Multi-AP_Technical_Specification

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Used with the permission of Wi-Fi Alliance under the terms as stated in this document.

Multi-AP

Technical Specification

Version 171212

DRAFT

WI-FI ALLIANCE PROPRIETARY – SUBJECT TO CHANGE WITHOUT NOTICE

Use of this document is subject to all of the terms and conditions of the Specification Use Agreement. This

draft specification is based on the non-final version of the specification and is subject to revision and

change. Wi-Fi Alliance provides no assurances of any kind as to whether the information in this document

will represent or not represent the final specification. The information in this document is based upon an

unapproved draft specification and must not be utilized for any conformance or compliance purposes. Wi-

Fi Alliance has not conducted an intellectual property rights ("IPR") review of this document and the

information contained herein, and makes no representations or warranties regarding any IPR, including

without limitation patents, copyrights or trade secret rights. This document may contain inventions for which

you must obtain licenses from third parties before making, using or selling the inventions. All liability and

responsibility for any use of this draft specification rests with the user, and not with any of the parties who

contribute to, or who own or hold any IPR in or underlying, this draft specification.

This document may be used with the permission of Wi-Fi Alliance under the terms set forth herein.

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as an approved specification, this document is a work in process and is not an approved Wi-Fi Alliance

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Multi-AP Technical Specification v171212

Used with the permission of Wi-Fi Alliance under the terms as stated in this document.

Page 3 of 66

Table of contents

1 OVERVIEW................................................................................................................................................................... 9

1.1 Scope ............................................................................................................................................................ 9

1.2 Purpose ......................................................................................................................................................... 9

2 REFERENCES ........................................................................................................................................................... 10

3 DEFINITIONS AND ACRONYMS .............................................................................................................................. 11

3.1.1 Shall/should/may/might word usage .............................................................................................. 11

3.1.2 Conventions ................................................................................................................................... 11

3.1.3 Definitions ...................................................................................................................................... 11

3.1.4 Abbreviations and acronyms .......................................................................................................... 12

4 ARCHITECTURE ........................................................................................................................................................ 13

4.1 Multi-AP architecture ................................................................................................................................... 13

4.1.1 Multi-AP example deployment ....................................................................................................... 13

5 MULTI-AP ONBOARDING ......................................................................................................................................... 17

5.1 1905 Push Button Configuration method .................................................................................................... 17

5.2 Backhaul STA onboarding procedure ......................................................................................................... 17

6 MULTI-AP DISCOVERY ............................................................................................................................................. 19

6.1 Multi-AP controller discovery ...................................................................................................................... 19

6.2 Multi-AP service discovery .......................................................................................................................... 19

6.3 Client association and disassociation notification ....................................................................................... 19

7 MULTI-AP CONFIGURATION .................................................................................................................................... 20

7.1 AP configuration .......................................................................................................................................... 20

7.2 AP operational BSS reporting ..................................................................................................................... 21

7.3 Policy configuration ..................................................................................................................................... 21

8 CHANNEL SELECTION ............................................................................................................................................. 22

8.1 Channel Preference Query and Report ...................................................................................................... 22

8.2 Channel Selection Request and Report ...................................................................................................... 22

9 CAPABILITY INFORMATION REPORTING .............................................................................................................. 25

9.1 AP capability ............................................................................................................................................... 25

9.2 Client capability ........................................................................................................................................... 25

10 LINK METRIC COLLECTION ..................................................................................................................................... 26

10.1 Backhaul link metrics .................................................................................................................................. 26

10.2 Per-AP link metrics ...................................................................................................................................... 26

10.2.1 Link metric measurements from the AP ........................................................................................ 26

10.3 Per-STA measurements .............................................................................................................................. 27

10.3.1 Associated STA link measurements from the AP ......................................................................... 27

10.3.2 Unassociated STA RSSI measurements from the AP .................................................................. 28

10.3.3 802.11k beacon measurements from the client ............................................................................ 28

10.4 Combined infrastructure metrics ................................................................................................................. 29

11 CLIENT STEERING .................................................................................................................................................... 30

11.1 Controller initiated steering mandate .......................................................................................................... 30

11.2 Controller initiated steering opportunity ...................................................................................................... 30

11.3 Multi-AP Agent initiated RSSI-based steering ............................................................................................ 31

11.3.1 RSSI-based steering rules ............................................................................................................ 31

11.4 Multi-AP Agent determination of target BSS ............................................................................................... 31

11.5 Steering mechanisms .................................................................................................................................. 31

11.6 Client association control mechanism ......................................................................................................... 32

12 BACKHAUL OPTIMIZATION ...................................................................................................................................... 34

13 MULTI-AP MESSAGING SECURITY ......................................................................................................................... 35

14 FOUR-ADDRESS MAC HEADER FORMAT .............................................................................................................. 36

Multi-AP Technical Specification v171212

Used with the permission of Wi-Fi Alliance under the terms as stated in this document.

