Signaling in a high efficiency wireless network
A wireless device generating a High-Efficiency (HE) PHY Protocol Data Unit (PPDU) for transmission sets a Packet Extension Disambiguity bit of an HE Signal-A (HE-SIG-A) field of the HE PPDU based on respective durations of a packet extension of the HE PPDU and a signal extension of the HE PPDU. The wireless device may determine whether a relationship T P E + ( 4 × ⌈ TXTIME - T S E - 2 0 4 ⌉ - ( TXTIME - T S E - 2 0 ) ) ≥ T S Y M is satisfied, where T PE is the duration of the packet extension, TXTIME is a transmission time of the HE PPDU, T SE is the duration of the signal extension, and T SYM is a duration of symbols in a data field of the HE PPDU. The wireless device may set the Packet Extension Disambiguity bit to one when the relationship is satisfied; and to zero when the relationship is not satisfied.
1. A method performed by a receiving wireless device, the method comprising:
receiving a High-Efficiency (HE) PHY Protocol Data Unit (PPDU) including a data field;
estimating a duration of a data field;
determining a number of symbols in the data field according to
N
S
Y
M
=
⌊
T
DATA
_
EST
T
S
Y
M
⌋
-
b
2
wherein N SYM is the number of symbols, T DATA_EST is the estimated duration of the data field, T SYM is a duration of a symbol included in the data field, and b 2 is a value of a Packet Extension (PE) Disambiguity bit of a PE field of an HE Signal A (HE-SIG-A) field of the HE PPDU;
determining a duration of a packet extension of the HE PPDU according to
T
P
E
=
⌊
T
DATA
_
EST
-
(
N
S
Y
M
×
T
S
Y
M
)
4
⌋
×
4
µs
;
wherein T PE is the duration of the packet extension; and
determining a state of a primary channel used to receive the HE PPDU as idle after waiting for the duration of the packet extension.
2. The method of claim 1 , wherein estimating the duration of the data field comprises determining the estimated duration of the data field according to
T
DATA
_
EST
=
L_LENGTH
+
m
+
3
3
×
4
-
T
R
L
-
SIG
-
T
H
E
-
SIG
-
A
-
T
H
E
-
SIG
-
B
-
T
HE
_
PREAMBLE
wherein L_LENGTH is a value indicated by a length field of an L-SIG field of the HE PPDU, T RL-SIG is a Repeated non-HT SIGNAL field duration of the HE PPDU, T HE-SIG-A is the HE-SIG-A field duration, T HE-SIG-B is a duration of each OFDM symbol in an HE Signal B (HE-SIG-B) field of the HE PPDU, T HE_PREAMBLE is a duration of an HE preamble of the HE PPDU, and m is one when the HE PPDU is an HE_MU PPDU or an HE extended range SU PPDU and is two otherwise.
3. The method of claim 1 , wherein estimating the duration of the data field comprises determining the estimated duration of the data field according to
T
DATA
_
EST
=
L_LENGTH
+
m
+
3
3
×
4
-
T
R
L
-
SIG
-
T
H
E
-
SIG
-
A
-
T
HE
_
PREAMBLE
wherein L_LENGTH is a value indicated by a length field of an L-SIG field of the HE PPDU, T RL-SIG is a Repeated non-HT SIGNAL field duration of the HE PPDU, T HE-SIG-A is the HE-SIG-A field duration, T HE_PREAMBLE is a duration of an HE preamble of the HE PPDU, and m is one when the HE PPDU is an HE_MU PPDU or an HE extended range SU PPDU and is two otherwise.
