Performance Test FAQs
What Are PHY Rates on the Air Interface?
The mainstream 802.11 (WLAN) protocol is developing from 802.11n to 802.11ax. The following tables describe PHY rates supported by 802.11 standards.
NSS |
MCS |
20 MHz Normal-GI |
20 MHz Short-GI |
40 MHz Normal-GI |
40 MHz Short-GI |
---|---|---|---|---|---|
1 |
MCS0 |
7 |
7 |
14 |
15 |
MCS1 |
13 |
14 |
27 |
30 |
|
MCS2 |
20 |
22 |
41 |
45 |
|
MCS3 |
26 |
29 |
54 |
60 |
|
MCS4 |
39 |
43 |
81 |
90 |
|
MCS5 |
52 |
58 |
108 |
120 |
|
MCS6 |
59 |
65 |
122 |
135 |
|
MCS7 |
65 |
72 |
135 |
150 |
|
MCS8 |
78 |
87 |
162 |
180 |
|
MCS9 |
87 |
96 |
180 |
200 |
|
2 |
MCS0 |
13 |
14 |
27 |
30 |
MCS1 |
26 |
29 |
54 |
60 |
|
MCS2 |
39 |
43 |
81 |
90 |
|
MCS3 |
52 |
58 |
108 |
120 |
|
MCS4 |
78 |
87 |
162 |
180 |
|
MCS5 |
104 |
116 |
216 |
240 |
|
MCS6 |
117 |
130 |
243 |
270 |
|
MCS7 |
130 |
144 |
270 |
300 |
|
MCS8 |
156 |
173 |
324 |
360 |
|
MCS9 |
173 |
193 |
360 |
400 |
|
3 |
MCS0 |
20 |
22 |
41 |
45 |
MCS1 |
39 |
43 |
81 |
90 |
|
MCS2 |
59 |
65 |
122 |
135 |
|
MCS3 |
78 |
87 |
162 |
180 |
|
MCS4 |
117 |
130 |
243 |
270 |
|
MCS5 |
156 |
173 |
324 |
360 |
|
MCS6 |
176 |
195 |
365 |
405 |
|
MCS7 |
195 |
217 |
405 |
450 |
|
MCS8 |
234 |
260 |
486 |
540 |
|
MCS9 |
260 |
289 |
540 |
600 |
|
4 |
MCS0 |
26 |
29 |
54 |
60 |
MCS1 |
52 |
58 |
108 |
120 |
|
MCS2 |
78 |
87 |
162 |
180 |
|
MCS3 |
104 |
116 |
216 |
240 |
|
MCS4 |
156 |
173 |
324 |
360 |
|
MCS5 |
208 |
231 |
432 |
480 |
|
MCS6 |
234 |
260 |
486 |
540 |
|
MCS7 |
260 |
289 |
540 |
600 |
|
MCS8 |
312 |
347 |
648 |
720 |
|
MCS9 |
347 |
385 |
720 |
800 |
NSS |
MCS |
20 MHz Normal-GI |
20 MHz Short-GI |
40 MHz Normal-GI |
40 MHz Short-GI |
80 MHz Normal-GI |
80 MHz Short-GI |
160 MHz Normal-GI |
160 MHz Short-GI |
---|---|---|---|---|---|---|---|---|---|
1 |
MCS0 |
7 |
7 |
14 |
15 |
29 |
33 |
59 |
65 |
MCS1 |
13 |
14 |
27 |
30 |
59 |
65 |
117 |
130 |
|
MCS2 |
20 |
22 |
41 |
45 |
88 |
98 |
176 |
195 |
|
MCS3 |
26 |
29 |
54 |
60 |
117 |
130 |
234 |
260 |
|
MCS4 |
39 |
43 |
81 |
90 |
176 |
195 |
351 |
390 |
|
MCS5 |
52 |
58 |
108 |
120 |
234 |
260 |
468 |
520 |
|
MCS6 |
59 |
65 |
122 |
135 |
263 |
293 |
527 |
585 |
|
MCS7 |
65 |
72 |
135 |
150 |
293 |
325 |
585 |
650 |
|
MCS8 |
78 |
87 |
162 |
180 |
351 |
390 |
702 |
