Chapter 2 : Wi-Fi timeouts
AIFS
BW |
Spec-Clause |
Modulation scheme |
Band |
Spec-Name |
RxTx TurnAround Time(us) |
CCA_time (us) |
Slot (us) |
Sifs (us) |
aifsn BK (us) |
aifsn BE (us) |
aifsn VI (us) |
aifsn VO (us) |
AIFS BK (us) |
AIFS BE (us) |
AIFS VI (us) |
AIFS VO (us) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
20 |
Clause-16 |
DSSS |
2.4GHz |
11b |
5 |
15 |
20 |
10 |
7 |
3 |
2 |
2 |
150 |
70 |
50 |
50 |
20 |
Clause-17 |
HR/DSSS, CCK, PBCC |
2.4GHz |
11b |
5 |
15 |
20 |
10 |
7 |
3 |
2 |
2 |
150 |
70 |
50 |
50 |
20 |
Clause-18 |
OFDM |
5GHz |
11a |
5 |
4 |
9 |
16 |
7 |
3 |
2 |
2 |
79 |
43 |
34 |
34 |
10 |
Clause-18 |
OFDM |
5GHz |
11a |
5 |
8 |
13 |
32 |
7 |
3 |
2 |
2 |
123 |
71 |
58 |
58 |
5 |
Clause-18 |
OFDM |
5GHz |
11a |
5 |
16 |
21 |
64 |
7 |
3 |
2 |
2 |
211 |
127 |
106 |
106 |
20/40 |
Clause-19 |
DSSS, HR/DSSS, CCK, PBCC, ERP-PBCC, DSSS-OFDM, ERP-OFDM |
2.4GHz |
11g |
5 |
15 |
20 |
10 |
7 |
3 |
2 |
2 |
150 |
70 |
50 |
50 |
20/40 |
Clause-19 |
DSSS, HR/DSSS, CCK, PBCC, ERP-PBCC, DSSS-OFDM, ERP-OFDM |
2.4GHz |
11g |
5 |
4 |
9 |
10 |
7 |
3 |
2 |
2 |
73 |
37 |
28 |
28 |
20/40/80 |
Clause-20 |
HT |
2.4GHz |
11n |
5 |
15 |
20 |
10 |
7 |
3 |
2 |
2 |
150 |
70 |
50 |
50 |
20/40/80 |
Clause-20 |
HT |
2.4GHz |
11n |
5 |
4 |
9 |
10 |
7 |
3 |
2 |
2 |
73 |
37 |
28 |
28 |
20/40/80 |
Clause-20 |
HT |
5GHz |
11n |
5 |
4 |
9 |
16 |
7 |
3 |
2 |
2 |
79 |
43 |
34 |
34 |
TxOP Limit
AC |
CWmin |
CWmax |
AIFSN |
TxOP Limit Clause-16,17 (802.11b) |
TxOP Limit Clause-18,19,20 (802.11a, 802.11g) |
|---|---|---|---|---|---|
BK |
aCWmin |
aCWmax |
7 |
0 |
0 |
BE |
aCWmin |
aCWmax |
3 |
0 |
0 |
VI |
(aCWmin+1)/2 - 1 |
aCWmin |
2 |
6.016 ms |
3.008 ms |
VO |
(aCWmin+1)/4 - 1 |
(aCWmin+1)/2 - 1 |
2 |
3.264 ms |
1.504 ms |
ACK/CTS timeout
BW |
Spec-Clause |
Modulation |
Band |
Spec-Name |
RxTx TurnAround Time (us) |
CCA (us) |
Slot (us) |
Sifs (us) |
aPHY-RX-START-Delay (us) |
ACK/CTS timeout (us) |
Spec-ref |
Preamble |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
20 |
Clause-16 |
DSSS |
2.4GHz |
11b |
5 |
15 |
20 |
10 |
192 |
222 |
16.3.3 |
|
20 |
Clause-17 |
HR/DSSS, CCK, PBCC |
2.4GHz |
11b |
5 |
15 |
20 |
10 |
192 |
222 |
17.3.3 |
Long |
20 |
Clause-17 |
HR/DSSS, CCK, PBCC |
2.4GHz |
11b |
5 |
15 |
20 |
10 |
96 |
126 |
17.3.3 |
Short |
20 |
Clause-18 |
OFDM |
5GHz |
11a |
5 |
4 |
9 |
16 |
25 |
50 |
18.4.4 |
|
10 |
Clause-18 |
OFDM |
5GHz |
11a |
5 |
8 |
13 |
32 |
49 |
94 |
18.4.4 |
|
5 |
Clause-18 |
OFDM |
5GHz |
11a |
5 |
16 |
21 |
64 |
97 |
182 |
18.4.4 |
|
20/40 |
Clause-19 |
ERP-OFDM |
2.4GHz |
11g |
5 |
15 |
20 |
10 |
24 |
54 |
19.8.4 |
|
20/40 |
Clause-19 |
ERP-DSSS/CCK |
2.4GHz |
11g |
5 |
15 |
20 |
10 |
192 |
222 |
19.8.4 |
Long |
20/40 |
Clause-19 |
ERP-OFDM |
2.4GHz |
11g |
5 |
15 |
9 |
10 |
24 |
43 |
19.8.4 |
|
20/40 |
Clause-19 |
ERP-DSSS/CCK |
2.4GHz |
11g |
5 |
15 |
9 |
10 |
96 |
115 |
19.8.4 |
Short |
20/40/80 |
Clause-20 |
HT |
5GHz |
11na |
5 |
4 |
9 |
16 |
33 |
58 |
20.4.4 |
|
10 |
Clause-20 |
HT |
5GHz |
11na |
5 |
4 |
13 |
32 |
49 |
94 |
20.4.4 |
|
5 |
Clause-20 |
HT |
5GHz |
11na |
5 |
4 |
21 |
64 |
97 |
182 |
20.4.4 |
|
20/40/80 |
Clause-20 |
HT |
2.4GHz |
11ng |
5 |
15 |
20 |
10 |
33 |
63 |
20.4.4 |
|
20/40/80 |
Clause-20 |
HT |
2.4GHz |
11ng |
5 |
4 |
9 |
10 |
33 |
52 |
20.4.4 |