1. VHT Capabilities and Operation elements and VHTC field
Month Year
doc.: IEEE yy/xxxxr0
VHT Capabilities and Operation elements and VHTC field
Date:
Authors:
Yong Liu, Marvell
John Doe, Some Company

2. Contents VHT Capabilities element VHT Operation element
VHT Control field
Yong Liu, Marvell

3. VHT Capabilities element
Yong Liu, Marvell

4. HT Capabilities element
The HT Capabilities element is present when dot11HighThroughputOptionImplemented attribute is true
The HT Capabilities element contains a number of fields that are used to advertise optional HT capabilities of an HT STA
The HT Capabilities element is present in Beacon, Association Request, Association Response, Reassociation Request, Reassociation Response, Probe Request, and Probe Response frames
An HT STA declares that it is an HT STA by transmitting the HT Capabilities element
HT BSS is a BSS in which Beacon frames transmitted by an HT station (STA) include the HT Capabilities element
Yong Liu, Marvell

5. VHT Capabilities element
What capabilities are included in VHT Capabilities element?
Capabilities for VHT but not for HT; and
Capabilities for both HT and VHT, but have different definitions and/or scopes for HT and VHT; and
Capabilities for both HT and VHT, and need to be set independently for HT and VHT
A VHT STA declares that it is a VHT STA by transmitting both the VHT Capabilities element and HT Capabilities element
Yong Liu, Marvell

6. Capabilities Info: HT vs. VHT
(OK)
(Change)
(TBD)
(Change)
(Change)
(OK)
(Change)
(TBD)
(Change)
(TBD)
(TBD)
(TBD)
(TBD)
(TBD)
Yong Liu, Marvell

7. Other fields: HT vs. VHT (Change) (OK) (TBD) (Change) (TBD)
Yong Liu, Marvell

8. VHT Capabilities element
x: 0-7 =>
2(13+x) -1 B
Element ID
Length
VHT Capabilities Info
A-MPDU Parameters
Supported MCS Set
Beamforming Capabilities
Octets: 1 2
(TBD) 1
LDPC Coding Capabilities
Supported Channel Width Set
Short GI for 20/40/80/160
Tx STBC
RX STBC
Max A-MSDU Len.
Tx MU MIMO
Rx MU MIMO
Other fields
Bits: 1 2
(TBD) 1
00: No support for 160MHz and 80+80MHz
01: Support 160MHz
10: Support 80+80MHz
11: reserved
00: 3839B
01: 7935B
10: 11414B
11: rsvd
Support at least 2x1 STBC
Yong Liu, Marvell

9. Pre-motion 1
Should the spec framework document be updated to include a VHT Capabilities element defined in slide 8?
Yes No
Abstain
Yong Liu, Marvell

10. VHT Operation element
Yong Liu, Marvell

11. HT Operation element
The HT Operation element is included by an AP when dot11HighThroughputOptionImplemented attribute is true.
The operation of HT STAs in the BSS is controlled by the HT Operation element.
Yong Liu, Marvell

12. Operation element: HT vs. VHT
(Change)
(Change)
(Change)
(Change)
(TBD)
(TBD)
(TBD)
(TBD)
(TBD)
(TBD)
(TBD)
(TBD)
Yong Liu, Marvell

13. VHT Operation Element
Element ID
Length
VHT Operation Information
Basic MCS Set
Octets: 1 2
(TBD)
STA Channel Width
Channel Center Frequency Segment 1
Channel Center Frequency Segment 2
Other Fields
Octets: 1 1
TBD
0: 20MHz
1: 40MHz
2: 80MHz
3: 160MHz
4: 80+80MHz
Channel number corresponding to the center frequency for 20/40/80/160MHz or 1st
segment of 80+80MHz
Channel number corresponding to the center frequency for 2nd segment of 80+80MHz; set to 0 for 20/40/80/160MHz
Note that the primary/secondary channels are indicated in the HT operation element
Yong Liu, Marvell

14. Pre-motion 2
Should the spec framework document be updated to include a VHT Operation element defined in slide 13?
Yes No
Abstain
Yong Liu, Marvell

15. VHTC field
Yong Liu, Marvell

16. 11n HTC field
The HT Control field is always present in a Control Wrapper frame and is present in QoS Data and management frames as determined by the Order bit of the Frame Control field
Yong Liu, Marvell

17. VHTC field (1) (TBD) (TBD) VHT-MFB Change it to “HT/VHT”: 0: HTC
Yong Liu, Marvell

18. VHTC field (2)
The HT/VHT Control field is always present in a Control Wrapper frame and is present in QoS Data and management frames as determined by the Order bit of the Frame Control field
An HT/VHT subfield is added to the HT/VHT control field
The HT/VHT subfield (TBD) is set to 0 to indicate an HTC field
The HT/VHT subfield (TBD) is set to 1 to indicate a VHTC field
Yong Liu, Marvell

19. Pre-motion 3
Should the spec framework document be updated to define HT/VHT control field as in slide 18?
Yes No
Abstain
Yong Liu, Marvell