780 |
|
MCS9 |
87 |
96 |
180 |
200 |
390 |
433 |
780 |
867 |
|
2 |
MCS0 |
13 |
14 |
27 |
30 |
59 |
65 |
117 |
130 |
MCS1 |
26 |
29 |
54 |
60 |
117 |
130 |
234 |
260 |
|
MCS2 |
39 |
43 |
81 |
90 |
176 |
195 |
351 |
390 |
|
MCS3 |
52 |
58 |
108 |
120 |
234 |
260 |
468 |
520 |
|
MCS4 |
78 |
87 |
162 |
180 |
351 |
390 |
702 |
780 |
|
MCS5 |
104 |
116 |
216 |
240 |
468 |
520 |
936 |
1040 |
|
MCS6 |
117 |
130 |
243 |
270 |
527 |
585 |
1053 |
1170 |
|
MCS7 |
130 |
144 |
270 |
300 |
585 |
650 |
1170 |
1300 |
|
MCS8 |
156 |
173 |
324 |
360 |
702 |
780 |
1404 |
1560 |
|
MCS9 |
173 |
193 |
360 |
400 |
780 |
867 |
1560 |
1733 |
|
3 |
MCS0 |
20 |
22 |
41 |
45 |
88 |
98 |
176 |
195 |
MCS1 |
39 |
43 |
81 |
90 |
176 |
195 |
351 |
390 |
|
MCS2 |
59 |
65 |
122 |
135 |
263 |
293 |
527 |
585 |
|
MCS3 |
78 |
87 |
162 |
180 |
351 |
390 |
702 |
780 |
|
MCS4 |
117 |
130 |
243 |
270 |
527 |
585 |
1053 |
1170 |
|
MCS5 |
156 |
173 |
324 |
360 |
702 |
780 |
1404 |
1560 |
|
MCS6 |
176 |
195 |
365 |
405 |
790 |
878 |
1580 |
1755 |
|
MCS7 |
195 |
217 |
405 |
450 |
878 |
975 |
1755 |
1950 |
|
MCS8 |
234 |
260 |
486 |
540 |
1053 |
1170 |
2106 |
2340 |
|
MCS9 |
260 |
289 |
540 |
600 |
1170 |
1300 |
2340 |
2600 |
|
4 |
MCS0 |
26 |
29 |
54 |
60 |
117 |
130 |
234 |
260 |
MCS1 |
52 |
58 |
108 |
120 |
234 |
260 |
468 |
520 |
|
MCS2 |
78 |
87 |
162 |
180 |
351 |
390 |
702 |
780 |
|
MCS3 |
104 |
116 |
216 |
240 |
468 |
520 |
936 |
1040 |
|
MCS4 |
156 |
173 |
324 |
360 |
702 |
780 |
1404 |
1560 |
|
MCS5 |
208 |
231 |
432 |
480 |
936 |
1040 |
1872 |
2080 |
|
MCS6 |
234 |
260 |
486 |
540 |
1053 |
1170 |
2106 |
2340 |
|
MCS7 |
260 |
289 |
540 |
600 |
1170 |
1300 |
2340 |
2600 |
|
MCS8 |
312 |
347 |
648 |
720 |
1404 |
1560 |
2808 |
3120 |
|
MCS9 |
347 |
385 |
720 |
800 |
1560 |
1733 |
3120 |
3467 |
|
5 |
MCS0 |
33 |
36 |
68 |
75 |
146 |
163 |
293 |
325 |
MCS1 |
65 |
72 |
135 |
150 |
293 |
325 |
585 |
650 |
|
MCS2 |
98 |
108 |
203 |
225 |
439 |
488 |
878 |
975 |
|
MCS3 |
130 |
144 |
270 |
300 |
585 |
650 |
1170 |
1300 |
|
MCS4 |
195 |
217 |
405 |
450 |
878 |
975 |
1755 |
1950 |
|
MCS5 |
260 |
289 |
540 |
600 |
1170 |
1300 |
2340 |
2600 |
|
MCS6 |
293 |
325 |
608 |
675 |
1316 |
1463 |
2633 |
2925 |
|
MCS7 |
325 |
361 |
675 |
750 |
1463 |
1625 |
2925 |
3250 |
