clear how OCW is shall update its OCW either will cause the OCW handled if the STA to 2 X OCW +1, until reset to OCWmin. transmits a new the the OCW reaches The proposed text already frame. value of OCWmax. be covered by current spec. 174 1 The condition of 1. Change L1-L5 of Accepted- transmitting an HE P174 as follows: trigger-based PPDU "If a STA transmits an Makes the changes as successfully in the HE trigger-based proposed in doc randomly selected PPDU that solicits an RU is not clearly immediate response in defined. a random access RU and the expected response is not received, the transmission is considered unsuccessful and the STA invokes the UL OFDMA-based random access retransmission procedure as defined in 27.5.2.6.3 (Retransmission procedure for random access). Otherwise the transmission is considered successful. 2. delete the note in L58-L60 of P173 since it has been covered 7427 by the above bulletin. 174 15 A HE STA may use define a mechanism to Rejected- OFDMA RA for UL allow HE STAs to transmission. distinguish reasons of The using of UORA not However, if the OFDMA RA failure. forbid the using of EDCA, so OFDMA RA the UORA will not cause the transmission fails, it STA latency of UL has to double its CW transmission. Actually, the for backoff. STAs using UORA may get Comparing to the more chances than the STAs legacy access, the not using UORA. STA may allow to repeat the transmission for a couple of time in PIFS if it does not receive ACK. Therefore the OFDMA based RA may cause extra latency of UL 9572 transmission.
clear how OCW is handled if the STA transmits a new frame. shall update its OCW to 2 X OCW +1, until the the OCW reaches value of OCWmax. either will cause the OCW reset to OCWmin. The proposed text already be covered by current spec. 7427 174 1 The condition of transmitting an HE trigger-based PPDU successfully in the randomly selected RU is not clearly defined. 1. Change L1-L5 of P174 as follows: "If a STA transmits an HE trigger-based PPDU that solicits an immediate response in a random access RU and the expected response is not received, the transmission is considered unsuccessful and the STA invokes the UL OFDMA-based random access retransmission procedure as defined in 27.5.2.6.3 (Retransmission procedure for random access). Otherwise the transmission is considered successful. 2. delete the note in L58-L60 of P173 since it has been covered by the above bulletin. Accepted- Makes the changes as proposed in doc 9572 174 15 A HE STA may use OFDMA RA for UL transmission. However, if the OFDMA RA transmission fails, it has to double its CW for backoff. Comparing to the legacy access, the STA may allow to repeat the transmission for a couple of time in PIFS if it does not receive ACK. Therefore the OFDMA based RA may cause extra latency of UL transmission. define a mechanism to allow HE STAs to distinguish reasons of OFDMA RA failure. Rejected- The using of UORA not forbid the using of EDCA, so the UORA will not cause the STA latency of UL transmission. Actually, the STAs using UORA may get more chances than the STAs not using UORA.
11-17-0751-01-00ax-comment-resolution-on-retransmission-of-ofdma-random-access.docx