IEEE P802.11 Wireless LANs OPS Date: 2018-03-01 Author(s): Name Affiliation Address Phone email Laurent Cariou laurent.cariou@intel.com Introduction Interpretation of a Motion to Adopt A motion to approve this submission means that the editing instructions and any changed or added material are actioned in the TGax Draft. The introduction and the explanation of the proposed changes are not part of the adopted material. Editing instructions formatted like this are intended to be copied into the TGax Draft (i.e. they are instructions to the 802.11 editor on how to merge the text with the baseline documents). TGax Editor: Editing instructions preceded by “TGax Editor” are instructions to the TGax editor to modify existing material in the TGax draft. As a result of adopting the changes, the TGax editor will execute the instructions rather than copy them to the TGax Draft. CID Comment Proposed Change Resolution 11019 137 OPS Support subfield applies only if the STA supports Broadcast TWT Replace text in 'Encoding' column to: "If Broadcast TWT Support subfield is 1 Set to 1 if supported. Set to 0 otherwise. Reserved otherwise." Revised – OPS is currently using only the TWT element to determine when the TIM frame is sent. Support on STA or AP side of BC TWT is not needed. OPS works without BC TWT in a much simpler way. Define OPS frame to be self contained. Apply the changes proposed in doc 768r. 12032 119 Please ensure that TIM element used in TIM frame or FILS Discovery frame also describes "traditional TIM bit setting rule" that is used for non-OPS STAs. Add the folllowing bulleted text to line 44:" Bit Number N that corresponds to non-OPS STA with AID N is 1 to indicate that AP has buffered frames for the STA and set to 0 otherwise." Revised – agree with the commenter. Apply the changes in doc 768r. Discussion TWT is designed for STAs in PS mode. It allows to schedule the time spent in awake and doze state. 2
Order Information Notes 6 Vendor Specific element One or more Vendor Specific elements are optionally present. 7 TIM element The TIM element is optionally present if(#Ed) dot11HEOptionImplemented is true, otherwise it is not present. 8 TWT element The TWT element is optionally present if(#Ed) dot11HEOptionImplemented is true, otherwise it is not present. If present, the Broadcast field of the TWT element is 1(#12046) Editor: Modify subclause 27.14.3 Opposrtunistic save as follows: Opportunistic power save(#6041) General An OPS STA is a non-AP HE STA that sets the OPS Support subfield in the HE MAC Capabilities Information field of the HE Capabilities element to 1(#Ed). An OPS AP is an AP HE STA that sets the OPS Support subfield in the HE MAC Capabilities Information field in HE Capabilities element to 1(#Ed). Opportunistic power save mechanism has the objective to allow OPS STAs to opportunistically go to doze state for a defined period. an OPS AP Based on this information, the OPS STAs may opportunistically go to doze state . , an OPS AP splits a beacon interval into several periodic broadcast TWT SPs and provides, at the beginning of each SP, the scheduling information for all OPS STAs. Based on this information, the OPS STAs may opportunistically go to doze state until the next TWT SP. AP operation for opportunistic save (#5509)To enable opportunistic power save, an OPS AP shall To enable opportunistic power save, an OPS AP shall include a TWT element in beacons to set a periodic Broadcast TWT SP with the following information: The TWT flow identifier field set to 3 The Broadcast TWT ID subfield is set to 0
The bit number N in the traffic indication virtual bitmap that corresponds to an OPS STA with AID N is determined as follows: Bit number N in the traffic indication virtual bitmap is 0 if the OPS AP does not intend to transmit to the OPS STA including to trigger the OPS STA for an UL MU transmission during the TWT SP and before the next TWT SP. Otherwise, bit number N in the traffic indication virtual bitmap for the OPS STA is 1.