|
MCS8 |
390 |
433 |
810 |
900 |
1755 |
1950 |
3510 |
3900 |
|
MCS9 |
433 |
481 |
900 |
1000 |
1950 |
2167 |
3900 |
4333 |
|
6 |
MCS0 |
39 |
43 |
81 |
90 |
176 |
195 |
351 |
390 |
MCS1 |
78 |
87 |
162 |
180 |
351 |
390 |
702 |
780 |
|
MCS2 |
117 |
130 |
243 |
270 |
527 |
585 |
1053 |
1170 |
|
MCS3 |
156 |
173 |
324 |
360 |
702 |
780 |
1404 |
1560 |
|
MCS4 |
234 |
260 |
486 |
540 |
1053 |
1170 |
2106 |
2340 |
|
MCS5 |
312 |
347 |
648 |
720 |
1404 |
1560 |
2808 |
3120 |
|
MCS6 |
351 |
390 |
729 |
810 |
1580 |
1755 |
3159 |
3510 |
|
MCS7 |
390 |
433 |
810 |
900 |
1755 |
1950 |
3510 |
3900 |
|
MCS8 |
468 |
520 |
972 |
1080 |
2106 |
2340 |
4212 |
4680 |
|
MCS9 |
520 |
578 |
1080 |
1200 |
2340 |
2600 |
4680 |
5200 |
|
7 |
MCS0 |
46 |
51 |
95 |
105 |
205 |
228 |
410 |
455 |
MCS1 |
91 |
101 |
189 |
210 |
410 |
455 |
819 |
910 |
|
MCS2 |
137 |
152 |
284 |
315 |
614 |
683 |
1229 |
1365 |
|
MCS3 |
182 |
202 |
378 |
420 |
819 |
910 |
1638 |
1820 |
|
MCS4 |
273 |
303 |
567 |
630 |
1229 |
1365 |
2457 |
2730 |
|
MCS5 |
364 |
404 |
756 |
840 |
1638 |
1820 |
3276 |
3640 |
|
MCS6 |
410 |
455 |
851 |
945 |
1843 |
2048 |
3686 |
4095 |
|
MCS7 |
455 |
506 |
945 |
1050 |
2048 |
2275 |
4095 |
4550 |
|
MCS8 |
546 |
607 |
1134 |
1260 |
2457 |
2730 |
4914 |
5460 |
|
MCS9 |
607 |
674 |
1260 |
1400 |
2730 |
3033 |
5460 |
6067 |
|
8 |
MCS0 |
52 |
58 |
108 |
120 |
234 |
260 |
468 |
520 |
MCS1 |
104 |
116 |
216 |
240 |
468 |
520 |
936 |
1040 |
|
MCS2 |
156 |
173 |
324 |
360 |
702 |
780 |
1404 |
1560 |
|
MCS3 |
208 |
231 |
432 |
480 |
936 |
1040 |
1872 |
2080 |
|
MCS4 |
312 |
347 |
648 |
720 |
1404 |
1560 |
2808 |
3120 |
|
MCS5 |
416 |
462 |
864 |
960 |
1872 |
2080 |
3744 |
4160 |
|
MCS6 |
468 |
520 |
972 |
1080 |
2106 |
2340 |
4212 |
4680 |
|
MCS7 |
520 |
578 |
1080 |
1200 |
2340 |
2600 |
4680 |
5200 |
|
MCS8 |
624 |
693 |
1296 |
1440 |
2808 |
3120 |
5616 |
6240 |
|
MCS9 |
693 |
770 |
1440 |
1600 |
3120 |
3467 |
6240 |
6933 |
NSS |
MCS |
20 MHz 3.2 us |
20 MHz 1.6 us |
20 MHz 0.8 us |
40 MHz 3.2 us |
40 MHz 1.6 us |
40 MHz 0.8 us |
80 MHz 3.2 us |
80 MHz 1.6 us |
80 MHz 0.8 us |
160 MHz 3.2 us |
160 MHz 1.6 us |
160 MHz 0.8 us |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 |
0 |
7 |
8 |
9 |
15 |
16 |
17 |
31 |
34 |
36 |
61 |
68 |
72 |
