Thread Links | Date Links | ||||
---|---|---|---|---|---|
Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
--- This message came from the IEEE 802.11 Task Group M Technical Reflector ---
Maybe, because the current definition of SPP A-MSDU and description of dot11SPPAMSDUCapable imply PV0 by mention of the
QoS Control field, we could just say the following instead? Change 10.11 A-MSDU operation as follows: A non-DMG STA indicates support for payload protected A-MSDUs (PP A-MSDUs) or
signaling and payload protected A-MSDUs (SPP A-MSDUs), when dot11RSNAActivated is true, in its RSNXE. A non-DMG STA and its peer STA both determine and maintain a record of whether an encrypted A-MSDU sent to its peer is to be a PP A-MSDU or an SPP A-MSDU based on the SPP A-MSDU Capable subfield of the Extended RSN Capabilities field of the RSNXE (see 9.4.2.241 (RSN Extension element (RSNXE))). If a STA and its peer STA are DMG STAs or both have their SPP A-MSDU Capable subfields equal to 1, A-MSDUs shall be transmitted as SPP A-MSDUs and shall not be transmitted in PV1 MPDUs. Otherwise, A-MSDUs shall be transmitted as PP A-MSDUs.(M57) NOTE—A PV1 MPDU cannot contain an SPP A-MSDU because the
signaling of whether an A-MSDU is being carried is not part of the AAD (see Figure 12-20—AAD construction for PV1 MPDUs) and so is not protected. Reception and transmission of A-MSDUs using a non-RSN association is unaffected by the value of the SPP A-MSDU Capable subfield.(M57) An AP may transmit an SPP A-MSDU for a GCR group address if it has successfully negotiated RSNA (re)associations with all associated STAs that have an active GCR agreement for this group address. (No changes to 3.2 SPP A-MSDU definition or C.3 dot11SPPAMSDUCapable description.) Thanks, Mark --
Mark RISON, Standards Architect, WLAN English/Esperanto/Français Samsung Cambridge Solution Centre Tel: +44 1223 434600 Innovation Park, Cambridge CB4 0DS Fax: +44 1223 434601 ROYAUME UNI WWW:
http://www.samsung.com/uk From:
Mark Rison <m.rison@xxxxxxxxxxx> --- This message came from the IEEE 802.11 Task Group M Technical Reflector ---
Regarding CID 1555, discussed on Monday, further investigation has shown that while the SID has a bit that tells you whether what is being carried is an A-MSDU or a plain MSDU, this bit is not part of the AAD because the AAD expands SIDs to the full MAC address, losing the A-MSDU indication in the process. I therefore propose that CID 1555 be resolved like this (editorial suggestions on how to avoid the ugly "In the context of PV<n> MPDUs," preambles welcome!): Change 10.11 A-MSDU operation as follows:
protected A-MSDUs (SPP A-MSDUs), when dot11RSNAActivated is true, in its RSNXE. A non-DMG STA and its peer STA both determine and maintain a record of whether an encrypted A-MSDU sent to its peer is to be a PP A-MSDU or an SPP A-MSDU based on the SPP A-MSDU Capable subfield of the Extended RSN Capabilities field of the RSNXE (see 9.4.2.241 (RSN Extension element (RSNXE))). If a STA and its peer STA are DMG STAs or both have their SPP A-MSDU Capable subfields equal to 1, A-MSDUs shall be transmitted as SPP A-MSDUs. Otherwise, A-MSDUs shall be transmitted as PP A-MSDUs.(M57) In the content of PV1 MPDUs, when dot11RSNAActivated is true, A-MSDUs shall not be transmitted if a STA and its peer STA both have their SPP A-MSDU Capable subfields equal to 1. NOTE—This is because in a PV1 MPDU the indication of whether an A-MSDU is being carried is not part of the AAD (see Figure 12-20—AAD construction for PV1 MPDUs) and so is not protected. Reception and transmission of A-MSDUs using a non-RSN association is unaffected by the value of the SPP A-MSDU Capable subfield.(M57) An AP may transmit an SPP A-MSDU for a GCR group address if it has successfully negotiated RSNA (re)associations with all associated STAs that have an active GCR agreement for this group address. (No changes to 3.2 SPP A-MSDU definition or C.3 dot11SPPAMSDUCapable description.) Further changes might be made in D2.0 to allow for SPP A-MSDUs in PV1 MPDUs, if a way to make this possible is identified. Thanks, Mark --
Mark RISON, Standards Architect, WLAN English/Esperanto/Français Samsung Cambridge Solution Centre Tel: +44 1223 434600 Innovation Park, Cambridge CB4 0DS Fax: +44 1223 434601 ROYAUME UNI WWW:
http://www.samsung.com/uk
To unsubscribe from the STDS-802-11-TGM list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGM&A=1 To unsubscribe from the STDS-802-11-TGM list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGM&A=1 |