Hi Lili,
Thanks for the comments.
Regarding up to three or four, please see my previous email.
Regarding CID 24101, my suggestion would be to resolve that comment after my document is finalized. That would make things easier.
regards
于健 Ross Yu
Huawei Technologies
发件人: *** 802.11 TGax - HEW - High Efficiency WLAN *** [mailto:STDS-802-11-TGAX@xxxxxxxxxxxxxxxxx]
代表 Lili Hervieu
发送时间: 2020年4月12日
5:11
收件人: STDS-802-11-TGAX@xxxxxxxxxxxxxxxxx
主题: Re: [STDS-802-11-TGAX] Allowed puncturing patterns
Hello,
I think full puncturing in S80 should be explicitly disallowed. As highlighted in some comments, full puncturing in S80 doesn’t make sense. In addition, it will cause unnecessary interference to legacy devices due to
the “relaxed” punctured mask at -20 dBr.
ð
Recommendation is to change
four (subchannels) to three (subchannels)
In addition,
the simulation results presented in 802.11-19/2087r0 show that the victim SINR degradation is increasing significantly with the number of contiguous punctured channels. SINR degradation can reach up to ~21 dB when 4 channels are punctured
and the victim is at the edge of the punctured channels.
I’m supporting option e to permit contiguous punctured channels up to two x 20 MHz in order to limit the victim SINR degradation (~11 dB for 2 contiguous 20 MHz punctured channels). 40 MHz puncturing recognizes the existence
of 30 MHz wide incumbents in the 6 GHz band. Note this comment is part of CID 24101.
ð
Recommendation is to add “with no contiguous puncturing larger than 2 x 20 MHz subchannels”
to the 160 MHz or 80+80 MHz preamble puncture “modes”
Below is the latest text sent by Mark with the proposed modifications in red.
Thanks,
Lili
Table 9-321b—Subfields of the HE PHY Capabilities Information field,
Punctured Preamble Rx field definition
B0 indicates support for the reception of an 80 MHz preamble where the only punctured subchannel is the secondary 20 MHz
subchannel is punctured.
B1 indicates support for the reception of an 80 MHz preamble where the only punctured subchannel is
one of the two 20 MHz subchannels in the secondary 40 MHz channel is punctured.
B2 indicates support for the reception of a 160 MHz or 80+80 MHz preamble
with no contiguous puncturing larger than 2 x 20 MHz subchannels,
where
the only punctured subchannels are the secondary 20 MHz channel in the primary 80 MHz channel is punctured and zero to
four
three of the 20 MHz subchannels in the secondary 80 MHz channel.
B3 indicates support for the reception of a 160 MHz or 80+80 MHz preamble with no contiguous
puncturing larger than 2 x 20 MHz subchannels, where the
only punctured subchannels are one or both of the 20 MHz subchannels in the secondaryprimary 40 MHz channel and zero to
four
three of the 20 MHz subchannels in the secondaryprimary 80 MHz channel is present.
10.23.2.5 EDCA channel access in a VHT, HE or TVHT BSS
[Note for group discussion: text highlighted in yellow should probably be changed to something like “all of the 20 MHz subchannels that are not punctured
were idle”.]
i) Transmit an
80 MHz HE MU PPDU with preamble puncturing in 80 MHz where in the preamble only the only punctured subchannel is the secondary 20 MHz channel is punctured, if
the secondary 40 MHz channel was idle during an interval of PIFS immediately preceding the start of the TXOP.
j) Transmit an
80 MHz HE MU PPDU with preamble puncturing in 80 MHz where in the preamble the
only punctured subchannel is one of the two 20 MHz subchannels in the secondary 40 MHz channel is punctured, if the secondary 20 MHz channel,
and one of the two 20 MHz subchannels
ofin the secondary 40 MHz channel werewas idle
during an interval of PIFS immediately preceding the start of the TXOP.
k) Transmit an
160 MHz or 80+80 MHz HE MU PPDU with no contiguous puncturing larger than 2 x 20 MHz subchannels,
with preamble puncturing in 160 MHz or 80+80 MHz where in the primary 80 MHz of the preamble
the only punctured subchannels are the secondary 20 MHz channel is punctured and zero to
four
three of the 20 MHz subchannels in the secondary 80 MHz channel, if the secondary 40 MHz channel, and
at least one of the four 20 MHz subchannels in the secondary 80 MHz channel were idle during an interval of PIFS immediately preceding the start of the TXOP.
