the condition is not a requirement. Yuichi In order to allow efficient use of SR Add "If the Rejected the – Morioka resource, STA should be allowed to PHYCCARESET.request primitive concept is subtract the time it took to is issued before the end of the interesting, but determine that the received PPDU PPDU, the Backoff counter of the proposed is an inter-BSS PPDU from its BO the STA may be decremented by resolution is timer. the time it took from the incomplete This is especially important to beginning of the PPDU the because it creates effectively utilize the SR resource, PHYCCARESET.request primitive a new problem – because by the time the BO was issued" i.e. the simple expires in many cases the OBSS subtraction PPDU would be already be proposed will finished. cause all STAs with a backoff count less than the the determination time to hit zero at the same time causing a collision a – complete proposal needs to deal with this problem. Yuichi Even if the TXOP is limited to the Add description as to how the Revise see – Morioka duration of the PPDU, the STA is SR PPDU will not collide with resolution for CID allowed to send an SR PPDU that response to MU transmission. 14278 which adds extends beyond the end of the further restriction. TXOP. This SR PPDU will collide with the response of the MU transmission. Yusuke This rule limits the TXOP obtained Add "and the duration of Revised agree – Tanaka by the OBSS_PD mechanism to the transmitting PPDU not with the 8 duration of the HE MU PPDU to exceed the end of the PPDU" commenter. Apply prevent interfering. According to after "the TXOP shall be limited the changes as IEEE802.11 2016, start of PPDU to the duration of the PPDU" proposed in doc . shall be within TXOP but end of PPDU could exceed the end of TXOP so limitation of TXOP is not enough and the duration of PPDU must be limited as well. Albert Missing periods add missing periods the end of Revised agree – Petrick all subbullet text in this clause with the comment. Apply the changes as in doc .
the condition is not a requirement. Yuichi Morioka In order to allow efficient use of SR resource, STA should be allowed to subtract the time it took to determine that the received PPDU is an inter-BSS PPDU from its BO timer. This is especially important to effectively utilize the SR resource, because by the time the BO expires in many cases the OBSS PPDU would be already be finished. Add "If the PHYCCARESET.request primitive is issued before the end of the PPDU, the Backoff counter of the STA may be decremented by the time it took from the beginning of the PPDU the PHYCCARESET.request primitive was issued" Rejected – the concept is interesting, but the proposed resolution is incomplete because it creates a new problem – i.e. the simple subtraction proposed will cause all STAs with a backoff count less than the the determination time to hit zero at the same time causing a collision – a complete proposal needs to deal with this problem. Yuichi Morioka Even if the TXOP is limited to the duration of the PPDU, the STA is allowed to send an SR PPDU that extends beyond the end of the TXOP. This SR PPDU will collide with the response of the MU transmission. Add description as to how the SR PPDU will not collide with response to MU transmission. Revise – see resolution for CID 14278 which adds further restriction. Yusuke Tanaka This rule limits the TXOP obtained by the OBSS_PD mechanism to the duration of the HE MU PPDU to prevent interfering. According to IEEE802.11 2016, start of PPDU shall be within TXOP but end of PPDU could exceed the end of TXOP so limitation of TXOP is not enough and the duration of PPDU must be limited as well. Add "and the duration of transmitting PPDU not exceed the end of the PPDU" after "the TXOP shall be limited to the duration of the PPDU" Revised – agree with the commenter. Apply the changes as proposed in doc . Albert Petrick Missing periods add missing periods the end of all subbullet text in this clause Revised – agree with the comment. Apply the changes as in doc . 8
11-17-1852-07-00ax-cr-for-27-9.docx