Hi Eunsung,
Got it. Thank you for the clarification.
Xiangxin
From: Eunsung Park <esung.park@xxxxxxx>
Sent: Tuesday, April 13, 2021 1:39 PM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBE] An issue of HSR and ESR
Hi Xiangxin,
Thanks for the quick response. Regarding the normalization your understanding is right
(but we cannot simply use ESR-1 since there are 3/6dB gaps between the values).
We had a discussion on the normalization for 11ax as well as 11be in the Ross’s
documents (269 and 440) and members suggested to modify the 11ax spec in REVme. That may be the next step to make the spec clearer.
Best regards,
Eunsung
From:
顾祥新
(Xiangxin Gu) [mailto:Xiangxin.Gu@xxxxxxxxxx]
Sent: Tuesday, April 13, 2021 2:23 PM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGBE] An issue of HSR and ESR
Hi Eunsung,
To my understanding, the intention of the proposal is to enable OBSS HE STA to perform SR during EHT TB PPDU transmission.
So the set HSR is for HE STA usage and should obey the specification of 11ax.
According to 11ax specification, HSR is for 40MHz subchannel while the channel width is 160 MHz.
However, ESR is always for 20MHz subchannel as we agreed.
So the HSR should be set to
ESR-1 (Sorry, I made a mistake to be ESR*2).
It is same situation for 320MHz channel.
The four Spatial Reuse fields, 1, 2, 3, and 4, are arranged in increasing order of frequency and correspond to:
— For 20 MHz one Spatial Reuse field corresponding to the entire 20 MHz (the other 3 Spatial Reuse
fields indicate the same value). The Spatial Reuse fields only apply to the 20 MHz used for the transmission.
— For 40 MHz two Spatial Reuse fields with the Spatial Reuse 3 field identical in value to the Spatial
Reuse 1 field and the Spatial Reuse 4 field identical in value to the Spatial Reuse 2 field. Each pair of
Spatial Reuse fields only applies to the corresponding 20 MHz used for the transmission.
— For 80 MHz four Spatial Reuse fields, one for each 20 MHz subchannel
• For an OFDMA transmission of a given BW, each of the Spatial Reuse fields that corresponds to
a 20 MHz sub-band is also applicable to the 242-tone RU that is most closely aligned in frequency
(in the tone plan for that BW) with the aforementioned 20 MHz sub-band. The correspondence
from an Spatial Reuse field to a 242-tone RU also holds for any RU within the 242-
tone RU. The above also implies that a 20 MHz OBSS STA uses the Spatial Reuse field corresponding
to its 20 MHz channel, a 40 MHz OBSS STA located on the lower frequency half of
the 80 MHz BSS uses Spatial Reuse 1 field, Spatial Reuse 2 field values and a 40 MHz OBSS
STA located on the upper frequency half of the 80 MHz BSS uses Spatial Reuse 3 field, Spatial
Reuse 4 field values
— For 160 MHz and 80+80 MHz four Spatial Reuse fields, one for each
40 MHz subchannel
• For an OFDMA transmission of a given BW, each of the Spatial Reuse fields that corresponds to
a 40 MHz sub-band is also applicable to the 484-tone RU that is most closely aligned in frequency
(in the tone-plan of that BW) with the aforementioned 40 MHz sub-band. The correspondence
from an Spatial Reuse field to a 484-tone RU also holds for any RU within the 484-tone
RU.
From: Eunsung Park <esung.park@xxxxxxx>
Sent: Tuesday, April 13, 2021 12:05 PM
To: 顾祥新 (Xiangxin Gu) <Xiangxin.Gu@xxxxxxxxxx>;
STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Cc: hg.cho@xxxxxxx
Subject: RE: [STDS-802-11-TGBE] An issue of HSR and ESR
Hi Xiangxin,
Could you elaborate on why HSR should be ESR*2?
Best regards,
Eunsung
From:
顾祥新
(Xiangxin Gu) [mailto:Xiangxin.Gu@xxxxxxxxxx]
Sent: Tuesday, April 13, 2021 12:51 PM
To: STDS-802-11-TGBE@xxxxxxxxxxxxxxxxx
Subject: [STDS-802-11-TGBE] An issue of HSR and ESR
Hi,
Regarding to the following agreed proposal, I think the HSR should be ESR*2 for 160MHz and 320MHz band width.
Am I right?
21/0152r1 (UL Spatial Reuse Subfield Design in Enhanced Trigger Frame, Eunsung Park, LGE)
SP#2
Do you support the following?
·
When EHT TB PPDU is triggered in R1, 16-bit UL Spatial Reuse subfield in the Common Info field of Trigger Frame is defined as follows
o
20MHz
§
HSR1 = HSR2 = HSR3 = HSR4 = ESR1
o
40MHz
§
HSR1 = HSR3 = ESR1
§
HSR2 = HSR4 = ESR2
o
80/160MHz
§
HSR1 = HSR2 = ESR1
§
HSR3 = HSR4 = ESR2
§
Modified ESR can be used depending on the normalization
o
320MHz
§
HSR1 = HSR2 = HSR3 = HSR4 = min(ESR1, ESR2)
§
Modified ESR can be used depending on the normalization
o
HSR1, HSR2, HSR3 and HSR4 denote the first, second, third and fourth 4-bit values in 16-bit UL Spatial Reuse subfield, respectively
o
ESR1 and ESR2 denote the first and second 4-bit values in 8-bit Spatial Reuse subfield in the Special User Info field of Trigger Frame, respectively
·
Note: This is for release 1
Y/N/A/No response: 86/19/82/144
BR,
Xiangxin
Unisoc Technologies Co., Ltd.
+86 21 20360600 3324
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