| Thread Links | Date Links | ||||
|---|---|---|---|---|---|
| Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
|
Hi Guogang, I would also like to add one more point regarding to your third comment: “Fairness issue to legacy STA or EHT STA that not support non-primary channel transmission.” Since many EHT non-AP STAs might have narrower bandwidth than its BSS wide bandwidth, some of these EHT STAs might need to park on the non-primary channels
in order to fully utilize the wide bandwidth. The fairness is not only to legacy STAs and EHT STAs parking on the primary channel but also to those EHT STAs who are parking on the non-primary channels. Therefore some enhanced channel access mechanism should
be considered to provide fairness to all STAs in the meanwhile improve the system spectrum efficiency. Thanks, Kaiying From: Vinko Erceg [mailto:00000c44f70266db-dmarc-request@xxxxxxxxxxxxxxxxx]
I would also like to add that 20+ year old WLAN channel access assuming primary being idle is very inefficient mechanism, especially for wide BWs such 80MHz,
160Mhz and 320MHz. Since actual mechanisms are TBD, certainly can be made to fit within regulatory frameworks, LTE (NR-U) has mechanisms to exploit this already in an efficient way. Personally, I think that there is time for change, we should be able to yield
significant gains. And yes, any new amendment is better than the old one - wider BW, higher modulation, lower latency, etc. … then why not include also more efficient channel access? Thanks and Regards,
From: Matthew Fischer [mailto:00000959766b2ff5-dmarc-request@xxxxxxxxxxxxxxxxx]
Guogang, Here are some responses to your specific questions: 1. the proposal provides an optional behavior and the performance depends on the available unused bandwidth, so it is very scenario dependent, but in
any case, whenever it is used, it is taking advantage of BW that is otherwise unused, so it would be a net gain - whether that gain is worth the addition of the mechanism is an individualized tradeoff decision to be made by implementers, but we view the extra
effort for implementation as not far from what is already being done on other channels, and again, if you do not accept the tradeoff, you can opt out by not implementing the option 2. provided that the access rules incorporate some random access, it should be within regulations 3. STA that are members of the BSS and that do not support the transmission or reception on secondary channels should not be affected if they are sharing
the primary channel, as those devices would be shut out of access anyway - i.e. the secondary channel access only occurs when the primary is busy and some secondary channels are available - any STA that is legacy and therefore does not participate in the secondary
channel access will be completely unaffected because they are waiting for the end of the busy condition on the primary channel STAs that are OBSS and that do not support the transmission or reception on secondary channels that are not sharing the primary channel might see more
competitive pressure, but this is not much different than what they already experience from full BW transmissions from the same in-BSS - i.e. this proposal simply means that more of the transmissions from my competing BSS will become full BW, but my BSS has
the right to access the full BW already - this mechanism simply increases the number of TXOPs for which I exercise my full BW rights Matthew Fischer Nice Guy Broadcom Inc. +1 408 543 3370 office On Wed, Sep 16, 2020 at 7:58 AM huangguogang <huangguogang1@xxxxxxxxxx> wrote:
To unsubscribe from the STDS-802-11-TGBE list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBE&A=1 To unsubscribe from the STDS-802-11-TGBE list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBE&A=1 *********** MEDIATEK Confidentiality Notice *********** The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. If you are not an intended recipient of this e-mail, or believe that you have received this e-mail in error, please notify the sender immediately (by replying to this e-mail), delete any and all copies of this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you! To unsubscribe from the STDS-802-11-TGBE list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBE&A=1 |