January 2016 doc.: IEEE 802.11-16/0169r1
IEEE P802.11 Wireless LANs
802.11
Resolutions to CIDs 60 and 229
(relative to P802.11ak D1.4 and IEEE REVmc Draft 45.0)
Date: 2016-01-20
Author(s): Name Company Address Phone Email Ganesh 2111 NE 25th Ave, Hillsboro, 503 334 Intel Corporation [email protected] Venkatesan OR 97124 6720 m
Abstract
This submission resolves comments 60, and 229 from Letter Ballot 212.
History: r0 – initial submission
Submission page 1 Ganesh Venkatesan, Intel Corporation January 2016 doc.: IEEE 802.11-16/0169r1
CID Page.Line Clause Comment Proposed Change Resolution
60 How does GLK work Please either REVISE: GLK with 802.11ad's fast disallow use of GLK property of a link session transfer? with FST, or Is dependent on Can a session be describe in the FST support at the transferred subclauses any MAC layer. Hence seamlessly across limitations as to its a GLK STA GLK links? Do old use with GLK. supports GLK and new links have irrespective of the to have the same PHY that Is GLK capability? currently active. FST procedure executes as specified and result in seamless transfer and maintain the link's GLK property. Hence the new and old links have the same GLK property. Insert at the end of paragraph 3 in 10.47.2 " In the case of FST, the GLK link metric is measured relative to the MAC SAP regardless of which PHY is used to exchange MSDUs." 229 58.19 10.2.7 This clause is not Recommend REVISE: The practical to replacing lines 19- commenter implement. An 11ak 26 with stronger withdrew the Client should either requirements for security violation opt out of multicast, Clients. part of the or not enter power comment. See save. Changing 16/0169 AMSDU aggregation addressing the based on changes of rest of the PS state. It is also comment. technically a security violation, when related to GCR retries.
Insert a new subclause after 10.2.6 as follows:
Submission page 2 Ganesh Venkatesan, Intel Corporation January 2016 doc.: IEEE 802.11-16/0169r1
10.2.7 Power management with GLK links Power management has different behaviors for STAs that have established GLK links (associations) modifying the behaviors listed in the previous sections.
It is recommended that a STA using a GLK link that carry moderate to heavy traffic loads not use power save modes, due to the increased delay and jitter it would cause. However, GLK STAs that find power save mode useful may utilize the features described above while performing behaviors in this subclause.
A GLK-capable AP shall not buffer any group addressed data frames with a SYNRA RA, regardless of the power save state of any associated STAs. Data frames with SYNRA RA are queued for transmission to associated GLK STAs that are not currently as if no STA in its BSS were in PS mode. See 9.43 (Addressing of GLK data MPDU transmissions), for details on the usage of SYNRA in addressing GLK-STAs in PS mode.
A GLK-capable AP shall not include any associated GLK STA that is in PS mode as a recipient in a SYNRA addressed data frame. Any frame, including a group addressed frame, destined for a GLK STA in PS mode shall be transmitted by the AP with an individually addressed MPDU using either the four address format or Basic A- MSDU format.
NOTE – The net effect of the above is that any GLK non-AP STA in PS mode will result in buffered, and potentially duplicated (if there are multiple receivers) MPDUs, for all traffic for which the PS mode STA is a recipient. Such a STA should ensure that the 802.1Q bridge at the AP is using higher-layer facilities to filter traffic being sent to the STA so as to the STA to limit the amount of buffered traffic.
A GLK STA that has enabled GLK-GCR on its GLK link shall not enter Power Save mode.
10.47.2 Reported GLK link metrics The bridge management protocols in 802.1Q require link metrics for each GLK link. GLK STAs shall provide six metrics for their GLK links. One such metric is the maximum rate of transmission the GLK STA is capable of given its available features and those of the STA with which it is communicating and is available in the dot11GLKLinkRawRate variable. The other metrics as specified below, are the minimum, average, geometric mean, and composite link rate, and the standard deviation of a windowed set of link rate samples, and a composite link rate.
NOTE—The passing of link metrics from a GLK STA to the attached 802.1Q bridge is implementation dependent.
For each GLK association, direct link, or mesh peering with a STA there is an array of sample window data rates. Each such array consists of rate sample windows R[0] to R[N+1] in units of 100 kb/s, where N is the value of dot11GLKLinkRateSamples. Each sample window covers a time period of dot11GLKLinkRateWindowSize×16 TUs. When the association or peering is created, R[0] through R[N+1] are initialized to the lowest data bit rate the STA is configured to use. In the case of FST, the GLK link metric is measured relative to the MAC SAP regardless of which PHY is used to exchange MSDUs.
Submission page 3 Ganesh Venkatesan, Intel Corporation