1 |
15 |
16 |
17 |
29 |
33 |
34 |
61 |
68 |
72 |
123 |
136 |
144 |
|
2 |
22 |
24 |
26 |
44 |
49 |
52 |
92 |
102 |
108 |
184 |
204 |
216 |
|
3 |
29 |
33 |
34 |
59 |
65 |
69 |
123 |
136 |
144 |
245 |
272 |
288 |
|
4 |
44 |
49 |
52 |
88 |
98 |
103 |
184 |
204 |
216 |
368 |
408 |
432 |
|
5 |
59 |
65 |
69 |
117 |
130 |
138 |
245 |
272 |
288 |
490 |
544 |
576 |
|
6 |
66 |
73 |
77 |
132 |
146 |
155 |
276 |
306 |
324 |
551 |
613 |
649 |
|
7 |
73 |
81 |
86 |
146 |
163 |
172 |
306 |
340 |
360 |
613 |
681 |
721 |
|
8 |
88 |
98 |
103 |
176 |
195 |
206 |
368 |
408 |
432 |
735 |
817 |
865 |
|
9 |
98 |
108 |
115 |
195 |
217 |
229 |
408 |
454 |
480 |
817 |
907 |
961 |
|
10 |
110 |
122 |
129 |
219 |
244 |
258 |
459 |
510 |
540 |
919 |
1021 |
1081 |
|
11 |
122 |
135 |
143 |
244 |
271 |
287 |
510 |
567 |
600 |
1021 |
1134 |
1201 |
|
2 |
0 |
15 |
16 |
17 |
29 |
33 |
34 |
61 |
68 |
72 |
123 |
136 |
144 |
1 |
29 |
33 |
34 |
59 |
65 |
69 |
123 |
136 |
144 |
245 |
272 |
288 |
|
2 |
44 |
49 |
52 |
88 |
98 |
103 |
184 |
204 |
216 |
368 |
408 |
432 |
|
3 |
59 |
65 |
69 |
117 |
130 |
138 |
245 |
272 |
288 |
490 |
544 |
576 |
|
4 |
88 |
98 |
103 |
176 |
195 |
206 |
368 |
408 |
432 |
735 |
817 |
865 |
|
5 |
117 |
130 |
138 |
234 |
260 |
275 |
490 |
544 |
576 |
980 |
1089 |
1153 |
|
6 |
132 |
146 |
155 |
263 |
293 |
310 |
551 |
613 |
649 |
1103 |
1225 |
1297 |
|
7 |
146 |
163 |
172 |
293 |
325 |
344 |
613 |
681 |
721 |
1225 |
1361 |
1441 |
|
8 |
176 |
195 |
206 |
351 |
390 |
413 |
735 |
817 |
865 |
1470 |
1633 |
1729 |
|
9 |
195 |
217 |
229 |
390 |
433 |
459 |
817 |
907 |
961 |
1633 |
1815 |
1922 |
|
10 |
219 |
244 |
258 |
439 |
488 |
516 |
919 |
1021 |
1081 |
1838 |
2042 |
2162 |
|
11 |
244 |
271 |
287 |
488 |
542 |
574 |
1021 |
1134 |
1201 |
2042 |
2269 |
2402 |
|
3 |
0 |
22 |
24 |
26 |
44 |
49 |
52 |
92 |
102 |
108 |
184 |
204 |
216 |
1 |
44 |
49 |
52 |
88 |
98 |
103 |
184 |
204 |
216 |
368 |
408 |
432 |
|
2 |
66 |
73 |
77 |
132 |
146 |
155 |
276 |
306 |
324 |
551 |
613 |
649 |
|
3 |
88 |
98 |
103 |
176 |
195 |
206 |
368 |
408 |
432 |
735 |
817 |
865 |
|
4 |
132 |
146 |
155 |
263 |
293 |
310 |
551 |
613 |
649 |
1103 |
1225 |
1297 |
|
5 |
176 |
195 |
206 |
351 |
390 |
413 |
735 |
817 |
865 |
1470 |
1633 |
1729 |
|
6 |
197 |
219 |
232 |
395 |