Page 4 of 66

14.1 Wi-Fi backhaul frame and address handling............................................................................................... 36

14.1.1 Receiver requirements .................................................................................................................. 36

14.1.2 Transmitter requirements .............................................................................................................. 36

14.1.3 Wire backhaul frame and address handling ................................................................................. 37

15 MULTI-AP CONTROL MESSAGING RELIABILITY ................................................................................................... 38

15.1 CMDU reliable multicast transmission ........................................................................................................ 38

15.1.1 CMDU reliable multicast transmission procedures ....................................................................... 38

15.1.2 CMDU reliable multicast reception procedures ............................................................................ 38

16 HIGHER LAYER DATA PAYLOAD OVER 1905 ........................................................................................................ 39

17 MULTI-AP CONTROL MESSAGING ......................................................................................................................... 40

17.1 Multi-AP message format ............................................................................................................................ 40

17.1.1 1905 AP-Autoconfiguration search message format (extended) .................................................. 41

17.1.2 1905 AP-Autoconfiguration response message format (extended) .............................................. 41

17.1.3 1905 AP-Autoconfiguration WSC message format (extended) .................................................... 41

17.1.4 1905 Topology Response message format (extended) ................................................................ 42

17.1.5 1905 Topology Notification message format (extended) .............................................................. 42

17.1.6 AP Capability Query message format ........................................................................................... 42

17.1.7 AP Capability Report message format .......................................................................................... 42

17.1.8 Multi-AP Policy Config Request message format ......................................................................... 42

17.1.9 Channel Preference Query message format ................................................................................ 42

17.1.10 Channel Preference Report message format ............................................................................. 42

17.1.11 Channel Selection Request message format ............................................................................. 42

17.1.12 Channel Selection Response message format ........................................................................... 43

17.1.13 Operating Channel Report message format ............................................................................... 43

17.1.14 Client Capability Query message format .................................................................................... 43

17.1.15 Client Capability Report message format ................................................................................... 43

17.1.16 AP Metrics Query Message format ............................................................................................. 43

17.1.17 AP Metrics Response Message format....................................................................................... 43

17.1.18 Associated STA Link Metrics Query message format ................................................................ 43

17.1.19 Associated STA Link Metrics Response message format .......................................................... 43

17.1.20 Unassociated STA Link Metrics Query message format ............................................................ 43

17.1.21 Unassociated STA Link Metrics Response message format ...................................................... 44

17.1.22 Beacon Metrics Query message format ..................................................................................... 44

17.1.23 Beacon Metrics Response message format ............................................................................... 44

17.1.24 Combined Infrastructure Metrics message format ...................................................................... 44

17.1.25 Client Steering Request message format ................................................................................... 44

17.1.26 Client Steering BTM Report message format ............................................................................. 44

17.1.27 Client Association Control Request message format ................................................................. 44

17.1.28 Steering Completed message format ......................................................................................... 44

17.1.29 Backhaul Steering Request message format ............................................................................. 44

17.1.30 Backhaul Steering Response message format ........................................................................... 45

17.1.31 Higher layer data message format .............................................................................................. 45

17.1.32 1905 Ack message format .......................................................................................................... 45

17.2 Multi-AP TLVs format .................................................................................................................................. 45

17.2.1 SupportedService TLV format ....................................................................................................... 45

17.2.2 SearchedService TLV format ........................................................................................................ 45

17.2.3 AP Radio Identifier TLV format ..................................................................................................... 46

17.2.4 AP Operational BSS TLV format ................................................................................................... 46

17.2.5 Associated Clients TLV format ...................................................................................................... 46

17.2.6 AP Capability TLV format .............................................................................................................. 47

17.2.7 AP Radio Basic Capabilities TLV format ...................................................................................... 47

17.2.8 AP HT Capabilities TLV format ..................................................................................................... 48

17.2.9 AP VHT Capabilities TLV format ................................................................................................... 48

17.2.10 AP HE Capabilities TLV format ................................................................................................... 49

17.2.11 Steering Policy TLV format ......................................................................................................... 50

17.2.12 Metric Reporting Policy TLV format ............................................................................................ 51

17.2.13 Channel Preference TLV format ................................................................................................. 52

Multi-AP Technical Specification v171212

Used with the permission of Wi-Fi Alliance under the terms as stated in this document.

Page 5 of 66

17.2.14 Radio Operation Restriction TLV format ..................................................................................... 53

17.2.15 Transmit Power Limit TLV format ............................................................................................... 54

17.2.16 Channel Selection Response TLV format ................................................................................... 54

17.2.17 Operating Channel Report TLV format ....................................................................................... 55

17.2.18 Client Info TLV format ................................................................................................................. 55

17.2.19 Client Capability Report TLV format ........................................................................................... 56

17.2.20 Client Association Event TLV format .......................................................................................... 56

17.2.21 AP Metric Query TLV format ....................................................................................................... 56

17.2.22 AP Metrics TLV format ................................................................................................................ 56

17.2.23 STA MAC Address Type TLV format .......................................................................................... 57

17.2.24 Associated STA Link Metrics TLV format ................................................................................... 58

17.2.25 Unassociated STA Link Metrics Query TLV format .................................................................... 58

17.2.26 Unassociated STA Link Metrics Response TLV format .............................................................. 59

17.2.27 Beacon Metrics Query TLV format .............................................................................................. 59

17.2.28 Beacon Metrics Response TLV format ....................................................................................... 60

17.2.29 Steering Request TLV format ..................................................................................................... 60

17.2.30 Steering BTM Report TLV format ............................................................................................... 61

17.2.31 Client Association Control Request TLV format ......................................................................... 62

17.2.32 Backhaul Steering Request TLV format ..................................................................................... 62

17.2.33 Backhaul Steering Response TLV format ................................................................................... 63

17.2.34 Higher Layer Data TLV format .................................................................................................... 63

17.2.35 Associated STA Traffic Stats TLV ............................................................................................... 63

17.2.36 Error Code TLV format ................................................................................................................ 64

APPENDIX A (INFORMATIVE) MISCELLANEOUS ......................................................................................................... 66

A.1 Higher layer protocol field definition (see 16) ............................................................................................. 66

A.2 Indication of associated 802.11 clients ....................................................................................................... 66