1. A-MSDU Protection March 2007 Date: 2007-03-15 September 2006
doc.: IEEE /1458r0
March 2007
A-MSDU Protection
Date:
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Wingett, N., et al.
Joonsuk Kim, Broadcom Corp.

2. March 2007
Objective
This submission defines a means to allow the protection of A-MSDUs and coexistence with STAs that do not support A-MSDU protection
This submission addresses CIDs 287, 302, 643, 1117, 1822, 2144, 2835, 3000, 3286
Wingett, N., et al.

3. Capability and Policy Signaling
March 2007
Capability and Policy Signaling
RSN capabilities
Change Figure 91 as shown below B0 B1
B2-3
B4-5 B6 B7 B8 B9
B10
B11
B12-15
Pre-Auth
No Pairwise
PTKSA Replay Counter
GTKSA Replay Counter
AES-128-CMAC
Robust Management Frame protection
Reserved
Peerkey Enabled
A-MSDU protection
HT security
B10: A-MSDU Protection
0 STA does not have the capability to do A-MSDU protection
1 STA does have the capability to do A-MSDU protection
B11: HT Security
0: allows unprotected A-MSDU
1: discards unprotected A-MSDU
Wingett, N., et al.

4. Construction of AAD 8.3.3.3.2 Construct AAD as follows:
March 2007
Construction of AAD
Construct AAD as follows:
g) QC – QoS Control field, if present, a 2-octet field that includes the MSDU priority. The QC TID and, when dot11AMSDUProtected is TRUE, bit 7 (A-MSDU presence) are is used in the construction of the AAD, and the . The remaining QC fields are set to 0 for the AAD calculation (bits 4 to 6 and bits 8 to 15 are set to 0).
Wingett, N., et al.

5. A-MSDU Protection procedures
March 2007
A-MSDU Protection procedures
11.18 A-MSDU Protection procedures
A-MSDU protection is valid only if RSNA is selected to protect data messages and dot11AMSDUProtected is set to TRUE.
A STA may discard unprotected A-MSDUs if dot11HTSecurity is set to TRUE.
A STA may choose not to associate with a STA that does not advertise A-MSDU protection or HT Security in the RSN capabilities.
Wingett, N., et al.

6. STA Behavior March 2007 STA State STA Action A-MSDU Protection = 0,
HT Security = 0
May transmit unprotected A-MSDU
Shall receive unprotected A-MSDU
Shall discard protected A-MSDU
HT Security = 1
Shall not transmit protected or unprotected A-MSDU
Shall discard unprotected A-MSDU
A-MSDU Protection = 1,
Shall not transmit unprotected A-MSDU
If peer STA is A-MSDU Protection capable then
- May transmit protected A-MSDU
- Shall receive protected A-MSDU
- Shall discard unprotected A-MSDU
If peer STA is not A-MSDU Protection capable then
- Shall receive unprotected A-MSDU
- Shall discard protected A-MSDU
Wingett, N., et al.

7. March 2007
Straw Poll
Do you approve of the signaling and station behavior defined in this document and in document /0397 as a resolution to CID’s 287, 302, 643, 1117, 1822, 2144, 2835, 3000, 3286?
Yes:
No:
Abstain:
Wingett, N., et al.

8. March 2007
Motion
Accept the signaling and station behavior defined in document /0397 as a resolution to CID’s 287, 302, 643, 1117, 1822, 2144, 2835, 3000, 3286?
Yes:
No:
Abstain:
Wingett, N., et al.