4. The method of claim 1 , wherein estimating the duration of the data field comprises determining the estimated duration of the data field according to
T
DATA
_
EST
=
L_LENGTH
+
m
+
3
3
×
4
-
T
R
L
-
SIG
-
T
H
E
-
SIG
-
A
-
T
H
E
-
SIG
-
A
-
R
-
T
HE
_
PREAMBLE
wherein L_LENGTH is a value indicated by a length field of an L-SIG field of the HE PPDU, T RL-SIG is a Repeated non-HT SIGNAL field duration of the HE PPDU, T HE-SIG-A is the HE-SIG-A field duration, T HE-SIG-A-R is an HE-SIG-A field duration in an HE extended range Single User (SU) PPDU, T HE_PREAMBLE is a duration of an HE preamble of the HE PPDU, and m is one when the HE PPDU is an HE_MU PPDU or an HE extended range SU PPDU and is two otherwise.
5. A wireless device comprising:
a receiver circuit;
wherein the wireless device is configured to perform steps comprising:
receiving, using the receiver circuit, a High-Efficiency (HE) PHY Protocol Data Unit (PPDU) including a data field;
estimating a duration of a data field;
determining a number of symbols in the data field according to
N
S
Y
M
=
⌊
T
DATA
_
EST
T
S
Y
M
⌋
-
b
2
wherein N SYM is the number of symbols, T DATA_EST is the estimated duration of the data field, T SYM is a duration of a symbol included in the data field, and b 2 is a value of a Packet Extension (PE) Disambiguity bit of a PE field of an HE Signal A (HE-SIG-A) field of the HE PPDU;
determining a duration of a packet extension of the HE PPDU according to
T
P
E
=
⌊
T
DATA
_
EST
-
(
N
S
Y
M
×
T
S
Y
M
)
4
⌋
×
4
µs
;
wherein T PE is the duration of the packet extension; and
determining a state of a primary channel used to receive the HE PPDU as idle after waiting for the duration of the packet extension.
6. The wireless device of claim 5 , wherein estimating the duration of the data field comprises determining the estimated duration of the data field according to
T
DATA
_
EST
=
L_LENGTH
+
m
+
3
3
×
4
-
T
R
L
-
SIG
-
T
H
E
-
SIG
-
A
-
T
H
E
-
SIG
-
B
-
T
HE
_
PREAMBLE
wherein L_LENGTH is a value indicated by a length field of an L-SIG field of the HE PPDU, T RL-SIG is a Repeated non-HT SIGNAL field duration of the HE PPDU, T HE-SIG-A is the HE-SIG-A field duration, T HE-SIG-B is a duration of each OFDM symbol in an HE Signal B (HE-SIG-B) field of the HE PPDU, T HE_PREAMBLE is a duration of an HE preamble of the HE PPDU, and m is one when the HE PPDU is an HE_MU PPDU or an HE extended range SU PPDU and is two otherwise.
7. The wireless device of claim 5 , wherein estimating the duration of the data field comprises determining the estimated duration of the data field according to
T
DATA
_
EST
=
L_LENGTH
+
m
+
3
3
×
4
-
T
R
L
-
SIG
-
T
H
E
-
SIG
-
A
-
T
HE
_
PREAMBLE
wherein L_LENGTH is a value indicated by a length field of an L-SIG field of the HE PPDU, T RL-SIG is a Repeated non-HT SIGNAL field duration of the HE PPDU, T HE-SIG-A is the HE-SIG-A field duration, T HE_PREAMBLE is a duration of an HE preamble of the HE PPDU, and m is one when the HE PPDU is an HE_MU PPDU or an HE extended range SU PPDU and is two otherwise.
8. The wireless device of claim 5 , wherein estimating the duration of the data field comprises determining the estimated duration of the data field according to
T
DATA
_
EST
=
L_LENGTH
+
m
+
3
3
×
4
-
T
R
L
-
SIG
-
T
H
E
-
SIG
-
A
-
T
H
E
-
SIG
-
A
-
R
-
T
HE
_
PREAMBLE
wherein L_LENGTH is a value indicated by a length field of an L-SIG field of the HE PPDU, T RL-SIG is a Repeated non-HT SIGNAL field duration of the HE PPDU, T HE-SIG-A is the HE-SIG-A field duration, T HE-SIG-A-R is an HE-SIG-A field duration in an HE extended range Single User (SU) PPDU, T HE_PREAMBLE is a duration of an HE preamble of the HE PPDU, and m is one when the HE PPDU is an HE_MU PPDU or an HE extended range SU PPDU and is two otherwise.
