Hi Dmitry,
For the following question: After P-EDCA DS CTS frame, it’s in TXOP of the CTS duration. So AIFSN[2] is not correct. It should be SIFS.
Another question is: The STAs around would lose medium synchronization because they missed the L-STF of the next PPDU at the end of the protected duration by DS CTS frame. What
do you think on it?
Xiangxin Gu
Why AIFSN[2] is needed in P-EDCA contention? It's in protected duration.
Answer :
The value of AIFSN[AC] shall be greater than or equal to 2 for non-AP STAs
BR,
Xiangxin Gu
Communication Standards Devision
From: Akhmetov, Dmitry <Dmitry.Akhmetov@xxxxxxxxx>
Sent: Thursday, March 27, 2025 11:04 PM
To: STDS-802-11-TGBN@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBN] P-EDCA questions and answers from the chat
Hi,
Please find below answers to the questions I captured from the chat of Webex regarding document 2007r5:
Binita Gupta :
"A P-EDCA eligible STA may start a P-EDCA contention to deliver buffered traffic" ―> "A P-EDCA eligible STA may start a P-EDCA contention to deliver buffered traffic if the TBD conditions are met". Need to include
reference to conditions in this 'may requirement'
Patrice NEZOU:
Agree with Binita. P-EDCA eligible STA shall have LL traffics to deliver in AC_VO
Answer: If I got the comment correctly, it is about sentence on p3L34. In fact, the following lines (36-40) completely cover that:
To start P-EDCA contention the P-EDCA eligible STA shall transmit [#339] CTS frame if the following conditions are satisfied:
・
A PEDCA is enabled by the AP in the BSS
・
P-EDCA eligible STA has AC_VO traffic buffered traffic
・
Other TBD conditions
Gaius Wee:
“ p4L28. "did not to receive CTS frame". Should delete "to"
Answer: Ack, corrected
Liwen Chu, Mohamed Abouelseoud
this (setting to AP's MAC address) is not optimized solution.
Answer: Ok , we can definitely discuss this further. Leaving “RA field set to MAC address of an AP…” TBD for now.
Binita Gupta
"A P-EDCA eligible STA that did not initiate a TXOP (see
10.23.2.4) using P-EDCA contention or did not to receive CTS frame in response to the RTS frame used to initiate the TXOP obtained using P-EDCA contention may transmit CTS frame without invoking backoff procedure as in
10.23.2.4 to start another P-EDCA contention, for up to TBD retries."
On this part there is no motion, so need more discussion
Answer: this is motioned as a part of the motion 272
Xiangxin Gu
Why AIFSN[2] is needed in P-EDCA contention? It's in protected duration.
Answer :
The value of AIFSN[AC] shall be greater than or equal to 2 for non-AP STAs
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