VHT NAV Assertion Date: 2011-01-17 Authors: Month Year doc.: IEEE 802.11-yy/xxxxr0 VHT NAV Assertion Date: 2011-01-17 Authors: Yong Liu, Marvell John Doe, Some Company

NAV assertion in 20/40 MHz BSS An HT STA shall update its NAV using the Duration/ID field value in any frame received in a 20 MHz PPDU in the primary channel or received in a 40 MHz PPDU and that does not have an RA matching the STA’s MAC address. NOTE—A STA need not set its NAV in response to 20 MHz frames received on the secondary channel or any other channel that is not the primary channel, even if it is capable of receiving those frames. Yong Liu, Marvell

VHT NAV assertion Issues on secondary channel NAVs and multiple NAVs complicate designs require detecting/decoding frames transmitted solely in secondary channels hard to maintain secondary channel NAV when transmitting on the primary channel Proposal: Simply extend HT NAV assertion rules to 20/40/80/160 VHT BSS A VHT STA shall update its NAV using the Duration/ID field value in any frame received in a 20 MHz PPDU in the primary 20 MHz channel or received in a 40 MHz PPDU in the primary 40 MHz channel or received in a 80MHz PPDU in the primary 80 MHz channel or received in a 160 MHz or 80+80 MHz PPDU and that does not have an RA matching the STA’s MAC address. NOTE—A STA need not set its NAV in response to 20/40/80 MHz frames received on any channel that is not or does not include the primary channel, even if it is capable of receiving those frames. Yong Liu, Marvell

Pre-motion Should the spec framework document be updated to define VHT NAV assertion as following? A VHT STA shall update its NAV using the Duration/ID field value in any frame received in a 20 MHz PPDU in the primary 20 MHz channel or received in a 40 MHz PPDU in the primary 40 MHz channel or received in a 80MHz PPDU in the primary 80 MHz channel or received in a 160 MHz or 80+80 MHz PPDU and that does not have an RA matching the STA’s MAC address. NOTE—A STA need not set its NAV in response to 20/40/80 MHz frames received on any channel that is not or does not include the primary channel, even if it is capable of receiving those frames. Yes No Abstain Yong Liu, Marvell