l) Transmit an
160 MHz or 80+80 MHz HE MU PPDU with no contiguous puncturing larger than 2 x 20 MHz subchannels,
with preamble puncturing in 160 MHz or 80+80 MHz where in the primary 80 MHz of the preamble
the only the primary 40 MHz is present punctured subchannels are one or both of the 20 MHz subchannels in the secondary 40 MHz channel and zero to
four
three of the 20 MHz subchannels in the secondary 80 MHz channel, if the secondary 20 MHz channel, and
at least one of the four 20 MHz subchannels in the secondary 80 MHz channel were idle during an interval of PIFS immediately preceding the start of the TXOP.
Table 27-1—TXVECTOR and RXVECTOR parameters, CH_BANDWIDTH value
if FORMAT is HE_MU
HE-CBW-PUNC80-PRI for preamble puncturing in 80 MHz, where in the preamble
the only the punctured subchannel is the secondary 20 MHz
channelis punctured.
HE-CBW-PUNC80-SEC for preamble puncturing in 80 MHz, where in the preamble
the only punctured subchannel is one of the two 20 MHz subchannels in
the secondary 40 MHz channelis punctured.
HE-CBW-PUNC160-PRI20 for preamble puncturing in 160 MHz
with no contiguous puncturing larger than 2 x 20 MHz subchannels, where in
the primary 80 MHz of the preamble the only punctured subchannels are
the secondary 20 MHz channel is punctured and zero to
four three of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC80+80-PRI20 for preamble puncturing in 80+80 MHz
with no contiguous puncturing larger than 2 x 20 MHz subchannels, where in
the primary 80 MHz of the preamble the only punctured subchannels are
the secondary 20 MHz channel is punctured and zero to
four three of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC160-SEC40 for preamble puncturing in 160 MHz or 80+80 MHz with no contiguous
puncturing larger than 2 x 20 MHz subchannels, where in
the primary 80 MHz of the preamble the only punctured subchannels are
primary 40 MHz is present, and at least one or both of the 20 MHz subchannels
that is not in the secondaryprimary 40 MHz channel is punctured and zero to
four
three of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC80+80-SEC40 for preamble puncturing in 80+80 MHz
with no contiguous puncturing larger than 2 x 20 MHz subchannels, where in
the primary 80 MHz of the preamble the only punctured subchannels are
primary 40 MHz is present, and at least one or both of the 20 MHz subchannels
that is not in the secondaryprimary 40 MHz channel is punctured and zero to
four
three of the 20 MHz subchannels in the secondary 80 MHz channel.
Table 27-3— Interpretation of FORMAT, NON_HT Modulation and CH_BANDWIDTH parameters,
CH_BANDWIDTH rows as shown
HE-CBW-PUNC80-PRI: The STA transmits an
80 MHz HE PPDU on the punctured 80 MHz bandwidth where the only punctured subchannel is the secondary 20 MHz
channelis punctured.
HE-CBW-PUNC80-SEC: The STA transmits an
80 MHz HE PPDU on the punctured 80 MHz bandwidth where the only punctured subchannel is one of the two 20 MHz subchannels in
the secondary 40 MHz channelis punctured.
HE-CBW-PUNC160-PRI20: The STA transmits an 160 MHz HE PPDU
with no contiguous puncturing larger than 2 x 20 MHz subchannels, on the punctured 160 MHz bandwidth
where the only punctured subchannels are the secondary 20 MHz channel in the primary 80 MHz is punctured and zero to
four
three of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC80+80-PRI20: The STA transmits an 80+80 MHz HE PPDU
with no contiguous puncturing larger than 2 x 20 MHz subchannels,
on the punctured 80+80 MHz bandwidth where the only punctured subchannels are the secondary 20 MHz channel in the primary 80 MHz is punctured and zero to
four
three of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC160-SEC40: The STA transmits an 160 MHz HE PPDU
with no contiguous puncturing larger than 2 x 20 MHz subchannels, on the punctured 160 MHz bandwidth
where the only punctured subchannels are primary 40 MHz in the primary 80 MHz is present, and at least
one or both of the 20 MHz subchannels that is not in the
secondaryprimary 40 MHz channel is punctured and zero to
four
three of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC80+80-SEC40: The STA transmits an 80+80 MHz HE PPDU
with no contiguous puncturing larger than 2 x 20 MHz subchannels, on the punctured 80+80 MHz bandwidth
where the only punctured subchannels are primary 40 MHz in the primary 80 MHz is present, and at least
one or both of the 20 MHz subchannels that is not in the
secondaryprimary 40 MHz channel is punctured and zero to
four
three of the 20 MHz subchannels in the secondary 80 MHz channel.
