Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
VHT Capabilities and Operation elements
and VHTC field
Date: 2010-11-08
Authors:
Name
Affiliations
Yong Liu
Raja Banerjea
Robert Stacey
Matthew Fischer
Hemanth Sampath
James Cho
Youngsoo Kim
Yongho Seok
Jae Seung Lee
Reza Hedayat
ChaoChun Wang
Liwen Chu
Sean Coffey
Marvell
Marvell
Intel
Broadcom
Qualcomm
Atheros
Samsung Electronics
LG Electronics, Inc.
ETRI
Cisco
MediaTek
ST-Ericsson
RealTek
Submission
Address
Phone
email
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
[email protected]
Slide 1
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
Contents
• VHT Capabilities element
• VHT Operation element
• VHT Control field
Submission
Slide 2
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
VHT Capabilities element
Submission
Slide 3
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
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
Submission
Slide 4
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
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
Submission
Slide 5
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
Capabilities Info: HT vs. VHT
(OK)
(TBD)
(TBD)
Submission
(Change)
(Change)
(TBD)
(Change)
(OK) (Change)
(Change)
(TBD)
(TBD)
Slide 6
(TBD)
(TBD)
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
Other fields: HT vs. VHT
(Change)
(OK)
(TBD)
Submission
Slide 7
(Change)
(TBD)
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
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
(TBD)
(TBD)
LDPC Coding
Capabilities
Supported
Channel
Width Set
Short GI for
20/40/80/160
Tx
STBC
RX
STBC
Max AMSDU Len.
Tx MU
MIMO
Rx MU
MIMO
Other
fields
Bits: 1
2
(TBD)
1
(TBD)
2
(TBD)
(TBD)
(TBD)
00: No support for
160MHz and 80+80MHz
01: Support 160MHz
10: Support 80+80MHz
11: reserved
Submission
Support at least
2x1 STBC
Slide 8
00: 3839B
01: 7935B
10: 11414B
11: rsvd
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
Pre-motion 1
• Should the spec framework document be updated to
include a VHT Capabilities element defined in slide 8?
• Yes
• No
• Abstain
Submission
Slide 9
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
VHT Operation element
Submission
Slide 10
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
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.
Submission
Slide 11
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
Operation element: HT vs. VHT
(Change)
(Change)
(Change)
(TBD)
(TBD)
(TBD)
(TBD)
Submission
(Change)
(TBD)
(TBD)
(TBD)
Slide 12
(TBD)
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
VHT Operation Element
Element ID
Length
VHT Operation Information
Basic MCS Set
Octets: 1
2
(TBD)
(TBD)
STA Channel Width
Channel Center
Frequency Segment 1
Channel Center
Frequency Segment 2
Other Fields
Octets: 1
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
Submission
Slide 13
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
Pre-motion 2
• Should the spec framework document be updated to
include a VHT Operation element defined in slide 13?
• Yes
• No
• Abstain
Submission
Slide 14
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
VHTC field
Submission
Slide 15
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
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
Submission
Slide 16
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
VHTC field (1)
(TBD)
(TBD)
VHT-MFB
Change it to “HT/VHT”:
0: HTC
1: VHTC
Submission
Slide 17
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
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
Submission
Slide 18
Yong Liu, Marvell
Nov. 8, 2010
doc.:IEEE 802.11-10/1267r0
Pre-motion 3
• Should the spec framework document be updated to
define HT/VHT control field as in slide 18?
• Yes
• No
• Abstain
Submission
Slide 19
Yong Liu, Marvell