439 |
465 |
827 |
919 |
973 |
1654 |
1838 |
1946 |
|
7 |
219 |
244 |
258 |
439 |
488 |
516 |
919 |
1021 |
1081 |
1838 |
2042 |
2162 |
|
8 |
263 |
293 |
310 |
527 |
585 |
619 |
1103 |
1225 |
1297 |
2205 |
2450 |
2594 |
|
9 |
293 |
325 |
344 |
585 |
650 |
688 |
1225 |
1361 |
1441 |
2450 |
2722 |
2882 |
|
10 |
329 |
366 |
387 |
658 |
731 |
774 |
1378 |
1531 |
1621 |
2756 |
3063 |
3243 |
|
11 |
366 |
406 |
430 |
731 |
813 |
860 |
1531 |
1701 |
1801 |
3063 |
3403 |
3603 |
|
4 |
0 |
29 |
33 |
34 |
59 |
65 |
69 |
123 |
136 |
144 |
245 |
272 |
288 |
1 |
59 |
65 |
69 |
117 |
130 |
138 |
245 |
272 |
288 |
490 |
544 |
576 |
|
2 |
88 |
98 |
103 |
176 |
195 |
206 |
368 |
408 |
432 |
735 |
817 |
865 |
|
3 |
117 |
130 |
138 |
234 |
260 |
275 |
490 |
544 |
576 |
980 |
1089 |
1153 |
|
4 |
176 |
195 |
206 |
351 |
390 |
413 |
735 |
817 |
865 |
1470 |
1633 |
1729 |
|
5 |
234 |
260 |
275 |
468 |
520 |
551 |
980 |
1089 |
1153 |
1960 |
2178 |
2306 |
|
6 |
263 |
293 |
310 |
527 |
585 |
619 |
1103 |
1225 |
1297 |
2205 |
2450 |
2594 |
|
7 |
293 |
325 |
344 |
585 |
650 |
688 |
1225 |
1361 |
1441 |
2450 |
2722 |
2882 |
|
8 |
351 |
390 |
413 |
702 |
780 |
826 |
1470 |
1633 |
1729 |
2940 |
3267 |
3459 |
|
9 |
390 |
433 |
459 |
780 |
867 |
918 |
1633 |
1815 |
1922 |
3267 |
3630 |
3843 |
|
10 |
439 |
488 |
516 |
878 |
975 |
1032 |
1838 |
2042 |
2162 |
3675 |
4083 |
4324 |
|
11 |
488 |
542 |
574 |
975 |
1083 |
1147 |
2042 |
2269 |
2402 |
4083 |
4537 |
4804 |
|
5 |
0 |
37 |
41 |
43 |
73 |
81 |
86 |
153 |
170 |
180 |
306 |
340 |
360 |
1 |
73 |
81 |
86 |
146 |
163 |
172 |
306 |
340 |
360 |
613 |
681 |
721 |
|
2 |
110 |
122 |
129 |
219 |
244 |
258 |
459 |
510 |
540 |
919 |
1021 |
1081 |
|
3 |
146 |
163 |
172 |
293 |
325 |
344 |
613 |
681 |
721 |
1225 |
1361 |
1441 |
|
4 |
219 |
244 |
258 |
439 |
488 |
516 |
919 |
1021 |
1081 |
1838 |
2042 |
2162 |
|
5 |
293 |
325 |
344 |
585 |
650 |
688 |
1225 |
1361 |
1441 |
2450 |
2722 |
2882 |
|
6 |
329 |
366 |
387 |
658 |
731 |
774 |
1378 |
1531 |
1621 |
2756 |
3063 |
3243 |
|
7 |
366 |
406 |
430 |
731 |
813 |
860 |
1531 |
1701 |
1801 |
3063 |
3403 |
3603 |
|
8 |
439 |
488 |
516 |
878 |
975 |
1032 |
1838 |
2042 |
2162 |
3675 |
4083 |
4324 |
|
9 |
488 |
542 |
574 |
975 |
1083 |
1147 |
2042 |
2269 |
2402 |
4083 |