Table 27-4— Interpretation of CH_BANDWIDTH and INACTIVE_SUBCHANNELS parameters when FORMAT is equal to NON_HT and NON_HT_MODULATION is equal to NON_HT_DUP_OFDM,
CH_BANDWIDTH rows as shown, for punctured PPDUs
CBW80: The bit corresponding to the primary 20 MHz channel set to 0 and
one or two other bits set to 0 that correspond to
any other subchannels in the primary 80 MHz, all other bits set to 1
CBW160: The bit corresponding to the primary 20 MHz channel set to 0 and
onetwo to six other bits set to 0 that correspond to
any other subchannels in the 160 MHz, all other bits set to 1
CBW80+80: The bit corresponding to the primary 20 MHz channel set to 0 and
onetwo to six other bits set to 0 that correspond to
any other subchannels in the 80+80 MHz, all other bits set to 1
Table 27-20—HE-SIG-A field of an HE MU PPDU, Bandwidth field
Set to 4 for preamble puncturing in 80 MHz, where in the preamble
the only punctured subchannel is the secondary 20 MHz channel is punctured.
Set to 5 for preamble puncturing in 80 MHz, where in the preamble
the only punctured subchannel is one of the two 20 MHz subchannels in
the secondary 40 MHz channel is punctured.
Set to 6 for preamble puncturing in 160 MHz or 80+80 MHz
with no contiguous puncturing larger than 2 x 20 MHz subchannels, where in
the primary 80 MHz of the preamble the only punctured subchannels are the secondary 20 MHz channel is punctured and zero to
four three of the 20 MHz subchannels in the secondary 80 MHz channel.
Set to 7 for preamble puncturing in 160 MHz or 80+80 MHz
with no contiguous puncturing larger than 2 x 20 MHz subchannels, where in
the primary 80 MHz of the preamble the only punctured subchannels are one or both of the 20 MHz subchannels in the secondaryprimary 40 MHz channel is present, and at least one 20 MHz subchannel that is not in the primary 40 MHz
is punctured and zero to four
three of the 20 MHz subchannels in the secondary 80 MHz channel.
C.3 MIB Detail
dot11HEPuncturedPreambleRxImplemented OBJECT-TYPE
SYNTAX OCTET STRING(SIZE(21))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is a capability variable.
Its value is determined by device capabilities.
This attribute is a bitmap that indicates the preamble prunctured channeling support,
where bit
equal to
0 is set to 1 to indicate support for the reception of
an 80 MHz preamble where the secondary 20 MHz
subchannel is punctured,
bit
equal to
1 is set to 1 to indicate support for the reception of an 80 MHz preamble where
one of the two 20 MHz subchannels in the secondary 40 MHz channel is punctured,
bit
equal to
2 is set to 1 to indicate support for the reception of
a 160 MHz or 80+80 MHz preamble where
in the pri-
mary 80 MHz of the preamble only
the secondary 20 MHz channel is punctured, and
bit
equal to
3 is set to 1 to indicate support for the reception of
a 160 MHz or 80+80 MHz preamble where
one or both of the 20 MHz subchannels in the secondary 40 MHz channel are punctured.
in the primary 80 MHz of the preamble, the primary 40 MHz is present."
::= { dot11PhyHEEntry
2 }
Change “MHz is” to “MHz channel is” at 274.59.
