Achieving 20 Marks for A02 Deadline
This content discusses strategies to secure 20 marks for the A02 deadline, focusing on conducting thorough research, using various resources, and interpreting data effectively.
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doc.: IEEE 802.11-20/0432r2 Mar 2020 Bug Fix for Acknowledgement rule in Multi-link Date: 2020-03-15 Authors: Name Affiliations Address Phone Email Yunbo Li Shenzhen, China liyunbo@Huawei.com Yuchen Guo Yifan Zhou Huawei Guogang Huang Yiqing Li Ming Gan Submission Slide 1 Yunbo Li (Huawei)
doc.: IEEE 802.11-20/0432r2 Mar 2020 Motivation Below motion is passed in Jan 2020 IEEE meeting Motion 63: The receive status of QoS Data frames of a TID received on a link shall be signaled on the same link and may be signaled on other available link(s) The QoS Data with Ack Policy of No Ack doesn t need to be acknowledged, and should be excluded from the rules; Current rule is too strict in some case when the Ack Policy is Block Ack; (examples showed in next slides) Modification is proposed to fix above issues. Submission Slide 2 Yunbo Li (Huawei)
doc.: IEEE 802.11-20/0432r2 Mar 2020 Example 1 An example shown in below figure BA1 contains the acknowledgement of MSDU with sequence number 1-20, and all corresponding bits are set to 1; BAR2 set SSN=21 to move the WinStartB to 21; In this example, the MSDUs with SN 11-20 already be acknowledged in link 1, and can not be acknowledged in link 2 where they are transmitted because of the shift of WinStartB; The example is reasonable, but doesn t follow the rule that data and acknowledgement shall be transmitted on the same link. SN:1-10 SSN=21 SSN=1 SN:21-30 Link 1 BAR2 BA2 A-MPDU1 BAR1 BA1 A-MPDU2 SN:31-40 SN:11-20 A-MPDU3 A-MPDU4 Link 2 Submission Slide 3 Yunbo Li (Huawei)
doc.: IEEE 802.11-20/0432r2 Mar 2020 Example 2 Another example shown in below figure BA1 contains the acknowledgement of MSDU with sequence number 1-10, and all corresponding bits are set to 1; BAR2 set SSN=11 to move the WinStartB to 11; In this example, the MSDUs with SN 1-10 already be acknowledged in link 1, so it doesn t need to be acknowledged in link2 once more; The acknowledgement of MSDU 1-10 can not be transmitted in link2 anymore because BAR2 shift the WinStartB to 11; The example is reasonable, but doesn t follow the rule that data and acknowledgement shall be transmitted on the same link. SN:1-10 SSN=11 SSN=1 SN:11-20 Link 1 BAR2 BA2 A-MPDU1 BAR1 BA1 A-MPDU2 SN:11-20 SN:1-10 A-MPDU3 A-MPDU4 Link 2 Submission Slide 4 Yunbo Li (Huawei)
doc.: IEEE 802.11-20/0432r2 Mar 2020 Proposed Modification The receive status of a MSDU or A-MSDU in a QoS Data frames of a TID received on a link shall be signaled on the same link unless at least one of following conditions is true: The receive status of the MSDU or A-MSDU has already be signaled in other available link(s) with corresponding bit in the BA be set to 1; The corresponding Ack Policy of the MSDU or A-MSDU is set to No Ack. The receive status of a MSDU or A-MSDU in a QoS Data frames of a TID received on a link may be signaled on other available link(s) if the Ack Policy is not set to No Ack. Submission Slide 5 Yunbo Li (Huawei)
doc.: IEEE 802.11-20/0432r2 Mar 2020 Straw Poll 1 Do you agree to modify acknowledgement rule in multi-link as below: The receive status of a MSDU or A-MSDU in a QoS Data frames of a TID received on a link shall be signaled on the same link if a BA response is needed, and the SN of the MSDU or A-MSDU is larger or equal to SSN in BA frame. Yes No Abstain Submission Slide 6 Yunbo Li (Huawei)
doc.: IEEE 802.11-20/0432r2 Mar 2020 Straw Poll 2 Do you agree to modify acknowledgement rule in multi-link as below: The receive status of a MSDU or A-MSDU in a QoS Data frames of a TID received on a link may be signaled on other available link(s) if the Ack Policy is not set to No Ack. Yes No Abstain Submission Slide 7 Yunbo Li (Huawei)
doc.: IEEE 802.11-20/0432r2 Mar 2020 Straw Poll 1 backup Do you agree to modify acknowledgement rule in multi-link as below: The receive status of a MSDU or A-MSDU in a QoS Data frames of a TID received on a link shall be signaled on the same link unless at least one of following conditions is true: The receive status of the MSDU or A-MSDU has already be signaled in other available link(s) with corresponding bit in the BA be set to 1; The corresponding Ack Policy of the MSDU or A-MSDU is set to No Ack. Yes No Abstain Submission Slide 8 Yunbo Li (Huawei)