9. A non-transitory computer-readable media (CRM) including computer programming instructions that, when executed by a wireless communication device, cause the wireless communication device to perform steps comprising:
receiving a High-Efficiency (HE) PHY Protocol Data Unit (PPDU) including a data field;
estimating a duration of a data field;
determining a number of symbols in the data field according to
N
S
Y
M
=
⌊
T
DATA
_
EST
T
S
Y
M
⌋
-
b
2
wherein N SYM is the number of symbols, T DATA_EST is the estimated duration of the data field, T SYM is a duration of a symbol included in the data field, and b 2 is a value of a Packet Extension (PE) Disambiguity bit of a PE field of an HE Signal A (HE-SIG-A) field of the HE PPDU;
determining a duration of a packet extension of the HE PPDU according to
T
P
E
=
⌊
T
DATA
_
EST
-
(
N
S
Y
M
×
T
S
Y
M
)
4
⌋
×
4
µs
;
wherein T PE is the duration of the packet extension; and
determining a state of a primary channel used to receive the HE PPDU as idle after waiting for the duration of the packet extension.
10. The method of claim 9 , wherein estimating the duration of the data field comprises determining the estimated duration of the data field according to
T
DATA
_
EST
=
L_LENGTH
+
m
+
3
3
×
4
-
T
R
L
-
SIG
-
T
H
E
-
SIG
-
A
-
T
H
E
-
SIG
-
B
-
T
HE
_
PREAMBLE
wherein L_LENGTH is a value indicated by a length field of an L-SIG field of the HE PPDU, T RL-SIG is a Repeated non-HT SIGNAL field duration of the HE PPDU, T HE-SIG-A is the HE-SIG-A field duration, T HE-SIG-B is a duration of each OFDM symbol in an HE Signal B (HE-SIG-B) field of the HE PPDU, T HE_PREAMBLE is a duration of an HE preamble of the HE PPDU, and m is one when the HE PPDU is an HE_MU PPDU or an HE extended range SU PPDU and is two otherwise.
11. The method of claim 9 , wherein estimating the duration of the data field comprises determining the estimated duration of the data field according to
T
DATA
_
EST
=
L_LENGTH
+
m
+
3
3
×
4
-
T
R
L
-
SIG
-
T
H
E
-
SIG
-
A
-
T
HE
_
PREAMBLE
wherein L_LENGTH is a value indicated by a length field of an L-SIG field of the HE PPDU, T RL-SIG is a Repeated non-HT SIGNAL field duration of the HE PPDU, T HE-SIG-A is the HE-SIG-A field duration, T HE_PREAMBLE is a duration of an HE preamble of the HE PPDU, and m is one when the HE PPDU is an HE_MU PPDU or an HE extended range SU PPDU and is two otherwise.
12. The method of claim 9 , wherein estimating the duration of the data field comprises determining the estimated duration of the data field according to
T
DATA
_
EST
=
L_LENGTH
+
m
+
3
3
×
4
-
T
R
L
-
SIG
-
T
H
E
-
SIG
-
A
-
T
H
E
-
SIG
-
A
-
R
-
T
HE
_
PREAMBLE
wherein L_LENGTH is a value indicated by a length field of an L-SIG field of the HE PPDU, T RL-SIG is a Repeated non-HT SIGNAL field duration of the HE PPDU, T HE-SIG-A is the HE-SIG-A field duration, T HE-SIG-A-R is an HE-SIG-A field duration in an HE extended range Single User (SU) PPDU, T HE_PREAMBLE is a duration of an HE preamble of the HE PPDU and m is one when the HE PPDU is an HE_MU PPDU or an HE extended range SU PPDU and is two otherwise.