From: *** 802.11 TGax - HEW - High Efficiency WLAN *** <STDS-802-11-TGAX@xxxxxxxxxxxxxxxxx>
On Behalf Of Mark RISON
Sent: Saturday, April 11, 2020 2:11 AM
To: STDS-802-11-TGAX@xxxxxxxxxxxxxxxxx
Subject: Re: [STDS-802-11-TGAX] Allowed puncturing patterns
OK, I think I'm hearing consensus emerging around option a), i.e.:
4) -x--
5) --x- or ---x
6) -x--???? including -x--xxxx
7) --x-???? including --x-xxxx, or
---x???? including ---xxxxx, or
--xx???? including --xxxxxx
Here then are the changes I propose to resolve the comment (the stuff
in green is the stuff that would have to be changed (to "three") if
we decide that it should not be allowed to puncture the entire S80
after all):
Table 9-321b—Subfields of the HE PHY Capabilities Information field,
Punctured Preamble Rx field definition
B0 indicates support for the reception of an 80 MHz preamble where the only punctured subchannel is the secondary 20 MHz
subchannel is punctured.
B1 indicates support for the reception of an 80 MHz preamble where the only punctured subchannel is
one of the two 20 MHz subchannels in the secondary 40 MHz channel is punctured.
B2 indicates support for the reception of a 160 MHz or 80+80 MHz preamble where
the only punctured subchannels are the secondary 20 MHz channel in the primary 80 MHz channel is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
B3 indicates support for the reception of a 160 MHz or 80+80 MHz preamble where the
only punctured subchannels are one or both of the 20 MHz subchannels in the secondaryprimary 40 MHz channel and zero to
four of the 20 MHz subchannels in the
secondaryprimary 80 MHz channel is present.
10.23.2.5 EDCA channel access in a VHT, HE or TVHT BSS
[Note for group discussion: text highlighted in yellow should probably be changed to something like “all of the 20 MHz subchannels that are not punctured
were idle”.]
i) Transmit an
80 MHz HE MU PPDU with preamble puncturing in 80 MHz where in the preamble only the only punctured subchannel is the secondary 20 MHz channel is punctured, if
the secondary 40 MHz channel was idle during an interval of PIFS immediately preceding the start of the TXOP.
j) Transmit an
80 MHz HE MU PPDU with preamble puncturing in 80 MHz where in the preamble the
only punctured subchannel is one of the two 20 MHz subchannels in the secondary 40 MHz channel is punctured, if the secondary 20 MHz channel,
and one of the two 20 MHz subchannels
ofin the secondary 40 MHz channel werewas idle[MR1]
during an interval of PIFS immediately preceding the start of the TXOP.
k) Transmit an
160 MHz or 80+80 MHz HE MU PPDU with preamble puncturing in 160 MHz or 80+80 MHz
where in the primary 80 MHz of the preamble the only punctured subchannels are the secondary 20 MHz channel is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel, if the secondary 40 MHz channel, and
at least one of the four 20 MHz subchannels in the secondary 80 MHz channel were idle during an interval of PIFS immediately preceding the start of the TXOP.
l) Transmit an
160 MHz or 80+80 MHz HE MU PPDU with preamble puncturing in 160 MHz or 80+80 MHz
where in the primary 80 MHz of the preamble the only the primary 40 MHz is present punctured subchannels are one or both of the 20 MHz subchannels in the secondary 40 MHz channel and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel, if the secondary 20 MHz channel, and
at least one of the four 20 MHz subchannels in the secondary 80 MHz channel were idle during an interval of PIFS immediately preceding the start of the TXOP.
Table 27-1—TXVECTOR and RXVECTOR parameters, CH_BANDWIDTH value
if FORMAT is HE_MU
HE-CBW-PUNC80-PRI for preamble puncturing in 80 MHz, where in the preamble
the only the punctured subchannel is the secondary 20 MHz
channelis punctured.
HE-CBW-PUNC80-SEC for preamble puncturing in 80 MHz, where in the preamble
the only punctured subchannel is one of the two 20 MHz subchannels in
the secondary 40 MHz channelis punctured.