4537 |
4804 |
|
10 |
548 |
609 |
645 |
1097 |
1219 |
1290 |
2297 |
2552 |
2702 |
4594 |
5104 |
5404 |
|
11 |
609 |
677 |
717 |
1219 |
1354 |
1434 |
2552 |
2836 |
3002 |
5104 |
5671 |
6005 |
|
6 |
0 |
44 |
49 |
52 |
88 |
98 |
103 |
184 |
204 |
216 |
368 |
408 |
432 |
1 |
88 |
98 |
103 |
176 |
195 |
206 |
368 |
408 |
432 |
735 |
817 |
865 |
|
2 |
132 |
146 |
155 |
263 |
293 |
310 |
551 |
613 |
649 |
1103 |
1225 |
1297 |
|
3 |
176 |
195 |
206 |
351 |
390 |
413 |
735 |
817 |
865 |
1470 |
1633 |
1729 |
|
4 |
263 |
293 |
310 |
527 |
585 |
619 |
1103 |
1225 |
1297 |
2205 |
2450 |
2594 |
|
5 |
351 |
390 |
413 |
702 |
780 |
826 |
1470 |
1633 |
1729 |
2940 |
3267 |
3459 |
|
6 |
395 |
439 |
465 |
790 |
878 |
929 |
1654 |
1838 |
1946 |
3308 |
3675 |
3891 |
|
7 |
439 |
488 |
516 |
878 |
975 |
1032 |
1838 |
2042 |
2162 |
3675 |
4083 |
4324 |
|
8 |
527 |
585 |
619 |
1053 |
1170 |
1239 |
2205 |
2450 |
2594 |
4410 |
4900 |
5188 |
|
9 |
585 |
650 |
688 |
1170 |
1300 |
1376 |
2450 |
2722 |
2882 |
4900 |
5444 |
5765 |
|
10 |
658 |
731 |
774 |
1316 |
1463 |
1549 |
2756 |
3063 |
3243 |
5513 |
6125 |
6485 |
|
11 |
731 |
813 |
860 |
1463 |
1625 |
1721 |
3063 |
3403 |
3603 |
6125 |
6806 |
7206 |
|
7 |
0 |
51 |
57 |
60 |
102 |
114 |
120 |
214 |
238 |
252 |
429 |
476 |
504 |
1 |
102 |
114 |
120 |
205 |
228 |
241 |
429 |
476 |
504 |
858 |
953 |
1009 |
|
2 |
154 |
171 |
181 |
307 |
341 |
361 |
643 |
715 |
757 |
1286 |
1429 |
1513 |
|
3 |
205 |
228 |
241 |
410 |
455 |
482 |
858 |
953 |
1009 |
1715 |
1906 |
2018 |
|
4 |
307 |
341 |
361 |
614 |
683 |
723 |
1286 |
1429 |
1513 |
2573 |
2858 |
3026 |
|
5 |
410 |
455 |
482 |
819 |
910 |
964 |
1715 |
1906 |
2018 |
3430 |
3811 |
4035 |
|
6 |
461 |
512 |
542 |
921 |
1024 |
1084 |
1929 |
2144 |
2270 |
3859 |
4288 |
4540 |
|
7 |
512 |
569 |
602 |
1024 |
1138 |
1204 |
2144 |
2382 |
2522 |
4288 |
4764 |
5044 |
|
8 |
614 |
683 |
723 |
1229 |
1365 |
1445 |
2573 |
2858 |
3026 |
5145 |
5717 |
6053 |
|
9 |
683 |
758 |
803 |
1365 |
1517 |
1606 |
2858 |
3176 |
3363 |
5717 |
6352 |
6725 |
|
10 |
768 |
853 |
903 |
1536 |
1706 |
1807 |
3216 |
3573 |
3783 |
6431 |
7146 |
7566 |
|
11 |
853 |
948 |
1004 |
1706 |
1896 |
2007 |
3573 |
3970 |
4203 |
7146 |
7940 |
8407 |
|
8 |
0 |
59 |
65 |
69 |
117 |
130 |
138 |
245 |
272 |
