AP Power Down Notification Month Year doc.: IEEE 802.11-yy/xxxxr0 Sept 2008 AP Power Down Notification Date: 2008-09-08 Authors: Allan Thomson, Cisco Systems John Doe, Some Company

Month Year doc.: IEEE 802.11-yy/xxxxr0 Sept 2008 Abstract At the July meeting we presented a proposal on how an AP infrastructure could communicate to clients when one or more APs will be powered down to provide improved power savings for non-AP STAs Straw Poll Results: Do you think a normative text proposal on AP Power Notification should be considered for inclusion in TGv? Yes: 14 No: 0 Don’t care: 3 Allan Thomson, Cisco Systems John Doe, Some Company

Sept 2008 The proposal summary… Add Power Down Duration sub-element to BSS Transition Management Request frame Used for BSS sending the request frame Add Power Down Duration sub-element to Neighbor Report Optionally used for each AP in the BSS Transition Candidate list if separate duration is required Add Power Down Delay option to BSS Transition Management Response frame Allows the non-AP STA to delay power down provided AP policy allows it Allan Thomson, Cisco Systems

BSS Transition Management Request Frame Changes Sept 2008 BSS Transition Management Request Frame Changes Modify BSS Transition Management Request Frame to indicate power down information Frame may be sent individually addressed or group addressed New Power Down Duration sub-element A 2 octet unsigned integer that represents the number of minutes the APs specified in the candidate list are going to be shutdown for Field is reserved if value 0 If the candidate list is empty then all APs in the ESS will be shutdown for the duration Allan Thomson, Cisco Systems

Power Down Duration Sub-element Sept 2008 Power Down Duration Sub-element Sub-element includes power down TSF and duration Power Down TSF provides estimate of when power down will occur Power Down Duration provides length of power down Allan Thomson, Cisco Systems

Modified Request Mode Additional bit added to Request Mode field Sept 2008 Modified Request Mode Additional bit added to Request Mode field Power Down Included bit indicates the Power Down Duration Sub-element is included in the frame A non-AP STA may take advantage of this information or not Allan Thomson, Cisco Systems

BSS Transition Management Response - Power Down Sept 2008 BSS Transition Management Response - Power Down STAs may be send a BSS Transition Management Response frame in response to a BSS Transition Management Request frame Two new status codes 1) Allows a STA to indicate to the AP that it requests the AP remains active 2) Allows a STA to indicate to the AP that it requests a delay in the shutdown by X minutes STA would provide power down delay parameter in addition to status code Power Down Delay field include time estimate for delay from non-AP STA AP policy (beyond scope) may choose to accept or deny STA’s request New Status code value as indicated Allan Thomson, Cisco Systems

Sept 2008 Questions ? Allan Thomson, Cisco Systems

Sept 2008 Motion Move to incorporate the normative text in 08/0947r0 into the TGv draft Yes: No: Don’t care: Allan Thomson, Cisco Systems