HE-CBW-PUNC160-PRI20 for preamble puncturing in 160 MHz, where in
the primary 80 MHz of the preamble the only punctured subchannels are
the secondary 20 MHz channel is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC80+80-PRI20 for preamble puncturing in 80+80 MHz, where in
the primary 80 MHz of the preamble the only punctured subchannels are
the secondary 20 MHz channel is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC160-SEC40 for preamble puncturing in 160 MHz or 80+80 MHz, where in
the primary 80 MHz of the preamble the only punctured subchannels are
primary 40 MHz is present, and at least one or both of the 20 MHz subchannels
that is not in the secondaryprimary 40 MHz channel is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC80+80-SEC40 for preamble puncturing in 80+80 MHz, where in
the primary 80 MHz of the preamble the only punctured subchannels are
primary 40 MHz is present, and at least one or both of the 20 MHz subchannels
that is not in the secondaryprimary 40 MHz channel is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
Table 27-3— Interpretation of FORMAT, NON_HT Modulation and CH_BANDWIDTH parameters,
CH_BANDWIDTH rows as shown
HE-CBW-PUNC80-PRI: The STA transmits an
80 MHz HE PPDU on the punctured 80 MHz bandwidth where the only punctured subchannel is the secondary 20 MHz
channelis punctured.
HE-CBW-PUNC80-SEC: The STA transmits an
80 MHz HE PPDU on the punctured 80 MHz bandwidth where the only punctured subchannel is one of the two 20 MHz subchannels in
the secondary 40 MHz channelis punctured.
HE-CBW-PUNC160-PRI20: The STA transmits an 160 MHz HE PPDU
on the punctured 160 MHz bandwidth where the only punctured subchannels are the secondary 20 MHz channel in the primary 80 MHz is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC80+80-PRI20: The STA transmits an 80+80 MHz HE PPDU
on the punctured 80+80 MHz bandwidth where the only punctured subchannels are the secondary 20 MHz channel in the primary 80 MHz is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC160-SEC40: The STA transmits an 160 MHz HE PPDU
on the punctured 160 MHz bandwidth where the only punctured subchannels are
primary 40 MHz in the primary 80 MHz is present, and at least one or both of the 20 MHz subchannels
that is not in the secondaryprimary 40 MHz channel is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
HE-CBW-PUNC80+80-SEC40: The STA transmits an 80+80 MHz HE PPDU
on the punctured 80+80 MHz bandwidth where the only punctured subchannels are
primary 40 MHz in the primary 80 MHz is present, and at least one or both of the 20 MHz subchannels
that is not in the secondaryprimary 40 MHz channel is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
Table 27-4— Interpretation of CH_BANDWIDTH and INACTIVE_SUBCHANNELS parameters when FORMAT is equal to NON_HT and NON_HT_MODULATION is equal to NON_HT_DUP_OFDM,
CH_BANDWIDTH rows as shown, for punctured PPDUs
CBW80: The bit corresponding to the primary 20 MHz channel set to 0 and
one or two other bits set to 0 that correspond to
any other subchannels in the primary 80 MHz, all other bits set to 1
CBW160: The bit corresponding to the primary 20 MHz channel set to 0 and
onetwo to six other bits set to 0 that correspond to
any other subchannels in the 160 MHz, all other bits set to 1
CBW80+80: The bit corresponding to the primary 20 MHz channel set to 0 and
onetwo to six other bits set to 0 that correspond to
any other subchannels in the 80+80 MHz, all other bits set to 1
Table 27-20—HE-SIG-A field of an HE MU PPDU, Bandwidth field
Set to 4 for preamble puncturing in 80 MHz, where in the preamble
the only punctured subchannel is the secondary 20 MHz channel is punctured.
Set to 5 for preamble puncturing in 80 MHz, where in the preamble
the only punctured subchannel is one of the two 20 MHz subchannels in
the secondary 40 MHz channel is punctured.
Set to 6 for preamble puncturing in 160 MHz or 80+80 MHz, where in
the primary 80 MHz of the preamble the only punctured subchannels are the secondary 20 MHz channel is punctured and zero to
four of the 20 MHz subchannels in the secondary 80 MHz channel.
Set to 7 for preamble puncturing in 160 MHz or 80+80 MHz, where in
the primary 80 MHz of the preamble the only punctured subchannels are one or both of the 20 MHz subchannels in the secondaryprimary 40 MHz channel is present, and at least one 20 MHz subchannel that is not in the primary 40 MHz
is punctured and zero to four of the 20 MHz subchannels in the secondary 80 MHz channel.
C.3 MIB Detail
dot11HEPuncturedPreambleRxImplemented OBJECT-TYPE
SYNTAX OCTET STRING(SIZE(21))
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is a capability variable.