288 |
490 |
544 |
576 |
1 |
117 |
130 |
138 |
234 |
260 |
275 |
490 |
544 |
576 |
980 |
1089 |
1153 |
|
2 |
176 |
195 |
206 |
351 |
390 |
413 |
735 |
817 |
865 |
1470 |
1633 |
1729 |
|
3 |
234 |
260 |
275 |
468 |
520 |
551 |
980 |
1089 |
1153 |
1960 |
2178 |
2306 |
|
4 |
351 |
390 |
413 |
702 |
780 |
826 |
1470 |
1633 |
1729 |
2940 |
3267 |
3459 |
|
5 |
468 |
520 |
551 |
936 |
1040 |
1101 |
1960 |
2178 |
2306 |
3920 |
4356 |
4612 |
|
6 |
527 |
585 |
619 |
1053 |
1170 |
1239 |
2205 |
2450 |
2594 |
4410 |
4900 |
5188 |
|
7 |
585 |
650 |
688 |
1170 |
1300 |
1376 |
2450 |
2722 |
2882 |
4900 |
5444 |
5765 |
|
8 |
702 |
780 |
826 |
1404 |
1560 |
1652 |
2940 |
3267 |
3459 |
5880 |
6533 |
6918 |
|
9 |
780 |
867 |
918 |
1560 |
1733 |
1835 |
3267 |
3630 |
3843 |
6533 |
7259 |
7686 |
|
10 |
878 |
975 |
1032 |
1755 |
1950 |
2065 |
3675 |
4083 |
4324 |
7350 |
8167 |
8647 |
|
11 |
975 |
1083 |
1147 |
1950 |
2167 |
2294 |
4083 |
4537 |
4804 |
8167 |
9074 |
9608 |
Why Is the Actual Performance Data Far Lower Than the Claimed Rate?
The claimed rate refers to the rate at the physical layer (PHY), which depends on the number of spatial streams, frequency bandwidth, and modulation and coding scheme (MCS) rate (that is, modulation scheme).
- The number of spatial streams is the number of antennas.
- Frequency bandwidth refers to the occupied spectrum resources, such as 20 MHz, 40 MHz, 80 MHz, and 160 MHz.
- The MCS rate corresponds to the modulation scheme. A larger MCS rate indicates a higher packet transmission rate, thereby requiring higher signal strength and quality.
For example, in 802.11ax, the PHY rate is 9.6 Gbit/s at the conditions of eight spatial streams, 160 MHz frequency bandwidth, and MCS11. During actual WLAN deployment, however, the tested rate cannot reach the maximum value due to limited STA capabilities and continuous networking requirements. In typical networking, the average PHY rate of Wi-Fi 6 is about 516 Mbit/s (two spatial streams + 40 MHz + MCS10), and that of Wi-Fi 5 is about 400 Mbit/s (two spatial streams + 40 MHz + MCS9). The specific calculation logic is as follows:
- Spatial stream: Most STAs support dual spatial streams or a single spatial stream, and only a few STAs support three spatial streams.
