Submission Slide 5 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 Proposed Short SSW packet format Direction=0(I-TXSS), Addressing Mode=0(SU) Packet Type 2 Direction Addressing Mode 1 Source AID 8 Destination AID 8 CDOWN RF Chain ID Short Scrambled BSSID 10 Unassociated FCS Bits: 1 11 2 1 4 Submission Slide 6 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 Proposed solution for CBAP (comparison) Associated Unassociated AP/PCP STA AP/PCP STA Short SSW (DA=BSS AID, SA=STA AID) Short SSW (DA, SA=Random) DTI DTI Short SSW (DA=STA AID, SA=BSS AID) Short SSW (DA=Rcvd DA, SA=Rcvd SA) SSW-FB (RA=BSSID, TA=STA MAC Addr) SSW-FB (RA=BSSID, TA=STA MAC Addr) SSW-ACK (RA=STA MAC Addr, TA=BSSID) SSW-ACK (RA=STA MAC Addr, TA=BSSID) Submission Slide 7 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 Signaling of support 1 bit in the DMG Beacon s SSW field is used to indicate support of Short SSW reception from unassociated STAs during the CBAP B0 B1 B9 B10 B15 B16 B17 B18 B19 B21 B22 B23 PCP/AP Coverage Parameter RX DMG Antenna ID Direction CDOWN Sector ID Quasi-omni TX Unassociated Short SSW Reserved Bits: 1 9 6 2 1 3 1 1 Figure 46 SSW field format when transmitted in a DMG Beacon frame The RX Unassociated Short SSW field is set to 1 to indicate that the STA supports reception of Short SSW packets from unassociated STAs during the CBAP. Otherwise it is set to 0. Submission Slide 8 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 Conclusion Use of Short SSW should be extended to support use by unassociated STAs to reduce beamforming overhead during discovery Short SSW format and procedure for unassociated STAs for CBAP has been proposed DMG Beacon signals if unassociated Short SSW reception is supported Submission Slide 9 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 References [1] Draft P802.11ay_D0.35 [2] 11-17-0109-01-00ay-11ay-short-ssw-feedback-ack Submission Slide 10 Gaius Wee, Panasonic Corporation
June 2017 doc.: IEEE 802.11-17/0916r1 Straw poll Do you agree to include the changes described in 11-17-0938-02-00ay to enable Short SSW usage in CBAP by unassociated STAs? Submission Slide 11 Gaius Wee, Panasonic Corporation