Its value is determined by device capabilities.
This attribute is a bitmap that indicates the preamble prunctured channeling support,
where bit
equal to
0 is set to 1 to indicate support for the reception of
an 80 MHz preamble where the secondary 20 MHz
subchannel is punctured,
bit
equal to
1 is set to 1 to indicate support for the reception of an 80 MHz preamble where
one of the two 20 MHz subchannels in the secondary 40 MHz channel is punctured,
bit
equal to
2 is set to 1 to indicate support for the reception of
a 160 MHz or 80+80 MHz preamble where
in the pri-
mary 80 MHz of the preamble only
the secondary 20 MHz channel is punctured, and
bit
equal to
3 is set to 1 to indicate support for the reception of
a 160 MHz or 80+80 MHz preamble where
one or both of the 20 MHz subchannels in the secondary 40 MHz channel are punctured.
in the primary 80 MHz of the preamble, the primary 40 MHz is present."
::= { dot11PhyHEEntry
2 }
Change “MHz is” to “MHz channel is” at 274.59.
This is the follow-up to the teleconf discussion just now, to
attempt to reach consensus on which puncturing patterns are and
are not allowed.
STRAWMAN PROPOSAL:
If the primary 20 MHz channel is the leftmost one, and x means
punctured, - means not punctured and ? means can be punctured,
then these correspond to only allowing the following patterns
in each case (obviously the patterns will get rearranged if the
P20 is not the leftmost one) for the value of the Bandwidth
field in the HE-SIG-A field of an HE MU PPDU:
4) -x--
5) --x- or ---x
6) -x--???? but not -x--xxxx
7) --x-???? but not --x-xxxx, or
---x???? but not ---xxxxx, or
--xx???? but not --xxxxxx
During the teleconf I think I heard some variants proposed (calling
the one above z):
a) Allow full puncturing of S80, i.e.:
4) -x--
5) --x- or ---x
6) -x--???? including -x--xxxx
7) --x-???? including --x-xxxx, or
---x???? including ---xxxxx, or
--xx???? including --xxxxxx
b) Don't allow any puncturing of S80 (maybe the D1.0 wording?), i.e.:
4) -x--
5) --x- or ---x
6) -x------
7) --x----- or
---x---- or
--xx----
c) Allow "any 2" puncturing for the 7 case (I think I heard something
like that?), i.e.:
4) -x--
5) --x- or ---x
6) -x--???? [all x for ? TBD]
7) --x-???? where exactly one of the ?s is a x, or
---x???? where exactly one of the ?s is a x, or
----???? where exactly two of the ?s are an x, or
--xx----
d) Or was it "at least 2" puncturing for the 7 case, i.e.:
4) -x--
5) --x- or ---x
6) -x--???? [all x for ? TBD]
7) --x-???? where between 1 and 3 (4 TBD) of the ?s are xs, or
---x???? where between 1 and 3 (4 TBD) of the ?s are xs, or
----???? where between 2 and 3 (4 TBD) of the ?s are xs, or
--xx???? where between 0 and 3 (4 TBD) of the ?s are xs
Plus a variant to any of the above:
e) For any/all of the above, don't allow more than 2 adjacent xs
for the 160M case (obviously N/A for 80 and I think also for 80+80)
Please select your option (z or a-d, plus e) or otherwise describe
your understanding.
Happy Easter, and best wishes to you, your colleagues and your families,
Mark
--
Mark RISON, Standards Architect, WLAN English/Esperanto/Français
Samsung Cambridge Solution Centre Tel: +44 1223 434600
Innovation Park, Cambridge CB4 0DS Fax: +44 1223 434601
ROYAUME UNI WWW:
http://www.samsung.com/uk
--
Mark RISON, Standards Architect, WLAN English/Esperanto/Français
Samsung Cambridge Solution Centre Tel: +44 1223 434600
Innovation Park, Cambridge CB4 0DS Fax: +44 1223 434601
ROYAUME UNI WWW:
http://www.samsung.com/uk
To unsubscribe from the STDS-802-11-TGAX list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGAX&A=1
To unsubscribe from the STDS-802-11-TGAX list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGAX&A=1
To unsubscribe from the STDS-802-11-TGAX list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGAX&A=1