- Frequency bandwidth: Considering the available channels and radar channels at 160 MHz frequency bandwidth, the 40 MHz bandwidth is typically used by 5 GHz radios in normal continuous networking scenarios.
- MCS: MCS11 (the highest order) in Wi-Fi 6 requires a signal-to-noise ratio (SNR) of greater than 35 dB. In normal networking, the average MCS rate of Wi-Fi 6 can reach MCS10 and that of Wi-Fi 5 MCS9.
This is how the PHY rate is affected. From the PHY to the service layer, other overheads are involved.
Bandwidth loss from the PHY to the service layer includes time consumption of the process required by 802.11 MAC layer communication, and header and trailer overheads of data frames at different layers.
Specifically, bandwidth provided by the communications system can be calculated using the number of bits transmitted per unit time, that is, number of bits/time.
- Number of valid bits transmitted
In the preceding figure, A-MSDU Subfrm1 marked in dashed lines is the packet sent from the Ethernet, where the MSDU field is the service packet sent from the upper layer (packet described in the test result of Chariot). The entire 802.11 packet also has other headers including PLCP Preamble, PLCP Header, and 802.11 Header.
- Time for transmitting the preceding bits
The following figure shows the protocol process through which each data packet transmitted on the 802.11 air interface goes.
The transmitter sends a data frame after Distributed Interframe Space (DIFS) times out and waits for the backoff time. After receiving the data frame, the receiver waits until Short Interframe Space (SIFS) times out and sends an ACK frame to the transmitter. It can be considered that a data packet is successfully sent only after the entire process is correctly completed. In this data packet, only the Frame Body field in 802.11 DATA carries valid data, and other fields (such as DIFS, Backoff, SIFS, and ACK) are overheads for ensuring valid transmission. In multi-user (MU) scenarios, the backoff window is doubled due to collisions, which further reduces the transmission efficiency.
In conclusion, the actual performance test result of a single STA is affected by the following:
- Wi-Fi protocol and the number of spatial streams supported by the STA
- Signal strength, frequency bandwidth, and air interface environment of the AP associated with the STA
- Overheads during data transmission
In a relatively ideal environment, the actual rate of a single STA is about 60% to 70% of the negotiated PHY rate.
In MU scenarios, multiple STAs share bandwidth resources, and more concurrent STAs cause more transmission loss. Therefore, the actual test result is much lower than that in single-user (SU) scenarios.
What Are the Precautions for the X00 Mbps Performance Test in Dormitory Scenarios?
When both the AP and terminal support 2T2R dual spatial streams, the performance is sensitive to the displacement and angle changes between the AP and terminal, and may fluctuate greatly. Therefore, during the performance test, it is recommended that you repeat the test for multiple times by using different postures and short-distance offsets of the terminal at each test point, and finally use the maximum value.
In (Non-Maximum) Speed Test Scenarios, What Are the Possible Causes for a Low Tested Speed of a Terminal?
The tested speed of a terminal using the Wi-Fi network is low. The possible cause is that the terminal rate limiting function is configured on the device. During the speed test, ensure that the terminal rate limiting function is disabled. After the speed test is complete, enable the terminal rate limiting function as required.
Cloud AP
On the site configuration page, choose
. On the policy control page, disable static and dynamic rate limiting for terminal traffic.WAC + Fit AP
Disable static and dynamic rate limiting for STAs.
<HUAWEI> system-view [HUAWEI] wlan [HUAWEI-wlan-view] traffic-profile name best [HUAWEI-wlan-traffic-prof-p1] undo rate-limit client up [HUAWEI-wlan-traffic-prof-p1] undo rate-limit client down [HUAWEI-wlan-traffic-prof-p1] rate-limit client dynamic disable